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