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Commit | Line | Data |
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f0706e82 | 1 | /* |
c5d54fbf | 2 | * Interface handling |
0d143fe1 | 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 | ||
1ea6f9c0 JB |
45 | bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) |
46 | { | |
47 | struct ieee80211_chanctx_conf *chanctx_conf; | |
48 | int power; | |
49 | ||
50 | rcu_read_lock(); | |
51 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
52 | if (!chanctx_conf) { | |
53 | rcu_read_unlock(); | |
54 | return false; | |
55 | } | |
56 | ||
0430c883 | 57 | power = ieee80211_chandef_max_power(&chanctx_conf->def); |
1ea6f9c0 JB |
58 | rcu_read_unlock(); |
59 | ||
60 | if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) | |
61 | power = min(power, sdata->user_power_level); | |
62 | ||
63 | if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) | |
64 | power = min(power, sdata->ap_power_level); | |
65 | ||
66 | if (power != sdata->vif.bss_conf.txpower) { | |
67 | sdata->vif.bss_conf.txpower = power; | |
68 | ieee80211_hw_config(sdata->local, 0); | |
69 | return true; | |
70 | } | |
71 | ||
72 | return false; | |
73 | } | |
74 | ||
75 | void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) | |
76 | { | |
77 | if (__ieee80211_recalc_txpower(sdata)) | |
78 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); | |
79 | } | |
c771c9d8 | 80 | |
62a40a15 | 81 | static u32 __ieee80211_idle_off(struct ieee80211_local *local) |
cc45ae54 JB |
82 | { |
83 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
84 | return 0; | |
85 | ||
86 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
87 | return IEEE80211_CONF_CHANGE_IDLE; | |
88 | } | |
89 | ||
62a40a15 | 90 | static u32 __ieee80211_idle_on(struct ieee80211_local *local) |
cc45ae54 JB |
91 | { |
92 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
93 | return 0; | |
94 | ||
39ecc01d | 95 | ieee80211_flush_queues(local, NULL); |
cc45ae54 JB |
96 | |
97 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; | |
98 | return IEEE80211_CONF_CHANGE_IDLE; | |
99 | } | |
100 | ||
62a40a15 JB |
101 | static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, |
102 | bool force_active) | |
cc45ae54 | 103 | { |
fd0f979a | 104 | bool working = false, scanning, active; |
cc45ae54 JB |
105 | unsigned int led_trig_start = 0, led_trig_stop = 0; |
106 | struct ieee80211_roc_work *roc; | |
107 | ||
cc45ae54 JB |
108 | lockdep_assert_held(&local->mtx); |
109 | ||
62a40a15 JB |
110 | active = force_active || |
111 | !list_empty(&local->chanctx_list) || | |
112 | local->monitors; | |
cc45ae54 JB |
113 | |
114 | if (!local->ops->remain_on_channel) { | |
115 | list_for_each_entry(roc, &local->roc_list, list) { | |
116 | working = true; | |
fd0f979a | 117 | break; |
cc45ae54 JB |
118 | } |
119 | } | |
120 | ||
f1e3e051 JB |
121 | scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || |
122 | test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); | |
cc45ae54 | 123 | |
cc45ae54 JB |
124 | if (working || scanning) |
125 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; | |
126 | else | |
127 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; | |
128 | ||
fd0f979a | 129 | if (active) |
cc45ae54 JB |
130 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; |
131 | else | |
132 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; | |
133 | ||
134 | ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); | |
135 | ||
fd0f979a | 136 | if (working || scanning || active) |
62a40a15 JB |
137 | return __ieee80211_idle_off(local); |
138 | return __ieee80211_idle_on(local); | |
139 | } | |
140 | ||
141 | u32 ieee80211_idle_off(struct ieee80211_local *local) | |
142 | { | |
143 | return __ieee80211_recalc_idle(local, true); | |
144 | } | |
145 | ||
146 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
147 | { | |
148 | u32 change = __ieee80211_recalc_idle(local, false); | |
fd0f979a JB |
149 | if (change) |
150 | ieee80211_hw_config(local, change); | |
cc45ae54 JB |
151 | } |
152 | ||
0d143fe1 JB |
153 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
154 | { | |
09b1426e | 155 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) |
0d143fe1 | 156 | return -EINVAL; |
0d143fe1 | 157 | |
0d143fe1 JB |
158 | dev->mtu = new_mtu; |
159 | return 0; | |
160 | } | |
161 | ||
3899ba90 | 162 | static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, |
31eba5bc | 163 | bool check_dup) |
478622e8 | 164 | { |
ac20976d HS |
165 | struct ieee80211_local *local = sdata->local; |
166 | struct ieee80211_sub_if_data *iter; | |
478622e8 HS |
167 | u64 new, mask, tmp; |
168 | u8 *m; | |
169 | int ret = 0; | |
170 | ||
171 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
172 | return 0; | |
173 | ||
174 | m = addr; | |
175 | new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
176 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
177 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
178 | ||
179 | m = local->hw.wiphy->addr_mask; | |
180 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
181 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
182 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
183 | ||
31eba5bc FF |
184 | if (!check_dup) |
185 | return ret; | |
478622e8 HS |
186 | |
187 | mutex_lock(&local->iflist_mtx); | |
ac20976d HS |
188 | list_for_each_entry(iter, &local->interfaces, list) { |
189 | if (iter == sdata) | |
478622e8 HS |
190 | continue; |
191 | ||
3899ba90 JL |
192 | if (iter->vif.type == NL80211_IFTYPE_MONITOR && |
193 | !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE)) | |
478622e8 HS |
194 | continue; |
195 | ||
ac20976d | 196 | m = iter->vif.addr; |
478622e8 HS |
197 | tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
198 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
199 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
200 | ||
201 | if ((new & ~mask) != (tmp & ~mask)) { | |
202 | ret = -EINVAL; | |
203 | break; | |
204 | } | |
205 | } | |
206 | mutex_unlock(&local->iflist_mtx); | |
207 | ||
208 | return ret; | |
209 | } | |
210 | ||
47846c9b JB |
211 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
212 | { | |
213 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
fc5f7577 | 214 | struct sockaddr *sa = addr; |
31eba5bc | 215 | bool check_dup = true; |
47846c9b JB |
216 | int ret; |
217 | ||
9607e6b6 | 218 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
219 | return -EBUSY; |
220 | ||
31eba5bc FF |
221 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR && |
222 | !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) | |
223 | check_dup = false; | |
224 | ||
3899ba90 | 225 | ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); |
478622e8 HS |
226 | if (ret) |
227 | return ret; | |
228 | ||
fc5f7577 | 229 | ret = eth_mac_addr(dev, sa); |
47846c9b JB |
230 | |
231 | if (ret == 0) | |
fc5f7577 | 232 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
47846c9b JB |
233 | |
234 | return ret; | |
235 | } | |
236 | ||
0d143fe1 JB |
237 | static inline int identical_mac_addr_allowed(int type1, int type2) |
238 | { | |
239 | return type1 == NL80211_IFTYPE_MONITOR || | |
240 | type2 == NL80211_IFTYPE_MONITOR || | |
f142c6b9 JB |
241 | type1 == NL80211_IFTYPE_P2P_DEVICE || |
242 | type2 == NL80211_IFTYPE_P2P_DEVICE || | |
0d143fe1 JB |
243 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
244 | (type1 == NL80211_IFTYPE_WDS && | |
245 | (type2 == NL80211_IFTYPE_WDS || | |
246 | type2 == NL80211_IFTYPE_AP)) || | |
247 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
248 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
249 | (type2 == NL80211_IFTYPE_AP || | |
250 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
251 | } | |
252 | ||
87490f6d JB |
253 | static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, |
254 | enum nl80211_iftype iftype) | |
0d143fe1 | 255 | { |
b4a4bf5d | 256 | struct ieee80211_local *local = sdata->local; |
87490f6d | 257 | struct ieee80211_sub_if_data *nsdata; |
0d143fe1 | 258 | |
87490f6d | 259 | ASSERT_RTNL(); |
0d143fe1 JB |
260 | |
261 | /* we hold the RTNL here so can safely walk the list */ | |
262 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
371a255e | 263 | if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { |
0d143fe1 JB |
264 | /* |
265 | * Allow only a single IBSS interface to be up at any | |
266 | * time. This is restricted because beacon distribution | |
267 | * cannot work properly if both are in the same IBSS. | |
268 | * | |
269 | * To remove this restriction we'd have to disallow them | |
270 | * from setting the same SSID on different IBSS interfaces | |
271 | * belonging to the same hardware. Then, however, we're | |
272 | * faced with having to adopt two different TSF timers... | |
273 | */ | |
87490f6d | 274 | if (iftype == NL80211_IFTYPE_ADHOC && |
0d143fe1 JB |
275 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
276 | return -EBUSY; | |
73da7d5b SW |
277 | /* |
278 | * will not add another interface while any channel | |
279 | * switch is active. | |
280 | */ | |
281 | if (nsdata->vif.csa_active) | |
282 | return -EBUSY; | |
0d143fe1 JB |
283 | |
284 | /* | |
285 | * The remaining checks are only performed for interfaces | |
286 | * with the same MAC address. | |
287 | */ | |
371a255e JB |
288 | if (!ether_addr_equal(sdata->vif.addr, |
289 | nsdata->vif.addr)) | |
0d143fe1 JB |
290 | continue; |
291 | ||
292 | /* | |
293 | * check whether it may have the same address | |
294 | */ | |
87490f6d | 295 | if (!identical_mac_addr_allowed(iftype, |
0d143fe1 JB |
296 | nsdata->vif.type)) |
297 | return -ENOTUNIQ; | |
298 | ||
299 | /* | |
300 | * can only add VLANs to enabled APs | |
301 | */ | |
87490f6d | 302 | if (iftype == NL80211_IFTYPE_AP_VLAN && |
0d143fe1 JB |
303 | nsdata->vif.type == NL80211_IFTYPE_AP) |
304 | sdata->bss = &nsdata->u.ap; | |
305 | } | |
306 | } | |
307 | ||
87490f6d JB |
308 | return 0; |
309 | } | |
310 | ||
3a25a8c8 JB |
311 | static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata) |
312 | { | |
313 | int n_queues = sdata->local->hw.queues; | |
314 | int i; | |
315 | ||
0ef24e52 IP |
316 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { |
317 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
318 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == | |
319 | IEEE80211_INVAL_HW_QUEUE)) | |
320 | return -EINVAL; | |
321 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= | |
322 | n_queues)) | |
323 | return -EINVAL; | |
324 | } | |
3a25a8c8 JB |
325 | } |
326 | ||
8ffb5c00 BC |
327 | if ((sdata->vif.type != NL80211_IFTYPE_AP && |
328 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) || | |
bb3e10fb | 329 | !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) { |
3a25a8c8 JB |
330 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
331 | return 0; | |
332 | } | |
333 | ||
334 | if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) | |
335 | return -EINVAL; | |
336 | ||
337 | if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) | |
338 | return -EINVAL; | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
85416a4f CL |
343 | void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, |
344 | const int offset) | |
345 | { | |
346 | struct ieee80211_local *local = sdata->local; | |
347 | u32 flags = sdata->u.mntr_flags; | |
348 | ||
349 | #define ADJUST(_f, _s) do { \ | |
350 | if (flags & MONITOR_FLAG_##_f) \ | |
351 | local->fif_##_s += offset; \ | |
352 | } while (0) | |
353 | ||
354 | ADJUST(FCSFAIL, fcsfail); | |
355 | ADJUST(PLCPFAIL, plcpfail); | |
356 | ADJUST(CONTROL, control); | |
357 | ADJUST(CONTROL, pspoll); | |
358 | ADJUST(OTHER_BSS, other_bss); | |
359 | ||
360 | #undef ADJUST | |
361 | } | |
362 | ||
3a25a8c8 JB |
363 | static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) |
364 | { | |
365 | struct ieee80211_local *local = sdata->local; | |
366 | int i; | |
367 | ||
368 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
369 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
370 | sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; | |
a9d3c05c | 371 | else if (local->hw.queues >= IEEE80211_NUM_ACS) |
3a25a8c8 | 372 | sdata->vif.hw_queue[i] = i; |
a9d3c05c JB |
373 | else |
374 | sdata->vif.hw_queue[i] = 0; | |
3a25a8c8 JB |
375 | } |
376 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; | |
377 | } | |
378 | ||
3c3e21e7 | 379 | int ieee80211_add_virtual_monitor(struct ieee80211_local *local) |
4b6f1dd6 JB |
380 | { |
381 | struct ieee80211_sub_if_data *sdata; | |
8b305780 | 382 | int ret; |
4b6f1dd6 JB |
383 | |
384 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) | |
385 | return 0; | |
386 | ||
8b305780 | 387 | ASSERT_RTNL(); |
685fb72b | 388 | |
4b6f1dd6 | 389 | if (local->monitor_sdata) |
8b305780 | 390 | return 0; |
4b6f1dd6 JB |
391 | |
392 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); | |
8b305780 JB |
393 | if (!sdata) |
394 | return -ENOMEM; | |
4b6f1dd6 JB |
395 | |
396 | /* set up data */ | |
397 | sdata->local = local; | |
398 | sdata->vif.type = NL80211_IFTYPE_MONITOR; | |
399 | snprintf(sdata->name, IFNAMSIZ, "%s-monitor", | |
400 | wiphy_name(local->hw.wiphy)); | |
401 | ||
3a25a8c8 JB |
402 | ieee80211_set_default_queues(sdata); |
403 | ||
4b6f1dd6 JB |
404 | ret = drv_add_interface(local, sdata); |
405 | if (WARN_ON(ret)) { | |
406 | /* ok .. stupid driver, it asked for this! */ | |
407 | kfree(sdata); | |
8b305780 | 408 | return ret; |
4b6f1dd6 JB |
409 | } |
410 | ||
3a25a8c8 JB |
411 | ret = ieee80211_check_queues(sdata); |
412 | if (ret) { | |
413 | kfree(sdata); | |
8b305780 | 414 | return ret; |
3a25a8c8 JB |
415 | } |
416 | ||
4bf88530 | 417 | ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, |
55de908a JB |
418 | IEEE80211_CHANCTX_EXCLUSIVE); |
419 | if (ret) { | |
420 | drv_remove_interface(local, sdata); | |
421 | kfree(sdata); | |
8b305780 | 422 | return ret; |
55de908a JB |
423 | } |
424 | ||
8b305780 | 425 | mutex_lock(&local->iflist_mtx); |
4b6f1dd6 | 426 | rcu_assign_pointer(local->monitor_sdata, sdata); |
685fb72b | 427 | mutex_unlock(&local->iflist_mtx); |
8b305780 JB |
428 | |
429 | return 0; | |
4b6f1dd6 JB |
430 | } |
431 | ||
3c3e21e7 | 432 | void ieee80211_del_virtual_monitor(struct ieee80211_local *local) |
4b6f1dd6 JB |
433 | { |
434 | struct ieee80211_sub_if_data *sdata; | |
435 | ||
436 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) | |
437 | return; | |
438 | ||
8b305780 JB |
439 | ASSERT_RTNL(); |
440 | ||
685fb72b | 441 | mutex_lock(&local->iflist_mtx); |
4b6f1dd6 | 442 | |
685fb72b JB |
443 | sdata = rcu_dereference_protected(local->monitor_sdata, |
444 | lockdep_is_held(&local->iflist_mtx)); | |
8b305780 JB |
445 | if (!sdata) { |
446 | mutex_unlock(&local->iflist_mtx); | |
447 | return; | |
448 | } | |
4b6f1dd6 JB |
449 | |
450 | rcu_assign_pointer(local->monitor_sdata, NULL); | |
8b305780 JB |
451 | mutex_unlock(&local->iflist_mtx); |
452 | ||
4b6f1dd6 JB |
453 | synchronize_net(); |
454 | ||
55de908a JB |
455 | ieee80211_vif_release_channel(sdata); |
456 | ||
4b6f1dd6 JB |
457 | drv_remove_interface(local, sdata); |
458 | ||
459 | kfree(sdata); | |
460 | } | |
461 | ||
34d4bc4d JB |
462 | /* |
463 | * NOTE: Be very careful when changing this function, it must NOT return | |
464 | * an error on interface type changes that have been pre-checked, so most | |
465 | * checks should be in ieee80211_check_concurrent_iface. | |
466 | */ | |
f142c6b9 | 467 | int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) |
87490f6d | 468 | { |
f142c6b9 JB |
469 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); |
470 | struct net_device *dev = wdev->netdev; | |
87490f6d JB |
471 | struct ieee80211_local *local = sdata->local; |
472 | struct sta_info *sta; | |
473 | u32 changed = 0; | |
474 | int res; | |
475 | u32 hw_reconf_flags = 0; | |
476 | ||
0d143fe1 JB |
477 | switch (sdata->vif.type) { |
478 | case NL80211_IFTYPE_WDS: | |
479 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
480 | return -ENOLINK; | |
481 | break; | |
665c93a9 JB |
482 | case NL80211_IFTYPE_AP_VLAN: { |
483 | struct ieee80211_sub_if_data *master; | |
484 | ||
0d143fe1 JB |
485 | if (!sdata->bss) |
486 | return -ENOLINK; | |
665c93a9 | 487 | |
0d143fe1 | 488 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
665c93a9 JB |
489 | |
490 | master = container_of(sdata->bss, | |
491 | struct ieee80211_sub_if_data, u.ap); | |
492 | sdata->control_port_protocol = | |
493 | master->control_port_protocol; | |
494 | sdata->control_port_no_encrypt = | |
495 | master->control_port_no_encrypt; | |
1351c5d3 JB |
496 | sdata->vif.cab_queue = master->vif.cab_queue; |
497 | memcpy(sdata->vif.hw_queue, master->vif.hw_queue, | |
498 | sizeof(sdata->vif.hw_queue)); | |
0d143fe1 | 499 | break; |
665c93a9 | 500 | } |
0d143fe1 JB |
501 | case NL80211_IFTYPE_AP: |
502 | sdata->bss = &sdata->u.ap; | |
503 | break; | |
504 | case NL80211_IFTYPE_MESH_POINT: | |
0d143fe1 JB |
505 | case NL80211_IFTYPE_STATION: |
506 | case NL80211_IFTYPE_MONITOR: | |
507 | case NL80211_IFTYPE_ADHOC: | |
f142c6b9 | 508 | case NL80211_IFTYPE_P2P_DEVICE: |
0d143fe1 JB |
509 | /* no special treatment */ |
510 | break; | |
511 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 512 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
513 | case NL80211_IFTYPE_P2P_CLIENT: |
514 | case NL80211_IFTYPE_P2P_GO: | |
0d143fe1 JB |
515 | /* cannot happen */ |
516 | WARN_ON(1); | |
517 | break; | |
518 | } | |
519 | ||
520 | if (local->open_count == 0) { | |
24487981 | 521 | res = drv_start(local); |
0d143fe1 JB |
522 | if (res) |
523 | goto err_del_bss; | |
e8975581 JB |
524 | /* we're brought up, everything changes */ |
525 | hw_reconf_flags = ~0; | |
1f87f7d3 | 526 | ieee80211_led_radio(local, true); |
67408c8c JB |
527 | ieee80211_mod_tpt_led_trig(local, |
528 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
0d143fe1 JB |
529 | } |
530 | ||
531 | /* | |
bf533e0b JB |
532 | * Copy the hopefully now-present MAC address to |
533 | * this interface, if it has the special null one. | |
0d143fe1 | 534 | */ |
f142c6b9 | 535 | if (dev && is_zero_ether_addr(dev->dev_addr)) { |
bf533e0b JB |
536 | memcpy(dev->dev_addr, |
537 | local->hw.wiphy->perm_addr, | |
538 | ETH_ALEN); | |
539 | memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); | |
540 | ||
541 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
4d6c36fa JB |
542 | res = -EADDRNOTAVAIL; |
543 | goto err_stop; | |
0adc23f5 | 544 | } |
0d143fe1 JB |
545 | } |
546 | ||
0d143fe1 JB |
547 | switch (sdata->vif.type) { |
548 | case NL80211_IFTYPE_AP_VLAN: | |
4d76d21b JB |
549 | /* no need to tell driver, but set carrier and chanctx */ |
550 | if (rtnl_dereference(sdata->bss->beacon)) { | |
551 | ieee80211_vif_vlan_copy_chanctx(sdata); | |
3edaf3e6 | 552 | netif_carrier_on(dev); |
4d76d21b | 553 | } else { |
3edaf3e6 | 554 | netif_carrier_off(dev); |
4d76d21b | 555 | } |
0d143fe1 JB |
556 | break; |
557 | case NL80211_IFTYPE_MONITOR: | |
558 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
559 | local->cooked_mntrs++; | |
560 | break; | |
561 | } | |
562 | ||
31eba5bc FF |
563 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
564 | res = drv_add_interface(local, sdata); | |
565 | if (res) | |
566 | goto err_stop; | |
567 | } else if (local->monitors == 0 && local->open_count == 0) { | |
075e0847 JB |
568 | res = ieee80211_add_virtual_monitor(local); |
569 | if (res) | |
570 | goto err_stop; | |
571 | } | |
572 | ||
0d143fe1 JB |
573 | /* must be before the call to ieee80211_configure_filter */ |
574 | local->monitors++; | |
e8975581 | 575 | if (local->monitors == 1) { |
0869aea0 JB |
576 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
577 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 578 | } |
0d143fe1 | 579 | |
85416a4f | 580 | ieee80211_adjust_monitor_flags(sdata, 1); |
0d143fe1 | 581 | ieee80211_configure_filter(local); |
801d929c FF |
582 | mutex_lock(&local->mtx); |
583 | ieee80211_recalc_idle(local); | |
584 | mutex_unlock(&local->mtx); | |
53e9b1de DG |
585 | |
586 | netif_carrier_on(dev); | |
0d143fe1 | 587 | break; |
0d143fe1 | 588 | default: |
34d4bc4d | 589 | if (coming_up) { |
075e0847 JB |
590 | ieee80211_del_virtual_monitor(local); |
591 | ||
7b7eab6f | 592 | res = drv_add_interface(local, sdata); |
34d4bc4d JB |
593 | if (res) |
594 | goto err_stop; | |
3a25a8c8 JB |
595 | res = ieee80211_check_queues(sdata); |
596 | if (res) | |
597 | goto err_del_interface; | |
34d4bc4d | 598 | } |
0d143fe1 | 599 | |
29cbe68c | 600 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
e3b90ca2 | 601 | local->fif_pspoll++; |
7be5086d | 602 | local->fif_probe_req++; |
e3b90ca2 | 603 | |
e3b90ca2 | 604 | ieee80211_configure_filter(local); |
7be5086d JB |
605 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
606 | local->fif_probe_req++; | |
a3c9aa51 | 607 | } |
e3b90ca2 | 608 | |
f142c6b9 JB |
609 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) |
610 | changed |= ieee80211_reset_erp_info(sdata); | |
0d143fe1 | 611 | ieee80211_bss_info_change_notify(sdata, changed); |
0d143fe1 | 612 | |
c405c629 JB |
613 | switch (sdata->vif.type) { |
614 | case NL80211_IFTYPE_STATION: | |
615 | case NL80211_IFTYPE_ADHOC: | |
616 | case NL80211_IFTYPE_AP: | |
617 | case NL80211_IFTYPE_MESH_POINT: | |
0d143fe1 | 618 | netif_carrier_off(dev); |
c405c629 | 619 | break; |
1411af15 | 620 | case NL80211_IFTYPE_WDS: |
f142c6b9 | 621 | case NL80211_IFTYPE_P2P_DEVICE: |
1411af15 | 622 | break; |
c405c629 | 623 | default: |
a2310824 JB |
624 | /* not reached */ |
625 | WARN_ON(1); | |
c405c629 | 626 | } |
59034591 EP |
627 | |
628 | /* | |
629 | * set default queue parameters so drivers don't | |
630 | * need to initialise the hardware if the hardware | |
631 | * doesn't start up with sane defaults | |
632 | */ | |
3abead59 | 633 | ieee80211_set_wmm_default(sdata, true); |
0d143fe1 JB |
634 | } |
635 | ||
2d2080c3 JB |
636 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
637 | ||
0d143fe1 JB |
638 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
639 | /* Create STA entry for the WDS peer */ | |
640 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
641 | GFP_KERNEL); | |
642 | if (!sta) { | |
643 | res = -ENOMEM; | |
644 | goto err_del_interface; | |
645 | } | |
646 | ||
83d5cc01 JB |
647 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
648 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
649 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
0d143fe1 JB |
650 | |
651 | res = sta_info_insert(sta); | |
652 | if (res) { | |
653 | /* STA has been freed */ | |
654 | goto err_del_interface; | |
655 | } | |
1be7fe8d BJ |
656 | |
657 | rate_control_rate_init(sta); | |
1411af15 | 658 | netif_carrier_on(dev); |
f142c6b9 JB |
659 | } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
660 | rcu_assign_pointer(local->p2p_sdata, sdata); | |
0d143fe1 JB |
661 | } |
662 | ||
0d143fe1 JB |
663 | /* |
664 | * set_multicast_list will be invoked by the networking core | |
665 | * which will check whether any increments here were done in | |
666 | * error and sync them down to the hardware as filter flags. | |
667 | */ | |
668 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
669 | atomic_inc(&local->iff_allmultis); | |
670 | ||
671 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
672 | atomic_inc(&local->iff_promiscs); | |
673 | ||
34d4bc4d JB |
674 | if (coming_up) |
675 | local->open_count++; | |
676 | ||
59034591 | 677 | if (hw_reconf_flags) |
e8975581 | 678 | ieee80211_hw_config(local, hw_reconf_flags); |
0d143fe1 | 679 | |
10f644a4 | 680 | ieee80211_recalc_ps(local, -1); |
965bedad | 681 | |
2b436312 JB |
682 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
683 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
684 | /* XXX: for AP_VLAN, actually track AP queues */ | |
685 | netif_tx_start_all_queues(dev); | |
686 | } else if (dev) { | |
2b730daa JB |
687 | unsigned long flags; |
688 | int n_acs = IEEE80211_NUM_ACS; | |
689 | int ac; | |
690 | ||
691 | if (local->hw.queues < IEEE80211_NUM_ACS) | |
692 | n_acs = 1; | |
693 | ||
694 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
695 | if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || | |
696 | (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && | |
697 | skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { | |
698 | for (ac = 0; ac < n_acs; ac++) { | |
699 | int ac_queue = sdata->vif.hw_queue[ac]; | |
700 | ||
701 | if (local->queue_stop_reasons[ac_queue] == 0 && | |
702 | skb_queue_empty(&local->pending[ac_queue])) | |
703 | netif_start_subqueue(dev, ac); | |
704 | } | |
705 | } | |
706 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
707 | } | |
0d143fe1 JB |
708 | |
709 | return 0; | |
710 | err_del_interface: | |
7b7eab6f | 711 | drv_remove_interface(local, sdata); |
0d143fe1 | 712 | err_stop: |
24487981 JB |
713 | if (!local->open_count) |
714 | drv_stop(local); | |
0d143fe1 JB |
715 | err_del_bss: |
716 | sdata->bss = NULL; | |
717 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
718 | list_del(&sdata->u.vlan.list); | |
4d6c36fa | 719 | /* might already be clear but that doesn't matter */ |
2d2080c3 | 720 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
0d143fe1 JB |
721 | return res; |
722 | } | |
723 | ||
34d4bc4d | 724 | static int ieee80211_open(struct net_device *dev) |
0d143fe1 JB |
725 | { |
726 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
34d4bc4d JB |
727 | int err; |
728 | ||
729 | /* fail early if user set an invalid address */ | |
2fcf2824 | 730 | if (!is_valid_ether_addr(dev->dev_addr)) |
34d4bc4d JB |
731 | return -EADDRNOTAVAIL; |
732 | ||
733 | err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); | |
734 | if (err) | |
735 | return err; | |
736 | ||
f142c6b9 | 737 | return ieee80211_do_open(&sdata->wdev, true); |
34d4bc4d JB |
738 | } |
739 | ||
740 | static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, | |
741 | bool going_down) | |
742 | { | |
0d143fe1 | 743 | struct ieee80211_local *local = sdata->local; |
5061b0c2 JB |
744 | unsigned long flags; |
745 | struct sk_buff *skb, *tmp; | |
e8975581 | 746 | u32 hw_reconf_flags = 0; |
09f4114e | 747 | int i, flushed; |
397a7a24 | 748 | struct ps_data *ps; |
0d143fe1 | 749 | |
c29acf20 RM |
750 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
751 | ||
e2fd5dbc | 752 | if (rcu_access_pointer(local->scan_sdata) == sdata) |
352ffad6 BC |
753 | ieee80211_scan_cancel(local); |
754 | ||
0d143fe1 JB |
755 | /* |
756 | * Stop TX on this interface first. | |
757 | */ | |
f142c6b9 JB |
758 | if (sdata->dev) |
759 | netif_tx_stop_all_queues(sdata->dev); | |
0d143fe1 | 760 | |
c8f994ee | 761 | ieee80211_roc_purge(local, sdata); |
af6b6374 | 762 | |
572078be JB |
763 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
764 | ieee80211_mgd_stop(sdata); | |
765 | ||
0d143fe1 JB |
766 | /* |
767 | * Remove all stations associated with this interface. | |
768 | * | |
769 | * This must be done before calling ops->remove_interface() | |
770 | * because otherwise we can later invoke ops->sta_notify() | |
771 | * whenever the STAs are removed, and that invalidates driver | |
772 | * assumptions about always getting a vif pointer that is valid | |
773 | * (because if we remove a STA after ops->remove_interface() | |
774 | * the driver will have removed the vif info already!) | |
775 | * | |
09f4114e JB |
776 | * This is relevant only in WDS mode, in all other modes we've |
777 | * already removed all stations when disconnecting or similar, | |
778 | * so warn otherwise. | |
051007d9 JB |
779 | * |
780 | * We call sta_info_flush_cleanup() later, to combine RCU waits. | |
0d143fe1 | 781 | */ |
051007d9 | 782 | flushed = sta_info_flush_defer(sdata); |
09f4114e JB |
783 | WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || |
784 | (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)); | |
0d143fe1 | 785 | |
afdc7c18 | 786 | /* don't count this interface for promisc/allmulti while it is down */ |
0d143fe1 JB |
787 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
788 | atomic_dec(&local->iff_allmultis); | |
789 | ||
790 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
791 | atomic_dec(&local->iff_promiscs); | |
792 | ||
7be5086d | 793 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
e3b90ca2 | 794 | local->fif_pspoll--; |
7be5086d JB |
795 | local->fif_probe_req--; |
796 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
797 | local->fif_probe_req--; | |
798 | } | |
e3b90ca2 | 799 | |
f142c6b9 JB |
800 | if (sdata->dev) { |
801 | netif_addr_lock_bh(sdata->dev); | |
802 | spin_lock_bh(&local->filter_lock); | |
803 | __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, | |
804 | sdata->dev->addr_len); | |
805 | spin_unlock_bh(&local->filter_lock); | |
806 | netif_addr_unlock_bh(sdata->dev); | |
f142c6b9 | 807 | } |
3ac64bee | 808 | |
7cbf0ba5 VN |
809 | del_timer_sync(&local->dynamic_ps_timer); |
810 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 | 811 | |
04ecd257 | 812 | cancel_work_sync(&sdata->recalc_smps); |
73da7d5b SW |
813 | sdata->vif.csa_active = false; |
814 | cancel_work_sync(&sdata->csa_finalize_work); | |
04ecd257 | 815 | |
164eb02d SW |
816 | cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); |
817 | ||
818 | if (sdata->wdev.cac_started) { | |
b2c0958b | 819 | WARN_ON(local->suspended); |
164eb02d SW |
820 | mutex_lock(&local->iflist_mtx); |
821 | ieee80211_vif_release_channel(sdata); | |
822 | mutex_unlock(&local->iflist_mtx); | |
823 | cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED, | |
824 | GFP_KERNEL); | |
825 | } | |
826 | ||
0d143fe1 JB |
827 | /* APs need special treatment */ |
828 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 829 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
830 | |
831 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 832 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
833 | u.vlan.list) |
834 | dev_close(vlan->dev); | |
835 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
397a7a24 MB |
836 | } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
837 | /* remove all packets in parent bc_buf pointing to this dev */ | |
838 | ps = &sdata->bss->ps; | |
839 | ||
840 | spin_lock_irqsave(&ps->bc_buf.lock, flags); | |
841 | skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { | |
842 | if (skb->dev == sdata->dev) { | |
843 | __skb_unlink(skb, &ps->bc_buf); | |
844 | local->total_ps_buffered--; | |
845 | ieee80211_free_txskb(&local->hw, skb); | |
846 | } | |
847 | } | |
848 | spin_unlock_irqrestore(&ps->bc_buf.lock, flags); | |
0d143fe1 JB |
849 | } |
850 | ||
34d4bc4d JB |
851 | if (going_down) |
852 | local->open_count--; | |
0d143fe1 JB |
853 | |
854 | switch (sdata->vif.type) { | |
855 | case NL80211_IFTYPE_AP_VLAN: | |
856 | list_del(&sdata->u.vlan.list); | |
4d76d21b | 857 | rcu_assign_pointer(sdata->vif.chanctx_conf, NULL); |
0d143fe1 JB |
858 | /* no need to tell driver */ |
859 | break; | |
860 | case NL80211_IFTYPE_MONITOR: | |
861 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
862 | local->cooked_mntrs--; | |
863 | break; | |
864 | } | |
865 | ||
866 | local->monitors--; | |
e8975581 | 867 | if (local->monitors == 0) { |
0869aea0 JB |
868 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
869 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 870 | } |
0d143fe1 | 871 | |
85416a4f | 872 | ieee80211_adjust_monitor_flags(sdata, -1); |
0d143fe1 | 873 | break; |
f142c6b9 JB |
874 | case NL80211_IFTYPE_P2P_DEVICE: |
875 | /* relies on synchronize_rcu() below */ | |
876 | rcu_assign_pointer(local->p2p_sdata, NULL); | |
877 | /* fall through */ | |
0d143fe1 | 878 | default: |
0b7dff4f | 879 | cancel_work_sync(&sdata->work); |
35f20c14 JB |
880 | /* |
881 | * When we get here, the interface is marked down. | |
75de9113 JB |
882 | * |
883 | * sta_info_flush_cleanup() requires rcu_barrier() | |
884 | * first to wait for the station call_rcu() calls | |
8ceb5955 BC |
885 | * to complete, and we also need synchronize_rcu() |
886 | * to wait for the RX path in case it is using the | |
75de9113 JB |
887 | * interface and enqueuing frames at this very time on |
888 | * another CPU. | |
35f20c14 | 889 | */ |
8ceb5955 | 890 | synchronize_rcu(); |
75de9113 | 891 | rcu_barrier(); |
051007d9 JB |
892 | sta_info_flush_cleanup(sdata); |
893 | ||
b9dcf712 JB |
894 | /* |
895 | * Free all remaining keys, there shouldn't be any, | |
7b4396bd | 896 | * except maybe in WDS mode? |
b9dcf712 | 897 | */ |
ad0e2b5a | 898 | ieee80211_free_keys(sdata); |
b9dcf712 | 899 | |
1861b845 JB |
900 | /* fall through */ |
901 | case NL80211_IFTYPE_AP: | |
902 | skb_queue_purge(&sdata->skb_queue); | |
0d143fe1 JB |
903 | } |
904 | ||
905 | sdata->bss = NULL; | |
906 | ||
5061b0c2 JB |
907 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
908 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
909 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
910 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
911 | if (info->control.vif == &sdata->vif) { | |
912 | __skb_unlink(skb, &local->pending[i]); | |
d4fa14cd | 913 | ieee80211_free_txskb(&local->hw, skb); |
5061b0c2 JB |
914 | } |
915 | } | |
916 | } | |
917 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
075e0847 | 918 | |
b2c0958b JB |
919 | if (local->open_count == 0) |
920 | ieee80211_clear_tx_pending(local); | |
921 | ||
922 | /* | |
923 | * If the interface goes down while suspended, presumably because | |
924 | * the device was unplugged and that happens before our resume, | |
925 | * then the driver is already unconfigured and the remainder of | |
926 | * this function isn't needed. | |
927 | * XXX: what about WoWLAN? If the device has software state, e.g. | |
928 | * memory allocated, it might expect teardown commands from | |
929 | * mac80211 here? | |
930 | */ | |
931 | if (local->suspended) { | |
932 | WARN_ON(local->wowlan); | |
933 | WARN_ON(rtnl_dereference(local->monitor_sdata)); | |
934 | return; | |
935 | } | |
936 | ||
937 | switch (sdata->vif.type) { | |
938 | case NL80211_IFTYPE_AP_VLAN: | |
939 | break; | |
940 | case NL80211_IFTYPE_MONITOR: | |
941 | if (local->monitors == 0) | |
942 | ieee80211_del_virtual_monitor(local); | |
943 | ||
944 | mutex_lock(&local->mtx); | |
945 | ieee80211_recalc_idle(local); | |
946 | mutex_unlock(&local->mtx); | |
31eba5bc FF |
947 | |
948 | if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) | |
949 | break; | |
950 | ||
951 | /* fall through */ | |
b2c0958b JB |
952 | default: |
953 | if (going_down) | |
954 | drv_remove_interface(local, sdata); | |
955 | } | |
956 | ||
957 | ieee80211_recalc_ps(local, -1); | |
958 | ||
959 | if (local->open_count == 0) { | |
960 | ieee80211_stop_device(local); | |
961 | ||
962 | /* no reconfiguring after stop! */ | |
963 | return; | |
964 | } | |
965 | ||
966 | /* do after stop to avoid reconfiguring when we stop anyway */ | |
967 | ieee80211_configure_filter(local); | |
968 | ieee80211_hw_config(local, hw_reconf_flags); | |
969 | ||
970 | if (local->monitors == local->open_count) | |
075e0847 | 971 | ieee80211_add_virtual_monitor(local); |
34d4bc4d JB |
972 | } |
973 | ||
974 | static int ieee80211_stop(struct net_device *dev) | |
975 | { | |
976 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
977 | ||
978 | ieee80211_do_stop(sdata, true); | |
5061b0c2 | 979 | |
0d143fe1 JB |
980 | return 0; |
981 | } | |
982 | ||
983 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
984 | { | |
0d143fe1 | 985 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 986 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
987 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
988 | ||
989 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
990 | promisc = !!(dev->flags & IFF_PROMISC); | |
991 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
992 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
993 | ||
994 | if (allmulti != sdata_allmulti) { | |
995 | if (dev->flags & IFF_ALLMULTI) | |
996 | atomic_inc(&local->iff_allmultis); | |
997 | else | |
998 | atomic_dec(&local->iff_allmultis); | |
999 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
1000 | } | |
1001 | ||
1002 | if (promisc != sdata_promisc) { | |
1003 | if (dev->flags & IFF_PROMISC) | |
1004 | atomic_inc(&local->iff_promiscs); | |
1005 | else | |
1006 | atomic_dec(&local->iff_promiscs); | |
1007 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
1008 | } | |
488b366a AB |
1009 | |
1010 | /* | |
1011 | * TODO: If somebody needs this on AP interfaces, | |
1012 | * it can be enabled easily but multicast | |
1013 | * addresses from VLANs need to be synced. | |
1014 | */ | |
1015 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1016 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1017 | sdata->vif.type != NL80211_IFTYPE_AP) | |
1018 | drv_set_multicast_list(local, sdata, &dev->mc); | |
1019 | ||
3b8d81e0 | 1020 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 1021 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 1022 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 1023 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
1024 | } |
1025 | ||
75636525 JB |
1026 | /* |
1027 | * Called when the netdev is removed or, by the code below, before | |
1028 | * the interface type changes. | |
1029 | */ | |
f142c6b9 | 1030 | static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1031 | { |
75636525 | 1032 | int flushed; |
f0706e82 JB |
1033 | int i; |
1034 | ||
75636525 JB |
1035 | /* free extra data */ |
1036 | ieee80211_free_keys(sdata); | |
1037 | ||
aee14ceb JM |
1038 | ieee80211_debugfs_remove_netdev(sdata); |
1039 | ||
f0706e82 | 1040 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
1041 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
1042 | sdata->fragment_next = 0; | |
11a843b7 | 1043 | |
b9dcf712 JB |
1044 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1045 | mesh_rmc_free(sdata); | |
75636525 | 1046 | |
b998e8bb | 1047 | flushed = sta_info_flush(sdata); |
75636525 | 1048 | WARN_ON(flushed); |
f0706e82 JB |
1049 | } |
1050 | ||
f142c6b9 JB |
1051 | static void ieee80211_uninit(struct net_device *dev) |
1052 | { | |
1053 | ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); | |
1054 | } | |
1055 | ||
cf0277e7 JB |
1056 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
1057 | struct sk_buff *skb) | |
1058 | { | |
1059 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
1060 | } | |
1061 | ||
587e729e JB |
1062 | static const struct net_device_ops ieee80211_dataif_ops = { |
1063 | .ndo_open = ieee80211_open, | |
1064 | .ndo_stop = ieee80211_stop, | |
f142c6b9 | 1065 | .ndo_uninit = ieee80211_uninit, |
587e729e | 1066 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
afc4b13d | 1067 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
587e729e | 1068 | .ndo_change_mtu = ieee80211_change_mtu, |
47846c9b | 1069 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 1070 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
1071 | }; |
1072 | ||
cf0277e7 JB |
1073 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
1074 | struct sk_buff *skb) | |
1075 | { | |
1076 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1077 | struct ieee80211_local *local = sdata->local; | |
1078 | struct ieee80211_hdr *hdr; | |
1079 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
1080 | ||
32c5057b | 1081 | if (local->hw.queues < IEEE80211_NUM_ACS) |
cf0277e7 JB |
1082 | return 0; |
1083 | ||
1084 | if (skb->len < 4 || | |
b49bb574 | 1085 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
1086 | return 0; /* doesn't matter, frame will be dropped */ |
1087 | ||
b49bb574 | 1088 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 1089 | |
00e96dec | 1090 | return ieee80211_select_queue_80211(sdata, skb, hdr); |
cf0277e7 JB |
1091 | } |
1092 | ||
587e729e JB |
1093 | static const struct net_device_ops ieee80211_monitorif_ops = { |
1094 | .ndo_open = ieee80211_open, | |
1095 | .ndo_stop = ieee80211_stop, | |
f142c6b9 | 1096 | .ndo_uninit = ieee80211_uninit, |
587e729e | 1097 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
afc4b13d | 1098 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
587e729e | 1099 | .ndo_change_mtu = ieee80211_change_mtu, |
31eba5bc | 1100 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 1101 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
1102 | }; |
1103 | ||
1104 | static void ieee80211_if_setup(struct net_device *dev) | |
1105 | { | |
1106 | ether_setup(dev); | |
550fd08c | 1107 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
587e729e | 1108 | dev->netdev_ops = &ieee80211_dataif_ops; |
587e729e JB |
1109 | dev->destructor = free_netdev; |
1110 | } | |
1111 | ||
1fa57d01 JB |
1112 | static void ieee80211_iface_work(struct work_struct *work) |
1113 | { | |
1114 | struct ieee80211_sub_if_data *sdata = | |
1115 | container_of(work, struct ieee80211_sub_if_data, work); | |
1116 | struct ieee80211_local *local = sdata->local; | |
1117 | struct sk_buff *skb; | |
344eec67 | 1118 | struct sta_info *sta; |
c1475ca9 | 1119 | struct ieee80211_ra_tid *ra_tid; |
1fa57d01 JB |
1120 | |
1121 | if (!ieee80211_sdata_running(sdata)) | |
1122 | return; | |
1123 | ||
1124 | if (local->scanning) | |
1125 | return; | |
1126 | ||
1127 | /* | |
1128 | * ieee80211_queue_work() should have picked up most cases, | |
1129 | * here we'll pick the rest. | |
1130 | */ | |
1131 | if (WARN(local->suspended, | |
1132 | "interface work scheduled while going to suspend\n")) | |
1133 | return; | |
1134 | ||
1135 | /* first process frames */ | |
1136 | while ((skb = skb_dequeue(&sdata->skb_queue))) { | |
bed7ee6e JB |
1137 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
1138 | ||
c1475ca9 JB |
1139 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
1140 | ra_tid = (void *)&skb->cb; | |
1141 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
1142 | ra_tid->tid); | |
1143 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { | |
1144 | ra_tid = (void *)&skb->cb; | |
1145 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
1146 | ra_tid->tid); | |
1147 | } else if (ieee80211_is_action(mgmt->frame_control) && | |
1148 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { | |
bed7ee6e | 1149 | int len = skb->len; |
bed7ee6e | 1150 | |
a93e3644 | 1151 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 1152 | sta = sta_info_get_bss(sdata, mgmt->sa); |
bed7ee6e JB |
1153 | if (sta) { |
1154 | switch (mgmt->u.action.u.addba_req.action_code) { | |
1155 | case WLAN_ACTION_ADDBA_REQ: | |
1156 | ieee80211_process_addba_request( | |
1157 | local, sta, mgmt, len); | |
1158 | break; | |
1159 | case WLAN_ACTION_ADDBA_RESP: | |
1160 | ieee80211_process_addba_resp(local, sta, | |
1161 | mgmt, len); | |
1162 | break; | |
1163 | case WLAN_ACTION_DELBA: | |
1164 | ieee80211_process_delba(sdata, sta, | |
1165 | mgmt, len); | |
1166 | break; | |
1167 | default: | |
1168 | WARN_ON(1); | |
1169 | break; | |
1170 | } | |
1171 | } | |
a93e3644 | 1172 | mutex_unlock(&local->sta_mtx); |
344eec67 JB |
1173 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
1174 | struct ieee80211_hdr *hdr = (void *)mgmt; | |
1175 | /* | |
1176 | * So the frame isn't mgmt, but frame_control | |
1177 | * is at the right place anyway, of course, so | |
1178 | * the if statement is correct. | |
1179 | * | |
1180 | * Warn if we have other data frame types here, | |
1181 | * they must not get here. | |
1182 | */ | |
1183 | WARN_ON(hdr->frame_control & | |
1184 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); | |
1185 | WARN_ON(!(hdr->seq_ctrl & | |
1186 | cpu_to_le16(IEEE80211_SCTL_FRAG))); | |
1187 | /* | |
1188 | * This was a fragment of a frame, received while | |
1189 | * a block-ack session was active. That cannot be | |
1190 | * right, so terminate the session. | |
1191 | */ | |
a93e3644 | 1192 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 1193 | sta = sta_info_get_bss(sdata, mgmt->sa); |
344eec67 JB |
1194 | if (sta) { |
1195 | u16 tid = *ieee80211_get_qos_ctl(hdr) & | |
1196 | IEEE80211_QOS_CTL_TID_MASK; | |
1197 | ||
1198 | __ieee80211_stop_rx_ba_session( | |
1199 | sta, tid, WLAN_BACK_RECIPIENT, | |
53f73c09 JB |
1200 | WLAN_REASON_QSTA_REQUIRE_SETUP, |
1201 | true); | |
344eec67 | 1202 | } |
a93e3644 | 1203 | mutex_unlock(&local->sta_mtx); |
bed7ee6e | 1204 | } else switch (sdata->vif.type) { |
1fa57d01 JB |
1205 | case NL80211_IFTYPE_STATION: |
1206 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
1207 | break; | |
1208 | case NL80211_IFTYPE_ADHOC: | |
1209 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
1210 | break; | |
1211 | case NL80211_IFTYPE_MESH_POINT: | |
1212 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
1213 | break; | |
1214 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
1215 | break; | |
1216 | default: | |
1217 | WARN(1, "frame for unexpected interface type"); | |
1fa57d01 JB |
1218 | break; |
1219 | } | |
36b3a628 JB |
1220 | |
1221 | kfree_skb(skb); | |
1fa57d01 JB |
1222 | } |
1223 | ||
1224 | /* then other type-dependent work */ | |
1225 | switch (sdata->vif.type) { | |
1226 | case NL80211_IFTYPE_STATION: | |
1227 | ieee80211_sta_work(sdata); | |
1228 | break; | |
1229 | case NL80211_IFTYPE_ADHOC: | |
1230 | ieee80211_ibss_work(sdata); | |
1231 | break; | |
1232 | case NL80211_IFTYPE_MESH_POINT: | |
1233 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
1234 | break; | |
1235 | ieee80211_mesh_work(sdata); | |
1236 | break; | |
1237 | default: | |
1238 | break; | |
1239 | } | |
1240 | } | |
1241 | ||
04ecd257 JB |
1242 | static void ieee80211_recalc_smps_work(struct work_struct *work) |
1243 | { | |
1244 | struct ieee80211_sub_if_data *sdata = | |
1245 | container_of(work, struct ieee80211_sub_if_data, recalc_smps); | |
1246 | ||
1247 | ieee80211_recalc_smps(sdata); | |
1248 | } | |
1fa57d01 | 1249 | |
75636525 JB |
1250 | /* |
1251 | * Helper function to initialise an interface to a specific type. | |
1252 | */ | |
1253 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 1254 | enum nl80211_iftype type) |
f0706e82 | 1255 | { |
75636525 JB |
1256 | /* clear type-dependent union */ |
1257 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
1258 | ||
1259 | /* and set some type-dependent values */ | |
1260 | sdata->vif.type = type; | |
2ca27bcf | 1261 | sdata->vif.p2p = false; |
60719ffd | 1262 | sdata->wdev.iftype = type; |
75636525 | 1263 | |
a621fa4d JB |
1264 | sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
1265 | sdata->control_port_no_encrypt = false; | |
1266 | ||
b53be792 SW |
1267 | sdata->noack_map = 0; |
1268 | ||
f142c6b9 JB |
1269 | /* only monitor/p2p-device differ */ |
1270 | if (sdata->dev) { | |
1271 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; | |
1272 | sdata->dev->type = ARPHRD_ETHER; | |
1273 | } | |
75636525 | 1274 | |
35f20c14 | 1275 | skb_queue_head_init(&sdata->skb_queue); |
1fa57d01 | 1276 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
04ecd257 | 1277 | INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); |
73da7d5b | 1278 | INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); |
35f20c14 | 1279 | |
75636525 | 1280 | switch (type) { |
2ca27bcf JB |
1281 | case NL80211_IFTYPE_P2P_GO: |
1282 | type = NL80211_IFTYPE_AP; | |
1283 | sdata->vif.type = type; | |
1284 | sdata->vif.p2p = true; | |
1285 | /* fall through */ | |
05c914fe | 1286 | case NL80211_IFTYPE_AP: |
d012a605 | 1287 | skb_queue_head_init(&sdata->u.ap.ps.bc_buf); |
75636525 | 1288 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
ad2d223a | 1289 | sdata->vif.bss_conf.bssid = sdata->vif.addr; |
75636525 | 1290 | break; |
2ca27bcf JB |
1291 | case NL80211_IFTYPE_P2P_CLIENT: |
1292 | type = NL80211_IFTYPE_STATION; | |
1293 | sdata->vif.type = type; | |
1294 | sdata->vif.p2p = true; | |
1295 | /* fall through */ | |
05c914fe | 1296 | case NL80211_IFTYPE_STATION: |
ad2d223a | 1297 | sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; |
9c6bd790 | 1298 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 1299 | break; |
46900298 | 1300 | case NL80211_IFTYPE_ADHOC: |
ad2d223a | 1301 | sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; |
46900298 JB |
1302 | ieee80211_ibss_setup_sdata(sdata); |
1303 | break; | |
05c914fe | 1304 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
1305 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1306 | ieee80211_mesh_init_sdata(sdata); | |
1307 | break; | |
05c914fe | 1308 | case NL80211_IFTYPE_MONITOR: |
75636525 | 1309 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 1310 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
1311 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
1312 | MONITOR_FLAG_OTHER_BSS; | |
1313 | break; | |
05c914fe | 1314 | case NL80211_IFTYPE_WDS: |
ad2d223a JB |
1315 | sdata->vif.bss_conf.bssid = NULL; |
1316 | break; | |
05c914fe | 1317 | case NL80211_IFTYPE_AP_VLAN: |
ad2d223a | 1318 | break; |
98104fde | 1319 | case NL80211_IFTYPE_P2P_DEVICE: |
ad2d223a | 1320 | sdata->vif.bss_conf.bssid = sdata->vif.addr; |
f142c6b9 | 1321 | break; |
05c914fe | 1322 | case NL80211_IFTYPE_UNSPECIFIED: |
2e161f78 | 1323 | case NUM_NL80211_IFTYPES: |
75636525 JB |
1324 | BUG(); |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | ieee80211_debugfs_add_netdev(sdata); | |
1329 | } | |
1330 | ||
34d4bc4d JB |
1331 | static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
1332 | enum nl80211_iftype type) | |
1333 | { | |
1334 | struct ieee80211_local *local = sdata->local; | |
1335 | int ret, err; | |
2ca27bcf JB |
1336 | enum nl80211_iftype internal_type = type; |
1337 | bool p2p = false; | |
34d4bc4d JB |
1338 | |
1339 | ASSERT_RTNL(); | |
1340 | ||
1341 | if (!local->ops->change_interface) | |
1342 | return -EBUSY; | |
1343 | ||
1344 | switch (sdata->vif.type) { | |
1345 | case NL80211_IFTYPE_AP: | |
1346 | case NL80211_IFTYPE_STATION: | |
1347 | case NL80211_IFTYPE_ADHOC: | |
1348 | /* | |
1349 | * Could maybe also all others here? | |
1350 | * Just not sure how that interacts | |
1351 | * with the RX/config path e.g. for | |
1352 | * mesh. | |
1353 | */ | |
1354 | break; | |
1355 | default: | |
1356 | return -EBUSY; | |
1357 | } | |
1358 | ||
1359 | switch (type) { | |
1360 | case NL80211_IFTYPE_AP: | |
1361 | case NL80211_IFTYPE_STATION: | |
1362 | case NL80211_IFTYPE_ADHOC: | |
1363 | /* | |
1364 | * Could probably support everything | |
1365 | * but WDS here (WDS do_open can fail | |
1366 | * under memory pressure, which this | |
1367 | * code isn't prepared to handle). | |
1368 | */ | |
1369 | break; | |
2ca27bcf JB |
1370 | case NL80211_IFTYPE_P2P_CLIENT: |
1371 | p2p = true; | |
1372 | internal_type = NL80211_IFTYPE_STATION; | |
1373 | break; | |
1374 | case NL80211_IFTYPE_P2P_GO: | |
1375 | p2p = true; | |
1376 | internal_type = NL80211_IFTYPE_AP; | |
1377 | break; | |
34d4bc4d JB |
1378 | default: |
1379 | return -EBUSY; | |
1380 | } | |
1381 | ||
2ca27bcf | 1382 | ret = ieee80211_check_concurrent_iface(sdata, internal_type); |
34d4bc4d JB |
1383 | if (ret) |
1384 | return ret; | |
1385 | ||
1386 | ieee80211_do_stop(sdata, false); | |
1387 | ||
f142c6b9 | 1388 | ieee80211_teardown_sdata(sdata); |
34d4bc4d | 1389 | |
2ca27bcf | 1390 | ret = drv_change_interface(local, sdata, internal_type, p2p); |
34d4bc4d JB |
1391 | if (ret) |
1392 | type = sdata->vif.type; | |
1393 | ||
3a25a8c8 JB |
1394 | /* |
1395 | * Ignore return value here, there's not much we can do since | |
1396 | * the driver changed the interface type internally already. | |
1397 | * The warnings will hopefully make driver authors fix it :-) | |
1398 | */ | |
1399 | ieee80211_check_queues(sdata); | |
1400 | ||
34d4bc4d JB |
1401 | ieee80211_setup_sdata(sdata, type); |
1402 | ||
f142c6b9 | 1403 | err = ieee80211_do_open(&sdata->wdev, false); |
34d4bc4d JB |
1404 | WARN(err, "type change: do_open returned %d", err); |
1405 | ||
1406 | return ret; | |
1407 | } | |
1408 | ||
f3947e2d | 1409 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 1410 | enum nl80211_iftype type) |
75636525 | 1411 | { |
34d4bc4d JB |
1412 | int ret; |
1413 | ||
f3947e2d JB |
1414 | ASSERT_RTNL(); |
1415 | ||
2ca27bcf | 1416 | if (type == ieee80211_vif_type_p2p(&sdata->vif)) |
f3947e2d JB |
1417 | return 0; |
1418 | ||
34d4bc4d JB |
1419 | if (ieee80211_sdata_running(sdata)) { |
1420 | ret = ieee80211_runtime_change_iftype(sdata, type); | |
1421 | if (ret) | |
1422 | return ret; | |
1423 | } else { | |
1424 | /* Purge and reset type-dependent state. */ | |
f142c6b9 | 1425 | ieee80211_teardown_sdata(sdata); |
34d4bc4d JB |
1426 | ieee80211_setup_sdata(sdata, type); |
1427 | } | |
75636525 JB |
1428 | |
1429 | /* reset some values that shouldn't be kept across type changes */ | |
75636525 | 1430 | sdata->drop_unencrypted = 0; |
9bc383de JB |
1431 | if (type == NL80211_IFTYPE_STATION) |
1432 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
1433 | |
1434 | return 0; | |
f0706e82 JB |
1435 | } |
1436 | ||
fa9029f8 | 1437 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
f142c6b9 | 1438 | u8 *perm_addr, enum nl80211_iftype type) |
fa9029f8 JB |
1439 | { |
1440 | struct ieee80211_sub_if_data *sdata; | |
1441 | u64 mask, start, addr, val, inc; | |
1442 | u8 *m; | |
1443 | u8 tmp_addr[ETH_ALEN]; | |
1444 | int i; | |
1445 | ||
1446 | /* default ... something at least */ | |
f142c6b9 | 1447 | memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
fa9029f8 JB |
1448 | |
1449 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
1450 | local->hw.wiphy->n_addresses <= 1) | |
1451 | return; | |
1452 | ||
fa9029f8 JB |
1453 | mutex_lock(&local->iflist_mtx); |
1454 | ||
1455 | switch (type) { | |
1456 | case NL80211_IFTYPE_MONITOR: | |
1457 | /* doesn't matter */ | |
1458 | break; | |
1459 | case NL80211_IFTYPE_WDS: | |
1460 | case NL80211_IFTYPE_AP_VLAN: | |
1461 | /* match up with an AP interface */ | |
1462 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1463 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1464 | continue; | |
f142c6b9 | 1465 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
fa9029f8 JB |
1466 | break; |
1467 | } | |
1468 | /* keep default if no AP interface present */ | |
1469 | break; | |
6d71117a JB |
1470 | case NL80211_IFTYPE_P2P_CLIENT: |
1471 | case NL80211_IFTYPE_P2P_GO: | |
1472 | if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) { | |
1473 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1474 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) | |
1475 | continue; | |
1476 | if (!ieee80211_sdata_running(sdata)) | |
1477 | continue; | |
1478 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); | |
1479 | goto out_unlock; | |
1480 | } | |
1481 | } | |
1482 | /* otherwise fall through */ | |
fa9029f8 JB |
1483 | default: |
1484 | /* assign a new address if possible -- try n_addresses first */ | |
1485 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
1486 | bool used = false; | |
1487 | ||
1488 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1489 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
1490 | sdata->vif.addr, ETH_ALEN) == 0) { | |
1491 | used = true; | |
1492 | break; | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | if (!used) { | |
f142c6b9 | 1497 | memcpy(perm_addr, |
fa9029f8 JB |
1498 | local->hw.wiphy->addresses[i].addr, |
1499 | ETH_ALEN); | |
1500 | break; | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | /* try mask if available */ | |
1505 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
1506 | break; | |
1507 | ||
1508 | m = local->hw.wiphy->addr_mask; | |
1509 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1510 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1511 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1512 | ||
1513 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
1514 | /* not a contiguous mask ... not handled now! */ | |
bdcbd8e0 | 1515 | pr_info("not contiguous\n"); |
fa9029f8 JB |
1516 | break; |
1517 | } | |
1518 | ||
ac20976d HS |
1519 | /* |
1520 | * Pick address of existing interface in case user changed | |
1521 | * MAC address manually, default to perm_addr. | |
1522 | */ | |
fa9029f8 | 1523 | m = local->hw.wiphy->perm_addr; |
ac20976d HS |
1524 | list_for_each_entry(sdata, &local->interfaces, list) { |
1525 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) | |
1526 | continue; | |
1527 | m = sdata->vif.addr; | |
1528 | break; | |
1529 | } | |
fa9029f8 JB |
1530 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
1531 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1532 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1533 | ||
1534 | inc = 1ULL<<__ffs64(mask); | |
1535 | val = (start & mask); | |
1536 | addr = (start & ~mask) | (val & mask); | |
1537 | do { | |
1538 | bool used = false; | |
1539 | ||
1540 | tmp_addr[5] = addr >> 0*8; | |
1541 | tmp_addr[4] = addr >> 1*8; | |
1542 | tmp_addr[3] = addr >> 2*8; | |
1543 | tmp_addr[2] = addr >> 3*8; | |
1544 | tmp_addr[1] = addr >> 4*8; | |
1545 | tmp_addr[0] = addr >> 5*8; | |
1546 | ||
1547 | val += inc; | |
1548 | ||
1549 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1550 | if (memcmp(tmp_addr, sdata->vif.addr, | |
1551 | ETH_ALEN) == 0) { | |
1552 | used = true; | |
1553 | break; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | if (!used) { | |
f142c6b9 | 1558 | memcpy(perm_addr, tmp_addr, ETH_ALEN); |
fa9029f8 JB |
1559 | break; |
1560 | } | |
1561 | addr = (start & ~mask) | (val & mask); | |
1562 | } while (addr != start); | |
1563 | ||
1564 | break; | |
1565 | } | |
1566 | ||
6d71117a | 1567 | out_unlock: |
fa9029f8 JB |
1568 | mutex_unlock(&local->iflist_mtx); |
1569 | } | |
1570 | ||
97f97b1f JB |
1571 | static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk) |
1572 | { | |
1573 | struct ieee80211_sub_if_data *sdata; | |
1574 | ||
1575 | sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk); | |
1576 | ||
1577 | ieee80211_cleanup_sdata_stas(sdata); | |
1578 | } | |
1579 | ||
3e122be0 | 1580 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
84efbb84 | 1581 | struct wireless_dev **new_wdev, enum nl80211_iftype type, |
ee385855 | 1582 | struct vif_params *params) |
f0706e82 | 1583 | { |
f142c6b9 | 1584 | struct net_device *ndev = NULL; |
f0706e82 | 1585 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 1586 | int ret, i; |
ded81f6b | 1587 | int txqs = 1; |
f0706e82 JB |
1588 | |
1589 | ASSERT_RTNL(); | |
75636525 | 1590 | |
f142c6b9 JB |
1591 | if (type == NL80211_IFTYPE_P2P_DEVICE) { |
1592 | struct wireless_dev *wdev; | |
1593 | ||
1594 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, | |
1595 | GFP_KERNEL); | |
1596 | if (!sdata) | |
1597 | return -ENOMEM; | |
1598 | wdev = &sdata->wdev; | |
1599 | ||
1600 | sdata->dev = NULL; | |
1601 | strlcpy(sdata->name, name, IFNAMSIZ); | |
1602 | ieee80211_assign_perm_addr(local, wdev->address, type); | |
1603 | memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); | |
1604 | } else { | |
1605 | if (local->hw.queues >= IEEE80211_NUM_ACS) | |
1606 | txqs = IEEE80211_NUM_ACS; | |
1607 | ||
1608 | ndev = alloc_netdev_mqs(sizeof(*sdata) + | |
1609 | local->hw.vif_data_size, | |
1610 | name, ieee80211_if_setup, txqs, 1); | |
1611 | if (!ndev) | |
1612 | return -ENOMEM; | |
1613 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); | |
1614 | ||
1615 | ndev->needed_headroom = local->tx_headroom + | |
1616 | 4*6 /* four MAC addresses */ | |
1617 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
1618 | + 6 /* mesh */ | |
1619 | + 8 /* rfc1042/bridge tunnel */ | |
1620 | - ETH_HLEN /* ethernet hard_header_len */ | |
1621 | + IEEE80211_ENCRYPT_HEADROOM; | |
1622 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
1623 | ||
1624 | ret = dev_alloc_name(ndev, ndev->name); | |
1625 | if (ret < 0) { | |
1626 | free_netdev(ndev); | |
1627 | return ret; | |
1628 | } | |
1629 | ||
1630 | ieee80211_assign_perm_addr(local, ndev->perm_addr, type); | |
1631 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
1632 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
1633 | ||
1634 | /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ | |
1635 | sdata = netdev_priv(ndev); | |
1636 | ndev->ieee80211_ptr = &sdata->wdev; | |
1637 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); | |
1638 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
1639 | ||
1640 | sdata->dev = ndev; | |
1641 | } | |
75636525 JB |
1642 | |
1643 | /* initialise type-independent data */ | |
f0706e82 | 1644 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 1645 | sdata->local = local; |
75636525 JB |
1646 | |
1647 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
1648 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
1649 | ||
1650 | INIT_LIST_HEAD(&sdata->key_list); | |
1651 | ||
97f97b1f JB |
1652 | spin_lock_init(&sdata->cleanup_stations_lock); |
1653 | INIT_LIST_HEAD(&sdata->cleanup_stations); | |
1654 | INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk); | |
164eb02d SW |
1655 | INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, |
1656 | ieee80211_dfs_cac_timer_work); | |
8d1f7ecd JB |
1657 | INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, |
1658 | ieee80211_delayed_tailroom_dec); | |
97f97b1f | 1659 | |
37eb0b16 JM |
1660 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
1661 | struct ieee80211_supported_band *sband; | |
1662 | sband = local->hw.wiphy->bands[i]; | |
1663 | sdata->rc_rateidx_mask[i] = | |
1664 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
19468413 SW |
1665 | if (sband) |
1666 | memcpy(sdata->rc_rateidx_mcs_mask[i], | |
1667 | sband->ht_cap.mcs.rx_mask, | |
1668 | sizeof(sdata->rc_rateidx_mcs_mask[i])); | |
1669 | else | |
1670 | memset(sdata->rc_rateidx_mcs_mask[i], 0, | |
1671 | sizeof(sdata->rc_rateidx_mcs_mask[i])); | |
37eb0b16 | 1672 | } |
75636525 | 1673 | |
3a25a8c8 JB |
1674 | ieee80211_set_default_queues(sdata); |
1675 | ||
1ea6f9c0 JB |
1676 | sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
1677 | sdata->user_power_level = local->user_power_level; | |
1678 | ||
75636525 JB |
1679 | /* setup type-dependent data */ |
1680 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 1681 | |
f142c6b9 JB |
1682 | if (ndev) { |
1683 | if (params) { | |
1684 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1685 | if (type == NL80211_IFTYPE_STATION) | |
1686 | sdata->u.mgd.use_4addr = params->use_4addr; | |
1687 | } | |
9bc383de | 1688 | |
f142c6b9 | 1689 | ndev->features |= local->hw.netdev_features; |
72d78728 | 1690 | |
f142c6b9 JB |
1691 | ret = register_netdevice(ndev); |
1692 | if (ret) { | |
1693 | free_netdev(ndev); | |
1694 | return ret; | |
1695 | } | |
1696 | } | |
f0706e82 | 1697 | |
c771c9d8 | 1698 | mutex_lock(&local->iflist_mtx); |
79010420 | 1699 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1700 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1701 | |
84efbb84 JB |
1702 | if (new_wdev) |
1703 | *new_wdev = &sdata->wdev; | |
f0706e82 | 1704 | |
f0706e82 | 1705 | return 0; |
f0706e82 JB |
1706 | } |
1707 | ||
f698d856 | 1708 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1709 | { |
f0706e82 | 1710 | ASSERT_RTNL(); |
11a843b7 | 1711 | |
c771c9d8 | 1712 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1713 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1714 | mutex_unlock(&sdata->local->iflist_mtx); |
1715 | ||
75636525 | 1716 | synchronize_rcu(); |
f142c6b9 JB |
1717 | |
1718 | if (sdata->dev) { | |
1719 | unregister_netdevice(sdata->dev); | |
1720 | } else { | |
1721 | cfg80211_unregister_wdev(&sdata->wdev); | |
1722 | kfree(sdata); | |
1723 | } | |
1724 | } | |
1725 | ||
1726 | void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) | |
1727 | { | |
1728 | if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) | |
1729 | return; | |
1730 | ieee80211_do_stop(sdata, true); | |
1731 | ieee80211_teardown_sdata(sdata); | |
f0706e82 JB |
1732 | } |
1733 | ||
75636525 JB |
1734 | /* |
1735 | * Remove all interfaces, may only be called at hardware unregistration | |
1736 | * time because it doesn't do RCU-safe list removals. | |
1737 | */ | |
1738 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1739 | { |
75636525 | 1740 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1741 | LIST_HEAD(unreg_list); |
f142c6b9 | 1742 | LIST_HEAD(wdev_list); |
f0706e82 JB |
1743 | |
1744 | ASSERT_RTNL(); | |
1745 | ||
c8aa22db JB |
1746 | /* |
1747 | * Close all AP_VLAN interfaces first, as otherwise they | |
1748 | * might be closed while the AP interface they belong to | |
1749 | * is closed, causing unregister_netdevice_many() to crash. | |
1750 | */ | |
1751 | list_for_each_entry(sdata, &local->interfaces, list) | |
1752 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1753 | dev_close(sdata->dev); | |
1754 | ||
efe117ab | 1755 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1756 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1757 | list_del(&sdata->list); | |
c771c9d8 | 1758 | |
f142c6b9 JB |
1759 | if (sdata->dev) |
1760 | unregister_netdevice_queue(sdata->dev, &unreg_list); | |
1761 | else | |
1762 | list_add(&sdata->list, &wdev_list); | |
f0706e82 | 1763 | } |
efe117ab ED |
1764 | mutex_unlock(&local->iflist_mtx); |
1765 | unregister_netdevice_many(&unreg_list); | |
5f04d506 | 1766 | list_del(&unreg_list); |
f142c6b9 JB |
1767 | |
1768 | list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { | |
1769 | list_del(&sdata->list); | |
1770 | cfg80211_unregister_wdev(&sdata->wdev); | |
1771 | kfree(sdata); | |
1772 | } | |
f0706e82 | 1773 | } |
5cff20e6 | 1774 | |
47846c9b | 1775 | static int netdev_notify(struct notifier_block *nb, |
351638e7 | 1776 | unsigned long state, void *ptr) |
47846c9b | 1777 | { |
351638e7 | 1778 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
47846c9b JB |
1779 | struct ieee80211_sub_if_data *sdata; |
1780 | ||
1781 | if (state != NETDEV_CHANGENAME) | |
1782 | return 0; | |
1783 | ||
1784 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1785 | return 0; | |
1786 | ||
1787 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1788 | return 0; | |
1789 | ||
1790 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1791 | ||
2f5265e6 | 1792 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1793 | |
1794 | ieee80211_debugfs_rename_netdev(sdata); | |
1795 | return 0; | |
1796 | } | |
1797 | ||
1798 | static struct notifier_block mac80211_netdev_notifier = { | |
1799 | .notifier_call = netdev_notify, | |
1800 | }; | |
1801 | ||
1802 | int ieee80211_iface_init(void) | |
1803 | { | |
1804 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1805 | } | |
1806 | ||
1807 | void ieee80211_iface_exit(void) | |
1808 | { | |
1809 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1810 | } |