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Commit | Line | Data |
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f0706e82 | 1 | /* |
0d143fe1 JB |
2 | * Interface handling (except master interface) |
3 | * | |
f0706e82 JB |
4 | * Copyright 2002-2005, Instant802 Networks, Inc. |
5 | * Copyright 2005-2006, Devicescape Software, Inc. | |
6 | * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> | |
75636525 | 7 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
f0706e82 JB |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
f0706e82 JB |
14 | #include <linux/kernel.h> |
15 | #include <linux/if_arp.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/rtnetlink.h> | |
18 | #include <net/mac80211.h> | |
cf0277e7 | 19 | #include <net/ieee80211_radiotap.h> |
f0706e82 JB |
20 | #include "ieee80211_i.h" |
21 | #include "sta_info.h" | |
e9f207f0 | 22 | #include "debugfs_netdev.h" |
ee385855 | 23 | #include "mesh.h" |
0d143fe1 | 24 | #include "led.h" |
24487981 | 25 | #include "driver-ops.h" |
cf0277e7 | 26 | #include "wme.h" |
0d143fe1 | 27 | |
c771c9d8 JB |
28 | /** |
29 | * DOC: Interface list locking | |
30 | * | |
31 | * The interface list in each struct ieee80211_local is protected | |
32 | * three-fold: | |
33 | * | |
34 | * (1) modifications may only be done under the RTNL | |
35 | * (2) modifications and readers are protected against each other by | |
36 | * the iflist_mtx. | |
37 | * (3) modifications are done in an RCU manner so atomic readers | |
38 | * can traverse the list in RCU-safe blocks. | |
39 | * | |
40 | * As a consequence, reads (traversals) of the list can be protected | |
41 | * by either the RTNL, the iflist_mtx or RCU. | |
42 | */ | |
43 | ||
44 | ||
0d143fe1 JB |
45 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
46 | { | |
47 | int meshhdrlen; | |
48 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
49 | ||
50 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
51 | ||
52 | /* FIX: what would be proper limits for MTU? | |
53 | * This interface uses 802.3 frames. */ | |
54 | if (new_mtu < 256 || | |
55 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
56 | return -EINVAL; | |
57 | } | |
58 | ||
59 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
60 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
61 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
62 | dev->mtu = new_mtu; | |
63 | return 0; | |
64 | } | |
65 | ||
47846c9b JB |
66 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
67 | { | |
68 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
fc5f7577 | 69 | struct sockaddr *sa = addr; |
47846c9b JB |
70 | int ret; |
71 | ||
9607e6b6 | 72 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
73 | return -EBUSY; |
74 | ||
fc5f7577 | 75 | ret = eth_mac_addr(dev, sa); |
47846c9b JB |
76 | |
77 | if (ret == 0) | |
fc5f7577 | 78 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
47846c9b JB |
79 | |
80 | return ret; | |
81 | } | |
82 | ||
0d143fe1 JB |
83 | static inline int identical_mac_addr_allowed(int type1, int type2) |
84 | { | |
85 | return type1 == NL80211_IFTYPE_MONITOR || | |
86 | type2 == NL80211_IFTYPE_MONITOR || | |
87 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || | |
88 | (type1 == NL80211_IFTYPE_WDS && | |
89 | (type2 == NL80211_IFTYPE_WDS || | |
90 | type2 == NL80211_IFTYPE_AP)) || | |
91 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
92 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
93 | (type2 == NL80211_IFTYPE_AP || | |
94 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
95 | } | |
96 | ||
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 | ||
85416a4f CL |
151 | void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, |
152 | const int offset) | |
153 | { | |
154 | struct ieee80211_local *local = sdata->local; | |
155 | u32 flags = sdata->u.mntr_flags; | |
156 | ||
157 | #define ADJUST(_f, _s) do { \ | |
158 | if (flags & MONITOR_FLAG_##_f) \ | |
159 | local->fif_##_s += offset; \ | |
160 | } while (0) | |
161 | ||
162 | ADJUST(FCSFAIL, fcsfail); | |
163 | ADJUST(PLCPFAIL, plcpfail); | |
164 | ADJUST(CONTROL, control); | |
165 | ADJUST(CONTROL, pspoll); | |
166 | ADJUST(OTHER_BSS, other_bss); | |
167 | ||
168 | #undef ADJUST | |
169 | } | |
170 | ||
34d4bc4d JB |
171 | /* |
172 | * NOTE: Be very careful when changing this function, it must NOT return | |
173 | * an error on interface type changes that have been pre-checked, so most | |
174 | * checks should be in ieee80211_check_concurrent_iface. | |
175 | */ | |
176 | static int ieee80211_do_open(struct net_device *dev, bool coming_up) | |
87490f6d JB |
177 | { |
178 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
179 | struct ieee80211_local *local = sdata->local; | |
180 | struct sta_info *sta; | |
181 | u32 changed = 0; | |
182 | int res; | |
183 | u32 hw_reconf_flags = 0; | |
184 | ||
0d143fe1 JB |
185 | switch (sdata->vif.type) { |
186 | case NL80211_IFTYPE_WDS: | |
187 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
188 | return -ENOLINK; | |
189 | break; | |
190 | case NL80211_IFTYPE_AP_VLAN: | |
191 | if (!sdata->bss) | |
192 | return -ENOLINK; | |
193 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); | |
194 | break; | |
195 | case NL80211_IFTYPE_AP: | |
196 | sdata->bss = &sdata->u.ap; | |
197 | break; | |
198 | case NL80211_IFTYPE_MESH_POINT: | |
199 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
200 | break; | |
201 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
202 | atomic_inc(&local->iff_allmultis); | |
203 | break; | |
204 | case NL80211_IFTYPE_STATION: | |
205 | case NL80211_IFTYPE_MONITOR: | |
206 | case NL80211_IFTYPE_ADHOC: | |
207 | /* no special treatment */ | |
208 | break; | |
209 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 210 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
211 | case NL80211_IFTYPE_P2P_CLIENT: |
212 | case NL80211_IFTYPE_P2P_GO: | |
0d143fe1 JB |
213 | /* cannot happen */ |
214 | WARN_ON(1); | |
215 | break; | |
216 | } | |
217 | ||
218 | if (local->open_count == 0) { | |
24487981 | 219 | res = drv_start(local); |
0d143fe1 JB |
220 | if (res) |
221 | goto err_del_bss; | |
4e6cbfd0 JL |
222 | if (local->ops->napi_poll) |
223 | napi_enable(&local->napi); | |
e8975581 JB |
224 | /* we're brought up, everything changes */ |
225 | hw_reconf_flags = ~0; | |
1f87f7d3 | 226 | ieee80211_led_radio(local, true); |
0d143fe1 JB |
227 | } |
228 | ||
229 | /* | |
bf533e0b JB |
230 | * Copy the hopefully now-present MAC address to |
231 | * this interface, if it has the special null one. | |
0d143fe1 | 232 | */ |
bf533e0b JB |
233 | if (is_zero_ether_addr(dev->dev_addr)) { |
234 | memcpy(dev->dev_addr, | |
235 | local->hw.wiphy->perm_addr, | |
236 | ETH_ALEN); | |
237 | memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); | |
238 | ||
239 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
240 | if (!local->open_count) | |
241 | drv_stop(local); | |
242 | return -EADDRNOTAVAIL; | |
0adc23f5 | 243 | } |
0d143fe1 JB |
244 | } |
245 | ||
0d143fe1 JB |
246 | switch (sdata->vif.type) { |
247 | case NL80211_IFTYPE_AP_VLAN: | |
248 | /* no need to tell driver */ | |
249 | break; | |
250 | case NL80211_IFTYPE_MONITOR: | |
251 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
252 | local->cooked_mntrs++; | |
253 | break; | |
254 | } | |
255 | ||
256 | /* must be before the call to ieee80211_configure_filter */ | |
257 | local->monitors++; | |
e8975581 | 258 | if (local->monitors == 1) { |
0869aea0 JB |
259 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
260 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 261 | } |
0d143fe1 | 262 | |
85416a4f | 263 | ieee80211_adjust_monitor_flags(sdata, 1); |
0d143fe1 | 264 | ieee80211_configure_filter(local); |
53e9b1de DG |
265 | |
266 | netif_carrier_on(dev); | |
0d143fe1 | 267 | break; |
0d143fe1 | 268 | default: |
34d4bc4d JB |
269 | if (coming_up) { |
270 | res = drv_add_interface(local, &sdata->vif); | |
271 | if (res) | |
272 | goto err_stop; | |
273 | } | |
0d143fe1 | 274 | |
a3c9aa51 AY |
275 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
276 | local->fif_other_bss++; | |
a3c9aa51 | 277 | ieee80211_configure_filter(local); |
a3c9aa51 | 278 | |
0d143fe1 | 279 | ieee80211_start_mesh(sdata); |
e3b90ca2 IP |
280 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
281 | local->fif_pspoll++; | |
282 | ||
e3b90ca2 | 283 | ieee80211_configure_filter(local); |
a3c9aa51 | 284 | } |
e3b90ca2 | 285 | |
0d143fe1 JB |
286 | changed |= ieee80211_reset_erp_info(sdata); |
287 | ieee80211_bss_info_change_notify(sdata, changed); | |
0d143fe1 | 288 | |
7986cf95 | 289 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
0d143fe1 JB |
290 | netif_carrier_off(dev); |
291 | else | |
292 | netif_carrier_on(dev); | |
293 | } | |
294 | ||
2d2080c3 JB |
295 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
296 | ||
0d143fe1 JB |
297 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
298 | /* Create STA entry for the WDS peer */ | |
299 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
300 | GFP_KERNEL); | |
301 | if (!sta) { | |
302 | res = -ENOMEM; | |
303 | goto err_del_interface; | |
304 | } | |
305 | ||
306 | /* no locking required since STA is not live yet */ | |
307 | sta->flags |= WLAN_STA_AUTHORIZED; | |
308 | ||
309 | res = sta_info_insert(sta); | |
310 | if (res) { | |
311 | /* STA has been freed */ | |
312 | goto err_del_interface; | |
313 | } | |
314 | } | |
315 | ||
0d143fe1 JB |
316 | /* |
317 | * set_multicast_list will be invoked by the networking core | |
318 | * which will check whether any increments here were done in | |
319 | * error and sync them down to the hardware as filter flags. | |
320 | */ | |
321 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
322 | atomic_inc(&local->iff_allmultis); | |
323 | ||
324 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
325 | atomic_inc(&local->iff_promiscs); | |
326 | ||
7da7cc1d | 327 | mutex_lock(&local->mtx); |
5cff20e6 | 328 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
7da7cc1d | 329 | mutex_unlock(&local->mtx); |
5cff20e6 | 330 | |
34d4bc4d JB |
331 | if (coming_up) |
332 | local->open_count++; | |
333 | ||
e8975581 JB |
334 | if (hw_reconf_flags) { |
335 | ieee80211_hw_config(local, hw_reconf_flags); | |
0d143fe1 JB |
336 | /* |
337 | * set default queue parameters so drivers don't | |
338 | * need to initialise the hardware if the hardware | |
339 | * doesn't start up with sane defaults | |
340 | */ | |
341 | ieee80211_set_wmm_default(sdata); | |
342 | } | |
343 | ||
10f644a4 | 344 | ieee80211_recalc_ps(local, -1); |
965bedad | 345 | |
8a5b33f5 | 346 | netif_tx_start_all_queues(dev); |
0d143fe1 JB |
347 | |
348 | return 0; | |
349 | err_del_interface: | |
1ed32e4f | 350 | drv_remove_interface(local, &sdata->vif); |
0d143fe1 | 351 | err_stop: |
24487981 JB |
352 | if (!local->open_count) |
353 | drv_stop(local); | |
0d143fe1 JB |
354 | err_del_bss: |
355 | sdata->bss = NULL; | |
356 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
357 | list_del(&sdata->u.vlan.list); | |
2d2080c3 | 358 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
0d143fe1 JB |
359 | return res; |
360 | } | |
361 | ||
34d4bc4d | 362 | static int ieee80211_open(struct net_device *dev) |
0d143fe1 JB |
363 | { |
364 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
34d4bc4d JB |
365 | int err; |
366 | ||
367 | /* fail early if user set an invalid address */ | |
368 | if (!is_zero_ether_addr(dev->dev_addr) && | |
369 | !is_valid_ether_addr(dev->dev_addr)) | |
370 | return -EADDRNOTAVAIL; | |
371 | ||
372 | err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); | |
373 | if (err) | |
374 | return err; | |
375 | ||
376 | return ieee80211_do_open(dev, true); | |
377 | } | |
378 | ||
379 | static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, | |
380 | bool going_down) | |
381 | { | |
0d143fe1 | 382 | struct ieee80211_local *local = sdata->local; |
5061b0c2 JB |
383 | unsigned long flags; |
384 | struct sk_buff *skb, *tmp; | |
e8975581 | 385 | u32 hw_reconf_flags = 0; |
5061b0c2 | 386 | int i; |
0d143fe1 | 387 | |
34d4bc4d JB |
388 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
389 | ||
0d143fe1 JB |
390 | /* |
391 | * Stop TX on this interface first. | |
392 | */ | |
34d4bc4d | 393 | netif_tx_stop_all_queues(sdata->dev); |
0d143fe1 | 394 | |
af6b6374 JB |
395 | /* |
396 | * Purge work for this interface. | |
397 | */ | |
398 | ieee80211_work_purge(sdata); | |
399 | ||
0d143fe1 JB |
400 | /* |
401 | * Remove all stations associated with this interface. | |
402 | * | |
403 | * This must be done before calling ops->remove_interface() | |
404 | * because otherwise we can later invoke ops->sta_notify() | |
405 | * whenever the STAs are removed, and that invalidates driver | |
406 | * assumptions about always getting a vif pointer that is valid | |
407 | * (because if we remove a STA after ops->remove_interface() | |
408 | * the driver will have removed the vif info already!) | |
409 | * | |
b9dcf712 JB |
410 | * This is relevant only in AP, WDS and mesh modes, since in |
411 | * all other modes we've already removed all stations when | |
412 | * disconnecting etc. | |
0d143fe1 JB |
413 | */ |
414 | sta_info_flush(local, sdata); | |
415 | ||
416 | /* | |
417 | * Don't count this interface for promisc/allmulti while it | |
418 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
419 | * on the master interface which will sync these down to the | |
420 | * hardware as filter flags. | |
421 | */ | |
422 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
423 | atomic_dec(&local->iff_allmultis); | |
424 | ||
425 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
426 | atomic_dec(&local->iff_promiscs); | |
427 | ||
e3b90ca2 IP |
428 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
429 | local->fif_pspoll--; | |
430 | ||
34d4bc4d | 431 | netif_addr_lock_bh(sdata->dev); |
3b8d81e0 | 432 | spin_lock_bh(&local->filter_lock); |
34d4bc4d JB |
433 | __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, |
434 | sdata->dev->addr_len); | |
3b8d81e0 | 435 | spin_unlock_bh(&local->filter_lock); |
34d4bc4d | 436 | netif_addr_unlock_bh(sdata->dev); |
3b8d81e0 | 437 | |
3ac64bee JB |
438 | ieee80211_configure_filter(local); |
439 | ||
7cbf0ba5 VN |
440 | del_timer_sync(&local->dynamic_ps_timer); |
441 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 JB |
442 | |
443 | /* APs need special treatment */ | |
444 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 445 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
446 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
447 | ||
b9dcf712 JB |
448 | /* sdata_running will return false, so this will disable */ |
449 | ieee80211_bss_info_change_notify(sdata, | |
450 | BSS_CHANGED_BEACON_ENABLED); | |
451 | ||
0d143fe1 JB |
452 | /* remove beacon */ |
453 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
454 | synchronize_rcu(); | |
455 | kfree(old_beacon); | |
456 | ||
b9dcf712 JB |
457 | /* free all potentially still buffered bcast frames */ |
458 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { | |
459 | local->total_ps_buffered--; | |
460 | dev_kfree_skb(skb); | |
461 | } | |
462 | ||
0d143fe1 | 463 | /* down all dependent devices, that is VLANs */ |
57c9fff3 | 464 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
465 | u.vlan.list) |
466 | dev_close(vlan->dev); | |
467 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
468 | } | |
469 | ||
34d4bc4d JB |
470 | if (going_down) |
471 | local->open_count--; | |
0d143fe1 JB |
472 | |
473 | switch (sdata->vif.type) { | |
474 | case NL80211_IFTYPE_AP_VLAN: | |
475 | list_del(&sdata->u.vlan.list); | |
476 | /* no need to tell driver */ | |
477 | break; | |
478 | case NL80211_IFTYPE_MONITOR: | |
479 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
480 | local->cooked_mntrs--; | |
481 | break; | |
482 | } | |
483 | ||
484 | local->monitors--; | |
e8975581 | 485 | if (local->monitors == 0) { |
0869aea0 JB |
486 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
487 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 488 | } |
0d143fe1 | 489 | |
85416a4f | 490 | ieee80211_adjust_monitor_flags(sdata, -1); |
0d143fe1 | 491 | ieee80211_configure_filter(local); |
0d143fe1 | 492 | break; |
0d143fe1 JB |
493 | case NL80211_IFTYPE_MESH_POINT: |
494 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
495 | /* other_bss and allmulti are always set on mesh |
496 | * ifaces */ | |
497 | local->fif_other_bss--; | |
0d143fe1 | 498 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 | 499 | |
a3c9aa51 | 500 | ieee80211_configure_filter(local); |
a3c9aa51 | 501 | |
0d143fe1 JB |
502 | ieee80211_stop_mesh(sdata); |
503 | } | |
504 | /* fall through */ | |
505 | default: | |
c1475ca9 | 506 | flush_work(&sdata->work); |
35f20c14 JB |
507 | /* |
508 | * When we get here, the interface is marked down. | |
509 | * Call synchronize_rcu() to wait for the RX path | |
510 | * should it be using the interface and enqueuing | |
511 | * frames at this very time on another CPU. | |
512 | */ | |
513 | synchronize_rcu(); | |
514 | skb_queue_purge(&sdata->skb_queue); | |
515 | ||
15db0b7f JB |
516 | if (local->scan_sdata == sdata) |
517 | ieee80211_scan_cancel(local); | |
0d143fe1 | 518 | |
97af7432 | 519 | /* |
b9dcf712 JB |
520 | * Disable beaconing here for mesh only, AP and IBSS |
521 | * are already taken care of. | |
97af7432 | 522 | */ |
b9dcf712 | 523 | if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
97af7432 BC |
524 | ieee80211_bss_info_change_notify(sdata, |
525 | BSS_CHANGED_BEACON_ENABLED); | |
97af7432 | 526 | |
b9dcf712 JB |
527 | /* |
528 | * Free all remaining keys, there shouldn't be any, | |
529 | * except maybe group keys in AP more or WDS? | |
530 | */ | |
ad0e2b5a | 531 | ieee80211_free_keys(sdata); |
b9dcf712 | 532 | |
34d4bc4d JB |
533 | if (going_down) |
534 | drv_remove_interface(local, &sdata->vif); | |
0d143fe1 JB |
535 | } |
536 | ||
537 | sdata->bss = NULL; | |
538 | ||
7da7cc1d | 539 | mutex_lock(&local->mtx); |
5cff20e6 | 540 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
7da7cc1d | 541 | mutex_unlock(&local->mtx); |
5cff20e6 JB |
542 | |
543 | ieee80211_recalc_ps(local, -1); | |
544 | ||
0d143fe1 | 545 | if (local->open_count == 0) { |
4e6cbfd0 JL |
546 | if (local->ops->napi_poll) |
547 | napi_disable(&local->napi); | |
ea77f12f | 548 | ieee80211_clear_tx_pending(local); |
84f6a01c | 549 | ieee80211_stop_device(local); |
0d143fe1 | 550 | |
e8975581 JB |
551 | /* no reconfiguring after stop! */ |
552 | hw_reconf_flags = 0; | |
0d143fe1 JB |
553 | } |
554 | ||
e8975581 JB |
555 | /* do after stop to avoid reconfiguring when we stop anyway */ |
556 | if (hw_reconf_flags) | |
557 | ieee80211_hw_config(local, hw_reconf_flags); | |
558 | ||
5061b0c2 JB |
559 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
560 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
561 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
562 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
563 | if (info->control.vif == &sdata->vif) { | |
564 | __skb_unlink(skb, &local->pending[i]); | |
565 | dev_kfree_skb_irq(skb); | |
566 | } | |
567 | } | |
568 | } | |
569 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
34d4bc4d JB |
570 | } |
571 | ||
572 | static int ieee80211_stop(struct net_device *dev) | |
573 | { | |
574 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
575 | ||
576 | ieee80211_do_stop(sdata, true); | |
5061b0c2 | 577 | |
0d143fe1 JB |
578 | return 0; |
579 | } | |
580 | ||
581 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
582 | { | |
0d143fe1 | 583 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 584 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
585 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
586 | ||
587 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
588 | promisc = !!(dev->flags & IFF_PROMISC); | |
589 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
590 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
591 | ||
592 | if (allmulti != sdata_allmulti) { | |
593 | if (dev->flags & IFF_ALLMULTI) | |
594 | atomic_inc(&local->iff_allmultis); | |
595 | else | |
596 | atomic_dec(&local->iff_allmultis); | |
597 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
598 | } | |
599 | ||
600 | if (promisc != sdata_promisc) { | |
601 | if (dev->flags & IFF_PROMISC) | |
602 | atomic_inc(&local->iff_promiscs); | |
603 | else | |
604 | atomic_dec(&local->iff_promiscs); | |
605 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
606 | } | |
3b8d81e0 | 607 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 608 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 609 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 610 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
611 | } |
612 | ||
75636525 JB |
613 | /* |
614 | * Called when the netdev is removed or, by the code below, before | |
615 | * the interface type changes. | |
616 | */ | |
617 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 618 | { |
75636525 JB |
619 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
620 | struct ieee80211_local *local = sdata->local; | |
75636525 | 621 | int flushed; |
f0706e82 JB |
622 | int i; |
623 | ||
75636525 JB |
624 | /* free extra data */ |
625 | ieee80211_free_keys(sdata); | |
626 | ||
aee14ceb JM |
627 | ieee80211_debugfs_remove_netdev(sdata); |
628 | ||
f0706e82 | 629 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
630 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
631 | sdata->fragment_next = 0; | |
11a843b7 | 632 | |
b9dcf712 JB |
633 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
634 | mesh_rmc_free(sdata); | |
75636525 JB |
635 | |
636 | flushed = sta_info_flush(local, sdata); | |
637 | WARN_ON(flushed); | |
f0706e82 JB |
638 | } |
639 | ||
cf0277e7 JB |
640 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
641 | struct sk_buff *skb) | |
642 | { | |
643 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
644 | } | |
645 | ||
587e729e JB |
646 | static const struct net_device_ops ieee80211_dataif_ops = { |
647 | .ndo_open = ieee80211_open, | |
648 | .ndo_stop = ieee80211_stop, | |
649 | .ndo_uninit = ieee80211_teardown_sdata, | |
650 | .ndo_start_xmit = ieee80211_subif_start_xmit, | |
651 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
652 | .ndo_change_mtu = ieee80211_change_mtu, | |
47846c9b | 653 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 654 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
655 | }; |
656 | ||
cf0277e7 JB |
657 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
658 | struct sk_buff *skb) | |
659 | { | |
660 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
661 | struct ieee80211_local *local = sdata->local; | |
662 | struct ieee80211_hdr *hdr; | |
663 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
193e70ef | 664 | u8 *p; |
cf0277e7 JB |
665 | |
666 | if (local->hw.queues < 4) | |
667 | return 0; | |
668 | ||
669 | if (skb->len < 4 || | |
b49bb574 | 670 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
671 | return 0; /* doesn't matter, frame will be dropped */ |
672 | ||
b49bb574 | 673 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 674 | |
861a57cd | 675 | if (!ieee80211_is_data(hdr->frame_control)) { |
cf0277e7 JB |
676 | skb->priority = 7; |
677 | return ieee802_1d_to_ac[skb->priority]; | |
678 | } | |
861a57cd FF |
679 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
680 | skb->priority = 0; | |
681 | return ieee802_1d_to_ac[skb->priority]; | |
682 | } | |
cf0277e7 | 683 | |
193e70ef FF |
684 | p = ieee80211_get_qos_ctl(hdr); |
685 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
686 | ||
cf0277e7 JB |
687 | return ieee80211_downgrade_queue(local, skb); |
688 | } | |
689 | ||
587e729e JB |
690 | static const struct net_device_ops ieee80211_monitorif_ops = { |
691 | .ndo_open = ieee80211_open, | |
692 | .ndo_stop = ieee80211_stop, | |
693 | .ndo_uninit = ieee80211_teardown_sdata, | |
694 | .ndo_start_xmit = ieee80211_monitor_start_xmit, | |
695 | .ndo_set_multicast_list = ieee80211_set_multicast_list, | |
696 | .ndo_change_mtu = ieee80211_change_mtu, | |
697 | .ndo_set_mac_address = eth_mac_addr, | |
cf0277e7 | 698 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
699 | }; |
700 | ||
701 | static void ieee80211_if_setup(struct net_device *dev) | |
702 | { | |
703 | ether_setup(dev); | |
704 | dev->netdev_ops = &ieee80211_dataif_ops; | |
587e729e JB |
705 | dev->destructor = free_netdev; |
706 | } | |
707 | ||
1fa57d01 JB |
708 | static void ieee80211_iface_work(struct work_struct *work) |
709 | { | |
710 | struct ieee80211_sub_if_data *sdata = | |
711 | container_of(work, struct ieee80211_sub_if_data, work); | |
712 | struct ieee80211_local *local = sdata->local; | |
713 | struct sk_buff *skb; | |
344eec67 | 714 | struct sta_info *sta; |
c1475ca9 | 715 | struct ieee80211_ra_tid *ra_tid; |
1fa57d01 JB |
716 | |
717 | if (!ieee80211_sdata_running(sdata)) | |
718 | return; | |
719 | ||
720 | if (local->scanning) | |
721 | return; | |
722 | ||
723 | /* | |
724 | * ieee80211_queue_work() should have picked up most cases, | |
725 | * here we'll pick the rest. | |
726 | */ | |
727 | if (WARN(local->suspended, | |
728 | "interface work scheduled while going to suspend\n")) | |
729 | return; | |
730 | ||
731 | /* first process frames */ | |
732 | while ((skb = skb_dequeue(&sdata->skb_queue))) { | |
bed7ee6e JB |
733 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
734 | ||
c1475ca9 JB |
735 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
736 | ra_tid = (void *)&skb->cb; | |
737 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
738 | ra_tid->tid); | |
739 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { | |
740 | ra_tid = (void *)&skb->cb; | |
741 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
742 | ra_tid->tid); | |
743 | } else if (ieee80211_is_action(mgmt->frame_control) && | |
744 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { | |
bed7ee6e | 745 | int len = skb->len; |
bed7ee6e | 746 | |
a93e3644 | 747 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 748 | sta = sta_info_get_bss(sdata, mgmt->sa); |
bed7ee6e JB |
749 | if (sta) { |
750 | switch (mgmt->u.action.u.addba_req.action_code) { | |
751 | case WLAN_ACTION_ADDBA_REQ: | |
752 | ieee80211_process_addba_request( | |
753 | local, sta, mgmt, len); | |
754 | break; | |
755 | case WLAN_ACTION_ADDBA_RESP: | |
756 | ieee80211_process_addba_resp(local, sta, | |
757 | mgmt, len); | |
758 | break; | |
759 | case WLAN_ACTION_DELBA: | |
760 | ieee80211_process_delba(sdata, sta, | |
761 | mgmt, len); | |
762 | break; | |
763 | default: | |
764 | WARN_ON(1); | |
765 | break; | |
766 | } | |
767 | } | |
a93e3644 | 768 | mutex_unlock(&local->sta_mtx); |
344eec67 JB |
769 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
770 | struct ieee80211_hdr *hdr = (void *)mgmt; | |
771 | /* | |
772 | * So the frame isn't mgmt, but frame_control | |
773 | * is at the right place anyway, of course, so | |
774 | * the if statement is correct. | |
775 | * | |
776 | * Warn if we have other data frame types here, | |
777 | * they must not get here. | |
778 | */ | |
779 | WARN_ON(hdr->frame_control & | |
780 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); | |
781 | WARN_ON(!(hdr->seq_ctrl & | |
782 | cpu_to_le16(IEEE80211_SCTL_FRAG))); | |
783 | /* | |
784 | * This was a fragment of a frame, received while | |
785 | * a block-ack session was active. That cannot be | |
786 | * right, so terminate the session. | |
787 | */ | |
a93e3644 | 788 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 789 | sta = sta_info_get_bss(sdata, mgmt->sa); |
344eec67 JB |
790 | if (sta) { |
791 | u16 tid = *ieee80211_get_qos_ctl(hdr) & | |
792 | IEEE80211_QOS_CTL_TID_MASK; | |
793 | ||
794 | __ieee80211_stop_rx_ba_session( | |
795 | sta, tid, WLAN_BACK_RECIPIENT, | |
796 | WLAN_REASON_QSTA_REQUIRE_SETUP); | |
797 | } | |
a93e3644 | 798 | mutex_unlock(&local->sta_mtx); |
bed7ee6e | 799 | } else switch (sdata->vif.type) { |
1fa57d01 JB |
800 | case NL80211_IFTYPE_STATION: |
801 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
802 | break; | |
803 | case NL80211_IFTYPE_ADHOC: | |
804 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
805 | break; | |
806 | case NL80211_IFTYPE_MESH_POINT: | |
807 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
808 | break; | |
809 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
810 | break; | |
811 | default: | |
812 | WARN(1, "frame for unexpected interface type"); | |
1fa57d01 JB |
813 | break; |
814 | } | |
36b3a628 JB |
815 | |
816 | kfree_skb(skb); | |
1fa57d01 JB |
817 | } |
818 | ||
819 | /* then other type-dependent work */ | |
820 | switch (sdata->vif.type) { | |
821 | case NL80211_IFTYPE_STATION: | |
822 | ieee80211_sta_work(sdata); | |
823 | break; | |
824 | case NL80211_IFTYPE_ADHOC: | |
825 | ieee80211_ibss_work(sdata); | |
826 | break; | |
827 | case NL80211_IFTYPE_MESH_POINT: | |
828 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
829 | break; | |
830 | ieee80211_mesh_work(sdata); | |
831 | break; | |
832 | default: | |
833 | break; | |
834 | } | |
835 | } | |
836 | ||
837 | ||
75636525 JB |
838 | /* |
839 | * Helper function to initialise an interface to a specific type. | |
840 | */ | |
841 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 842 | enum nl80211_iftype type) |
f0706e82 | 843 | { |
75636525 JB |
844 | /* clear type-dependent union */ |
845 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
846 | ||
847 | /* and set some type-dependent values */ | |
848 | sdata->vif.type = type; | |
2ca27bcf | 849 | sdata->vif.p2p = false; |
587e729e | 850 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
60719ffd | 851 | sdata->wdev.iftype = type; |
75636525 | 852 | |
a621fa4d JB |
853 | sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
854 | sdata->control_port_no_encrypt = false; | |
855 | ||
75636525 JB |
856 | /* only monitor differs */ |
857 | sdata->dev->type = ARPHRD_ETHER; | |
858 | ||
35f20c14 | 859 | skb_queue_head_init(&sdata->skb_queue); |
1fa57d01 | 860 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
35f20c14 | 861 | |
75636525 | 862 | switch (type) { |
2ca27bcf JB |
863 | case NL80211_IFTYPE_P2P_GO: |
864 | type = NL80211_IFTYPE_AP; | |
865 | sdata->vif.type = type; | |
866 | sdata->vif.p2p = true; | |
867 | /* fall through */ | |
05c914fe | 868 | case NL80211_IFTYPE_AP: |
75636525 JB |
869 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
870 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
871 | break; | |
2ca27bcf JB |
872 | case NL80211_IFTYPE_P2P_CLIENT: |
873 | type = NL80211_IFTYPE_STATION; | |
874 | sdata->vif.type = type; | |
875 | sdata->vif.p2p = true; | |
876 | /* fall through */ | |
05c914fe | 877 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 878 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 879 | break; |
46900298 JB |
880 | case NL80211_IFTYPE_ADHOC: |
881 | ieee80211_ibss_setup_sdata(sdata); | |
882 | break; | |
05c914fe | 883 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
884 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
885 | ieee80211_mesh_init_sdata(sdata); | |
886 | break; | |
05c914fe | 887 | case NL80211_IFTYPE_MONITOR: |
75636525 | 888 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 889 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
890 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
891 | MONITOR_FLAG_OTHER_BSS; | |
892 | break; | |
05c914fe JB |
893 | case NL80211_IFTYPE_WDS: |
894 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 895 | break; |
05c914fe | 896 | case NL80211_IFTYPE_UNSPECIFIED: |
2e161f78 | 897 | case NUM_NL80211_IFTYPES: |
75636525 JB |
898 | BUG(); |
899 | break; | |
900 | } | |
901 | ||
902 | ieee80211_debugfs_add_netdev(sdata); | |
903 | } | |
904 | ||
34d4bc4d JB |
905 | static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
906 | enum nl80211_iftype type) | |
907 | { | |
908 | struct ieee80211_local *local = sdata->local; | |
909 | int ret, err; | |
2ca27bcf JB |
910 | enum nl80211_iftype internal_type = type; |
911 | bool p2p = false; | |
34d4bc4d JB |
912 | |
913 | ASSERT_RTNL(); | |
914 | ||
915 | if (!local->ops->change_interface) | |
916 | return -EBUSY; | |
917 | ||
918 | switch (sdata->vif.type) { | |
919 | case NL80211_IFTYPE_AP: | |
920 | case NL80211_IFTYPE_STATION: | |
921 | case NL80211_IFTYPE_ADHOC: | |
922 | /* | |
923 | * Could maybe also all others here? | |
924 | * Just not sure how that interacts | |
925 | * with the RX/config path e.g. for | |
926 | * mesh. | |
927 | */ | |
928 | break; | |
929 | default: | |
930 | return -EBUSY; | |
931 | } | |
932 | ||
933 | switch (type) { | |
934 | case NL80211_IFTYPE_AP: | |
935 | case NL80211_IFTYPE_STATION: | |
936 | case NL80211_IFTYPE_ADHOC: | |
937 | /* | |
938 | * Could probably support everything | |
939 | * but WDS here (WDS do_open can fail | |
940 | * under memory pressure, which this | |
941 | * code isn't prepared to handle). | |
942 | */ | |
943 | break; | |
2ca27bcf JB |
944 | case NL80211_IFTYPE_P2P_CLIENT: |
945 | p2p = true; | |
946 | internal_type = NL80211_IFTYPE_STATION; | |
947 | break; | |
948 | case NL80211_IFTYPE_P2P_GO: | |
949 | p2p = true; | |
950 | internal_type = NL80211_IFTYPE_AP; | |
951 | break; | |
34d4bc4d JB |
952 | default: |
953 | return -EBUSY; | |
954 | } | |
955 | ||
2ca27bcf | 956 | ret = ieee80211_check_concurrent_iface(sdata, internal_type); |
34d4bc4d JB |
957 | if (ret) |
958 | return ret; | |
959 | ||
960 | ieee80211_do_stop(sdata, false); | |
961 | ||
962 | ieee80211_teardown_sdata(sdata->dev); | |
963 | ||
2ca27bcf | 964 | ret = drv_change_interface(local, sdata, internal_type, p2p); |
34d4bc4d JB |
965 | if (ret) |
966 | type = sdata->vif.type; | |
967 | ||
968 | ieee80211_setup_sdata(sdata, type); | |
969 | ||
970 | err = ieee80211_do_open(sdata->dev, false); | |
971 | WARN(err, "type change: do_open returned %d", err); | |
972 | ||
973 | return ret; | |
974 | } | |
975 | ||
f3947e2d | 976 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 977 | enum nl80211_iftype type) |
75636525 | 978 | { |
34d4bc4d JB |
979 | int ret; |
980 | ||
f3947e2d JB |
981 | ASSERT_RTNL(); |
982 | ||
2ca27bcf | 983 | if (type == ieee80211_vif_type_p2p(&sdata->vif)) |
f3947e2d JB |
984 | return 0; |
985 | ||
e60c7744 | 986 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
987 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
988 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
989 | return -EOPNOTSUPP; |
990 | ||
34d4bc4d JB |
991 | if (ieee80211_sdata_running(sdata)) { |
992 | ret = ieee80211_runtime_change_iftype(sdata, type); | |
993 | if (ret) | |
994 | return ret; | |
995 | } else { | |
996 | /* Purge and reset type-dependent state. */ | |
997 | ieee80211_teardown_sdata(sdata->dev); | |
998 | ieee80211_setup_sdata(sdata, type); | |
999 | } | |
75636525 JB |
1000 | |
1001 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 1002 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
1003 | ieee80211_mandatory_rates(sdata->local, |
1004 | sdata->local->hw.conf.channel->band); | |
75636525 | 1005 | sdata->drop_unencrypted = 0; |
9bc383de JB |
1006 | if (type == NL80211_IFTYPE_STATION) |
1007 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
1008 | |
1009 | return 0; | |
f0706e82 JB |
1010 | } |
1011 | ||
fa9029f8 JB |
1012 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
1013 | struct net_device *dev, | |
1014 | enum nl80211_iftype type) | |
1015 | { | |
1016 | struct ieee80211_sub_if_data *sdata; | |
1017 | u64 mask, start, addr, val, inc; | |
1018 | u8 *m; | |
1019 | u8 tmp_addr[ETH_ALEN]; | |
1020 | int i; | |
1021 | ||
1022 | /* default ... something at least */ | |
1023 | memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
1024 | ||
1025 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
1026 | local->hw.wiphy->n_addresses <= 1) | |
1027 | return; | |
1028 | ||
1029 | ||
1030 | mutex_lock(&local->iflist_mtx); | |
1031 | ||
1032 | switch (type) { | |
1033 | case NL80211_IFTYPE_MONITOR: | |
1034 | /* doesn't matter */ | |
1035 | break; | |
1036 | case NL80211_IFTYPE_WDS: | |
1037 | case NL80211_IFTYPE_AP_VLAN: | |
1038 | /* match up with an AP interface */ | |
1039 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1040 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1041 | continue; | |
1042 | memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); | |
1043 | break; | |
1044 | } | |
1045 | /* keep default if no AP interface present */ | |
1046 | break; | |
1047 | default: | |
1048 | /* assign a new address if possible -- try n_addresses first */ | |
1049 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
1050 | bool used = false; | |
1051 | ||
1052 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1053 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
1054 | sdata->vif.addr, ETH_ALEN) == 0) { | |
1055 | used = true; | |
1056 | break; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | if (!used) { | |
1061 | memcpy(dev->perm_addr, | |
1062 | local->hw.wiphy->addresses[i].addr, | |
1063 | ETH_ALEN); | |
1064 | break; | |
1065 | } | |
1066 | } | |
1067 | ||
1068 | /* try mask if available */ | |
1069 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
1070 | break; | |
1071 | ||
1072 | m = local->hw.wiphy->addr_mask; | |
1073 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1074 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1075 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1076 | ||
1077 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
1078 | /* not a contiguous mask ... not handled now! */ | |
1079 | printk(KERN_DEBUG "not contiguous\n"); | |
1080 | break; | |
1081 | } | |
1082 | ||
1083 | m = local->hw.wiphy->perm_addr; | |
1084 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1085 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1086 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1087 | ||
1088 | inc = 1ULL<<__ffs64(mask); | |
1089 | val = (start & mask); | |
1090 | addr = (start & ~mask) | (val & mask); | |
1091 | do { | |
1092 | bool used = false; | |
1093 | ||
1094 | tmp_addr[5] = addr >> 0*8; | |
1095 | tmp_addr[4] = addr >> 1*8; | |
1096 | tmp_addr[3] = addr >> 2*8; | |
1097 | tmp_addr[2] = addr >> 3*8; | |
1098 | tmp_addr[1] = addr >> 4*8; | |
1099 | tmp_addr[0] = addr >> 5*8; | |
1100 | ||
1101 | val += inc; | |
1102 | ||
1103 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1104 | if (memcmp(tmp_addr, sdata->vif.addr, | |
1105 | ETH_ALEN) == 0) { | |
1106 | used = true; | |
1107 | break; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | if (!used) { | |
1112 | memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); | |
1113 | break; | |
1114 | } | |
1115 | addr = (start & ~mask) | (val & mask); | |
1116 | } while (addr != start); | |
1117 | ||
1118 | break; | |
1119 | } | |
1120 | ||
1121 | mutex_unlock(&local->iflist_mtx); | |
1122 | } | |
1123 | ||
3e122be0 | 1124 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 1125 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 1126 | struct vif_params *params) |
f0706e82 JB |
1127 | { |
1128 | struct net_device *ndev; | |
f0706e82 | 1129 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 1130 | int ret, i; |
f0706e82 JB |
1131 | |
1132 | ASSERT_RTNL(); | |
75636525 | 1133 | |
cf0277e7 JB |
1134 | ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, |
1135 | name, ieee80211_if_setup, local->hw.queues); | |
f0706e82 JB |
1136 | if (!ndev) |
1137 | return -ENOMEM; | |
a272a720 | 1138 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
f0706e82 | 1139 | |
f3994ece JB |
1140 | ndev->needed_headroom = local->tx_headroom + |
1141 | 4*6 /* four MAC addresses */ | |
1142 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
1143 | + 6 /* mesh */ | |
1144 | + 8 /* rfc1042/bridge tunnel */ | |
1145 | - ETH_HLEN /* ethernet hard_header_len */ | |
1146 | + IEEE80211_ENCRYPT_HEADROOM; | |
1147 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
1148 | ||
f0706e82 JB |
1149 | ret = dev_alloc_name(ndev, ndev->name); |
1150 | if (ret < 0) | |
1151 | goto fail; | |
1152 | ||
fa9029f8 JB |
1153 | ieee80211_assign_perm_addr(local, ndev, type); |
1154 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
f0706e82 JB |
1155 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
1156 | ||
3e122be0 JB |
1157 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
1158 | sdata = netdev_priv(ndev); | |
f0706e82 | 1159 | ndev->ieee80211_ptr = &sdata->wdev; |
47846c9b JB |
1160 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
1161 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
75636525 JB |
1162 | |
1163 | /* initialise type-independent data */ | |
f0706e82 | 1164 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 1165 | sdata->local = local; |
75636525 | 1166 | sdata->dev = ndev; |
68542962 JO |
1167 | #ifdef CONFIG_INET |
1168 | sdata->arp_filter_state = true; | |
1169 | #endif | |
75636525 JB |
1170 | |
1171 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
1172 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
1173 | ||
1174 | INIT_LIST_HEAD(&sdata->key_list); | |
1175 | ||
37eb0b16 JM |
1176 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
1177 | struct ieee80211_supported_band *sband; | |
1178 | sband = local->hw.wiphy->bands[i]; | |
1179 | sdata->rc_rateidx_mask[i] = | |
1180 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
1181 | } | |
75636525 JB |
1182 | |
1183 | /* setup type-dependent data */ | |
1184 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 1185 | |
9bc383de JB |
1186 | if (params) { |
1187 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1188 | if (type == NL80211_IFTYPE_STATION) | |
1189 | sdata->u.mgd.use_4addr = params->use_4addr; | |
1190 | } | |
1191 | ||
f0706e82 JB |
1192 | ret = register_netdevice(ndev); |
1193 | if (ret) | |
1194 | goto fail; | |
1195 | ||
902acc78 JB |
1196 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1197 | params && params->mesh_id_len) | |
472dbc45 JB |
1198 | ieee80211_sdata_set_mesh_id(sdata, |
1199 | params->mesh_id_len, | |
1200 | params->mesh_id); | |
ee385855 | 1201 | |
c771c9d8 | 1202 | mutex_lock(&local->iflist_mtx); |
79010420 | 1203 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1204 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1205 | |
f0706e82 JB |
1206 | if (new_dev) |
1207 | *new_dev = ndev; | |
f0706e82 | 1208 | |
f0706e82 JB |
1209 | return 0; |
1210 | ||
75636525 | 1211 | fail: |
f0706e82 JB |
1212 | free_netdev(ndev); |
1213 | return ret; | |
1214 | } | |
1215 | ||
f698d856 | 1216 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1217 | { |
f0706e82 | 1218 | ASSERT_RTNL(); |
11a843b7 | 1219 | |
c771c9d8 | 1220 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1221 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1222 | mutex_unlock(&sdata->local->iflist_mtx); |
1223 | ||
75636525 | 1224 | synchronize_rcu(); |
f698d856 | 1225 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
1226 | } |
1227 | ||
75636525 JB |
1228 | /* |
1229 | * Remove all interfaces, may only be called at hardware unregistration | |
1230 | * time because it doesn't do RCU-safe list removals. | |
1231 | */ | |
1232 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1233 | { |
75636525 | 1234 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1235 | LIST_HEAD(unreg_list); |
f0706e82 JB |
1236 | |
1237 | ASSERT_RTNL(); | |
1238 | ||
efe117ab | 1239 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1240 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1241 | list_del(&sdata->list); | |
c771c9d8 | 1242 | |
efe117ab | 1243 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
f0706e82 | 1244 | } |
efe117ab ED |
1245 | mutex_unlock(&local->iflist_mtx); |
1246 | unregister_netdevice_many(&unreg_list); | |
f0706e82 | 1247 | } |
5cff20e6 JB |
1248 | |
1249 | static u32 ieee80211_idle_off(struct ieee80211_local *local, | |
1250 | const char *reason) | |
1251 | { | |
1252 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
1253 | return 0; | |
1254 | ||
1255 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 1256 | wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); |
5cff20e6 JB |
1257 | #endif |
1258 | ||
1259 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
1260 | return IEEE80211_CONF_CHANGE_IDLE; | |
1261 | } | |
1262 | ||
1263 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
1264 | { | |
1265 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
1266 | return 0; | |
1267 | ||
1268 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 1269 | wiphy_debug(local->hw.wiphy, "device now idle\n"); |
5cff20e6 JB |
1270 | #endif |
1271 | ||
a80f7c0b JB |
1272 | drv_flush(local, false); |
1273 | ||
5cff20e6 JB |
1274 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
1275 | return IEEE80211_CONF_CHANGE_IDLE; | |
1276 | } | |
1277 | ||
1278 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
1279 | { | |
1280 | struct ieee80211_sub_if_data *sdata; | |
1281 | int count = 0; | |
7da7cc1d JB |
1282 | bool working = false, scanning = false; |
1283 | struct ieee80211_work *wk; | |
5cff20e6 | 1284 | |
7da7cc1d JB |
1285 | #ifdef CONFIG_PROVE_LOCKING |
1286 | WARN_ON(debug_locks && !lockdep_rtnl_is_held() && | |
1287 | !lockdep_is_held(&local->iflist_mtx)); | |
1288 | #endif | |
1289 | lockdep_assert_held(&local->mtx); | |
5cff20e6 JB |
1290 | |
1291 | list_for_each_entry(sdata, &local->interfaces, list) { | |
7da7cc1d JB |
1292 | if (!ieee80211_sdata_running(sdata)) { |
1293 | sdata->vif.bss_conf.idle = true; | |
5cff20e6 | 1294 | continue; |
7da7cc1d JB |
1295 | } |
1296 | ||
1297 | sdata->old_idle = sdata->vif.bss_conf.idle; | |
1298 | ||
5cff20e6 JB |
1299 | /* do not count disabled managed interfaces */ |
1300 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
7da7cc1d JB |
1301 | !sdata->u.mgd.associated) { |
1302 | sdata->vif.bss_conf.idle = true; | |
5cff20e6 | 1303 | continue; |
7da7cc1d | 1304 | } |
5cff20e6 JB |
1305 | /* do not count unused IBSS interfaces */ |
1306 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
7da7cc1d JB |
1307 | !sdata->u.ibss.ssid_len) { |
1308 | sdata->vif.bss_conf.idle = true; | |
5cff20e6 | 1309 | continue; |
7da7cc1d | 1310 | } |
5cff20e6 JB |
1311 | /* count everything else */ |
1312 | count++; | |
1313 | } | |
1314 | ||
7da7cc1d JB |
1315 | list_for_each_entry(wk, &local->work_list, list) { |
1316 | working = true; | |
1317 | wk->sdata->vif.bss_conf.idle = false; | |
1318 | } | |
1319 | ||
1320 | if (local->scan_sdata) { | |
1321 | scanning = true; | |
1322 | local->scan_sdata->vif.bss_conf.idle = false; | |
1323 | } | |
1324 | ||
1325 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1326 | if (sdata->old_idle == sdata->vif.bss_conf.idle) | |
1327 | continue; | |
1328 | if (!ieee80211_sdata_running(sdata)) | |
1329 | continue; | |
1330 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); | |
1331 | } | |
1332 | ||
1333 | if (working) | |
1334 | return ieee80211_idle_off(local, "working"); | |
1335 | if (scanning) | |
1336 | return ieee80211_idle_off(local, "scanning"); | |
5cff20e6 JB |
1337 | if (!count) |
1338 | return ieee80211_idle_on(local); | |
1339 | else | |
1340 | return ieee80211_idle_off(local, "in use"); | |
1341 | ||
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
1346 | { | |
1347 | u32 chg; | |
1348 | ||
1349 | mutex_lock(&local->iflist_mtx); | |
1350 | chg = __ieee80211_recalc_idle(local); | |
1351 | mutex_unlock(&local->iflist_mtx); | |
58905ca5 JB |
1352 | if (chg) |
1353 | ieee80211_hw_config(local, chg); | |
5cff20e6 | 1354 | } |
47846c9b JB |
1355 | |
1356 | static int netdev_notify(struct notifier_block *nb, | |
1357 | unsigned long state, | |
1358 | void *ndev) | |
1359 | { | |
1360 | struct net_device *dev = ndev; | |
1361 | struct ieee80211_sub_if_data *sdata; | |
1362 | ||
1363 | if (state != NETDEV_CHANGENAME) | |
1364 | return 0; | |
1365 | ||
1366 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1367 | return 0; | |
1368 | ||
1369 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1370 | return 0; | |
1371 | ||
1372 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1373 | ||
2f5265e6 | 1374 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1375 | |
1376 | ieee80211_debugfs_rename_netdev(sdata); | |
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | static struct notifier_block mac80211_netdev_notifier = { | |
1381 | .notifier_call = netdev_notify, | |
1382 | }; | |
1383 | ||
1384 | int ieee80211_iface_init(void) | |
1385 | { | |
1386 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1387 | } | |
1388 | ||
1389 | void ieee80211_iface_exit(void) | |
1390 | { | |
1391 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1392 | } |