]>
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 | */ | |
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; | |
5061b0c2 JB |
342 | unsigned long flags; |
343 | struct sk_buff *skb, *tmp; | |
e8975581 | 344 | u32 hw_reconf_flags = 0; |
5061b0c2 | 345 | int i; |
0d143fe1 JB |
346 | |
347 | /* | |
348 | * Stop TX on this interface first. | |
349 | */ | |
8a5b33f5 | 350 | netif_tx_stop_all_queues(dev); |
0d143fe1 | 351 | |
af6b6374 JB |
352 | /* |
353 | * Purge work for this interface. | |
354 | */ | |
355 | ieee80211_work_purge(sdata); | |
356 | ||
0d143fe1 JB |
357 | /* |
358 | * Remove all stations associated with this interface. | |
359 | * | |
360 | * This must be done before calling ops->remove_interface() | |
361 | * because otherwise we can later invoke ops->sta_notify() | |
362 | * whenever the STAs are removed, and that invalidates driver | |
363 | * assumptions about always getting a vif pointer that is valid | |
364 | * (because if we remove a STA after ops->remove_interface() | |
365 | * the driver will have removed the vif info already!) | |
366 | * | |
367 | * We could relax this and only unlink the stations from the | |
368 | * hash table and list but keep them on a per-sdata list that | |
369 | * will be inserted back again when the interface is brought | |
370 | * up again, but I don't currently see a use case for that, | |
371 | * except with WDS which gets a STA entry created when it is | |
372 | * brought up. | |
373 | */ | |
374 | sta_info_flush(local, sdata); | |
375 | ||
376 | /* | |
377 | * Don't count this interface for promisc/allmulti while it | |
378 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
379 | * on the master interface which will sync these down to the | |
380 | * hardware as filter flags. | |
381 | */ | |
382 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
383 | atomic_dec(&local->iff_allmultis); | |
384 | ||
385 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
386 | atomic_dec(&local->iff_promiscs); | |
387 | ||
e3b90ca2 IP |
388 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
389 | local->fif_pspoll--; | |
390 | ||
3b8d81e0 JB |
391 | netif_addr_lock_bh(dev); |
392 | spin_lock_bh(&local->filter_lock); | |
22bedad3 | 393 | __hw_addr_unsync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 JB |
394 | spin_unlock_bh(&local->filter_lock); |
395 | netif_addr_unlock_bh(dev); | |
396 | ||
3ac64bee JB |
397 | ieee80211_configure_filter(local); |
398 | ||
7cbf0ba5 VN |
399 | del_timer_sync(&local->dynamic_ps_timer); |
400 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 JB |
401 | |
402 | /* APs need special treatment */ | |
403 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 404 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
405 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
406 | ||
407 | /* remove beacon */ | |
408 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
409 | synchronize_rcu(); | |
410 | kfree(old_beacon); | |
411 | ||
412 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 413 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
414 | u.vlan.list) |
415 | dev_close(vlan->dev); | |
416 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
417 | } | |
418 | ||
419 | local->open_count--; | |
420 | ||
421 | switch (sdata->vif.type) { | |
422 | case NL80211_IFTYPE_AP_VLAN: | |
423 | list_del(&sdata->u.vlan.list); | |
424 | /* no need to tell driver */ | |
425 | break; | |
426 | case NL80211_IFTYPE_MONITOR: | |
427 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
428 | local->cooked_mntrs--; | |
429 | break; | |
430 | } | |
431 | ||
432 | local->monitors--; | |
e8975581 | 433 | if (local->monitors == 0) { |
0869aea0 JB |
434 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
435 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 436 | } |
0d143fe1 JB |
437 | |
438 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
439 | local->fif_fcsfail--; | |
440 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
441 | local->fif_plcpfail--; | |
e3b90ca2 IP |
442 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
443 | local->fif_pspoll--; | |
0d143fe1 | 444 | local->fif_control--; |
e3b90ca2 | 445 | } |
0d143fe1 JB |
446 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
447 | local->fif_other_bss--; | |
448 | ||
0d143fe1 | 449 | ieee80211_configure_filter(local); |
0d143fe1 JB |
450 | break; |
451 | case NL80211_IFTYPE_STATION: | |
46900298 JB |
452 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
453 | del_timer_sync(&sdata->u.mgd.timer); | |
0e2b6286 JB |
454 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
455 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
0d143fe1 | 456 | /* |
0e2b6286 JB |
457 | * If any of the timers fired while we waited for it, it will |
458 | * have queued its work. Now the work will be running again | |
0d143fe1 JB |
459 | * but will not rearm the timer again because it checks |
460 | * whether the interface is running, which, at this point, | |
461 | * it no longer is. | |
462 | */ | |
46900298 | 463 | cancel_work_sync(&sdata->u.mgd.chswitch_work); |
0e2b6286 | 464 | cancel_work_sync(&sdata->u.mgd.monitor_work); |
1e4dcd01 | 465 | cancel_work_sync(&sdata->u.mgd.beacon_connection_loss_work); |
04de8381 | 466 | |
46900298 JB |
467 | /* fall through */ |
468 | case NL80211_IFTYPE_ADHOC: | |
64592c8f | 469 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
46900298 | 470 | del_timer_sync(&sdata->u.ibss.timer); |
0d143fe1 JB |
471 | /* fall through */ |
472 | case NL80211_IFTYPE_MESH_POINT: | |
473 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
474 | /* other_bss and allmulti are always set on mesh |
475 | * ifaces */ | |
476 | local->fif_other_bss--; | |
0d143fe1 | 477 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 | 478 | |
a3c9aa51 | 479 | ieee80211_configure_filter(local); |
a3c9aa51 | 480 | |
0d143fe1 JB |
481 | ieee80211_stop_mesh(sdata); |
482 | } | |
483 | /* fall through */ | |
484 | default: | |
c1475ca9 | 485 | flush_work(&sdata->work); |
35f20c14 JB |
486 | /* |
487 | * When we get here, the interface is marked down. | |
488 | * Call synchronize_rcu() to wait for the RX path | |
489 | * should it be using the interface and enqueuing | |
490 | * frames at this very time on another CPU. | |
491 | */ | |
492 | synchronize_rcu(); | |
493 | skb_queue_purge(&sdata->skb_queue); | |
494 | ||
15db0b7f JB |
495 | if (local->scan_sdata == sdata) |
496 | ieee80211_scan_cancel(local); | |
0d143fe1 | 497 | |
97af7432 BC |
498 | /* |
499 | * Disable beaconing for AP and mesh, IBSS can't | |
500 | * still be joined to a network at this point. | |
501 | */ | |
502 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
503 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { | |
504 | ieee80211_bss_info_change_notify(sdata, | |
505 | BSS_CHANGED_BEACON_ENABLED); | |
506 | } | |
507 | ||
ad0e2b5a JB |
508 | /* free all remaining keys, there shouldn't be any */ |
509 | ieee80211_free_keys(sdata); | |
1ed32e4f | 510 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 JB |
511 | } |
512 | ||
513 | sdata->bss = NULL; | |
514 | ||
5cff20e6 JB |
515 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
516 | ||
517 | ieee80211_recalc_ps(local, -1); | |
518 | ||
0d143fe1 | 519 | if (local->open_count == 0) { |
ea77f12f | 520 | ieee80211_clear_tx_pending(local); |
84f6a01c | 521 | ieee80211_stop_device(local); |
0d143fe1 | 522 | |
e8975581 JB |
523 | /* no reconfiguring after stop! */ |
524 | hw_reconf_flags = 0; | |
0d143fe1 JB |
525 | } |
526 | ||
e8975581 JB |
527 | /* do after stop to avoid reconfiguring when we stop anyway */ |
528 | if (hw_reconf_flags) | |
529 | ieee80211_hw_config(local, hw_reconf_flags); | |
530 | ||
5061b0c2 JB |
531 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
532 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
533 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
534 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
535 | if (info->control.vif == &sdata->vif) { | |
536 | __skb_unlink(skb, &local->pending[i]); | |
537 | dev_kfree_skb_irq(skb); | |
538 | } | |
539 | } | |
540 | } | |
541 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
542 | ||
0d143fe1 JB |
543 | return 0; |
544 | } | |
545 | ||
546 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
547 | { | |
0d143fe1 | 548 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 549 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
550 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
551 | ||
552 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
553 | promisc = !!(dev->flags & IFF_PROMISC); | |
554 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
555 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
556 | ||
557 | if (allmulti != sdata_allmulti) { | |
558 | if (dev->flags & IFF_ALLMULTI) | |
559 | atomic_inc(&local->iff_allmultis); | |
560 | else | |
561 | atomic_dec(&local->iff_allmultis); | |
562 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
563 | } | |
564 | ||
565 | if (promisc != sdata_promisc) { | |
566 | if (dev->flags & IFF_PROMISC) | |
567 | atomic_inc(&local->iff_promiscs); | |
568 | else | |
569 | atomic_dec(&local->iff_promiscs); | |
570 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
571 | } | |
3b8d81e0 | 572 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 573 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 574 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 575 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
576 | } |
577 | ||
75636525 JB |
578 | /* |
579 | * Called when the netdev is removed or, by the code below, before | |
580 | * the interface type changes. | |
581 | */ | |
582 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 583 | { |
75636525 JB |
584 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
585 | struct ieee80211_local *local = sdata->local; | |
586 | struct beacon_data *beacon; | |
587 | struct sk_buff *skb; | |
588 | int flushed; | |
f0706e82 JB |
589 | int i; |
590 | ||
75636525 JB |
591 | /* free extra data */ |
592 | ieee80211_free_keys(sdata); | |
593 | ||
aee14ceb JM |
594 | ieee80211_debugfs_remove_netdev(sdata); |
595 | ||
f0706e82 | 596 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
597 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
598 | sdata->fragment_next = 0; | |
11a843b7 | 599 | |
75636525 | 600 | switch (sdata->vif.type) { |
05c914fe | 601 | case NL80211_IFTYPE_AP: |
75636525 JB |
602 | beacon = sdata->u.ap.beacon; |
603 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
604 | synchronize_rcu(); | |
605 | kfree(beacon); | |
3e122be0 | 606 | |
75636525 JB |
607 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
608 | local->total_ps_buffered--; | |
609 | dev_kfree_skb(skb); | |
610 | } | |
611 | ||
612 | break; | |
05c914fe | 613 | case NL80211_IFTYPE_MESH_POINT: |
75636525 | 614 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 615 | mesh_rmc_free(sdata); |
472dbc45 | 616 | break; |
05c914fe | 617 | case NL80211_IFTYPE_ADHOC: |
af8cdcd8 JB |
618 | if (WARN_ON(sdata->u.ibss.presp)) |
619 | kfree_skb(sdata->u.ibss.presp); | |
46900298 JB |
620 | break; |
621 | case NL80211_IFTYPE_STATION: | |
05c914fe JB |
622 | case NL80211_IFTYPE_WDS: |
623 | case NL80211_IFTYPE_AP_VLAN: | |
624 | case NL80211_IFTYPE_MONITOR: | |
75636525 | 625 | break; |
05c914fe JB |
626 | case NL80211_IFTYPE_UNSPECIFIED: |
627 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
628 | BUG(); |
629 | break; | |
630 | } | |
631 | ||
632 | flushed = sta_info_flush(local, sdata); | |
633 | WARN_ON(flushed); | |
f0706e82 JB |
634 | } |
635 | ||
cf0277e7 JB |
636 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
637 | struct sk_buff *skb) | |
638 | { | |
639 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
640 | } | |
641 | ||
587e729e JB |
642 | static const struct net_device_ops ieee80211_dataif_ops = { |
643 | .ndo_open = ieee80211_open, | |
644 | .ndo_stop = ieee80211_stop, | |
645 | .ndo_uninit = ieee80211_teardown_sdata, | |
646 | .ndo_start_xmit = ieee80211_subif_start_xmit, | |
647 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
648 | .ndo_change_mtu = ieee80211_change_mtu, | |
47846c9b | 649 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 650 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
651 | }; |
652 | ||
cf0277e7 JB |
653 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
654 | struct sk_buff *skb) | |
655 | { | |
656 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
657 | struct ieee80211_local *local = sdata->local; | |
658 | struct ieee80211_hdr *hdr; | |
659 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
193e70ef | 660 | u8 *p; |
cf0277e7 JB |
661 | |
662 | if (local->hw.queues < 4) | |
663 | return 0; | |
664 | ||
665 | if (skb->len < 4 || | |
b49bb574 | 666 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
667 | return 0; /* doesn't matter, frame will be dropped */ |
668 | ||
b49bb574 | 669 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 670 | |
861a57cd | 671 | if (!ieee80211_is_data(hdr->frame_control)) { |
cf0277e7 JB |
672 | skb->priority = 7; |
673 | return ieee802_1d_to_ac[skb->priority]; | |
674 | } | |
861a57cd FF |
675 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
676 | skb->priority = 0; | |
677 | return ieee802_1d_to_ac[skb->priority]; | |
678 | } | |
cf0277e7 | 679 | |
193e70ef FF |
680 | p = ieee80211_get_qos_ctl(hdr); |
681 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
682 | ||
cf0277e7 JB |
683 | return ieee80211_downgrade_queue(local, skb); |
684 | } | |
685 | ||
587e729e JB |
686 | static const struct net_device_ops ieee80211_monitorif_ops = { |
687 | .ndo_open = ieee80211_open, | |
688 | .ndo_stop = ieee80211_stop, | |
689 | .ndo_uninit = ieee80211_teardown_sdata, | |
690 | .ndo_start_xmit = ieee80211_monitor_start_xmit, | |
691 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
692 | .ndo_change_mtu = ieee80211_change_mtu, | |
693 | .ndo_set_mac_address = eth_mac_addr, | |
cf0277e7 | 694 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
695 | }; |
696 | ||
697 | static void ieee80211_if_setup(struct net_device *dev) | |
698 | { | |
699 | ether_setup(dev); | |
700 | dev->netdev_ops = &ieee80211_dataif_ops; | |
587e729e JB |
701 | dev->destructor = free_netdev; |
702 | } | |
703 | ||
1fa57d01 JB |
704 | static void ieee80211_iface_work(struct work_struct *work) |
705 | { | |
706 | struct ieee80211_sub_if_data *sdata = | |
707 | container_of(work, struct ieee80211_sub_if_data, work); | |
708 | struct ieee80211_local *local = sdata->local; | |
709 | struct sk_buff *skb; | |
344eec67 | 710 | struct sta_info *sta; |
c1475ca9 | 711 | struct ieee80211_ra_tid *ra_tid; |
1fa57d01 JB |
712 | |
713 | if (!ieee80211_sdata_running(sdata)) | |
714 | return; | |
715 | ||
716 | if (local->scanning) | |
717 | return; | |
718 | ||
719 | /* | |
720 | * ieee80211_queue_work() should have picked up most cases, | |
721 | * here we'll pick the rest. | |
722 | */ | |
723 | if (WARN(local->suspended, | |
724 | "interface work scheduled while going to suspend\n")) | |
725 | return; | |
726 | ||
727 | /* first process frames */ | |
728 | while ((skb = skb_dequeue(&sdata->skb_queue))) { | |
bed7ee6e JB |
729 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
730 | ||
c1475ca9 JB |
731 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
732 | ra_tid = (void *)&skb->cb; | |
733 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
734 | ra_tid->tid); | |
735 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { | |
736 | ra_tid = (void *)&skb->cb; | |
737 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
738 | ra_tid->tid); | |
739 | } else if (ieee80211_is_action(mgmt->frame_control) && | |
740 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { | |
bed7ee6e | 741 | int len = skb->len; |
bed7ee6e JB |
742 | |
743 | rcu_read_lock(); | |
744 | sta = sta_info_get(sdata, mgmt->sa); | |
745 | if (sta) { | |
746 | switch (mgmt->u.action.u.addba_req.action_code) { | |
747 | case WLAN_ACTION_ADDBA_REQ: | |
748 | ieee80211_process_addba_request( | |
749 | local, sta, mgmt, len); | |
750 | break; | |
751 | case WLAN_ACTION_ADDBA_RESP: | |
752 | ieee80211_process_addba_resp(local, sta, | |
753 | mgmt, len); | |
754 | break; | |
755 | case WLAN_ACTION_DELBA: | |
756 | ieee80211_process_delba(sdata, sta, | |
757 | mgmt, len); | |
758 | break; | |
759 | default: | |
760 | WARN_ON(1); | |
761 | break; | |
762 | } | |
763 | } | |
764 | rcu_read_unlock(); | |
344eec67 JB |
765 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
766 | struct ieee80211_hdr *hdr = (void *)mgmt; | |
767 | /* | |
768 | * So the frame isn't mgmt, but frame_control | |
769 | * is at the right place anyway, of course, so | |
770 | * the if statement is correct. | |
771 | * | |
772 | * Warn if we have other data frame types here, | |
773 | * they must not get here. | |
774 | */ | |
775 | WARN_ON(hdr->frame_control & | |
776 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); | |
777 | WARN_ON(!(hdr->seq_ctrl & | |
778 | cpu_to_le16(IEEE80211_SCTL_FRAG))); | |
779 | /* | |
780 | * This was a fragment of a frame, received while | |
781 | * a block-ack session was active. That cannot be | |
782 | * right, so terminate the session. | |
783 | */ | |
784 | rcu_read_lock(); | |
785 | sta = sta_info_get(sdata, mgmt->sa); | |
786 | if (sta) { | |
787 | u16 tid = *ieee80211_get_qos_ctl(hdr) & | |
788 | IEEE80211_QOS_CTL_TID_MASK; | |
789 | ||
790 | __ieee80211_stop_rx_ba_session( | |
791 | sta, tid, WLAN_BACK_RECIPIENT, | |
792 | WLAN_REASON_QSTA_REQUIRE_SETUP); | |
793 | } | |
794 | rcu_read_unlock(); | |
bed7ee6e | 795 | } else switch (sdata->vif.type) { |
1fa57d01 JB |
796 | case NL80211_IFTYPE_STATION: |
797 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
798 | break; | |
799 | case NL80211_IFTYPE_ADHOC: | |
800 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
801 | break; | |
802 | case NL80211_IFTYPE_MESH_POINT: | |
803 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
804 | break; | |
805 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
806 | break; | |
807 | default: | |
808 | WARN(1, "frame for unexpected interface type"); | |
1fa57d01 JB |
809 | break; |
810 | } | |
36b3a628 JB |
811 | |
812 | kfree_skb(skb); | |
1fa57d01 JB |
813 | } |
814 | ||
815 | /* then other type-dependent work */ | |
816 | switch (sdata->vif.type) { | |
817 | case NL80211_IFTYPE_STATION: | |
818 | ieee80211_sta_work(sdata); | |
819 | break; | |
820 | case NL80211_IFTYPE_ADHOC: | |
821 | ieee80211_ibss_work(sdata); | |
822 | break; | |
823 | case NL80211_IFTYPE_MESH_POINT: | |
824 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
825 | break; | |
826 | ieee80211_mesh_work(sdata); | |
827 | break; | |
828 | default: | |
829 | break; | |
830 | } | |
831 | } | |
832 | ||
833 | ||
75636525 JB |
834 | /* |
835 | * Helper function to initialise an interface to a specific type. | |
836 | */ | |
837 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 838 | enum nl80211_iftype type) |
f0706e82 | 839 | { |
75636525 JB |
840 | /* clear type-dependent union */ |
841 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
842 | ||
843 | /* and set some type-dependent values */ | |
844 | sdata->vif.type = type; | |
587e729e | 845 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
60719ffd | 846 | sdata->wdev.iftype = type; |
75636525 JB |
847 | |
848 | /* only monitor differs */ | |
849 | sdata->dev->type = ARPHRD_ETHER; | |
850 | ||
35f20c14 | 851 | skb_queue_head_init(&sdata->skb_queue); |
1fa57d01 | 852 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
35f20c14 | 853 | |
75636525 | 854 | switch (type) { |
05c914fe | 855 | case NL80211_IFTYPE_AP: |
75636525 JB |
856 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
857 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
858 | break; | |
05c914fe | 859 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 860 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 861 | break; |
46900298 JB |
862 | case NL80211_IFTYPE_ADHOC: |
863 | ieee80211_ibss_setup_sdata(sdata); | |
864 | break; | |
05c914fe | 865 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
866 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
867 | ieee80211_mesh_init_sdata(sdata); | |
868 | break; | |
05c914fe | 869 | case NL80211_IFTYPE_MONITOR: |
75636525 | 870 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 871 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
872 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
873 | MONITOR_FLAG_OTHER_BSS; | |
874 | break; | |
05c914fe JB |
875 | case NL80211_IFTYPE_WDS: |
876 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 877 | break; |
05c914fe JB |
878 | case NL80211_IFTYPE_UNSPECIFIED: |
879 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
880 | BUG(); |
881 | break; | |
882 | } | |
883 | ||
884 | ieee80211_debugfs_add_netdev(sdata); | |
885 | } | |
886 | ||
f3947e2d | 887 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 888 | enum nl80211_iftype type) |
75636525 | 889 | { |
f3947e2d JB |
890 | ASSERT_RTNL(); |
891 | ||
892 | if (type == sdata->vif.type) | |
893 | return 0; | |
894 | ||
e60c7744 | 895 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
896 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
897 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
898 | return -EOPNOTSUPP; |
899 | ||
f3947e2d JB |
900 | /* |
901 | * We could, here, on changes between IBSS/STA/MESH modes, | |
902 | * invoke an MLME function instead that disassociates etc. | |
903 | * and goes into the requested mode. | |
904 | */ | |
905 | ||
9607e6b6 | 906 | if (ieee80211_sdata_running(sdata)) |
f3947e2d JB |
907 | return -EBUSY; |
908 | ||
75636525 JB |
909 | /* Purge and reset type-dependent state. */ |
910 | ieee80211_teardown_sdata(sdata->dev); | |
911 | ieee80211_setup_sdata(sdata, type); | |
912 | ||
913 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 914 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
915 | ieee80211_mandatory_rates(sdata->local, |
916 | sdata->local->hw.conf.channel->band); | |
75636525 | 917 | sdata->drop_unencrypted = 0; |
9bc383de JB |
918 | if (type == NL80211_IFTYPE_STATION) |
919 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
920 | |
921 | return 0; | |
f0706e82 JB |
922 | } |
923 | ||
fa9029f8 JB |
924 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
925 | struct net_device *dev, | |
926 | enum nl80211_iftype type) | |
927 | { | |
928 | struct ieee80211_sub_if_data *sdata; | |
929 | u64 mask, start, addr, val, inc; | |
930 | u8 *m; | |
931 | u8 tmp_addr[ETH_ALEN]; | |
932 | int i; | |
933 | ||
934 | /* default ... something at least */ | |
935 | memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
936 | ||
937 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
938 | local->hw.wiphy->n_addresses <= 1) | |
939 | return; | |
940 | ||
941 | ||
942 | mutex_lock(&local->iflist_mtx); | |
943 | ||
944 | switch (type) { | |
945 | case NL80211_IFTYPE_MONITOR: | |
946 | /* doesn't matter */ | |
947 | break; | |
948 | case NL80211_IFTYPE_WDS: | |
949 | case NL80211_IFTYPE_AP_VLAN: | |
950 | /* match up with an AP interface */ | |
951 | list_for_each_entry(sdata, &local->interfaces, list) { | |
952 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
953 | continue; | |
954 | memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); | |
955 | break; | |
956 | } | |
957 | /* keep default if no AP interface present */ | |
958 | break; | |
959 | default: | |
960 | /* assign a new address if possible -- try n_addresses first */ | |
961 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
962 | bool used = false; | |
963 | ||
964 | list_for_each_entry(sdata, &local->interfaces, list) { | |
965 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
966 | sdata->vif.addr, ETH_ALEN) == 0) { | |
967 | used = true; | |
968 | break; | |
969 | } | |
970 | } | |
971 | ||
972 | if (!used) { | |
973 | memcpy(dev->perm_addr, | |
974 | local->hw.wiphy->addresses[i].addr, | |
975 | ETH_ALEN); | |
976 | break; | |
977 | } | |
978 | } | |
979 | ||
980 | /* try mask if available */ | |
981 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
982 | break; | |
983 | ||
984 | m = local->hw.wiphy->addr_mask; | |
985 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
986 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
987 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
988 | ||
989 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
990 | /* not a contiguous mask ... not handled now! */ | |
991 | printk(KERN_DEBUG "not contiguous\n"); | |
992 | break; | |
993 | } | |
994 | ||
995 | m = local->hw.wiphy->perm_addr; | |
996 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
997 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
998 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
999 | ||
1000 | inc = 1ULL<<__ffs64(mask); | |
1001 | val = (start & mask); | |
1002 | addr = (start & ~mask) | (val & mask); | |
1003 | do { | |
1004 | bool used = false; | |
1005 | ||
1006 | tmp_addr[5] = addr >> 0*8; | |
1007 | tmp_addr[4] = addr >> 1*8; | |
1008 | tmp_addr[3] = addr >> 2*8; | |
1009 | tmp_addr[2] = addr >> 3*8; | |
1010 | tmp_addr[1] = addr >> 4*8; | |
1011 | tmp_addr[0] = addr >> 5*8; | |
1012 | ||
1013 | val += inc; | |
1014 | ||
1015 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1016 | if (memcmp(tmp_addr, sdata->vif.addr, | |
1017 | ETH_ALEN) == 0) { | |
1018 | used = true; | |
1019 | break; | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | if (!used) { | |
1024 | memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); | |
1025 | break; | |
1026 | } | |
1027 | addr = (start & ~mask) | (val & mask); | |
1028 | } while (addr != start); | |
1029 | ||
1030 | break; | |
1031 | } | |
1032 | ||
1033 | mutex_unlock(&local->iflist_mtx); | |
1034 | } | |
1035 | ||
3e122be0 | 1036 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 1037 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 1038 | struct vif_params *params) |
f0706e82 JB |
1039 | { |
1040 | struct net_device *ndev; | |
f0706e82 | 1041 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 1042 | int ret, i; |
f0706e82 JB |
1043 | |
1044 | ASSERT_RTNL(); | |
75636525 | 1045 | |
cf0277e7 JB |
1046 | ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, |
1047 | name, ieee80211_if_setup, local->hw.queues); | |
f0706e82 JB |
1048 | if (!ndev) |
1049 | return -ENOMEM; | |
a272a720 | 1050 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
f0706e82 | 1051 | |
f3994ece JB |
1052 | ndev->needed_headroom = local->tx_headroom + |
1053 | 4*6 /* four MAC addresses */ | |
1054 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
1055 | + 6 /* mesh */ | |
1056 | + 8 /* rfc1042/bridge tunnel */ | |
1057 | - ETH_HLEN /* ethernet hard_header_len */ | |
1058 | + IEEE80211_ENCRYPT_HEADROOM; | |
1059 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
1060 | ||
f0706e82 JB |
1061 | ret = dev_alloc_name(ndev, ndev->name); |
1062 | if (ret < 0) | |
1063 | goto fail; | |
1064 | ||
fa9029f8 JB |
1065 | ieee80211_assign_perm_addr(local, ndev, type); |
1066 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
f0706e82 JB |
1067 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
1068 | ||
3e122be0 JB |
1069 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
1070 | sdata = netdev_priv(ndev); | |
f0706e82 | 1071 | ndev->ieee80211_ptr = &sdata->wdev; |
47846c9b JB |
1072 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
1073 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
75636525 JB |
1074 | |
1075 | /* initialise type-independent data */ | |
f0706e82 | 1076 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 1077 | sdata->local = local; |
75636525 JB |
1078 | sdata->dev = ndev; |
1079 | ||
1080 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
1081 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
1082 | ||
1083 | INIT_LIST_HEAD(&sdata->key_list); | |
1084 | ||
37eb0b16 JM |
1085 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
1086 | struct ieee80211_supported_band *sband; | |
1087 | sband = local->hw.wiphy->bands[i]; | |
1088 | sdata->rc_rateidx_mask[i] = | |
1089 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
1090 | } | |
75636525 JB |
1091 | |
1092 | /* setup type-dependent data */ | |
1093 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 1094 | |
9bc383de JB |
1095 | if (params) { |
1096 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1097 | if (type == NL80211_IFTYPE_STATION) | |
1098 | sdata->u.mgd.use_4addr = params->use_4addr; | |
1099 | } | |
1100 | ||
f0706e82 JB |
1101 | ret = register_netdevice(ndev); |
1102 | if (ret) | |
1103 | goto fail; | |
1104 | ||
902acc78 JB |
1105 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1106 | params && params->mesh_id_len) | |
472dbc45 JB |
1107 | ieee80211_sdata_set_mesh_id(sdata, |
1108 | params->mesh_id_len, | |
1109 | params->mesh_id); | |
ee385855 | 1110 | |
c771c9d8 | 1111 | mutex_lock(&local->iflist_mtx); |
79010420 | 1112 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1113 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1114 | |
f0706e82 JB |
1115 | if (new_dev) |
1116 | *new_dev = ndev; | |
f0706e82 | 1117 | |
f0706e82 JB |
1118 | return 0; |
1119 | ||
75636525 | 1120 | fail: |
f0706e82 JB |
1121 | free_netdev(ndev); |
1122 | return ret; | |
1123 | } | |
1124 | ||
f698d856 | 1125 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1126 | { |
f0706e82 | 1127 | ASSERT_RTNL(); |
11a843b7 | 1128 | |
c771c9d8 | 1129 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1130 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1131 | mutex_unlock(&sdata->local->iflist_mtx); |
1132 | ||
75636525 | 1133 | synchronize_rcu(); |
f698d856 | 1134 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
1135 | } |
1136 | ||
75636525 JB |
1137 | /* |
1138 | * Remove all interfaces, may only be called at hardware unregistration | |
1139 | * time because it doesn't do RCU-safe list removals. | |
1140 | */ | |
1141 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1142 | { |
75636525 | 1143 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1144 | LIST_HEAD(unreg_list); |
f0706e82 JB |
1145 | |
1146 | ASSERT_RTNL(); | |
1147 | ||
efe117ab | 1148 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1149 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1150 | list_del(&sdata->list); | |
c771c9d8 | 1151 | |
efe117ab | 1152 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
f0706e82 | 1153 | } |
efe117ab ED |
1154 | mutex_unlock(&local->iflist_mtx); |
1155 | unregister_netdevice_many(&unreg_list); | |
f0706e82 | 1156 | } |
5cff20e6 JB |
1157 | |
1158 | static u32 ieee80211_idle_off(struct ieee80211_local *local, | |
1159 | const char *reason) | |
1160 | { | |
1161 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
1162 | return 0; | |
1163 | ||
1164 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1165 | printk(KERN_DEBUG "%s: device no longer idle - %s\n", | |
1166 | wiphy_name(local->hw.wiphy), reason); | |
1167 | #endif | |
1168 | ||
1169 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
1170 | return IEEE80211_CONF_CHANGE_IDLE; | |
1171 | } | |
1172 | ||
1173 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
1174 | { | |
1175 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
1176 | return 0; | |
1177 | ||
1178 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1179 | printk(KERN_DEBUG "%s: device now idle\n", | |
1180 | wiphy_name(local->hw.wiphy)); | |
1181 | #endif | |
1182 | ||
a80f7c0b JB |
1183 | drv_flush(local, false); |
1184 | ||
5cff20e6 JB |
1185 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
1186 | return IEEE80211_CONF_CHANGE_IDLE; | |
1187 | } | |
1188 | ||
1189 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
1190 | { | |
1191 | struct ieee80211_sub_if_data *sdata; | |
1192 | int count = 0; | |
1193 | ||
af6b6374 JB |
1194 | if (!list_empty(&local->work_list)) |
1195 | return ieee80211_idle_off(local, "working"); | |
1196 | ||
fbe9c429 | 1197 | if (local->scanning) |
5cff20e6 JB |
1198 | return ieee80211_idle_off(local, "scanning"); |
1199 | ||
1200 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1201 | if (!ieee80211_sdata_running(sdata)) |
5cff20e6 JB |
1202 | continue; |
1203 | /* do not count disabled managed interfaces */ | |
1204 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
af6b6374 | 1205 | !sdata->u.mgd.associated) |
5cff20e6 JB |
1206 | continue; |
1207 | /* do not count unused IBSS interfaces */ | |
1208 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
1209 | !sdata->u.ibss.ssid_len) | |
1210 | continue; | |
1211 | /* count everything else */ | |
1212 | count++; | |
1213 | } | |
1214 | ||
1215 | if (!count) | |
1216 | return ieee80211_idle_on(local); | |
1217 | else | |
1218 | return ieee80211_idle_off(local, "in use"); | |
1219 | ||
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
1224 | { | |
1225 | u32 chg; | |
1226 | ||
1227 | mutex_lock(&local->iflist_mtx); | |
1228 | chg = __ieee80211_recalc_idle(local); | |
1229 | mutex_unlock(&local->iflist_mtx); | |
58905ca5 JB |
1230 | if (chg) |
1231 | ieee80211_hw_config(local, chg); | |
5cff20e6 | 1232 | } |
47846c9b JB |
1233 | |
1234 | static int netdev_notify(struct notifier_block *nb, | |
1235 | unsigned long state, | |
1236 | void *ndev) | |
1237 | { | |
1238 | struct net_device *dev = ndev; | |
1239 | struct ieee80211_sub_if_data *sdata; | |
1240 | ||
1241 | if (state != NETDEV_CHANGENAME) | |
1242 | return 0; | |
1243 | ||
1244 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1245 | return 0; | |
1246 | ||
1247 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1248 | return 0; | |
1249 | ||
1250 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1251 | ||
2f5265e6 | 1252 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1253 | |
1254 | ieee80211_debugfs_rename_netdev(sdata); | |
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | static struct notifier_block mac80211_netdev_notifier = { | |
1259 | .notifier_call = netdev_notify, | |
1260 | }; | |
1261 | ||
1262 | int ieee80211_iface_init(void) | |
1263 | { | |
1264 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1265 | } | |
1266 | ||
1267 | void ieee80211_iface_exit(void) | |
1268 | { | |
1269 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1270 | } |