]>
Commit | Line | Data |
---|---|---|
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 JB |
22 | #include "led.h" |
23 | ||
24 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) | |
25 | { | |
26 | int meshhdrlen; | |
27 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
28 | ||
29 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
30 | ||
31 | /* FIX: what would be proper limits for MTU? | |
32 | * This interface uses 802.3 frames. */ | |
33 | if (new_mtu < 256 || | |
34 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
35 | return -EINVAL; | |
36 | } | |
37 | ||
38 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
39 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
40 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
41 | dev->mtu = new_mtu; | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static inline int identical_mac_addr_allowed(int type1, int type2) | |
46 | { | |
47 | return type1 == NL80211_IFTYPE_MONITOR || | |
48 | type2 == NL80211_IFTYPE_MONITOR || | |
49 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || | |
50 | (type1 == NL80211_IFTYPE_WDS && | |
51 | (type2 == NL80211_IFTYPE_WDS || | |
52 | type2 == NL80211_IFTYPE_AP)) || | |
53 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
54 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
55 | (type2 == NL80211_IFTYPE_AP || | |
56 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
57 | } | |
58 | ||
59 | static int ieee80211_open(struct net_device *dev) | |
60 | { | |
b4a4bf5d JB |
61 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
62 | struct ieee80211_sub_if_data *nsdata; | |
63 | struct ieee80211_local *local = sdata->local; | |
0d143fe1 JB |
64 | struct sta_info *sta; |
65 | struct ieee80211_if_init_conf conf; | |
66 | u32 changed = 0; | |
67 | int res; | |
e8975581 | 68 | u32 hw_reconf_flags = 0; |
0d143fe1 JB |
69 | u8 null_addr[ETH_ALEN] = {0}; |
70 | ||
0d143fe1 JB |
71 | /* fail early if user set an invalid address */ |
72 | if (compare_ether_addr(dev->dev_addr, null_addr) && | |
73 | !is_valid_ether_addr(dev->dev_addr)) | |
74 | return -EADDRNOTAVAIL; | |
75 | ||
76 | /* we hold the RTNL here so can safely walk the list */ | |
77 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
78 | struct net_device *ndev = nsdata->dev; | |
79 | ||
80 | if (ndev != dev && netif_running(ndev)) { | |
81 | /* | |
82 | * Allow only a single IBSS interface to be up at any | |
83 | * time. This is restricted because beacon distribution | |
84 | * cannot work properly if both are in the same IBSS. | |
85 | * | |
86 | * To remove this restriction we'd have to disallow them | |
87 | * from setting the same SSID on different IBSS interfaces | |
88 | * belonging to the same hardware. Then, however, we're | |
89 | * faced with having to adopt two different TSF timers... | |
90 | */ | |
91 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
92 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) | |
93 | return -EBUSY; | |
94 | ||
95 | /* | |
96 | * The remaining checks are only performed for interfaces | |
97 | * with the same MAC address. | |
98 | */ | |
99 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
100 | continue; | |
101 | ||
102 | /* | |
103 | * check whether it may have the same address | |
104 | */ | |
105 | if (!identical_mac_addr_allowed(sdata->vif.type, | |
106 | nsdata->vif.type)) | |
107 | return -ENOTUNIQ; | |
108 | ||
109 | /* | |
110 | * can only add VLANs to enabled APs | |
111 | */ | |
112 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
113 | nsdata->vif.type == NL80211_IFTYPE_AP) | |
114 | sdata->bss = &nsdata->u.ap; | |
115 | } | |
116 | } | |
117 | ||
118 | switch (sdata->vif.type) { | |
119 | case NL80211_IFTYPE_WDS: | |
120 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
121 | return -ENOLINK; | |
122 | break; | |
123 | case NL80211_IFTYPE_AP_VLAN: | |
124 | if (!sdata->bss) | |
125 | return -ENOLINK; | |
126 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); | |
127 | break; | |
128 | case NL80211_IFTYPE_AP: | |
129 | sdata->bss = &sdata->u.ap; | |
130 | break; | |
131 | case NL80211_IFTYPE_MESH_POINT: | |
132 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
133 | break; | |
134 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
135 | atomic_inc(&local->iff_allmultis); | |
136 | break; | |
137 | case NL80211_IFTYPE_STATION: | |
138 | case NL80211_IFTYPE_MONITOR: | |
139 | case NL80211_IFTYPE_ADHOC: | |
140 | /* no special treatment */ | |
141 | break; | |
142 | case NL80211_IFTYPE_UNSPECIFIED: | |
143 | case __NL80211_IFTYPE_AFTER_LAST: | |
144 | /* cannot happen */ | |
145 | WARN_ON(1); | |
146 | break; | |
147 | } | |
148 | ||
149 | if (local->open_count == 0) { | |
150 | res = 0; | |
151 | if (local->ops->start) | |
152 | res = local->ops->start(local_to_hw(local)); | |
153 | if (res) | |
154 | goto err_del_bss; | |
e8975581 JB |
155 | /* we're brought up, everything changes */ |
156 | hw_reconf_flags = ~0; | |
0d143fe1 JB |
157 | ieee80211_led_radio(local, local->hw.conf.radio_enabled); |
158 | } | |
159 | ||
160 | /* | |
161 | * Check all interfaces and copy the hopefully now-present | |
162 | * MAC address to those that have the special null one. | |
163 | */ | |
164 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
165 | struct net_device *ndev = nsdata->dev; | |
166 | ||
167 | /* | |
168 | * No need to check netif_running since we do not allow | |
169 | * it to start up with this invalid address. | |
170 | */ | |
171 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) | |
172 | memcpy(ndev->dev_addr, | |
173 | local->hw.wiphy->perm_addr, | |
174 | ETH_ALEN); | |
175 | } | |
176 | ||
177 | if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0) | |
178 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, | |
179 | ETH_ALEN); | |
180 | ||
181 | /* | |
182 | * Validate the MAC address for this device. | |
183 | */ | |
184 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
185 | if (!local->open_count && local->ops->stop) | |
186 | local->ops->stop(local_to_hw(local)); | |
187 | return -EADDRNOTAVAIL; | |
188 | } | |
189 | ||
190 | switch (sdata->vif.type) { | |
191 | case NL80211_IFTYPE_AP_VLAN: | |
192 | /* no need to tell driver */ | |
193 | break; | |
194 | case NL80211_IFTYPE_MONITOR: | |
195 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
196 | local->cooked_mntrs++; | |
197 | break; | |
198 | } | |
199 | ||
200 | /* must be before the call to ieee80211_configure_filter */ | |
201 | local->monitors++; | |
e8975581 | 202 | if (local->monitors == 1) { |
0d143fe1 | 203 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
e8975581 JB |
204 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP; |
205 | } | |
0d143fe1 JB |
206 | |
207 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
208 | local->fif_fcsfail++; | |
209 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
210 | local->fif_plcpfail++; | |
211 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
212 | local->fif_control++; | |
213 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
214 | local->fif_other_bss++; | |
215 | ||
216 | netif_addr_lock_bh(local->mdev); | |
217 | ieee80211_configure_filter(local); | |
218 | netif_addr_unlock_bh(local->mdev); | |
219 | break; | |
220 | case NL80211_IFTYPE_STATION: | |
221 | case NL80211_IFTYPE_ADHOC: | |
222 | sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
223 | /* fall through */ | |
224 | default: | |
225 | conf.vif = &sdata->vif; | |
226 | conf.type = sdata->vif.type; | |
227 | conf.mac_addr = dev->dev_addr; | |
228 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
229 | if (res) | |
230 | goto err_stop; | |
231 | ||
a3c9aa51 AY |
232 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
233 | local->fif_other_bss++; | |
234 | netif_addr_lock_bh(local->mdev); | |
235 | ieee80211_configure_filter(local); | |
236 | netif_addr_unlock_bh(local->mdev); | |
237 | ||
0d143fe1 | 238 | ieee80211_start_mesh(sdata); |
a3c9aa51 | 239 | } |
0d143fe1 JB |
240 | changed |= ieee80211_reset_erp_info(sdata); |
241 | ieee80211_bss_info_change_notify(sdata, changed); | |
242 | ieee80211_enable_keys(sdata); | |
243 | ||
244 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
245 | !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) | |
246 | netif_carrier_off(dev); | |
247 | else | |
248 | netif_carrier_on(dev); | |
249 | } | |
250 | ||
251 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { | |
252 | /* Create STA entry for the WDS peer */ | |
253 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
254 | GFP_KERNEL); | |
255 | if (!sta) { | |
256 | res = -ENOMEM; | |
257 | goto err_del_interface; | |
258 | } | |
259 | ||
260 | /* no locking required since STA is not live yet */ | |
261 | sta->flags |= WLAN_STA_AUTHORIZED; | |
262 | ||
263 | res = sta_info_insert(sta); | |
264 | if (res) { | |
265 | /* STA has been freed */ | |
266 | goto err_del_interface; | |
267 | } | |
268 | } | |
269 | ||
270 | if (local->open_count == 0) { | |
271 | res = dev_open(local->mdev); | |
272 | WARN_ON(res); | |
273 | if (res) | |
274 | goto err_del_interface; | |
275 | tasklet_enable(&local->tx_pending_tasklet); | |
276 | tasklet_enable(&local->tasklet); | |
277 | } | |
278 | ||
279 | /* | |
280 | * set_multicast_list will be invoked by the networking core | |
281 | * which will check whether any increments here were done in | |
282 | * error and sync them down to the hardware as filter flags. | |
283 | */ | |
284 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
285 | atomic_inc(&local->iff_allmultis); | |
286 | ||
287 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
288 | atomic_inc(&local->iff_promiscs); | |
289 | ||
290 | local->open_count++; | |
e8975581 JB |
291 | if (hw_reconf_flags) { |
292 | ieee80211_hw_config(local, hw_reconf_flags); | |
0d143fe1 JB |
293 | /* |
294 | * set default queue parameters so drivers don't | |
295 | * need to initialise the hardware if the hardware | |
296 | * doesn't start up with sane defaults | |
297 | */ | |
298 | ieee80211_set_wmm_default(sdata); | |
299 | } | |
300 | ||
301 | /* | |
302 | * ieee80211_sta_work is disabled while network interface | |
303 | * is down. Therefore, some configuration changes may not | |
304 | * yet be effective. Trigger execution of ieee80211_sta_work | |
305 | * to fix this. | |
306 | */ | |
307 | if (sdata->vif.type == NL80211_IFTYPE_STATION || | |
308 | sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
309 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
310 | queue_work(local->hw.workqueue, &ifsta->work); | |
311 | } | |
f0706e82 | 312 | |
0d143fe1 JB |
313 | netif_tx_start_all_queues(dev); |
314 | ||
315 | return 0; | |
316 | err_del_interface: | |
317 | local->ops->remove_interface(local_to_hw(local), &conf); | |
318 | err_stop: | |
319 | if (!local->open_count && local->ops->stop) | |
320 | local->ops->stop(local_to_hw(local)); | |
321 | err_del_bss: | |
322 | sdata->bss = NULL; | |
323 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
324 | list_del(&sdata->u.vlan.list); | |
325 | return res; | |
326 | } | |
327 | ||
328 | static int ieee80211_stop(struct net_device *dev) | |
329 | { | |
330 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
331 | struct ieee80211_local *local = sdata->local; | |
332 | struct ieee80211_if_init_conf conf; | |
333 | struct sta_info *sta; | |
e8975581 | 334 | u32 hw_reconf_flags = 0; |
0d143fe1 JB |
335 | |
336 | /* | |
337 | * Stop TX on this interface first. | |
338 | */ | |
339 | netif_tx_stop_all_queues(dev); | |
340 | ||
341 | /* | |
342 | * Now delete all active aggregation sessions. | |
343 | */ | |
344 | rcu_read_lock(); | |
345 | ||
346 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
347 | if (sta->sdata == sdata) | |
17741cdc JB |
348 | ieee80211_sta_tear_down_BA_sessions(sdata, |
349 | sta->sta.addr); | |
0d143fe1 JB |
350 | } |
351 | ||
352 | rcu_read_unlock(); | |
353 | ||
354 | /* | |
355 | * Remove all stations associated with this interface. | |
356 | * | |
357 | * This must be done before calling ops->remove_interface() | |
358 | * because otherwise we can later invoke ops->sta_notify() | |
359 | * whenever the STAs are removed, and that invalidates driver | |
360 | * assumptions about always getting a vif pointer that is valid | |
361 | * (because if we remove a STA after ops->remove_interface() | |
362 | * the driver will have removed the vif info already!) | |
363 | * | |
364 | * We could relax this and only unlink the stations from the | |
365 | * hash table and list but keep them on a per-sdata list that | |
366 | * will be inserted back again when the interface is brought | |
367 | * up again, but I don't currently see a use case for that, | |
368 | * except with WDS which gets a STA entry created when it is | |
369 | * brought up. | |
370 | */ | |
371 | sta_info_flush(local, sdata); | |
372 | ||
373 | /* | |
374 | * Don't count this interface for promisc/allmulti while it | |
375 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
376 | * on the master interface which will sync these down to the | |
377 | * hardware as filter flags. | |
378 | */ | |
379 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
380 | atomic_dec(&local->iff_allmultis); | |
381 | ||
382 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
383 | atomic_dec(&local->iff_promiscs); | |
384 | ||
385 | dev_mc_unsync(local->mdev, dev); | |
386 | ||
387 | /* APs need special treatment */ | |
388 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
389 | struct ieee80211_sub_if_data *vlan, *tmp; | |
390 | struct beacon_data *old_beacon = sdata->u.ap.beacon; | |
391 | ||
392 | /* remove beacon */ | |
393 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
394 | synchronize_rcu(); | |
395 | kfree(old_beacon); | |
396 | ||
397 | /* down all dependent devices, that is VLANs */ | |
398 | list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, | |
399 | u.vlan.list) | |
400 | dev_close(vlan->dev); | |
401 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
402 | } | |
403 | ||
404 | local->open_count--; | |
405 | ||
406 | switch (sdata->vif.type) { | |
407 | case NL80211_IFTYPE_AP_VLAN: | |
408 | list_del(&sdata->u.vlan.list); | |
409 | /* no need to tell driver */ | |
410 | break; | |
411 | case NL80211_IFTYPE_MONITOR: | |
412 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
413 | local->cooked_mntrs--; | |
414 | break; | |
415 | } | |
416 | ||
417 | local->monitors--; | |
e8975581 | 418 | if (local->monitors == 0) { |
0d143fe1 | 419 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
e8975581 JB |
420 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP; |
421 | } | |
0d143fe1 JB |
422 | |
423 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
424 | local->fif_fcsfail--; | |
425 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
426 | local->fif_plcpfail--; | |
427 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
428 | local->fif_control--; | |
429 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
430 | local->fif_other_bss--; | |
431 | ||
432 | netif_addr_lock_bh(local->mdev); | |
433 | ieee80211_configure_filter(local); | |
434 | netif_addr_unlock_bh(local->mdev); | |
435 | break; | |
436 | case NL80211_IFTYPE_STATION: | |
437 | case NL80211_IFTYPE_ADHOC: | |
e327b847 JL |
438 | /* Announce that we are leaving the network. */ |
439 | if (sdata->u.sta.state != IEEE80211_STA_MLME_DISABLED) | |
440 | ieee80211_sta_deauthenticate(sdata, | |
441 | WLAN_REASON_DEAUTH_LEAVING); | |
442 | ||
0d143fe1 JB |
443 | memset(sdata->u.sta.bssid, 0, ETH_ALEN); |
444 | del_timer_sync(&sdata->u.sta.timer); | |
445 | /* | |
446 | * If the timer fired while we waited for it, it will have | |
447 | * requeued the work. Now the work will be running again | |
448 | * but will not rearm the timer again because it checks | |
449 | * whether the interface is running, which, at this point, | |
450 | * it no longer is. | |
451 | */ | |
452 | cancel_work_sync(&sdata->u.sta.work); | |
453 | /* | |
454 | * When we get here, the interface is marked down. | |
455 | * Call synchronize_rcu() to wait for the RX path | |
456 | * should it be using the interface and enqueuing | |
457 | * frames at this very time on another CPU. | |
458 | */ | |
459 | synchronize_rcu(); | |
460 | skb_queue_purge(&sdata->u.sta.skb_queue); | |
461 | ||
462 | sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED; | |
463 | kfree(sdata->u.sta.extra_ie); | |
464 | sdata->u.sta.extra_ie = NULL; | |
465 | sdata->u.sta.extra_ie_len = 0; | |
466 | /* fall through */ | |
467 | case NL80211_IFTYPE_MESH_POINT: | |
468 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
469 | /* other_bss and allmulti are always set on mesh |
470 | * ifaces */ | |
471 | local->fif_other_bss--; | |
0d143fe1 | 472 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 AY |
473 | |
474 | netif_addr_lock_bh(local->mdev); | |
475 | ieee80211_configure_filter(local); | |
476 | netif_addr_unlock_bh(local->mdev); | |
477 | ||
0d143fe1 JB |
478 | ieee80211_stop_mesh(sdata); |
479 | } | |
480 | /* fall through */ | |
481 | default: | |
482 | if (local->scan_sdata == sdata) { | |
483 | if (!local->ops->hw_scan) | |
484 | cancel_delayed_work_sync(&local->scan_work); | |
485 | /* | |
486 | * The software scan can no longer run now, so we can | |
487 | * clear out the scan_sdata reference. However, the | |
488 | * hardware scan may still be running. The complete | |
489 | * function must be prepared to handle a NULL value. | |
490 | */ | |
491 | local->scan_sdata = NULL; | |
492 | /* | |
493 | * The memory barrier guarantees that another CPU | |
494 | * that is hardware-scanning will now see the fact | |
495 | * that this interface is gone. | |
496 | */ | |
497 | smp_mb(); | |
498 | /* | |
499 | * If software scanning, complete the scan but since | |
500 | * the scan_sdata is NULL already don't send out a | |
501 | * scan event to userspace -- the scan is incomplete. | |
502 | */ | |
503 | if (local->sw_scanning) | |
504 | ieee80211_scan_completed(&local->hw); | |
505 | } | |
506 | ||
507 | conf.vif = &sdata->vif; | |
508 | conf.type = sdata->vif.type; | |
509 | conf.mac_addr = dev->dev_addr; | |
510 | /* disable all keys for as long as this netdev is down */ | |
511 | ieee80211_disable_keys(sdata); | |
512 | local->ops->remove_interface(local_to_hw(local), &conf); | |
513 | } | |
514 | ||
515 | sdata->bss = NULL; | |
516 | ||
517 | if (local->open_count == 0) { | |
518 | if (netif_running(local->mdev)) | |
519 | dev_close(local->mdev); | |
520 | ||
521 | if (local->ops->stop) | |
522 | local->ops->stop(local_to_hw(local)); | |
523 | ||
524 | ieee80211_led_radio(local, 0); | |
525 | ||
526 | flush_workqueue(local->hw.workqueue); | |
527 | ||
528 | tasklet_disable(&local->tx_pending_tasklet); | |
529 | tasklet_disable(&local->tasklet); | |
e8975581 JB |
530 | |
531 | /* no reconfiguring after stop! */ | |
532 | hw_reconf_flags = 0; | |
0d143fe1 JB |
533 | } |
534 | ||
e8975581 JB |
535 | /* do after stop to avoid reconfiguring when we stop anyway */ |
536 | if (hw_reconf_flags) | |
537 | ieee80211_hw_config(local, hw_reconf_flags); | |
538 | ||
0d143fe1 JB |
539 | return 0; |
540 | } | |
541 | ||
542 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
543 | { | |
0d143fe1 | 544 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 545 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
546 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
547 | ||
548 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
549 | promisc = !!(dev->flags & IFF_PROMISC); | |
550 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
551 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
552 | ||
553 | if (allmulti != sdata_allmulti) { | |
554 | if (dev->flags & IFF_ALLMULTI) | |
555 | atomic_inc(&local->iff_allmultis); | |
556 | else | |
557 | atomic_dec(&local->iff_allmultis); | |
558 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
559 | } | |
560 | ||
561 | if (promisc != sdata_promisc) { | |
562 | if (dev->flags & IFF_PROMISC) | |
563 | atomic_inc(&local->iff_promiscs); | |
564 | else | |
565 | atomic_dec(&local->iff_promiscs); | |
566 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
567 | } | |
568 | ||
569 | dev_mc_sync(local->mdev, dev); | |
570 | } | |
571 | ||
572 | static void ieee80211_if_setup(struct net_device *dev) | |
573 | { | |
574 | ether_setup(dev); | |
575 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
576 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
577 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
578 | dev->change_mtu = ieee80211_change_mtu; | |
579 | dev->open = ieee80211_open; | |
580 | dev->stop = ieee80211_stop; | |
581 | dev->destructor = free_netdev; | |
582 | /* we will validate the address ourselves in ->open */ | |
583 | dev->validate_addr = NULL; | |
584 | } | |
75636525 JB |
585 | /* |
586 | * Called when the netdev is removed or, by the code below, before | |
587 | * the interface type changes. | |
588 | */ | |
589 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 590 | { |
75636525 JB |
591 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
592 | struct ieee80211_local *local = sdata->local; | |
593 | struct beacon_data *beacon; | |
594 | struct sk_buff *skb; | |
595 | int flushed; | |
f0706e82 JB |
596 | int i; |
597 | ||
75636525 JB |
598 | /* free extra data */ |
599 | ieee80211_free_keys(sdata); | |
600 | ||
aee14ceb JM |
601 | ieee80211_debugfs_remove_netdev(sdata); |
602 | ||
f0706e82 | 603 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
604 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
605 | sdata->fragment_next = 0; | |
11a843b7 | 606 | |
75636525 | 607 | switch (sdata->vif.type) { |
05c914fe | 608 | case NL80211_IFTYPE_AP: |
75636525 JB |
609 | beacon = sdata->u.ap.beacon; |
610 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
611 | synchronize_rcu(); | |
612 | kfree(beacon); | |
3e122be0 | 613 | |
75636525 JB |
614 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
615 | local->total_ps_buffered--; | |
616 | dev_kfree_skb(skb); | |
617 | } | |
618 | ||
619 | break; | |
05c914fe | 620 | case NL80211_IFTYPE_MESH_POINT: |
75636525 | 621 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 622 | mesh_rmc_free(sdata); |
472dbc45 | 623 | break; |
05c914fe JB |
624 | case NL80211_IFTYPE_STATION: |
625 | case NL80211_IFTYPE_ADHOC: | |
75636525 JB |
626 | kfree(sdata->u.sta.extra_ie); |
627 | kfree(sdata->u.sta.assocreq_ies); | |
628 | kfree(sdata->u.sta.assocresp_ies); | |
629 | kfree_skb(sdata->u.sta.probe_resp); | |
630 | break; | |
05c914fe JB |
631 | case NL80211_IFTYPE_WDS: |
632 | case NL80211_IFTYPE_AP_VLAN: | |
633 | case NL80211_IFTYPE_MONITOR: | |
75636525 | 634 | break; |
05c914fe JB |
635 | case NL80211_IFTYPE_UNSPECIFIED: |
636 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
637 | BUG(); |
638 | break; | |
639 | } | |
640 | ||
641 | flushed = sta_info_flush(local, sdata); | |
642 | WARN_ON(flushed); | |
f0706e82 JB |
643 | } |
644 | ||
75636525 JB |
645 | /* |
646 | * Helper function to initialise an interface to a specific type. | |
647 | */ | |
648 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 649 | enum nl80211_iftype type) |
f0706e82 | 650 | { |
75636525 JB |
651 | /* clear type-dependent union */ |
652 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
653 | ||
654 | /* and set some type-dependent values */ | |
655 | sdata->vif.type = type; | |
e16ce63c | 656 | sdata->dev->hard_start_xmit = ieee80211_subif_start_xmit; |
60719ffd | 657 | sdata->wdev.iftype = type; |
75636525 JB |
658 | |
659 | /* only monitor differs */ | |
660 | sdata->dev->type = ARPHRD_ETHER; | |
661 | ||
662 | switch (type) { | |
05c914fe | 663 | case NL80211_IFTYPE_AP: |
75636525 JB |
664 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
665 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
666 | break; | |
05c914fe JB |
667 | case NL80211_IFTYPE_STATION: |
668 | case NL80211_IFTYPE_ADHOC: | |
9c6bd790 | 669 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 670 | break; |
05c914fe | 671 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
672 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
673 | ieee80211_mesh_init_sdata(sdata); | |
674 | break; | |
05c914fe | 675 | case NL80211_IFTYPE_MONITOR: |
75636525 JB |
676 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
677 | sdata->dev->hard_start_xmit = ieee80211_monitor_start_xmit; | |
678 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | | |
679 | MONITOR_FLAG_OTHER_BSS; | |
680 | break; | |
05c914fe JB |
681 | case NL80211_IFTYPE_WDS: |
682 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 683 | break; |
05c914fe JB |
684 | case NL80211_IFTYPE_UNSPECIFIED: |
685 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
686 | BUG(); |
687 | break; | |
688 | } | |
689 | ||
690 | ieee80211_debugfs_add_netdev(sdata); | |
691 | } | |
692 | ||
f3947e2d | 693 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 694 | enum nl80211_iftype type) |
75636525 | 695 | { |
f3947e2d JB |
696 | ASSERT_RTNL(); |
697 | ||
698 | if (type == sdata->vif.type) | |
699 | return 0; | |
700 | ||
e60c7744 | 701 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
702 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
703 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
704 | return -EOPNOTSUPP; |
705 | ||
f3947e2d JB |
706 | /* |
707 | * We could, here, on changes between IBSS/STA/MESH modes, | |
708 | * invoke an MLME function instead that disassociates etc. | |
709 | * and goes into the requested mode. | |
710 | */ | |
711 | ||
712 | if (netif_running(sdata->dev)) | |
713 | return -EBUSY; | |
714 | ||
75636525 JB |
715 | /* Purge and reset type-dependent state. */ |
716 | ieee80211_teardown_sdata(sdata->dev); | |
717 | ieee80211_setup_sdata(sdata, type); | |
718 | ||
719 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 720 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
721 | ieee80211_mandatory_rates(sdata->local, |
722 | sdata->local->hw.conf.channel->band); | |
75636525 | 723 | sdata->drop_unencrypted = 0; |
f3947e2d JB |
724 | |
725 | return 0; | |
f0706e82 JB |
726 | } |
727 | ||
3e122be0 | 728 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 729 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 730 | struct vif_params *params) |
f0706e82 JB |
731 | { |
732 | struct net_device *ndev; | |
f0706e82 | 733 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 734 | int ret, i; |
f0706e82 JB |
735 | |
736 | ASSERT_RTNL(); | |
75636525 | 737 | |
32bfd35d | 738 | ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, |
f0706e82 JB |
739 | name, ieee80211_if_setup); |
740 | if (!ndev) | |
741 | return -ENOMEM; | |
742 | ||
f3994ece JB |
743 | ndev->needed_headroom = local->tx_headroom + |
744 | 4*6 /* four MAC addresses */ | |
745 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
746 | + 6 /* mesh */ | |
747 | + 8 /* rfc1042/bridge tunnel */ | |
748 | - ETH_HLEN /* ethernet hard_header_len */ | |
749 | + IEEE80211_ENCRYPT_HEADROOM; | |
750 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
751 | ||
f0706e82 JB |
752 | ret = dev_alloc_name(ndev, ndev->name); |
753 | if (ret < 0) | |
754 | goto fail; | |
755 | ||
756 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
f0706e82 JB |
757 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
758 | ||
3e122be0 JB |
759 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
760 | sdata = netdev_priv(ndev); | |
f0706e82 | 761 | ndev->ieee80211_ptr = &sdata->wdev; |
75636525 JB |
762 | |
763 | /* initialise type-independent data */ | |
f0706e82 | 764 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 765 | sdata->local = local; |
75636525 JB |
766 | sdata->dev = ndev; |
767 | ||
768 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
769 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
770 | ||
771 | INIT_LIST_HEAD(&sdata->key_list); | |
772 | ||
773 | sdata->force_unicast_rateidx = -1; | |
774 | sdata->max_ratectrl_rateidx = -1; | |
775 | ||
776 | /* setup type-dependent data */ | |
777 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 JB |
778 | |
779 | ret = register_netdevice(ndev); | |
780 | if (ret) | |
781 | goto fail; | |
782 | ||
75636525 | 783 | ndev->uninit = ieee80211_teardown_sdata; |
f0706e82 | 784 | |
902acc78 JB |
785 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
786 | params && params->mesh_id_len) | |
472dbc45 JB |
787 | ieee80211_sdata_set_mesh_id(sdata, |
788 | params->mesh_id_len, | |
789 | params->mesh_id); | |
ee385855 | 790 | |
79010420 JB |
791 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
792 | ||
f0706e82 JB |
793 | if (new_dev) |
794 | *new_dev = ndev; | |
f0706e82 | 795 | |
f0706e82 JB |
796 | return 0; |
797 | ||
75636525 | 798 | fail: |
f0706e82 JB |
799 | free_netdev(ndev); |
800 | return ret; | |
801 | } | |
802 | ||
f698d856 | 803 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 804 | { |
f0706e82 | 805 | ASSERT_RTNL(); |
11a843b7 | 806 | |
75636525 JB |
807 | list_del_rcu(&sdata->list); |
808 | synchronize_rcu(); | |
f698d856 | 809 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
810 | } |
811 | ||
75636525 JB |
812 | /* |
813 | * Remove all interfaces, may only be called at hardware unregistration | |
814 | * time because it doesn't do RCU-safe list removals. | |
815 | */ | |
816 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 817 | { |
75636525 | 818 | struct ieee80211_sub_if_data *sdata, *tmp; |
f0706e82 JB |
819 | |
820 | ASSERT_RTNL(); | |
821 | ||
75636525 JB |
822 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
823 | list_del(&sdata->list); | |
824 | unregister_netdevice(sdata->dev); | |
f0706e82 | 825 | } |
f0706e82 | 826 | } |