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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; | |
4e6cbfd0 JL |
190 | if (local->ops->napi_poll) |
191 | napi_enable(&local->napi); | |
e8975581 JB |
192 | /* we're brought up, everything changes */ |
193 | hw_reconf_flags = ~0; | |
1f87f7d3 | 194 | ieee80211_led_radio(local, true); |
0d143fe1 JB |
195 | } |
196 | ||
197 | /* | |
198 | * Check all interfaces and copy the hopefully now-present | |
199 | * MAC address to those that have the special null one. | |
200 | */ | |
201 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
202 | struct net_device *ndev = nsdata->dev; | |
203 | ||
204 | /* | |
9607e6b6 | 205 | * No need to check running since we do not allow |
0d143fe1 JB |
206 | * it to start up with this invalid address. |
207 | */ | |
0adc23f5 | 208 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) { |
0d143fe1 JB |
209 | memcpy(ndev->dev_addr, |
210 | local->hw.wiphy->perm_addr, | |
211 | ETH_ALEN); | |
0adc23f5 JL |
212 | memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN); |
213 | } | |
0d143fe1 JB |
214 | } |
215 | ||
0d143fe1 JB |
216 | /* |
217 | * Validate the MAC address for this device. | |
218 | */ | |
219 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
24487981 JB |
220 | if (!local->open_count) |
221 | drv_stop(local); | |
0d143fe1 JB |
222 | return -EADDRNOTAVAIL; |
223 | } | |
224 | ||
225 | switch (sdata->vif.type) { | |
226 | case NL80211_IFTYPE_AP_VLAN: | |
227 | /* no need to tell driver */ | |
228 | break; | |
229 | case NL80211_IFTYPE_MONITOR: | |
230 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
231 | local->cooked_mntrs++; | |
232 | break; | |
233 | } | |
234 | ||
235 | /* must be before the call to ieee80211_configure_filter */ | |
236 | local->monitors++; | |
e8975581 | 237 | if (local->monitors == 1) { |
0869aea0 JB |
238 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
239 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 240 | } |
0d143fe1 JB |
241 | |
242 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
243 | local->fif_fcsfail++; | |
244 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
245 | local->fif_plcpfail++; | |
e3b90ca2 | 246 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
0d143fe1 | 247 | local->fif_control++; |
e3b90ca2 IP |
248 | local->fif_pspoll++; |
249 | } | |
0d143fe1 JB |
250 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
251 | local->fif_other_bss++; | |
252 | ||
0d143fe1 | 253 | ieee80211_configure_filter(local); |
53e9b1de DG |
254 | |
255 | netif_carrier_on(dev); | |
0d143fe1 | 256 | break; |
0d143fe1 | 257 | default: |
1ed32e4f | 258 | res = drv_add_interface(local, &sdata->vif); |
0d143fe1 JB |
259 | if (res) |
260 | goto err_stop; | |
261 | ||
a3c9aa51 AY |
262 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
263 | local->fif_other_bss++; | |
a3c9aa51 | 264 | ieee80211_configure_filter(local); |
a3c9aa51 | 265 | |
0d143fe1 | 266 | ieee80211_start_mesh(sdata); |
e3b90ca2 IP |
267 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
268 | local->fif_pspoll++; | |
269 | ||
e3b90ca2 | 270 | ieee80211_configure_filter(local); |
a3c9aa51 | 271 | } |
e3b90ca2 | 272 | |
0d143fe1 JB |
273 | changed |= ieee80211_reset_erp_info(sdata); |
274 | ieee80211_bss_info_change_notify(sdata, changed); | |
0d143fe1 | 275 | |
7986cf95 | 276 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
0d143fe1 JB |
277 | netif_carrier_off(dev); |
278 | else | |
279 | netif_carrier_on(dev); | |
280 | } | |
281 | ||
282 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { | |
283 | /* Create STA entry for the WDS peer */ | |
284 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
285 | GFP_KERNEL); | |
286 | if (!sta) { | |
287 | res = -ENOMEM; | |
288 | goto err_del_interface; | |
289 | } | |
290 | ||
291 | /* no locking required since STA is not live yet */ | |
292 | sta->flags |= WLAN_STA_AUTHORIZED; | |
293 | ||
294 | res = sta_info_insert(sta); | |
295 | if (res) { | |
296 | /* STA has been freed */ | |
297 | goto err_del_interface; | |
298 | } | |
299 | } | |
300 | ||
0d143fe1 JB |
301 | /* |
302 | * set_multicast_list will be invoked by the networking core | |
303 | * which will check whether any increments here were done in | |
304 | * error and sync them down to the hardware as filter flags. | |
305 | */ | |
306 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
307 | atomic_inc(&local->iff_allmultis); | |
308 | ||
309 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
310 | atomic_inc(&local->iff_promiscs); | |
311 | ||
5cff20e6 JB |
312 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
313 | ||
0d143fe1 | 314 | local->open_count++; |
e8975581 JB |
315 | if (hw_reconf_flags) { |
316 | ieee80211_hw_config(local, hw_reconf_flags); | |
0d143fe1 JB |
317 | /* |
318 | * set default queue parameters so drivers don't | |
319 | * need to initialise the hardware if the hardware | |
320 | * doesn't start up with sane defaults | |
321 | */ | |
322 | ieee80211_set_wmm_default(sdata); | |
323 | } | |
324 | ||
10f644a4 | 325 | ieee80211_recalc_ps(local, -1); |
965bedad | 326 | |
8a5b33f5 | 327 | netif_tx_start_all_queues(dev); |
0d143fe1 JB |
328 | |
329 | return 0; | |
330 | err_del_interface: | |
1ed32e4f | 331 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 | 332 | err_stop: |
24487981 JB |
333 | if (!local->open_count) |
334 | drv_stop(local); | |
0d143fe1 JB |
335 | err_del_bss: |
336 | sdata->bss = NULL; | |
337 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
338 | list_del(&sdata->u.vlan.list); | |
339 | return res; | |
340 | } | |
341 | ||
342 | static int ieee80211_stop(struct net_device *dev) | |
343 | { | |
344 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
345 | struct ieee80211_local *local = sdata->local; | |
5061b0c2 JB |
346 | unsigned long flags; |
347 | struct sk_buff *skb, *tmp; | |
e8975581 | 348 | u32 hw_reconf_flags = 0; |
5061b0c2 | 349 | int i; |
0d143fe1 JB |
350 | |
351 | /* | |
352 | * Stop TX on this interface first. | |
353 | */ | |
8a5b33f5 | 354 | netif_tx_stop_all_queues(dev); |
0d143fe1 | 355 | |
af6b6374 JB |
356 | /* |
357 | * Purge work for this interface. | |
358 | */ | |
359 | ieee80211_work_purge(sdata); | |
360 | ||
0d143fe1 JB |
361 | /* |
362 | * Remove all stations associated with this interface. | |
363 | * | |
364 | * This must be done before calling ops->remove_interface() | |
365 | * because otherwise we can later invoke ops->sta_notify() | |
366 | * whenever the STAs are removed, and that invalidates driver | |
367 | * assumptions about always getting a vif pointer that is valid | |
368 | * (because if we remove a STA after ops->remove_interface() | |
369 | * the driver will have removed the vif info already!) | |
370 | * | |
371 | * We could relax this and only unlink the stations from the | |
372 | * hash table and list but keep them on a per-sdata list that | |
373 | * will be inserted back again when the interface is brought | |
374 | * up again, but I don't currently see a use case for that, | |
375 | * except with WDS which gets a STA entry created when it is | |
376 | * brought up. | |
377 | */ | |
378 | sta_info_flush(local, sdata); | |
379 | ||
380 | /* | |
381 | * Don't count this interface for promisc/allmulti while it | |
382 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
383 | * on the master interface which will sync these down to the | |
384 | * hardware as filter flags. | |
385 | */ | |
386 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
387 | atomic_dec(&local->iff_allmultis); | |
388 | ||
389 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
390 | atomic_dec(&local->iff_promiscs); | |
391 | ||
e3b90ca2 IP |
392 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
393 | local->fif_pspoll--; | |
394 | ||
3b8d81e0 JB |
395 | netif_addr_lock_bh(dev); |
396 | spin_lock_bh(&local->filter_lock); | |
22bedad3 | 397 | __hw_addr_unsync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 JB |
398 | spin_unlock_bh(&local->filter_lock); |
399 | netif_addr_unlock_bh(dev); | |
400 | ||
3ac64bee JB |
401 | ieee80211_configure_filter(local); |
402 | ||
7cbf0ba5 VN |
403 | del_timer_sync(&local->dynamic_ps_timer); |
404 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 JB |
405 | |
406 | /* APs need special treatment */ | |
407 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 408 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
409 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
410 | ||
411 | /* remove beacon */ | |
412 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
413 | synchronize_rcu(); | |
414 | kfree(old_beacon); | |
415 | ||
416 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 417 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
418 | u.vlan.list) |
419 | dev_close(vlan->dev); | |
420 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
421 | } | |
422 | ||
423 | local->open_count--; | |
424 | ||
425 | switch (sdata->vif.type) { | |
426 | case NL80211_IFTYPE_AP_VLAN: | |
427 | list_del(&sdata->u.vlan.list); | |
428 | /* no need to tell driver */ | |
429 | break; | |
430 | case NL80211_IFTYPE_MONITOR: | |
431 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
432 | local->cooked_mntrs--; | |
433 | break; | |
434 | } | |
435 | ||
436 | local->monitors--; | |
e8975581 | 437 | if (local->monitors == 0) { |
0869aea0 JB |
438 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
439 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 440 | } |
0d143fe1 JB |
441 | |
442 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
443 | local->fif_fcsfail--; | |
444 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
445 | local->fif_plcpfail--; | |
e3b90ca2 IP |
446 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
447 | local->fif_pspoll--; | |
0d143fe1 | 448 | local->fif_control--; |
e3b90ca2 | 449 | } |
0d143fe1 JB |
450 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
451 | local->fif_other_bss--; | |
452 | ||
0d143fe1 | 453 | ieee80211_configure_filter(local); |
0d143fe1 JB |
454 | break; |
455 | case NL80211_IFTYPE_STATION: | |
46900298 JB |
456 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
457 | del_timer_sync(&sdata->u.mgd.timer); | |
0e2b6286 JB |
458 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
459 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
0d143fe1 | 460 | /* |
0e2b6286 JB |
461 | * If any of the timers fired while we waited for it, it will |
462 | * have queued its work. Now the work will be running again | |
0d143fe1 JB |
463 | * but will not rearm the timer again because it checks |
464 | * whether the interface is running, which, at this point, | |
465 | * it no longer is. | |
466 | */ | |
46900298 | 467 | cancel_work_sync(&sdata->u.mgd.chswitch_work); |
0e2b6286 | 468 | cancel_work_sync(&sdata->u.mgd.monitor_work); |
1e4dcd01 | 469 | cancel_work_sync(&sdata->u.mgd.beacon_connection_loss_work); |
04de8381 | 470 | |
46900298 JB |
471 | /* fall through */ |
472 | case NL80211_IFTYPE_ADHOC: | |
64592c8f | 473 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
46900298 | 474 | del_timer_sync(&sdata->u.ibss.timer); |
0d143fe1 JB |
475 | /* fall through */ |
476 | case NL80211_IFTYPE_MESH_POINT: | |
477 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
478 | /* other_bss and allmulti are always set on mesh |
479 | * ifaces */ | |
480 | local->fif_other_bss--; | |
0d143fe1 | 481 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 | 482 | |
a3c9aa51 | 483 | ieee80211_configure_filter(local); |
a3c9aa51 | 484 | |
0d143fe1 JB |
485 | ieee80211_stop_mesh(sdata); |
486 | } | |
487 | /* fall through */ | |
488 | default: | |
c1475ca9 | 489 | flush_work(&sdata->work); |
35f20c14 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(); | |
497 | skb_queue_purge(&sdata->skb_queue); | |
498 | ||
15db0b7f JB |
499 | if (local->scan_sdata == sdata) |
500 | ieee80211_scan_cancel(local); | |
0d143fe1 | 501 | |
97af7432 BC |
502 | /* |
503 | * Disable beaconing for AP and mesh, IBSS can't | |
504 | * still be joined to a network at this point. | |
505 | */ | |
506 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
507 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { | |
508 | ieee80211_bss_info_change_notify(sdata, | |
509 | BSS_CHANGED_BEACON_ENABLED); | |
510 | } | |
511 | ||
ad0e2b5a JB |
512 | /* free all remaining keys, there shouldn't be any */ |
513 | ieee80211_free_keys(sdata); | |
1ed32e4f | 514 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 JB |
515 | } |
516 | ||
517 | sdata->bss = NULL; | |
518 | ||
5cff20e6 JB |
519 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
520 | ||
521 | ieee80211_recalc_ps(local, -1); | |
522 | ||
0d143fe1 | 523 | if (local->open_count == 0) { |
4e6cbfd0 JL |
524 | if (local->ops->napi_poll) |
525 | napi_disable(&local->napi); | |
ea77f12f | 526 | ieee80211_clear_tx_pending(local); |
84f6a01c | 527 | ieee80211_stop_device(local); |
0d143fe1 | 528 | |
e8975581 JB |
529 | /* no reconfiguring after stop! */ |
530 | hw_reconf_flags = 0; | |
0d143fe1 JB |
531 | } |
532 | ||
e8975581 JB |
533 | /* do after stop to avoid reconfiguring when we stop anyway */ |
534 | if (hw_reconf_flags) | |
535 | ieee80211_hw_config(local, hw_reconf_flags); | |
536 | ||
5061b0c2 JB |
537 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
538 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
539 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
540 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
541 | if (info->control.vif == &sdata->vif) { | |
542 | __skb_unlink(skb, &local->pending[i]); | |
543 | dev_kfree_skb_irq(skb); | |
544 | } | |
545 | } | |
546 | } | |
547 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
548 | ||
0d143fe1 JB |
549 | return 0; |
550 | } | |
551 | ||
552 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
553 | { | |
0d143fe1 | 554 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 555 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
556 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
557 | ||
558 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
559 | promisc = !!(dev->flags & IFF_PROMISC); | |
560 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
561 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
562 | ||
563 | if (allmulti != sdata_allmulti) { | |
564 | if (dev->flags & IFF_ALLMULTI) | |
565 | atomic_inc(&local->iff_allmultis); | |
566 | else | |
567 | atomic_dec(&local->iff_allmultis); | |
568 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
569 | } | |
570 | ||
571 | if (promisc != sdata_promisc) { | |
572 | if (dev->flags & IFF_PROMISC) | |
573 | atomic_inc(&local->iff_promiscs); | |
574 | else | |
575 | atomic_dec(&local->iff_promiscs); | |
576 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
577 | } | |
3b8d81e0 | 578 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 579 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 580 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 581 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
582 | } |
583 | ||
75636525 JB |
584 | /* |
585 | * Called when the netdev is removed or, by the code below, before | |
586 | * the interface type changes. | |
587 | */ | |
588 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 589 | { |
75636525 JB |
590 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
591 | struct ieee80211_local *local = sdata->local; | |
592 | struct beacon_data *beacon; | |
593 | struct sk_buff *skb; | |
594 | int flushed; | |
f0706e82 JB |
595 | int i; |
596 | ||
75636525 JB |
597 | /* free extra data */ |
598 | ieee80211_free_keys(sdata); | |
599 | ||
aee14ceb JM |
600 | ieee80211_debugfs_remove_netdev(sdata); |
601 | ||
f0706e82 | 602 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
603 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
604 | sdata->fragment_next = 0; | |
11a843b7 | 605 | |
75636525 | 606 | switch (sdata->vif.type) { |
05c914fe | 607 | case NL80211_IFTYPE_AP: |
75636525 JB |
608 | beacon = sdata->u.ap.beacon; |
609 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
610 | synchronize_rcu(); | |
611 | kfree(beacon); | |
3e122be0 | 612 | |
75636525 JB |
613 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
614 | local->total_ps_buffered--; | |
615 | dev_kfree_skb(skb); | |
616 | } | |
617 | ||
618 | break; | |
05c914fe | 619 | case NL80211_IFTYPE_MESH_POINT: |
75636525 | 620 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 621 | mesh_rmc_free(sdata); |
472dbc45 | 622 | break; |
05c914fe | 623 | case NL80211_IFTYPE_ADHOC: |
af8cdcd8 JB |
624 | if (WARN_ON(sdata->u.ibss.presp)) |
625 | kfree_skb(sdata->u.ibss.presp); | |
46900298 JB |
626 | break; |
627 | case NL80211_IFTYPE_STATION: | |
05c914fe JB |
628 | case NL80211_IFTYPE_WDS: |
629 | case NL80211_IFTYPE_AP_VLAN: | |
630 | case NL80211_IFTYPE_MONITOR: | |
75636525 | 631 | break; |
05c914fe JB |
632 | case NL80211_IFTYPE_UNSPECIFIED: |
633 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
634 | BUG(); |
635 | break; | |
636 | } | |
637 | ||
638 | flushed = sta_info_flush(local, sdata); | |
639 | WARN_ON(flushed); | |
f0706e82 JB |
640 | } |
641 | ||
cf0277e7 JB |
642 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
643 | struct sk_buff *skb) | |
644 | { | |
645 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
646 | } | |
647 | ||
587e729e JB |
648 | static const struct net_device_ops ieee80211_dataif_ops = { |
649 | .ndo_open = ieee80211_open, | |
650 | .ndo_stop = ieee80211_stop, | |
651 | .ndo_uninit = ieee80211_teardown_sdata, | |
652 | .ndo_start_xmit = ieee80211_subif_start_xmit, | |
653 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
654 | .ndo_change_mtu = ieee80211_change_mtu, | |
47846c9b | 655 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 656 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
657 | }; |
658 | ||
cf0277e7 JB |
659 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
660 | struct sk_buff *skb) | |
661 | { | |
662 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
663 | struct ieee80211_local *local = sdata->local; | |
664 | struct ieee80211_hdr *hdr; | |
665 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
193e70ef | 666 | u8 *p; |
cf0277e7 JB |
667 | |
668 | if (local->hw.queues < 4) | |
669 | return 0; | |
670 | ||
671 | if (skb->len < 4 || | |
b49bb574 | 672 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
673 | return 0; /* doesn't matter, frame will be dropped */ |
674 | ||
b49bb574 | 675 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 676 | |
861a57cd | 677 | if (!ieee80211_is_data(hdr->frame_control)) { |
cf0277e7 JB |
678 | skb->priority = 7; |
679 | return ieee802_1d_to_ac[skb->priority]; | |
680 | } | |
861a57cd FF |
681 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
682 | skb->priority = 0; | |
683 | return ieee802_1d_to_ac[skb->priority]; | |
684 | } | |
cf0277e7 | 685 | |
193e70ef FF |
686 | p = ieee80211_get_qos_ctl(hdr); |
687 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
688 | ||
cf0277e7 JB |
689 | return ieee80211_downgrade_queue(local, skb); |
690 | } | |
691 | ||
587e729e JB |
692 | static const struct net_device_ops ieee80211_monitorif_ops = { |
693 | .ndo_open = ieee80211_open, | |
694 | .ndo_stop = ieee80211_stop, | |
695 | .ndo_uninit = ieee80211_teardown_sdata, | |
696 | .ndo_start_xmit = ieee80211_monitor_start_xmit, | |
697 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
698 | .ndo_change_mtu = ieee80211_change_mtu, | |
699 | .ndo_set_mac_address = eth_mac_addr, | |
cf0277e7 | 700 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
701 | }; |
702 | ||
703 | static void ieee80211_if_setup(struct net_device *dev) | |
704 | { | |
705 | ether_setup(dev); | |
706 | dev->netdev_ops = &ieee80211_dataif_ops; | |
587e729e JB |
707 | dev->destructor = free_netdev; |
708 | } | |
709 | ||
1fa57d01 JB |
710 | static void ieee80211_iface_work(struct work_struct *work) |
711 | { | |
712 | struct ieee80211_sub_if_data *sdata = | |
713 | container_of(work, struct ieee80211_sub_if_data, work); | |
714 | struct ieee80211_local *local = sdata->local; | |
715 | struct sk_buff *skb; | |
344eec67 | 716 | struct sta_info *sta; |
c1475ca9 | 717 | struct ieee80211_ra_tid *ra_tid; |
1fa57d01 JB |
718 | |
719 | if (!ieee80211_sdata_running(sdata)) | |
720 | return; | |
721 | ||
722 | if (local->scanning) | |
723 | return; | |
724 | ||
725 | /* | |
726 | * ieee80211_queue_work() should have picked up most cases, | |
727 | * here we'll pick the rest. | |
728 | */ | |
729 | if (WARN(local->suspended, | |
730 | "interface work scheduled while going to suspend\n")) | |
731 | return; | |
732 | ||
733 | /* first process frames */ | |
734 | while ((skb = skb_dequeue(&sdata->skb_queue))) { | |
bed7ee6e JB |
735 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
736 | ||
c1475ca9 JB |
737 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
738 | ra_tid = (void *)&skb->cb; | |
739 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
740 | ra_tid->tid); | |
741 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { | |
742 | ra_tid = (void *)&skb->cb; | |
743 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
744 | ra_tid->tid); | |
745 | } else if (ieee80211_is_action(mgmt->frame_control) && | |
746 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { | |
bed7ee6e | 747 | int len = skb->len; |
bed7ee6e | 748 | |
a93e3644 | 749 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 750 | sta = sta_info_get_bss(sdata, mgmt->sa); |
bed7ee6e JB |
751 | if (sta) { |
752 | switch (mgmt->u.action.u.addba_req.action_code) { | |
753 | case WLAN_ACTION_ADDBA_REQ: | |
754 | ieee80211_process_addba_request( | |
755 | local, sta, mgmt, len); | |
756 | break; | |
757 | case WLAN_ACTION_ADDBA_RESP: | |
758 | ieee80211_process_addba_resp(local, sta, | |
759 | mgmt, len); | |
760 | break; | |
761 | case WLAN_ACTION_DELBA: | |
762 | ieee80211_process_delba(sdata, sta, | |
763 | mgmt, len); | |
764 | break; | |
765 | default: | |
766 | WARN_ON(1); | |
767 | break; | |
768 | } | |
769 | } | |
a93e3644 | 770 | mutex_unlock(&local->sta_mtx); |
344eec67 JB |
771 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
772 | struct ieee80211_hdr *hdr = (void *)mgmt; | |
773 | /* | |
774 | * So the frame isn't mgmt, but frame_control | |
775 | * is at the right place anyway, of course, so | |
776 | * the if statement is correct. | |
777 | * | |
778 | * Warn if we have other data frame types here, | |
779 | * they must not get here. | |
780 | */ | |
781 | WARN_ON(hdr->frame_control & | |
782 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); | |
783 | WARN_ON(!(hdr->seq_ctrl & | |
784 | cpu_to_le16(IEEE80211_SCTL_FRAG))); | |
785 | /* | |
786 | * This was a fragment of a frame, received while | |
787 | * a block-ack session was active. That cannot be | |
788 | * right, so terminate the session. | |
789 | */ | |
a93e3644 | 790 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 791 | sta = sta_info_get_bss(sdata, mgmt->sa); |
344eec67 JB |
792 | if (sta) { |
793 | u16 tid = *ieee80211_get_qos_ctl(hdr) & | |
794 | IEEE80211_QOS_CTL_TID_MASK; | |
795 | ||
796 | __ieee80211_stop_rx_ba_session( | |
797 | sta, tid, WLAN_BACK_RECIPIENT, | |
798 | WLAN_REASON_QSTA_REQUIRE_SETUP); | |
799 | } | |
a93e3644 | 800 | mutex_unlock(&local->sta_mtx); |
bed7ee6e | 801 | } else switch (sdata->vif.type) { |
1fa57d01 JB |
802 | case NL80211_IFTYPE_STATION: |
803 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
804 | break; | |
805 | case NL80211_IFTYPE_ADHOC: | |
806 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
807 | break; | |
808 | case NL80211_IFTYPE_MESH_POINT: | |
809 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
810 | break; | |
811 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
812 | break; | |
813 | default: | |
814 | WARN(1, "frame for unexpected interface type"); | |
1fa57d01 JB |
815 | break; |
816 | } | |
36b3a628 JB |
817 | |
818 | kfree_skb(skb); | |
1fa57d01 JB |
819 | } |
820 | ||
821 | /* then other type-dependent work */ | |
822 | switch (sdata->vif.type) { | |
823 | case NL80211_IFTYPE_STATION: | |
824 | ieee80211_sta_work(sdata); | |
825 | break; | |
826 | case NL80211_IFTYPE_ADHOC: | |
827 | ieee80211_ibss_work(sdata); | |
828 | break; | |
829 | case NL80211_IFTYPE_MESH_POINT: | |
830 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
831 | break; | |
832 | ieee80211_mesh_work(sdata); | |
833 | break; | |
834 | default: | |
835 | break; | |
836 | } | |
837 | } | |
838 | ||
839 | ||
75636525 JB |
840 | /* |
841 | * Helper function to initialise an interface to a specific type. | |
842 | */ | |
843 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 844 | enum nl80211_iftype type) |
f0706e82 | 845 | { |
75636525 JB |
846 | /* clear type-dependent union */ |
847 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
848 | ||
849 | /* and set some type-dependent values */ | |
850 | sdata->vif.type = type; | |
587e729e | 851 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
60719ffd | 852 | sdata->wdev.iftype = type; |
75636525 JB |
853 | |
854 | /* only monitor differs */ | |
855 | sdata->dev->type = ARPHRD_ETHER; | |
856 | ||
35f20c14 | 857 | skb_queue_head_init(&sdata->skb_queue); |
1fa57d01 | 858 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
35f20c14 | 859 | |
75636525 | 860 | switch (type) { |
05c914fe | 861 | case NL80211_IFTYPE_AP: |
75636525 JB |
862 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
863 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
864 | break; | |
05c914fe | 865 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 866 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 867 | break; |
46900298 JB |
868 | case NL80211_IFTYPE_ADHOC: |
869 | ieee80211_ibss_setup_sdata(sdata); | |
870 | break; | |
05c914fe | 871 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
872 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
873 | ieee80211_mesh_init_sdata(sdata); | |
874 | break; | |
05c914fe | 875 | case NL80211_IFTYPE_MONITOR: |
75636525 | 876 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 877 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
878 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
879 | MONITOR_FLAG_OTHER_BSS; | |
880 | break; | |
05c914fe JB |
881 | case NL80211_IFTYPE_WDS: |
882 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 883 | break; |
05c914fe JB |
884 | case NL80211_IFTYPE_UNSPECIFIED: |
885 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
886 | BUG(); |
887 | break; | |
888 | } | |
889 | ||
890 | ieee80211_debugfs_add_netdev(sdata); | |
891 | } | |
892 | ||
f3947e2d | 893 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 894 | enum nl80211_iftype type) |
75636525 | 895 | { |
f3947e2d JB |
896 | ASSERT_RTNL(); |
897 | ||
898 | if (type == sdata->vif.type) | |
899 | return 0; | |
900 | ||
e60c7744 | 901 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
902 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
903 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
904 | return -EOPNOTSUPP; |
905 | ||
f3947e2d JB |
906 | /* |
907 | * We could, here, on changes between IBSS/STA/MESH modes, | |
908 | * invoke an MLME function instead that disassociates etc. | |
909 | * and goes into the requested mode. | |
910 | */ | |
911 | ||
9607e6b6 | 912 | if (ieee80211_sdata_running(sdata)) |
f3947e2d JB |
913 | return -EBUSY; |
914 | ||
75636525 JB |
915 | /* Purge and reset type-dependent state. */ |
916 | ieee80211_teardown_sdata(sdata->dev); | |
917 | ieee80211_setup_sdata(sdata, type); | |
918 | ||
919 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 920 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
921 | ieee80211_mandatory_rates(sdata->local, |
922 | sdata->local->hw.conf.channel->band); | |
75636525 | 923 | sdata->drop_unencrypted = 0; |
9bc383de JB |
924 | if (type == NL80211_IFTYPE_STATION) |
925 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
926 | |
927 | return 0; | |
f0706e82 JB |
928 | } |
929 | ||
fa9029f8 JB |
930 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
931 | struct net_device *dev, | |
932 | enum nl80211_iftype type) | |
933 | { | |
934 | struct ieee80211_sub_if_data *sdata; | |
935 | u64 mask, start, addr, val, inc; | |
936 | u8 *m; | |
937 | u8 tmp_addr[ETH_ALEN]; | |
938 | int i; | |
939 | ||
940 | /* default ... something at least */ | |
941 | memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
942 | ||
943 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
944 | local->hw.wiphy->n_addresses <= 1) | |
945 | return; | |
946 | ||
947 | ||
948 | mutex_lock(&local->iflist_mtx); | |
949 | ||
950 | switch (type) { | |
951 | case NL80211_IFTYPE_MONITOR: | |
952 | /* doesn't matter */ | |
953 | break; | |
954 | case NL80211_IFTYPE_WDS: | |
955 | case NL80211_IFTYPE_AP_VLAN: | |
956 | /* match up with an AP interface */ | |
957 | list_for_each_entry(sdata, &local->interfaces, list) { | |
958 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
959 | continue; | |
960 | memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); | |
961 | break; | |
962 | } | |
963 | /* keep default if no AP interface present */ | |
964 | break; | |
965 | default: | |
966 | /* assign a new address if possible -- try n_addresses first */ | |
967 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
968 | bool used = false; | |
969 | ||
970 | list_for_each_entry(sdata, &local->interfaces, list) { | |
971 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
972 | sdata->vif.addr, ETH_ALEN) == 0) { | |
973 | used = true; | |
974 | break; | |
975 | } | |
976 | } | |
977 | ||
978 | if (!used) { | |
979 | memcpy(dev->perm_addr, | |
980 | local->hw.wiphy->addresses[i].addr, | |
981 | ETH_ALEN); | |
982 | break; | |
983 | } | |
984 | } | |
985 | ||
986 | /* try mask if available */ | |
987 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
988 | break; | |
989 | ||
990 | m = local->hw.wiphy->addr_mask; | |
991 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
992 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
993 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
994 | ||
995 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
996 | /* not a contiguous mask ... not handled now! */ | |
997 | printk(KERN_DEBUG "not contiguous\n"); | |
998 | break; | |
999 | } | |
1000 | ||
1001 | m = local->hw.wiphy->perm_addr; | |
1002 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1003 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1004 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1005 | ||
1006 | inc = 1ULL<<__ffs64(mask); | |
1007 | val = (start & mask); | |
1008 | addr = (start & ~mask) | (val & mask); | |
1009 | do { | |
1010 | bool used = false; | |
1011 | ||
1012 | tmp_addr[5] = addr >> 0*8; | |
1013 | tmp_addr[4] = addr >> 1*8; | |
1014 | tmp_addr[3] = addr >> 2*8; | |
1015 | tmp_addr[2] = addr >> 3*8; | |
1016 | tmp_addr[1] = addr >> 4*8; | |
1017 | tmp_addr[0] = addr >> 5*8; | |
1018 | ||
1019 | val += inc; | |
1020 | ||
1021 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1022 | if (memcmp(tmp_addr, sdata->vif.addr, | |
1023 | ETH_ALEN) == 0) { | |
1024 | used = true; | |
1025 | break; | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | if (!used) { | |
1030 | memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); | |
1031 | break; | |
1032 | } | |
1033 | addr = (start & ~mask) | (val & mask); | |
1034 | } while (addr != start); | |
1035 | ||
1036 | break; | |
1037 | } | |
1038 | ||
1039 | mutex_unlock(&local->iflist_mtx); | |
1040 | } | |
1041 | ||
3e122be0 | 1042 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 1043 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 1044 | struct vif_params *params) |
f0706e82 JB |
1045 | { |
1046 | struct net_device *ndev; | |
f0706e82 | 1047 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 1048 | int ret, i; |
f0706e82 JB |
1049 | |
1050 | ASSERT_RTNL(); | |
75636525 | 1051 | |
cf0277e7 JB |
1052 | ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, |
1053 | name, ieee80211_if_setup, local->hw.queues); | |
f0706e82 JB |
1054 | if (!ndev) |
1055 | return -ENOMEM; | |
a272a720 | 1056 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
f0706e82 | 1057 | |
f3994ece JB |
1058 | ndev->needed_headroom = local->tx_headroom + |
1059 | 4*6 /* four MAC addresses */ | |
1060 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
1061 | + 6 /* mesh */ | |
1062 | + 8 /* rfc1042/bridge tunnel */ | |
1063 | - ETH_HLEN /* ethernet hard_header_len */ | |
1064 | + IEEE80211_ENCRYPT_HEADROOM; | |
1065 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
1066 | ||
f0706e82 JB |
1067 | ret = dev_alloc_name(ndev, ndev->name); |
1068 | if (ret < 0) | |
1069 | goto fail; | |
1070 | ||
fa9029f8 JB |
1071 | ieee80211_assign_perm_addr(local, ndev, type); |
1072 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
f0706e82 JB |
1073 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
1074 | ||
3e122be0 JB |
1075 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
1076 | sdata = netdev_priv(ndev); | |
f0706e82 | 1077 | ndev->ieee80211_ptr = &sdata->wdev; |
47846c9b JB |
1078 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
1079 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
75636525 JB |
1080 | |
1081 | /* initialise type-independent data */ | |
f0706e82 | 1082 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 1083 | sdata->local = local; |
75636525 | 1084 | sdata->dev = ndev; |
68542962 JO |
1085 | #ifdef CONFIG_INET |
1086 | sdata->arp_filter_state = true; | |
1087 | #endif | |
75636525 JB |
1088 | |
1089 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
1090 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
1091 | ||
1092 | INIT_LIST_HEAD(&sdata->key_list); | |
1093 | ||
37eb0b16 JM |
1094 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
1095 | struct ieee80211_supported_band *sband; | |
1096 | sband = local->hw.wiphy->bands[i]; | |
1097 | sdata->rc_rateidx_mask[i] = | |
1098 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
1099 | } | |
75636525 JB |
1100 | |
1101 | /* setup type-dependent data */ | |
1102 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 1103 | |
9bc383de JB |
1104 | if (params) { |
1105 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1106 | if (type == NL80211_IFTYPE_STATION) | |
1107 | sdata->u.mgd.use_4addr = params->use_4addr; | |
1108 | } | |
1109 | ||
f0706e82 JB |
1110 | ret = register_netdevice(ndev); |
1111 | if (ret) | |
1112 | goto fail; | |
1113 | ||
902acc78 JB |
1114 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1115 | params && params->mesh_id_len) | |
472dbc45 JB |
1116 | ieee80211_sdata_set_mesh_id(sdata, |
1117 | params->mesh_id_len, | |
1118 | params->mesh_id); | |
ee385855 | 1119 | |
c771c9d8 | 1120 | mutex_lock(&local->iflist_mtx); |
79010420 | 1121 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1122 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1123 | |
f0706e82 JB |
1124 | if (new_dev) |
1125 | *new_dev = ndev; | |
f0706e82 | 1126 | |
f0706e82 JB |
1127 | return 0; |
1128 | ||
75636525 | 1129 | fail: |
f0706e82 JB |
1130 | free_netdev(ndev); |
1131 | return ret; | |
1132 | } | |
1133 | ||
f698d856 | 1134 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1135 | { |
f0706e82 | 1136 | ASSERT_RTNL(); |
11a843b7 | 1137 | |
c771c9d8 | 1138 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1139 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1140 | mutex_unlock(&sdata->local->iflist_mtx); |
1141 | ||
75636525 | 1142 | synchronize_rcu(); |
f698d856 | 1143 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
1144 | } |
1145 | ||
75636525 JB |
1146 | /* |
1147 | * Remove all interfaces, may only be called at hardware unregistration | |
1148 | * time because it doesn't do RCU-safe list removals. | |
1149 | */ | |
1150 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1151 | { |
75636525 | 1152 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1153 | LIST_HEAD(unreg_list); |
f0706e82 JB |
1154 | |
1155 | ASSERT_RTNL(); | |
1156 | ||
efe117ab | 1157 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1158 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1159 | list_del(&sdata->list); | |
c771c9d8 | 1160 | |
efe117ab | 1161 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
f0706e82 | 1162 | } |
efe117ab ED |
1163 | mutex_unlock(&local->iflist_mtx); |
1164 | unregister_netdevice_many(&unreg_list); | |
f0706e82 | 1165 | } |
5cff20e6 JB |
1166 | |
1167 | static u32 ieee80211_idle_off(struct ieee80211_local *local, | |
1168 | const char *reason) | |
1169 | { | |
1170 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
1171 | return 0; | |
1172 | ||
1173 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1174 | printk(KERN_DEBUG "%s: device no longer idle - %s\n", | |
1175 | wiphy_name(local->hw.wiphy), reason); | |
1176 | #endif | |
1177 | ||
1178 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
1179 | return IEEE80211_CONF_CHANGE_IDLE; | |
1180 | } | |
1181 | ||
1182 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
1183 | { | |
1184 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
1185 | return 0; | |
1186 | ||
1187 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1188 | printk(KERN_DEBUG "%s: device now idle\n", | |
1189 | wiphy_name(local->hw.wiphy)); | |
1190 | #endif | |
1191 | ||
a80f7c0b JB |
1192 | drv_flush(local, false); |
1193 | ||
5cff20e6 JB |
1194 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
1195 | return IEEE80211_CONF_CHANGE_IDLE; | |
1196 | } | |
1197 | ||
1198 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
1199 | { | |
1200 | struct ieee80211_sub_if_data *sdata; | |
1201 | int count = 0; | |
1202 | ||
af6b6374 JB |
1203 | if (!list_empty(&local->work_list)) |
1204 | return ieee80211_idle_off(local, "working"); | |
1205 | ||
fbe9c429 | 1206 | if (local->scanning) |
5cff20e6 JB |
1207 | return ieee80211_idle_off(local, "scanning"); |
1208 | ||
1209 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1210 | if (!ieee80211_sdata_running(sdata)) |
5cff20e6 JB |
1211 | continue; |
1212 | /* do not count disabled managed interfaces */ | |
1213 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
af6b6374 | 1214 | !sdata->u.mgd.associated) |
5cff20e6 JB |
1215 | continue; |
1216 | /* do not count unused IBSS interfaces */ | |
1217 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
1218 | !sdata->u.ibss.ssid_len) | |
1219 | continue; | |
1220 | /* count everything else */ | |
1221 | count++; | |
1222 | } | |
1223 | ||
1224 | if (!count) | |
1225 | return ieee80211_idle_on(local); | |
1226 | else | |
1227 | return ieee80211_idle_off(local, "in use"); | |
1228 | ||
1229 | return 0; | |
1230 | } | |
1231 | ||
1232 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
1233 | { | |
1234 | u32 chg; | |
1235 | ||
1236 | mutex_lock(&local->iflist_mtx); | |
1237 | chg = __ieee80211_recalc_idle(local); | |
1238 | mutex_unlock(&local->iflist_mtx); | |
58905ca5 JB |
1239 | if (chg) |
1240 | ieee80211_hw_config(local, chg); | |
5cff20e6 | 1241 | } |
47846c9b JB |
1242 | |
1243 | static int netdev_notify(struct notifier_block *nb, | |
1244 | unsigned long state, | |
1245 | void *ndev) | |
1246 | { | |
1247 | struct net_device *dev = ndev; | |
1248 | struct ieee80211_sub_if_data *sdata; | |
1249 | ||
1250 | if (state != NETDEV_CHANGENAME) | |
1251 | return 0; | |
1252 | ||
1253 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1254 | return 0; | |
1255 | ||
1256 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1257 | return 0; | |
1258 | ||
1259 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1260 | ||
2f5265e6 | 1261 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1262 | |
1263 | ieee80211_debugfs_rename_netdev(sdata); | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | static struct notifier_block mac80211_netdev_notifier = { | |
1268 | .notifier_call = netdev_notify, | |
1269 | }; | |
1270 | ||
1271 | int ieee80211_iface_init(void) | |
1272 | { | |
1273 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1274 | } | |
1275 | ||
1276 | void ieee80211_iface_exit(void) | |
1277 | { | |
1278 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1279 | } |