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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 | */ | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/if_arp.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/rtnetlink.h> | |
17 | #include <net/mac80211.h> | |
18 | #include "ieee80211_i.h" | |
19 | #include "sta_info.h" | |
e9f207f0 | 20 | #include "debugfs_netdev.h" |
ee385855 | 21 | #include "mesh.h" |
0d143fe1 | 22 | #include "led.h" |
24487981 | 23 | #include "driver-ops.h" |
0d143fe1 | 24 | |
c771c9d8 JB |
25 | /** |
26 | * DOC: Interface list locking | |
27 | * | |
28 | * The interface list in each struct ieee80211_local is protected | |
29 | * three-fold: | |
30 | * | |
31 | * (1) modifications may only be done under the RTNL | |
32 | * (2) modifications and readers are protected against each other by | |
33 | * the iflist_mtx. | |
34 | * (3) modifications are done in an RCU manner so atomic readers | |
35 | * can traverse the list in RCU-safe blocks. | |
36 | * | |
37 | * As a consequence, reads (traversals) of the list can be protected | |
38 | * by either the RTNL, the iflist_mtx or RCU. | |
39 | */ | |
40 | ||
41 | ||
0d143fe1 JB |
42 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
43 | { | |
44 | int meshhdrlen; | |
45 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
46 | ||
47 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
48 | ||
49 | /* FIX: what would be proper limits for MTU? | |
50 | * This interface uses 802.3 frames. */ | |
51 | if (new_mtu < 256 || | |
52 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
53 | return -EINVAL; | |
54 | } | |
55 | ||
56 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
57 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
58 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
59 | dev->mtu = new_mtu; | |
60 | return 0; | |
61 | } | |
62 | ||
47846c9b JB |
63 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
64 | { | |
65 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
66 | int ret; | |
67 | ||
9607e6b6 | 68 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
69 | return -EBUSY; |
70 | ||
71 | ret = eth_mac_addr(dev, addr); | |
72 | ||
73 | if (ret == 0) | |
74 | memcpy(sdata->vif.addr, addr, ETH_ALEN); | |
75 | ||
76 | return ret; | |
77 | } | |
78 | ||
0d143fe1 JB |
79 | static inline int identical_mac_addr_allowed(int type1, int type2) |
80 | { | |
81 | return type1 == NL80211_IFTYPE_MONITOR || | |
82 | type2 == NL80211_IFTYPE_MONITOR || | |
83 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || | |
84 | (type1 == NL80211_IFTYPE_WDS && | |
85 | (type2 == NL80211_IFTYPE_WDS || | |
86 | type2 == NL80211_IFTYPE_AP)) || | |
87 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
88 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
89 | (type2 == NL80211_IFTYPE_AP || | |
90 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
91 | } | |
92 | ||
93 | static int ieee80211_open(struct net_device *dev) | |
94 | { | |
b4a4bf5d JB |
95 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
96 | struct ieee80211_sub_if_data *nsdata; | |
97 | struct ieee80211_local *local = sdata->local; | |
0d143fe1 | 98 | struct sta_info *sta; |
0d143fe1 JB |
99 | u32 changed = 0; |
100 | int res; | |
e8975581 | 101 | u32 hw_reconf_flags = 0; |
0d143fe1 JB |
102 | u8 null_addr[ETH_ALEN] = {0}; |
103 | ||
0d143fe1 JB |
104 | /* fail early if user set an invalid address */ |
105 | if (compare_ether_addr(dev->dev_addr, null_addr) && | |
106 | !is_valid_ether_addr(dev->dev_addr)) | |
107 | return -EADDRNOTAVAIL; | |
108 | ||
109 | /* we hold the RTNL here so can safely walk the list */ | |
110 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
111 | struct net_device *ndev = nsdata->dev; | |
112 | ||
9607e6b6 | 113 | if (ndev != dev && ieee80211_sdata_running(nsdata)) { |
0d143fe1 JB |
114 | /* |
115 | * Allow only a single IBSS interface to be up at any | |
116 | * time. This is restricted because beacon distribution | |
117 | * cannot work properly if both are in the same IBSS. | |
118 | * | |
119 | * To remove this restriction we'd have to disallow them | |
120 | * from setting the same SSID on different IBSS interfaces | |
121 | * belonging to the same hardware. Then, however, we're | |
122 | * faced with having to adopt two different TSF timers... | |
123 | */ | |
124 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
125 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) | |
126 | return -EBUSY; | |
127 | ||
128 | /* | |
129 | * The remaining checks are only performed for interfaces | |
130 | * with the same MAC address. | |
131 | */ | |
132 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
133 | continue; | |
134 | ||
135 | /* | |
136 | * check whether it may have the same address | |
137 | */ | |
138 | if (!identical_mac_addr_allowed(sdata->vif.type, | |
139 | nsdata->vif.type)) | |
140 | return -ENOTUNIQ; | |
141 | ||
142 | /* | |
143 | * can only add VLANs to enabled APs | |
144 | */ | |
145 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
146 | nsdata->vif.type == NL80211_IFTYPE_AP) | |
147 | sdata->bss = &nsdata->u.ap; | |
148 | } | |
149 | } | |
150 | ||
151 | switch (sdata->vif.type) { | |
152 | case NL80211_IFTYPE_WDS: | |
153 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
154 | return -ENOLINK; | |
155 | break; | |
156 | case NL80211_IFTYPE_AP_VLAN: | |
157 | if (!sdata->bss) | |
158 | return -ENOLINK; | |
159 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); | |
160 | break; | |
161 | case NL80211_IFTYPE_AP: | |
162 | sdata->bss = &sdata->u.ap; | |
163 | break; | |
164 | case NL80211_IFTYPE_MESH_POINT: | |
165 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
166 | break; | |
167 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
168 | atomic_inc(&local->iff_allmultis); | |
169 | break; | |
170 | case NL80211_IFTYPE_STATION: | |
171 | case NL80211_IFTYPE_MONITOR: | |
172 | case NL80211_IFTYPE_ADHOC: | |
173 | /* no special treatment */ | |
174 | break; | |
175 | case NL80211_IFTYPE_UNSPECIFIED: | |
176 | case __NL80211_IFTYPE_AFTER_LAST: | |
177 | /* cannot happen */ | |
178 | WARN_ON(1); | |
179 | break; | |
180 | } | |
181 | ||
182 | if (local->open_count == 0) { | |
24487981 | 183 | res = drv_start(local); |
0d143fe1 JB |
184 | if (res) |
185 | goto err_del_bss; | |
e8975581 JB |
186 | /* we're brought up, everything changes */ |
187 | hw_reconf_flags = ~0; | |
1f87f7d3 | 188 | ieee80211_led_radio(local, true); |
0d143fe1 JB |
189 | } |
190 | ||
191 | /* | |
192 | * Check all interfaces and copy the hopefully now-present | |
193 | * MAC address to those that have the special null one. | |
194 | */ | |
195 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
196 | struct net_device *ndev = nsdata->dev; | |
197 | ||
198 | /* | |
9607e6b6 | 199 | * No need to check running since we do not allow |
0d143fe1 JB |
200 | * it to start up with this invalid address. |
201 | */ | |
0adc23f5 | 202 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) { |
0d143fe1 JB |
203 | memcpy(ndev->dev_addr, |
204 | local->hw.wiphy->perm_addr, | |
205 | ETH_ALEN); | |
0adc23f5 JL |
206 | memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN); |
207 | } | |
0d143fe1 JB |
208 | } |
209 | ||
0d143fe1 JB |
210 | /* |
211 | * Validate the MAC address for this device. | |
212 | */ | |
213 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
24487981 JB |
214 | if (!local->open_count) |
215 | drv_stop(local); | |
0d143fe1 JB |
216 | return -EADDRNOTAVAIL; |
217 | } | |
218 | ||
219 | switch (sdata->vif.type) { | |
220 | case NL80211_IFTYPE_AP_VLAN: | |
221 | /* no need to tell driver */ | |
222 | break; | |
223 | case NL80211_IFTYPE_MONITOR: | |
224 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
225 | local->cooked_mntrs++; | |
226 | break; | |
227 | } | |
228 | ||
229 | /* must be before the call to ieee80211_configure_filter */ | |
230 | local->monitors++; | |
e8975581 | 231 | if (local->monitors == 1) { |
0869aea0 JB |
232 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
233 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 234 | } |
0d143fe1 JB |
235 | |
236 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
237 | local->fif_fcsfail++; | |
238 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
239 | local->fif_plcpfail++; | |
e3b90ca2 | 240 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
0d143fe1 | 241 | local->fif_control++; |
e3b90ca2 IP |
242 | local->fif_pspoll++; |
243 | } | |
0d143fe1 JB |
244 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
245 | local->fif_other_bss++; | |
246 | ||
0d143fe1 | 247 | ieee80211_configure_filter(local); |
0d143fe1 | 248 | break; |
0d143fe1 | 249 | default: |
1ed32e4f | 250 | res = drv_add_interface(local, &sdata->vif); |
0d143fe1 JB |
251 | if (res) |
252 | goto err_stop; | |
253 | ||
a3c9aa51 AY |
254 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
255 | local->fif_other_bss++; | |
a3c9aa51 | 256 | ieee80211_configure_filter(local); |
a3c9aa51 | 257 | |
0d143fe1 | 258 | ieee80211_start_mesh(sdata); |
e3b90ca2 IP |
259 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
260 | local->fif_pspoll++; | |
261 | ||
e3b90ca2 | 262 | ieee80211_configure_filter(local); |
a3c9aa51 | 263 | } |
e3b90ca2 | 264 | |
0d143fe1 JB |
265 | changed |= ieee80211_reset_erp_info(sdata); |
266 | ieee80211_bss_info_change_notify(sdata, changed); | |
267 | ieee80211_enable_keys(sdata); | |
268 | ||
7986cf95 | 269 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
0d143fe1 JB |
270 | netif_carrier_off(dev); |
271 | else | |
272 | netif_carrier_on(dev); | |
273 | } | |
274 | ||
275 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { | |
276 | /* Create STA entry for the WDS peer */ | |
277 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
278 | GFP_KERNEL); | |
279 | if (!sta) { | |
280 | res = -ENOMEM; | |
281 | goto err_del_interface; | |
282 | } | |
283 | ||
284 | /* no locking required since STA is not live yet */ | |
285 | sta->flags |= WLAN_STA_AUTHORIZED; | |
286 | ||
287 | res = sta_info_insert(sta); | |
288 | if (res) { | |
289 | /* STA has been freed */ | |
290 | goto err_del_interface; | |
291 | } | |
292 | } | |
293 | ||
0d143fe1 JB |
294 | /* |
295 | * set_multicast_list will be invoked by the networking core | |
296 | * which will check whether any increments here were done in | |
297 | * error and sync them down to the hardware as filter flags. | |
298 | */ | |
299 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
300 | atomic_inc(&local->iff_allmultis); | |
301 | ||
302 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
303 | atomic_inc(&local->iff_promiscs); | |
304 | ||
5cff20e6 JB |
305 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
306 | ||
0d143fe1 | 307 | local->open_count++; |
e8975581 JB |
308 | if (hw_reconf_flags) { |
309 | ieee80211_hw_config(local, hw_reconf_flags); | |
0d143fe1 JB |
310 | /* |
311 | * set default queue parameters so drivers don't | |
312 | * need to initialise the hardware if the hardware | |
313 | * doesn't start up with sane defaults | |
314 | */ | |
315 | ieee80211_set_wmm_default(sdata); | |
316 | } | |
317 | ||
10f644a4 | 318 | ieee80211_recalc_ps(local, -1); |
965bedad | 319 | |
0d143fe1 JB |
320 | /* |
321 | * ieee80211_sta_work is disabled while network interface | |
322 | * is down. Therefore, some configuration changes may not | |
323 | * yet be effective. Trigger execution of ieee80211_sta_work | |
324 | * to fix this. | |
325 | */ | |
46900298 | 326 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
42935eca | 327 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
f0706e82 | 328 | |
53623f1a | 329 | netif_start_queue(dev); |
0d143fe1 JB |
330 | |
331 | return 0; | |
332 | err_del_interface: | |
1ed32e4f | 333 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 | 334 | err_stop: |
24487981 JB |
335 | if (!local->open_count) |
336 | drv_stop(local); | |
0d143fe1 JB |
337 | err_del_bss: |
338 | sdata->bss = NULL; | |
339 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
340 | list_del(&sdata->u.vlan.list); | |
341 | return res; | |
342 | } | |
343 | ||
344 | static int ieee80211_stop(struct net_device *dev) | |
345 | { | |
346 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
347 | struct ieee80211_local *local = sdata->local; | |
0d143fe1 | 348 | struct sta_info *sta; |
5061b0c2 JB |
349 | unsigned long flags; |
350 | struct sk_buff *skb, *tmp; | |
e8975581 | 351 | u32 hw_reconf_flags = 0; |
5061b0c2 | 352 | int i; |
0d143fe1 JB |
353 | |
354 | /* | |
355 | * Stop TX on this interface first. | |
356 | */ | |
53623f1a | 357 | netif_stop_queue(dev); |
0d143fe1 | 358 | |
af6b6374 JB |
359 | /* |
360 | * Purge work for this interface. | |
361 | */ | |
362 | ieee80211_work_purge(sdata); | |
363 | ||
0d143fe1 JB |
364 | /* |
365 | * Now delete all active aggregation sessions. | |
366 | */ | |
367 | rcu_read_lock(); | |
368 | ||
369 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
370 | if (sta->sdata == sdata) | |
2dace10e | 371 | ieee80211_sta_tear_down_BA_sessions(sta); |
0d143fe1 JB |
372 | } |
373 | ||
374 | rcu_read_unlock(); | |
375 | ||
376 | /* | |
377 | * Remove all stations associated with this interface. | |
378 | * | |
379 | * This must be done before calling ops->remove_interface() | |
380 | * because otherwise we can later invoke ops->sta_notify() | |
381 | * whenever the STAs are removed, and that invalidates driver | |
382 | * assumptions about always getting a vif pointer that is valid | |
383 | * (because if we remove a STA after ops->remove_interface() | |
384 | * the driver will have removed the vif info already!) | |
385 | * | |
386 | * We could relax this and only unlink the stations from the | |
387 | * hash table and list but keep them on a per-sdata list that | |
388 | * will be inserted back again when the interface is brought | |
389 | * up again, but I don't currently see a use case for that, | |
390 | * except with WDS which gets a STA entry created when it is | |
391 | * brought up. | |
392 | */ | |
393 | sta_info_flush(local, sdata); | |
394 | ||
395 | /* | |
396 | * Don't count this interface for promisc/allmulti while it | |
397 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
398 | * on the master interface which will sync these down to the | |
399 | * hardware as filter flags. | |
400 | */ | |
401 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
402 | atomic_dec(&local->iff_allmultis); | |
403 | ||
404 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
405 | atomic_dec(&local->iff_promiscs); | |
406 | ||
e3b90ca2 IP |
407 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
408 | local->fif_pspoll--; | |
409 | ||
3b8d81e0 JB |
410 | netif_addr_lock_bh(dev); |
411 | spin_lock_bh(&local->filter_lock); | |
412 | __dev_addr_unsync(&local->mc_list, &local->mc_count, | |
413 | &dev->mc_list, &dev->mc_count); | |
3b8d81e0 JB |
414 | spin_unlock_bh(&local->filter_lock); |
415 | netif_addr_unlock_bh(dev); | |
416 | ||
3ac64bee JB |
417 | ieee80211_configure_filter(local); |
418 | ||
7cbf0ba5 VN |
419 | del_timer_sync(&local->dynamic_ps_timer); |
420 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 JB |
421 | |
422 | /* APs need special treatment */ | |
423 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 424 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
425 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
426 | ||
427 | /* remove beacon */ | |
428 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
429 | synchronize_rcu(); | |
430 | kfree(old_beacon); | |
431 | ||
432 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 433 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
434 | u.vlan.list) |
435 | dev_close(vlan->dev); | |
436 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
437 | } | |
438 | ||
439 | local->open_count--; | |
440 | ||
441 | switch (sdata->vif.type) { | |
442 | case NL80211_IFTYPE_AP_VLAN: | |
443 | list_del(&sdata->u.vlan.list); | |
444 | /* no need to tell driver */ | |
445 | break; | |
446 | case NL80211_IFTYPE_MONITOR: | |
447 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
448 | local->cooked_mntrs--; | |
449 | break; | |
450 | } | |
451 | ||
452 | local->monitors--; | |
e8975581 | 453 | if (local->monitors == 0) { |
0869aea0 JB |
454 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
455 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 456 | } |
0d143fe1 JB |
457 | |
458 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
459 | local->fif_fcsfail--; | |
460 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
461 | local->fif_plcpfail--; | |
e3b90ca2 IP |
462 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
463 | local->fif_pspoll--; | |
0d143fe1 | 464 | local->fif_control--; |
e3b90ca2 | 465 | } |
0d143fe1 JB |
466 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
467 | local->fif_other_bss--; | |
468 | ||
0d143fe1 | 469 | ieee80211_configure_filter(local); |
0d143fe1 JB |
470 | break; |
471 | case NL80211_IFTYPE_STATION: | |
46900298 JB |
472 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
473 | del_timer_sync(&sdata->u.mgd.timer); | |
0e2b6286 JB |
474 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
475 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
0d143fe1 | 476 | /* |
0e2b6286 JB |
477 | * If any of the timers fired while we waited for it, it will |
478 | * have queued its work. Now the work will be running again | |
0d143fe1 JB |
479 | * but will not rearm the timer again because it checks |
480 | * whether the interface is running, which, at this point, | |
481 | * it no longer is. | |
482 | */ | |
46900298 JB |
483 | cancel_work_sync(&sdata->u.mgd.work); |
484 | cancel_work_sync(&sdata->u.mgd.chswitch_work); | |
0e2b6286 | 485 | cancel_work_sync(&sdata->u.mgd.monitor_work); |
04de8381 KV |
486 | cancel_work_sync(&sdata->u.mgd.beacon_loss_work); |
487 | ||
0d143fe1 JB |
488 | /* |
489 | * When we get here, the interface is marked down. | |
490 | * Call synchronize_rcu() to wait for the RX path | |
491 | * should it be using the interface and enqueuing | |
492 | * frames at this very time on another CPU. | |
493 | */ | |
494 | synchronize_rcu(); | |
46900298 | 495 | skb_queue_purge(&sdata->u.mgd.skb_queue); |
46900298 JB |
496 | /* fall through */ |
497 | case NL80211_IFTYPE_ADHOC: | |
498 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
46900298 JB |
499 | del_timer_sync(&sdata->u.ibss.timer); |
500 | cancel_work_sync(&sdata->u.ibss.work); | |
501 | synchronize_rcu(); | |
502 | skb_queue_purge(&sdata->u.ibss.skb_queue); | |
503 | } | |
0d143fe1 JB |
504 | /* fall through */ |
505 | case NL80211_IFTYPE_MESH_POINT: | |
506 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
507 | /* other_bss and allmulti are always set on mesh |
508 | * ifaces */ | |
509 | local->fif_other_bss--; | |
0d143fe1 | 510 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 | 511 | |
a3c9aa51 | 512 | ieee80211_configure_filter(local); |
a3c9aa51 | 513 | |
0d143fe1 JB |
514 | ieee80211_stop_mesh(sdata); |
515 | } | |
516 | /* fall through */ | |
517 | default: | |
15db0b7f JB |
518 | if (local->scan_sdata == sdata) |
519 | ieee80211_scan_cancel(local); | |
0d143fe1 | 520 | |
97af7432 BC |
521 | /* |
522 | * Disable beaconing for AP and mesh, IBSS can't | |
523 | * still be joined to a network at this point. | |
524 | */ | |
525 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
526 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { | |
527 | ieee80211_bss_info_change_notify(sdata, | |
528 | BSS_CHANGED_BEACON_ENABLED); | |
529 | } | |
530 | ||
0d143fe1 JB |
531 | /* disable all keys for as long as this netdev is down */ |
532 | ieee80211_disable_keys(sdata); | |
1ed32e4f | 533 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 JB |
534 | } |
535 | ||
536 | sdata->bss = NULL; | |
537 | ||
5cff20e6 JB |
538 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
539 | ||
540 | ieee80211_recalc_ps(local, -1); | |
541 | ||
0d143fe1 | 542 | if (local->open_count == 0) { |
ea77f12f | 543 | ieee80211_clear_tx_pending(local); |
84f6a01c | 544 | ieee80211_stop_device(local); |
0d143fe1 | 545 | |
e8975581 JB |
546 | /* no reconfiguring after stop! */ |
547 | hw_reconf_flags = 0; | |
0d143fe1 JB |
548 | } |
549 | ||
e8975581 JB |
550 | /* do after stop to avoid reconfiguring when we stop anyway */ |
551 | if (hw_reconf_flags) | |
552 | ieee80211_hw_config(local, hw_reconf_flags); | |
553 | ||
5061b0c2 JB |
554 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
555 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
556 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
557 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
558 | if (info->control.vif == &sdata->vif) { | |
559 | __skb_unlink(skb, &local->pending[i]); | |
560 | dev_kfree_skb_irq(skb); | |
561 | } | |
562 | } | |
563 | } | |
564 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
565 | ||
0d143fe1 JB |
566 | return 0; |
567 | } | |
568 | ||
569 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
570 | { | |
0d143fe1 | 571 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 572 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
573 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
574 | ||
575 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
576 | promisc = !!(dev->flags & IFF_PROMISC); | |
577 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
578 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
579 | ||
580 | if (allmulti != sdata_allmulti) { | |
581 | if (dev->flags & IFF_ALLMULTI) | |
582 | atomic_inc(&local->iff_allmultis); | |
583 | else | |
584 | atomic_dec(&local->iff_allmultis); | |
585 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
586 | } | |
587 | ||
588 | if (promisc != sdata_promisc) { | |
589 | if (dev->flags & IFF_PROMISC) | |
590 | atomic_inc(&local->iff_promiscs); | |
591 | else | |
592 | atomic_dec(&local->iff_promiscs); | |
593 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
594 | } | |
3b8d81e0 JB |
595 | spin_lock_bh(&local->filter_lock); |
596 | __dev_addr_sync(&local->mc_list, &local->mc_count, | |
597 | &dev->mc_list, &dev->mc_count); | |
3b8d81e0 | 598 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 599 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
600 | } |
601 | ||
75636525 JB |
602 | /* |
603 | * Called when the netdev is removed or, by the code below, before | |
604 | * the interface type changes. | |
605 | */ | |
606 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 607 | { |
75636525 JB |
608 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
609 | struct ieee80211_local *local = sdata->local; | |
610 | struct beacon_data *beacon; | |
611 | struct sk_buff *skb; | |
612 | int flushed; | |
f0706e82 JB |
613 | int i; |
614 | ||
75636525 JB |
615 | /* free extra data */ |
616 | ieee80211_free_keys(sdata); | |
617 | ||
aee14ceb JM |
618 | ieee80211_debugfs_remove_netdev(sdata); |
619 | ||
f0706e82 | 620 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
621 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
622 | sdata->fragment_next = 0; | |
11a843b7 | 623 | |
75636525 | 624 | switch (sdata->vif.type) { |
05c914fe | 625 | case NL80211_IFTYPE_AP: |
75636525 JB |
626 | beacon = sdata->u.ap.beacon; |
627 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
628 | synchronize_rcu(); | |
629 | kfree(beacon); | |
3e122be0 | 630 | |
75636525 JB |
631 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
632 | local->total_ps_buffered--; | |
633 | dev_kfree_skb(skb); | |
634 | } | |
635 | ||
636 | break; | |
05c914fe | 637 | case NL80211_IFTYPE_MESH_POINT: |
75636525 | 638 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 639 | mesh_rmc_free(sdata); |
472dbc45 | 640 | break; |
05c914fe | 641 | case NL80211_IFTYPE_ADHOC: |
af8cdcd8 JB |
642 | if (WARN_ON(sdata->u.ibss.presp)) |
643 | kfree_skb(sdata->u.ibss.presp); | |
46900298 JB |
644 | break; |
645 | case NL80211_IFTYPE_STATION: | |
05c914fe JB |
646 | case NL80211_IFTYPE_WDS: |
647 | case NL80211_IFTYPE_AP_VLAN: | |
648 | case NL80211_IFTYPE_MONITOR: | |
75636525 | 649 | break; |
05c914fe JB |
650 | case NL80211_IFTYPE_UNSPECIFIED: |
651 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
652 | BUG(); |
653 | break; | |
654 | } | |
655 | ||
656 | flushed = sta_info_flush(local, sdata); | |
657 | WARN_ON(flushed); | |
f0706e82 JB |
658 | } |
659 | ||
587e729e JB |
660 | static const struct net_device_ops ieee80211_dataif_ops = { |
661 | .ndo_open = ieee80211_open, | |
662 | .ndo_stop = ieee80211_stop, | |
663 | .ndo_uninit = ieee80211_teardown_sdata, | |
664 | .ndo_start_xmit = ieee80211_subif_start_xmit, | |
665 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
666 | .ndo_change_mtu = ieee80211_change_mtu, | |
47846c9b | 667 | .ndo_set_mac_address = ieee80211_change_mac, |
587e729e JB |
668 | }; |
669 | ||
670 | static const struct net_device_ops ieee80211_monitorif_ops = { | |
671 | .ndo_open = ieee80211_open, | |
672 | .ndo_stop = ieee80211_stop, | |
673 | .ndo_uninit = ieee80211_teardown_sdata, | |
674 | .ndo_start_xmit = ieee80211_monitor_start_xmit, | |
675 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
676 | .ndo_change_mtu = ieee80211_change_mtu, | |
677 | .ndo_set_mac_address = eth_mac_addr, | |
678 | }; | |
679 | ||
680 | static void ieee80211_if_setup(struct net_device *dev) | |
681 | { | |
682 | ether_setup(dev); | |
683 | dev->netdev_ops = &ieee80211_dataif_ops; | |
587e729e JB |
684 | dev->destructor = free_netdev; |
685 | } | |
686 | ||
75636525 JB |
687 | /* |
688 | * Helper function to initialise an interface to a specific type. | |
689 | */ | |
690 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 691 | enum nl80211_iftype type) |
f0706e82 | 692 | { |
75636525 JB |
693 | /* clear type-dependent union */ |
694 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
695 | ||
696 | /* and set some type-dependent values */ | |
697 | sdata->vif.type = type; | |
587e729e | 698 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
60719ffd | 699 | sdata->wdev.iftype = type; |
75636525 JB |
700 | |
701 | /* only monitor differs */ | |
702 | sdata->dev->type = ARPHRD_ETHER; | |
703 | ||
704 | switch (type) { | |
05c914fe | 705 | case NL80211_IFTYPE_AP: |
75636525 JB |
706 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
707 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
708 | break; | |
05c914fe | 709 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 710 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 711 | break; |
46900298 JB |
712 | case NL80211_IFTYPE_ADHOC: |
713 | ieee80211_ibss_setup_sdata(sdata); | |
714 | break; | |
05c914fe | 715 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
716 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
717 | ieee80211_mesh_init_sdata(sdata); | |
718 | break; | |
05c914fe | 719 | case NL80211_IFTYPE_MONITOR: |
75636525 | 720 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 721 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
722 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
723 | MONITOR_FLAG_OTHER_BSS; | |
724 | break; | |
05c914fe JB |
725 | case NL80211_IFTYPE_WDS: |
726 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 727 | break; |
05c914fe JB |
728 | case NL80211_IFTYPE_UNSPECIFIED: |
729 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
730 | BUG(); |
731 | break; | |
732 | } | |
733 | ||
734 | ieee80211_debugfs_add_netdev(sdata); | |
735 | } | |
736 | ||
f3947e2d | 737 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 738 | enum nl80211_iftype type) |
75636525 | 739 | { |
f3947e2d JB |
740 | ASSERT_RTNL(); |
741 | ||
742 | if (type == sdata->vif.type) | |
743 | return 0; | |
744 | ||
e60c7744 | 745 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
746 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
747 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
748 | return -EOPNOTSUPP; |
749 | ||
f3947e2d JB |
750 | /* |
751 | * We could, here, on changes between IBSS/STA/MESH modes, | |
752 | * invoke an MLME function instead that disassociates etc. | |
753 | * and goes into the requested mode. | |
754 | */ | |
755 | ||
9607e6b6 | 756 | if (ieee80211_sdata_running(sdata)) |
f3947e2d JB |
757 | return -EBUSY; |
758 | ||
75636525 JB |
759 | /* Purge and reset type-dependent state. */ |
760 | ieee80211_teardown_sdata(sdata->dev); | |
761 | ieee80211_setup_sdata(sdata, type); | |
762 | ||
763 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 764 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
765 | ieee80211_mandatory_rates(sdata->local, |
766 | sdata->local->hw.conf.channel->band); | |
75636525 | 767 | sdata->drop_unencrypted = 0; |
9bc383de JB |
768 | if (type == NL80211_IFTYPE_STATION) |
769 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
770 | |
771 | return 0; | |
f0706e82 JB |
772 | } |
773 | ||
3e122be0 | 774 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 775 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 776 | struct vif_params *params) |
f0706e82 JB |
777 | { |
778 | struct net_device *ndev; | |
f0706e82 | 779 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 780 | int ret, i; |
f0706e82 JB |
781 | |
782 | ASSERT_RTNL(); | |
75636525 | 783 | |
32bfd35d | 784 | ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, |
f0706e82 JB |
785 | name, ieee80211_if_setup); |
786 | if (!ndev) | |
787 | return -ENOMEM; | |
a272a720 | 788 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
f0706e82 | 789 | |
f3994ece JB |
790 | ndev->needed_headroom = local->tx_headroom + |
791 | 4*6 /* four MAC addresses */ | |
792 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
793 | + 6 /* mesh */ | |
794 | + 8 /* rfc1042/bridge tunnel */ | |
795 | - ETH_HLEN /* ethernet hard_header_len */ | |
796 | + IEEE80211_ENCRYPT_HEADROOM; | |
797 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
798 | ||
f0706e82 JB |
799 | ret = dev_alloc_name(ndev, ndev->name); |
800 | if (ret < 0) | |
801 | goto fail; | |
802 | ||
803 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
0adc23f5 | 804 | memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN); |
f0706e82 JB |
805 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
806 | ||
3e122be0 JB |
807 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
808 | sdata = netdev_priv(ndev); | |
f0706e82 | 809 | ndev->ieee80211_ptr = &sdata->wdev; |
47846c9b JB |
810 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
811 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
75636525 JB |
812 | |
813 | /* initialise type-independent data */ | |
f0706e82 | 814 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 815 | sdata->local = local; |
75636525 JB |
816 | sdata->dev = ndev; |
817 | ||
818 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
819 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
820 | ||
821 | INIT_LIST_HEAD(&sdata->key_list); | |
822 | ||
823 | sdata->force_unicast_rateidx = -1; | |
824 | sdata->max_ratectrl_rateidx = -1; | |
825 | ||
826 | /* setup type-dependent data */ | |
827 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 828 | |
9bc383de JB |
829 | if (params) { |
830 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
831 | if (type == NL80211_IFTYPE_STATION) | |
832 | sdata->u.mgd.use_4addr = params->use_4addr; | |
833 | } | |
834 | ||
f0706e82 JB |
835 | ret = register_netdevice(ndev); |
836 | if (ret) | |
837 | goto fail; | |
838 | ||
902acc78 JB |
839 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
840 | params && params->mesh_id_len) | |
472dbc45 JB |
841 | ieee80211_sdata_set_mesh_id(sdata, |
842 | params->mesh_id_len, | |
843 | params->mesh_id); | |
ee385855 | 844 | |
c771c9d8 | 845 | mutex_lock(&local->iflist_mtx); |
79010420 | 846 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 847 | mutex_unlock(&local->iflist_mtx); |
79010420 | 848 | |
f0706e82 JB |
849 | if (new_dev) |
850 | *new_dev = ndev; | |
f0706e82 | 851 | |
f0706e82 JB |
852 | return 0; |
853 | ||
75636525 | 854 | fail: |
f0706e82 JB |
855 | free_netdev(ndev); |
856 | return ret; | |
857 | } | |
858 | ||
f698d856 | 859 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 860 | { |
f0706e82 | 861 | ASSERT_RTNL(); |
11a843b7 | 862 | |
c771c9d8 | 863 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 864 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
865 | mutex_unlock(&sdata->local->iflist_mtx); |
866 | ||
75636525 | 867 | synchronize_rcu(); |
f698d856 | 868 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
869 | } |
870 | ||
75636525 JB |
871 | /* |
872 | * Remove all interfaces, may only be called at hardware unregistration | |
873 | * time because it doesn't do RCU-safe list removals. | |
874 | */ | |
875 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 876 | { |
75636525 | 877 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 878 | LIST_HEAD(unreg_list); |
f0706e82 JB |
879 | |
880 | ASSERT_RTNL(); | |
881 | ||
efe117ab | 882 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
883 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
884 | list_del(&sdata->list); | |
c771c9d8 | 885 | |
efe117ab | 886 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
f0706e82 | 887 | } |
efe117ab ED |
888 | mutex_unlock(&local->iflist_mtx); |
889 | unregister_netdevice_many(&unreg_list); | |
f0706e82 | 890 | } |
5cff20e6 JB |
891 | |
892 | static u32 ieee80211_idle_off(struct ieee80211_local *local, | |
893 | const char *reason) | |
894 | { | |
895 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
896 | return 0; | |
897 | ||
898 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
899 | printk(KERN_DEBUG "%s: device no longer idle - %s\n", | |
900 | wiphy_name(local->hw.wiphy), reason); | |
901 | #endif | |
902 | ||
903 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
904 | return IEEE80211_CONF_CHANGE_IDLE; | |
905 | } | |
906 | ||
907 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
908 | { | |
909 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
910 | return 0; | |
911 | ||
912 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
913 | printk(KERN_DEBUG "%s: device now idle\n", | |
914 | wiphy_name(local->hw.wiphy)); | |
915 | #endif | |
916 | ||
a80f7c0b JB |
917 | drv_flush(local, false); |
918 | ||
5cff20e6 JB |
919 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
920 | return IEEE80211_CONF_CHANGE_IDLE; | |
921 | } | |
922 | ||
923 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
924 | { | |
925 | struct ieee80211_sub_if_data *sdata; | |
926 | int count = 0; | |
927 | ||
af6b6374 JB |
928 | if (!list_empty(&local->work_list)) |
929 | return ieee80211_idle_off(local, "working"); | |
930 | ||
fbe9c429 | 931 | if (local->scanning) |
5cff20e6 JB |
932 | return ieee80211_idle_off(local, "scanning"); |
933 | ||
934 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 935 | if (!ieee80211_sdata_running(sdata)) |
5cff20e6 JB |
936 | continue; |
937 | /* do not count disabled managed interfaces */ | |
938 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
af6b6374 | 939 | !sdata->u.mgd.associated) |
5cff20e6 JB |
940 | continue; |
941 | /* do not count unused IBSS interfaces */ | |
942 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
943 | !sdata->u.ibss.ssid_len) | |
944 | continue; | |
945 | /* count everything else */ | |
946 | count++; | |
947 | } | |
948 | ||
949 | if (!count) | |
950 | return ieee80211_idle_on(local); | |
951 | else | |
952 | return ieee80211_idle_off(local, "in use"); | |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
957 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
958 | { | |
959 | u32 chg; | |
960 | ||
961 | mutex_lock(&local->iflist_mtx); | |
962 | chg = __ieee80211_recalc_idle(local); | |
963 | mutex_unlock(&local->iflist_mtx); | |
58905ca5 JB |
964 | if (chg) |
965 | ieee80211_hw_config(local, chg); | |
5cff20e6 | 966 | } |
47846c9b JB |
967 | |
968 | static int netdev_notify(struct notifier_block *nb, | |
969 | unsigned long state, | |
970 | void *ndev) | |
971 | { | |
972 | struct net_device *dev = ndev; | |
973 | struct ieee80211_sub_if_data *sdata; | |
974 | ||
975 | if (state != NETDEV_CHANGENAME) | |
976 | return 0; | |
977 | ||
978 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
979 | return 0; | |
980 | ||
981 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
982 | return 0; | |
983 | ||
984 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
985 | ||
986 | memcpy(sdata->name, sdata->name, IFNAMSIZ); | |
987 | ||
988 | ieee80211_debugfs_rename_netdev(sdata); | |
989 | return 0; | |
990 | } | |
991 | ||
992 | static struct notifier_block mac80211_netdev_notifier = { | |
993 | .notifier_call = netdev_notify, | |
994 | }; | |
995 | ||
996 | int ieee80211_iface_init(void) | |
997 | { | |
998 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
999 | } | |
1000 | ||
1001 | void ieee80211_iface_exit(void) | |
1002 | { | |
1003 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1004 | } |