Commit | Line | Data |
---|---|---|
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 | { |
1d5e1266 | 104 | bool working, scanning, active; |
cc45ae54 | 105 | unsigned int led_trig_start = 0, led_trig_stop = 0; |
cc45ae54 | 106 | |
cc45ae54 JB |
107 | lockdep_assert_held(&local->mtx); |
108 | ||
62a40a15 JB |
109 | active = force_active || |
110 | !list_empty(&local->chanctx_list) || | |
111 | local->monitors; | |
cc45ae54 | 112 | |
1d5e1266 JB |
113 | working = !local->ops->remain_on_channel && |
114 | !list_empty(&local->roc_list); | |
cc45ae54 | 115 | |
f1e3e051 JB |
116 | scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || |
117 | test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); | |
cc45ae54 | 118 | |
cc45ae54 JB |
119 | if (working || scanning) |
120 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; | |
121 | else | |
122 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; | |
123 | ||
fd0f979a | 124 | if (active) |
cc45ae54 JB |
125 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; |
126 | else | |
127 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; | |
128 | ||
129 | ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); | |
130 | ||
fd0f979a | 131 | if (working || scanning || active) |
62a40a15 JB |
132 | return __ieee80211_idle_off(local); |
133 | return __ieee80211_idle_on(local); | |
134 | } | |
135 | ||
136 | u32 ieee80211_idle_off(struct ieee80211_local *local) | |
137 | { | |
138 | return __ieee80211_recalc_idle(local, true); | |
139 | } | |
140 | ||
141 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
142 | { | |
143 | u32 change = __ieee80211_recalc_idle(local, false); | |
fd0f979a JB |
144 | if (change) |
145 | ieee80211_hw_config(local, change); | |
cc45ae54 JB |
146 | } |
147 | ||
0d143fe1 JB |
148 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
149 | { | |
09b1426e | 150 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) |
0d143fe1 | 151 | return -EINVAL; |
0d143fe1 | 152 | |
0d143fe1 JB |
153 | dev->mtu = new_mtu; |
154 | return 0; | |
155 | } | |
156 | ||
3899ba90 | 157 | static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, |
31eba5bc | 158 | bool check_dup) |
478622e8 | 159 | { |
ac20976d HS |
160 | struct ieee80211_local *local = sdata->local; |
161 | struct ieee80211_sub_if_data *iter; | |
478622e8 HS |
162 | u64 new, mask, tmp; |
163 | u8 *m; | |
164 | int ret = 0; | |
165 | ||
166 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
167 | return 0; | |
168 | ||
169 | m = addr; | |
170 | new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
171 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
172 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
173 | ||
174 | m = local->hw.wiphy->addr_mask; | |
175 | mask = ((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 | ||
31eba5bc FF |
179 | if (!check_dup) |
180 | return ret; | |
478622e8 HS |
181 | |
182 | mutex_lock(&local->iflist_mtx); | |
ac20976d HS |
183 | list_for_each_entry(iter, &local->interfaces, list) { |
184 | if (iter == sdata) | |
478622e8 HS |
185 | continue; |
186 | ||
3899ba90 JL |
187 | if (iter->vif.type == NL80211_IFTYPE_MONITOR && |
188 | !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE)) | |
478622e8 HS |
189 | continue; |
190 | ||
ac20976d | 191 | m = iter->vif.addr; |
478622e8 HS |
192 | tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
193 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
194 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
195 | ||
196 | if ((new & ~mask) != (tmp & ~mask)) { | |
197 | ret = -EINVAL; | |
198 | break; | |
199 | } | |
200 | } | |
201 | mutex_unlock(&local->iflist_mtx); | |
202 | ||
203 | return ret; | |
204 | } | |
205 | ||
47846c9b JB |
206 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
207 | { | |
208 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
fc5f7577 | 209 | struct sockaddr *sa = addr; |
31eba5bc | 210 | bool check_dup = true; |
47846c9b JB |
211 | int ret; |
212 | ||
9607e6b6 | 213 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
214 | return -EBUSY; |
215 | ||
31eba5bc FF |
216 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR && |
217 | !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) | |
218 | check_dup = false; | |
219 | ||
3899ba90 | 220 | ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); |
478622e8 HS |
221 | if (ret) |
222 | return ret; | |
223 | ||
fc5f7577 | 224 | ret = eth_mac_addr(dev, sa); |
47846c9b JB |
225 | |
226 | if (ret == 0) | |
fc5f7577 | 227 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
47846c9b JB |
228 | |
229 | return ret; | |
230 | } | |
231 | ||
0d143fe1 JB |
232 | static inline int identical_mac_addr_allowed(int type1, int type2) |
233 | { | |
234 | return type1 == NL80211_IFTYPE_MONITOR || | |
235 | type2 == NL80211_IFTYPE_MONITOR || | |
f142c6b9 JB |
236 | type1 == NL80211_IFTYPE_P2P_DEVICE || |
237 | type2 == NL80211_IFTYPE_P2P_DEVICE || | |
0d143fe1 JB |
238 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
239 | (type1 == NL80211_IFTYPE_WDS && | |
240 | (type2 == NL80211_IFTYPE_WDS || | |
241 | type2 == NL80211_IFTYPE_AP)) || | |
242 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
243 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
244 | (type2 == NL80211_IFTYPE_AP || | |
245 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
246 | } | |
247 | ||
87490f6d JB |
248 | static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, |
249 | enum nl80211_iftype iftype) | |
0d143fe1 | 250 | { |
b4a4bf5d | 251 | struct ieee80211_local *local = sdata->local; |
87490f6d | 252 | struct ieee80211_sub_if_data *nsdata; |
b6a55015 | 253 | int ret; |
0d143fe1 | 254 | |
87490f6d | 255 | ASSERT_RTNL(); |
0d143fe1 JB |
256 | |
257 | /* we hold the RTNL here so can safely walk the list */ | |
258 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
371a255e | 259 | if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { |
0d143fe1 JB |
260 | /* |
261 | * Allow only a single IBSS interface to be up at any | |
262 | * time. This is restricted because beacon distribution | |
263 | * cannot work properly if both are in the same IBSS. | |
264 | * | |
265 | * To remove this restriction we'd have to disallow them | |
266 | * from setting the same SSID on different IBSS interfaces | |
267 | * belonging to the same hardware. Then, however, we're | |
268 | * faced with having to adopt two different TSF timers... | |
269 | */ | |
87490f6d | 270 | if (iftype == NL80211_IFTYPE_ADHOC && |
0d143fe1 JB |
271 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
272 | return -EBUSY; | |
73da7d5b SW |
273 | /* |
274 | * will not add another interface while any channel | |
275 | * switch is active. | |
276 | */ | |
277 | if (nsdata->vif.csa_active) | |
278 | return -EBUSY; | |
0d143fe1 JB |
279 | |
280 | /* | |
281 | * The remaining checks are only performed for interfaces | |
282 | * with the same MAC address. | |
283 | */ | |
371a255e JB |
284 | if (!ether_addr_equal(sdata->vif.addr, |
285 | nsdata->vif.addr)) | |
0d143fe1 JB |
286 | continue; |
287 | ||
288 | /* | |
289 | * check whether it may have the same address | |
290 | */ | |
87490f6d | 291 | if (!identical_mac_addr_allowed(iftype, |
0d143fe1 JB |
292 | nsdata->vif.type)) |
293 | return -ENOTUNIQ; | |
294 | ||
295 | /* | |
296 | * can only add VLANs to enabled APs | |
297 | */ | |
87490f6d | 298 | if (iftype == NL80211_IFTYPE_AP_VLAN && |
0d143fe1 JB |
299 | nsdata->vif.type == NL80211_IFTYPE_AP) |
300 | sdata->bss = &nsdata->u.ap; | |
301 | } | |
302 | } | |
303 | ||
b6a55015 LC |
304 | mutex_lock(&local->chanctx_mtx); |
305 | ret = ieee80211_check_combinations(sdata, NULL, 0, 0); | |
306 | mutex_unlock(&local->chanctx_mtx); | |
307 | return ret; | |
87490f6d JB |
308 | } |
309 | ||
a9865538 JB |
310 | static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, |
311 | enum nl80211_iftype iftype) | |
3a25a8c8 JB |
312 | { |
313 | int n_queues = sdata->local->hw.queues; | |
314 | int i; | |
315 | ||
a9865538 | 316 | if (iftype != NL80211_IFTYPE_P2P_DEVICE) { |
0ef24e52 IP |
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 | ||
a9865538 JB |
327 | if ((iftype != NL80211_IFTYPE_AP && |
328 | iftype != NL80211_IFTYPE_P2P_GO && | |
329 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
bb3e10fb | 330 | !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) { |
3a25a8c8 JB |
331 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
332 | return 0; | |
333 | } | |
334 | ||
335 | if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) | |
336 | return -EINVAL; | |
337 | ||
338 | if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) | |
339 | return -EINVAL; | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
85416a4f CL |
344 | void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, |
345 | const int offset) | |
346 | { | |
347 | struct ieee80211_local *local = sdata->local; | |
348 | u32 flags = sdata->u.mntr_flags; | |
349 | ||
350 | #define ADJUST(_f, _s) do { \ | |
351 | if (flags & MONITOR_FLAG_##_f) \ | |
352 | local->fif_##_s += offset; \ | |
353 | } while (0) | |
354 | ||
355 | ADJUST(FCSFAIL, fcsfail); | |
356 | ADJUST(PLCPFAIL, plcpfail); | |
357 | ADJUST(CONTROL, control); | |
358 | ADJUST(CONTROL, pspoll); | |
359 | ADJUST(OTHER_BSS, other_bss); | |
360 | ||
361 | #undef ADJUST | |
362 | } | |
363 | ||
3a25a8c8 JB |
364 | static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) |
365 | { | |
366 | struct ieee80211_local *local = sdata->local; | |
367 | int i; | |
368 | ||
369 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
370 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
371 | sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; | |
a9d3c05c | 372 | else if (local->hw.queues >= IEEE80211_NUM_ACS) |
3a25a8c8 | 373 | sdata->vif.hw_queue[i] = i; |
a9d3c05c JB |
374 | else |
375 | sdata->vif.hw_queue[i] = 0; | |
3a25a8c8 JB |
376 | } |
377 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; | |
378 | } | |
379 | ||
3c3e21e7 | 380 | int ieee80211_add_virtual_monitor(struct ieee80211_local *local) |
4b6f1dd6 JB |
381 | { |
382 | struct ieee80211_sub_if_data *sdata; | |
8b305780 | 383 | int ret; |
4b6f1dd6 JB |
384 | |
385 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) | |
386 | return 0; | |
387 | ||
8b305780 | 388 | ASSERT_RTNL(); |
685fb72b | 389 | |
4b6f1dd6 | 390 | if (local->monitor_sdata) |
8b305780 | 391 | return 0; |
4b6f1dd6 JB |
392 | |
393 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); | |
8b305780 JB |
394 | if (!sdata) |
395 | return -ENOMEM; | |
4b6f1dd6 JB |
396 | |
397 | /* set up data */ | |
398 | sdata->local = local; | |
399 | sdata->vif.type = NL80211_IFTYPE_MONITOR; | |
400 | snprintf(sdata->name, IFNAMSIZ, "%s-monitor", | |
401 | wiphy_name(local->hw.wiphy)); | |
34171dc0 | 402 | sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; |
4b6f1dd6 | 403 | |
2475b1cc MS |
404 | sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
405 | ||
3a25a8c8 JB |
406 | ieee80211_set_default_queues(sdata); |
407 | ||
4b6f1dd6 JB |
408 | ret = drv_add_interface(local, sdata); |
409 | if (WARN_ON(ret)) { | |
410 | /* ok .. stupid driver, it asked for this! */ | |
411 | kfree(sdata); | |
8b305780 | 412 | return ret; |
4b6f1dd6 JB |
413 | } |
414 | ||
a9865538 | 415 | ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); |
3a25a8c8 JB |
416 | if (ret) { |
417 | kfree(sdata); | |
8b305780 | 418 | return ret; |
3a25a8c8 JB |
419 | } |
420 | ||
fab57a6c JB |
421 | mutex_lock(&local->iflist_mtx); |
422 | rcu_assign_pointer(local->monitor_sdata, sdata); | |
423 | mutex_unlock(&local->iflist_mtx); | |
424 | ||
34a3740d | 425 | mutex_lock(&local->mtx); |
4bf88530 | 426 | ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, |
55de908a | 427 | IEEE80211_CHANCTX_EXCLUSIVE); |
34a3740d | 428 | mutex_unlock(&local->mtx); |
55de908a | 429 | if (ret) { |
fab57a6c | 430 | mutex_lock(&local->iflist_mtx); |
0c2bef46 | 431 | RCU_INIT_POINTER(local->monitor_sdata, NULL); |
fab57a6c JB |
432 | mutex_unlock(&local->iflist_mtx); |
433 | synchronize_net(); | |
55de908a JB |
434 | drv_remove_interface(local, sdata); |
435 | kfree(sdata); | |
8b305780 | 436 | return ret; |
55de908a JB |
437 | } |
438 | ||
8b305780 | 439 | return 0; |
4b6f1dd6 JB |
440 | } |
441 | ||
3c3e21e7 | 442 | void ieee80211_del_virtual_monitor(struct ieee80211_local *local) |
4b6f1dd6 JB |
443 | { |
444 | struct ieee80211_sub_if_data *sdata; | |
445 | ||
446 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) | |
447 | return; | |
448 | ||
8b305780 JB |
449 | ASSERT_RTNL(); |
450 | ||
685fb72b | 451 | mutex_lock(&local->iflist_mtx); |
4b6f1dd6 | 452 | |
685fb72b JB |
453 | sdata = rcu_dereference_protected(local->monitor_sdata, |
454 | lockdep_is_held(&local->iflist_mtx)); | |
8b305780 JB |
455 | if (!sdata) { |
456 | mutex_unlock(&local->iflist_mtx); | |
457 | return; | |
458 | } | |
4b6f1dd6 | 459 | |
0c2bef46 | 460 | RCU_INIT_POINTER(local->monitor_sdata, NULL); |
8b305780 JB |
461 | mutex_unlock(&local->iflist_mtx); |
462 | ||
4b6f1dd6 JB |
463 | synchronize_net(); |
464 | ||
34a3740d | 465 | mutex_lock(&local->mtx); |
55de908a | 466 | ieee80211_vif_release_channel(sdata); |
34a3740d | 467 | mutex_unlock(&local->mtx); |
55de908a | 468 | |
4b6f1dd6 JB |
469 | drv_remove_interface(local, sdata); |
470 | ||
471 | kfree(sdata); | |
472 | } | |
473 | ||
34d4bc4d JB |
474 | /* |
475 | * NOTE: Be very careful when changing this function, it must NOT return | |
476 | * an error on interface type changes that have been pre-checked, so most | |
477 | * checks should be in ieee80211_check_concurrent_iface. | |
478 | */ | |
f142c6b9 | 479 | int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) |
87490f6d | 480 | { |
f142c6b9 JB |
481 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); |
482 | struct net_device *dev = wdev->netdev; | |
87490f6d JB |
483 | struct ieee80211_local *local = sdata->local; |
484 | struct sta_info *sta; | |
485 | u32 changed = 0; | |
486 | int res; | |
487 | u32 hw_reconf_flags = 0; | |
488 | ||
0d143fe1 JB |
489 | switch (sdata->vif.type) { |
490 | case NL80211_IFTYPE_WDS: | |
491 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
492 | return -ENOLINK; | |
493 | break; | |
665c93a9 JB |
494 | case NL80211_IFTYPE_AP_VLAN: { |
495 | struct ieee80211_sub_if_data *master; | |
496 | ||
0d143fe1 JB |
497 | if (!sdata->bss) |
498 | return -ENOLINK; | |
665c93a9 | 499 | |
4e141dad | 500 | mutex_lock(&local->mtx); |
0d143fe1 | 501 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
4e141dad | 502 | mutex_unlock(&local->mtx); |
665c93a9 JB |
503 | |
504 | master = container_of(sdata->bss, | |
505 | struct ieee80211_sub_if_data, u.ap); | |
506 | sdata->control_port_protocol = | |
507 | master->control_port_protocol; | |
508 | sdata->control_port_no_encrypt = | |
509 | master->control_port_no_encrypt; | |
1351c5d3 JB |
510 | sdata->vif.cab_queue = master->vif.cab_queue; |
511 | memcpy(sdata->vif.hw_queue, master->vif.hw_queue, | |
512 | sizeof(sdata->vif.hw_queue)); | |
0d143fe1 | 513 | break; |
665c93a9 | 514 | } |
0d143fe1 JB |
515 | case NL80211_IFTYPE_AP: |
516 | sdata->bss = &sdata->u.ap; | |
517 | break; | |
518 | case NL80211_IFTYPE_MESH_POINT: | |
0d143fe1 JB |
519 | case NL80211_IFTYPE_STATION: |
520 | case NL80211_IFTYPE_MONITOR: | |
521 | case NL80211_IFTYPE_ADHOC: | |
f142c6b9 | 522 | case NL80211_IFTYPE_P2P_DEVICE: |
0d143fe1 JB |
523 | /* no special treatment */ |
524 | break; | |
525 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 526 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
527 | case NL80211_IFTYPE_P2P_CLIENT: |
528 | case NL80211_IFTYPE_P2P_GO: | |
0d143fe1 JB |
529 | /* cannot happen */ |
530 | WARN_ON(1); | |
531 | break; | |
532 | } | |
533 | ||
534 | if (local->open_count == 0) { | |
24487981 | 535 | res = drv_start(local); |
0d143fe1 JB |
536 | if (res) |
537 | goto err_del_bss; | |
e8975581 JB |
538 | /* we're brought up, everything changes */ |
539 | hw_reconf_flags = ~0; | |
1f87f7d3 | 540 | ieee80211_led_radio(local, true); |
67408c8c JB |
541 | ieee80211_mod_tpt_led_trig(local, |
542 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
0d143fe1 JB |
543 | } |
544 | ||
545 | /* | |
bf533e0b JB |
546 | * Copy the hopefully now-present MAC address to |
547 | * this interface, if it has the special null one. | |
0d143fe1 | 548 | */ |
f142c6b9 | 549 | if (dev && is_zero_ether_addr(dev->dev_addr)) { |
bf533e0b JB |
550 | memcpy(dev->dev_addr, |
551 | local->hw.wiphy->perm_addr, | |
552 | ETH_ALEN); | |
553 | memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); | |
554 | ||
555 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
4d6c36fa JB |
556 | res = -EADDRNOTAVAIL; |
557 | goto err_stop; | |
0adc23f5 | 558 | } |
0d143fe1 JB |
559 | } |
560 | ||
0d143fe1 JB |
561 | switch (sdata->vif.type) { |
562 | case NL80211_IFTYPE_AP_VLAN: | |
4d76d21b JB |
563 | /* no need to tell driver, but set carrier and chanctx */ |
564 | if (rtnl_dereference(sdata->bss->beacon)) { | |
565 | ieee80211_vif_vlan_copy_chanctx(sdata); | |
3edaf3e6 | 566 | netif_carrier_on(dev); |
4d76d21b | 567 | } else { |
3edaf3e6 | 568 | netif_carrier_off(dev); |
4d76d21b | 569 | } |
0d143fe1 JB |
570 | break; |
571 | case NL80211_IFTYPE_MONITOR: | |
572 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
573 | local->cooked_mntrs++; | |
574 | break; | |
575 | } | |
576 | ||
31eba5bc FF |
577 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
578 | res = drv_add_interface(local, sdata); | |
579 | if (res) | |
580 | goto err_stop; | |
581 | } else if (local->monitors == 0 && local->open_count == 0) { | |
075e0847 JB |
582 | res = ieee80211_add_virtual_monitor(local); |
583 | if (res) | |
584 | goto err_stop; | |
585 | } | |
586 | ||
0d143fe1 JB |
587 | /* must be before the call to ieee80211_configure_filter */ |
588 | local->monitors++; | |
e8975581 | 589 | if (local->monitors == 1) { |
0869aea0 JB |
590 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
591 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 592 | } |
0d143fe1 | 593 | |
85416a4f | 594 | ieee80211_adjust_monitor_flags(sdata, 1); |
0d143fe1 | 595 | ieee80211_configure_filter(local); |
801d929c FF |
596 | mutex_lock(&local->mtx); |
597 | ieee80211_recalc_idle(local); | |
598 | mutex_unlock(&local->mtx); | |
53e9b1de DG |
599 | |
600 | netif_carrier_on(dev); | |
0d143fe1 | 601 | break; |
0d143fe1 | 602 | default: |
34d4bc4d | 603 | if (coming_up) { |
075e0847 JB |
604 | ieee80211_del_virtual_monitor(local); |
605 | ||
7b7eab6f | 606 | res = drv_add_interface(local, sdata); |
34d4bc4d JB |
607 | if (res) |
608 | goto err_stop; | |
a9865538 JB |
609 | res = ieee80211_check_queues(sdata, |
610 | ieee80211_vif_type_p2p(&sdata->vif)); | |
3a25a8c8 JB |
611 | if (res) |
612 | goto err_del_interface; | |
34d4bc4d | 613 | } |
0d143fe1 | 614 | |
29cbe68c | 615 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
e3b90ca2 | 616 | local->fif_pspoll++; |
7be5086d | 617 | local->fif_probe_req++; |
e3b90ca2 | 618 | |
e3b90ca2 | 619 | ieee80211_configure_filter(local); |
7be5086d JB |
620 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
621 | local->fif_probe_req++; | |
a3c9aa51 | 622 | } |
e3b90ca2 | 623 | |
f142c6b9 JB |
624 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) |
625 | changed |= ieee80211_reset_erp_info(sdata); | |
0d143fe1 | 626 | ieee80211_bss_info_change_notify(sdata, changed); |
0d143fe1 | 627 | |
c405c629 JB |
628 | switch (sdata->vif.type) { |
629 | case NL80211_IFTYPE_STATION: | |
630 | case NL80211_IFTYPE_ADHOC: | |
631 | case NL80211_IFTYPE_AP: | |
632 | case NL80211_IFTYPE_MESH_POINT: | |
0d143fe1 | 633 | netif_carrier_off(dev); |
c405c629 | 634 | break; |
1411af15 | 635 | case NL80211_IFTYPE_WDS: |
f142c6b9 | 636 | case NL80211_IFTYPE_P2P_DEVICE: |
1411af15 | 637 | break; |
c405c629 | 638 | default: |
a2310824 JB |
639 | /* not reached */ |
640 | WARN_ON(1); | |
c405c629 | 641 | } |
59034591 EP |
642 | |
643 | /* | |
644 | * set default queue parameters so drivers don't | |
645 | * need to initialise the hardware if the hardware | |
646 | * doesn't start up with sane defaults | |
647 | */ | |
3abead59 | 648 | ieee80211_set_wmm_default(sdata, true); |
0d143fe1 JB |
649 | } |
650 | ||
2d2080c3 JB |
651 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
652 | ||
0d143fe1 JB |
653 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
654 | /* Create STA entry for the WDS peer */ | |
655 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
656 | GFP_KERNEL); | |
657 | if (!sta) { | |
658 | res = -ENOMEM; | |
659 | goto err_del_interface; | |
660 | } | |
661 | ||
83d5cc01 JB |
662 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
663 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
664 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
0d143fe1 JB |
665 | |
666 | res = sta_info_insert(sta); | |
667 | if (res) { | |
668 | /* STA has been freed */ | |
669 | goto err_del_interface; | |
670 | } | |
1be7fe8d BJ |
671 | |
672 | rate_control_rate_init(sta); | |
1411af15 | 673 | netif_carrier_on(dev); |
f142c6b9 JB |
674 | } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
675 | rcu_assign_pointer(local->p2p_sdata, sdata); | |
0d143fe1 JB |
676 | } |
677 | ||
0d143fe1 JB |
678 | /* |
679 | * set_multicast_list will be invoked by the networking core | |
680 | * which will check whether any increments here were done in | |
681 | * error and sync them down to the hardware as filter flags. | |
682 | */ | |
683 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
684 | atomic_inc(&local->iff_allmultis); | |
685 | ||
686 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
687 | atomic_inc(&local->iff_promiscs); | |
688 | ||
34d4bc4d JB |
689 | if (coming_up) |
690 | local->open_count++; | |
691 | ||
59034591 | 692 | if (hw_reconf_flags) |
e8975581 | 693 | ieee80211_hw_config(local, hw_reconf_flags); |
0d143fe1 | 694 | |
10f644a4 | 695 | ieee80211_recalc_ps(local, -1); |
965bedad | 696 | |
2b436312 JB |
697 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
698 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
699 | /* XXX: for AP_VLAN, actually track AP queues */ | |
700 | netif_tx_start_all_queues(dev); | |
701 | } else if (dev) { | |
2b730daa JB |
702 | unsigned long flags; |
703 | int n_acs = IEEE80211_NUM_ACS; | |
704 | int ac; | |
705 | ||
706 | if (local->hw.queues < IEEE80211_NUM_ACS) | |
707 | n_acs = 1; | |
708 | ||
709 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
710 | if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || | |
711 | (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && | |
712 | skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { | |
713 | for (ac = 0; ac < n_acs; ac++) { | |
714 | int ac_queue = sdata->vif.hw_queue[ac]; | |
715 | ||
716 | if (local->queue_stop_reasons[ac_queue] == 0 && | |
717 | skb_queue_empty(&local->pending[ac_queue])) | |
718 | netif_start_subqueue(dev, ac); | |
719 | } | |
720 | } | |
721 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
722 | } | |
0d143fe1 JB |
723 | |
724 | return 0; | |
725 | err_del_interface: | |
7b7eab6f | 726 | drv_remove_interface(local, sdata); |
0d143fe1 | 727 | err_stop: |
24487981 JB |
728 | if (!local->open_count) |
729 | drv_stop(local); | |
0d143fe1 JB |
730 | err_del_bss: |
731 | sdata->bss = NULL; | |
4e141dad MK |
732 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
733 | mutex_lock(&local->mtx); | |
0d143fe1 | 734 | list_del(&sdata->u.vlan.list); |
4e141dad MK |
735 | mutex_unlock(&local->mtx); |
736 | } | |
4d6c36fa | 737 | /* might already be clear but that doesn't matter */ |
2d2080c3 | 738 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
0d143fe1 JB |
739 | return res; |
740 | } | |
741 | ||
34d4bc4d | 742 | static int ieee80211_open(struct net_device *dev) |
0d143fe1 JB |
743 | { |
744 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
34d4bc4d JB |
745 | int err; |
746 | ||
747 | /* fail early if user set an invalid address */ | |
2fcf2824 | 748 | if (!is_valid_ether_addr(dev->dev_addr)) |
34d4bc4d JB |
749 | return -EADDRNOTAVAIL; |
750 | ||
751 | err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); | |
752 | if (err) | |
753 | return err; | |
754 | ||
f142c6b9 | 755 | return ieee80211_do_open(&sdata->wdev, true); |
34d4bc4d JB |
756 | } |
757 | ||
758 | static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, | |
759 | bool going_down) | |
760 | { | |
0d143fe1 | 761 | struct ieee80211_local *local = sdata->local; |
5061b0c2 JB |
762 | unsigned long flags; |
763 | struct sk_buff *skb, *tmp; | |
e8975581 | 764 | u32 hw_reconf_flags = 0; |
09f4114e | 765 | int i, flushed; |
397a7a24 | 766 | struct ps_data *ps; |
d2859df5 | 767 | struct cfg80211_chan_def chandef; |
0d143fe1 | 768 | |
c29acf20 RM |
769 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
770 | ||
e2fd5dbc | 771 | if (rcu_access_pointer(local->scan_sdata) == sdata) |
352ffad6 BC |
772 | ieee80211_scan_cancel(local); |
773 | ||
0d143fe1 JB |
774 | /* |
775 | * Stop TX on this interface first. | |
776 | */ | |
f142c6b9 JB |
777 | if (sdata->dev) |
778 | netif_tx_stop_all_queues(sdata->dev); | |
0d143fe1 | 779 | |
c8f994ee | 780 | ieee80211_roc_purge(local, sdata); |
af6b6374 | 781 | |
8ffcc704 EG |
782 | switch (sdata->vif.type) { |
783 | case NL80211_IFTYPE_STATION: | |
572078be | 784 | ieee80211_mgd_stop(sdata); |
8ffcc704 EG |
785 | break; |
786 | case NL80211_IFTYPE_ADHOC: | |
cd7760e6 | 787 | ieee80211_ibss_stop(sdata); |
8ffcc704 EG |
788 | break; |
789 | case NL80211_IFTYPE_AP: | |
790 | cancel_work_sync(&sdata->u.ap.request_smps_work); | |
791 | break; | |
792 | default: | |
793 | break; | |
794 | } | |
cd7760e6 | 795 | |
0d143fe1 JB |
796 | /* |
797 | * Remove all stations associated with this interface. | |
798 | * | |
799 | * This must be done before calling ops->remove_interface() | |
800 | * because otherwise we can later invoke ops->sta_notify() | |
801 | * whenever the STAs are removed, and that invalidates driver | |
802 | * assumptions about always getting a vif pointer that is valid | |
803 | * (because if we remove a STA after ops->remove_interface() | |
804 | * the driver will have removed the vif info already!) | |
805 | * | |
09f4114e JB |
806 | * This is relevant only in WDS mode, in all other modes we've |
807 | * already removed all stations when disconnecting or similar, | |
808 | * so warn otherwise. | |
0d143fe1 | 809 | */ |
d34ba216 | 810 | flushed = sta_info_flush(sdata); |
09f4114e JB |
811 | WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || |
812 | (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)); | |
0d143fe1 | 813 | |
afdc7c18 | 814 | /* don't count this interface for promisc/allmulti while it is down */ |
0d143fe1 JB |
815 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
816 | atomic_dec(&local->iff_allmultis); | |
817 | ||
818 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
819 | atomic_dec(&local->iff_promiscs); | |
820 | ||
7be5086d | 821 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
e3b90ca2 | 822 | local->fif_pspoll--; |
7be5086d JB |
823 | local->fif_probe_req--; |
824 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
825 | local->fif_probe_req--; | |
826 | } | |
e3b90ca2 | 827 | |
f142c6b9 JB |
828 | if (sdata->dev) { |
829 | netif_addr_lock_bh(sdata->dev); | |
830 | spin_lock_bh(&local->filter_lock); | |
831 | __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, | |
832 | sdata->dev->addr_len); | |
833 | spin_unlock_bh(&local->filter_lock); | |
834 | netif_addr_unlock_bh(sdata->dev); | |
f142c6b9 | 835 | } |
3ac64bee | 836 | |
7cbf0ba5 VN |
837 | del_timer_sync(&local->dynamic_ps_timer); |
838 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 | 839 | |
04ecd257 | 840 | cancel_work_sync(&sdata->recalc_smps); |
dbd72850 | 841 | sdata_lock(sdata); |
59af6928 | 842 | mutex_lock(&local->mtx); |
73da7d5b | 843 | sdata->vif.csa_active = false; |
59af6928 MK |
844 | if (!ieee80211_csa_needs_block_tx(local)) |
845 | ieee80211_wake_queues_by_reason(&local->hw, | |
846 | IEEE80211_MAX_QUEUE_MAP, | |
cca07b00 LC |
847 | IEEE80211_QUEUE_STOP_REASON_CSA, |
848 | false); | |
59af6928 | 849 | mutex_unlock(&local->mtx); |
dbd72850 | 850 | sdata_unlock(sdata); |
59af6928 | 851 | |
73da7d5b | 852 | cancel_work_sync(&sdata->csa_finalize_work); |
04ecd257 | 853 | |
164eb02d SW |
854 | cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); |
855 | ||
856 | if (sdata->wdev.cac_started) { | |
d2859df5 | 857 | chandef = sdata->vif.bss_conf.chandef; |
b2c0958b | 858 | WARN_ON(local->suspended); |
34a3740d | 859 | mutex_lock(&local->mtx); |
164eb02d | 860 | ieee80211_vif_release_channel(sdata); |
34a3740d | 861 | mutex_unlock(&local->mtx); |
d2859df5 JD |
862 | cfg80211_cac_event(sdata->dev, &chandef, |
863 | NL80211_RADAR_CAC_ABORTED, | |
164eb02d SW |
864 | GFP_KERNEL); |
865 | } | |
866 | ||
0d143fe1 JB |
867 | /* APs need special treatment */ |
868 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 869 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
870 | |
871 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 872 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
873 | u.vlan.list) |
874 | dev_close(vlan->dev); | |
875 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
397a7a24 MB |
876 | } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
877 | /* remove all packets in parent bc_buf pointing to this dev */ | |
878 | ps = &sdata->bss->ps; | |
879 | ||
880 | spin_lock_irqsave(&ps->bc_buf.lock, flags); | |
881 | skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { | |
882 | if (skb->dev == sdata->dev) { | |
883 | __skb_unlink(skb, &ps->bc_buf); | |
884 | local->total_ps_buffered--; | |
885 | ieee80211_free_txskb(&local->hw, skb); | |
886 | } | |
887 | } | |
888 | spin_unlock_irqrestore(&ps->bc_buf.lock, flags); | |
0d143fe1 JB |
889 | } |
890 | ||
34d4bc4d JB |
891 | if (going_down) |
892 | local->open_count--; | |
0d143fe1 JB |
893 | |
894 | switch (sdata->vif.type) { | |
895 | case NL80211_IFTYPE_AP_VLAN: | |
4e141dad | 896 | mutex_lock(&local->mtx); |
0d143fe1 | 897 | list_del(&sdata->u.vlan.list); |
4e141dad | 898 | mutex_unlock(&local->mtx); |
0c2bef46 | 899 | RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); |
0d143fe1 JB |
900 | /* no need to tell driver */ |
901 | break; | |
902 | case NL80211_IFTYPE_MONITOR: | |
903 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
904 | local->cooked_mntrs--; | |
905 | break; | |
906 | } | |
907 | ||
908 | local->monitors--; | |
e8975581 | 909 | if (local->monitors == 0) { |
0869aea0 JB |
910 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
911 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 912 | } |
0d143fe1 | 913 | |
85416a4f | 914 | ieee80211_adjust_monitor_flags(sdata, -1); |
0d143fe1 | 915 | break; |
f142c6b9 JB |
916 | case NL80211_IFTYPE_P2P_DEVICE: |
917 | /* relies on synchronize_rcu() below */ | |
0c2bef46 | 918 | RCU_INIT_POINTER(local->p2p_sdata, NULL); |
f142c6b9 | 919 | /* fall through */ |
0d143fe1 | 920 | default: |
0b7dff4f | 921 | cancel_work_sync(&sdata->work); |
35f20c14 JB |
922 | /* |
923 | * When we get here, the interface is marked down. | |
7907c7d3 JB |
924 | * Free the remaining keys, if there are any |
925 | * (shouldn't be, except maybe in WDS mode?) | |
75de9113 | 926 | * |
7907c7d3 JB |
927 | * Force the key freeing to always synchronize_net() |
928 | * to wait for the RX path in case it is using this | |
929 | * interface enqueuing frames * at this very time on | |
75de9113 | 930 | * another CPU. |
35f20c14 | 931 | */ |
7907c7d3 | 932 | ieee80211_free_keys(sdata, true); |
b9dcf712 | 933 | |
1861b845 JB |
934 | /* fall through */ |
935 | case NL80211_IFTYPE_AP: | |
936 | skb_queue_purge(&sdata->skb_queue); | |
0d143fe1 JB |
937 | } |
938 | ||
939 | sdata->bss = NULL; | |
940 | ||
5061b0c2 JB |
941 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
942 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
943 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
944 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
945 | if (info->control.vif == &sdata->vif) { | |
946 | __skb_unlink(skb, &local->pending[i]); | |
d4fa14cd | 947 | ieee80211_free_txskb(&local->hw, skb); |
5061b0c2 JB |
948 | } |
949 | } | |
950 | } | |
951 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
075e0847 | 952 | |
b2c0958b JB |
953 | if (local->open_count == 0) |
954 | ieee80211_clear_tx_pending(local); | |
955 | ||
956 | /* | |
957 | * If the interface goes down while suspended, presumably because | |
958 | * the device was unplugged and that happens before our resume, | |
959 | * then the driver is already unconfigured and the remainder of | |
960 | * this function isn't needed. | |
961 | * XXX: what about WoWLAN? If the device has software state, e.g. | |
962 | * memory allocated, it might expect teardown commands from | |
963 | * mac80211 here? | |
964 | */ | |
965 | if (local->suspended) { | |
966 | WARN_ON(local->wowlan); | |
967 | WARN_ON(rtnl_dereference(local->monitor_sdata)); | |
968 | return; | |
969 | } | |
970 | ||
971 | switch (sdata->vif.type) { | |
972 | case NL80211_IFTYPE_AP_VLAN: | |
973 | break; | |
974 | case NL80211_IFTYPE_MONITOR: | |
975 | if (local->monitors == 0) | |
976 | ieee80211_del_virtual_monitor(local); | |
977 | ||
978 | mutex_lock(&local->mtx); | |
979 | ieee80211_recalc_idle(local); | |
980 | mutex_unlock(&local->mtx); | |
31eba5bc FF |
981 | |
982 | if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) | |
983 | break; | |
984 | ||
985 | /* fall through */ | |
b2c0958b JB |
986 | default: |
987 | if (going_down) | |
988 | drv_remove_interface(local, sdata); | |
989 | } | |
990 | ||
991 | ieee80211_recalc_ps(local, -1); | |
992 | ||
993 | if (local->open_count == 0) { | |
994 | ieee80211_stop_device(local); | |
995 | ||
996 | /* no reconfiguring after stop! */ | |
997 | return; | |
998 | } | |
999 | ||
1000 | /* do after stop to avoid reconfiguring when we stop anyway */ | |
1001 | ieee80211_configure_filter(local); | |
1002 | ieee80211_hw_config(local, hw_reconf_flags); | |
1003 | ||
1004 | if (local->monitors == local->open_count) | |
075e0847 | 1005 | ieee80211_add_virtual_monitor(local); |
34d4bc4d JB |
1006 | } |
1007 | ||
1008 | static int ieee80211_stop(struct net_device *dev) | |
1009 | { | |
1010 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1011 | ||
1012 | ieee80211_do_stop(sdata, true); | |
5061b0c2 | 1013 | |
0d143fe1 JB |
1014 | return 0; |
1015 | } | |
1016 | ||
1017 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
1018 | { | |
0d143fe1 | 1019 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 1020 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
1021 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
1022 | ||
1023 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
1024 | promisc = !!(dev->flags & IFF_PROMISC); | |
1025 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
1026 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
1027 | ||
1028 | if (allmulti != sdata_allmulti) { | |
1029 | if (dev->flags & IFF_ALLMULTI) | |
1030 | atomic_inc(&local->iff_allmultis); | |
1031 | else | |
1032 | atomic_dec(&local->iff_allmultis); | |
1033 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
1034 | } | |
1035 | ||
1036 | if (promisc != sdata_promisc) { | |
1037 | if (dev->flags & IFF_PROMISC) | |
1038 | atomic_inc(&local->iff_promiscs); | |
1039 | else | |
1040 | atomic_dec(&local->iff_promiscs); | |
1041 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
1042 | } | |
3b8d81e0 | 1043 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 1044 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 1045 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 1046 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
1047 | } |
1048 | ||
75636525 JB |
1049 | /* |
1050 | * Called when the netdev is removed or, by the code below, before | |
1051 | * the interface type changes. | |
1052 | */ | |
f142c6b9 | 1053 | static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
1054 | { |
1055 | int i; | |
1056 | ||
75636525 | 1057 | /* free extra data */ |
7907c7d3 | 1058 | ieee80211_free_keys(sdata, false); |
75636525 | 1059 | |
aee14ceb JM |
1060 | ieee80211_debugfs_remove_netdev(sdata); |
1061 | ||
f0706e82 | 1062 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
1063 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
1064 | sdata->fragment_next = 0; | |
11a843b7 | 1065 | |
b9dcf712 JB |
1066 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1067 | mesh_rmc_free(sdata); | |
f0706e82 JB |
1068 | } |
1069 | ||
f142c6b9 JB |
1070 | static void ieee80211_uninit(struct net_device *dev) |
1071 | { | |
1072 | ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); | |
1073 | } | |
1074 | ||
cf0277e7 | 1075 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
f663dd9a | 1076 | struct sk_buff *skb, |
99932d4f DB |
1077 | void *accel_priv, |
1078 | select_queue_fallback_t fallback) | |
cf0277e7 JB |
1079 | { |
1080 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
1081 | } | |
1082 | ||
587e729e JB |
1083 | static const struct net_device_ops ieee80211_dataif_ops = { |
1084 | .ndo_open = ieee80211_open, | |
1085 | .ndo_stop = ieee80211_stop, | |
f142c6b9 | 1086 | .ndo_uninit = ieee80211_uninit, |
587e729e | 1087 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
afc4b13d | 1088 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
587e729e | 1089 | .ndo_change_mtu = ieee80211_change_mtu, |
47846c9b | 1090 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 1091 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
1092 | }; |
1093 | ||
cf0277e7 | 1094 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
f663dd9a | 1095 | struct sk_buff *skb, |
99932d4f DB |
1096 | void *accel_priv, |
1097 | select_queue_fallback_t fallback) | |
cf0277e7 JB |
1098 | { |
1099 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1100 | struct ieee80211_local *local = sdata->local; | |
1101 | struct ieee80211_hdr *hdr; | |
1102 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
1103 | ||
32c5057b | 1104 | if (local->hw.queues < IEEE80211_NUM_ACS) |
cf0277e7 JB |
1105 | return 0; |
1106 | ||
1107 | if (skb->len < 4 || | |
b49bb574 | 1108 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
1109 | return 0; /* doesn't matter, frame will be dropped */ |
1110 | ||
b49bb574 | 1111 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 1112 | |
00e96dec | 1113 | return ieee80211_select_queue_80211(sdata, skb, hdr); |
cf0277e7 JB |
1114 | } |
1115 | ||
587e729e JB |
1116 | static const struct net_device_ops ieee80211_monitorif_ops = { |
1117 | .ndo_open = ieee80211_open, | |
1118 | .ndo_stop = ieee80211_stop, | |
f142c6b9 | 1119 | .ndo_uninit = ieee80211_uninit, |
587e729e | 1120 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
afc4b13d | 1121 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
587e729e | 1122 | .ndo_change_mtu = ieee80211_change_mtu, |
31eba5bc | 1123 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 1124 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
1125 | }; |
1126 | ||
1127 | static void ieee80211_if_setup(struct net_device *dev) | |
1128 | { | |
1129 | ether_setup(dev); | |
550fd08c | 1130 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
587e729e | 1131 | dev->netdev_ops = &ieee80211_dataif_ops; |
587e729e JB |
1132 | dev->destructor = free_netdev; |
1133 | } | |
1134 | ||
1fa57d01 JB |
1135 | static void ieee80211_iface_work(struct work_struct *work) |
1136 | { | |
1137 | struct ieee80211_sub_if_data *sdata = | |
1138 | container_of(work, struct ieee80211_sub_if_data, work); | |
1139 | struct ieee80211_local *local = sdata->local; | |
1140 | struct sk_buff *skb; | |
344eec67 | 1141 | struct sta_info *sta; |
c1475ca9 | 1142 | struct ieee80211_ra_tid *ra_tid; |
1fa57d01 JB |
1143 | |
1144 | if (!ieee80211_sdata_running(sdata)) | |
1145 | return; | |
1146 | ||
1147 | if (local->scanning) | |
1148 | return; | |
1149 | ||
1150 | /* | |
1151 | * ieee80211_queue_work() should have picked up most cases, | |
1152 | * here we'll pick the rest. | |
1153 | */ | |
1154 | if (WARN(local->suspended, | |
1155 | "interface work scheduled while going to suspend\n")) | |
1156 | return; | |
1157 | ||
1158 | /* first process frames */ | |
1159 | while ((skb = skb_dequeue(&sdata->skb_queue))) { | |
bed7ee6e JB |
1160 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
1161 | ||
c1475ca9 JB |
1162 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
1163 | ra_tid = (void *)&skb->cb; | |
1164 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
1165 | ra_tid->tid); | |
1166 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { | |
1167 | ra_tid = (void *)&skb->cb; | |
1168 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
1169 | ra_tid->tid); | |
1170 | } else if (ieee80211_is_action(mgmt->frame_control) && | |
1171 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { | |
bed7ee6e | 1172 | int len = skb->len; |
bed7ee6e | 1173 | |
a93e3644 | 1174 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 1175 | sta = sta_info_get_bss(sdata, mgmt->sa); |
bed7ee6e JB |
1176 | if (sta) { |
1177 | switch (mgmt->u.action.u.addba_req.action_code) { | |
1178 | case WLAN_ACTION_ADDBA_REQ: | |
1179 | ieee80211_process_addba_request( | |
1180 | local, sta, mgmt, len); | |
1181 | break; | |
1182 | case WLAN_ACTION_ADDBA_RESP: | |
1183 | ieee80211_process_addba_resp(local, sta, | |
1184 | mgmt, len); | |
1185 | break; | |
1186 | case WLAN_ACTION_DELBA: | |
1187 | ieee80211_process_delba(sdata, sta, | |
1188 | mgmt, len); | |
1189 | break; | |
1190 | default: | |
1191 | WARN_ON(1); | |
1192 | break; | |
1193 | } | |
1194 | } | |
a93e3644 | 1195 | mutex_unlock(&local->sta_mtx); |
344eec67 JB |
1196 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
1197 | struct ieee80211_hdr *hdr = (void *)mgmt; | |
1198 | /* | |
1199 | * So the frame isn't mgmt, but frame_control | |
1200 | * is at the right place anyway, of course, so | |
1201 | * the if statement is correct. | |
1202 | * | |
1203 | * Warn if we have other data frame types here, | |
1204 | * they must not get here. | |
1205 | */ | |
1206 | WARN_ON(hdr->frame_control & | |
1207 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); | |
1208 | WARN_ON(!(hdr->seq_ctrl & | |
1209 | cpu_to_le16(IEEE80211_SCTL_FRAG))); | |
1210 | /* | |
1211 | * This was a fragment of a frame, received while | |
1212 | * a block-ack session was active. That cannot be | |
1213 | * right, so terminate the session. | |
1214 | */ | |
a93e3644 | 1215 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 1216 | sta = sta_info_get_bss(sdata, mgmt->sa); |
344eec67 JB |
1217 | if (sta) { |
1218 | u16 tid = *ieee80211_get_qos_ctl(hdr) & | |
1219 | IEEE80211_QOS_CTL_TID_MASK; | |
1220 | ||
1221 | __ieee80211_stop_rx_ba_session( | |
1222 | sta, tid, WLAN_BACK_RECIPIENT, | |
53f73c09 JB |
1223 | WLAN_REASON_QSTA_REQUIRE_SETUP, |
1224 | true); | |
344eec67 | 1225 | } |
a93e3644 | 1226 | mutex_unlock(&local->sta_mtx); |
bed7ee6e | 1227 | } else switch (sdata->vif.type) { |
1fa57d01 JB |
1228 | case NL80211_IFTYPE_STATION: |
1229 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
1230 | break; | |
1231 | case NL80211_IFTYPE_ADHOC: | |
1232 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
1233 | break; | |
1234 | case NL80211_IFTYPE_MESH_POINT: | |
1235 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
1236 | break; | |
1237 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
1238 | break; | |
1239 | default: | |
1240 | WARN(1, "frame for unexpected interface type"); | |
1fa57d01 JB |
1241 | break; |
1242 | } | |
36b3a628 JB |
1243 | |
1244 | kfree_skb(skb); | |
1fa57d01 JB |
1245 | } |
1246 | ||
1247 | /* then other type-dependent work */ | |
1248 | switch (sdata->vif.type) { | |
1249 | case NL80211_IFTYPE_STATION: | |
1250 | ieee80211_sta_work(sdata); | |
1251 | break; | |
1252 | case NL80211_IFTYPE_ADHOC: | |
1253 | ieee80211_ibss_work(sdata); | |
1254 | break; | |
1255 | case NL80211_IFTYPE_MESH_POINT: | |
1256 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
1257 | break; | |
1258 | ieee80211_mesh_work(sdata); | |
1259 | break; | |
1260 | default: | |
1261 | break; | |
1262 | } | |
1263 | } | |
1264 | ||
04ecd257 JB |
1265 | static void ieee80211_recalc_smps_work(struct work_struct *work) |
1266 | { | |
1267 | struct ieee80211_sub_if_data *sdata = | |
1268 | container_of(work, struct ieee80211_sub_if_data, recalc_smps); | |
1269 | ||
1270 | ieee80211_recalc_smps(sdata); | |
1271 | } | |
1fa57d01 | 1272 | |
75636525 JB |
1273 | /* |
1274 | * Helper function to initialise an interface to a specific type. | |
1275 | */ | |
1276 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 1277 | enum nl80211_iftype type) |
f0706e82 | 1278 | { |
75636525 JB |
1279 | /* clear type-dependent union */ |
1280 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
1281 | ||
1282 | /* and set some type-dependent values */ | |
1283 | sdata->vif.type = type; | |
2ca27bcf | 1284 | sdata->vif.p2p = false; |
60719ffd | 1285 | sdata->wdev.iftype = type; |
75636525 | 1286 | |
a621fa4d JB |
1287 | sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
1288 | sdata->control_port_no_encrypt = false; | |
2475b1cc | 1289 | sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
d3a58df8 | 1290 | sdata->vif.bss_conf.idle = true; |
a621fa4d | 1291 | |
b53be792 SW |
1292 | sdata->noack_map = 0; |
1293 | ||
f142c6b9 JB |
1294 | /* only monitor/p2p-device differ */ |
1295 | if (sdata->dev) { | |
1296 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; | |
1297 | sdata->dev->type = ARPHRD_ETHER; | |
1298 | } | |
75636525 | 1299 | |
35f20c14 | 1300 | skb_queue_head_init(&sdata->skb_queue); |
1fa57d01 | 1301 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
04ecd257 | 1302 | INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); |
73da7d5b | 1303 | INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); |
484298ad | 1304 | INIT_LIST_HEAD(&sdata->assigned_chanctx_list); |
e3afb920 | 1305 | INIT_LIST_HEAD(&sdata->reserved_chanctx_list); |
35f20c14 | 1306 | |
75636525 | 1307 | switch (type) { |
2ca27bcf JB |
1308 | case NL80211_IFTYPE_P2P_GO: |
1309 | type = NL80211_IFTYPE_AP; | |
1310 | sdata->vif.type = type; | |
1311 | sdata->vif.p2p = true; | |
1312 | /* fall through */ | |
05c914fe | 1313 | case NL80211_IFTYPE_AP: |
d012a605 | 1314 | skb_queue_head_init(&sdata->u.ap.ps.bc_buf); |
75636525 | 1315 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
687da132 EG |
1316 | INIT_WORK(&sdata->u.ap.request_smps_work, |
1317 | ieee80211_request_smps_ap_work); | |
ad2d223a | 1318 | sdata->vif.bss_conf.bssid = sdata->vif.addr; |
687da132 | 1319 | sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; |
75636525 | 1320 | break; |
2ca27bcf JB |
1321 | case NL80211_IFTYPE_P2P_CLIENT: |
1322 | type = NL80211_IFTYPE_STATION; | |
1323 | sdata->vif.type = type; | |
1324 | sdata->vif.p2p = true; | |
1325 | /* fall through */ | |
05c914fe | 1326 | case NL80211_IFTYPE_STATION: |
ad2d223a | 1327 | sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; |
9c6bd790 | 1328 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 1329 | break; |
46900298 | 1330 | case NL80211_IFTYPE_ADHOC: |
ad2d223a | 1331 | sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; |
46900298 JB |
1332 | ieee80211_ibss_setup_sdata(sdata); |
1333 | break; | |
05c914fe | 1334 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
1335 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1336 | ieee80211_mesh_init_sdata(sdata); | |
1337 | break; | |
05c914fe | 1338 | case NL80211_IFTYPE_MONITOR: |
75636525 | 1339 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 1340 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
1341 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
1342 | MONITOR_FLAG_OTHER_BSS; | |
1343 | break; | |
05c914fe | 1344 | case NL80211_IFTYPE_WDS: |
ad2d223a JB |
1345 | sdata->vif.bss_conf.bssid = NULL; |
1346 | break; | |
05c914fe | 1347 | case NL80211_IFTYPE_AP_VLAN: |
98104fde | 1348 | case NL80211_IFTYPE_P2P_DEVICE: |
ad2d223a | 1349 | sdata->vif.bss_conf.bssid = sdata->vif.addr; |
f142c6b9 | 1350 | break; |
05c914fe | 1351 | case NL80211_IFTYPE_UNSPECIFIED: |
2e161f78 | 1352 | case NUM_NL80211_IFTYPES: |
75636525 JB |
1353 | BUG(); |
1354 | break; | |
1355 | } | |
1356 | ||
1357 | ieee80211_debugfs_add_netdev(sdata); | |
1358 | } | |
1359 | ||
34d4bc4d JB |
1360 | static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
1361 | enum nl80211_iftype type) | |
1362 | { | |
1363 | struct ieee80211_local *local = sdata->local; | |
1364 | int ret, err; | |
2ca27bcf JB |
1365 | enum nl80211_iftype internal_type = type; |
1366 | bool p2p = false; | |
34d4bc4d JB |
1367 | |
1368 | ASSERT_RTNL(); | |
1369 | ||
1370 | if (!local->ops->change_interface) | |
1371 | return -EBUSY; | |
1372 | ||
1373 | switch (sdata->vif.type) { | |
1374 | case NL80211_IFTYPE_AP: | |
1375 | case NL80211_IFTYPE_STATION: | |
1376 | case NL80211_IFTYPE_ADHOC: | |
1377 | /* | |
1378 | * Could maybe also all others here? | |
1379 | * Just not sure how that interacts | |
1380 | * with the RX/config path e.g. for | |
1381 | * mesh. | |
1382 | */ | |
1383 | break; | |
1384 | default: | |
1385 | return -EBUSY; | |
1386 | } | |
1387 | ||
1388 | switch (type) { | |
1389 | case NL80211_IFTYPE_AP: | |
1390 | case NL80211_IFTYPE_STATION: | |
1391 | case NL80211_IFTYPE_ADHOC: | |
1392 | /* | |
1393 | * Could probably support everything | |
1394 | * but WDS here (WDS do_open can fail | |
1395 | * under memory pressure, which this | |
1396 | * code isn't prepared to handle). | |
1397 | */ | |
1398 | break; | |
2ca27bcf JB |
1399 | case NL80211_IFTYPE_P2P_CLIENT: |
1400 | p2p = true; | |
1401 | internal_type = NL80211_IFTYPE_STATION; | |
1402 | break; | |
1403 | case NL80211_IFTYPE_P2P_GO: | |
1404 | p2p = true; | |
1405 | internal_type = NL80211_IFTYPE_AP; | |
1406 | break; | |
34d4bc4d JB |
1407 | default: |
1408 | return -EBUSY; | |
1409 | } | |
1410 | ||
2ca27bcf | 1411 | ret = ieee80211_check_concurrent_iface(sdata, internal_type); |
34d4bc4d JB |
1412 | if (ret) |
1413 | return ret; | |
1414 | ||
1415 | ieee80211_do_stop(sdata, false); | |
1416 | ||
f142c6b9 | 1417 | ieee80211_teardown_sdata(sdata); |
34d4bc4d | 1418 | |
2ca27bcf | 1419 | ret = drv_change_interface(local, sdata, internal_type, p2p); |
34d4bc4d | 1420 | if (ret) |
a9865538 | 1421 | type = ieee80211_vif_type_p2p(&sdata->vif); |
34d4bc4d | 1422 | |
3a25a8c8 JB |
1423 | /* |
1424 | * Ignore return value here, there's not much we can do since | |
1425 | * the driver changed the interface type internally already. | |
1426 | * The warnings will hopefully make driver authors fix it :-) | |
1427 | */ | |
a9865538 | 1428 | ieee80211_check_queues(sdata, type); |
3a25a8c8 | 1429 | |
34d4bc4d JB |
1430 | ieee80211_setup_sdata(sdata, type); |
1431 | ||
f142c6b9 | 1432 | err = ieee80211_do_open(&sdata->wdev, false); |
34d4bc4d JB |
1433 | WARN(err, "type change: do_open returned %d", err); |
1434 | ||
1435 | return ret; | |
1436 | } | |
1437 | ||
f3947e2d | 1438 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 1439 | enum nl80211_iftype type) |
75636525 | 1440 | { |
34d4bc4d JB |
1441 | int ret; |
1442 | ||
f3947e2d JB |
1443 | ASSERT_RTNL(); |
1444 | ||
2ca27bcf | 1445 | if (type == ieee80211_vif_type_p2p(&sdata->vif)) |
f3947e2d JB |
1446 | return 0; |
1447 | ||
34d4bc4d JB |
1448 | if (ieee80211_sdata_running(sdata)) { |
1449 | ret = ieee80211_runtime_change_iftype(sdata, type); | |
1450 | if (ret) | |
1451 | return ret; | |
1452 | } else { | |
1453 | /* Purge and reset type-dependent state. */ | |
f142c6b9 | 1454 | ieee80211_teardown_sdata(sdata); |
34d4bc4d JB |
1455 | ieee80211_setup_sdata(sdata, type); |
1456 | } | |
75636525 JB |
1457 | |
1458 | /* reset some values that shouldn't be kept across type changes */ | |
75636525 | 1459 | sdata->drop_unencrypted = 0; |
9bc383de JB |
1460 | if (type == NL80211_IFTYPE_STATION) |
1461 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
1462 | |
1463 | return 0; | |
f0706e82 JB |
1464 | } |
1465 | ||
fa9029f8 | 1466 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
f142c6b9 | 1467 | u8 *perm_addr, enum nl80211_iftype type) |
fa9029f8 JB |
1468 | { |
1469 | struct ieee80211_sub_if_data *sdata; | |
1470 | u64 mask, start, addr, val, inc; | |
1471 | u8 *m; | |
1472 | u8 tmp_addr[ETH_ALEN]; | |
1473 | int i; | |
1474 | ||
1475 | /* default ... something at least */ | |
f142c6b9 | 1476 | memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
fa9029f8 JB |
1477 | |
1478 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
1479 | local->hw.wiphy->n_addresses <= 1) | |
1480 | return; | |
1481 | ||
fa9029f8 JB |
1482 | mutex_lock(&local->iflist_mtx); |
1483 | ||
1484 | switch (type) { | |
1485 | case NL80211_IFTYPE_MONITOR: | |
1486 | /* doesn't matter */ | |
1487 | break; | |
1488 | case NL80211_IFTYPE_WDS: | |
1489 | case NL80211_IFTYPE_AP_VLAN: | |
1490 | /* match up with an AP interface */ | |
1491 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1492 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1493 | continue; | |
f142c6b9 | 1494 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
fa9029f8 JB |
1495 | break; |
1496 | } | |
1497 | /* keep default if no AP interface present */ | |
1498 | break; | |
6d71117a JB |
1499 | case NL80211_IFTYPE_P2P_CLIENT: |
1500 | case NL80211_IFTYPE_P2P_GO: | |
1501 | if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) { | |
1502 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1503 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) | |
1504 | continue; | |
1505 | if (!ieee80211_sdata_running(sdata)) | |
1506 | continue; | |
1507 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); | |
1508 | goto out_unlock; | |
1509 | } | |
1510 | } | |
1511 | /* otherwise fall through */ | |
fa9029f8 JB |
1512 | default: |
1513 | /* assign a new address if possible -- try n_addresses first */ | |
1514 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
1515 | bool used = false; | |
1516 | ||
1517 | list_for_each_entry(sdata, &local->interfaces, list) { | |
496d7e8e | 1518 | if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, |
1519 | sdata->vif.addr)) { | |
fa9029f8 JB |
1520 | used = true; |
1521 | break; | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | if (!used) { | |
f142c6b9 | 1526 | memcpy(perm_addr, |
fa9029f8 JB |
1527 | local->hw.wiphy->addresses[i].addr, |
1528 | ETH_ALEN); | |
1529 | break; | |
1530 | } | |
1531 | } | |
1532 | ||
1533 | /* try mask if available */ | |
1534 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
1535 | break; | |
1536 | ||
1537 | m = local->hw.wiphy->addr_mask; | |
1538 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1539 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1540 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1541 | ||
1542 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
1543 | /* not a contiguous mask ... not handled now! */ | |
bdcbd8e0 | 1544 | pr_info("not contiguous\n"); |
fa9029f8 JB |
1545 | break; |
1546 | } | |
1547 | ||
ac20976d HS |
1548 | /* |
1549 | * Pick address of existing interface in case user changed | |
1550 | * MAC address manually, default to perm_addr. | |
1551 | */ | |
fa9029f8 | 1552 | m = local->hw.wiphy->perm_addr; |
ac20976d HS |
1553 | list_for_each_entry(sdata, &local->interfaces, list) { |
1554 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) | |
1555 | continue; | |
1556 | m = sdata->vif.addr; | |
1557 | break; | |
1558 | } | |
fa9029f8 JB |
1559 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
1560 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1561 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1562 | ||
1563 | inc = 1ULL<<__ffs64(mask); | |
1564 | val = (start & mask); | |
1565 | addr = (start & ~mask) | (val & mask); | |
1566 | do { | |
1567 | bool used = false; | |
1568 | ||
1569 | tmp_addr[5] = addr >> 0*8; | |
1570 | tmp_addr[4] = addr >> 1*8; | |
1571 | tmp_addr[3] = addr >> 2*8; | |
1572 | tmp_addr[2] = addr >> 3*8; | |
1573 | tmp_addr[1] = addr >> 4*8; | |
1574 | tmp_addr[0] = addr >> 5*8; | |
1575 | ||
1576 | val += inc; | |
1577 | ||
1578 | list_for_each_entry(sdata, &local->interfaces, list) { | |
496d7e8e | 1579 | if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { |
fa9029f8 JB |
1580 | used = true; |
1581 | break; | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | if (!used) { | |
f142c6b9 | 1586 | memcpy(perm_addr, tmp_addr, ETH_ALEN); |
fa9029f8 JB |
1587 | break; |
1588 | } | |
1589 | addr = (start & ~mask) | (val & mask); | |
1590 | } while (addr != start); | |
1591 | ||
1592 | break; | |
1593 | } | |
1594 | ||
6d71117a | 1595 | out_unlock: |
fa9029f8 JB |
1596 | mutex_unlock(&local->iflist_mtx); |
1597 | } | |
1598 | ||
3e122be0 | 1599 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
84efbb84 | 1600 | struct wireless_dev **new_wdev, enum nl80211_iftype type, |
ee385855 | 1601 | struct vif_params *params) |
f0706e82 | 1602 | { |
f142c6b9 | 1603 | struct net_device *ndev = NULL; |
f0706e82 | 1604 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 1605 | int ret, i; |
ded81f6b | 1606 | int txqs = 1; |
f0706e82 JB |
1607 | |
1608 | ASSERT_RTNL(); | |
75636525 | 1609 | |
f142c6b9 JB |
1610 | if (type == NL80211_IFTYPE_P2P_DEVICE) { |
1611 | struct wireless_dev *wdev; | |
1612 | ||
1613 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, | |
1614 | GFP_KERNEL); | |
1615 | if (!sdata) | |
1616 | return -ENOMEM; | |
1617 | wdev = &sdata->wdev; | |
1618 | ||
1619 | sdata->dev = NULL; | |
1620 | strlcpy(sdata->name, name, IFNAMSIZ); | |
1621 | ieee80211_assign_perm_addr(local, wdev->address, type); | |
1622 | memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); | |
1623 | } else { | |
1624 | if (local->hw.queues >= IEEE80211_NUM_ACS) | |
1625 | txqs = IEEE80211_NUM_ACS; | |
1626 | ||
1627 | ndev = alloc_netdev_mqs(sizeof(*sdata) + | |
1628 | local->hw.vif_data_size, | |
1629 | name, ieee80211_if_setup, txqs, 1); | |
1630 | if (!ndev) | |
1631 | return -ENOMEM; | |
1632 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); | |
1633 | ||
1634 | ndev->needed_headroom = local->tx_headroom + | |
1635 | 4*6 /* four MAC addresses */ | |
1636 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
1637 | + 6 /* mesh */ | |
1638 | + 8 /* rfc1042/bridge tunnel */ | |
1639 | - ETH_HLEN /* ethernet hard_header_len */ | |
1640 | + IEEE80211_ENCRYPT_HEADROOM; | |
1641 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
1642 | ||
1643 | ret = dev_alloc_name(ndev, ndev->name); | |
1644 | if (ret < 0) { | |
1645 | free_netdev(ndev); | |
1646 | return ret; | |
1647 | } | |
1648 | ||
1649 | ieee80211_assign_perm_addr(local, ndev->perm_addr, type); | |
1650 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
1651 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
1652 | ||
1653 | /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ | |
1654 | sdata = netdev_priv(ndev); | |
1655 | ndev->ieee80211_ptr = &sdata->wdev; | |
1656 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); | |
1657 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
1658 | ||
1659 | sdata->dev = ndev; | |
1660 | } | |
75636525 JB |
1661 | |
1662 | /* initialise type-independent data */ | |
f0706e82 | 1663 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 1664 | sdata->local = local; |
75636525 JB |
1665 | |
1666 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
1667 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
1668 | ||
1669 | INIT_LIST_HEAD(&sdata->key_list); | |
1670 | ||
164eb02d SW |
1671 | INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, |
1672 | ieee80211_dfs_cac_timer_work); | |
8d1f7ecd JB |
1673 | INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, |
1674 | ieee80211_delayed_tailroom_dec); | |
97f97b1f | 1675 | |
37eb0b16 JM |
1676 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
1677 | struct ieee80211_supported_band *sband; | |
1678 | sband = local->hw.wiphy->bands[i]; | |
1679 | sdata->rc_rateidx_mask[i] = | |
1680 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
19468413 SW |
1681 | if (sband) |
1682 | memcpy(sdata->rc_rateidx_mcs_mask[i], | |
1683 | sband->ht_cap.mcs.rx_mask, | |
1684 | sizeof(sdata->rc_rateidx_mcs_mask[i])); | |
1685 | else | |
1686 | memset(sdata->rc_rateidx_mcs_mask[i], 0, | |
1687 | sizeof(sdata->rc_rateidx_mcs_mask[i])); | |
37eb0b16 | 1688 | } |
75636525 | 1689 | |
3a25a8c8 JB |
1690 | ieee80211_set_default_queues(sdata); |
1691 | ||
1ea6f9c0 JB |
1692 | sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
1693 | sdata->user_power_level = local->user_power_level; | |
1694 | ||
2475b1cc MS |
1695 | sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
1696 | ||
75636525 JB |
1697 | /* setup type-dependent data */ |
1698 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 1699 | |
f142c6b9 JB |
1700 | if (ndev) { |
1701 | if (params) { | |
1702 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1703 | if (type == NL80211_IFTYPE_STATION) | |
1704 | sdata->u.mgd.use_4addr = params->use_4addr; | |
1705 | } | |
9bc383de | 1706 | |
f142c6b9 | 1707 | ndev->features |= local->hw.netdev_features; |
72d78728 | 1708 | |
b7ffbd7e JB |
1709 | netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); |
1710 | ||
f142c6b9 JB |
1711 | ret = register_netdevice(ndev); |
1712 | if (ret) { | |
1713 | free_netdev(ndev); | |
1714 | return ret; | |
1715 | } | |
1716 | } | |
f0706e82 | 1717 | |
c771c9d8 | 1718 | mutex_lock(&local->iflist_mtx); |
79010420 | 1719 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1720 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1721 | |
84efbb84 JB |
1722 | if (new_wdev) |
1723 | *new_wdev = &sdata->wdev; | |
f0706e82 | 1724 | |
f0706e82 | 1725 | return 0; |
f0706e82 JB |
1726 | } |
1727 | ||
f698d856 | 1728 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1729 | { |
f0706e82 | 1730 | ASSERT_RTNL(); |
11a843b7 | 1731 | |
c771c9d8 | 1732 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1733 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1734 | mutex_unlock(&sdata->local->iflist_mtx); |
1735 | ||
75636525 | 1736 | synchronize_rcu(); |
f142c6b9 JB |
1737 | |
1738 | if (sdata->dev) { | |
1739 | unregister_netdevice(sdata->dev); | |
1740 | } else { | |
1741 | cfg80211_unregister_wdev(&sdata->wdev); | |
1742 | kfree(sdata); | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) | |
1747 | { | |
1748 | if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) | |
1749 | return; | |
1750 | ieee80211_do_stop(sdata, true); | |
1751 | ieee80211_teardown_sdata(sdata); | |
f0706e82 JB |
1752 | } |
1753 | ||
75636525 JB |
1754 | /* |
1755 | * Remove all interfaces, may only be called at hardware unregistration | |
1756 | * time because it doesn't do RCU-safe list removals. | |
1757 | */ | |
1758 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1759 | { |
75636525 | 1760 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1761 | LIST_HEAD(unreg_list); |
f142c6b9 | 1762 | LIST_HEAD(wdev_list); |
f0706e82 JB |
1763 | |
1764 | ASSERT_RTNL(); | |
1765 | ||
c8aa22db JB |
1766 | /* |
1767 | * Close all AP_VLAN interfaces first, as otherwise they | |
1768 | * might be closed while the AP interface they belong to | |
1769 | * is closed, causing unregister_netdevice_many() to crash. | |
1770 | */ | |
1771 | list_for_each_entry(sdata, &local->interfaces, list) | |
1772 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1773 | dev_close(sdata->dev); | |
1774 | ||
efe117ab | 1775 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1776 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1777 | list_del(&sdata->list); | |
c771c9d8 | 1778 | |
f142c6b9 JB |
1779 | if (sdata->dev) |
1780 | unregister_netdevice_queue(sdata->dev, &unreg_list); | |
1781 | else | |
1782 | list_add(&sdata->list, &wdev_list); | |
f0706e82 | 1783 | } |
efe117ab ED |
1784 | mutex_unlock(&local->iflist_mtx); |
1785 | unregister_netdevice_many(&unreg_list); | |
f142c6b9 JB |
1786 | |
1787 | list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { | |
1788 | list_del(&sdata->list); | |
1789 | cfg80211_unregister_wdev(&sdata->wdev); | |
1790 | kfree(sdata); | |
1791 | } | |
f0706e82 | 1792 | } |
5cff20e6 | 1793 | |
47846c9b | 1794 | static int netdev_notify(struct notifier_block *nb, |
351638e7 | 1795 | unsigned long state, void *ptr) |
47846c9b | 1796 | { |
351638e7 | 1797 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
47846c9b JB |
1798 | struct ieee80211_sub_if_data *sdata; |
1799 | ||
1800 | if (state != NETDEV_CHANGENAME) | |
8bd811aa | 1801 | return NOTIFY_DONE; |
47846c9b JB |
1802 | |
1803 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
8bd811aa | 1804 | return NOTIFY_DONE; |
47846c9b JB |
1805 | |
1806 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
8bd811aa | 1807 | return NOTIFY_DONE; |
47846c9b JB |
1808 | |
1809 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2f5265e6 | 1810 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b | 1811 | ieee80211_debugfs_rename_netdev(sdata); |
8bd811aa ZG |
1812 | |
1813 | return NOTIFY_OK; | |
47846c9b JB |
1814 | } |
1815 | ||
1816 | static struct notifier_block mac80211_netdev_notifier = { | |
1817 | .notifier_call = netdev_notify, | |
1818 | }; | |
1819 | ||
1820 | int ieee80211_iface_init(void) | |
1821 | { | |
1822 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1823 | } | |
1824 | ||
1825 | void ieee80211_iface_exit(void) | |
1826 | { | |
1827 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1828 | } |