Root/
1 | /* |
2 | * Interface handling (except master interface) |
3 | * |
4 | * Copyright 2002-2005, Instant802 Networks, Inc. |
5 | * Copyright 2005-2006, Devicescape Software, Inc. |
6 | * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> |
7 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License version 2 as |
11 | * published by the Free Software Foundation. |
12 | */ |
13 | #include <linux/slab.h> |
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> |
19 | #include <net/ieee80211_radiotap.h> |
20 | #include "ieee80211_i.h" |
21 | #include "sta_info.h" |
22 | #include "debugfs_netdev.h" |
23 | #include "mesh.h" |
24 | #include "led.h" |
25 | #include "driver-ops.h" |
26 | #include "wme.h" |
27 | |
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 | |
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 | |
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); |
69 | struct sockaddr *sa = addr; |
70 | int ret; |
71 | |
72 | if (ieee80211_sdata_running(sdata)) |
73 | return -EBUSY; |
74 | |
75 | ret = eth_mac_addr(dev, sa); |
76 | |
77 | if (ret == 0) |
78 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
79 | |
80 | return ret; |
81 | } |
82 | |
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 | { |
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; |
102 | struct sta_info *sta; |
103 | u32 changed = 0; |
104 | int res; |
105 | u32 hw_reconf_flags = 0; |
106 | u8 null_addr[ETH_ALEN] = {0}; |
107 | |
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 | |
117 | if (ndev != dev && ieee80211_sdata_running(nsdata)) { |
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) { |
187 | res = drv_start(local); |
188 | if (res) |
189 | goto err_del_bss; |
190 | /* we're brought up, everything changes */ |
191 | hw_reconf_flags = ~0; |
192 | ieee80211_led_radio(local, true); |
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 | /* |
203 | * No need to check running since we do not allow |
204 | * it to start up with this invalid address. |
205 | */ |
206 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) { |
207 | memcpy(ndev->dev_addr, |
208 | local->hw.wiphy->perm_addr, |
209 | ETH_ALEN); |
210 | memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN); |
211 | } |
212 | } |
213 | |
214 | /* |
215 | * Validate the MAC address for this device. |
216 | */ |
217 | if (!is_valid_ether_addr(dev->dev_addr)) { |
218 | if (!local->open_count) |
219 | drv_stop(local); |
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++; |
235 | if (local->monitors == 1) { |
236 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
237 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
238 | } |
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++; |
244 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
245 | local->fif_control++; |
246 | local->fif_pspoll++; |
247 | } |
248 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
249 | local->fif_other_bss++; |
250 | |
251 | ieee80211_configure_filter(local); |
252 | break; |
253 | default: |
254 | res = drv_add_interface(local, &sdata->vif); |
255 | if (res) |
256 | goto err_stop; |
257 | |
258 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
259 | local->fif_other_bss++; |
260 | ieee80211_configure_filter(local); |
261 | |
262 | ieee80211_start_mesh(sdata); |
263 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
264 | local->fif_pspoll++; |
265 | |
266 | ieee80211_configure_filter(local); |
267 | } |
268 | |
269 | changed |= ieee80211_reset_erp_info(sdata); |
270 | ieee80211_bss_info_change_notify(sdata, changed); |
271 | ieee80211_enable_keys(sdata); |
272 | |
273 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
274 | netif_carrier_off(dev); |
275 | else |
276 | netif_carrier_on(dev); |
277 | } |
278 | |
279 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
280 | /* Create STA entry for the WDS peer */ |
281 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, |
282 | GFP_KERNEL); |
283 | if (!sta) { |
284 | res = -ENOMEM; |
285 | goto err_del_interface; |
286 | } |
287 | |
288 | /* no locking required since STA is not live yet */ |
289 | sta->flags |= WLAN_STA_AUTHORIZED; |
290 | |
291 | res = sta_info_insert(sta); |
292 | if (res) { |
293 | /* STA has been freed */ |
294 | goto err_del_interface; |
295 | } |
296 | } |
297 | |
298 | /* |
299 | * set_multicast_list will be invoked by the networking core |
300 | * which will check whether any increments here were done in |
301 | * error and sync them down to the hardware as filter flags. |
302 | */ |
303 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
304 | atomic_inc(&local->iff_allmultis); |
305 | |
306 | if (sdata->flags & IEEE80211_SDATA_PROMISC) |
307 | atomic_inc(&local->iff_promiscs); |
308 | |
309 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
310 | |
311 | local->open_count++; |
312 | if (hw_reconf_flags) { |
313 | ieee80211_hw_config(local, hw_reconf_flags); |
314 | /* |
315 | * set default queue parameters so drivers don't |
316 | * need to initialise the hardware if the hardware |
317 | * doesn't start up with sane defaults |
318 | */ |
319 | ieee80211_set_wmm_default(sdata); |
320 | } |
321 | |
322 | ieee80211_recalc_ps(local, -1); |
323 | |
324 | /* |
325 | * ieee80211_sta_work is disabled while network interface |
326 | * is down. Therefore, some configuration changes may not |
327 | * yet be effective. Trigger execution of ieee80211_sta_work |
328 | * to fix this. |
329 | */ |
330 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
331 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
332 | |
333 | netif_tx_start_all_queues(dev); |
334 | |
335 | return 0; |
336 | err_del_interface: |
337 | drv_remove_interface(local, &sdata->vif); |
338 | err_stop: |
339 | if (!local->open_count) |
340 | drv_stop(local); |
341 | err_del_bss: |
342 | sdata->bss = NULL; |
343 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
344 | list_del(&sdata->u.vlan.list); |
345 | return res; |
346 | } |
347 | |
348 | static int ieee80211_stop(struct net_device *dev) |
349 | { |
350 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
351 | struct ieee80211_local *local = sdata->local; |
352 | struct sta_info *sta; |
353 | unsigned long flags; |
354 | struct sk_buff *skb, *tmp; |
355 | u32 hw_reconf_flags = 0; |
356 | int i; |
357 | |
358 | /* |
359 | * Stop TX on this interface first. |
360 | */ |
361 | netif_tx_stop_all_queues(dev); |
362 | |
363 | /* |
364 | * Purge work for this interface. |
365 | */ |
366 | ieee80211_work_purge(sdata); |
367 | |
368 | /* |
369 | * Now delete all active aggregation sessions. |
370 | */ |
371 | rcu_read_lock(); |
372 | |
373 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
374 | if (sta->sdata == sdata) |
375 | ieee80211_sta_tear_down_BA_sessions(sta); |
376 | } |
377 | |
378 | rcu_read_unlock(); |
379 | |
380 | /* |
381 | * Remove all stations associated with this interface. |
382 | * |
383 | * This must be done before calling ops->remove_interface() |
384 | * because otherwise we can later invoke ops->sta_notify() |
385 | * whenever the STAs are removed, and that invalidates driver |
386 | * assumptions about always getting a vif pointer that is valid |
387 | * (because if we remove a STA after ops->remove_interface() |
388 | * the driver will have removed the vif info already!) |
389 | * |
390 | * We could relax this and only unlink the stations from the |
391 | * hash table and list but keep them on a per-sdata list that |
392 | * will be inserted back again when the interface is brought |
393 | * up again, but I don't currently see a use case for that, |
394 | * except with WDS which gets a STA entry created when it is |
395 | * brought up. |
396 | */ |
397 | sta_info_flush(local, sdata); |
398 | |
399 | /* |
400 | * Don't count this interface for promisc/allmulti while it |
401 | * is down. dev_mc_unsync() will invoke set_multicast_list |
402 | * on the master interface which will sync these down to the |
403 | * hardware as filter flags. |
404 | */ |
405 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
406 | atomic_dec(&local->iff_allmultis); |
407 | |
408 | if (sdata->flags & IEEE80211_SDATA_PROMISC) |
409 | atomic_dec(&local->iff_promiscs); |
410 | |
411 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
412 | local->fif_pspoll--; |
413 | |
414 | netif_addr_lock_bh(dev); |
415 | spin_lock_bh(&local->filter_lock); |
416 | __dev_addr_unsync(&local->mc_list, &local->mc_count, |
417 | &dev->mc_list, &dev->mc_count); |
418 | spin_unlock_bh(&local->filter_lock); |
419 | netif_addr_unlock_bh(dev); |
420 | |
421 | ieee80211_configure_filter(local); |
422 | |
423 | del_timer_sync(&local->dynamic_ps_timer); |
424 | cancel_work_sync(&local->dynamic_ps_enable_work); |
425 | |
426 | /* APs need special treatment */ |
427 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
428 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
429 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
430 | |
431 | /* remove beacon */ |
432 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
433 | synchronize_rcu(); |
434 | kfree(old_beacon); |
435 | |
436 | /* down all dependent devices, that is VLANs */ |
437 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
438 | u.vlan.list) |
439 | dev_close(vlan->dev); |
440 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); |
441 | } |
442 | |
443 | local->open_count--; |
444 | |
445 | switch (sdata->vif.type) { |
446 | case NL80211_IFTYPE_AP_VLAN: |
447 | list_del(&sdata->u.vlan.list); |
448 | /* no need to tell driver */ |
449 | break; |
450 | case NL80211_IFTYPE_MONITOR: |
451 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
452 | local->cooked_mntrs--; |
453 | break; |
454 | } |
455 | |
456 | local->monitors--; |
457 | if (local->monitors == 0) { |
458 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
459 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
460 | } |
461 | |
462 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) |
463 | local->fif_fcsfail--; |
464 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) |
465 | local->fif_plcpfail--; |
466 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
467 | local->fif_pspoll--; |
468 | local->fif_control--; |
469 | } |
470 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
471 | local->fif_other_bss--; |
472 | |
473 | ieee80211_configure_filter(local); |
474 | break; |
475 | case NL80211_IFTYPE_STATION: |
476 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
477 | del_timer_sync(&sdata->u.mgd.timer); |
478 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
479 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); |
480 | /* |
481 | * If any of the timers fired while we waited for it, it will |
482 | * have queued its work. Now the work will be running again |
483 | * but will not rearm the timer again because it checks |
484 | * whether the interface is running, which, at this point, |
485 | * it no longer is. |
486 | */ |
487 | cancel_work_sync(&sdata->u.mgd.work); |
488 | cancel_work_sync(&sdata->u.mgd.chswitch_work); |
489 | cancel_work_sync(&sdata->u.mgd.monitor_work); |
490 | cancel_work_sync(&sdata->u.mgd.beacon_loss_work); |
491 | |
492 | /* |
493 | * When we get here, the interface is marked down. |
494 | * Call synchronize_rcu() to wait for the RX path |
495 | * should it be using the interface and enqueuing |
496 | * frames at this very time on another CPU. |
497 | */ |
498 | synchronize_rcu(); |
499 | skb_queue_purge(&sdata->u.mgd.skb_queue); |
500 | /* fall through */ |
501 | case NL80211_IFTYPE_ADHOC: |
502 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
503 | del_timer_sync(&sdata->u.ibss.timer); |
504 | cancel_work_sync(&sdata->u.ibss.work); |
505 | synchronize_rcu(); |
506 | skb_queue_purge(&sdata->u.ibss.skb_queue); |
507 | } |
508 | /* fall through */ |
509 | case NL80211_IFTYPE_MESH_POINT: |
510 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
511 | /* other_bss and allmulti are always set on mesh |
512 | * ifaces */ |
513 | local->fif_other_bss--; |
514 | atomic_dec(&local->iff_allmultis); |
515 | |
516 | ieee80211_configure_filter(local); |
517 | |
518 | ieee80211_stop_mesh(sdata); |
519 | } |
520 | /* fall through */ |
521 | default: |
522 | if (local->scan_sdata == sdata) |
523 | ieee80211_scan_cancel(local); |
524 | |
525 | /* |
526 | * Disable beaconing for AP and mesh, IBSS can't |
527 | * still be joined to a network at this point. |
528 | */ |
529 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
530 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { |
531 | ieee80211_bss_info_change_notify(sdata, |
532 | BSS_CHANGED_BEACON_ENABLED); |
533 | } |
534 | |
535 | /* disable all keys for as long as this netdev is down */ |
536 | ieee80211_disable_keys(sdata); |
537 | drv_remove_interface(local, &sdata->vif); |
538 | } |
539 | |
540 | sdata->bss = NULL; |
541 | |
542 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
543 | |
544 | ieee80211_recalc_ps(local, -1); |
545 | |
546 | if (local->open_count == 0) { |
547 | ieee80211_clear_tx_pending(local); |
548 | ieee80211_stop_device(local); |
549 | |
550 | /* no reconfiguring after stop! */ |
551 | hw_reconf_flags = 0; |
552 | } |
553 | |
554 | /* do after stop to avoid reconfiguring when we stop anyway */ |
555 | if (hw_reconf_flags) |
556 | ieee80211_hw_config(local, hw_reconf_flags); |
557 | |
558 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
559 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { |
560 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { |
561 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
562 | if (info->control.vif == &sdata->vif) { |
563 | __skb_unlink(skb, &local->pending[i]); |
564 | dev_kfree_skb_irq(skb); |
565 | } |
566 | } |
567 | } |
568 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
569 | |
570 | return 0; |
571 | } |
572 | |
573 | static void ieee80211_set_multicast_list(struct net_device *dev) |
574 | { |
575 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
576 | struct ieee80211_local *local = sdata->local; |
577 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
578 | |
579 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
580 | promisc = !!(dev->flags & IFF_PROMISC); |
581 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
582 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); |
583 | |
584 | if (allmulti != sdata_allmulti) { |
585 | if (dev->flags & IFF_ALLMULTI) |
586 | atomic_inc(&local->iff_allmultis); |
587 | else |
588 | atomic_dec(&local->iff_allmultis); |
589 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
590 | } |
591 | |
592 | if (promisc != sdata_promisc) { |
593 | if (dev->flags & IFF_PROMISC) |
594 | atomic_inc(&local->iff_promiscs); |
595 | else |
596 | atomic_dec(&local->iff_promiscs); |
597 | sdata->flags ^= IEEE80211_SDATA_PROMISC; |
598 | } |
599 | spin_lock_bh(&local->filter_lock); |
600 | __dev_addr_sync(&local->mc_list, &local->mc_count, |
601 | &dev->mc_list, &dev->mc_count); |
602 | spin_unlock_bh(&local->filter_lock); |
603 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
604 | } |
605 | |
606 | /* |
607 | * Called when the netdev is removed or, by the code below, before |
608 | * the interface type changes. |
609 | */ |
610 | static void ieee80211_teardown_sdata(struct net_device *dev) |
611 | { |
612 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
613 | struct ieee80211_local *local = sdata->local; |
614 | struct beacon_data *beacon; |
615 | struct sk_buff *skb; |
616 | int flushed; |
617 | int i; |
618 | |
619 | /* free extra data */ |
620 | ieee80211_free_keys(sdata); |
621 | |
622 | ieee80211_debugfs_remove_netdev(sdata); |
623 | |
624 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
625 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
626 | sdata->fragment_next = 0; |
627 | |
628 | switch (sdata->vif.type) { |
629 | case NL80211_IFTYPE_AP: |
630 | beacon = sdata->u.ap.beacon; |
631 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
632 | synchronize_rcu(); |
633 | kfree(beacon); |
634 | |
635 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
636 | local->total_ps_buffered--; |
637 | dev_kfree_skb(skb); |
638 | } |
639 | |
640 | break; |
641 | case NL80211_IFTYPE_MESH_POINT: |
642 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
643 | mesh_rmc_free(sdata); |
644 | break; |
645 | case NL80211_IFTYPE_ADHOC: |
646 | if (WARN_ON(sdata->u.ibss.presp)) |
647 | kfree_skb(sdata->u.ibss.presp); |
648 | break; |
649 | case NL80211_IFTYPE_STATION: |
650 | case NL80211_IFTYPE_WDS: |
651 | case NL80211_IFTYPE_AP_VLAN: |
652 | case NL80211_IFTYPE_MONITOR: |
653 | break; |
654 | case NL80211_IFTYPE_UNSPECIFIED: |
655 | case __NL80211_IFTYPE_AFTER_LAST: |
656 | BUG(); |
657 | break; |
658 | } |
659 | |
660 | flushed = sta_info_flush(local, sdata); |
661 | WARN_ON(flushed); |
662 | } |
663 | |
664 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
665 | struct sk_buff *skb) |
666 | { |
667 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); |
668 | } |
669 | |
670 | static const struct net_device_ops ieee80211_dataif_ops = { |
671 | .ndo_open = ieee80211_open, |
672 | .ndo_stop = ieee80211_stop, |
673 | .ndo_uninit = ieee80211_teardown_sdata, |
674 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
675 | .ndo_set_multicast_list = ieee80211_set_multicast_list, |
676 | .ndo_change_mtu = ieee80211_change_mtu, |
677 | .ndo_set_mac_address = ieee80211_change_mac, |
678 | .ndo_select_queue = ieee80211_netdev_select_queue, |
679 | }; |
680 | |
681 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
682 | struct sk_buff *skb) |
683 | { |
684 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
685 | struct ieee80211_local *local = sdata->local; |
686 | struct ieee80211_hdr *hdr; |
687 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; |
688 | u8 *p; |
689 | |
690 | if (local->hw.queues < 4) |
691 | return 0; |
692 | |
693 | if (skb->len < 4 || |
694 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
695 | return 0; /* doesn't matter, frame will be dropped */ |
696 | |
697 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
698 | |
699 | if (!ieee80211_is_data(hdr->frame_control)) { |
700 | skb->priority = 7; |
701 | return ieee802_1d_to_ac[skb->priority]; |
702 | } |
703 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
704 | skb->priority = 0; |
705 | return ieee802_1d_to_ac[skb->priority]; |
706 | } |
707 | |
708 | p = ieee80211_get_qos_ctl(hdr); |
709 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; |
710 | |
711 | return ieee80211_downgrade_queue(local, skb); |
712 | } |
713 | |
714 | static const struct net_device_ops ieee80211_monitorif_ops = { |
715 | .ndo_open = ieee80211_open, |
716 | .ndo_stop = ieee80211_stop, |
717 | .ndo_uninit = ieee80211_teardown_sdata, |
718 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
719 | .ndo_set_multicast_list = ieee80211_set_multicast_list, |
720 | .ndo_change_mtu = ieee80211_change_mtu, |
721 | .ndo_set_mac_address = eth_mac_addr, |
722 | .ndo_select_queue = ieee80211_monitor_select_queue, |
723 | }; |
724 | |
725 | static void ieee80211_if_setup(struct net_device *dev) |
726 | { |
727 | ether_setup(dev); |
728 | dev->netdev_ops = &ieee80211_dataif_ops; |
729 | dev->destructor = free_netdev; |
730 | } |
731 | |
732 | /* |
733 | * Helper function to initialise an interface to a specific type. |
734 | */ |
735 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, |
736 | enum nl80211_iftype type) |
737 | { |
738 | /* clear type-dependent union */ |
739 | memset(&sdata->u, 0, sizeof(sdata->u)); |
740 | |
741 | /* and set some type-dependent values */ |
742 | sdata->vif.type = type; |
743 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
744 | sdata->wdev.iftype = type; |
745 | |
746 | /* only monitor differs */ |
747 | sdata->dev->type = ARPHRD_ETHER; |
748 | |
749 | switch (type) { |
750 | case NL80211_IFTYPE_AP: |
751 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
752 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
753 | break; |
754 | case NL80211_IFTYPE_STATION: |
755 | ieee80211_sta_setup_sdata(sdata); |
756 | break; |
757 | case NL80211_IFTYPE_ADHOC: |
758 | ieee80211_ibss_setup_sdata(sdata); |
759 | break; |
760 | case NL80211_IFTYPE_MESH_POINT: |
761 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
762 | ieee80211_mesh_init_sdata(sdata); |
763 | break; |
764 | case NL80211_IFTYPE_MONITOR: |
765 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
766 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
767 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
768 | MONITOR_FLAG_OTHER_BSS; |
769 | break; |
770 | case NL80211_IFTYPE_WDS: |
771 | case NL80211_IFTYPE_AP_VLAN: |
772 | break; |
773 | case NL80211_IFTYPE_UNSPECIFIED: |
774 | case __NL80211_IFTYPE_AFTER_LAST: |
775 | BUG(); |
776 | break; |
777 | } |
778 | |
779 | ieee80211_debugfs_add_netdev(sdata); |
780 | } |
781 | |
782 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
783 | enum nl80211_iftype type) |
784 | { |
785 | ASSERT_RTNL(); |
786 | |
787 | if (type == sdata->vif.type) |
788 | return 0; |
789 | |
790 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
791 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
792 | type == NL80211_IFTYPE_ADHOC) |
793 | return -EOPNOTSUPP; |
794 | |
795 | /* |
796 | * We could, here, on changes between IBSS/STA/MESH modes, |
797 | * invoke an MLME function instead that disassociates etc. |
798 | * and goes into the requested mode. |
799 | */ |
800 | |
801 | if (ieee80211_sdata_running(sdata)) |
802 | return -EBUSY; |
803 | |
804 | /* Purge and reset type-dependent state. */ |
805 | ieee80211_teardown_sdata(sdata->dev); |
806 | ieee80211_setup_sdata(sdata, type); |
807 | |
808 | /* reset some values that shouldn't be kept across type changes */ |
809 | sdata->vif.bss_conf.basic_rates = |
810 | ieee80211_mandatory_rates(sdata->local, |
811 | sdata->local->hw.conf.channel->band); |
812 | sdata->drop_unencrypted = 0; |
813 | if (type == NL80211_IFTYPE_STATION) |
814 | sdata->u.mgd.use_4addr = false; |
815 | |
816 | return 0; |
817 | } |
818 | |
819 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
820 | struct net_device **new_dev, enum nl80211_iftype type, |
821 | struct vif_params *params) |
822 | { |
823 | struct net_device *ndev; |
824 | struct ieee80211_sub_if_data *sdata = NULL; |
825 | int ret, i; |
826 | |
827 | ASSERT_RTNL(); |
828 | |
829 | ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, |
830 | name, ieee80211_if_setup, local->hw.queues); |
831 | if (!ndev) |
832 | return -ENOMEM; |
833 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
834 | |
835 | ndev->needed_headroom = local->tx_headroom + |
836 | 4*6 /* four MAC addresses */ |
837 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ |
838 | + 6 /* mesh */ |
839 | + 8 /* rfc1042/bridge tunnel */ |
840 | - ETH_HLEN /* ethernet hard_header_len */ |
841 | + IEEE80211_ENCRYPT_HEADROOM; |
842 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; |
843 | |
844 | ret = dev_alloc_name(ndev, ndev->name); |
845 | if (ret < 0) |
846 | goto fail; |
847 | |
848 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
849 | memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN); |
850 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
851 | |
852 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
853 | sdata = netdev_priv(ndev); |
854 | ndev->ieee80211_ptr = &sdata->wdev; |
855 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
856 | memcpy(sdata->name, ndev->name, IFNAMSIZ); |
857 | |
858 | /* initialise type-independent data */ |
859 | sdata->wdev.wiphy = local->hw.wiphy; |
860 | sdata->local = local; |
861 | sdata->dev = ndev; |
862 | |
863 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
864 | skb_queue_head_init(&sdata->fragments[i].skb_list); |
865 | |
866 | INIT_LIST_HEAD(&sdata->key_list); |
867 | |
868 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
869 | struct ieee80211_supported_band *sband; |
870 | sband = local->hw.wiphy->bands[i]; |
871 | sdata->rc_rateidx_mask[i] = |
872 | sband ? (1 << sband->n_bitrates) - 1 : 0; |
873 | } |
874 | |
875 | /* setup type-dependent data */ |
876 | ieee80211_setup_sdata(sdata, type); |
877 | |
878 | if (params) { |
879 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; |
880 | if (type == NL80211_IFTYPE_STATION) |
881 | sdata->u.mgd.use_4addr = params->use_4addr; |
882 | } |
883 | |
884 | ret = register_netdevice(ndev); |
885 | if (ret) |
886 | goto fail; |
887 | |
888 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
889 | params && params->mesh_id_len) |
890 | ieee80211_sdata_set_mesh_id(sdata, |
891 | params->mesh_id_len, |
892 | params->mesh_id); |
893 | |
894 | mutex_lock(&local->iflist_mtx); |
895 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
896 | mutex_unlock(&local->iflist_mtx); |
897 | |
898 | if (new_dev) |
899 | *new_dev = ndev; |
900 | |
901 | return 0; |
902 | |
903 | fail: |
904 | free_netdev(ndev); |
905 | return ret; |
906 | } |
907 | |
908 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
909 | { |
910 | ASSERT_RTNL(); |
911 | |
912 | mutex_lock(&sdata->local->iflist_mtx); |
913 | list_del_rcu(&sdata->list); |
914 | mutex_unlock(&sdata->local->iflist_mtx); |
915 | |
916 | synchronize_rcu(); |
917 | unregister_netdevice(sdata->dev); |
918 | } |
919 | |
920 | /* |
921 | * Remove all interfaces, may only be called at hardware unregistration |
922 | * time because it doesn't do RCU-safe list removals. |
923 | */ |
924 | void ieee80211_remove_interfaces(struct ieee80211_local *local) |
925 | { |
926 | struct ieee80211_sub_if_data *sdata, *tmp; |
927 | LIST_HEAD(unreg_list); |
928 | |
929 | ASSERT_RTNL(); |
930 | |
931 | mutex_lock(&local->iflist_mtx); |
932 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
933 | list_del(&sdata->list); |
934 | |
935 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
936 | } |
937 | mutex_unlock(&local->iflist_mtx); |
938 | unregister_netdevice_many(&unreg_list); |
939 | } |
940 | |
941 | static u32 ieee80211_idle_off(struct ieee80211_local *local, |
942 | const char *reason) |
943 | { |
944 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) |
945 | return 0; |
946 | |
947 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
948 | printk(KERN_DEBUG "%s: device no longer idle - %s\n", |
949 | wiphy_name(local->hw.wiphy), reason); |
950 | #endif |
951 | |
952 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; |
953 | return IEEE80211_CONF_CHANGE_IDLE; |
954 | } |
955 | |
956 | static u32 ieee80211_idle_on(struct ieee80211_local *local) |
957 | { |
958 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) |
959 | return 0; |
960 | |
961 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
962 | printk(KERN_DEBUG "%s: device now idle\n", |
963 | wiphy_name(local->hw.wiphy)); |
964 | #endif |
965 | |
966 | drv_flush(local, false); |
967 | |
968 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
969 | return IEEE80211_CONF_CHANGE_IDLE; |
970 | } |
971 | |
972 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) |
973 | { |
974 | struct ieee80211_sub_if_data *sdata; |
975 | int count = 0; |
976 | |
977 | if (!list_empty(&local->work_list)) |
978 | return ieee80211_idle_off(local, "working"); |
979 | |
980 | if (local->scanning) |
981 | return ieee80211_idle_off(local, "scanning"); |
982 | |
983 | list_for_each_entry(sdata, &local->interfaces, list) { |
984 | if (!ieee80211_sdata_running(sdata)) |
985 | continue; |
986 | /* do not count disabled managed interfaces */ |
987 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
988 | !sdata->u.mgd.associated) |
989 | continue; |
990 | /* do not count unused IBSS interfaces */ |
991 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
992 | !sdata->u.ibss.ssid_len) |
993 | continue; |
994 | /* count everything else */ |
995 | count++; |
996 | } |
997 | |
998 | if (!count) |
999 | return ieee80211_idle_on(local); |
1000 | else |
1001 | return ieee80211_idle_off(local, "in use"); |
1002 | |
1003 | return 0; |
1004 | } |
1005 | |
1006 | void ieee80211_recalc_idle(struct ieee80211_local *local) |
1007 | { |
1008 | u32 chg; |
1009 | |
1010 | mutex_lock(&local->iflist_mtx); |
1011 | chg = __ieee80211_recalc_idle(local); |
1012 | mutex_unlock(&local->iflist_mtx); |
1013 | if (chg) |
1014 | ieee80211_hw_config(local, chg); |
1015 | } |
1016 | |
1017 | static int netdev_notify(struct notifier_block *nb, |
1018 | unsigned long state, |
1019 | void *ndev) |
1020 | { |
1021 | struct net_device *dev = ndev; |
1022 | struct ieee80211_sub_if_data *sdata; |
1023 | |
1024 | if (state != NETDEV_CHANGENAME) |
1025 | return 0; |
1026 | |
1027 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) |
1028 | return 0; |
1029 | |
1030 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) |
1031 | return 0; |
1032 | |
1033 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1034 | |
1035 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
1036 | |
1037 | ieee80211_debugfs_rename_netdev(sdata); |
1038 | return 0; |
1039 | } |
1040 | |
1041 | static struct notifier_block mac80211_netdev_notifier = { |
1042 | .notifier_call = netdev_notify, |
1043 | }; |
1044 | |
1045 | int ieee80211_iface_init(void) |
1046 | { |
1047 | return register_netdevice_notifier(&mac80211_netdev_notifier); |
1048 | } |
1049 | |
1050 | void ieee80211_iface_exit(void) |
1051 | { |
1052 | unregister_netdevice_notifier(&mac80211_netdev_notifier); |
1053 | } |
1054 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9