Commit | Line | Data |
---|---|---|
f0706e82 | 1 | /* |
0d143fe1 JB |
2 | * Interface handling (except master interface) |
3 | * | |
f0706e82 JB |
4 | * Copyright 2002-2005, Instant802 Networks, Inc. |
5 | * Copyright 2005-2006, Devicescape Software, Inc. | |
6 | * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> | |
75636525 | 7 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
f0706e82 JB |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
f0706e82 JB |
14 | #include <linux/kernel.h> |
15 | #include <linux/if_arp.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/rtnetlink.h> | |
18 | #include <net/mac80211.h> | |
cf0277e7 | 19 | #include <net/ieee80211_radiotap.h> |
f0706e82 JB |
20 | #include "ieee80211_i.h" |
21 | #include "sta_info.h" | |
e9f207f0 | 22 | #include "debugfs_netdev.h" |
ee385855 | 23 | #include "mesh.h" |
0d143fe1 | 24 | #include "led.h" |
24487981 | 25 | #include "driver-ops.h" |
cf0277e7 | 26 | #include "wme.h" |
0d143fe1 | 27 | |
c771c9d8 JB |
28 | /** |
29 | * DOC: Interface list locking | |
30 | * | |
31 | * The interface list in each struct ieee80211_local is protected | |
32 | * three-fold: | |
33 | * | |
34 | * (1) modifications may only be done under the RTNL | |
35 | * (2) modifications and readers are protected against each other by | |
36 | * the iflist_mtx. | |
37 | * (3) modifications are done in an RCU manner so atomic readers | |
38 | * can traverse the list in RCU-safe blocks. | |
39 | * | |
40 | * As a consequence, reads (traversals) of the list can be protected | |
41 | * by either the RTNL, the iflist_mtx or RCU. | |
42 | */ | |
43 | ||
44 | ||
0d143fe1 JB |
45 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
46 | { | |
47 | int meshhdrlen; | |
48 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
49 | ||
50 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
51 | ||
52 | /* FIX: what would be proper limits for MTU? | |
53 | * This interface uses 802.3 frames. */ | |
54 | if (new_mtu < 256 || | |
55 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
56 | return -EINVAL; | |
57 | } | |
58 | ||
59 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
60 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
61 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
62 | dev->mtu = new_mtu; | |
63 | return 0; | |
64 | } | |
65 | ||
47846c9b JB |
66 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
67 | { | |
68 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
fc5f7577 | 69 | struct sockaddr *sa = addr; |
47846c9b JB |
70 | int ret; |
71 | ||
9607e6b6 | 72 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
73 | return -EBUSY; |
74 | ||
fc5f7577 | 75 | ret = eth_mac_addr(dev, sa); |
47846c9b JB |
76 | |
77 | if (ret == 0) | |
fc5f7577 | 78 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
47846c9b JB |
79 | |
80 | return ret; | |
81 | } | |
82 | ||
0d143fe1 JB |
83 | static inline int identical_mac_addr_allowed(int type1, int type2) |
84 | { | |
85 | return type1 == NL80211_IFTYPE_MONITOR || | |
86 | type2 == NL80211_IFTYPE_MONITOR || | |
87 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || | |
88 | (type1 == NL80211_IFTYPE_WDS && | |
89 | (type2 == NL80211_IFTYPE_WDS || | |
90 | type2 == NL80211_IFTYPE_AP)) || | |
91 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
92 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
93 | (type2 == NL80211_IFTYPE_AP || | |
94 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
95 | } | |
96 | ||
87490f6d JB |
97 | static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, |
98 | enum nl80211_iftype iftype) | |
0d143fe1 | 99 | { |
b4a4bf5d | 100 | struct ieee80211_local *local = sdata->local; |
87490f6d JB |
101 | struct ieee80211_sub_if_data *nsdata; |
102 | struct net_device *dev = sdata->dev; | |
0d143fe1 | 103 | |
87490f6d | 104 | ASSERT_RTNL(); |
0d143fe1 JB |
105 | |
106 | /* we hold the RTNL here so can safely walk the list */ | |
107 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
108 | struct net_device *ndev = nsdata->dev; | |
109 | ||
9607e6b6 | 110 | if (ndev != dev && ieee80211_sdata_running(nsdata)) { |
0d143fe1 JB |
111 | /* |
112 | * Allow only a single IBSS interface to be up at any | |
113 | * time. This is restricted because beacon distribution | |
114 | * cannot work properly if both are in the same IBSS. | |
115 | * | |
116 | * To remove this restriction we'd have to disallow them | |
117 | * from setting the same SSID on different IBSS interfaces | |
118 | * belonging to the same hardware. Then, however, we're | |
119 | * faced with having to adopt two different TSF timers... | |
120 | */ | |
87490f6d | 121 | if (iftype == NL80211_IFTYPE_ADHOC && |
0d143fe1 JB |
122 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
123 | return -EBUSY; | |
124 | ||
125 | /* | |
126 | * The remaining checks are only performed for interfaces | |
127 | * with the same MAC address. | |
128 | */ | |
129 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
130 | continue; | |
131 | ||
132 | /* | |
133 | * check whether it may have the same address | |
134 | */ | |
87490f6d | 135 | if (!identical_mac_addr_allowed(iftype, |
0d143fe1 JB |
136 | nsdata->vif.type)) |
137 | return -ENOTUNIQ; | |
138 | ||
139 | /* | |
140 | * can only add VLANs to enabled APs | |
141 | */ | |
87490f6d | 142 | if (iftype == NL80211_IFTYPE_AP_VLAN && |
0d143fe1 JB |
143 | nsdata->vif.type == NL80211_IFTYPE_AP) |
144 | sdata->bss = &nsdata->u.ap; | |
145 | } | |
146 | } | |
147 | ||
87490f6d JB |
148 | return 0; |
149 | } | |
150 | ||
34d4bc4d JB |
151 | /* |
152 | * NOTE: Be very careful when changing this function, it must NOT return | |
153 | * an error on interface type changes that have been pre-checked, so most | |
154 | * checks should be in ieee80211_check_concurrent_iface. | |
155 | */ | |
156 | static int ieee80211_do_open(struct net_device *dev, bool coming_up) | |
87490f6d JB |
157 | { |
158 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
159 | struct ieee80211_local *local = sdata->local; | |
160 | struct sta_info *sta; | |
161 | u32 changed = 0; | |
162 | int res; | |
163 | u32 hw_reconf_flags = 0; | |
164 | ||
0d143fe1 JB |
165 | switch (sdata->vif.type) { |
166 | case NL80211_IFTYPE_WDS: | |
167 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
168 | return -ENOLINK; | |
169 | break; | |
170 | case NL80211_IFTYPE_AP_VLAN: | |
171 | if (!sdata->bss) | |
172 | return -ENOLINK; | |
173 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); | |
174 | break; | |
175 | case NL80211_IFTYPE_AP: | |
176 | sdata->bss = &sdata->u.ap; | |
177 | break; | |
178 | case NL80211_IFTYPE_MESH_POINT: | |
179 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
180 | break; | |
181 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
182 | atomic_inc(&local->iff_allmultis); | |
183 | break; | |
184 | case NL80211_IFTYPE_STATION: | |
185 | case NL80211_IFTYPE_MONITOR: | |
186 | case NL80211_IFTYPE_ADHOC: | |
187 | /* no special treatment */ | |
188 | break; | |
189 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 190 | case NUM_NL80211_IFTYPES: |
0d143fe1 JB |
191 | /* cannot happen */ |
192 | WARN_ON(1); | |
193 | break; | |
194 | } | |
195 | ||
196 | if (local->open_count == 0) { | |
24487981 | 197 | res = drv_start(local); |
0d143fe1 JB |
198 | if (res) |
199 | goto err_del_bss; | |
4e6cbfd0 JL |
200 | if (local->ops->napi_poll) |
201 | napi_enable(&local->napi); | |
e8975581 JB |
202 | /* we're brought up, everything changes */ |
203 | hw_reconf_flags = ~0; | |
1f87f7d3 | 204 | ieee80211_led_radio(local, true); |
0d143fe1 JB |
205 | } |
206 | ||
207 | /* | |
bf533e0b JB |
208 | * Copy the hopefully now-present MAC address to |
209 | * this interface, if it has the special null one. | |
0d143fe1 | 210 | */ |
bf533e0b JB |
211 | if (is_zero_ether_addr(dev->dev_addr)) { |
212 | memcpy(dev->dev_addr, | |
213 | local->hw.wiphy->perm_addr, | |
214 | ETH_ALEN); | |
215 | memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); | |
216 | ||
217 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
218 | if (!local->open_count) | |
219 | drv_stop(local); | |
220 | return -EADDRNOTAVAIL; | |
0adc23f5 | 221 | } |
0d143fe1 JB |
222 | } |
223 | ||
0d143fe1 JB |
224 | switch (sdata->vif.type) { |
225 | case NL80211_IFTYPE_AP_VLAN: | |
226 | /* no need to tell driver */ | |
227 | break; | |
228 | case NL80211_IFTYPE_MONITOR: | |
229 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
230 | local->cooked_mntrs++; | |
231 | break; | |
232 | } | |
233 | ||
234 | /* must be before the call to ieee80211_configure_filter */ | |
235 | local->monitors++; | |
e8975581 | 236 | if (local->monitors == 1) { |
0869aea0 JB |
237 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
238 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 239 | } |
0d143fe1 JB |
240 | |
241 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
242 | local->fif_fcsfail++; | |
243 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
244 | local->fif_plcpfail++; | |
e3b90ca2 | 245 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
0d143fe1 | 246 | local->fif_control++; |
e3b90ca2 IP |
247 | local->fif_pspoll++; |
248 | } | |
0d143fe1 JB |
249 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
250 | local->fif_other_bss++; | |
251 | ||
0d143fe1 | 252 | ieee80211_configure_filter(local); |
53e9b1de DG |
253 | |
254 | netif_carrier_on(dev); | |
0d143fe1 | 255 | break; |
0d143fe1 | 256 | default: |
34d4bc4d JB |
257 | if (coming_up) { |
258 | res = drv_add_interface(local, &sdata->vif); | |
259 | if (res) | |
260 | goto err_stop; | |
261 | } | |
0d143fe1 | 262 | |
a3c9aa51 AY |
263 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
264 | local->fif_other_bss++; | |
a3c9aa51 | 265 | ieee80211_configure_filter(local); |
a3c9aa51 | 266 | |
0d143fe1 | 267 | ieee80211_start_mesh(sdata); |
e3b90ca2 IP |
268 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
269 | local->fif_pspoll++; | |
270 | ||
e3b90ca2 | 271 | ieee80211_configure_filter(local); |
a3c9aa51 | 272 | } |
e3b90ca2 | 273 | |
0d143fe1 JB |
274 | changed |= ieee80211_reset_erp_info(sdata); |
275 | ieee80211_bss_info_change_notify(sdata, changed); | |
0d143fe1 | 276 | |
7986cf95 | 277 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
0d143fe1 JB |
278 | netif_carrier_off(dev); |
279 | else | |
280 | netif_carrier_on(dev); | |
281 | } | |
282 | ||
283 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { | |
284 | /* Create STA entry for the WDS peer */ | |
285 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
286 | GFP_KERNEL); | |
287 | if (!sta) { | |
288 | res = -ENOMEM; | |
289 | goto err_del_interface; | |
290 | } | |
291 | ||
292 | /* no locking required since STA is not live yet */ | |
293 | sta->flags |= WLAN_STA_AUTHORIZED; | |
294 | ||
295 | res = sta_info_insert(sta); | |
296 | if (res) { | |
297 | /* STA has been freed */ | |
298 | goto err_del_interface; | |
299 | } | |
300 | } | |
301 | ||
0d143fe1 JB |
302 | /* |
303 | * set_multicast_list will be invoked by the networking core | |
304 | * which will check whether any increments here were done in | |
305 | * error and sync them down to the hardware as filter flags. | |
306 | */ | |
307 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
308 | atomic_inc(&local->iff_allmultis); | |
309 | ||
310 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
311 | atomic_inc(&local->iff_promiscs); | |
312 | ||
7da7cc1d | 313 | mutex_lock(&local->mtx); |
5cff20e6 | 314 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
7da7cc1d | 315 | mutex_unlock(&local->mtx); |
5cff20e6 | 316 | |
34d4bc4d JB |
317 | if (coming_up) |
318 | local->open_count++; | |
319 | ||
e8975581 JB |
320 | if (hw_reconf_flags) { |
321 | ieee80211_hw_config(local, hw_reconf_flags); | |
0d143fe1 JB |
322 | /* |
323 | * set default queue parameters so drivers don't | |
324 | * need to initialise the hardware if the hardware | |
325 | * doesn't start up with sane defaults | |
326 | */ | |
327 | ieee80211_set_wmm_default(sdata); | |
328 | } | |
329 | ||
10f644a4 | 330 | ieee80211_recalc_ps(local, -1); |
965bedad | 331 | |
8a5b33f5 | 332 | netif_tx_start_all_queues(dev); |
0d143fe1 | 333 | |
34d4bc4d JB |
334 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
335 | ||
0d143fe1 JB |
336 | return 0; |
337 | err_del_interface: | |
1ed32e4f | 338 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 | 339 | err_stop: |
24487981 JB |
340 | if (!local->open_count) |
341 | drv_stop(local); | |
0d143fe1 JB |
342 | err_del_bss: |
343 | sdata->bss = NULL; | |
344 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
345 | list_del(&sdata->u.vlan.list); | |
346 | return res; | |
347 | } | |
348 | ||
34d4bc4d | 349 | static int ieee80211_open(struct net_device *dev) |
0d143fe1 JB |
350 | { |
351 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
34d4bc4d JB |
352 | int err; |
353 | ||
354 | /* fail early if user set an invalid address */ | |
355 | if (!is_zero_ether_addr(dev->dev_addr) && | |
356 | !is_valid_ether_addr(dev->dev_addr)) | |
357 | return -EADDRNOTAVAIL; | |
358 | ||
359 | err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); | |
360 | if (err) | |
361 | return err; | |
362 | ||
363 | return ieee80211_do_open(dev, true); | |
364 | } | |
365 | ||
366 | static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, | |
367 | bool going_down) | |
368 | { | |
0d143fe1 | 369 | struct ieee80211_local *local = sdata->local; |
5061b0c2 JB |
370 | unsigned long flags; |
371 | struct sk_buff *skb, *tmp; | |
e8975581 | 372 | u32 hw_reconf_flags = 0; |
5061b0c2 | 373 | int i; |
0d143fe1 | 374 | |
34d4bc4d JB |
375 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
376 | ||
0d143fe1 JB |
377 | /* |
378 | * Stop TX on this interface first. | |
379 | */ | |
34d4bc4d | 380 | netif_tx_stop_all_queues(sdata->dev); |
0d143fe1 | 381 | |
af6b6374 JB |
382 | /* |
383 | * Purge work for this interface. | |
384 | */ | |
385 | ieee80211_work_purge(sdata); | |
386 | ||
0d143fe1 JB |
387 | /* |
388 | * Remove all stations associated with this interface. | |
389 | * | |
390 | * This must be done before calling ops->remove_interface() | |
391 | * because otherwise we can later invoke ops->sta_notify() | |
392 | * whenever the STAs are removed, and that invalidates driver | |
393 | * assumptions about always getting a vif pointer that is valid | |
394 | * (because if we remove a STA after ops->remove_interface() | |
395 | * the driver will have removed the vif info already!) | |
396 | * | |
b9dcf712 JB |
397 | * This is relevant only in AP, WDS and mesh modes, since in |
398 | * all other modes we've already removed all stations when | |
399 | * disconnecting etc. | |
0d143fe1 JB |
400 | */ |
401 | sta_info_flush(local, sdata); | |
402 | ||
403 | /* | |
404 | * Don't count this interface for promisc/allmulti while it | |
405 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
406 | * on the master interface which will sync these down to the | |
407 | * hardware as filter flags. | |
408 | */ | |
409 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
410 | atomic_dec(&local->iff_allmultis); | |
411 | ||
412 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
413 | atomic_dec(&local->iff_promiscs); | |
414 | ||
e3b90ca2 IP |
415 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
416 | local->fif_pspoll--; | |
417 | ||
34d4bc4d | 418 | netif_addr_lock_bh(sdata->dev); |
3b8d81e0 | 419 | spin_lock_bh(&local->filter_lock); |
34d4bc4d JB |
420 | __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, |
421 | sdata->dev->addr_len); | |
3b8d81e0 | 422 | spin_unlock_bh(&local->filter_lock); |
34d4bc4d | 423 | netif_addr_unlock_bh(sdata->dev); |
3b8d81e0 | 424 | |
3ac64bee JB |
425 | ieee80211_configure_filter(local); |
426 | ||
7cbf0ba5 VN |
427 | del_timer_sync(&local->dynamic_ps_timer); |
428 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 JB |
429 | |
430 | /* APs need special treatment */ | |
431 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 432 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
433 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
434 | ||
b9dcf712 JB |
435 | /* sdata_running will return false, so this will disable */ |
436 | ieee80211_bss_info_change_notify(sdata, | |
437 | BSS_CHANGED_BEACON_ENABLED); | |
438 | ||
0d143fe1 JB |
439 | /* remove beacon */ |
440 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
441 | synchronize_rcu(); | |
442 | kfree(old_beacon); | |
443 | ||
b9dcf712 JB |
444 | /* free all potentially still buffered bcast frames */ |
445 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { | |
446 | local->total_ps_buffered--; | |
447 | dev_kfree_skb(skb); | |
448 | } | |
449 | ||
0d143fe1 | 450 | /* down all dependent devices, that is VLANs */ |
57c9fff3 | 451 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
452 | u.vlan.list) |
453 | dev_close(vlan->dev); | |
454 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
455 | } | |
456 | ||
34d4bc4d JB |
457 | if (going_down) |
458 | local->open_count--; | |
0d143fe1 JB |
459 | |
460 | switch (sdata->vif.type) { | |
461 | case NL80211_IFTYPE_AP_VLAN: | |
462 | list_del(&sdata->u.vlan.list); | |
463 | /* no need to tell driver */ | |
464 | break; | |
465 | case NL80211_IFTYPE_MONITOR: | |
466 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
467 | local->cooked_mntrs--; | |
468 | break; | |
469 | } | |
470 | ||
471 | local->monitors--; | |
e8975581 | 472 | if (local->monitors == 0) { |
0869aea0 JB |
473 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
474 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 475 | } |
0d143fe1 JB |
476 | |
477 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
478 | local->fif_fcsfail--; | |
479 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
480 | local->fif_plcpfail--; | |
e3b90ca2 IP |
481 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
482 | local->fif_pspoll--; | |
0d143fe1 | 483 | local->fif_control--; |
e3b90ca2 | 484 | } |
0d143fe1 JB |
485 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
486 | local->fif_other_bss--; | |
487 | ||
0d143fe1 | 488 | ieee80211_configure_filter(local); |
0d143fe1 | 489 | break; |
0d143fe1 JB |
490 | case NL80211_IFTYPE_MESH_POINT: |
491 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
492 | /* other_bss and allmulti are always set on mesh |
493 | * ifaces */ | |
494 | local->fif_other_bss--; | |
0d143fe1 | 495 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 | 496 | |
a3c9aa51 | 497 | ieee80211_configure_filter(local); |
a3c9aa51 | 498 | |
0d143fe1 JB |
499 | ieee80211_stop_mesh(sdata); |
500 | } | |
501 | /* fall through */ | |
502 | default: | |
c1475ca9 | 503 | flush_work(&sdata->work); |
35f20c14 JB |
504 | /* |
505 | * When we get here, the interface is marked down. | |
506 | * Call synchronize_rcu() to wait for the RX path | |
507 | * should it be using the interface and enqueuing | |
508 | * frames at this very time on another CPU. | |
509 | */ | |
510 | synchronize_rcu(); | |
511 | skb_queue_purge(&sdata->skb_queue); | |
512 | ||
15db0b7f JB |
513 | if (local->scan_sdata == sdata) |
514 | ieee80211_scan_cancel(local); | |
0d143fe1 | 515 | |
97af7432 | 516 | /* |
b9dcf712 JB |
517 | * Disable beaconing here for mesh only, AP and IBSS |
518 | * are already taken care of. | |
97af7432 | 519 | */ |
b9dcf712 | 520 | if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
97af7432 BC |
521 | ieee80211_bss_info_change_notify(sdata, |
522 | BSS_CHANGED_BEACON_ENABLED); | |
97af7432 | 523 | |
b9dcf712 JB |
524 | /* |
525 | * Free all remaining keys, there shouldn't be any, | |
526 | * except maybe group keys in AP more or WDS? | |
527 | */ | |
ad0e2b5a | 528 | ieee80211_free_keys(sdata); |
b9dcf712 | 529 | |
34d4bc4d JB |
530 | if (going_down) |
531 | drv_remove_interface(local, &sdata->vif); | |
0d143fe1 JB |
532 | } |
533 | ||
534 | sdata->bss = NULL; | |
535 | ||
7da7cc1d | 536 | mutex_lock(&local->mtx); |
5cff20e6 | 537 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
7da7cc1d | 538 | mutex_unlock(&local->mtx); |
5cff20e6 JB |
539 | |
540 | ieee80211_recalc_ps(local, -1); | |
541 | ||
0d143fe1 | 542 | if (local->open_count == 0) { |
4e6cbfd0 JL |
543 | if (local->ops->napi_poll) |
544 | napi_disable(&local->napi); | |
ea77f12f | 545 | ieee80211_clear_tx_pending(local); |
84f6a01c | 546 | ieee80211_stop_device(local); |
0d143fe1 | 547 | |
e8975581 JB |
548 | /* no reconfiguring after stop! */ |
549 | hw_reconf_flags = 0; | |
0d143fe1 JB |
550 | } |
551 | ||
e8975581 JB |
552 | /* do after stop to avoid reconfiguring when we stop anyway */ |
553 | if (hw_reconf_flags) | |
554 | ieee80211_hw_config(local, hw_reconf_flags); | |
555 | ||
5061b0c2 JB |
556 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
557 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
558 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
559 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
560 | if (info->control.vif == &sdata->vif) { | |
561 | __skb_unlink(skb, &local->pending[i]); | |
562 | dev_kfree_skb_irq(skb); | |
563 | } | |
564 | } | |
565 | } | |
566 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
34d4bc4d JB |
567 | } |
568 | ||
569 | static int ieee80211_stop(struct net_device *dev) | |
570 | { | |
571 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
572 | ||
573 | ieee80211_do_stop(sdata, true); | |
5061b0c2 | 574 | |
0d143fe1 JB |
575 | return 0; |
576 | } | |
577 | ||
578 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
579 | { | |
0d143fe1 | 580 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 581 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
582 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
583 | ||
584 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
585 | promisc = !!(dev->flags & IFF_PROMISC); | |
586 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
587 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
588 | ||
589 | if (allmulti != sdata_allmulti) { | |
590 | if (dev->flags & IFF_ALLMULTI) | |
591 | atomic_inc(&local->iff_allmultis); | |
592 | else | |
593 | atomic_dec(&local->iff_allmultis); | |
594 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
595 | } | |
596 | ||
597 | if (promisc != sdata_promisc) { | |
598 | if (dev->flags & IFF_PROMISC) | |
599 | atomic_inc(&local->iff_promiscs); | |
600 | else | |
601 | atomic_dec(&local->iff_promiscs); | |
602 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
603 | } | |
3b8d81e0 | 604 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 605 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 606 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 607 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
608 | } |
609 | ||
75636525 JB |
610 | /* |
611 | * Called when the netdev is removed or, by the code below, before | |
612 | * the interface type changes. | |
613 | */ | |
614 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 615 | { |
75636525 JB |
616 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
617 | struct ieee80211_local *local = sdata->local; | |
75636525 | 618 | int flushed; |
f0706e82 JB |
619 | int i; |
620 | ||
75636525 JB |
621 | /* free extra data */ |
622 | ieee80211_free_keys(sdata); | |
623 | ||
aee14ceb JM |
624 | ieee80211_debugfs_remove_netdev(sdata); |
625 | ||
f0706e82 | 626 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
627 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
628 | sdata->fragment_next = 0; | |
11a843b7 | 629 | |
b9dcf712 JB |
630 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
631 | mesh_rmc_free(sdata); | |
75636525 JB |
632 | |
633 | flushed = sta_info_flush(local, sdata); | |
634 | WARN_ON(flushed); | |
f0706e82 JB |
635 | } |
636 | ||
cf0277e7 JB |
637 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
638 | struct sk_buff *skb) | |
639 | { | |
640 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
641 | } | |
642 | ||
587e729e JB |
643 | static const struct net_device_ops ieee80211_dataif_ops = { |
644 | .ndo_open = ieee80211_open, | |
645 | .ndo_stop = ieee80211_stop, | |
646 | .ndo_uninit = ieee80211_teardown_sdata, | |
647 | .ndo_start_xmit = ieee80211_subif_start_xmit, | |
648 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
649 | .ndo_change_mtu = ieee80211_change_mtu, | |
47846c9b | 650 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 651 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
652 | }; |
653 | ||
cf0277e7 JB |
654 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
655 | struct sk_buff *skb) | |
656 | { | |
657 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
658 | struct ieee80211_local *local = sdata->local; | |
659 | struct ieee80211_hdr *hdr; | |
660 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
193e70ef | 661 | u8 *p; |
cf0277e7 JB |
662 | |
663 | if (local->hw.queues < 4) | |
664 | return 0; | |
665 | ||
666 | if (skb->len < 4 || | |
b49bb574 | 667 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
668 | return 0; /* doesn't matter, frame will be dropped */ |
669 | ||
b49bb574 | 670 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 671 | |
861a57cd | 672 | if (!ieee80211_is_data(hdr->frame_control)) { |
cf0277e7 JB |
673 | skb->priority = 7; |
674 | return ieee802_1d_to_ac[skb->priority]; | |
675 | } | |
861a57cd FF |
676 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
677 | skb->priority = 0; | |
678 | return ieee802_1d_to_ac[skb->priority]; | |
679 | } | |
cf0277e7 | 680 | |
193e70ef FF |
681 | p = ieee80211_get_qos_ctl(hdr); |
682 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
683 | ||
cf0277e7 JB |
684 | return ieee80211_downgrade_queue(local, skb); |
685 | } | |
686 | ||
587e729e JB |
687 | static const struct net_device_ops ieee80211_monitorif_ops = { |
688 | .ndo_open = ieee80211_open, | |
689 | .ndo_stop = ieee80211_stop, | |
690 | .ndo_uninit = ieee80211_teardown_sdata, | |
691 | .ndo_start_xmit = ieee80211_monitor_start_xmit, | |
692 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
693 | .ndo_change_mtu = ieee80211_change_mtu, | |
694 | .ndo_set_mac_address = eth_mac_addr, | |
cf0277e7 | 695 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
696 | }; |
697 | ||
698 | static void ieee80211_if_setup(struct net_device *dev) | |
699 | { | |
700 | ether_setup(dev); | |
701 | dev->netdev_ops = &ieee80211_dataif_ops; | |
587e729e JB |
702 | dev->destructor = free_netdev; |
703 | } | |
704 | ||
1fa57d01 JB |
705 | static void ieee80211_iface_work(struct work_struct *work) |
706 | { | |
707 | struct ieee80211_sub_if_data *sdata = | |
708 | container_of(work, struct ieee80211_sub_if_data, work); | |
709 | struct ieee80211_local *local = sdata->local; | |
710 | struct sk_buff *skb; | |
344eec67 | 711 | struct sta_info *sta; |
c1475ca9 | 712 | struct ieee80211_ra_tid *ra_tid; |
1fa57d01 JB |
713 | |
714 | if (!ieee80211_sdata_running(sdata)) | |
715 | return; | |
716 | ||
717 | if (local->scanning) | |
718 | return; | |
719 | ||
720 | /* | |
721 | * ieee80211_queue_work() should have picked up most cases, | |
722 | * here we'll pick the rest. | |
723 | */ | |
724 | if (WARN(local->suspended, | |
725 | "interface work scheduled while going to suspend\n")) | |
726 | return; | |
727 | ||
728 | /* first process frames */ | |
729 | while ((skb = skb_dequeue(&sdata->skb_queue))) { | |
bed7ee6e JB |
730 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
731 | ||
c1475ca9 JB |
732 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
733 | ra_tid = (void *)&skb->cb; | |
734 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
735 | ra_tid->tid); | |
736 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { | |
737 | ra_tid = (void *)&skb->cb; | |
738 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
739 | ra_tid->tid); | |
740 | } else if (ieee80211_is_action(mgmt->frame_control) && | |
741 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { | |
bed7ee6e | 742 | int len = skb->len; |
bed7ee6e | 743 | |
a93e3644 | 744 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 745 | sta = sta_info_get_bss(sdata, mgmt->sa); |
bed7ee6e JB |
746 | if (sta) { |
747 | switch (mgmt->u.action.u.addba_req.action_code) { | |
748 | case WLAN_ACTION_ADDBA_REQ: | |
749 | ieee80211_process_addba_request( | |
750 | local, sta, mgmt, len); | |
751 | break; | |
752 | case WLAN_ACTION_ADDBA_RESP: | |
753 | ieee80211_process_addba_resp(local, sta, | |
754 | mgmt, len); | |
755 | break; | |
756 | case WLAN_ACTION_DELBA: | |
757 | ieee80211_process_delba(sdata, sta, | |
758 | mgmt, len); | |
759 | break; | |
760 | default: | |
761 | WARN_ON(1); | |
762 | break; | |
763 | } | |
764 | } | |
a93e3644 | 765 | mutex_unlock(&local->sta_mtx); |
344eec67 JB |
766 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
767 | struct ieee80211_hdr *hdr = (void *)mgmt; | |
768 | /* | |
769 | * So the frame isn't mgmt, but frame_control | |
770 | * is at the right place anyway, of course, so | |
771 | * the if statement is correct. | |
772 | * | |
773 | * Warn if we have other data frame types here, | |
774 | * they must not get here. | |
775 | */ | |
776 | WARN_ON(hdr->frame_control & | |
777 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); | |
778 | WARN_ON(!(hdr->seq_ctrl & | |
779 | cpu_to_le16(IEEE80211_SCTL_FRAG))); | |
780 | /* | |
781 | * This was a fragment of a frame, received while | |
782 | * a block-ack session was active. That cannot be | |
783 | * right, so terminate the session. | |
784 | */ | |
a93e3644 | 785 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 786 | sta = sta_info_get_bss(sdata, mgmt->sa); |
344eec67 JB |
787 | if (sta) { |
788 | u16 tid = *ieee80211_get_qos_ctl(hdr) & | |
789 | IEEE80211_QOS_CTL_TID_MASK; | |
790 | ||
791 | __ieee80211_stop_rx_ba_session( | |
792 | sta, tid, WLAN_BACK_RECIPIENT, | |
793 | WLAN_REASON_QSTA_REQUIRE_SETUP); | |
794 | } | |
a93e3644 | 795 | mutex_unlock(&local->sta_mtx); |
bed7ee6e | 796 | } else switch (sdata->vif.type) { |
1fa57d01 JB |
797 | case NL80211_IFTYPE_STATION: |
798 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
799 | break; | |
800 | case NL80211_IFTYPE_ADHOC: | |
801 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
802 | break; | |
803 | case NL80211_IFTYPE_MESH_POINT: | |
804 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
805 | break; | |
806 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
807 | break; | |
808 | default: | |
809 | WARN(1, "frame for unexpected interface type"); | |
1fa57d01 JB |
810 | break; |
811 | } | |
36b3a628 JB |
812 | |
813 | kfree_skb(skb); | |
1fa57d01 JB |
814 | } |
815 | ||
816 | /* then other type-dependent work */ | |
817 | switch (sdata->vif.type) { | |
818 | case NL80211_IFTYPE_STATION: | |
819 | ieee80211_sta_work(sdata); | |
820 | break; | |
821 | case NL80211_IFTYPE_ADHOC: | |
822 | ieee80211_ibss_work(sdata); | |
823 | break; | |
824 | case NL80211_IFTYPE_MESH_POINT: | |
825 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
826 | break; | |
827 | ieee80211_mesh_work(sdata); | |
828 | break; | |
829 | default: | |
830 | break; | |
831 | } | |
832 | } | |
833 | ||
834 | ||
75636525 JB |
835 | /* |
836 | * Helper function to initialise an interface to a specific type. | |
837 | */ | |
838 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 839 | enum nl80211_iftype type) |
f0706e82 | 840 | { |
75636525 JB |
841 | /* clear type-dependent union */ |
842 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
843 | ||
844 | /* and set some type-dependent values */ | |
845 | sdata->vif.type = type; | |
587e729e | 846 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
60719ffd | 847 | sdata->wdev.iftype = type; |
75636525 | 848 | |
a621fa4d JB |
849 | sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
850 | sdata->control_port_no_encrypt = false; | |
851 | ||
75636525 JB |
852 | /* only monitor differs */ |
853 | sdata->dev->type = ARPHRD_ETHER; | |
854 | ||
35f20c14 | 855 | skb_queue_head_init(&sdata->skb_queue); |
1fa57d01 | 856 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
35f20c14 | 857 | |
75636525 | 858 | switch (type) { |
05c914fe | 859 | case NL80211_IFTYPE_AP: |
75636525 JB |
860 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
861 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
862 | break; | |
05c914fe | 863 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 864 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 865 | break; |
46900298 JB |
866 | case NL80211_IFTYPE_ADHOC: |
867 | ieee80211_ibss_setup_sdata(sdata); | |
868 | break; | |
05c914fe | 869 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
870 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
871 | ieee80211_mesh_init_sdata(sdata); | |
872 | break; | |
05c914fe | 873 | case NL80211_IFTYPE_MONITOR: |
75636525 | 874 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 875 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
876 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
877 | MONITOR_FLAG_OTHER_BSS; | |
878 | break; | |
05c914fe JB |
879 | case NL80211_IFTYPE_WDS: |
880 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 881 | break; |
05c914fe | 882 | case NL80211_IFTYPE_UNSPECIFIED: |
2e161f78 | 883 | case NUM_NL80211_IFTYPES: |
75636525 JB |
884 | BUG(); |
885 | break; | |
886 | } | |
887 | ||
888 | ieee80211_debugfs_add_netdev(sdata); | |
889 | } | |
890 | ||
34d4bc4d JB |
891 | static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
892 | enum nl80211_iftype type) | |
893 | { | |
894 | struct ieee80211_local *local = sdata->local; | |
895 | int ret, err; | |
896 | ||
897 | ASSERT_RTNL(); | |
898 | ||
899 | if (!local->ops->change_interface) | |
900 | return -EBUSY; | |
901 | ||
902 | switch (sdata->vif.type) { | |
903 | case NL80211_IFTYPE_AP: | |
904 | case NL80211_IFTYPE_STATION: | |
905 | case NL80211_IFTYPE_ADHOC: | |
906 | /* | |
907 | * Could maybe also all others here? | |
908 | * Just not sure how that interacts | |
909 | * with the RX/config path e.g. for | |
910 | * mesh. | |
911 | */ | |
912 | break; | |
913 | default: | |
914 | return -EBUSY; | |
915 | } | |
916 | ||
917 | switch (type) { | |
918 | case NL80211_IFTYPE_AP: | |
919 | case NL80211_IFTYPE_STATION: | |
920 | case NL80211_IFTYPE_ADHOC: | |
921 | /* | |
922 | * Could probably support everything | |
923 | * but WDS here (WDS do_open can fail | |
924 | * under memory pressure, which this | |
925 | * code isn't prepared to handle). | |
926 | */ | |
927 | break; | |
928 | default: | |
929 | return -EBUSY; | |
930 | } | |
931 | ||
932 | ret = ieee80211_check_concurrent_iface(sdata, type); | |
933 | if (ret) | |
934 | return ret; | |
935 | ||
936 | ieee80211_do_stop(sdata, false); | |
937 | ||
938 | ieee80211_teardown_sdata(sdata->dev); | |
939 | ||
940 | ret = drv_change_interface(local, sdata, type); | |
941 | if (ret) | |
942 | type = sdata->vif.type; | |
943 | ||
944 | ieee80211_setup_sdata(sdata, type); | |
945 | ||
946 | err = ieee80211_do_open(sdata->dev, false); | |
947 | WARN(err, "type change: do_open returned %d", err); | |
948 | ||
949 | return ret; | |
950 | } | |
951 | ||
f3947e2d | 952 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 953 | enum nl80211_iftype type) |
75636525 | 954 | { |
34d4bc4d JB |
955 | int ret; |
956 | ||
f3947e2d JB |
957 | ASSERT_RTNL(); |
958 | ||
959 | if (type == sdata->vif.type) | |
960 | return 0; | |
961 | ||
e60c7744 | 962 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
963 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
964 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
965 | return -EOPNOTSUPP; |
966 | ||
34d4bc4d JB |
967 | if (ieee80211_sdata_running(sdata)) { |
968 | ret = ieee80211_runtime_change_iftype(sdata, type); | |
969 | if (ret) | |
970 | return ret; | |
971 | } else { | |
972 | /* Purge and reset type-dependent state. */ | |
973 | ieee80211_teardown_sdata(sdata->dev); | |
974 | ieee80211_setup_sdata(sdata, type); | |
975 | } | |
75636525 JB |
976 | |
977 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 978 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
979 | ieee80211_mandatory_rates(sdata->local, |
980 | sdata->local->hw.conf.channel->band); | |
75636525 | 981 | sdata->drop_unencrypted = 0; |
9bc383de JB |
982 | if (type == NL80211_IFTYPE_STATION) |
983 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
984 | |
985 | return 0; | |
f0706e82 JB |
986 | } |
987 | ||
fa9029f8 JB |
988 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
989 | struct net_device *dev, | |
990 | enum nl80211_iftype type) | |
991 | { | |
992 | struct ieee80211_sub_if_data *sdata; | |
993 | u64 mask, start, addr, val, inc; | |
994 | u8 *m; | |
995 | u8 tmp_addr[ETH_ALEN]; | |
996 | int i; | |
997 | ||
998 | /* default ... something at least */ | |
999 | memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
1000 | ||
1001 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
1002 | local->hw.wiphy->n_addresses <= 1) | |
1003 | return; | |
1004 | ||
1005 | ||
1006 | mutex_lock(&local->iflist_mtx); | |
1007 | ||
1008 | switch (type) { | |
1009 | case NL80211_IFTYPE_MONITOR: | |
1010 | /* doesn't matter */ | |
1011 | break; | |
1012 | case NL80211_IFTYPE_WDS: | |
1013 | case NL80211_IFTYPE_AP_VLAN: | |
1014 | /* match up with an AP interface */ | |
1015 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1016 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1017 | continue; | |
1018 | memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); | |
1019 | break; | |
1020 | } | |
1021 | /* keep default if no AP interface present */ | |
1022 | break; | |
1023 | default: | |
1024 | /* assign a new address if possible -- try n_addresses first */ | |
1025 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
1026 | bool used = false; | |
1027 | ||
1028 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1029 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
1030 | sdata->vif.addr, ETH_ALEN) == 0) { | |
1031 | used = true; | |
1032 | break; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | if (!used) { | |
1037 | memcpy(dev->perm_addr, | |
1038 | local->hw.wiphy->addresses[i].addr, | |
1039 | ETH_ALEN); | |
1040 | break; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | /* try mask if available */ | |
1045 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
1046 | break; | |
1047 | ||
1048 | m = local->hw.wiphy->addr_mask; | |
1049 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1050 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1051 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1052 | ||
1053 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
1054 | /* not a contiguous mask ... not handled now! */ | |
1055 | printk(KERN_DEBUG "not contiguous\n"); | |
1056 | break; | |
1057 | } | |
1058 | ||
1059 | m = local->hw.wiphy->perm_addr; | |
1060 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1061 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1062 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1063 | ||
1064 | inc = 1ULL<<__ffs64(mask); | |
1065 | val = (start & mask); | |
1066 | addr = (start & ~mask) | (val & mask); | |
1067 | do { | |
1068 | bool used = false; | |
1069 | ||
1070 | tmp_addr[5] = addr >> 0*8; | |
1071 | tmp_addr[4] = addr >> 1*8; | |
1072 | tmp_addr[3] = addr >> 2*8; | |
1073 | tmp_addr[2] = addr >> 3*8; | |
1074 | tmp_addr[1] = addr >> 4*8; | |
1075 | tmp_addr[0] = addr >> 5*8; | |
1076 | ||
1077 | val += inc; | |
1078 | ||
1079 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1080 | if (memcmp(tmp_addr, sdata->vif.addr, | |
1081 | ETH_ALEN) == 0) { | |
1082 | used = true; | |
1083 | break; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | if (!used) { | |
1088 | memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); | |
1089 | break; | |
1090 | } | |
1091 | addr = (start & ~mask) | (val & mask); | |
1092 | } while (addr != start); | |
1093 | ||
1094 | break; | |
1095 | } | |
1096 | ||
1097 | mutex_unlock(&local->iflist_mtx); | |
1098 | } | |
1099 | ||
3e122be0 | 1100 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 1101 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 1102 | struct vif_params *params) |
f0706e82 JB |
1103 | { |
1104 | struct net_device *ndev; | |
f0706e82 | 1105 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 1106 | int ret, i; |
f0706e82 JB |
1107 | |
1108 | ASSERT_RTNL(); | |
75636525 | 1109 | |
cf0277e7 JB |
1110 | ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, |
1111 | name, ieee80211_if_setup, local->hw.queues); | |
f0706e82 JB |
1112 | if (!ndev) |
1113 | return -ENOMEM; | |
a272a720 | 1114 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
f0706e82 | 1115 | |
f3994ece JB |
1116 | ndev->needed_headroom = local->tx_headroom + |
1117 | 4*6 /* four MAC addresses */ | |
1118 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
1119 | + 6 /* mesh */ | |
1120 | + 8 /* rfc1042/bridge tunnel */ | |
1121 | - ETH_HLEN /* ethernet hard_header_len */ | |
1122 | + IEEE80211_ENCRYPT_HEADROOM; | |
1123 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
1124 | ||
f0706e82 JB |
1125 | ret = dev_alloc_name(ndev, ndev->name); |
1126 | if (ret < 0) | |
1127 | goto fail; | |
1128 | ||
fa9029f8 JB |
1129 | ieee80211_assign_perm_addr(local, ndev, type); |
1130 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
f0706e82 JB |
1131 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
1132 | ||
3e122be0 JB |
1133 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
1134 | sdata = netdev_priv(ndev); | |
f0706e82 | 1135 | ndev->ieee80211_ptr = &sdata->wdev; |
47846c9b JB |
1136 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
1137 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
75636525 JB |
1138 | |
1139 | /* initialise type-independent data */ | |
f0706e82 | 1140 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 1141 | sdata->local = local; |
75636525 | 1142 | sdata->dev = ndev; |
68542962 JO |
1143 | #ifdef CONFIG_INET |
1144 | sdata->arp_filter_state = true; | |
1145 | #endif | |
75636525 JB |
1146 | |
1147 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
1148 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
1149 | ||
1150 | INIT_LIST_HEAD(&sdata->key_list); | |
1151 | ||
37eb0b16 JM |
1152 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
1153 | struct ieee80211_supported_band *sband; | |
1154 | sband = local->hw.wiphy->bands[i]; | |
1155 | sdata->rc_rateidx_mask[i] = | |
1156 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
1157 | } | |
75636525 JB |
1158 | |
1159 | /* setup type-dependent data */ | |
1160 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 1161 | |
9bc383de JB |
1162 | if (params) { |
1163 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1164 | if (type == NL80211_IFTYPE_STATION) | |
1165 | sdata->u.mgd.use_4addr = params->use_4addr; | |
1166 | } | |
1167 | ||
f0706e82 JB |
1168 | ret = register_netdevice(ndev); |
1169 | if (ret) | |
1170 | goto fail; | |
1171 | ||
902acc78 JB |
1172 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1173 | params && params->mesh_id_len) | |
472dbc45 JB |
1174 | ieee80211_sdata_set_mesh_id(sdata, |
1175 | params->mesh_id_len, | |
1176 | params->mesh_id); | |
ee385855 | 1177 | |
c771c9d8 | 1178 | mutex_lock(&local->iflist_mtx); |
79010420 | 1179 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1180 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1181 | |
f0706e82 JB |
1182 | if (new_dev) |
1183 | *new_dev = ndev; | |
f0706e82 | 1184 | |
f0706e82 JB |
1185 | return 0; |
1186 | ||
75636525 | 1187 | fail: |
f0706e82 JB |
1188 | free_netdev(ndev); |
1189 | return ret; | |
1190 | } | |
1191 | ||
f698d856 | 1192 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1193 | { |
f0706e82 | 1194 | ASSERT_RTNL(); |
11a843b7 | 1195 | |
c771c9d8 | 1196 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1197 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1198 | mutex_unlock(&sdata->local->iflist_mtx); |
1199 | ||
75636525 | 1200 | synchronize_rcu(); |
f698d856 | 1201 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
1202 | } |
1203 | ||
75636525 JB |
1204 | /* |
1205 | * Remove all interfaces, may only be called at hardware unregistration | |
1206 | * time because it doesn't do RCU-safe list removals. | |
1207 | */ | |
1208 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1209 | { |
75636525 | 1210 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1211 | LIST_HEAD(unreg_list); |
f0706e82 JB |
1212 | |
1213 | ASSERT_RTNL(); | |
1214 | ||
efe117ab | 1215 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1216 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1217 | list_del(&sdata->list); | |
c771c9d8 | 1218 | |
efe117ab | 1219 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
f0706e82 | 1220 | } |
efe117ab ED |
1221 | mutex_unlock(&local->iflist_mtx); |
1222 | unregister_netdevice_many(&unreg_list); | |
f0706e82 | 1223 | } |
5cff20e6 JB |
1224 | |
1225 | static u32 ieee80211_idle_off(struct ieee80211_local *local, | |
1226 | const char *reason) | |
1227 | { | |
1228 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
1229 | return 0; | |
1230 | ||
1231 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 1232 | wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); |
5cff20e6 JB |
1233 | #endif |
1234 | ||
1235 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
1236 | return IEEE80211_CONF_CHANGE_IDLE; | |
1237 | } | |
1238 | ||
1239 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
1240 | { | |
1241 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
1242 | return 0; | |
1243 | ||
1244 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 1245 | wiphy_debug(local->hw.wiphy, "device now idle\n"); |
5cff20e6 JB |
1246 | #endif |
1247 | ||
a80f7c0b JB |
1248 | drv_flush(local, false); |
1249 | ||
5cff20e6 JB |
1250 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
1251 | return IEEE80211_CONF_CHANGE_IDLE; | |
1252 | } | |
1253 | ||
1254 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
1255 | { | |
1256 | struct ieee80211_sub_if_data *sdata; | |
1257 | int count = 0; | |
7da7cc1d JB |
1258 | bool working = false, scanning = false; |
1259 | struct ieee80211_work *wk; | |
5cff20e6 | 1260 | |
7da7cc1d JB |
1261 | #ifdef CONFIG_PROVE_LOCKING |
1262 | WARN_ON(debug_locks && !lockdep_rtnl_is_held() && | |
1263 | !lockdep_is_held(&local->iflist_mtx)); | |
1264 | #endif | |
1265 | lockdep_assert_held(&local->mtx); | |
5cff20e6 JB |
1266 | |
1267 | list_for_each_entry(sdata, &local->interfaces, list) { | |
7da7cc1d JB |
1268 | if (!ieee80211_sdata_running(sdata)) { |
1269 | sdata->vif.bss_conf.idle = true; | |
5cff20e6 | 1270 | continue; |
7da7cc1d JB |
1271 | } |
1272 | ||
1273 | sdata->old_idle = sdata->vif.bss_conf.idle; | |
1274 | ||
5cff20e6 JB |
1275 | /* do not count disabled managed interfaces */ |
1276 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
7da7cc1d JB |
1277 | !sdata->u.mgd.associated) { |
1278 | sdata->vif.bss_conf.idle = true; | |
5cff20e6 | 1279 | continue; |
7da7cc1d | 1280 | } |
5cff20e6 JB |
1281 | /* do not count unused IBSS interfaces */ |
1282 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
7da7cc1d JB |
1283 | !sdata->u.ibss.ssid_len) { |
1284 | sdata->vif.bss_conf.idle = true; | |
5cff20e6 | 1285 | continue; |
7da7cc1d | 1286 | } |
5cff20e6 JB |
1287 | /* count everything else */ |
1288 | count++; | |
1289 | } | |
1290 | ||
7da7cc1d JB |
1291 | list_for_each_entry(wk, &local->work_list, list) { |
1292 | working = true; | |
1293 | wk->sdata->vif.bss_conf.idle = false; | |
1294 | } | |
1295 | ||
1296 | if (local->scan_sdata) { | |
1297 | scanning = true; | |
1298 | local->scan_sdata->vif.bss_conf.idle = false; | |
1299 | } | |
1300 | ||
1301 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1302 | if (sdata->old_idle == sdata->vif.bss_conf.idle) | |
1303 | continue; | |
1304 | if (!ieee80211_sdata_running(sdata)) | |
1305 | continue; | |
1306 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); | |
1307 | } | |
1308 | ||
1309 | if (working) | |
1310 | return ieee80211_idle_off(local, "working"); | |
1311 | if (scanning) | |
1312 | return ieee80211_idle_off(local, "scanning"); | |
5cff20e6 JB |
1313 | if (!count) |
1314 | return ieee80211_idle_on(local); | |
1315 | else | |
1316 | return ieee80211_idle_off(local, "in use"); | |
1317 | ||
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
1322 | { | |
1323 | u32 chg; | |
1324 | ||
1325 | mutex_lock(&local->iflist_mtx); | |
1326 | chg = __ieee80211_recalc_idle(local); | |
1327 | mutex_unlock(&local->iflist_mtx); | |
58905ca5 JB |
1328 | if (chg) |
1329 | ieee80211_hw_config(local, chg); | |
5cff20e6 | 1330 | } |
47846c9b JB |
1331 | |
1332 | static int netdev_notify(struct notifier_block *nb, | |
1333 | unsigned long state, | |
1334 | void *ndev) | |
1335 | { | |
1336 | struct net_device *dev = ndev; | |
1337 | struct ieee80211_sub_if_data *sdata; | |
1338 | ||
1339 | if (state != NETDEV_CHANGENAME) | |
1340 | return 0; | |
1341 | ||
1342 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1343 | return 0; | |
1344 | ||
1345 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1346 | return 0; | |
1347 | ||
1348 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1349 | ||
2f5265e6 | 1350 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1351 | |
1352 | ieee80211_debugfs_rename_netdev(sdata); | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | static struct notifier_block mac80211_netdev_notifier = { | |
1357 | .notifier_call = netdev_notify, | |
1358 | }; | |
1359 | ||
1360 | int ieee80211_iface_init(void) | |
1361 | { | |
1362 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1363 | } | |
1364 | ||
1365 | void ieee80211_iface_exit(void) | |
1366 | { | |
1367 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1368 | } |