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Commit | Line | Data |
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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 | */ | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
f0706e82 JB |
14 | #include <linux/kernel.h> |
15 | #include <linux/if_arp.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/rtnetlink.h> | |
18 | #include <net/mac80211.h> | |
cf0277e7 | 19 | #include <net/ieee80211_radiotap.h> |
f0706e82 JB |
20 | #include "ieee80211_i.h" |
21 | #include "sta_info.h" | |
e9f207f0 | 22 | #include "debugfs_netdev.h" |
ee385855 | 23 | #include "mesh.h" |
0d143fe1 | 24 | #include "led.h" |
24487981 | 25 | #include "driver-ops.h" |
cf0277e7 | 26 | #include "wme.h" |
0d143fe1 | 27 | |
c771c9d8 JB |
28 | /** |
29 | * DOC: Interface list locking | |
30 | * | |
31 | * The interface list in each struct ieee80211_local is protected | |
32 | * three-fold: | |
33 | * | |
34 | * (1) modifications may only be done under the RTNL | |
35 | * (2) modifications and readers are protected against each other by | |
36 | * the iflist_mtx. | |
37 | * (3) modifications are done in an RCU manner so atomic readers | |
38 | * can traverse the list in RCU-safe blocks. | |
39 | * | |
40 | * As a consequence, reads (traversals) of the list can be protected | |
41 | * by either the RTNL, the iflist_mtx or RCU. | |
42 | */ | |
43 | ||
44 | ||
0d143fe1 JB |
45 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
46 | { | |
47 | int meshhdrlen; | |
48 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
49 | ||
50 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
51 | ||
52 | /* FIX: what would be proper limits for MTU? | |
53 | * This interface uses 802.3 frames. */ | |
54 | if (new_mtu < 256 || | |
55 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
56 | return -EINVAL; | |
57 | } | |
58 | ||
59 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
60 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
61 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
62 | dev->mtu = new_mtu; | |
63 | return 0; | |
64 | } | |
65 | ||
47846c9b JB |
66 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
67 | { | |
68 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
fc5f7577 | 69 | struct sockaddr *sa = addr; |
47846c9b JB |
70 | int ret; |
71 | ||
9607e6b6 | 72 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
73 | return -EBUSY; |
74 | ||
fc5f7577 | 75 | ret = eth_mac_addr(dev, sa); |
47846c9b JB |
76 | |
77 | if (ret == 0) | |
fc5f7577 | 78 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
47846c9b JB |
79 | |
80 | return ret; | |
81 | } | |
82 | ||
0d143fe1 JB |
83 | static inline int identical_mac_addr_allowed(int type1, int type2) |
84 | { | |
85 | return type1 == NL80211_IFTYPE_MONITOR || | |
86 | type2 == NL80211_IFTYPE_MONITOR || | |
87 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || | |
88 | (type1 == NL80211_IFTYPE_WDS && | |
89 | (type2 == NL80211_IFTYPE_WDS || | |
90 | type2 == NL80211_IFTYPE_AP)) || | |
91 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
92 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
93 | (type2 == NL80211_IFTYPE_AP || | |
94 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
95 | } | |
96 | ||
97 | static int ieee80211_open(struct net_device *dev) | |
98 | { | |
b4a4bf5d JB |
99 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
100 | struct ieee80211_sub_if_data *nsdata; | |
101 | struct ieee80211_local *local = sdata->local; | |
0d143fe1 | 102 | struct sta_info *sta; |
0d143fe1 JB |
103 | u32 changed = 0; |
104 | int res; | |
e8975581 | 105 | u32 hw_reconf_flags = 0; |
0d143fe1 JB |
106 | u8 null_addr[ETH_ALEN] = {0}; |
107 | ||
0d143fe1 JB |
108 | /* fail early if user set an invalid address */ |
109 | if (compare_ether_addr(dev->dev_addr, null_addr) && | |
110 | !is_valid_ether_addr(dev->dev_addr)) | |
111 | return -EADDRNOTAVAIL; | |
112 | ||
113 | /* we hold the RTNL here so can safely walk the list */ | |
114 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
115 | struct net_device *ndev = nsdata->dev; | |
116 | ||
9607e6b6 | 117 | if (ndev != dev && ieee80211_sdata_running(nsdata)) { |
0d143fe1 JB |
118 | /* |
119 | * Allow only a single IBSS interface to be up at any | |
120 | * time. This is restricted because beacon distribution | |
121 | * cannot work properly if both are in the same IBSS. | |
122 | * | |
123 | * To remove this restriction we'd have to disallow them | |
124 | * from setting the same SSID on different IBSS interfaces | |
125 | * belonging to the same hardware. Then, however, we're | |
126 | * faced with having to adopt two different TSF timers... | |
127 | */ | |
128 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
129 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) | |
130 | return -EBUSY; | |
131 | ||
132 | /* | |
133 | * The remaining checks are only performed for interfaces | |
134 | * with the same MAC address. | |
135 | */ | |
136 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
137 | continue; | |
138 | ||
139 | /* | |
140 | * check whether it may have the same address | |
141 | */ | |
142 | if (!identical_mac_addr_allowed(sdata->vif.type, | |
143 | nsdata->vif.type)) | |
144 | return -ENOTUNIQ; | |
145 | ||
146 | /* | |
147 | * can only add VLANs to enabled APs | |
148 | */ | |
149 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
150 | nsdata->vif.type == NL80211_IFTYPE_AP) | |
151 | sdata->bss = &nsdata->u.ap; | |
152 | } | |
153 | } | |
154 | ||
155 | switch (sdata->vif.type) { | |
156 | case NL80211_IFTYPE_WDS: | |
157 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
158 | return -ENOLINK; | |
159 | break; | |
160 | case NL80211_IFTYPE_AP_VLAN: | |
161 | if (!sdata->bss) | |
162 | return -ENOLINK; | |
163 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); | |
164 | break; | |
165 | case NL80211_IFTYPE_AP: | |
166 | sdata->bss = &sdata->u.ap; | |
167 | break; | |
168 | case NL80211_IFTYPE_MESH_POINT: | |
169 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
170 | break; | |
171 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
172 | atomic_inc(&local->iff_allmultis); | |
173 | break; | |
174 | case NL80211_IFTYPE_STATION: | |
175 | case NL80211_IFTYPE_MONITOR: | |
176 | case NL80211_IFTYPE_ADHOC: | |
177 | /* no special treatment */ | |
178 | break; | |
179 | case NL80211_IFTYPE_UNSPECIFIED: | |
180 | case __NL80211_IFTYPE_AFTER_LAST: | |
181 | /* cannot happen */ | |
182 | WARN_ON(1); | |
183 | break; | |
184 | } | |
185 | ||
186 | if (local->open_count == 0) { | |
24487981 | 187 | res = drv_start(local); |
0d143fe1 JB |
188 | if (res) |
189 | goto err_del_bss; | |
e8975581 JB |
190 | /* we're brought up, everything changes */ |
191 | hw_reconf_flags = ~0; | |
1f87f7d3 | 192 | ieee80211_led_radio(local, true); |
0d143fe1 JB |
193 | } |
194 | ||
195 | /* | |
196 | * Check all interfaces and copy the hopefully now-present | |
197 | * MAC address to those that have the special null one. | |
198 | */ | |
199 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
200 | struct net_device *ndev = nsdata->dev; | |
201 | ||
202 | /* | |
9607e6b6 | 203 | * No need to check running since we do not allow |
0d143fe1 JB |
204 | * it to start up with this invalid address. |
205 | */ | |
0adc23f5 | 206 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) { |
0d143fe1 JB |
207 | memcpy(ndev->dev_addr, |
208 | local->hw.wiphy->perm_addr, | |
209 | ETH_ALEN); | |
0adc23f5 JL |
210 | memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN); |
211 | } | |
0d143fe1 JB |
212 | } |
213 | ||
0d143fe1 JB |
214 | /* |
215 | * Validate the MAC address for this device. | |
216 | */ | |
217 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
24487981 JB |
218 | if (!local->open_count) |
219 | drv_stop(local); | |
0d143fe1 JB |
220 | return -EADDRNOTAVAIL; |
221 | } | |
222 | ||
223 | switch (sdata->vif.type) { | |
224 | case NL80211_IFTYPE_AP_VLAN: | |
225 | /* no need to tell driver */ | |
226 | break; | |
227 | case NL80211_IFTYPE_MONITOR: | |
228 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
229 | local->cooked_mntrs++; | |
230 | break; | |
231 | } | |
232 | ||
233 | /* must be before the call to ieee80211_configure_filter */ | |
234 | local->monitors++; | |
e8975581 | 235 | if (local->monitors == 1) { |
0869aea0 JB |
236 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
237 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 238 | } |
0d143fe1 JB |
239 | |
240 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
241 | local->fif_fcsfail++; | |
242 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
243 | local->fif_plcpfail++; | |
e3b90ca2 | 244 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
0d143fe1 | 245 | local->fif_control++; |
e3b90ca2 IP |
246 | local->fif_pspoll++; |
247 | } | |
0d143fe1 JB |
248 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
249 | local->fif_other_bss++; | |
250 | ||
0d143fe1 | 251 | ieee80211_configure_filter(local); |
0d143fe1 | 252 | break; |
0d143fe1 | 253 | default: |
1ed32e4f | 254 | res = drv_add_interface(local, &sdata->vif); |
0d143fe1 JB |
255 | if (res) |
256 | goto err_stop; | |
257 | ||
a3c9aa51 AY |
258 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
259 | local->fif_other_bss++; | |
a3c9aa51 | 260 | ieee80211_configure_filter(local); |
a3c9aa51 | 261 | |
0d143fe1 | 262 | ieee80211_start_mesh(sdata); |
e3b90ca2 IP |
263 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
264 | local->fif_pspoll++; | |
265 | ||
e3b90ca2 | 266 | ieee80211_configure_filter(local); |
a3c9aa51 | 267 | } |
e3b90ca2 | 268 | |
0d143fe1 JB |
269 | changed |= ieee80211_reset_erp_info(sdata); |
270 | ieee80211_bss_info_change_notify(sdata, changed); | |
0d143fe1 | 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 | |
8a5b33f5 | 323 | netif_tx_start_all_queues(dev); |
0d143fe1 JB |
324 | |
325 | return 0; | |
326 | err_del_interface: | |
1ed32e4f | 327 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 | 328 | err_stop: |
24487981 JB |
329 | if (!local->open_count) |
330 | drv_stop(local); | |
0d143fe1 JB |
331 | err_del_bss: |
332 | sdata->bss = NULL; | |
333 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
334 | list_del(&sdata->u.vlan.list); | |
335 | return res; | |
336 | } | |
337 | ||
338 | static int ieee80211_stop(struct net_device *dev) | |
339 | { | |
340 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
341 | struct ieee80211_local *local = sdata->local; | |
0d143fe1 | 342 | struct sta_info *sta; |
5061b0c2 JB |
343 | unsigned long flags; |
344 | struct sk_buff *skb, *tmp; | |
e8975581 | 345 | u32 hw_reconf_flags = 0; |
5061b0c2 | 346 | int i; |
0d143fe1 JB |
347 | |
348 | /* | |
349 | * Stop TX on this interface first. | |
350 | */ | |
8a5b33f5 | 351 | netif_tx_stop_all_queues(dev); |
0d143fe1 | 352 | |
af6b6374 JB |
353 | /* |
354 | * Purge work for this interface. | |
355 | */ | |
356 | ieee80211_work_purge(sdata); | |
357 | ||
0d143fe1 JB |
358 | /* |
359 | * Now delete all active aggregation sessions. | |
360 | */ | |
361 | rcu_read_lock(); | |
362 | ||
363 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
364 | if (sta->sdata == sdata) | |
2dace10e | 365 | ieee80211_sta_tear_down_BA_sessions(sta); |
0d143fe1 JB |
366 | } |
367 | ||
368 | rcu_read_unlock(); | |
369 | ||
370 | /* | |
371 | * Remove all stations associated with this interface. | |
372 | * | |
373 | * This must be done before calling ops->remove_interface() | |
374 | * because otherwise we can later invoke ops->sta_notify() | |
375 | * whenever the STAs are removed, and that invalidates driver | |
376 | * assumptions about always getting a vif pointer that is valid | |
377 | * (because if we remove a STA after ops->remove_interface() | |
378 | * the driver will have removed the vif info already!) | |
379 | * | |
380 | * We could relax this and only unlink the stations from the | |
381 | * hash table and list but keep them on a per-sdata list that | |
382 | * will be inserted back again when the interface is brought | |
383 | * up again, but I don't currently see a use case for that, | |
384 | * except with WDS which gets a STA entry created when it is | |
385 | * brought up. | |
386 | */ | |
387 | sta_info_flush(local, sdata); | |
388 | ||
389 | /* | |
390 | * Don't count this interface for promisc/allmulti while it | |
391 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
392 | * on the master interface which will sync these down to the | |
393 | * hardware as filter flags. | |
394 | */ | |
395 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
396 | atomic_dec(&local->iff_allmultis); | |
397 | ||
398 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
399 | atomic_dec(&local->iff_promiscs); | |
400 | ||
e3b90ca2 IP |
401 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
402 | local->fif_pspoll--; | |
403 | ||
3b8d81e0 JB |
404 | netif_addr_lock_bh(dev); |
405 | spin_lock_bh(&local->filter_lock); | |
22bedad3 | 406 | __hw_addr_unsync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 JB |
407 | spin_unlock_bh(&local->filter_lock); |
408 | netif_addr_unlock_bh(dev); | |
409 | ||
3ac64bee JB |
410 | ieee80211_configure_filter(local); |
411 | ||
7cbf0ba5 VN |
412 | del_timer_sync(&local->dynamic_ps_timer); |
413 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 JB |
414 | |
415 | /* APs need special treatment */ | |
416 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 417 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
418 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
419 | ||
420 | /* remove beacon */ | |
421 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
422 | synchronize_rcu(); | |
423 | kfree(old_beacon); | |
424 | ||
425 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 426 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
427 | u.vlan.list) |
428 | dev_close(vlan->dev); | |
429 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
430 | } | |
431 | ||
432 | local->open_count--; | |
433 | ||
434 | switch (sdata->vif.type) { | |
435 | case NL80211_IFTYPE_AP_VLAN: | |
436 | list_del(&sdata->u.vlan.list); | |
437 | /* no need to tell driver */ | |
438 | break; | |
439 | case NL80211_IFTYPE_MONITOR: | |
440 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
441 | local->cooked_mntrs--; | |
442 | break; | |
443 | } | |
444 | ||
445 | local->monitors--; | |
e8975581 | 446 | if (local->monitors == 0) { |
0869aea0 JB |
447 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
448 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 449 | } |
0d143fe1 JB |
450 | |
451 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
452 | local->fif_fcsfail--; | |
453 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
454 | local->fif_plcpfail--; | |
e3b90ca2 IP |
455 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
456 | local->fif_pspoll--; | |
0d143fe1 | 457 | local->fif_control--; |
e3b90ca2 | 458 | } |
0d143fe1 JB |
459 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
460 | local->fif_other_bss--; | |
461 | ||
0d143fe1 | 462 | ieee80211_configure_filter(local); |
0d143fe1 JB |
463 | break; |
464 | case NL80211_IFTYPE_STATION: | |
46900298 JB |
465 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
466 | del_timer_sync(&sdata->u.mgd.timer); | |
0e2b6286 JB |
467 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
468 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
0d143fe1 | 469 | /* |
0e2b6286 JB |
470 | * If any of the timers fired while we waited for it, it will |
471 | * have queued its work. Now the work will be running again | |
0d143fe1 JB |
472 | * but will not rearm the timer again because it checks |
473 | * whether the interface is running, which, at this point, | |
474 | * it no longer is. | |
475 | */ | |
46900298 JB |
476 | cancel_work_sync(&sdata->u.mgd.work); |
477 | cancel_work_sync(&sdata->u.mgd.chswitch_work); | |
0e2b6286 | 478 | cancel_work_sync(&sdata->u.mgd.monitor_work); |
1e4dcd01 | 479 | cancel_work_sync(&sdata->u.mgd.beacon_connection_loss_work); |
04de8381 | 480 | |
0d143fe1 JB |
481 | /* |
482 | * When we get here, the interface is marked down. | |
483 | * Call synchronize_rcu() to wait for the RX path | |
484 | * should it be using the interface and enqueuing | |
485 | * frames at this very time on another CPU. | |
486 | */ | |
487 | synchronize_rcu(); | |
46900298 | 488 | skb_queue_purge(&sdata->u.mgd.skb_queue); |
46900298 JB |
489 | /* fall through */ |
490 | case NL80211_IFTYPE_ADHOC: | |
491 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
46900298 JB |
492 | del_timer_sync(&sdata->u.ibss.timer); |
493 | cancel_work_sync(&sdata->u.ibss.work); | |
494 | synchronize_rcu(); | |
495 | skb_queue_purge(&sdata->u.ibss.skb_queue); | |
496 | } | |
0d143fe1 JB |
497 | /* fall through */ |
498 | case NL80211_IFTYPE_MESH_POINT: | |
499 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
500 | /* other_bss and allmulti are always set on mesh |
501 | * ifaces */ | |
502 | local->fif_other_bss--; | |
0d143fe1 | 503 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 | 504 | |
a3c9aa51 | 505 | ieee80211_configure_filter(local); |
a3c9aa51 | 506 | |
0d143fe1 JB |
507 | ieee80211_stop_mesh(sdata); |
508 | } | |
509 | /* fall through */ | |
510 | default: | |
15db0b7f JB |
511 | if (local->scan_sdata == sdata) |
512 | ieee80211_scan_cancel(local); | |
0d143fe1 | 513 | |
97af7432 BC |
514 | /* |
515 | * Disable beaconing for AP and mesh, IBSS can't | |
516 | * still be joined to a network at this point. | |
517 | */ | |
518 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
519 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { | |
520 | ieee80211_bss_info_change_notify(sdata, | |
521 | BSS_CHANGED_BEACON_ENABLED); | |
522 | } | |
523 | ||
ad0e2b5a JB |
524 | /* free all remaining keys, there shouldn't be any */ |
525 | ieee80211_free_keys(sdata); | |
1ed32e4f | 526 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 JB |
527 | } |
528 | ||
529 | sdata->bss = NULL; | |
530 | ||
5cff20e6 JB |
531 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
532 | ||
533 | ieee80211_recalc_ps(local, -1); | |
534 | ||
0d143fe1 | 535 | if (local->open_count == 0) { |
ea77f12f | 536 | ieee80211_clear_tx_pending(local); |
84f6a01c | 537 | ieee80211_stop_device(local); |
0d143fe1 | 538 | |
e8975581 JB |
539 | /* no reconfiguring after stop! */ |
540 | hw_reconf_flags = 0; | |
0d143fe1 JB |
541 | } |
542 | ||
e8975581 JB |
543 | /* do after stop to avoid reconfiguring when we stop anyway */ |
544 | if (hw_reconf_flags) | |
545 | ieee80211_hw_config(local, hw_reconf_flags); | |
546 | ||
5061b0c2 JB |
547 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
548 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
549 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
550 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
551 | if (info->control.vif == &sdata->vif) { | |
552 | __skb_unlink(skb, &local->pending[i]); | |
553 | dev_kfree_skb_irq(skb); | |
554 | } | |
555 | } | |
556 | } | |
557 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
558 | ||
0d143fe1 JB |
559 | return 0; |
560 | } | |
561 | ||
562 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
563 | { | |
0d143fe1 | 564 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 565 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
566 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
567 | ||
568 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
569 | promisc = !!(dev->flags & IFF_PROMISC); | |
570 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
571 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
572 | ||
573 | if (allmulti != sdata_allmulti) { | |
574 | if (dev->flags & IFF_ALLMULTI) | |
575 | atomic_inc(&local->iff_allmultis); | |
576 | else | |
577 | atomic_dec(&local->iff_allmultis); | |
578 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
579 | } | |
580 | ||
581 | if (promisc != sdata_promisc) { | |
582 | if (dev->flags & IFF_PROMISC) | |
583 | atomic_inc(&local->iff_promiscs); | |
584 | else | |
585 | atomic_dec(&local->iff_promiscs); | |
586 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
587 | } | |
3b8d81e0 | 588 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 589 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 590 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 591 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
592 | } |
593 | ||
75636525 JB |
594 | /* |
595 | * Called when the netdev is removed or, by the code below, before | |
596 | * the interface type changes. | |
597 | */ | |
598 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 599 | { |
75636525 JB |
600 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
601 | struct ieee80211_local *local = sdata->local; | |
602 | struct beacon_data *beacon; | |
603 | struct sk_buff *skb; | |
604 | int flushed; | |
f0706e82 JB |
605 | int i; |
606 | ||
75636525 JB |
607 | /* free extra data */ |
608 | ieee80211_free_keys(sdata); | |
609 | ||
aee14ceb JM |
610 | ieee80211_debugfs_remove_netdev(sdata); |
611 | ||
f0706e82 | 612 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
613 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
614 | sdata->fragment_next = 0; | |
11a843b7 | 615 | |
75636525 | 616 | switch (sdata->vif.type) { |
05c914fe | 617 | case NL80211_IFTYPE_AP: |
75636525 JB |
618 | beacon = sdata->u.ap.beacon; |
619 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
620 | synchronize_rcu(); | |
621 | kfree(beacon); | |
3e122be0 | 622 | |
75636525 JB |
623 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
624 | local->total_ps_buffered--; | |
625 | dev_kfree_skb(skb); | |
626 | } | |
627 | ||
628 | break; | |
05c914fe | 629 | case NL80211_IFTYPE_MESH_POINT: |
75636525 | 630 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 631 | mesh_rmc_free(sdata); |
472dbc45 | 632 | break; |
05c914fe | 633 | case NL80211_IFTYPE_ADHOC: |
af8cdcd8 JB |
634 | if (WARN_ON(sdata->u.ibss.presp)) |
635 | kfree_skb(sdata->u.ibss.presp); | |
46900298 JB |
636 | break; |
637 | case NL80211_IFTYPE_STATION: | |
05c914fe JB |
638 | case NL80211_IFTYPE_WDS: |
639 | case NL80211_IFTYPE_AP_VLAN: | |
640 | case NL80211_IFTYPE_MONITOR: | |
75636525 | 641 | break; |
05c914fe JB |
642 | case NL80211_IFTYPE_UNSPECIFIED: |
643 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
644 | BUG(); |
645 | break; | |
646 | } | |
647 | ||
648 | flushed = sta_info_flush(local, sdata); | |
649 | WARN_ON(flushed); | |
f0706e82 JB |
650 | } |
651 | ||
cf0277e7 JB |
652 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
653 | struct sk_buff *skb) | |
654 | { | |
655 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
656 | } | |
657 | ||
587e729e JB |
658 | static const struct net_device_ops ieee80211_dataif_ops = { |
659 | .ndo_open = ieee80211_open, | |
660 | .ndo_stop = ieee80211_stop, | |
661 | .ndo_uninit = ieee80211_teardown_sdata, | |
662 | .ndo_start_xmit = ieee80211_subif_start_xmit, | |
663 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
664 | .ndo_change_mtu = ieee80211_change_mtu, | |
47846c9b | 665 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 666 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
667 | }; |
668 | ||
cf0277e7 JB |
669 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
670 | struct sk_buff *skb) | |
671 | { | |
672 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
673 | struct ieee80211_local *local = sdata->local; | |
674 | struct ieee80211_hdr *hdr; | |
675 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
193e70ef | 676 | u8 *p; |
cf0277e7 JB |
677 | |
678 | if (local->hw.queues < 4) | |
679 | return 0; | |
680 | ||
681 | if (skb->len < 4 || | |
b49bb574 | 682 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
683 | return 0; /* doesn't matter, frame will be dropped */ |
684 | ||
b49bb574 | 685 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 686 | |
861a57cd | 687 | if (!ieee80211_is_data(hdr->frame_control)) { |
cf0277e7 JB |
688 | skb->priority = 7; |
689 | return ieee802_1d_to_ac[skb->priority]; | |
690 | } | |
861a57cd FF |
691 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
692 | skb->priority = 0; | |
693 | return ieee802_1d_to_ac[skb->priority]; | |
694 | } | |
cf0277e7 | 695 | |
193e70ef FF |
696 | p = ieee80211_get_qos_ctl(hdr); |
697 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
698 | ||
cf0277e7 JB |
699 | return ieee80211_downgrade_queue(local, skb); |
700 | } | |
701 | ||
587e729e JB |
702 | static const struct net_device_ops ieee80211_monitorif_ops = { |
703 | .ndo_open = ieee80211_open, | |
704 | .ndo_stop = ieee80211_stop, | |
705 | .ndo_uninit = ieee80211_teardown_sdata, | |
706 | .ndo_start_xmit = ieee80211_monitor_start_xmit, | |
707 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
708 | .ndo_change_mtu = ieee80211_change_mtu, | |
709 | .ndo_set_mac_address = eth_mac_addr, | |
cf0277e7 | 710 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
711 | }; |
712 | ||
713 | static void ieee80211_if_setup(struct net_device *dev) | |
714 | { | |
715 | ether_setup(dev); | |
716 | dev->netdev_ops = &ieee80211_dataif_ops; | |
587e729e JB |
717 | dev->destructor = free_netdev; |
718 | } | |
719 | ||
75636525 JB |
720 | /* |
721 | * Helper function to initialise an interface to a specific type. | |
722 | */ | |
723 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 724 | enum nl80211_iftype type) |
f0706e82 | 725 | { |
75636525 JB |
726 | /* clear type-dependent union */ |
727 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
728 | ||
729 | /* and set some type-dependent values */ | |
730 | sdata->vif.type = type; | |
587e729e | 731 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
60719ffd | 732 | sdata->wdev.iftype = type; |
75636525 JB |
733 | |
734 | /* only monitor differs */ | |
735 | sdata->dev->type = ARPHRD_ETHER; | |
736 | ||
737 | switch (type) { | |
05c914fe | 738 | case NL80211_IFTYPE_AP: |
75636525 JB |
739 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
740 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
741 | break; | |
05c914fe | 742 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 743 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 744 | break; |
46900298 JB |
745 | case NL80211_IFTYPE_ADHOC: |
746 | ieee80211_ibss_setup_sdata(sdata); | |
747 | break; | |
05c914fe | 748 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
749 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
750 | ieee80211_mesh_init_sdata(sdata); | |
751 | break; | |
05c914fe | 752 | case NL80211_IFTYPE_MONITOR: |
75636525 | 753 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 754 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
755 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
756 | MONITOR_FLAG_OTHER_BSS; | |
757 | break; | |
05c914fe JB |
758 | case NL80211_IFTYPE_WDS: |
759 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 760 | break; |
05c914fe JB |
761 | case NL80211_IFTYPE_UNSPECIFIED: |
762 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
763 | BUG(); |
764 | break; | |
765 | } | |
766 | ||
767 | ieee80211_debugfs_add_netdev(sdata); | |
768 | } | |
769 | ||
f3947e2d | 770 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 771 | enum nl80211_iftype type) |
75636525 | 772 | { |
f3947e2d JB |
773 | ASSERT_RTNL(); |
774 | ||
775 | if (type == sdata->vif.type) | |
776 | return 0; | |
777 | ||
e60c7744 | 778 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
779 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
780 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
781 | return -EOPNOTSUPP; |
782 | ||
f3947e2d JB |
783 | /* |
784 | * We could, here, on changes between IBSS/STA/MESH modes, | |
785 | * invoke an MLME function instead that disassociates etc. | |
786 | * and goes into the requested mode. | |
787 | */ | |
788 | ||
9607e6b6 | 789 | if (ieee80211_sdata_running(sdata)) |
f3947e2d JB |
790 | return -EBUSY; |
791 | ||
75636525 JB |
792 | /* Purge and reset type-dependent state. */ |
793 | ieee80211_teardown_sdata(sdata->dev); | |
794 | ieee80211_setup_sdata(sdata, type); | |
795 | ||
796 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 797 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
798 | ieee80211_mandatory_rates(sdata->local, |
799 | sdata->local->hw.conf.channel->band); | |
75636525 | 800 | sdata->drop_unencrypted = 0; |
9bc383de JB |
801 | if (type == NL80211_IFTYPE_STATION) |
802 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
803 | |
804 | return 0; | |
f0706e82 JB |
805 | } |
806 | ||
fa9029f8 JB |
807 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
808 | struct net_device *dev, | |
809 | enum nl80211_iftype type) | |
810 | { | |
811 | struct ieee80211_sub_if_data *sdata; | |
812 | u64 mask, start, addr, val, inc; | |
813 | u8 *m; | |
814 | u8 tmp_addr[ETH_ALEN]; | |
815 | int i; | |
816 | ||
817 | /* default ... something at least */ | |
818 | memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
819 | ||
820 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
821 | local->hw.wiphy->n_addresses <= 1) | |
822 | return; | |
823 | ||
824 | ||
825 | mutex_lock(&local->iflist_mtx); | |
826 | ||
827 | switch (type) { | |
828 | case NL80211_IFTYPE_MONITOR: | |
829 | /* doesn't matter */ | |
830 | break; | |
831 | case NL80211_IFTYPE_WDS: | |
832 | case NL80211_IFTYPE_AP_VLAN: | |
833 | /* match up with an AP interface */ | |
834 | list_for_each_entry(sdata, &local->interfaces, list) { | |
835 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
836 | continue; | |
837 | memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); | |
838 | break; | |
839 | } | |
840 | /* keep default if no AP interface present */ | |
841 | break; | |
842 | default: | |
843 | /* assign a new address if possible -- try n_addresses first */ | |
844 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
845 | bool used = false; | |
846 | ||
847 | list_for_each_entry(sdata, &local->interfaces, list) { | |
848 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
849 | sdata->vif.addr, ETH_ALEN) == 0) { | |
850 | used = true; | |
851 | break; | |
852 | } | |
853 | } | |
854 | ||
855 | if (!used) { | |
856 | memcpy(dev->perm_addr, | |
857 | local->hw.wiphy->addresses[i].addr, | |
858 | ETH_ALEN); | |
859 | break; | |
860 | } | |
861 | } | |
862 | ||
863 | /* try mask if available */ | |
864 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
865 | break; | |
866 | ||
867 | m = local->hw.wiphy->addr_mask; | |
868 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
869 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
870 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
871 | ||
872 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
873 | /* not a contiguous mask ... not handled now! */ | |
874 | printk(KERN_DEBUG "not contiguous\n"); | |
875 | break; | |
876 | } | |
877 | ||
878 | m = local->hw.wiphy->perm_addr; | |
879 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
880 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
881 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
882 | ||
883 | inc = 1ULL<<__ffs64(mask); | |
884 | val = (start & mask); | |
885 | addr = (start & ~mask) | (val & mask); | |
886 | do { | |
887 | bool used = false; | |
888 | ||
889 | tmp_addr[5] = addr >> 0*8; | |
890 | tmp_addr[4] = addr >> 1*8; | |
891 | tmp_addr[3] = addr >> 2*8; | |
892 | tmp_addr[2] = addr >> 3*8; | |
893 | tmp_addr[1] = addr >> 4*8; | |
894 | tmp_addr[0] = addr >> 5*8; | |
895 | ||
896 | val += inc; | |
897 | ||
898 | list_for_each_entry(sdata, &local->interfaces, list) { | |
899 | if (memcmp(tmp_addr, sdata->vif.addr, | |
900 | ETH_ALEN) == 0) { | |
901 | used = true; | |
902 | break; | |
903 | } | |
904 | } | |
905 | ||
906 | if (!used) { | |
907 | memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); | |
908 | break; | |
909 | } | |
910 | addr = (start & ~mask) | (val & mask); | |
911 | } while (addr != start); | |
912 | ||
913 | break; | |
914 | } | |
915 | ||
916 | mutex_unlock(&local->iflist_mtx); | |
917 | } | |
918 | ||
3e122be0 | 919 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 920 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 921 | struct vif_params *params) |
f0706e82 JB |
922 | { |
923 | struct net_device *ndev; | |
f0706e82 | 924 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 925 | int ret, i; |
f0706e82 JB |
926 | |
927 | ASSERT_RTNL(); | |
75636525 | 928 | |
cf0277e7 JB |
929 | ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, |
930 | name, ieee80211_if_setup, local->hw.queues); | |
f0706e82 JB |
931 | if (!ndev) |
932 | return -ENOMEM; | |
a272a720 | 933 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
f0706e82 | 934 | |
f3994ece JB |
935 | ndev->needed_headroom = local->tx_headroom + |
936 | 4*6 /* four MAC addresses */ | |
937 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
938 | + 6 /* mesh */ | |
939 | + 8 /* rfc1042/bridge tunnel */ | |
940 | - ETH_HLEN /* ethernet hard_header_len */ | |
941 | + IEEE80211_ENCRYPT_HEADROOM; | |
942 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
943 | ||
f0706e82 JB |
944 | ret = dev_alloc_name(ndev, ndev->name); |
945 | if (ret < 0) | |
946 | goto fail; | |
947 | ||
fa9029f8 JB |
948 | ieee80211_assign_perm_addr(local, ndev, type); |
949 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
f0706e82 JB |
950 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
951 | ||
3e122be0 JB |
952 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
953 | sdata = netdev_priv(ndev); | |
f0706e82 | 954 | ndev->ieee80211_ptr = &sdata->wdev; |
47846c9b JB |
955 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
956 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
75636525 JB |
957 | |
958 | /* initialise type-independent data */ | |
f0706e82 | 959 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 960 | sdata->local = local; |
75636525 JB |
961 | sdata->dev = ndev; |
962 | ||
963 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
964 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
965 | ||
966 | INIT_LIST_HEAD(&sdata->key_list); | |
967 | ||
37eb0b16 JM |
968 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
969 | struct ieee80211_supported_band *sband; | |
970 | sband = local->hw.wiphy->bands[i]; | |
971 | sdata->rc_rateidx_mask[i] = | |
972 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
973 | } | |
75636525 JB |
974 | |
975 | /* setup type-dependent data */ | |
976 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 977 | |
9bc383de JB |
978 | if (params) { |
979 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
980 | if (type == NL80211_IFTYPE_STATION) | |
981 | sdata->u.mgd.use_4addr = params->use_4addr; | |
982 | } | |
983 | ||
f0706e82 JB |
984 | ret = register_netdevice(ndev); |
985 | if (ret) | |
986 | goto fail; | |
987 | ||
902acc78 JB |
988 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
989 | params && params->mesh_id_len) | |
472dbc45 JB |
990 | ieee80211_sdata_set_mesh_id(sdata, |
991 | params->mesh_id_len, | |
992 | params->mesh_id); | |
ee385855 | 993 | |
c771c9d8 | 994 | mutex_lock(&local->iflist_mtx); |
79010420 | 995 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 996 | mutex_unlock(&local->iflist_mtx); |
79010420 | 997 | |
f0706e82 JB |
998 | if (new_dev) |
999 | *new_dev = ndev; | |
f0706e82 | 1000 | |
f0706e82 JB |
1001 | return 0; |
1002 | ||
75636525 | 1003 | fail: |
f0706e82 JB |
1004 | free_netdev(ndev); |
1005 | return ret; | |
1006 | } | |
1007 | ||
f698d856 | 1008 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1009 | { |
f0706e82 | 1010 | ASSERT_RTNL(); |
11a843b7 | 1011 | |
c771c9d8 | 1012 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1013 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1014 | mutex_unlock(&sdata->local->iflist_mtx); |
1015 | ||
75636525 | 1016 | synchronize_rcu(); |
f698d856 | 1017 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
1018 | } |
1019 | ||
75636525 JB |
1020 | /* |
1021 | * Remove all interfaces, may only be called at hardware unregistration | |
1022 | * time because it doesn't do RCU-safe list removals. | |
1023 | */ | |
1024 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1025 | { |
75636525 | 1026 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1027 | LIST_HEAD(unreg_list); |
f0706e82 JB |
1028 | |
1029 | ASSERT_RTNL(); | |
1030 | ||
efe117ab | 1031 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1032 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1033 | list_del(&sdata->list); | |
c771c9d8 | 1034 | |
efe117ab | 1035 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
f0706e82 | 1036 | } |
efe117ab ED |
1037 | mutex_unlock(&local->iflist_mtx); |
1038 | unregister_netdevice_many(&unreg_list); | |
f0706e82 | 1039 | } |
5cff20e6 JB |
1040 | |
1041 | static u32 ieee80211_idle_off(struct ieee80211_local *local, | |
1042 | const char *reason) | |
1043 | { | |
1044 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
1045 | return 0; | |
1046 | ||
1047 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1048 | printk(KERN_DEBUG "%s: device no longer idle - %s\n", | |
1049 | wiphy_name(local->hw.wiphy), reason); | |
1050 | #endif | |
1051 | ||
1052 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
1053 | return IEEE80211_CONF_CHANGE_IDLE; | |
1054 | } | |
1055 | ||
1056 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
1057 | { | |
1058 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
1059 | return 0; | |
1060 | ||
1061 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1062 | printk(KERN_DEBUG "%s: device now idle\n", | |
1063 | wiphy_name(local->hw.wiphy)); | |
1064 | #endif | |
1065 | ||
a80f7c0b JB |
1066 | drv_flush(local, false); |
1067 | ||
5cff20e6 JB |
1068 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
1069 | return IEEE80211_CONF_CHANGE_IDLE; | |
1070 | } | |
1071 | ||
1072 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
1073 | { | |
1074 | struct ieee80211_sub_if_data *sdata; | |
1075 | int count = 0; | |
1076 | ||
af6b6374 JB |
1077 | if (!list_empty(&local->work_list)) |
1078 | return ieee80211_idle_off(local, "working"); | |
1079 | ||
fbe9c429 | 1080 | if (local->scanning) |
5cff20e6 JB |
1081 | return ieee80211_idle_off(local, "scanning"); |
1082 | ||
1083 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1084 | if (!ieee80211_sdata_running(sdata)) |
5cff20e6 JB |
1085 | continue; |
1086 | /* do not count disabled managed interfaces */ | |
1087 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
af6b6374 | 1088 | !sdata->u.mgd.associated) |
5cff20e6 JB |
1089 | continue; |
1090 | /* do not count unused IBSS interfaces */ | |
1091 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
1092 | !sdata->u.ibss.ssid_len) | |
1093 | continue; | |
1094 | /* count everything else */ | |
1095 | count++; | |
1096 | } | |
1097 | ||
1098 | if (!count) | |
1099 | return ieee80211_idle_on(local); | |
1100 | else | |
1101 | return ieee80211_idle_off(local, "in use"); | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
1107 | { | |
1108 | u32 chg; | |
1109 | ||
1110 | mutex_lock(&local->iflist_mtx); | |
1111 | chg = __ieee80211_recalc_idle(local); | |
1112 | mutex_unlock(&local->iflist_mtx); | |
58905ca5 JB |
1113 | if (chg) |
1114 | ieee80211_hw_config(local, chg); | |
5cff20e6 | 1115 | } |
47846c9b JB |
1116 | |
1117 | static int netdev_notify(struct notifier_block *nb, | |
1118 | unsigned long state, | |
1119 | void *ndev) | |
1120 | { | |
1121 | struct net_device *dev = ndev; | |
1122 | struct ieee80211_sub_if_data *sdata; | |
1123 | ||
1124 | if (state != NETDEV_CHANGENAME) | |
1125 | return 0; | |
1126 | ||
1127 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1128 | return 0; | |
1129 | ||
1130 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1131 | return 0; | |
1132 | ||
1133 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1134 | ||
2f5265e6 | 1135 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1136 | |
1137 | ieee80211_debugfs_rename_netdev(sdata); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | static struct notifier_block mac80211_netdev_notifier = { | |
1142 | .notifier_call = netdev_notify, | |
1143 | }; | |
1144 | ||
1145 | int ieee80211_iface_init(void) | |
1146 | { | |
1147 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1148 | } | |
1149 | ||
1150 | void ieee80211_iface_exit(void) | |
1151 | { | |
1152 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1153 | } |