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> | |
cf0277e7 | 18 | #include <net/ieee80211_radiotap.h> |
f0706e82 JB |
19 | #include "ieee80211_i.h" |
20 | #include "sta_info.h" | |
e9f207f0 | 21 | #include "debugfs_netdev.h" |
ee385855 | 22 | #include "mesh.h" |
0d143fe1 | 23 | #include "led.h" |
24487981 | 24 | #include "driver-ops.h" |
cf0277e7 | 25 | #include "wme.h" |
0d143fe1 | 26 | |
c771c9d8 JB |
27 | /** |
28 | * DOC: Interface list locking | |
29 | * | |
30 | * The interface list in each struct ieee80211_local is protected | |
31 | * three-fold: | |
32 | * | |
33 | * (1) modifications may only be done under the RTNL | |
34 | * (2) modifications and readers are protected against each other by | |
35 | * the iflist_mtx. | |
36 | * (3) modifications are done in an RCU manner so atomic readers | |
37 | * can traverse the list in RCU-safe blocks. | |
38 | * | |
39 | * As a consequence, reads (traversals) of the list can be protected | |
40 | * by either the RTNL, the iflist_mtx or RCU. | |
41 | */ | |
42 | ||
43 | ||
0d143fe1 JB |
44 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
45 | { | |
46 | int meshhdrlen; | |
47 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
48 | ||
49 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
50 | ||
51 | /* FIX: what would be proper limits for MTU? | |
52 | * This interface uses 802.3 frames. */ | |
53 | if (new_mtu < 256 || | |
54 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
55 | return -EINVAL; | |
56 | } | |
57 | ||
58 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
59 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
60 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
61 | dev->mtu = new_mtu; | |
62 | return 0; | |
63 | } | |
64 | ||
47846c9b JB |
65 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
66 | { | |
67 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
fc5f7577 | 68 | struct sockaddr *sa = addr; |
47846c9b JB |
69 | int ret; |
70 | ||
9607e6b6 | 71 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
72 | return -EBUSY; |
73 | ||
fc5f7577 | 74 | ret = eth_mac_addr(dev, sa); |
47846c9b JB |
75 | |
76 | if (ret == 0) | |
fc5f7577 | 77 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
47846c9b JB |
78 | |
79 | return ret; | |
80 | } | |
81 | ||
0d143fe1 JB |
82 | static inline int identical_mac_addr_allowed(int type1, int type2) |
83 | { | |
84 | return type1 == NL80211_IFTYPE_MONITOR || | |
85 | type2 == NL80211_IFTYPE_MONITOR || | |
86 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || | |
87 | (type1 == NL80211_IFTYPE_WDS && | |
88 | (type2 == NL80211_IFTYPE_WDS || | |
89 | type2 == NL80211_IFTYPE_AP)) || | |
90 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
91 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
92 | (type2 == NL80211_IFTYPE_AP || | |
93 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
94 | } | |
95 | ||
96 | static int ieee80211_open(struct net_device *dev) | |
97 | { | |
b4a4bf5d JB |
98 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
99 | struct ieee80211_sub_if_data *nsdata; | |
100 | struct ieee80211_local *local = sdata->local; | |
0d143fe1 | 101 | struct sta_info *sta; |
0d143fe1 JB |
102 | u32 changed = 0; |
103 | int res; | |
e8975581 | 104 | u32 hw_reconf_flags = 0; |
0d143fe1 JB |
105 | u8 null_addr[ETH_ALEN] = {0}; |
106 | ||
0d143fe1 JB |
107 | /* fail early if user set an invalid address */ |
108 | if (compare_ether_addr(dev->dev_addr, null_addr) && | |
109 | !is_valid_ether_addr(dev->dev_addr)) | |
110 | return -EADDRNOTAVAIL; | |
111 | ||
112 | /* we hold the RTNL here so can safely walk the list */ | |
113 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
114 | struct net_device *ndev = nsdata->dev; | |
115 | ||
9607e6b6 | 116 | if (ndev != dev && ieee80211_sdata_running(nsdata)) { |
0d143fe1 JB |
117 | /* |
118 | * Allow only a single IBSS interface to be up at any | |
119 | * time. This is restricted because beacon distribution | |
120 | * cannot work properly if both are in the same IBSS. | |
121 | * | |
122 | * To remove this restriction we'd have to disallow them | |
123 | * from setting the same SSID on different IBSS interfaces | |
124 | * belonging to the same hardware. Then, however, we're | |
125 | * faced with having to adopt two different TSF timers... | |
126 | */ | |
127 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
128 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) | |
129 | return -EBUSY; | |
130 | ||
131 | /* | |
132 | * The remaining checks are only performed for interfaces | |
133 | * with the same MAC address. | |
134 | */ | |
135 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
136 | continue; | |
137 | ||
138 | /* | |
139 | * check whether it may have the same address | |
140 | */ | |
141 | if (!identical_mac_addr_allowed(sdata->vif.type, | |
142 | nsdata->vif.type)) | |
143 | return -ENOTUNIQ; | |
144 | ||
145 | /* | |
146 | * can only add VLANs to enabled APs | |
147 | */ | |
148 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
149 | nsdata->vif.type == NL80211_IFTYPE_AP) | |
150 | sdata->bss = &nsdata->u.ap; | |
151 | } | |
152 | } | |
153 | ||
154 | switch (sdata->vif.type) { | |
155 | case NL80211_IFTYPE_WDS: | |
156 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
157 | return -ENOLINK; | |
158 | break; | |
159 | case NL80211_IFTYPE_AP_VLAN: | |
160 | if (!sdata->bss) | |
161 | return -ENOLINK; | |
162 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); | |
163 | break; | |
164 | case NL80211_IFTYPE_AP: | |
165 | sdata->bss = &sdata->u.ap; | |
166 | break; | |
167 | case NL80211_IFTYPE_MESH_POINT: | |
168 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
169 | break; | |
170 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
171 | atomic_inc(&local->iff_allmultis); | |
172 | break; | |
173 | case NL80211_IFTYPE_STATION: | |
174 | case NL80211_IFTYPE_MONITOR: | |
175 | case NL80211_IFTYPE_ADHOC: | |
176 | /* no special treatment */ | |
177 | break; | |
178 | case NL80211_IFTYPE_UNSPECIFIED: | |
179 | case __NL80211_IFTYPE_AFTER_LAST: | |
180 | /* cannot happen */ | |
181 | WARN_ON(1); | |
182 | break; | |
183 | } | |
184 | ||
185 | if (local->open_count == 0) { | |
24487981 | 186 | res = drv_start(local); |
0d143fe1 JB |
187 | if (res) |
188 | goto err_del_bss; | |
e8975581 JB |
189 | /* we're brought up, everything changes */ |
190 | hw_reconf_flags = ~0; | |
1f87f7d3 | 191 | ieee80211_led_radio(local, true); |
0d143fe1 JB |
192 | } |
193 | ||
194 | /* | |
195 | * Check all interfaces and copy the hopefully now-present | |
196 | * MAC address to those that have the special null one. | |
197 | */ | |
198 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
199 | struct net_device *ndev = nsdata->dev; | |
200 | ||
201 | /* | |
9607e6b6 | 202 | * No need to check running since we do not allow |
0d143fe1 JB |
203 | * it to start up with this invalid address. |
204 | */ | |
0adc23f5 | 205 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) { |
0d143fe1 JB |
206 | memcpy(ndev->dev_addr, |
207 | local->hw.wiphy->perm_addr, | |
208 | ETH_ALEN); | |
0adc23f5 JL |
209 | memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN); |
210 | } | |
0d143fe1 JB |
211 | } |
212 | ||
0d143fe1 JB |
213 | /* |
214 | * Validate the MAC address for this device. | |
215 | */ | |
216 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
24487981 JB |
217 | if (!local->open_count) |
218 | drv_stop(local); | |
0d143fe1 JB |
219 | return -EADDRNOTAVAIL; |
220 | } | |
221 | ||
222 | switch (sdata->vif.type) { | |
223 | case NL80211_IFTYPE_AP_VLAN: | |
224 | /* no need to tell driver */ | |
225 | break; | |
226 | case NL80211_IFTYPE_MONITOR: | |
227 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
228 | local->cooked_mntrs++; | |
229 | break; | |
230 | } | |
231 | ||
232 | /* must be before the call to ieee80211_configure_filter */ | |
233 | local->monitors++; | |
e8975581 | 234 | if (local->monitors == 1) { |
0869aea0 JB |
235 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
236 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 237 | } |
0d143fe1 JB |
238 | |
239 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
240 | local->fif_fcsfail++; | |
241 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
242 | local->fif_plcpfail++; | |
e3b90ca2 | 243 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
0d143fe1 | 244 | local->fif_control++; |
e3b90ca2 IP |
245 | local->fif_pspoll++; |
246 | } | |
0d143fe1 JB |
247 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
248 | local->fif_other_bss++; | |
249 | ||
0d143fe1 | 250 | ieee80211_configure_filter(local); |
0d143fe1 | 251 | break; |
0d143fe1 | 252 | default: |
1ed32e4f | 253 | res = drv_add_interface(local, &sdata->vif); |
0d143fe1 JB |
254 | if (res) |
255 | goto err_stop; | |
256 | ||
a3c9aa51 AY |
257 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
258 | local->fif_other_bss++; | |
a3c9aa51 | 259 | ieee80211_configure_filter(local); |
a3c9aa51 | 260 | |
0d143fe1 | 261 | ieee80211_start_mesh(sdata); |
e3b90ca2 IP |
262 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
263 | local->fif_pspoll++; | |
264 | ||
e3b90ca2 | 265 | ieee80211_configure_filter(local); |
a3c9aa51 | 266 | } |
e3b90ca2 | 267 | |
0d143fe1 JB |
268 | changed |= ieee80211_reset_erp_info(sdata); |
269 | ieee80211_bss_info_change_notify(sdata, changed); | |
270 | ieee80211_enable_keys(sdata); | |
271 | ||
7986cf95 | 272 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
0d143fe1 JB |
273 | netif_carrier_off(dev); |
274 | else | |
275 | netif_carrier_on(dev); | |
276 | } | |
277 | ||
278 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { | |
279 | /* Create STA entry for the WDS peer */ | |
280 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
281 | GFP_KERNEL); | |
282 | if (!sta) { | |
283 | res = -ENOMEM; | |
284 | goto err_del_interface; | |
285 | } | |
286 | ||
287 | /* no locking required since STA is not live yet */ | |
288 | sta->flags |= WLAN_STA_AUTHORIZED; | |
289 | ||
290 | res = sta_info_insert(sta); | |
291 | if (res) { | |
292 | /* STA has been freed */ | |
293 | goto err_del_interface; | |
294 | } | |
295 | } | |
296 | ||
0d143fe1 JB |
297 | /* |
298 | * set_multicast_list will be invoked by the networking core | |
299 | * which will check whether any increments here were done in | |
300 | * error and sync them down to the hardware as filter flags. | |
301 | */ | |
302 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
303 | atomic_inc(&local->iff_allmultis); | |
304 | ||
305 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
306 | atomic_inc(&local->iff_promiscs); | |
307 | ||
5cff20e6 JB |
308 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
309 | ||
0d143fe1 | 310 | local->open_count++; |
e8975581 JB |
311 | if (hw_reconf_flags) { |
312 | ieee80211_hw_config(local, hw_reconf_flags); | |
0d143fe1 JB |
313 | /* |
314 | * set default queue parameters so drivers don't | |
315 | * need to initialise the hardware if the hardware | |
316 | * doesn't start up with sane defaults | |
317 | */ | |
318 | ieee80211_set_wmm_default(sdata); | |
319 | } | |
320 | ||
10f644a4 | 321 | ieee80211_recalc_ps(local, -1); |
965bedad | 322 | |
0d143fe1 JB |
323 | /* |
324 | * ieee80211_sta_work is disabled while network interface | |
325 | * is down. Therefore, some configuration changes may not | |
326 | * yet be effective. Trigger execution of ieee80211_sta_work | |
327 | * to fix this. | |
328 | */ | |
46900298 | 329 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
42935eca | 330 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
f0706e82 | 331 | |
8a5b33f5 | 332 | netif_tx_start_all_queues(dev); |
0d143fe1 JB |
333 | |
334 | return 0; | |
335 | err_del_interface: | |
1ed32e4f | 336 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 | 337 | err_stop: |
24487981 JB |
338 | if (!local->open_count) |
339 | drv_stop(local); | |
0d143fe1 JB |
340 | err_del_bss: |
341 | sdata->bss = NULL; | |
342 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
343 | list_del(&sdata->u.vlan.list); | |
344 | return res; | |
345 | } | |
346 | ||
347 | static int ieee80211_stop(struct net_device *dev) | |
348 | { | |
349 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
350 | struct ieee80211_local *local = sdata->local; | |
0d143fe1 | 351 | struct sta_info *sta; |
5061b0c2 JB |
352 | unsigned long flags; |
353 | struct sk_buff *skb, *tmp; | |
e8975581 | 354 | u32 hw_reconf_flags = 0; |
5061b0c2 | 355 | int i; |
0d143fe1 JB |
356 | |
357 | /* | |
358 | * Stop TX on this interface first. | |
359 | */ | |
8a5b33f5 | 360 | netif_tx_stop_all_queues(dev); |
0d143fe1 | 361 | |
af6b6374 JB |
362 | /* |
363 | * Purge work for this interface. | |
364 | */ | |
365 | ieee80211_work_purge(sdata); | |
366 | ||
0d143fe1 JB |
367 | /* |
368 | * Now delete all active aggregation sessions. | |
369 | */ | |
370 | rcu_read_lock(); | |
371 | ||
372 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
373 | if (sta->sdata == sdata) | |
2dace10e | 374 | ieee80211_sta_tear_down_BA_sessions(sta); |
0d143fe1 JB |
375 | } |
376 | ||
377 | rcu_read_unlock(); | |
378 | ||
379 | /* | |
380 | * Remove all stations associated with this interface. | |
381 | * | |
382 | * This must be done before calling ops->remove_interface() | |
383 | * because otherwise we can later invoke ops->sta_notify() | |
384 | * whenever the STAs are removed, and that invalidates driver | |
385 | * assumptions about always getting a vif pointer that is valid | |
386 | * (because if we remove a STA after ops->remove_interface() | |
387 | * the driver will have removed the vif info already!) | |
388 | * | |
389 | * We could relax this and only unlink the stations from the | |
390 | * hash table and list but keep them on a per-sdata list that | |
391 | * will be inserted back again when the interface is brought | |
392 | * up again, but I don't currently see a use case for that, | |
393 | * except with WDS which gets a STA entry created when it is | |
394 | * brought up. | |
395 | */ | |
396 | sta_info_flush(local, sdata); | |
397 | ||
398 | /* | |
399 | * Don't count this interface for promisc/allmulti while it | |
400 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
401 | * on the master interface which will sync these down to the | |
402 | * hardware as filter flags. | |
403 | */ | |
404 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
405 | atomic_dec(&local->iff_allmultis); | |
406 | ||
407 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
408 | atomic_dec(&local->iff_promiscs); | |
409 | ||
e3b90ca2 IP |
410 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
411 | local->fif_pspoll--; | |
412 | ||
3b8d81e0 JB |
413 | netif_addr_lock_bh(dev); |
414 | spin_lock_bh(&local->filter_lock); | |
22bedad3 | 415 | __hw_addr_unsync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 JB |
416 | spin_unlock_bh(&local->filter_lock); |
417 | netif_addr_unlock_bh(dev); | |
418 | ||
3ac64bee JB |
419 | ieee80211_configure_filter(local); |
420 | ||
7cbf0ba5 VN |
421 | del_timer_sync(&local->dynamic_ps_timer); |
422 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 JB |
423 | |
424 | /* APs need special treatment */ | |
425 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 426 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
427 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
428 | ||
429 | /* remove beacon */ | |
430 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
431 | synchronize_rcu(); | |
432 | kfree(old_beacon); | |
433 | ||
434 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 435 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
436 | u.vlan.list) |
437 | dev_close(vlan->dev); | |
438 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
439 | } | |
440 | ||
441 | local->open_count--; | |
442 | ||
443 | switch (sdata->vif.type) { | |
444 | case NL80211_IFTYPE_AP_VLAN: | |
445 | list_del(&sdata->u.vlan.list); | |
446 | /* no need to tell driver */ | |
447 | break; | |
448 | case NL80211_IFTYPE_MONITOR: | |
449 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
450 | local->cooked_mntrs--; | |
451 | break; | |
452 | } | |
453 | ||
454 | local->monitors--; | |
e8975581 | 455 | if (local->monitors == 0) { |
0869aea0 JB |
456 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
457 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 458 | } |
0d143fe1 JB |
459 | |
460 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
461 | local->fif_fcsfail--; | |
462 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
463 | local->fif_plcpfail--; | |
e3b90ca2 IP |
464 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
465 | local->fif_pspoll--; | |
0d143fe1 | 466 | local->fif_control--; |
e3b90ca2 | 467 | } |
0d143fe1 JB |
468 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
469 | local->fif_other_bss--; | |
470 | ||
0d143fe1 | 471 | ieee80211_configure_filter(local); |
0d143fe1 JB |
472 | break; |
473 | case NL80211_IFTYPE_STATION: | |
46900298 JB |
474 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
475 | del_timer_sync(&sdata->u.mgd.timer); | |
0e2b6286 JB |
476 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
477 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
0d143fe1 | 478 | /* |
0e2b6286 JB |
479 | * If any of the timers fired while we waited for it, it will |
480 | * have queued its work. Now the work will be running again | |
0d143fe1 JB |
481 | * but will not rearm the timer again because it checks |
482 | * whether the interface is running, which, at this point, | |
483 | * it no longer is. | |
484 | */ | |
46900298 JB |
485 | cancel_work_sync(&sdata->u.mgd.work); |
486 | cancel_work_sync(&sdata->u.mgd.chswitch_work); | |
0e2b6286 | 487 | cancel_work_sync(&sdata->u.mgd.monitor_work); |
1e4dcd01 | 488 | cancel_work_sync(&sdata->u.mgd.beacon_connection_loss_work); |
04de8381 | 489 | |
0d143fe1 JB |
490 | /* |
491 | * When we get here, the interface is marked down. | |
492 | * Call synchronize_rcu() to wait for the RX path | |
493 | * should it be using the interface and enqueuing | |
494 | * frames at this very time on another CPU. | |
495 | */ | |
496 | synchronize_rcu(); | |
46900298 | 497 | skb_queue_purge(&sdata->u.mgd.skb_queue); |
46900298 JB |
498 | /* fall through */ |
499 | case NL80211_IFTYPE_ADHOC: | |
500 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
46900298 JB |
501 | del_timer_sync(&sdata->u.ibss.timer); |
502 | cancel_work_sync(&sdata->u.ibss.work); | |
503 | synchronize_rcu(); | |
504 | skb_queue_purge(&sdata->u.ibss.skb_queue); | |
505 | } | |
0d143fe1 JB |
506 | /* fall through */ |
507 | case NL80211_IFTYPE_MESH_POINT: | |
508 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
509 | /* other_bss and allmulti are always set on mesh |
510 | * ifaces */ | |
511 | local->fif_other_bss--; | |
0d143fe1 | 512 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 | 513 | |
a3c9aa51 | 514 | ieee80211_configure_filter(local); |
a3c9aa51 | 515 | |
0d143fe1 JB |
516 | ieee80211_stop_mesh(sdata); |
517 | } | |
518 | /* fall through */ | |
519 | default: | |
15db0b7f JB |
520 | if (local->scan_sdata == sdata) |
521 | ieee80211_scan_cancel(local); | |
0d143fe1 | 522 | |
97af7432 BC |
523 | /* |
524 | * Disable beaconing for AP and mesh, IBSS can't | |
525 | * still be joined to a network at this point. | |
526 | */ | |
527 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
528 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { | |
529 | ieee80211_bss_info_change_notify(sdata, | |
530 | BSS_CHANGED_BEACON_ENABLED); | |
531 | } | |
532 | ||
0d143fe1 JB |
533 | /* disable all keys for as long as this netdev is down */ |
534 | ieee80211_disable_keys(sdata); | |
1ed32e4f | 535 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 JB |
536 | } |
537 | ||
538 | sdata->bss = NULL; | |
539 | ||
5cff20e6 JB |
540 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
541 | ||
542 | ieee80211_recalc_ps(local, -1); | |
543 | ||
0d143fe1 | 544 | if (local->open_count == 0) { |
ea77f12f | 545 | ieee80211_clear_tx_pending(local); |
84f6a01c | 546 | ieee80211_stop_device(local); |
0d143fe1 | 547 | |
e8975581 JB |
548 | /* no reconfiguring after stop! */ |
549 | hw_reconf_flags = 0; | |
0d143fe1 JB |
550 | } |
551 | ||
e8975581 JB |
552 | /* do after stop to avoid reconfiguring when we stop anyway */ |
553 | if (hw_reconf_flags) | |
554 | ieee80211_hw_config(local, hw_reconf_flags); | |
555 | ||
5061b0c2 JB |
556 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
557 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
558 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
559 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
560 | if (info->control.vif == &sdata->vif) { | |
561 | __skb_unlink(skb, &local->pending[i]); | |
562 | dev_kfree_skb_irq(skb); | |
563 | } | |
564 | } | |
565 | } | |
566 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
567 | ||
0d143fe1 JB |
568 | return 0; |
569 | } | |
570 | ||
571 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
572 | { | |
0d143fe1 | 573 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 574 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
575 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
576 | ||
577 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
578 | promisc = !!(dev->flags & IFF_PROMISC); | |
579 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
580 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
581 | ||
582 | if (allmulti != sdata_allmulti) { | |
583 | if (dev->flags & IFF_ALLMULTI) | |
584 | atomic_inc(&local->iff_allmultis); | |
585 | else | |
586 | atomic_dec(&local->iff_allmultis); | |
587 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
588 | } | |
589 | ||
590 | if (promisc != sdata_promisc) { | |
591 | if (dev->flags & IFF_PROMISC) | |
592 | atomic_inc(&local->iff_promiscs); | |
593 | else | |
594 | atomic_dec(&local->iff_promiscs); | |
595 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
596 | } | |
3b8d81e0 | 597 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 598 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 599 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 600 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
601 | } |
602 | ||
75636525 JB |
603 | /* |
604 | * Called when the netdev is removed or, by the code below, before | |
605 | * the interface type changes. | |
606 | */ | |
607 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 608 | { |
75636525 JB |
609 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
610 | struct ieee80211_local *local = sdata->local; | |
611 | struct beacon_data *beacon; | |
612 | struct sk_buff *skb; | |
613 | int flushed; | |
f0706e82 JB |
614 | int i; |
615 | ||
75636525 JB |
616 | /* free extra data */ |
617 | ieee80211_free_keys(sdata); | |
618 | ||
aee14ceb JM |
619 | ieee80211_debugfs_remove_netdev(sdata); |
620 | ||
f0706e82 | 621 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
622 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
623 | sdata->fragment_next = 0; | |
11a843b7 | 624 | |
75636525 | 625 | switch (sdata->vif.type) { |
05c914fe | 626 | case NL80211_IFTYPE_AP: |
75636525 JB |
627 | beacon = sdata->u.ap.beacon; |
628 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
629 | synchronize_rcu(); | |
630 | kfree(beacon); | |
3e122be0 | 631 | |
75636525 JB |
632 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
633 | local->total_ps_buffered--; | |
634 | dev_kfree_skb(skb); | |
635 | } | |
636 | ||
637 | break; | |
05c914fe | 638 | case NL80211_IFTYPE_MESH_POINT: |
75636525 | 639 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 640 | mesh_rmc_free(sdata); |
472dbc45 | 641 | break; |
05c914fe | 642 | case NL80211_IFTYPE_ADHOC: |
af8cdcd8 JB |
643 | if (WARN_ON(sdata->u.ibss.presp)) |
644 | kfree_skb(sdata->u.ibss.presp); | |
46900298 JB |
645 | break; |
646 | case NL80211_IFTYPE_STATION: | |
05c914fe JB |
647 | case NL80211_IFTYPE_WDS: |
648 | case NL80211_IFTYPE_AP_VLAN: | |
649 | case NL80211_IFTYPE_MONITOR: | |
75636525 | 650 | break; |
05c914fe JB |
651 | case NL80211_IFTYPE_UNSPECIFIED: |
652 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
653 | BUG(); |
654 | break; | |
655 | } | |
656 | ||
657 | flushed = sta_info_flush(local, sdata); | |
658 | WARN_ON(flushed); | |
f0706e82 JB |
659 | } |
660 | ||
cf0277e7 JB |
661 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
662 | struct sk_buff *skb) | |
663 | { | |
664 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
665 | } | |
666 | ||
587e729e JB |
667 | static const struct net_device_ops ieee80211_dataif_ops = { |
668 | .ndo_open = ieee80211_open, | |
669 | .ndo_stop = ieee80211_stop, | |
670 | .ndo_uninit = ieee80211_teardown_sdata, | |
671 | .ndo_start_xmit = ieee80211_subif_start_xmit, | |
672 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
673 | .ndo_change_mtu = ieee80211_change_mtu, | |
47846c9b | 674 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 675 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
676 | }; |
677 | ||
cf0277e7 JB |
678 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
679 | struct sk_buff *skb) | |
680 | { | |
681 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
682 | struct ieee80211_local *local = sdata->local; | |
683 | struct ieee80211_hdr *hdr; | |
684 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
193e70ef | 685 | u8 *p; |
cf0277e7 JB |
686 | |
687 | if (local->hw.queues < 4) | |
688 | return 0; | |
689 | ||
690 | if (skb->len < 4 || | |
b49bb574 | 691 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
692 | return 0; /* doesn't matter, frame will be dropped */ |
693 | ||
b49bb574 | 694 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 695 | |
861a57cd | 696 | if (!ieee80211_is_data(hdr->frame_control)) { |
cf0277e7 JB |
697 | skb->priority = 7; |
698 | return ieee802_1d_to_ac[skb->priority]; | |
699 | } | |
861a57cd FF |
700 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
701 | skb->priority = 0; | |
702 | return ieee802_1d_to_ac[skb->priority]; | |
703 | } | |
cf0277e7 | 704 | |
193e70ef FF |
705 | p = ieee80211_get_qos_ctl(hdr); |
706 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
707 | ||
cf0277e7 JB |
708 | return ieee80211_downgrade_queue(local, skb); |
709 | } | |
710 | ||
587e729e JB |
711 | static const struct net_device_ops ieee80211_monitorif_ops = { |
712 | .ndo_open = ieee80211_open, | |
713 | .ndo_stop = ieee80211_stop, | |
714 | .ndo_uninit = ieee80211_teardown_sdata, | |
715 | .ndo_start_xmit = ieee80211_monitor_start_xmit, | |
716 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
717 | .ndo_change_mtu = ieee80211_change_mtu, | |
718 | .ndo_set_mac_address = eth_mac_addr, | |
cf0277e7 | 719 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
720 | }; |
721 | ||
722 | static void ieee80211_if_setup(struct net_device *dev) | |
723 | { | |
724 | ether_setup(dev); | |
725 | dev->netdev_ops = &ieee80211_dataif_ops; | |
587e729e JB |
726 | dev->destructor = free_netdev; |
727 | } | |
728 | ||
75636525 JB |
729 | /* |
730 | * Helper function to initialise an interface to a specific type. | |
731 | */ | |
732 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 733 | enum nl80211_iftype type) |
f0706e82 | 734 | { |
75636525 JB |
735 | /* clear type-dependent union */ |
736 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
737 | ||
738 | /* and set some type-dependent values */ | |
739 | sdata->vif.type = type; | |
587e729e | 740 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
60719ffd | 741 | sdata->wdev.iftype = type; |
75636525 JB |
742 | |
743 | /* only monitor differs */ | |
744 | sdata->dev->type = ARPHRD_ETHER; | |
745 | ||
746 | switch (type) { | |
05c914fe | 747 | case NL80211_IFTYPE_AP: |
75636525 JB |
748 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
749 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
750 | break; | |
05c914fe | 751 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 752 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 753 | break; |
46900298 JB |
754 | case NL80211_IFTYPE_ADHOC: |
755 | ieee80211_ibss_setup_sdata(sdata); | |
756 | break; | |
05c914fe | 757 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
758 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
759 | ieee80211_mesh_init_sdata(sdata); | |
760 | break; | |
05c914fe | 761 | case NL80211_IFTYPE_MONITOR: |
75636525 | 762 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 763 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
764 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
765 | MONITOR_FLAG_OTHER_BSS; | |
766 | break; | |
05c914fe JB |
767 | case NL80211_IFTYPE_WDS: |
768 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 769 | break; |
05c914fe JB |
770 | case NL80211_IFTYPE_UNSPECIFIED: |
771 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
772 | BUG(); |
773 | break; | |
774 | } | |
775 | ||
776 | ieee80211_debugfs_add_netdev(sdata); | |
777 | } | |
778 | ||
f3947e2d | 779 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 780 | enum nl80211_iftype type) |
75636525 | 781 | { |
f3947e2d JB |
782 | ASSERT_RTNL(); |
783 | ||
784 | if (type == sdata->vif.type) | |
785 | return 0; | |
786 | ||
e60c7744 | 787 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
788 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
789 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
790 | return -EOPNOTSUPP; |
791 | ||
f3947e2d JB |
792 | /* |
793 | * We could, here, on changes between IBSS/STA/MESH modes, | |
794 | * invoke an MLME function instead that disassociates etc. | |
795 | * and goes into the requested mode. | |
796 | */ | |
797 | ||
9607e6b6 | 798 | if (ieee80211_sdata_running(sdata)) |
f3947e2d JB |
799 | return -EBUSY; |
800 | ||
75636525 JB |
801 | /* Purge and reset type-dependent state. */ |
802 | ieee80211_teardown_sdata(sdata->dev); | |
803 | ieee80211_setup_sdata(sdata, type); | |
804 | ||
805 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 806 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
807 | ieee80211_mandatory_rates(sdata->local, |
808 | sdata->local->hw.conf.channel->band); | |
75636525 | 809 | sdata->drop_unencrypted = 0; |
9bc383de JB |
810 | if (type == NL80211_IFTYPE_STATION) |
811 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
812 | |
813 | return 0; | |
f0706e82 JB |
814 | } |
815 | ||
fa9029f8 JB |
816 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
817 | struct net_device *dev, | |
818 | enum nl80211_iftype type) | |
819 | { | |
820 | struct ieee80211_sub_if_data *sdata; | |
821 | u64 mask, start, addr, val, inc; | |
822 | u8 *m; | |
823 | u8 tmp_addr[ETH_ALEN]; | |
824 | int i; | |
825 | ||
826 | /* default ... something at least */ | |
827 | memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
828 | ||
829 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
830 | local->hw.wiphy->n_addresses <= 1) | |
831 | return; | |
832 | ||
833 | ||
834 | mutex_lock(&local->iflist_mtx); | |
835 | ||
836 | switch (type) { | |
837 | case NL80211_IFTYPE_MONITOR: | |
838 | /* doesn't matter */ | |
839 | break; | |
840 | case NL80211_IFTYPE_WDS: | |
841 | case NL80211_IFTYPE_AP_VLAN: | |
842 | /* match up with an AP interface */ | |
843 | list_for_each_entry(sdata, &local->interfaces, list) { | |
844 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
845 | continue; | |
846 | memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); | |
847 | break; | |
848 | } | |
849 | /* keep default if no AP interface present */ | |
850 | break; | |
851 | default: | |
852 | /* assign a new address if possible -- try n_addresses first */ | |
853 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
854 | bool used = false; | |
855 | ||
856 | list_for_each_entry(sdata, &local->interfaces, list) { | |
857 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
858 | sdata->vif.addr, ETH_ALEN) == 0) { | |
859 | used = true; | |
860 | break; | |
861 | } | |
862 | } | |
863 | ||
864 | if (!used) { | |
865 | memcpy(dev->perm_addr, | |
866 | local->hw.wiphy->addresses[i].addr, | |
867 | ETH_ALEN); | |
868 | break; | |
869 | } | |
870 | } | |
871 | ||
872 | /* try mask if available */ | |
873 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
874 | break; | |
875 | ||
876 | m = local->hw.wiphy->addr_mask; | |
877 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
878 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
879 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
880 | ||
881 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
882 | /* not a contiguous mask ... not handled now! */ | |
883 | printk(KERN_DEBUG "not contiguous\n"); | |
884 | break; | |
885 | } | |
886 | ||
887 | m = local->hw.wiphy->perm_addr; | |
888 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
889 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
890 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
891 | ||
892 | inc = 1ULL<<__ffs64(mask); | |
893 | val = (start & mask); | |
894 | addr = (start & ~mask) | (val & mask); | |
895 | do { | |
896 | bool used = false; | |
897 | ||
898 | tmp_addr[5] = addr >> 0*8; | |
899 | tmp_addr[4] = addr >> 1*8; | |
900 | tmp_addr[3] = addr >> 2*8; | |
901 | tmp_addr[2] = addr >> 3*8; | |
902 | tmp_addr[1] = addr >> 4*8; | |
903 | tmp_addr[0] = addr >> 5*8; | |
904 | ||
905 | val += inc; | |
906 | ||
907 | list_for_each_entry(sdata, &local->interfaces, list) { | |
908 | if (memcmp(tmp_addr, sdata->vif.addr, | |
909 | ETH_ALEN) == 0) { | |
910 | used = true; | |
911 | break; | |
912 | } | |
913 | } | |
914 | ||
915 | if (!used) { | |
916 | memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); | |
917 | break; | |
918 | } | |
919 | addr = (start & ~mask) | (val & mask); | |
920 | } while (addr != start); | |
921 | ||
922 | break; | |
923 | } | |
924 | ||
925 | mutex_unlock(&local->iflist_mtx); | |
926 | } | |
927 | ||
3e122be0 | 928 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 929 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 930 | struct vif_params *params) |
f0706e82 JB |
931 | { |
932 | struct net_device *ndev; | |
f0706e82 | 933 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 934 | int ret, i; |
f0706e82 JB |
935 | |
936 | ASSERT_RTNL(); | |
75636525 | 937 | |
cf0277e7 JB |
938 | ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, |
939 | name, ieee80211_if_setup, local->hw.queues); | |
f0706e82 JB |
940 | if (!ndev) |
941 | return -ENOMEM; | |
a272a720 | 942 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
f0706e82 | 943 | |
f3994ece JB |
944 | ndev->needed_headroom = local->tx_headroom + |
945 | 4*6 /* four MAC addresses */ | |
946 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
947 | + 6 /* mesh */ | |
948 | + 8 /* rfc1042/bridge tunnel */ | |
949 | - ETH_HLEN /* ethernet hard_header_len */ | |
950 | + IEEE80211_ENCRYPT_HEADROOM; | |
951 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
952 | ||
f0706e82 JB |
953 | ret = dev_alloc_name(ndev, ndev->name); |
954 | if (ret < 0) | |
955 | goto fail; | |
956 | ||
fa9029f8 JB |
957 | ieee80211_assign_perm_addr(local, ndev, type); |
958 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
f0706e82 JB |
959 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
960 | ||
3e122be0 JB |
961 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
962 | sdata = netdev_priv(ndev); | |
f0706e82 | 963 | ndev->ieee80211_ptr = &sdata->wdev; |
47846c9b JB |
964 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
965 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
75636525 JB |
966 | |
967 | /* initialise type-independent data */ | |
f0706e82 | 968 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 969 | sdata->local = local; |
75636525 JB |
970 | sdata->dev = ndev; |
971 | ||
972 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
973 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
974 | ||
975 | INIT_LIST_HEAD(&sdata->key_list); | |
976 | ||
37eb0b16 JM |
977 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
978 | struct ieee80211_supported_band *sband; | |
979 | sband = local->hw.wiphy->bands[i]; | |
980 | sdata->rc_rateidx_mask[i] = | |
981 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
982 | } | |
75636525 JB |
983 | |
984 | /* setup type-dependent data */ | |
985 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 986 | |
9bc383de JB |
987 | if (params) { |
988 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
989 | if (type == NL80211_IFTYPE_STATION) | |
990 | sdata->u.mgd.use_4addr = params->use_4addr; | |
991 | } | |
992 | ||
f0706e82 JB |
993 | ret = register_netdevice(ndev); |
994 | if (ret) | |
995 | goto fail; | |
996 | ||
902acc78 JB |
997 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
998 | params && params->mesh_id_len) | |
472dbc45 JB |
999 | ieee80211_sdata_set_mesh_id(sdata, |
1000 | params->mesh_id_len, | |
1001 | params->mesh_id); | |
ee385855 | 1002 | |
c771c9d8 | 1003 | mutex_lock(&local->iflist_mtx); |
79010420 | 1004 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1005 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1006 | |
f0706e82 JB |
1007 | if (new_dev) |
1008 | *new_dev = ndev; | |
f0706e82 | 1009 | |
f0706e82 JB |
1010 | return 0; |
1011 | ||
75636525 | 1012 | fail: |
f0706e82 JB |
1013 | free_netdev(ndev); |
1014 | return ret; | |
1015 | } | |
1016 | ||
f698d856 | 1017 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1018 | { |
f0706e82 | 1019 | ASSERT_RTNL(); |
11a843b7 | 1020 | |
c771c9d8 | 1021 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1022 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1023 | mutex_unlock(&sdata->local->iflist_mtx); |
1024 | ||
75636525 | 1025 | synchronize_rcu(); |
f698d856 | 1026 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
1027 | } |
1028 | ||
75636525 JB |
1029 | /* |
1030 | * Remove all interfaces, may only be called at hardware unregistration | |
1031 | * time because it doesn't do RCU-safe list removals. | |
1032 | */ | |
1033 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1034 | { |
75636525 | 1035 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1036 | LIST_HEAD(unreg_list); |
f0706e82 JB |
1037 | |
1038 | ASSERT_RTNL(); | |
1039 | ||
efe117ab | 1040 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1041 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1042 | list_del(&sdata->list); | |
c771c9d8 | 1043 | |
efe117ab | 1044 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
f0706e82 | 1045 | } |
efe117ab ED |
1046 | mutex_unlock(&local->iflist_mtx); |
1047 | unregister_netdevice_many(&unreg_list); | |
f0706e82 | 1048 | } |
5cff20e6 JB |
1049 | |
1050 | static u32 ieee80211_idle_off(struct ieee80211_local *local, | |
1051 | const char *reason) | |
1052 | { | |
1053 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
1054 | return 0; | |
1055 | ||
1056 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1057 | printk(KERN_DEBUG "%s: device no longer idle - %s\n", | |
1058 | wiphy_name(local->hw.wiphy), reason); | |
1059 | #endif | |
1060 | ||
1061 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
1062 | return IEEE80211_CONF_CHANGE_IDLE; | |
1063 | } | |
1064 | ||
1065 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
1066 | { | |
1067 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
1068 | return 0; | |
1069 | ||
1070 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1071 | printk(KERN_DEBUG "%s: device now idle\n", | |
1072 | wiphy_name(local->hw.wiphy)); | |
1073 | #endif | |
1074 | ||
a80f7c0b JB |
1075 | drv_flush(local, false); |
1076 | ||
5cff20e6 JB |
1077 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
1078 | return IEEE80211_CONF_CHANGE_IDLE; | |
1079 | } | |
1080 | ||
1081 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
1082 | { | |
1083 | struct ieee80211_sub_if_data *sdata; | |
1084 | int count = 0; | |
1085 | ||
af6b6374 JB |
1086 | if (!list_empty(&local->work_list)) |
1087 | return ieee80211_idle_off(local, "working"); | |
1088 | ||
fbe9c429 | 1089 | if (local->scanning) |
5cff20e6 JB |
1090 | return ieee80211_idle_off(local, "scanning"); |
1091 | ||
1092 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1093 | if (!ieee80211_sdata_running(sdata)) |
5cff20e6 JB |
1094 | continue; |
1095 | /* do not count disabled managed interfaces */ | |
1096 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
af6b6374 | 1097 | !sdata->u.mgd.associated) |
5cff20e6 JB |
1098 | continue; |
1099 | /* do not count unused IBSS interfaces */ | |
1100 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
1101 | !sdata->u.ibss.ssid_len) | |
1102 | continue; | |
1103 | /* count everything else */ | |
1104 | count++; | |
1105 | } | |
1106 | ||
1107 | if (!count) | |
1108 | return ieee80211_idle_on(local); | |
1109 | else | |
1110 | return ieee80211_idle_off(local, "in use"); | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
1116 | { | |
1117 | u32 chg; | |
1118 | ||
1119 | mutex_lock(&local->iflist_mtx); | |
1120 | chg = __ieee80211_recalc_idle(local); | |
1121 | mutex_unlock(&local->iflist_mtx); | |
58905ca5 JB |
1122 | if (chg) |
1123 | ieee80211_hw_config(local, chg); | |
5cff20e6 | 1124 | } |
47846c9b JB |
1125 | |
1126 | static int netdev_notify(struct notifier_block *nb, | |
1127 | unsigned long state, | |
1128 | void *ndev) | |
1129 | { | |
1130 | struct net_device *dev = ndev; | |
1131 | struct ieee80211_sub_if_data *sdata; | |
1132 | ||
1133 | if (state != NETDEV_CHANGENAME) | |
1134 | return 0; | |
1135 | ||
1136 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1137 | return 0; | |
1138 | ||
1139 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1140 | return 0; | |
1141 | ||
1142 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1143 | ||
2f5265e6 | 1144 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1145 | |
1146 | ieee80211_debugfs_rename_netdev(sdata); | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | static struct notifier_block mac80211_netdev_notifier = { | |
1151 | .notifier_call = netdev_notify, | |
1152 | }; | |
1153 | ||
1154 | int ieee80211_iface_init(void) | |
1155 | { | |
1156 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1157 | } | |
1158 | ||
1159 | void ieee80211_iface_exit(void) | |
1160 | { | |
1161 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1162 | } |