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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" |
1be7fe8d | 27 | #include "rate.h" |
0d143fe1 | 28 | |
c771c9d8 JB |
29 | /** |
30 | * DOC: Interface list locking | |
31 | * | |
32 | * The interface list in each struct ieee80211_local is protected | |
33 | * three-fold: | |
34 | * | |
35 | * (1) modifications may only be done under the RTNL | |
36 | * (2) modifications and readers are protected against each other by | |
37 | * the iflist_mtx. | |
38 | * (3) modifications are done in an RCU manner so atomic readers | |
39 | * can traverse the list in RCU-safe blocks. | |
40 | * | |
41 | * As a consequence, reads (traversals) of the list can be protected | |
42 | * by either the RTNL, the iflist_mtx or RCU. | |
43 | */ | |
44 | ||
45 | ||
cc45ae54 JB |
46 | static u32 ieee80211_idle_off(struct ieee80211_local *local, |
47 | const char *reason) | |
48 | { | |
49 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
50 | return 0; | |
51 | ||
52 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
53 | return IEEE80211_CONF_CHANGE_IDLE; | |
54 | } | |
55 | ||
56 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
57 | { | |
58 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
59 | return 0; | |
60 | ||
61 | drv_flush(local, false); | |
62 | ||
63 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; | |
64 | return IEEE80211_CONF_CHANGE_IDLE; | |
65 | } | |
66 | ||
67 | static u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
68 | { | |
69 | struct ieee80211_sub_if_data *sdata; | |
70 | int count = 0; | |
71 | bool working = false, scanning = false; | |
72 | unsigned int led_trig_start = 0, led_trig_stop = 0; | |
73 | struct ieee80211_roc_work *roc; | |
74 | ||
75 | #ifdef CONFIG_PROVE_LOCKING | |
76 | WARN_ON(debug_locks && !lockdep_rtnl_is_held() && | |
77 | !lockdep_is_held(&local->iflist_mtx)); | |
78 | #endif | |
79 | lockdep_assert_held(&local->mtx); | |
80 | ||
81 | list_for_each_entry(sdata, &local->interfaces, list) { | |
82 | if (!ieee80211_sdata_running(sdata)) { | |
83 | sdata->vif.bss_conf.idle = true; | |
84 | continue; | |
85 | } | |
86 | ||
87 | sdata->old_idle = sdata->vif.bss_conf.idle; | |
88 | ||
89 | /* do not count disabled managed interfaces */ | |
90 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
91 | !sdata->u.mgd.associated && | |
92 | !sdata->u.mgd.auth_data && | |
93 | !sdata->u.mgd.assoc_data) { | |
94 | sdata->vif.bss_conf.idle = true; | |
95 | continue; | |
96 | } | |
97 | /* do not count unused IBSS interfaces */ | |
98 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
99 | !sdata->u.ibss.ssid_len) { | |
100 | sdata->vif.bss_conf.idle = true; | |
101 | continue; | |
102 | } | |
f142c6b9 JB |
103 | |
104 | if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) | |
105 | continue; | |
106 | ||
cc45ae54 JB |
107 | /* count everything else */ |
108 | sdata->vif.bss_conf.idle = false; | |
109 | count++; | |
110 | } | |
111 | ||
112 | if (!local->ops->remain_on_channel) { | |
113 | list_for_each_entry(roc, &local->roc_list, list) { | |
114 | working = true; | |
115 | roc->sdata->vif.bss_conf.idle = false; | |
116 | } | |
117 | } | |
118 | ||
e2fd5dbc JB |
119 | sdata = rcu_dereference_protected(local->scan_sdata, |
120 | lockdep_is_held(&local->mtx)); | |
121 | if (sdata && !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) { | |
cc45ae54 | 122 | scanning = true; |
e2fd5dbc | 123 | sdata->vif.bss_conf.idle = false; |
cc45ae54 JB |
124 | } |
125 | ||
126 | list_for_each_entry(sdata, &local->interfaces, list) { | |
127 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
f142c6b9 JB |
128 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
129 | sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) | |
cc45ae54 JB |
130 | continue; |
131 | if (sdata->old_idle == sdata->vif.bss_conf.idle) | |
132 | continue; | |
133 | if (!ieee80211_sdata_running(sdata)) | |
134 | continue; | |
135 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); | |
136 | } | |
137 | ||
138 | if (working || scanning) | |
139 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; | |
140 | else | |
141 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; | |
142 | ||
143 | if (count) | |
144 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; | |
145 | else | |
146 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; | |
147 | ||
148 | ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); | |
149 | ||
150 | if (working) | |
151 | return ieee80211_idle_off(local, "working"); | |
152 | if (scanning) | |
153 | return ieee80211_idle_off(local, "scanning"); | |
154 | if (!count) | |
155 | return ieee80211_idle_on(local); | |
156 | else | |
157 | return ieee80211_idle_off(local, "in use"); | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
163 | { | |
164 | u32 chg; | |
165 | ||
166 | mutex_lock(&local->iflist_mtx); | |
167 | chg = __ieee80211_recalc_idle(local); | |
168 | mutex_unlock(&local->iflist_mtx); | |
169 | if (chg) | |
170 | ieee80211_hw_config(local, chg); | |
171 | } | |
172 | ||
0d143fe1 JB |
173 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
174 | { | |
175 | int meshhdrlen; | |
176 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
177 | ||
178 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
179 | ||
180 | /* FIX: what would be proper limits for MTU? | |
181 | * This interface uses 802.3 frames. */ | |
182 | if (new_mtu < 256 || | |
183 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
184 | return -EINVAL; | |
185 | } | |
186 | ||
0d143fe1 JB |
187 | dev->mtu = new_mtu; |
188 | return 0; | |
189 | } | |
190 | ||
47846c9b JB |
191 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
192 | { | |
193 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
fc5f7577 | 194 | struct sockaddr *sa = addr; |
47846c9b JB |
195 | int ret; |
196 | ||
9607e6b6 | 197 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
198 | return -EBUSY; |
199 | ||
fc5f7577 | 200 | ret = eth_mac_addr(dev, sa); |
47846c9b JB |
201 | |
202 | if (ret == 0) | |
fc5f7577 | 203 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
47846c9b JB |
204 | |
205 | return ret; | |
206 | } | |
207 | ||
0d143fe1 JB |
208 | static inline int identical_mac_addr_allowed(int type1, int type2) |
209 | { | |
210 | return type1 == NL80211_IFTYPE_MONITOR || | |
211 | type2 == NL80211_IFTYPE_MONITOR || | |
f142c6b9 JB |
212 | type1 == NL80211_IFTYPE_P2P_DEVICE || |
213 | type2 == NL80211_IFTYPE_P2P_DEVICE || | |
0d143fe1 JB |
214 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
215 | (type1 == NL80211_IFTYPE_WDS && | |
216 | (type2 == NL80211_IFTYPE_WDS || | |
217 | type2 == NL80211_IFTYPE_AP)) || | |
218 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
219 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
220 | (type2 == NL80211_IFTYPE_AP || | |
221 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
222 | } | |
223 | ||
87490f6d JB |
224 | static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, |
225 | enum nl80211_iftype iftype) | |
0d143fe1 | 226 | { |
b4a4bf5d | 227 | struct ieee80211_local *local = sdata->local; |
87490f6d | 228 | struct ieee80211_sub_if_data *nsdata; |
0d143fe1 | 229 | |
87490f6d | 230 | ASSERT_RTNL(); |
0d143fe1 JB |
231 | |
232 | /* we hold the RTNL here so can safely walk the list */ | |
233 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
371a255e | 234 | if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { |
0d143fe1 JB |
235 | /* |
236 | * Allow only a single IBSS interface to be up at any | |
237 | * time. This is restricted because beacon distribution | |
238 | * cannot work properly if both are in the same IBSS. | |
239 | * | |
240 | * To remove this restriction we'd have to disallow them | |
241 | * from setting the same SSID on different IBSS interfaces | |
242 | * belonging to the same hardware. Then, however, we're | |
243 | * faced with having to adopt two different TSF timers... | |
244 | */ | |
87490f6d | 245 | if (iftype == NL80211_IFTYPE_ADHOC && |
0d143fe1 JB |
246 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
247 | return -EBUSY; | |
248 | ||
249 | /* | |
250 | * The remaining checks are only performed for interfaces | |
251 | * with the same MAC address. | |
252 | */ | |
371a255e JB |
253 | if (!ether_addr_equal(sdata->vif.addr, |
254 | nsdata->vif.addr)) | |
0d143fe1 JB |
255 | continue; |
256 | ||
257 | /* | |
258 | * check whether it may have the same address | |
259 | */ | |
87490f6d | 260 | if (!identical_mac_addr_allowed(iftype, |
0d143fe1 JB |
261 | nsdata->vif.type)) |
262 | return -ENOTUNIQ; | |
263 | ||
264 | /* | |
265 | * can only add VLANs to enabled APs | |
266 | */ | |
87490f6d | 267 | if (iftype == NL80211_IFTYPE_AP_VLAN && |
0d143fe1 JB |
268 | nsdata->vif.type == NL80211_IFTYPE_AP) |
269 | sdata->bss = &nsdata->u.ap; | |
270 | } | |
271 | } | |
272 | ||
87490f6d JB |
273 | return 0; |
274 | } | |
275 | ||
3a25a8c8 JB |
276 | static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata) |
277 | { | |
278 | int n_queues = sdata->local->hw.queues; | |
279 | int i; | |
280 | ||
0ef24e52 IP |
281 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { |
282 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
283 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == | |
284 | IEEE80211_INVAL_HW_QUEUE)) | |
285 | return -EINVAL; | |
286 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= | |
287 | n_queues)) | |
288 | return -EINVAL; | |
289 | } | |
3a25a8c8 JB |
290 | } |
291 | ||
bb3e10fb LC |
292 | if ((sdata->vif.type != NL80211_IFTYPE_AP) || |
293 | !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) { | |
3a25a8c8 JB |
294 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
295 | return 0; | |
296 | } | |
297 | ||
298 | if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) | |
299 | return -EINVAL; | |
300 | ||
301 | if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) | |
302 | return -EINVAL; | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
85416a4f CL |
307 | void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, |
308 | const int offset) | |
309 | { | |
310 | struct ieee80211_local *local = sdata->local; | |
311 | u32 flags = sdata->u.mntr_flags; | |
312 | ||
313 | #define ADJUST(_f, _s) do { \ | |
314 | if (flags & MONITOR_FLAG_##_f) \ | |
315 | local->fif_##_s += offset; \ | |
316 | } while (0) | |
317 | ||
318 | ADJUST(FCSFAIL, fcsfail); | |
319 | ADJUST(PLCPFAIL, plcpfail); | |
320 | ADJUST(CONTROL, control); | |
321 | ADJUST(CONTROL, pspoll); | |
322 | ADJUST(OTHER_BSS, other_bss); | |
323 | ||
324 | #undef ADJUST | |
325 | } | |
326 | ||
3a25a8c8 JB |
327 | static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) |
328 | { | |
329 | struct ieee80211_local *local = sdata->local; | |
330 | int i; | |
331 | ||
332 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
333 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
334 | sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; | |
a9d3c05c | 335 | else if (local->hw.queues >= IEEE80211_NUM_ACS) |
3a25a8c8 | 336 | sdata->vif.hw_queue[i] = i; |
a9d3c05c JB |
337 | else |
338 | sdata->vif.hw_queue[i] = 0; | |
3a25a8c8 JB |
339 | } |
340 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; | |
341 | } | |
342 | ||
075e0847 | 343 | static int ieee80211_add_virtual_monitor(struct ieee80211_local *local) |
4b6f1dd6 JB |
344 | { |
345 | struct ieee80211_sub_if_data *sdata; | |
685fb72b | 346 | int ret = 0; |
4b6f1dd6 JB |
347 | |
348 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) | |
349 | return 0; | |
350 | ||
685fb72b JB |
351 | mutex_lock(&local->iflist_mtx); |
352 | ||
4b6f1dd6 | 353 | if (local->monitor_sdata) |
685fb72b | 354 | goto out_unlock; |
4b6f1dd6 JB |
355 | |
356 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); | |
685fb72b JB |
357 | if (!sdata) { |
358 | ret = -ENOMEM; | |
359 | goto out_unlock; | |
360 | } | |
4b6f1dd6 JB |
361 | |
362 | /* set up data */ | |
363 | sdata->local = local; | |
364 | sdata->vif.type = NL80211_IFTYPE_MONITOR; | |
365 | snprintf(sdata->name, IFNAMSIZ, "%s-monitor", | |
366 | wiphy_name(local->hw.wiphy)); | |
367 | ||
3a25a8c8 JB |
368 | ieee80211_set_default_queues(sdata); |
369 | ||
4b6f1dd6 JB |
370 | ret = drv_add_interface(local, sdata); |
371 | if (WARN_ON(ret)) { | |
372 | /* ok .. stupid driver, it asked for this! */ | |
373 | kfree(sdata); | |
685fb72b | 374 | goto out_unlock; |
4b6f1dd6 JB |
375 | } |
376 | ||
3a25a8c8 JB |
377 | ret = ieee80211_check_queues(sdata); |
378 | if (ret) { | |
379 | kfree(sdata); | |
685fb72b | 380 | goto out_unlock; |
3a25a8c8 JB |
381 | } |
382 | ||
55de908a JB |
383 | ret = ieee80211_vif_use_channel(sdata, local->monitor_channel, |
384 | local->monitor_channel_type, | |
385 | IEEE80211_CHANCTX_EXCLUSIVE); | |
386 | if (ret) { | |
387 | drv_remove_interface(local, sdata); | |
388 | kfree(sdata); | |
389 | goto out_unlock; | |
390 | } | |
391 | ||
4b6f1dd6 | 392 | rcu_assign_pointer(local->monitor_sdata, sdata); |
685fb72b JB |
393 | out_unlock: |
394 | mutex_unlock(&local->iflist_mtx); | |
395 | return ret; | |
4b6f1dd6 JB |
396 | } |
397 | ||
075e0847 | 398 | static void ieee80211_del_virtual_monitor(struct ieee80211_local *local) |
4b6f1dd6 JB |
399 | { |
400 | struct ieee80211_sub_if_data *sdata; | |
401 | ||
402 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) | |
403 | return; | |
404 | ||
685fb72b | 405 | mutex_lock(&local->iflist_mtx); |
4b6f1dd6 | 406 | |
685fb72b JB |
407 | sdata = rcu_dereference_protected(local->monitor_sdata, |
408 | lockdep_is_held(&local->iflist_mtx)); | |
4b6f1dd6 | 409 | if (!sdata) |
685fb72b | 410 | goto out_unlock; |
4b6f1dd6 JB |
411 | |
412 | rcu_assign_pointer(local->monitor_sdata, NULL); | |
413 | synchronize_net(); | |
414 | ||
55de908a JB |
415 | ieee80211_vif_release_channel(sdata); |
416 | ||
4b6f1dd6 JB |
417 | drv_remove_interface(local, sdata); |
418 | ||
419 | kfree(sdata); | |
685fb72b JB |
420 | out_unlock: |
421 | mutex_unlock(&local->iflist_mtx); | |
4b6f1dd6 JB |
422 | } |
423 | ||
34d4bc4d JB |
424 | /* |
425 | * NOTE: Be very careful when changing this function, it must NOT return | |
426 | * an error on interface type changes that have been pre-checked, so most | |
427 | * checks should be in ieee80211_check_concurrent_iface. | |
428 | */ | |
f142c6b9 | 429 | int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) |
87490f6d | 430 | { |
f142c6b9 JB |
431 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); |
432 | struct net_device *dev = wdev->netdev; | |
87490f6d JB |
433 | struct ieee80211_local *local = sdata->local; |
434 | struct sta_info *sta; | |
435 | u32 changed = 0; | |
436 | int res; | |
437 | u32 hw_reconf_flags = 0; | |
438 | ||
0d143fe1 JB |
439 | switch (sdata->vif.type) { |
440 | case NL80211_IFTYPE_WDS: | |
441 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
442 | return -ENOLINK; | |
443 | break; | |
665c93a9 JB |
444 | case NL80211_IFTYPE_AP_VLAN: { |
445 | struct ieee80211_sub_if_data *master; | |
446 | ||
0d143fe1 JB |
447 | if (!sdata->bss) |
448 | return -ENOLINK; | |
665c93a9 | 449 | |
0d143fe1 | 450 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
665c93a9 JB |
451 | |
452 | master = container_of(sdata->bss, | |
453 | struct ieee80211_sub_if_data, u.ap); | |
454 | sdata->control_port_protocol = | |
455 | master->control_port_protocol; | |
456 | sdata->control_port_no_encrypt = | |
457 | master->control_port_no_encrypt; | |
0d143fe1 | 458 | break; |
665c93a9 | 459 | } |
0d143fe1 JB |
460 | case NL80211_IFTYPE_AP: |
461 | sdata->bss = &sdata->u.ap; | |
462 | break; | |
463 | case NL80211_IFTYPE_MESH_POINT: | |
0d143fe1 JB |
464 | case NL80211_IFTYPE_STATION: |
465 | case NL80211_IFTYPE_MONITOR: | |
466 | case NL80211_IFTYPE_ADHOC: | |
f142c6b9 | 467 | case NL80211_IFTYPE_P2P_DEVICE: |
0d143fe1 JB |
468 | /* no special treatment */ |
469 | break; | |
470 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 471 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
472 | case NL80211_IFTYPE_P2P_CLIENT: |
473 | case NL80211_IFTYPE_P2P_GO: | |
0d143fe1 JB |
474 | /* cannot happen */ |
475 | WARN_ON(1); | |
476 | break; | |
477 | } | |
478 | ||
479 | if (local->open_count == 0) { | |
24487981 | 480 | res = drv_start(local); |
0d143fe1 JB |
481 | if (res) |
482 | goto err_del_bss; | |
4e6cbfd0 JL |
483 | if (local->ops->napi_poll) |
484 | napi_enable(&local->napi); | |
e8975581 JB |
485 | /* we're brought up, everything changes */ |
486 | hw_reconf_flags = ~0; | |
1f87f7d3 | 487 | ieee80211_led_radio(local, true); |
67408c8c JB |
488 | ieee80211_mod_tpt_led_trig(local, |
489 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
0d143fe1 JB |
490 | } |
491 | ||
492 | /* | |
bf533e0b JB |
493 | * Copy the hopefully now-present MAC address to |
494 | * this interface, if it has the special null one. | |
0d143fe1 | 495 | */ |
f142c6b9 | 496 | if (dev && is_zero_ether_addr(dev->dev_addr)) { |
bf533e0b JB |
497 | memcpy(dev->dev_addr, |
498 | local->hw.wiphy->perm_addr, | |
499 | ETH_ALEN); | |
500 | memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); | |
501 | ||
502 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
4d6c36fa JB |
503 | res = -EADDRNOTAVAIL; |
504 | goto err_stop; | |
0adc23f5 | 505 | } |
0d143fe1 JB |
506 | } |
507 | ||
0d143fe1 JB |
508 | switch (sdata->vif.type) { |
509 | case NL80211_IFTYPE_AP_VLAN: | |
3edaf3e6 JB |
510 | /* no need to tell driver, but set carrier */ |
511 | if (rtnl_dereference(sdata->bss->beacon)) | |
512 | netif_carrier_on(dev); | |
513 | else | |
514 | netif_carrier_off(dev); | |
0d143fe1 JB |
515 | break; |
516 | case NL80211_IFTYPE_MONITOR: | |
517 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
518 | local->cooked_mntrs++; | |
519 | break; | |
520 | } | |
521 | ||
075e0847 JB |
522 | if (local->monitors == 0 && local->open_count == 0) { |
523 | res = ieee80211_add_virtual_monitor(local); | |
524 | if (res) | |
525 | goto err_stop; | |
526 | } | |
527 | ||
0d143fe1 JB |
528 | /* must be before the call to ieee80211_configure_filter */ |
529 | local->monitors++; | |
e8975581 | 530 | if (local->monitors == 1) { |
0869aea0 JB |
531 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
532 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 533 | } |
0d143fe1 | 534 | |
85416a4f | 535 | ieee80211_adjust_monitor_flags(sdata, 1); |
0d143fe1 | 536 | ieee80211_configure_filter(local); |
53e9b1de DG |
537 | |
538 | netif_carrier_on(dev); | |
0d143fe1 | 539 | break; |
0d143fe1 | 540 | default: |
34d4bc4d | 541 | if (coming_up) { |
075e0847 JB |
542 | ieee80211_del_virtual_monitor(local); |
543 | ||
7b7eab6f | 544 | res = drv_add_interface(local, sdata); |
34d4bc4d JB |
545 | if (res) |
546 | goto err_stop; | |
3a25a8c8 JB |
547 | res = ieee80211_check_queues(sdata); |
548 | if (res) | |
549 | goto err_del_interface; | |
34d4bc4d | 550 | } |
0d143fe1 | 551 | |
29cbe68c | 552 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
e3b90ca2 | 553 | local->fif_pspoll++; |
7be5086d | 554 | local->fif_probe_req++; |
e3b90ca2 | 555 | |
e3b90ca2 | 556 | ieee80211_configure_filter(local); |
7be5086d JB |
557 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
558 | local->fif_probe_req++; | |
a3c9aa51 | 559 | } |
e3b90ca2 | 560 | |
f142c6b9 JB |
561 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) |
562 | changed |= ieee80211_reset_erp_info(sdata); | |
0d143fe1 | 563 | ieee80211_bss_info_change_notify(sdata, changed); |
0d143fe1 | 564 | |
c405c629 JB |
565 | switch (sdata->vif.type) { |
566 | case NL80211_IFTYPE_STATION: | |
567 | case NL80211_IFTYPE_ADHOC: | |
568 | case NL80211_IFTYPE_AP: | |
569 | case NL80211_IFTYPE_MESH_POINT: | |
0d143fe1 | 570 | netif_carrier_off(dev); |
c405c629 | 571 | break; |
1411af15 | 572 | case NL80211_IFTYPE_WDS: |
f142c6b9 | 573 | case NL80211_IFTYPE_P2P_DEVICE: |
1411af15 | 574 | break; |
c405c629 | 575 | default: |
0d143fe1 | 576 | netif_carrier_on(dev); |
c405c629 | 577 | } |
59034591 EP |
578 | |
579 | /* | |
580 | * set default queue parameters so drivers don't | |
581 | * need to initialise the hardware if the hardware | |
582 | * doesn't start up with sane defaults | |
583 | */ | |
3abead59 | 584 | ieee80211_set_wmm_default(sdata, true); |
0d143fe1 JB |
585 | } |
586 | ||
2d2080c3 JB |
587 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
588 | ||
0d143fe1 JB |
589 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
590 | /* Create STA entry for the WDS peer */ | |
591 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
592 | GFP_KERNEL); | |
593 | if (!sta) { | |
594 | res = -ENOMEM; | |
595 | goto err_del_interface; | |
596 | } | |
597 | ||
83d5cc01 JB |
598 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
599 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
600 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
0d143fe1 JB |
601 | |
602 | res = sta_info_insert(sta); | |
603 | if (res) { | |
604 | /* STA has been freed */ | |
605 | goto err_del_interface; | |
606 | } | |
1be7fe8d BJ |
607 | |
608 | rate_control_rate_init(sta); | |
1411af15 | 609 | netif_carrier_on(dev); |
f142c6b9 JB |
610 | } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
611 | rcu_assign_pointer(local->p2p_sdata, sdata); | |
0d143fe1 JB |
612 | } |
613 | ||
0d143fe1 JB |
614 | /* |
615 | * set_multicast_list will be invoked by the networking core | |
616 | * which will check whether any increments here were done in | |
617 | * error and sync them down to the hardware as filter flags. | |
618 | */ | |
619 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
620 | atomic_inc(&local->iff_allmultis); | |
621 | ||
622 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
623 | atomic_inc(&local->iff_promiscs); | |
624 | ||
7da7cc1d | 625 | mutex_lock(&local->mtx); |
5cff20e6 | 626 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
7da7cc1d | 627 | mutex_unlock(&local->mtx); |
5cff20e6 | 628 | |
34d4bc4d JB |
629 | if (coming_up) |
630 | local->open_count++; | |
631 | ||
59034591 | 632 | if (hw_reconf_flags) |
e8975581 | 633 | ieee80211_hw_config(local, hw_reconf_flags); |
0d143fe1 | 634 | |
10f644a4 | 635 | ieee80211_recalc_ps(local, -1); |
965bedad | 636 | |
f142c6b9 JB |
637 | if (dev) |
638 | netif_tx_start_all_queues(dev); | |
0d143fe1 JB |
639 | |
640 | return 0; | |
641 | err_del_interface: | |
7b7eab6f | 642 | drv_remove_interface(local, sdata); |
0d143fe1 | 643 | err_stop: |
24487981 JB |
644 | if (!local->open_count) |
645 | drv_stop(local); | |
0d143fe1 JB |
646 | err_del_bss: |
647 | sdata->bss = NULL; | |
648 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
649 | list_del(&sdata->u.vlan.list); | |
4d6c36fa | 650 | /* might already be clear but that doesn't matter */ |
2d2080c3 | 651 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
0d143fe1 JB |
652 | return res; |
653 | } | |
654 | ||
34d4bc4d | 655 | static int ieee80211_open(struct net_device *dev) |
0d143fe1 JB |
656 | { |
657 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
34d4bc4d JB |
658 | int err; |
659 | ||
660 | /* fail early if user set an invalid address */ | |
2fcf2824 | 661 | if (!is_valid_ether_addr(dev->dev_addr)) |
34d4bc4d JB |
662 | return -EADDRNOTAVAIL; |
663 | ||
664 | err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); | |
665 | if (err) | |
666 | return err; | |
667 | ||
f142c6b9 | 668 | return ieee80211_do_open(&sdata->wdev, true); |
34d4bc4d JB |
669 | } |
670 | ||
671 | static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, | |
672 | bool going_down) | |
673 | { | |
0d143fe1 | 674 | struct ieee80211_local *local = sdata->local; |
5061b0c2 JB |
675 | unsigned long flags; |
676 | struct sk_buff *skb, *tmp; | |
e8975581 | 677 | u32 hw_reconf_flags = 0; |
5061b0c2 | 678 | int i; |
0d143fe1 | 679 | |
c29acf20 RM |
680 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
681 | ||
e2fd5dbc | 682 | if (rcu_access_pointer(local->scan_sdata) == sdata) |
352ffad6 BC |
683 | ieee80211_scan_cancel(local); |
684 | ||
0d143fe1 JB |
685 | /* |
686 | * Stop TX on this interface first. | |
687 | */ | |
f142c6b9 JB |
688 | if (sdata->dev) |
689 | netif_tx_stop_all_queues(sdata->dev); | |
0d143fe1 | 690 | |
2eb278e0 | 691 | ieee80211_roc_purge(sdata); |
af6b6374 | 692 | |
0d143fe1 JB |
693 | /* |
694 | * Remove all stations associated with this interface. | |
695 | * | |
696 | * This must be done before calling ops->remove_interface() | |
697 | * because otherwise we can later invoke ops->sta_notify() | |
698 | * whenever the STAs are removed, and that invalidates driver | |
699 | * assumptions about always getting a vif pointer that is valid | |
700 | * (because if we remove a STA after ops->remove_interface() | |
701 | * the driver will have removed the vif info already!) | |
702 | * | |
b9dcf712 JB |
703 | * This is relevant only in AP, WDS and mesh modes, since in |
704 | * all other modes we've already removed all stations when | |
705 | * disconnecting etc. | |
0d143fe1 JB |
706 | */ |
707 | sta_info_flush(local, sdata); | |
708 | ||
709 | /* | |
710 | * Don't count this interface for promisc/allmulti while it | |
711 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
712 | * on the master interface which will sync these down to the | |
713 | * hardware as filter flags. | |
714 | */ | |
715 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
716 | atomic_dec(&local->iff_allmultis); | |
717 | ||
718 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
719 | atomic_dec(&local->iff_promiscs); | |
720 | ||
7be5086d | 721 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
e3b90ca2 | 722 | local->fif_pspoll--; |
7be5086d JB |
723 | local->fif_probe_req--; |
724 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
725 | local->fif_probe_req--; | |
726 | } | |
e3b90ca2 | 727 | |
f142c6b9 JB |
728 | if (sdata->dev) { |
729 | netif_addr_lock_bh(sdata->dev); | |
730 | spin_lock_bh(&local->filter_lock); | |
731 | __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, | |
732 | sdata->dev->addr_len); | |
733 | spin_unlock_bh(&local->filter_lock); | |
734 | netif_addr_unlock_bh(sdata->dev); | |
3b8d81e0 | 735 | |
f142c6b9 JB |
736 | ieee80211_configure_filter(local); |
737 | } | |
3ac64bee | 738 | |
7cbf0ba5 VN |
739 | del_timer_sync(&local->dynamic_ps_timer); |
740 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 | 741 | |
04ecd257 JB |
742 | cancel_work_sync(&sdata->recalc_smps); |
743 | ||
0d143fe1 JB |
744 | /* APs need special treatment */ |
745 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 746 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
40b275b6 JB |
747 | struct beacon_data *old_beacon = |
748 | rtnl_dereference(sdata->u.ap.beacon); | |
aa7a0080 | 749 | struct probe_resp *old_probe_resp = |
02945821 | 750 | rtnl_dereference(sdata->u.ap.probe_resp); |
0d143fe1 | 751 | |
b9dcf712 JB |
752 | /* sdata_running will return false, so this will disable */ |
753 | ieee80211_bss_info_change_notify(sdata, | |
754 | BSS_CHANGED_BEACON_ENABLED); | |
755 | ||
02945821 | 756 | /* remove beacon and probe response */ |
a9b3cd7f | 757 | RCU_INIT_POINTER(sdata->u.ap.beacon, NULL); |
02945821 | 758 | RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL); |
0d143fe1 JB |
759 | synchronize_rcu(); |
760 | kfree(old_beacon); | |
aa7a0080 | 761 | kfree(old_probe_resp); |
0d143fe1 JB |
762 | |
763 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 764 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
765 | u.vlan.list) |
766 | dev_close(vlan->dev); | |
767 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
6f2d9335 JB |
768 | |
769 | /* free all potentially still buffered bcast frames */ | |
770 | local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf); | |
771 | skb_queue_purge(&sdata->u.ap.ps_bc_buf); | |
afa762f6 EP |
772 | } else if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
773 | ieee80211_mgd_stop(sdata); | |
0d143fe1 JB |
774 | } |
775 | ||
34d4bc4d JB |
776 | if (going_down) |
777 | local->open_count--; | |
0d143fe1 JB |
778 | |
779 | switch (sdata->vif.type) { | |
780 | case NL80211_IFTYPE_AP_VLAN: | |
781 | list_del(&sdata->u.vlan.list); | |
782 | /* no need to tell driver */ | |
783 | break; | |
784 | case NL80211_IFTYPE_MONITOR: | |
785 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
786 | local->cooked_mntrs--; | |
787 | break; | |
788 | } | |
789 | ||
790 | local->monitors--; | |
e8975581 | 791 | if (local->monitors == 0) { |
0869aea0 JB |
792 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
793 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
075e0847 | 794 | ieee80211_del_virtual_monitor(local); |
e8975581 | 795 | } |
0d143fe1 | 796 | |
85416a4f | 797 | ieee80211_adjust_monitor_flags(sdata, -1); |
0d143fe1 | 798 | ieee80211_configure_filter(local); |
0d143fe1 | 799 | break; |
f142c6b9 JB |
800 | case NL80211_IFTYPE_P2P_DEVICE: |
801 | /* relies on synchronize_rcu() below */ | |
802 | rcu_assign_pointer(local->p2p_sdata, NULL); | |
803 | /* fall through */ | |
0d143fe1 | 804 | default: |
c1475ca9 | 805 | flush_work(&sdata->work); |
35f20c14 JB |
806 | /* |
807 | * When we get here, the interface is marked down. | |
b22cfcfc | 808 | * Call rcu_barrier() to wait both for the RX path |
35f20c14 | 809 | * should it be using the interface and enqueuing |
b22cfcfc EP |
810 | * frames at this very time on another CPU, and |
811 | * for the sta free call_rcu callbacks. | |
35f20c14 | 812 | */ |
b22cfcfc EP |
813 | rcu_barrier(); |
814 | ||
815 | /* | |
816 | * free_sta_rcu() enqueues a work for the actual | |
817 | * sta cleanup, so we need to flush it while | |
818 | * sdata is still valid. | |
819 | */ | |
820 | flush_workqueue(local->workqueue); | |
821 | ||
35f20c14 JB |
822 | skb_queue_purge(&sdata->skb_queue); |
823 | ||
b9dcf712 JB |
824 | /* |
825 | * Free all remaining keys, there shouldn't be any, | |
826 | * except maybe group keys in AP more or WDS? | |
827 | */ | |
ad0e2b5a | 828 | ieee80211_free_keys(sdata); |
b9dcf712 | 829 | |
34d4bc4d | 830 | if (going_down) |
7b7eab6f | 831 | drv_remove_interface(local, sdata); |
0d143fe1 JB |
832 | } |
833 | ||
834 | sdata->bss = NULL; | |
835 | ||
7da7cc1d | 836 | mutex_lock(&local->mtx); |
5cff20e6 | 837 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
7da7cc1d | 838 | mutex_unlock(&local->mtx); |
5cff20e6 JB |
839 | |
840 | ieee80211_recalc_ps(local, -1); | |
841 | ||
0d143fe1 | 842 | if (local->open_count == 0) { |
4e6cbfd0 JL |
843 | if (local->ops->napi_poll) |
844 | napi_disable(&local->napi); | |
ea77f12f | 845 | ieee80211_clear_tx_pending(local); |
84f6a01c | 846 | ieee80211_stop_device(local); |
0d143fe1 | 847 | |
e8975581 JB |
848 | /* no reconfiguring after stop! */ |
849 | hw_reconf_flags = 0; | |
0d143fe1 JB |
850 | } |
851 | ||
e8975581 | 852 | /* do after stop to avoid reconfiguring when we stop anyway */ |
55de908a | 853 | if (hw_reconf_flags) |
e8975581 JB |
854 | ieee80211_hw_config(local, hw_reconf_flags); |
855 | ||
5061b0c2 JB |
856 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
857 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
858 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
859 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
860 | if (info->control.vif == &sdata->vif) { | |
861 | __skb_unlink(skb, &local->pending[i]); | |
862 | dev_kfree_skb_irq(skb); | |
863 | } | |
864 | } | |
865 | } | |
866 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
075e0847 JB |
867 | |
868 | if (local->monitors == local->open_count && local->monitors > 0) | |
869 | ieee80211_add_virtual_monitor(local); | |
34d4bc4d JB |
870 | } |
871 | ||
872 | static int ieee80211_stop(struct net_device *dev) | |
873 | { | |
874 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
875 | ||
876 | ieee80211_do_stop(sdata, true); | |
5061b0c2 | 877 | |
0d143fe1 JB |
878 | return 0; |
879 | } | |
880 | ||
881 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
882 | { | |
0d143fe1 | 883 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 884 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
885 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
886 | ||
887 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
888 | promisc = !!(dev->flags & IFF_PROMISC); | |
889 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
890 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
891 | ||
892 | if (allmulti != sdata_allmulti) { | |
893 | if (dev->flags & IFF_ALLMULTI) | |
894 | atomic_inc(&local->iff_allmultis); | |
895 | else | |
896 | atomic_dec(&local->iff_allmultis); | |
897 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
898 | } | |
899 | ||
900 | if (promisc != sdata_promisc) { | |
901 | if (dev->flags & IFF_PROMISC) | |
902 | atomic_inc(&local->iff_promiscs); | |
903 | else | |
904 | atomic_dec(&local->iff_promiscs); | |
905 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
906 | } | |
3b8d81e0 | 907 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 908 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 909 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 910 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
911 | } |
912 | ||
75636525 JB |
913 | /* |
914 | * Called when the netdev is removed or, by the code below, before | |
915 | * the interface type changes. | |
916 | */ | |
f142c6b9 | 917 | static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 918 | { |
75636525 | 919 | struct ieee80211_local *local = sdata->local; |
75636525 | 920 | int flushed; |
f0706e82 JB |
921 | int i; |
922 | ||
75636525 JB |
923 | /* free extra data */ |
924 | ieee80211_free_keys(sdata); | |
925 | ||
aee14ceb JM |
926 | ieee80211_debugfs_remove_netdev(sdata); |
927 | ||
f0706e82 | 928 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
929 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
930 | sdata->fragment_next = 0; | |
11a843b7 | 931 | |
b9dcf712 JB |
932 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
933 | mesh_rmc_free(sdata); | |
75636525 JB |
934 | |
935 | flushed = sta_info_flush(local, sdata); | |
936 | WARN_ON(flushed); | |
f0706e82 JB |
937 | } |
938 | ||
f142c6b9 JB |
939 | static void ieee80211_uninit(struct net_device *dev) |
940 | { | |
941 | ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); | |
942 | } | |
943 | ||
cf0277e7 JB |
944 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
945 | struct sk_buff *skb) | |
946 | { | |
947 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
948 | } | |
949 | ||
587e729e JB |
950 | static const struct net_device_ops ieee80211_dataif_ops = { |
951 | .ndo_open = ieee80211_open, | |
952 | .ndo_stop = ieee80211_stop, | |
f142c6b9 | 953 | .ndo_uninit = ieee80211_uninit, |
587e729e | 954 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
afc4b13d | 955 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
587e729e | 956 | .ndo_change_mtu = ieee80211_change_mtu, |
47846c9b | 957 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 958 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
959 | }; |
960 | ||
cf0277e7 JB |
961 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
962 | struct sk_buff *skb) | |
963 | { | |
964 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
965 | struct ieee80211_local *local = sdata->local; | |
966 | struct ieee80211_hdr *hdr; | |
967 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
968 | ||
32c5057b | 969 | if (local->hw.queues < IEEE80211_NUM_ACS) |
cf0277e7 JB |
970 | return 0; |
971 | ||
972 | if (skb->len < 4 || | |
b49bb574 | 973 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
974 | return 0; /* doesn't matter, frame will be dropped */ |
975 | ||
b49bb574 | 976 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 977 | |
00e96dec | 978 | return ieee80211_select_queue_80211(sdata, skb, hdr); |
cf0277e7 JB |
979 | } |
980 | ||
587e729e JB |
981 | static const struct net_device_ops ieee80211_monitorif_ops = { |
982 | .ndo_open = ieee80211_open, | |
983 | .ndo_stop = ieee80211_stop, | |
f142c6b9 | 984 | .ndo_uninit = ieee80211_uninit, |
587e729e | 985 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
afc4b13d | 986 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
587e729e JB |
987 | .ndo_change_mtu = ieee80211_change_mtu, |
988 | .ndo_set_mac_address = eth_mac_addr, | |
cf0277e7 | 989 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
990 | }; |
991 | ||
992 | static void ieee80211_if_setup(struct net_device *dev) | |
993 | { | |
994 | ether_setup(dev); | |
550fd08c | 995 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
587e729e | 996 | dev->netdev_ops = &ieee80211_dataif_ops; |
587e729e JB |
997 | dev->destructor = free_netdev; |
998 | } | |
999 | ||
1fa57d01 JB |
1000 | static void ieee80211_iface_work(struct work_struct *work) |
1001 | { | |
1002 | struct ieee80211_sub_if_data *sdata = | |
1003 | container_of(work, struct ieee80211_sub_if_data, work); | |
1004 | struct ieee80211_local *local = sdata->local; | |
1005 | struct sk_buff *skb; | |
344eec67 | 1006 | struct sta_info *sta; |
c1475ca9 | 1007 | struct ieee80211_ra_tid *ra_tid; |
1fa57d01 JB |
1008 | |
1009 | if (!ieee80211_sdata_running(sdata)) | |
1010 | return; | |
1011 | ||
1012 | if (local->scanning) | |
1013 | return; | |
1014 | ||
1015 | /* | |
1016 | * ieee80211_queue_work() should have picked up most cases, | |
1017 | * here we'll pick the rest. | |
1018 | */ | |
1019 | if (WARN(local->suspended, | |
1020 | "interface work scheduled while going to suspend\n")) | |
1021 | return; | |
1022 | ||
1023 | /* first process frames */ | |
1024 | while ((skb = skb_dequeue(&sdata->skb_queue))) { | |
bed7ee6e JB |
1025 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
1026 | ||
c1475ca9 JB |
1027 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
1028 | ra_tid = (void *)&skb->cb; | |
1029 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
1030 | ra_tid->tid); | |
1031 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { | |
1032 | ra_tid = (void *)&skb->cb; | |
1033 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
1034 | ra_tid->tid); | |
1035 | } else if (ieee80211_is_action(mgmt->frame_control) && | |
1036 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { | |
bed7ee6e | 1037 | int len = skb->len; |
bed7ee6e | 1038 | |
a93e3644 | 1039 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 1040 | sta = sta_info_get_bss(sdata, mgmt->sa); |
bed7ee6e JB |
1041 | if (sta) { |
1042 | switch (mgmt->u.action.u.addba_req.action_code) { | |
1043 | case WLAN_ACTION_ADDBA_REQ: | |
1044 | ieee80211_process_addba_request( | |
1045 | local, sta, mgmt, len); | |
1046 | break; | |
1047 | case WLAN_ACTION_ADDBA_RESP: | |
1048 | ieee80211_process_addba_resp(local, sta, | |
1049 | mgmt, len); | |
1050 | break; | |
1051 | case WLAN_ACTION_DELBA: | |
1052 | ieee80211_process_delba(sdata, sta, | |
1053 | mgmt, len); | |
1054 | break; | |
1055 | default: | |
1056 | WARN_ON(1); | |
1057 | break; | |
1058 | } | |
1059 | } | |
a93e3644 | 1060 | mutex_unlock(&local->sta_mtx); |
344eec67 JB |
1061 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
1062 | struct ieee80211_hdr *hdr = (void *)mgmt; | |
1063 | /* | |
1064 | * So the frame isn't mgmt, but frame_control | |
1065 | * is at the right place anyway, of course, so | |
1066 | * the if statement is correct. | |
1067 | * | |
1068 | * Warn if we have other data frame types here, | |
1069 | * they must not get here. | |
1070 | */ | |
1071 | WARN_ON(hdr->frame_control & | |
1072 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); | |
1073 | WARN_ON(!(hdr->seq_ctrl & | |
1074 | cpu_to_le16(IEEE80211_SCTL_FRAG))); | |
1075 | /* | |
1076 | * This was a fragment of a frame, received while | |
1077 | * a block-ack session was active. That cannot be | |
1078 | * right, so terminate the session. | |
1079 | */ | |
a93e3644 | 1080 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 1081 | sta = sta_info_get_bss(sdata, mgmt->sa); |
344eec67 JB |
1082 | if (sta) { |
1083 | u16 tid = *ieee80211_get_qos_ctl(hdr) & | |
1084 | IEEE80211_QOS_CTL_TID_MASK; | |
1085 | ||
1086 | __ieee80211_stop_rx_ba_session( | |
1087 | sta, tid, WLAN_BACK_RECIPIENT, | |
53f73c09 JB |
1088 | WLAN_REASON_QSTA_REQUIRE_SETUP, |
1089 | true); | |
344eec67 | 1090 | } |
a93e3644 | 1091 | mutex_unlock(&local->sta_mtx); |
bed7ee6e | 1092 | } else switch (sdata->vif.type) { |
1fa57d01 JB |
1093 | case NL80211_IFTYPE_STATION: |
1094 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
1095 | break; | |
1096 | case NL80211_IFTYPE_ADHOC: | |
1097 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
1098 | break; | |
1099 | case NL80211_IFTYPE_MESH_POINT: | |
1100 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
1101 | break; | |
1102 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
1103 | break; | |
1104 | default: | |
1105 | WARN(1, "frame for unexpected interface type"); | |
1fa57d01 JB |
1106 | break; |
1107 | } | |
36b3a628 JB |
1108 | |
1109 | kfree_skb(skb); | |
1fa57d01 JB |
1110 | } |
1111 | ||
1112 | /* then other type-dependent work */ | |
1113 | switch (sdata->vif.type) { | |
1114 | case NL80211_IFTYPE_STATION: | |
1115 | ieee80211_sta_work(sdata); | |
1116 | break; | |
1117 | case NL80211_IFTYPE_ADHOC: | |
1118 | ieee80211_ibss_work(sdata); | |
1119 | break; | |
1120 | case NL80211_IFTYPE_MESH_POINT: | |
1121 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
1122 | break; | |
1123 | ieee80211_mesh_work(sdata); | |
1124 | break; | |
1125 | default: | |
1126 | break; | |
1127 | } | |
1128 | } | |
1129 | ||
04ecd257 JB |
1130 | static void ieee80211_recalc_smps_work(struct work_struct *work) |
1131 | { | |
1132 | struct ieee80211_sub_if_data *sdata = | |
1133 | container_of(work, struct ieee80211_sub_if_data, recalc_smps); | |
1134 | ||
1135 | ieee80211_recalc_smps(sdata); | |
1136 | } | |
1fa57d01 | 1137 | |
75636525 JB |
1138 | /* |
1139 | * Helper function to initialise an interface to a specific type. | |
1140 | */ | |
1141 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 1142 | enum nl80211_iftype type) |
f0706e82 | 1143 | { |
75636525 JB |
1144 | /* clear type-dependent union */ |
1145 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
1146 | ||
1147 | /* and set some type-dependent values */ | |
1148 | sdata->vif.type = type; | |
2ca27bcf | 1149 | sdata->vif.p2p = false; |
60719ffd | 1150 | sdata->wdev.iftype = type; |
75636525 | 1151 | |
a621fa4d JB |
1152 | sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
1153 | sdata->control_port_no_encrypt = false; | |
1154 | ||
b53be792 SW |
1155 | sdata->noack_map = 0; |
1156 | ||
f142c6b9 JB |
1157 | /* only monitor/p2p-device differ */ |
1158 | if (sdata->dev) { | |
1159 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; | |
1160 | sdata->dev->type = ARPHRD_ETHER; | |
1161 | } | |
75636525 | 1162 | |
35f20c14 | 1163 | skb_queue_head_init(&sdata->skb_queue); |
1fa57d01 | 1164 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
04ecd257 | 1165 | INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); |
35f20c14 | 1166 | |
75636525 | 1167 | switch (type) { |
2ca27bcf JB |
1168 | case NL80211_IFTYPE_P2P_GO: |
1169 | type = NL80211_IFTYPE_AP; | |
1170 | sdata->vif.type = type; | |
1171 | sdata->vif.p2p = true; | |
1172 | /* fall through */ | |
05c914fe | 1173 | case NL80211_IFTYPE_AP: |
75636525 JB |
1174 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
1175 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
1176 | break; | |
2ca27bcf JB |
1177 | case NL80211_IFTYPE_P2P_CLIENT: |
1178 | type = NL80211_IFTYPE_STATION; | |
1179 | sdata->vif.type = type; | |
1180 | sdata->vif.p2p = true; | |
1181 | /* fall through */ | |
05c914fe | 1182 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 1183 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 1184 | break; |
46900298 JB |
1185 | case NL80211_IFTYPE_ADHOC: |
1186 | ieee80211_ibss_setup_sdata(sdata); | |
1187 | break; | |
05c914fe | 1188 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
1189 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1190 | ieee80211_mesh_init_sdata(sdata); | |
1191 | break; | |
05c914fe | 1192 | case NL80211_IFTYPE_MONITOR: |
75636525 | 1193 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 1194 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
1195 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
1196 | MONITOR_FLAG_OTHER_BSS; | |
1197 | break; | |
05c914fe JB |
1198 | case NL80211_IFTYPE_WDS: |
1199 | case NL80211_IFTYPE_AP_VLAN: | |
98104fde | 1200 | case NL80211_IFTYPE_P2P_DEVICE: |
f142c6b9 | 1201 | break; |
05c914fe | 1202 | case NL80211_IFTYPE_UNSPECIFIED: |
2e161f78 | 1203 | case NUM_NL80211_IFTYPES: |
75636525 JB |
1204 | BUG(); |
1205 | break; | |
1206 | } | |
1207 | ||
1208 | ieee80211_debugfs_add_netdev(sdata); | |
1209 | } | |
1210 | ||
34d4bc4d JB |
1211 | static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
1212 | enum nl80211_iftype type) | |
1213 | { | |
1214 | struct ieee80211_local *local = sdata->local; | |
1215 | int ret, err; | |
2ca27bcf JB |
1216 | enum nl80211_iftype internal_type = type; |
1217 | bool p2p = false; | |
34d4bc4d JB |
1218 | |
1219 | ASSERT_RTNL(); | |
1220 | ||
1221 | if (!local->ops->change_interface) | |
1222 | return -EBUSY; | |
1223 | ||
1224 | switch (sdata->vif.type) { | |
1225 | case NL80211_IFTYPE_AP: | |
1226 | case NL80211_IFTYPE_STATION: | |
1227 | case NL80211_IFTYPE_ADHOC: | |
1228 | /* | |
1229 | * Could maybe also all others here? | |
1230 | * Just not sure how that interacts | |
1231 | * with the RX/config path e.g. for | |
1232 | * mesh. | |
1233 | */ | |
1234 | break; | |
1235 | default: | |
1236 | return -EBUSY; | |
1237 | } | |
1238 | ||
1239 | switch (type) { | |
1240 | case NL80211_IFTYPE_AP: | |
1241 | case NL80211_IFTYPE_STATION: | |
1242 | case NL80211_IFTYPE_ADHOC: | |
1243 | /* | |
1244 | * Could probably support everything | |
1245 | * but WDS here (WDS do_open can fail | |
1246 | * under memory pressure, which this | |
1247 | * code isn't prepared to handle). | |
1248 | */ | |
1249 | break; | |
2ca27bcf JB |
1250 | case NL80211_IFTYPE_P2P_CLIENT: |
1251 | p2p = true; | |
1252 | internal_type = NL80211_IFTYPE_STATION; | |
1253 | break; | |
1254 | case NL80211_IFTYPE_P2P_GO: | |
1255 | p2p = true; | |
1256 | internal_type = NL80211_IFTYPE_AP; | |
1257 | break; | |
34d4bc4d JB |
1258 | default: |
1259 | return -EBUSY; | |
1260 | } | |
1261 | ||
2ca27bcf | 1262 | ret = ieee80211_check_concurrent_iface(sdata, internal_type); |
34d4bc4d JB |
1263 | if (ret) |
1264 | return ret; | |
1265 | ||
1266 | ieee80211_do_stop(sdata, false); | |
1267 | ||
f142c6b9 | 1268 | ieee80211_teardown_sdata(sdata); |
34d4bc4d | 1269 | |
2ca27bcf | 1270 | ret = drv_change_interface(local, sdata, internal_type, p2p); |
34d4bc4d JB |
1271 | if (ret) |
1272 | type = sdata->vif.type; | |
1273 | ||
3a25a8c8 JB |
1274 | /* |
1275 | * Ignore return value here, there's not much we can do since | |
1276 | * the driver changed the interface type internally already. | |
1277 | * The warnings will hopefully make driver authors fix it :-) | |
1278 | */ | |
1279 | ieee80211_check_queues(sdata); | |
1280 | ||
34d4bc4d JB |
1281 | ieee80211_setup_sdata(sdata, type); |
1282 | ||
f142c6b9 | 1283 | err = ieee80211_do_open(&sdata->wdev, false); |
34d4bc4d JB |
1284 | WARN(err, "type change: do_open returned %d", err); |
1285 | ||
1286 | return ret; | |
1287 | } | |
1288 | ||
f3947e2d | 1289 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 1290 | enum nl80211_iftype type) |
75636525 | 1291 | { |
34d4bc4d JB |
1292 | int ret; |
1293 | ||
f3947e2d JB |
1294 | ASSERT_RTNL(); |
1295 | ||
2ca27bcf | 1296 | if (type == ieee80211_vif_type_p2p(&sdata->vif)) |
f3947e2d JB |
1297 | return 0; |
1298 | ||
34d4bc4d JB |
1299 | if (ieee80211_sdata_running(sdata)) { |
1300 | ret = ieee80211_runtime_change_iftype(sdata, type); | |
1301 | if (ret) | |
1302 | return ret; | |
1303 | } else { | |
1304 | /* Purge and reset type-dependent state. */ | |
f142c6b9 | 1305 | ieee80211_teardown_sdata(sdata); |
34d4bc4d JB |
1306 | ieee80211_setup_sdata(sdata, type); |
1307 | } | |
75636525 JB |
1308 | |
1309 | /* reset some values that shouldn't be kept across type changes */ | |
75636525 | 1310 | sdata->drop_unencrypted = 0; |
9bc383de JB |
1311 | if (type == NL80211_IFTYPE_STATION) |
1312 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
1313 | |
1314 | return 0; | |
f0706e82 JB |
1315 | } |
1316 | ||
fa9029f8 | 1317 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
f142c6b9 | 1318 | u8 *perm_addr, enum nl80211_iftype type) |
fa9029f8 JB |
1319 | { |
1320 | struct ieee80211_sub_if_data *sdata; | |
1321 | u64 mask, start, addr, val, inc; | |
1322 | u8 *m; | |
1323 | u8 tmp_addr[ETH_ALEN]; | |
1324 | int i; | |
1325 | ||
1326 | /* default ... something at least */ | |
f142c6b9 | 1327 | memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
fa9029f8 JB |
1328 | |
1329 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
1330 | local->hw.wiphy->n_addresses <= 1) | |
1331 | return; | |
1332 | ||
fa9029f8 JB |
1333 | mutex_lock(&local->iflist_mtx); |
1334 | ||
1335 | switch (type) { | |
1336 | case NL80211_IFTYPE_MONITOR: | |
1337 | /* doesn't matter */ | |
1338 | break; | |
1339 | case NL80211_IFTYPE_WDS: | |
1340 | case NL80211_IFTYPE_AP_VLAN: | |
1341 | /* match up with an AP interface */ | |
1342 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1343 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1344 | continue; | |
f142c6b9 | 1345 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
fa9029f8 JB |
1346 | break; |
1347 | } | |
1348 | /* keep default if no AP interface present */ | |
1349 | break; | |
6d71117a JB |
1350 | case NL80211_IFTYPE_P2P_CLIENT: |
1351 | case NL80211_IFTYPE_P2P_GO: | |
1352 | if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) { | |
1353 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1354 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) | |
1355 | continue; | |
1356 | if (!ieee80211_sdata_running(sdata)) | |
1357 | continue; | |
1358 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); | |
1359 | goto out_unlock; | |
1360 | } | |
1361 | } | |
1362 | /* otherwise fall through */ | |
fa9029f8 JB |
1363 | default: |
1364 | /* assign a new address if possible -- try n_addresses first */ | |
1365 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
1366 | bool used = false; | |
1367 | ||
1368 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1369 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
1370 | sdata->vif.addr, ETH_ALEN) == 0) { | |
1371 | used = true; | |
1372 | break; | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | if (!used) { | |
f142c6b9 | 1377 | memcpy(perm_addr, |
fa9029f8 JB |
1378 | local->hw.wiphy->addresses[i].addr, |
1379 | ETH_ALEN); | |
1380 | break; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* try mask if available */ | |
1385 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
1386 | break; | |
1387 | ||
1388 | m = local->hw.wiphy->addr_mask; | |
1389 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1390 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1391 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1392 | ||
1393 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
1394 | /* not a contiguous mask ... not handled now! */ | |
bdcbd8e0 | 1395 | pr_info("not contiguous\n"); |
fa9029f8 JB |
1396 | break; |
1397 | } | |
1398 | ||
1399 | m = local->hw.wiphy->perm_addr; | |
1400 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1401 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1402 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1403 | ||
1404 | inc = 1ULL<<__ffs64(mask); | |
1405 | val = (start & mask); | |
1406 | addr = (start & ~mask) | (val & mask); | |
1407 | do { | |
1408 | bool used = false; | |
1409 | ||
1410 | tmp_addr[5] = addr >> 0*8; | |
1411 | tmp_addr[4] = addr >> 1*8; | |
1412 | tmp_addr[3] = addr >> 2*8; | |
1413 | tmp_addr[2] = addr >> 3*8; | |
1414 | tmp_addr[1] = addr >> 4*8; | |
1415 | tmp_addr[0] = addr >> 5*8; | |
1416 | ||
1417 | val += inc; | |
1418 | ||
1419 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1420 | if (memcmp(tmp_addr, sdata->vif.addr, | |
1421 | ETH_ALEN) == 0) { | |
1422 | used = true; | |
1423 | break; | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | if (!used) { | |
f142c6b9 | 1428 | memcpy(perm_addr, tmp_addr, ETH_ALEN); |
fa9029f8 JB |
1429 | break; |
1430 | } | |
1431 | addr = (start & ~mask) | (val & mask); | |
1432 | } while (addr != start); | |
1433 | ||
1434 | break; | |
1435 | } | |
1436 | ||
6d71117a | 1437 | out_unlock: |
fa9029f8 JB |
1438 | mutex_unlock(&local->iflist_mtx); |
1439 | } | |
1440 | ||
3e122be0 | 1441 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
84efbb84 | 1442 | struct wireless_dev **new_wdev, enum nl80211_iftype type, |
ee385855 | 1443 | struct vif_params *params) |
f0706e82 | 1444 | { |
f142c6b9 | 1445 | struct net_device *ndev = NULL; |
f0706e82 | 1446 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 1447 | int ret, i; |
ded81f6b | 1448 | int txqs = 1; |
f0706e82 JB |
1449 | |
1450 | ASSERT_RTNL(); | |
75636525 | 1451 | |
f142c6b9 JB |
1452 | if (type == NL80211_IFTYPE_P2P_DEVICE) { |
1453 | struct wireless_dev *wdev; | |
1454 | ||
1455 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, | |
1456 | GFP_KERNEL); | |
1457 | if (!sdata) | |
1458 | return -ENOMEM; | |
1459 | wdev = &sdata->wdev; | |
1460 | ||
1461 | sdata->dev = NULL; | |
1462 | strlcpy(sdata->name, name, IFNAMSIZ); | |
1463 | ieee80211_assign_perm_addr(local, wdev->address, type); | |
1464 | memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); | |
1465 | } else { | |
1466 | if (local->hw.queues >= IEEE80211_NUM_ACS) | |
1467 | txqs = IEEE80211_NUM_ACS; | |
1468 | ||
1469 | ndev = alloc_netdev_mqs(sizeof(*sdata) + | |
1470 | local->hw.vif_data_size, | |
1471 | name, ieee80211_if_setup, txqs, 1); | |
1472 | if (!ndev) | |
1473 | return -ENOMEM; | |
1474 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); | |
1475 | ||
1476 | ndev->needed_headroom = local->tx_headroom + | |
1477 | 4*6 /* four MAC addresses */ | |
1478 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
1479 | + 6 /* mesh */ | |
1480 | + 8 /* rfc1042/bridge tunnel */ | |
1481 | - ETH_HLEN /* ethernet hard_header_len */ | |
1482 | + IEEE80211_ENCRYPT_HEADROOM; | |
1483 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
1484 | ||
1485 | ret = dev_alloc_name(ndev, ndev->name); | |
1486 | if (ret < 0) { | |
1487 | free_netdev(ndev); | |
1488 | return ret; | |
1489 | } | |
1490 | ||
1491 | ieee80211_assign_perm_addr(local, ndev->perm_addr, type); | |
1492 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
1493 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
1494 | ||
1495 | /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ | |
1496 | sdata = netdev_priv(ndev); | |
1497 | ndev->ieee80211_ptr = &sdata->wdev; | |
1498 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); | |
1499 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
1500 | ||
1501 | sdata->dev = ndev; | |
1502 | } | |
75636525 JB |
1503 | |
1504 | /* initialise type-independent data */ | |
f0706e82 | 1505 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 1506 | sdata->local = local; |
68542962 JO |
1507 | #ifdef CONFIG_INET |
1508 | sdata->arp_filter_state = true; | |
1509 | #endif | |
75636525 JB |
1510 | |
1511 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
1512 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
1513 | ||
1514 | INIT_LIST_HEAD(&sdata->key_list); | |
1515 | ||
37eb0b16 JM |
1516 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
1517 | struct ieee80211_supported_band *sband; | |
1518 | sband = local->hw.wiphy->bands[i]; | |
1519 | sdata->rc_rateidx_mask[i] = | |
1520 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
19468413 SW |
1521 | if (sband) |
1522 | memcpy(sdata->rc_rateidx_mcs_mask[i], | |
1523 | sband->ht_cap.mcs.rx_mask, | |
1524 | sizeof(sdata->rc_rateidx_mcs_mask[i])); | |
1525 | else | |
1526 | memset(sdata->rc_rateidx_mcs_mask[i], 0, | |
1527 | sizeof(sdata->rc_rateidx_mcs_mask[i])); | |
37eb0b16 | 1528 | } |
75636525 | 1529 | |
3a25a8c8 JB |
1530 | ieee80211_set_default_queues(sdata); |
1531 | ||
75636525 JB |
1532 | /* setup type-dependent data */ |
1533 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 1534 | |
f142c6b9 JB |
1535 | if (ndev) { |
1536 | if (params) { | |
1537 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1538 | if (type == NL80211_IFTYPE_STATION) | |
1539 | sdata->u.mgd.use_4addr = params->use_4addr; | |
1540 | } | |
9bc383de | 1541 | |
f142c6b9 | 1542 | ndev->features |= local->hw.netdev_features; |
72d78728 | 1543 | |
f142c6b9 JB |
1544 | ret = register_netdevice(ndev); |
1545 | if (ret) { | |
1546 | free_netdev(ndev); | |
1547 | return ret; | |
1548 | } | |
1549 | } | |
f0706e82 | 1550 | |
c771c9d8 | 1551 | mutex_lock(&local->iflist_mtx); |
79010420 | 1552 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1553 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1554 | |
84efbb84 JB |
1555 | if (new_wdev) |
1556 | *new_wdev = &sdata->wdev; | |
f0706e82 | 1557 | |
f0706e82 | 1558 | return 0; |
f0706e82 JB |
1559 | } |
1560 | ||
f698d856 | 1561 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1562 | { |
f0706e82 | 1563 | ASSERT_RTNL(); |
11a843b7 | 1564 | |
c771c9d8 | 1565 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1566 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1567 | mutex_unlock(&sdata->local->iflist_mtx); |
1568 | ||
75636525 | 1569 | synchronize_rcu(); |
f142c6b9 JB |
1570 | |
1571 | if (sdata->dev) { | |
1572 | unregister_netdevice(sdata->dev); | |
1573 | } else { | |
1574 | cfg80211_unregister_wdev(&sdata->wdev); | |
1575 | kfree(sdata); | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) | |
1580 | { | |
1581 | if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) | |
1582 | return; | |
1583 | ieee80211_do_stop(sdata, true); | |
1584 | ieee80211_teardown_sdata(sdata); | |
f0706e82 JB |
1585 | } |
1586 | ||
75636525 JB |
1587 | /* |
1588 | * Remove all interfaces, may only be called at hardware unregistration | |
1589 | * time because it doesn't do RCU-safe list removals. | |
1590 | */ | |
1591 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1592 | { |
75636525 | 1593 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1594 | LIST_HEAD(unreg_list); |
f142c6b9 | 1595 | LIST_HEAD(wdev_list); |
f0706e82 JB |
1596 | |
1597 | ASSERT_RTNL(); | |
1598 | ||
efe117ab | 1599 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1600 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1601 | list_del(&sdata->list); | |
c771c9d8 | 1602 | |
f142c6b9 JB |
1603 | if (sdata->dev) |
1604 | unregister_netdevice_queue(sdata->dev, &unreg_list); | |
1605 | else | |
1606 | list_add(&sdata->list, &wdev_list); | |
f0706e82 | 1607 | } |
efe117ab ED |
1608 | mutex_unlock(&local->iflist_mtx); |
1609 | unregister_netdevice_many(&unreg_list); | |
5f04d506 | 1610 | list_del(&unreg_list); |
f142c6b9 JB |
1611 | |
1612 | list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { | |
1613 | list_del(&sdata->list); | |
1614 | cfg80211_unregister_wdev(&sdata->wdev); | |
1615 | kfree(sdata); | |
1616 | } | |
f0706e82 | 1617 | } |
5cff20e6 | 1618 | |
47846c9b JB |
1619 | static int netdev_notify(struct notifier_block *nb, |
1620 | unsigned long state, | |
1621 | void *ndev) | |
1622 | { | |
1623 | struct net_device *dev = ndev; | |
1624 | struct ieee80211_sub_if_data *sdata; | |
1625 | ||
1626 | if (state != NETDEV_CHANGENAME) | |
1627 | return 0; | |
1628 | ||
1629 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1630 | return 0; | |
1631 | ||
1632 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1633 | return 0; | |
1634 | ||
1635 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1636 | ||
2f5265e6 | 1637 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1638 | |
1639 | ieee80211_debugfs_rename_netdev(sdata); | |
1640 | return 0; | |
1641 | } | |
1642 | ||
1643 | static struct notifier_block mac80211_netdev_notifier = { | |
1644 | .notifier_call = netdev_notify, | |
1645 | }; | |
1646 | ||
1647 | int ieee80211_iface_init(void) | |
1648 | { | |
1649 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1650 | } | |
1651 | ||
1652 | void ieee80211_iface_exit(void) | |
1653 | { | |
1654 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1655 | } |