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authorJohannes Berg <johannes@sipsolutions.net>2008-09-10 18:01:59 -0400
committerJohn W. Linville <linville@tuxdriver.com>2008-09-15 16:48:23 -0400
commit0d143fe1e2efc084fa730d2dfa22d0d1ca2ee5f1 (patch)
treed3a08fc38cad01024b37981e8258f84fe61d7ac3 /net/mac80211/main.c
parent05c914fe330fa8e1cc67870dc0d3809dfd96c107 (diff)
mac80211: move regular interface handling
Move the code to handle regular interfaces out of main.c and into iface.c, keep only the master interface stuff in main.c. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/main.c')
-rw-r--r--net/mac80211/main.c565
1 files changed, 15 insertions, 550 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 584a75bd6cfe..c532043c1a1c 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -45,16 +45,9 @@ struct ieee80211_tx_status_rtap_hdr {
45 u8 data_retries; 45 u8 data_retries;
46} __attribute__ ((packed)); 46} __attribute__ ((packed));
47 47
48/* common interface routines */
49
50static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
51{
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
53 return ETH_ALEN;
54}
55 48
56/* must be called under mdev tx lock */ 49/* must be called under mdev tx lock */
57static void ieee80211_configure_filter(struct ieee80211_local *local) 50void ieee80211_configure_filter(struct ieee80211_local *local)
58{ 51{
59 unsigned int changed_flags; 52 unsigned int changed_flags;
60 unsigned int new_flags = 0; 53 unsigned int new_flags = 0;
@@ -97,6 +90,20 @@ static void ieee80211_configure_filter(struct ieee80211_local *local)
97 90
98/* master interface */ 91/* master interface */
99 92
93static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
94{
95 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
96 return ETH_ALEN;
97}
98
99static const struct header_ops ieee80211_header_ops = {
100 .create = eth_header,
101 .parse = header_parse_80211,
102 .rebuild = eth_rebuild_header,
103 .cache = eth_header_cache,
104 .cache_update = eth_header_cache_update,
105};
106
100static int ieee80211_master_open(struct net_device *dev) 107static int ieee80211_master_open(struct net_device *dev)
101{ 108{
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 109 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
@@ -139,548 +146,6 @@ static void ieee80211_master_set_multicast_list(struct net_device *dev)
139 ieee80211_configure_filter(local); 146 ieee80211_configure_filter(local);
140} 147}
141 148
142/* regular interfaces */
143
144static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
145{
146 int meshhdrlen;
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
148
149 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
150
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
153 if (new_mtu < 256 ||
154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
155 return -EINVAL;
156 }
157
158#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
159 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
160#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
161 dev->mtu = new_mtu;
162 return 0;
163}
164
165static inline int identical_mac_addr_allowed(int type1, int type2)
166{
167 return type1 == NL80211_IFTYPE_MONITOR ||
168 type2 == NL80211_IFTYPE_MONITOR ||
169 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
170 (type1 == NL80211_IFTYPE_WDS &&
171 (type2 == NL80211_IFTYPE_WDS ||
172 type2 == NL80211_IFTYPE_AP)) ||
173 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
174 (type1 == NL80211_IFTYPE_AP_VLAN &&
175 (type2 == NL80211_IFTYPE_AP ||
176 type2 == NL80211_IFTYPE_AP_VLAN));
177}
178
179static int ieee80211_open(struct net_device *dev)
180{
181 struct ieee80211_sub_if_data *sdata, *nsdata;
182 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
183 struct sta_info *sta;
184 struct ieee80211_if_init_conf conf;
185 u32 changed = 0;
186 int res;
187 bool need_hw_reconfig = 0;
188 u8 null_addr[ETH_ALEN] = {0};
189
190 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
191
192 /* fail early if user set an invalid address */
193 if (compare_ether_addr(dev->dev_addr, null_addr) &&
194 !is_valid_ether_addr(dev->dev_addr))
195 return -EADDRNOTAVAIL;
196
197 /* we hold the RTNL here so can safely walk the list */
198 list_for_each_entry(nsdata, &local->interfaces, list) {
199 struct net_device *ndev = nsdata->dev;
200
201 if (ndev != dev && netif_running(ndev)) {
202 /*
203 * Allow only a single IBSS interface to be up at any
204 * time. This is restricted because beacon distribution
205 * cannot work properly if both are in the same IBSS.
206 *
207 * To remove this restriction we'd have to disallow them
208 * from setting the same SSID on different IBSS interfaces
209 * belonging to the same hardware. Then, however, we're
210 * faced with having to adopt two different TSF timers...
211 */
212 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
213 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
214 return -EBUSY;
215
216 /*
217 * The remaining checks are only performed for interfaces
218 * with the same MAC address.
219 */
220 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
221 continue;
222
223 /*
224 * check whether it may have the same address
225 */
226 if (!identical_mac_addr_allowed(sdata->vif.type,
227 nsdata->vif.type))
228 return -ENOTUNIQ;
229
230 /*
231 * can only add VLANs to enabled APs
232 */
233 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
234 nsdata->vif.type == NL80211_IFTYPE_AP)
235 sdata->bss = &nsdata->u.ap;
236 }
237 }
238
239 switch (sdata->vif.type) {
240 case NL80211_IFTYPE_WDS:
241 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
242 return -ENOLINK;
243 break;
244 case NL80211_IFTYPE_AP_VLAN:
245 if (!sdata->bss)
246 return -ENOLINK;
247 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
248 break;
249 case NL80211_IFTYPE_AP:
250 sdata->bss = &sdata->u.ap;
251 break;
252 case NL80211_IFTYPE_MESH_POINT:
253 if (!ieee80211_vif_is_mesh(&sdata->vif))
254 break;
255 /* mesh ifaces must set allmulti to forward mcast traffic */
256 atomic_inc(&local->iff_allmultis);
257 break;
258 case NL80211_IFTYPE_STATION:
259 case NL80211_IFTYPE_MONITOR:
260 case NL80211_IFTYPE_ADHOC:
261 /* no special treatment */
262 break;
263 case NL80211_IFTYPE_UNSPECIFIED:
264 case __NL80211_IFTYPE_AFTER_LAST:
265 /* cannot happen */
266 WARN_ON(1);
267 break;
268 }
269
270 if (local->open_count == 0) {
271 res = 0;
272 if (local->ops->start)
273 res = local->ops->start(local_to_hw(local));
274 if (res)
275 goto err_del_bss;
276 need_hw_reconfig = 1;
277 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
278 }
279
280 /*
281 * Check all interfaces and copy the hopefully now-present
282 * MAC address to those that have the special null one.
283 */
284 list_for_each_entry(nsdata, &local->interfaces, list) {
285 struct net_device *ndev = nsdata->dev;
286
287 /*
288 * No need to check netif_running since we do not allow
289 * it to start up with this invalid address.
290 */
291 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
292 memcpy(ndev->dev_addr,
293 local->hw.wiphy->perm_addr,
294 ETH_ALEN);
295 }
296
297 if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
298 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
299 ETH_ALEN);
300
301 /*
302 * Validate the MAC address for this device.
303 */
304 if (!is_valid_ether_addr(dev->dev_addr)) {
305 if (!local->open_count && local->ops->stop)
306 local->ops->stop(local_to_hw(local));
307 return -EADDRNOTAVAIL;
308 }
309
310 switch (sdata->vif.type) {
311 case NL80211_IFTYPE_AP_VLAN:
312 /* no need to tell driver */
313 break;
314 case NL80211_IFTYPE_MONITOR:
315 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
316 local->cooked_mntrs++;
317 break;
318 }
319
320 /* must be before the call to ieee80211_configure_filter */
321 local->monitors++;
322 if (local->monitors == 1)
323 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
324
325 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
326 local->fif_fcsfail++;
327 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
328 local->fif_plcpfail++;
329 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
330 local->fif_control++;
331 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
332 local->fif_other_bss++;
333
334 netif_addr_lock_bh(local->mdev);
335 ieee80211_configure_filter(local);
336 netif_addr_unlock_bh(local->mdev);
337 break;
338 case NL80211_IFTYPE_STATION:
339 case NL80211_IFTYPE_ADHOC:
340 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
341 /* fall through */
342 default:
343 conf.vif = &sdata->vif;
344 conf.type = sdata->vif.type;
345 conf.mac_addr = dev->dev_addr;
346 res = local->ops->add_interface(local_to_hw(local), &conf);
347 if (res)
348 goto err_stop;
349
350 if (ieee80211_vif_is_mesh(&sdata->vif))
351 ieee80211_start_mesh(sdata);
352 changed |= ieee80211_reset_erp_info(sdata);
353 ieee80211_bss_info_change_notify(sdata, changed);
354 ieee80211_enable_keys(sdata);
355
356 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
357 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
358 netif_carrier_off(dev);
359 else
360 netif_carrier_on(dev);
361 }
362
363 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
364 /* Create STA entry for the WDS peer */
365 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
366 GFP_KERNEL);
367 if (!sta) {
368 res = -ENOMEM;
369 goto err_del_interface;
370 }
371
372 /* no locking required since STA is not live yet */
373 sta->flags |= WLAN_STA_AUTHORIZED;
374
375 res = sta_info_insert(sta);
376 if (res) {
377 /* STA has been freed */
378 goto err_del_interface;
379 }
380 }
381
382 if (local->open_count == 0) {
383 res = dev_open(local->mdev);
384 WARN_ON(res);
385 if (res)
386 goto err_del_interface;
387 tasklet_enable(&local->tx_pending_tasklet);
388 tasklet_enable(&local->tasklet);
389 }
390
391 /*
392 * set_multicast_list will be invoked by the networking core
393 * which will check whether any increments here were done in
394 * error and sync them down to the hardware as filter flags.
395 */
396 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
397 atomic_inc(&local->iff_allmultis);
398
399 if (sdata->flags & IEEE80211_SDATA_PROMISC)
400 atomic_inc(&local->iff_promiscs);
401
402 local->open_count++;
403 if (need_hw_reconfig) {
404 ieee80211_hw_config(local);
405 /*
406 * set default queue parameters so drivers don't
407 * need to initialise the hardware if the hardware
408 * doesn't start up with sane defaults
409 */
410 ieee80211_set_wmm_default(sdata);
411 }
412
413 /*
414 * ieee80211_sta_work is disabled while network interface
415 * is down. Therefore, some configuration changes may not
416 * yet be effective. Trigger execution of ieee80211_sta_work
417 * to fix this.
418 */
419 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
420 sdata->vif.type == NL80211_IFTYPE_ADHOC) {
421 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
422 queue_work(local->hw.workqueue, &ifsta->work);
423 }
424
425 netif_tx_start_all_queues(dev);
426
427 return 0;
428 err_del_interface:
429 local->ops->remove_interface(local_to_hw(local), &conf);
430 err_stop:
431 if (!local->open_count && local->ops->stop)
432 local->ops->stop(local_to_hw(local));
433 err_del_bss:
434 sdata->bss = NULL;
435 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
436 list_del(&sdata->u.vlan.list);
437 return res;
438}
439
440static int ieee80211_stop(struct net_device *dev)
441{
442 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
443 struct ieee80211_local *local = sdata->local;
444 struct ieee80211_if_init_conf conf;
445 struct sta_info *sta;
446
447 /*
448 * Stop TX on this interface first.
449 */
450 netif_tx_stop_all_queues(dev);
451
452 /*
453 * Now delete all active aggregation sessions.
454 */
455 rcu_read_lock();
456
457 list_for_each_entry_rcu(sta, &local->sta_list, list) {
458 if (sta->sdata == sdata)
459 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
460 }
461
462 rcu_read_unlock();
463
464 /*
465 * Remove all stations associated with this interface.
466 *
467 * This must be done before calling ops->remove_interface()
468 * because otherwise we can later invoke ops->sta_notify()
469 * whenever the STAs are removed, and that invalidates driver
470 * assumptions about always getting a vif pointer that is valid
471 * (because if we remove a STA after ops->remove_interface()
472 * the driver will have removed the vif info already!)
473 *
474 * We could relax this and only unlink the stations from the
475 * hash table and list but keep them on a per-sdata list that
476 * will be inserted back again when the interface is brought
477 * up again, but I don't currently see a use case for that,
478 * except with WDS which gets a STA entry created when it is
479 * brought up.
480 */
481 sta_info_flush(local, sdata);
482
483 /*
484 * Don't count this interface for promisc/allmulti while it
485 * is down. dev_mc_unsync() will invoke set_multicast_list
486 * on the master interface which will sync these down to the
487 * hardware as filter flags.
488 */
489 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
490 atomic_dec(&local->iff_allmultis);
491
492 if (sdata->flags & IEEE80211_SDATA_PROMISC)
493 atomic_dec(&local->iff_promiscs);
494
495 dev_mc_unsync(local->mdev, dev);
496
497 /* APs need special treatment */
498 if (sdata->vif.type == NL80211_IFTYPE_AP) {
499 struct ieee80211_sub_if_data *vlan, *tmp;
500 struct beacon_data *old_beacon = sdata->u.ap.beacon;
501
502 /* remove beacon */
503 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
504 synchronize_rcu();
505 kfree(old_beacon);
506
507 /* down all dependent devices, that is VLANs */
508 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
509 u.vlan.list)
510 dev_close(vlan->dev);
511 WARN_ON(!list_empty(&sdata->u.ap.vlans));
512 }
513
514 local->open_count--;
515
516 switch (sdata->vif.type) {
517 case NL80211_IFTYPE_AP_VLAN:
518 list_del(&sdata->u.vlan.list);
519 /* no need to tell driver */
520 break;
521 case NL80211_IFTYPE_MONITOR:
522 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
523 local->cooked_mntrs--;
524 break;
525 }
526
527 local->monitors--;
528 if (local->monitors == 0)
529 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
530
531 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
532 local->fif_fcsfail--;
533 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
534 local->fif_plcpfail--;
535 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
536 local->fif_control--;
537 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
538 local->fif_other_bss--;
539
540 netif_addr_lock_bh(local->mdev);
541 ieee80211_configure_filter(local);
542 netif_addr_unlock_bh(local->mdev);
543 break;
544 case NL80211_IFTYPE_STATION:
545 case NL80211_IFTYPE_ADHOC:
546 sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
547 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
548 del_timer_sync(&sdata->u.sta.timer);
549 /*
550 * If the timer fired while we waited for it, it will have
551 * requeued the work. Now the work will be running again
552 * but will not rearm the timer again because it checks
553 * whether the interface is running, which, at this point,
554 * it no longer is.
555 */
556 cancel_work_sync(&sdata->u.sta.work);
557 /*
558 * When we get here, the interface is marked down.
559 * Call synchronize_rcu() to wait for the RX path
560 * should it be using the interface and enqueuing
561 * frames at this very time on another CPU.
562 */
563 synchronize_rcu();
564 skb_queue_purge(&sdata->u.sta.skb_queue);
565
566 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
567 kfree(sdata->u.sta.extra_ie);
568 sdata->u.sta.extra_ie = NULL;
569 sdata->u.sta.extra_ie_len = 0;
570 /* fall through */
571 case NL80211_IFTYPE_MESH_POINT:
572 if (ieee80211_vif_is_mesh(&sdata->vif)) {
573 /* allmulti is always set on mesh ifaces */
574 atomic_dec(&local->iff_allmultis);
575 ieee80211_stop_mesh(sdata);
576 }
577 /* fall through */
578 default:
579 if (local->scan_sdata == sdata) {
580 if (!local->ops->hw_scan)
581 cancel_delayed_work_sync(&local->scan_work);
582 /*
583 * The software scan can no longer run now, so we can
584 * clear out the scan_sdata reference. However, the
585 * hardware scan may still be running. The complete
586 * function must be prepared to handle a NULL value.
587 */
588 local->scan_sdata = NULL;
589 /*
590 * The memory barrier guarantees that another CPU
591 * that is hardware-scanning will now see the fact
592 * that this interface is gone.
593 */
594 smp_mb();
595 /*
596 * If software scanning, complete the scan but since
597 * the scan_sdata is NULL already don't send out a
598 * scan event to userspace -- the scan is incomplete.
599 */
600 if (local->sw_scanning)
601 ieee80211_scan_completed(&local->hw);
602 }
603
604 conf.vif = &sdata->vif;
605 conf.type = sdata->vif.type;
606 conf.mac_addr = dev->dev_addr;
607 /* disable all keys for as long as this netdev is down */
608 ieee80211_disable_keys(sdata);
609 local->ops->remove_interface(local_to_hw(local), &conf);
610 }
611
612 sdata->bss = NULL;
613
614 if (local->open_count == 0) {
615 if (netif_running(local->mdev))
616 dev_close(local->mdev);
617
618 if (local->ops->stop)
619 local->ops->stop(local_to_hw(local));
620
621 ieee80211_led_radio(local, 0);
622
623 flush_workqueue(local->hw.workqueue);
624
625 tasklet_disable(&local->tx_pending_tasklet);
626 tasklet_disable(&local->tasklet);
627 }
628
629 return 0;
630}
631
632static void ieee80211_set_multicast_list(struct net_device *dev)
633{
634 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
635 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
636 int allmulti, promisc, sdata_allmulti, sdata_promisc;
637
638 allmulti = !!(dev->flags & IFF_ALLMULTI);
639 promisc = !!(dev->flags & IFF_PROMISC);
640 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
641 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
642
643 if (allmulti != sdata_allmulti) {
644 if (dev->flags & IFF_ALLMULTI)
645 atomic_inc(&local->iff_allmultis);
646 else
647 atomic_dec(&local->iff_allmultis);
648 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
649 }
650
651 if (promisc != sdata_promisc) {
652 if (dev->flags & IFF_PROMISC)
653 atomic_inc(&local->iff_promiscs);
654 else
655 atomic_dec(&local->iff_promiscs);
656 sdata->flags ^= IEEE80211_SDATA_PROMISC;
657 }
658
659 dev_mc_sync(local->mdev, dev);
660}
661
662static const struct header_ops ieee80211_header_ops = {
663 .create = eth_header,
664 .parse = header_parse_80211,
665 .rebuild = eth_rebuild_header,
666 .cache = eth_header_cache,
667 .cache_update = eth_header_cache_update,
668};
669
670void ieee80211_if_setup(struct net_device *dev)
671{
672 ether_setup(dev);
673 dev->hard_start_xmit = ieee80211_subif_start_xmit;
674 dev->wireless_handlers = &ieee80211_iw_handler_def;
675 dev->set_multicast_list = ieee80211_set_multicast_list;
676 dev->change_mtu = ieee80211_change_mtu;
677 dev->open = ieee80211_open;
678 dev->stop = ieee80211_stop;
679 dev->destructor = free_netdev;
680 /* we will validate the address ourselves in ->open */
681 dev->validate_addr = NULL;
682}
683
684/* everything else */ 149/* everything else */
685 150
686int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) 151int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-13 23:23:43 -0500