Commit | Line | Data |
---|---|---|
f0706e82 | 1 | /* |
0d143fe1 JB |
2 | * Interface handling (except master interface) |
3 | * | |
f0706e82 JB |
4 | * Copyright 2002-2005, Instant802 Networks, Inc. |
5 | * Copyright 2005-2006, Devicescape Software, Inc. | |
6 | * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> | |
75636525 | 7 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
f0706e82 JB |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
f0706e82 JB |
14 | #include <linux/kernel.h> |
15 | #include <linux/if_arp.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/rtnetlink.h> | |
18 | #include <net/mac80211.h> | |
cf0277e7 | 19 | #include <net/ieee80211_radiotap.h> |
f0706e82 JB |
20 | #include "ieee80211_i.h" |
21 | #include "sta_info.h" | |
e9f207f0 | 22 | #include "debugfs_netdev.h" |
ee385855 | 23 | #include "mesh.h" |
0d143fe1 | 24 | #include "led.h" |
24487981 | 25 | #include "driver-ops.h" |
cf0277e7 | 26 | #include "wme.h" |
1be7fe8d | 27 | #include "rate.h" |
0d143fe1 | 28 | |
c771c9d8 JB |
29 | /** |
30 | * DOC: Interface list locking | |
31 | * | |
32 | * The interface list in each struct ieee80211_local is protected | |
33 | * three-fold: | |
34 | * | |
35 | * (1) modifications may only be done under the RTNL | |
36 | * (2) modifications and readers are protected against each other by | |
37 | * the iflist_mtx. | |
38 | * (3) modifications are done in an RCU manner so atomic readers | |
39 | * can traverse the list in RCU-safe blocks. | |
40 | * | |
41 | * As a consequence, reads (traversals) of the list can be protected | |
42 | * by either the RTNL, the iflist_mtx or RCU. | |
43 | */ | |
44 | ||
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 | |
cc45ae54 JB |
81 | static u32 ieee80211_idle_off(struct ieee80211_local *local, |
82 | const char *reason) | |
83 | { | |
84 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) | |
85 | return 0; | |
86 | ||
87 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; | |
88 | return IEEE80211_CONF_CHANGE_IDLE; | |
89 | } | |
90 | ||
91 | static u32 ieee80211_idle_on(struct ieee80211_local *local) | |
92 | { | |
93 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) | |
94 | return 0; | |
95 | ||
96 | drv_flush(local, false); | |
97 | ||
98 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; | |
99 | return IEEE80211_CONF_CHANGE_IDLE; | |
100 | } | |
101 | ||
102 | static u32 __ieee80211_recalc_idle(struct ieee80211_local *local) | |
103 | { | |
104 | struct ieee80211_sub_if_data *sdata; | |
105 | int count = 0; | |
106 | bool working = false, scanning = false; | |
107 | unsigned int led_trig_start = 0, led_trig_stop = 0; | |
108 | struct ieee80211_roc_work *roc; | |
109 | ||
110 | #ifdef CONFIG_PROVE_LOCKING | |
111 | WARN_ON(debug_locks && !lockdep_rtnl_is_held() && | |
112 | !lockdep_is_held(&local->iflist_mtx)); | |
113 | #endif | |
114 | lockdep_assert_held(&local->mtx); | |
115 | ||
116 | list_for_each_entry(sdata, &local->interfaces, list) { | |
117 | if (!ieee80211_sdata_running(sdata)) { | |
118 | sdata->vif.bss_conf.idle = true; | |
119 | continue; | |
120 | } | |
121 | ||
122 | sdata->old_idle = sdata->vif.bss_conf.idle; | |
123 | ||
124 | /* do not count disabled managed interfaces */ | |
125 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
126 | !sdata->u.mgd.associated && | |
127 | !sdata->u.mgd.auth_data && | |
128 | !sdata->u.mgd.assoc_data) { | |
129 | sdata->vif.bss_conf.idle = true; | |
130 | continue; | |
131 | } | |
132 | /* do not count unused IBSS interfaces */ | |
133 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
134 | !sdata->u.ibss.ssid_len) { | |
135 | sdata->vif.bss_conf.idle = true; | |
136 | continue; | |
137 | } | |
f142c6b9 JB |
138 | |
139 | if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) | |
140 | continue; | |
141 | ||
cc45ae54 JB |
142 | /* count everything else */ |
143 | sdata->vif.bss_conf.idle = false; | |
144 | count++; | |
145 | } | |
146 | ||
147 | if (!local->ops->remain_on_channel) { | |
148 | list_for_each_entry(roc, &local->roc_list, list) { | |
149 | working = true; | |
150 | roc->sdata->vif.bss_conf.idle = false; | |
151 | } | |
152 | } | |
153 | ||
e2fd5dbc JB |
154 | sdata = rcu_dereference_protected(local->scan_sdata, |
155 | lockdep_is_held(&local->mtx)); | |
156 | if (sdata && !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) { | |
cc45ae54 | 157 | scanning = true; |
e2fd5dbc | 158 | sdata->vif.bss_conf.idle = false; |
cc45ae54 JB |
159 | } |
160 | ||
161 | list_for_each_entry(sdata, &local->interfaces, list) { | |
162 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
f142c6b9 JB |
163 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
164 | sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) | |
cc45ae54 JB |
165 | continue; |
166 | if (sdata->old_idle == sdata->vif.bss_conf.idle) | |
167 | continue; | |
168 | if (!ieee80211_sdata_running(sdata)) | |
169 | continue; | |
170 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); | |
171 | } | |
172 | ||
173 | if (working || scanning) | |
174 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; | |
175 | else | |
176 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; | |
177 | ||
178 | if (count) | |
179 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; | |
180 | else | |
181 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; | |
182 | ||
183 | ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); | |
184 | ||
185 | if (working) | |
186 | return ieee80211_idle_off(local, "working"); | |
187 | if (scanning) | |
188 | return ieee80211_idle_off(local, "scanning"); | |
189 | if (!count) | |
190 | return ieee80211_idle_on(local); | |
191 | else | |
192 | return ieee80211_idle_off(local, "in use"); | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
197 | void ieee80211_recalc_idle(struct ieee80211_local *local) | |
198 | { | |
199 | u32 chg; | |
200 | ||
201 | mutex_lock(&local->iflist_mtx); | |
202 | chg = __ieee80211_recalc_idle(local); | |
203 | mutex_unlock(&local->iflist_mtx); | |
204 | if (chg) | |
205 | ieee80211_hw_config(local, chg); | |
206 | } | |
207 | ||
0d143fe1 JB |
208 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
209 | { | |
210 | int meshhdrlen; | |
211 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
212 | ||
213 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
214 | ||
215 | /* FIX: what would be proper limits for MTU? | |
216 | * This interface uses 802.3 frames. */ | |
217 | if (new_mtu < 256 || | |
218 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
219 | return -EINVAL; | |
220 | } | |
221 | ||
0d143fe1 JB |
222 | dev->mtu = new_mtu; |
223 | return 0; | |
224 | } | |
225 | ||
478622e8 HS |
226 | static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr) |
227 | { | |
228 | struct ieee80211_sub_if_data *sdata; | |
229 | u64 new, mask, tmp; | |
230 | u8 *m; | |
231 | int ret = 0; | |
232 | ||
233 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
234 | return 0; | |
235 | ||
236 | m = addr; | |
237 | new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
238 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
239 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
240 | ||
241 | m = local->hw.wiphy->addr_mask; | |
242 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
243 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
244 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
245 | ||
246 | ||
247 | mutex_lock(&local->iflist_mtx); | |
248 | list_for_each_entry(sdata, &local->interfaces, list) { | |
249 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) | |
250 | continue; | |
251 | ||
252 | m = sdata->vif.addr; | |
253 | tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
254 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
255 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
256 | ||
257 | if ((new & ~mask) != (tmp & ~mask)) { | |
258 | ret = -EINVAL; | |
259 | break; | |
260 | } | |
261 | } | |
262 | mutex_unlock(&local->iflist_mtx); | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
47846c9b JB |
267 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
268 | { | |
269 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
fc5f7577 | 270 | struct sockaddr *sa = addr; |
47846c9b JB |
271 | int ret; |
272 | ||
9607e6b6 | 273 | if (ieee80211_sdata_running(sdata)) |
47846c9b JB |
274 | return -EBUSY; |
275 | ||
478622e8 HS |
276 | ret = ieee80211_verify_mac(sdata->local, sa->sa_data); |
277 | if (ret) | |
278 | return ret; | |
279 | ||
fc5f7577 | 280 | ret = eth_mac_addr(dev, sa); |
47846c9b JB |
281 | |
282 | if (ret == 0) | |
fc5f7577 | 283 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
47846c9b JB |
284 | |
285 | return ret; | |
286 | } | |
287 | ||
0d143fe1 JB |
288 | static inline int identical_mac_addr_allowed(int type1, int type2) |
289 | { | |
290 | return type1 == NL80211_IFTYPE_MONITOR || | |
291 | type2 == NL80211_IFTYPE_MONITOR || | |
f142c6b9 JB |
292 | type1 == NL80211_IFTYPE_P2P_DEVICE || |
293 | type2 == NL80211_IFTYPE_P2P_DEVICE || | |
0d143fe1 JB |
294 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
295 | (type1 == NL80211_IFTYPE_WDS && | |
296 | (type2 == NL80211_IFTYPE_WDS || | |
297 | type2 == NL80211_IFTYPE_AP)) || | |
298 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
299 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
300 | (type2 == NL80211_IFTYPE_AP || | |
301 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
302 | } | |
303 | ||
87490f6d JB |
304 | static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, |
305 | enum nl80211_iftype iftype) | |
0d143fe1 | 306 | { |
b4a4bf5d | 307 | struct ieee80211_local *local = sdata->local; |
87490f6d | 308 | struct ieee80211_sub_if_data *nsdata; |
0d143fe1 | 309 | |
87490f6d | 310 | ASSERT_RTNL(); |
0d143fe1 JB |
311 | |
312 | /* we hold the RTNL here so can safely walk the list */ | |
313 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
371a255e | 314 | if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { |
0d143fe1 JB |
315 | /* |
316 | * Allow only a single IBSS interface to be up at any | |
317 | * time. This is restricted because beacon distribution | |
318 | * cannot work properly if both are in the same IBSS. | |
319 | * | |
320 | * To remove this restriction we'd have to disallow them | |
321 | * from setting the same SSID on different IBSS interfaces | |
322 | * belonging to the same hardware. Then, however, we're | |
323 | * faced with having to adopt two different TSF timers... | |
324 | */ | |
87490f6d | 325 | if (iftype == NL80211_IFTYPE_ADHOC && |
0d143fe1 JB |
326 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
327 | return -EBUSY; | |
328 | ||
329 | /* | |
330 | * The remaining checks are only performed for interfaces | |
331 | * with the same MAC address. | |
332 | */ | |
371a255e JB |
333 | if (!ether_addr_equal(sdata->vif.addr, |
334 | nsdata->vif.addr)) | |
0d143fe1 JB |
335 | continue; |
336 | ||
337 | /* | |
338 | * check whether it may have the same address | |
339 | */ | |
87490f6d | 340 | if (!identical_mac_addr_allowed(iftype, |
0d143fe1 JB |
341 | nsdata->vif.type)) |
342 | return -ENOTUNIQ; | |
343 | ||
344 | /* | |
345 | * can only add VLANs to enabled APs | |
346 | */ | |
87490f6d | 347 | if (iftype == NL80211_IFTYPE_AP_VLAN && |
0d143fe1 JB |
348 | nsdata->vif.type == NL80211_IFTYPE_AP) |
349 | sdata->bss = &nsdata->u.ap; | |
350 | } | |
351 | } | |
352 | ||
87490f6d JB |
353 | return 0; |
354 | } | |
355 | ||
3a25a8c8 JB |
356 | static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata) |
357 | { | |
358 | int n_queues = sdata->local->hw.queues; | |
359 | int i; | |
360 | ||
0ef24e52 IP |
361 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { |
362 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
363 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == | |
364 | IEEE80211_INVAL_HW_QUEUE)) | |
365 | return -EINVAL; | |
366 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= | |
367 | n_queues)) | |
368 | return -EINVAL; | |
369 | } | |
3a25a8c8 JB |
370 | } |
371 | ||
bb3e10fb LC |
372 | if ((sdata->vif.type != NL80211_IFTYPE_AP) || |
373 | !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) { | |
3a25a8c8 JB |
374 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
375 | return 0; | |
376 | } | |
377 | ||
378 | if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) | |
379 | return -EINVAL; | |
380 | ||
381 | if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) | |
382 | return -EINVAL; | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
85416a4f CL |
387 | void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, |
388 | const int offset) | |
389 | { | |
390 | struct ieee80211_local *local = sdata->local; | |
391 | u32 flags = sdata->u.mntr_flags; | |
392 | ||
393 | #define ADJUST(_f, _s) do { \ | |
394 | if (flags & MONITOR_FLAG_##_f) \ | |
395 | local->fif_##_s += offset; \ | |
396 | } while (0) | |
397 | ||
398 | ADJUST(FCSFAIL, fcsfail); | |
399 | ADJUST(PLCPFAIL, plcpfail); | |
400 | ADJUST(CONTROL, control); | |
401 | ADJUST(CONTROL, pspoll); | |
402 | ADJUST(OTHER_BSS, other_bss); | |
403 | ||
404 | #undef ADJUST | |
405 | } | |
406 | ||
3a25a8c8 JB |
407 | static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) |
408 | { | |
409 | struct ieee80211_local *local = sdata->local; | |
410 | int i; | |
411 | ||
412 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
413 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
414 | sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; | |
a9d3c05c | 415 | else if (local->hw.queues >= IEEE80211_NUM_ACS) |
3a25a8c8 | 416 | sdata->vif.hw_queue[i] = i; |
a9d3c05c JB |
417 | else |
418 | sdata->vif.hw_queue[i] = 0; | |
3a25a8c8 JB |
419 | } |
420 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; | |
421 | } | |
422 | ||
075e0847 | 423 | static int ieee80211_add_virtual_monitor(struct ieee80211_local *local) |
4b6f1dd6 JB |
424 | { |
425 | struct ieee80211_sub_if_data *sdata; | |
685fb72b | 426 | int ret = 0; |
4b6f1dd6 JB |
427 | |
428 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) | |
429 | return 0; | |
430 | ||
685fb72b JB |
431 | mutex_lock(&local->iflist_mtx); |
432 | ||
4b6f1dd6 | 433 | if (local->monitor_sdata) |
685fb72b | 434 | goto out_unlock; |
4b6f1dd6 JB |
435 | |
436 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); | |
685fb72b JB |
437 | if (!sdata) { |
438 | ret = -ENOMEM; | |
439 | goto out_unlock; | |
440 | } | |
4b6f1dd6 JB |
441 | |
442 | /* set up data */ | |
443 | sdata->local = local; | |
444 | sdata->vif.type = NL80211_IFTYPE_MONITOR; | |
445 | snprintf(sdata->name, IFNAMSIZ, "%s-monitor", | |
446 | wiphy_name(local->hw.wiphy)); | |
447 | ||
3a25a8c8 JB |
448 | ieee80211_set_default_queues(sdata); |
449 | ||
4b6f1dd6 JB |
450 | ret = drv_add_interface(local, sdata); |
451 | if (WARN_ON(ret)) { | |
452 | /* ok .. stupid driver, it asked for this! */ | |
453 | kfree(sdata); | |
685fb72b | 454 | goto out_unlock; |
4b6f1dd6 JB |
455 | } |
456 | ||
3a25a8c8 JB |
457 | ret = ieee80211_check_queues(sdata); |
458 | if (ret) { | |
459 | kfree(sdata); | |
685fb72b | 460 | goto out_unlock; |
3a25a8c8 JB |
461 | } |
462 | ||
4bf88530 | 463 | ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, |
55de908a JB |
464 | IEEE80211_CHANCTX_EXCLUSIVE); |
465 | if (ret) { | |
466 | drv_remove_interface(local, sdata); | |
467 | kfree(sdata); | |
468 | goto out_unlock; | |
469 | } | |
470 | ||
4b6f1dd6 | 471 | rcu_assign_pointer(local->monitor_sdata, sdata); |
685fb72b JB |
472 | out_unlock: |
473 | mutex_unlock(&local->iflist_mtx); | |
474 | return ret; | |
4b6f1dd6 JB |
475 | } |
476 | ||
075e0847 | 477 | static void ieee80211_del_virtual_monitor(struct ieee80211_local *local) |
4b6f1dd6 JB |
478 | { |
479 | struct ieee80211_sub_if_data *sdata; | |
480 | ||
481 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) | |
482 | return; | |
483 | ||
685fb72b | 484 | mutex_lock(&local->iflist_mtx); |
4b6f1dd6 | 485 | |
685fb72b JB |
486 | sdata = rcu_dereference_protected(local->monitor_sdata, |
487 | lockdep_is_held(&local->iflist_mtx)); | |
4b6f1dd6 | 488 | if (!sdata) |
685fb72b | 489 | goto out_unlock; |
4b6f1dd6 JB |
490 | |
491 | rcu_assign_pointer(local->monitor_sdata, NULL); | |
492 | synchronize_net(); | |
493 | ||
55de908a JB |
494 | ieee80211_vif_release_channel(sdata); |
495 | ||
4b6f1dd6 JB |
496 | drv_remove_interface(local, sdata); |
497 | ||
498 | kfree(sdata); | |
685fb72b JB |
499 | out_unlock: |
500 | mutex_unlock(&local->iflist_mtx); | |
4b6f1dd6 JB |
501 | } |
502 | ||
34d4bc4d JB |
503 | /* |
504 | * NOTE: Be very careful when changing this function, it must NOT return | |
505 | * an error on interface type changes that have been pre-checked, so most | |
506 | * checks should be in ieee80211_check_concurrent_iface. | |
507 | */ | |
f142c6b9 | 508 | int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) |
87490f6d | 509 | { |
f142c6b9 JB |
510 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); |
511 | struct net_device *dev = wdev->netdev; | |
87490f6d JB |
512 | struct ieee80211_local *local = sdata->local; |
513 | struct sta_info *sta; | |
514 | u32 changed = 0; | |
515 | int res; | |
516 | u32 hw_reconf_flags = 0; | |
517 | ||
0d143fe1 JB |
518 | switch (sdata->vif.type) { |
519 | case NL80211_IFTYPE_WDS: | |
520 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
521 | return -ENOLINK; | |
522 | break; | |
665c93a9 JB |
523 | case NL80211_IFTYPE_AP_VLAN: { |
524 | struct ieee80211_sub_if_data *master; | |
525 | ||
0d143fe1 JB |
526 | if (!sdata->bss) |
527 | return -ENOLINK; | |
665c93a9 | 528 | |
0d143fe1 | 529 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
665c93a9 JB |
530 | |
531 | master = container_of(sdata->bss, | |
532 | struct ieee80211_sub_if_data, u.ap); | |
533 | sdata->control_port_protocol = | |
534 | master->control_port_protocol; | |
535 | sdata->control_port_no_encrypt = | |
536 | master->control_port_no_encrypt; | |
0d143fe1 | 537 | break; |
665c93a9 | 538 | } |
0d143fe1 JB |
539 | case NL80211_IFTYPE_AP: |
540 | sdata->bss = &sdata->u.ap; | |
541 | break; | |
542 | case NL80211_IFTYPE_MESH_POINT: | |
0d143fe1 JB |
543 | case NL80211_IFTYPE_STATION: |
544 | case NL80211_IFTYPE_MONITOR: | |
545 | case NL80211_IFTYPE_ADHOC: | |
f142c6b9 | 546 | case NL80211_IFTYPE_P2P_DEVICE: |
0d143fe1 JB |
547 | /* no special treatment */ |
548 | break; | |
549 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 550 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
551 | case NL80211_IFTYPE_P2P_CLIENT: |
552 | case NL80211_IFTYPE_P2P_GO: | |
0d143fe1 JB |
553 | /* cannot happen */ |
554 | WARN_ON(1); | |
555 | break; | |
556 | } | |
557 | ||
558 | if (local->open_count == 0) { | |
24487981 | 559 | res = drv_start(local); |
0d143fe1 JB |
560 | if (res) |
561 | goto err_del_bss; | |
4e6cbfd0 JL |
562 | if (local->ops->napi_poll) |
563 | napi_enable(&local->napi); | |
e8975581 JB |
564 | /* we're brought up, everything changes */ |
565 | hw_reconf_flags = ~0; | |
1f87f7d3 | 566 | ieee80211_led_radio(local, true); |
67408c8c JB |
567 | ieee80211_mod_tpt_led_trig(local, |
568 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
0d143fe1 JB |
569 | } |
570 | ||
571 | /* | |
bf533e0b JB |
572 | * Copy the hopefully now-present MAC address to |
573 | * this interface, if it has the special null one. | |
0d143fe1 | 574 | */ |
f142c6b9 | 575 | if (dev && is_zero_ether_addr(dev->dev_addr)) { |
bf533e0b JB |
576 | memcpy(dev->dev_addr, |
577 | local->hw.wiphy->perm_addr, | |
578 | ETH_ALEN); | |
579 | memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); | |
580 | ||
581 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
4d6c36fa JB |
582 | res = -EADDRNOTAVAIL; |
583 | goto err_stop; | |
0adc23f5 | 584 | } |
0d143fe1 JB |
585 | } |
586 | ||
0d143fe1 JB |
587 | switch (sdata->vif.type) { |
588 | case NL80211_IFTYPE_AP_VLAN: | |
3edaf3e6 JB |
589 | /* no need to tell driver, but set carrier */ |
590 | if (rtnl_dereference(sdata->bss->beacon)) | |
591 | netif_carrier_on(dev); | |
592 | else | |
593 | netif_carrier_off(dev); | |
0d143fe1 JB |
594 | break; |
595 | case NL80211_IFTYPE_MONITOR: | |
596 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
597 | local->cooked_mntrs++; | |
598 | break; | |
599 | } | |
600 | ||
075e0847 JB |
601 | if (local->monitors == 0 && local->open_count == 0) { |
602 | res = ieee80211_add_virtual_monitor(local); | |
603 | if (res) | |
604 | goto err_stop; | |
605 | } | |
606 | ||
0d143fe1 JB |
607 | /* must be before the call to ieee80211_configure_filter */ |
608 | local->monitors++; | |
e8975581 | 609 | if (local->monitors == 1) { |
0869aea0 JB |
610 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
611 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
e8975581 | 612 | } |
0d143fe1 | 613 | |
85416a4f | 614 | ieee80211_adjust_monitor_flags(sdata, 1); |
0d143fe1 | 615 | ieee80211_configure_filter(local); |
53e9b1de DG |
616 | |
617 | netif_carrier_on(dev); | |
0d143fe1 | 618 | break; |
0d143fe1 | 619 | default: |
34d4bc4d | 620 | if (coming_up) { |
075e0847 JB |
621 | ieee80211_del_virtual_monitor(local); |
622 | ||
7b7eab6f | 623 | res = drv_add_interface(local, sdata); |
34d4bc4d JB |
624 | if (res) |
625 | goto err_stop; | |
3a25a8c8 JB |
626 | res = ieee80211_check_queues(sdata); |
627 | if (res) | |
628 | goto err_del_interface; | |
34d4bc4d | 629 | } |
0d143fe1 | 630 | |
29cbe68c | 631 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
e3b90ca2 | 632 | local->fif_pspoll++; |
7be5086d | 633 | local->fif_probe_req++; |
e3b90ca2 | 634 | |
e3b90ca2 | 635 | ieee80211_configure_filter(local); |
7be5086d JB |
636 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
637 | local->fif_probe_req++; | |
a3c9aa51 | 638 | } |
e3b90ca2 | 639 | |
f142c6b9 JB |
640 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) |
641 | changed |= ieee80211_reset_erp_info(sdata); | |
0d143fe1 | 642 | ieee80211_bss_info_change_notify(sdata, changed); |
0d143fe1 | 643 | |
c405c629 JB |
644 | switch (sdata->vif.type) { |
645 | case NL80211_IFTYPE_STATION: | |
646 | case NL80211_IFTYPE_ADHOC: | |
647 | case NL80211_IFTYPE_AP: | |
648 | case NL80211_IFTYPE_MESH_POINT: | |
0d143fe1 | 649 | netif_carrier_off(dev); |
c405c629 | 650 | break; |
1411af15 | 651 | case NL80211_IFTYPE_WDS: |
f142c6b9 | 652 | case NL80211_IFTYPE_P2P_DEVICE: |
1411af15 | 653 | break; |
c405c629 | 654 | default: |
0d143fe1 | 655 | netif_carrier_on(dev); |
c405c629 | 656 | } |
59034591 EP |
657 | |
658 | /* | |
659 | * set default queue parameters so drivers don't | |
660 | * need to initialise the hardware if the hardware | |
661 | * doesn't start up with sane defaults | |
662 | */ | |
3abead59 | 663 | ieee80211_set_wmm_default(sdata, true); |
0d143fe1 JB |
664 | } |
665 | ||
2d2080c3 JB |
666 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
667 | ||
0d143fe1 JB |
668 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
669 | /* Create STA entry for the WDS peer */ | |
670 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
671 | GFP_KERNEL); | |
672 | if (!sta) { | |
673 | res = -ENOMEM; | |
674 | goto err_del_interface; | |
675 | } | |
676 | ||
83d5cc01 JB |
677 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
678 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
679 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
0d143fe1 JB |
680 | |
681 | res = sta_info_insert(sta); | |
682 | if (res) { | |
683 | /* STA has been freed */ | |
684 | goto err_del_interface; | |
685 | } | |
1be7fe8d BJ |
686 | |
687 | rate_control_rate_init(sta); | |
1411af15 | 688 | netif_carrier_on(dev); |
f142c6b9 JB |
689 | } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
690 | rcu_assign_pointer(local->p2p_sdata, sdata); | |
0d143fe1 JB |
691 | } |
692 | ||
0d143fe1 JB |
693 | /* |
694 | * set_multicast_list will be invoked by the networking core | |
695 | * which will check whether any increments here were done in | |
696 | * error and sync them down to the hardware as filter flags. | |
697 | */ | |
698 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
699 | atomic_inc(&local->iff_allmultis); | |
700 | ||
701 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
702 | atomic_inc(&local->iff_promiscs); | |
703 | ||
7da7cc1d | 704 | mutex_lock(&local->mtx); |
5cff20e6 | 705 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
7da7cc1d | 706 | mutex_unlock(&local->mtx); |
5cff20e6 | 707 | |
34d4bc4d JB |
708 | if (coming_up) |
709 | local->open_count++; | |
710 | ||
59034591 | 711 | if (hw_reconf_flags) |
e8975581 | 712 | ieee80211_hw_config(local, hw_reconf_flags); |
0d143fe1 | 713 | |
10f644a4 | 714 | ieee80211_recalc_ps(local, -1); |
965bedad | 715 | |
f142c6b9 JB |
716 | if (dev) |
717 | netif_tx_start_all_queues(dev); | |
0d143fe1 JB |
718 | |
719 | return 0; | |
720 | err_del_interface: | |
7b7eab6f | 721 | drv_remove_interface(local, sdata); |
0d143fe1 | 722 | err_stop: |
24487981 JB |
723 | if (!local->open_count) |
724 | drv_stop(local); | |
0d143fe1 JB |
725 | err_del_bss: |
726 | sdata->bss = NULL; | |
727 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
728 | list_del(&sdata->u.vlan.list); | |
4d6c36fa | 729 | /* might already be clear but that doesn't matter */ |
2d2080c3 | 730 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
0d143fe1 JB |
731 | return res; |
732 | } | |
733 | ||
34d4bc4d | 734 | static int ieee80211_open(struct net_device *dev) |
0d143fe1 JB |
735 | { |
736 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
34d4bc4d JB |
737 | int err; |
738 | ||
739 | /* fail early if user set an invalid address */ | |
2fcf2824 | 740 | if (!is_valid_ether_addr(dev->dev_addr)) |
34d4bc4d JB |
741 | return -EADDRNOTAVAIL; |
742 | ||
743 | err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); | |
744 | if (err) | |
745 | return err; | |
746 | ||
f142c6b9 | 747 | return ieee80211_do_open(&sdata->wdev, true); |
34d4bc4d JB |
748 | } |
749 | ||
750 | static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, | |
751 | bool going_down) | |
752 | { | |
0d143fe1 | 753 | struct ieee80211_local *local = sdata->local; |
5061b0c2 JB |
754 | unsigned long flags; |
755 | struct sk_buff *skb, *tmp; | |
e8975581 | 756 | u32 hw_reconf_flags = 0; |
5061b0c2 | 757 | int i; |
0d143fe1 | 758 | |
c29acf20 RM |
759 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
760 | ||
e2fd5dbc | 761 | if (rcu_access_pointer(local->scan_sdata) == sdata) |
352ffad6 BC |
762 | ieee80211_scan_cancel(local); |
763 | ||
0d143fe1 JB |
764 | /* |
765 | * Stop TX on this interface first. | |
766 | */ | |
f142c6b9 JB |
767 | if (sdata->dev) |
768 | netif_tx_stop_all_queues(sdata->dev); | |
0d143fe1 | 769 | |
2eb278e0 | 770 | ieee80211_roc_purge(sdata); |
af6b6374 | 771 | |
0d143fe1 JB |
772 | /* |
773 | * Remove all stations associated with this interface. | |
774 | * | |
775 | * This must be done before calling ops->remove_interface() | |
776 | * because otherwise we can later invoke ops->sta_notify() | |
777 | * whenever the STAs are removed, and that invalidates driver | |
778 | * assumptions about always getting a vif pointer that is valid | |
779 | * (because if we remove a STA after ops->remove_interface() | |
780 | * the driver will have removed the vif info already!) | |
781 | * | |
b9dcf712 JB |
782 | * This is relevant only in AP, WDS and mesh modes, since in |
783 | * all other modes we've already removed all stations when | |
784 | * disconnecting etc. | |
0d143fe1 JB |
785 | */ |
786 | sta_info_flush(local, sdata); | |
787 | ||
788 | /* | |
789 | * Don't count this interface for promisc/allmulti while it | |
790 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
791 | * on the master interface which will sync these down to the | |
792 | * hardware as filter flags. | |
793 | */ | |
794 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
795 | atomic_dec(&local->iff_allmultis); | |
796 | ||
797 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
798 | atomic_dec(&local->iff_promiscs); | |
799 | ||
7be5086d | 800 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
e3b90ca2 | 801 | local->fif_pspoll--; |
7be5086d JB |
802 | local->fif_probe_req--; |
803 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
804 | local->fif_probe_req--; | |
805 | } | |
e3b90ca2 | 806 | |
f142c6b9 JB |
807 | if (sdata->dev) { |
808 | netif_addr_lock_bh(sdata->dev); | |
809 | spin_lock_bh(&local->filter_lock); | |
810 | __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, | |
811 | sdata->dev->addr_len); | |
812 | spin_unlock_bh(&local->filter_lock); | |
813 | netif_addr_unlock_bh(sdata->dev); | |
3b8d81e0 | 814 | |
f142c6b9 JB |
815 | ieee80211_configure_filter(local); |
816 | } | |
3ac64bee | 817 | |
7cbf0ba5 VN |
818 | del_timer_sync(&local->dynamic_ps_timer); |
819 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 | 820 | |
04ecd257 JB |
821 | cancel_work_sync(&sdata->recalc_smps); |
822 | ||
0d143fe1 JB |
823 | /* APs need special treatment */ |
824 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
57c9fff3 | 825 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
0d143fe1 JB |
826 | |
827 | /* down all dependent devices, that is VLANs */ | |
57c9fff3 | 828 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
0d143fe1 JB |
829 | u.vlan.list) |
830 | dev_close(vlan->dev); | |
831 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
afa762f6 EP |
832 | } else if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
833 | ieee80211_mgd_stop(sdata); | |
0d143fe1 JB |
834 | } |
835 | ||
34d4bc4d JB |
836 | if (going_down) |
837 | local->open_count--; | |
0d143fe1 JB |
838 | |
839 | switch (sdata->vif.type) { | |
840 | case NL80211_IFTYPE_AP_VLAN: | |
841 | list_del(&sdata->u.vlan.list); | |
842 | /* no need to tell driver */ | |
843 | break; | |
844 | case NL80211_IFTYPE_MONITOR: | |
845 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
846 | local->cooked_mntrs--; | |
847 | break; | |
848 | } | |
849 | ||
850 | local->monitors--; | |
e8975581 | 851 | if (local->monitors == 0) { |
0869aea0 JB |
852 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
853 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; | |
075e0847 | 854 | ieee80211_del_virtual_monitor(local); |
e8975581 | 855 | } |
0d143fe1 | 856 | |
85416a4f | 857 | ieee80211_adjust_monitor_flags(sdata, -1); |
0d143fe1 | 858 | ieee80211_configure_filter(local); |
0d143fe1 | 859 | break; |
f142c6b9 JB |
860 | case NL80211_IFTYPE_P2P_DEVICE: |
861 | /* relies on synchronize_rcu() below */ | |
862 | rcu_assign_pointer(local->p2p_sdata, NULL); | |
863 | /* fall through */ | |
0d143fe1 | 864 | default: |
c1475ca9 | 865 | flush_work(&sdata->work); |
35f20c14 JB |
866 | /* |
867 | * When we get here, the interface is marked down. | |
b22cfcfc | 868 | * Call rcu_barrier() to wait both for the RX path |
35f20c14 | 869 | * should it be using the interface and enqueuing |
b22cfcfc EP |
870 | * frames at this very time on another CPU, and |
871 | * for the sta free call_rcu callbacks. | |
35f20c14 | 872 | */ |
b22cfcfc EP |
873 | rcu_barrier(); |
874 | ||
875 | /* | |
876 | * free_sta_rcu() enqueues a work for the actual | |
877 | * sta cleanup, so we need to flush it while | |
878 | * sdata is still valid. | |
879 | */ | |
880 | flush_workqueue(local->workqueue); | |
881 | ||
35f20c14 JB |
882 | skb_queue_purge(&sdata->skb_queue); |
883 | ||
b9dcf712 JB |
884 | /* |
885 | * Free all remaining keys, there shouldn't be any, | |
886 | * except maybe group keys in AP more or WDS? | |
887 | */ | |
ad0e2b5a | 888 | ieee80211_free_keys(sdata); |
b9dcf712 | 889 | |
34d4bc4d | 890 | if (going_down) |
7b7eab6f | 891 | drv_remove_interface(local, sdata); |
0d143fe1 JB |
892 | } |
893 | ||
894 | sdata->bss = NULL; | |
895 | ||
7da7cc1d | 896 | mutex_lock(&local->mtx); |
5cff20e6 | 897 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
7da7cc1d | 898 | mutex_unlock(&local->mtx); |
5cff20e6 JB |
899 | |
900 | ieee80211_recalc_ps(local, -1); | |
901 | ||
0d143fe1 | 902 | if (local->open_count == 0) { |
4e6cbfd0 JL |
903 | if (local->ops->napi_poll) |
904 | napi_disable(&local->napi); | |
ea77f12f | 905 | ieee80211_clear_tx_pending(local); |
84f6a01c | 906 | ieee80211_stop_device(local); |
0d143fe1 | 907 | |
e8975581 JB |
908 | /* no reconfiguring after stop! */ |
909 | hw_reconf_flags = 0; | |
0d143fe1 JB |
910 | } |
911 | ||
e8975581 | 912 | /* do after stop to avoid reconfiguring when we stop anyway */ |
55de908a | 913 | if (hw_reconf_flags) |
e8975581 JB |
914 | ieee80211_hw_config(local, hw_reconf_flags); |
915 | ||
5061b0c2 JB |
916 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
917 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
918 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { | |
919 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
920 | if (info->control.vif == &sdata->vif) { | |
921 | __skb_unlink(skb, &local->pending[i]); | |
d4fa14cd | 922 | ieee80211_free_txskb(&local->hw, skb); |
5061b0c2 JB |
923 | } |
924 | } | |
925 | } | |
926 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
075e0847 JB |
927 | |
928 | if (local->monitors == local->open_count && local->monitors > 0) | |
929 | ieee80211_add_virtual_monitor(local); | |
34d4bc4d JB |
930 | } |
931 | ||
932 | static int ieee80211_stop(struct net_device *dev) | |
933 | { | |
934 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
935 | ||
936 | ieee80211_do_stop(sdata, true); | |
5061b0c2 | 937 | |
0d143fe1 JB |
938 | return 0; |
939 | } | |
940 | ||
941 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
942 | { | |
0d143fe1 | 943 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 944 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
945 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
946 | ||
947 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
948 | promisc = !!(dev->flags & IFF_PROMISC); | |
949 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
950 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
951 | ||
952 | if (allmulti != sdata_allmulti) { | |
953 | if (dev->flags & IFF_ALLMULTI) | |
954 | atomic_inc(&local->iff_allmultis); | |
955 | else | |
956 | atomic_dec(&local->iff_allmultis); | |
957 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
958 | } | |
959 | ||
960 | if (promisc != sdata_promisc) { | |
961 | if (dev->flags & IFF_PROMISC) | |
962 | atomic_inc(&local->iff_promiscs); | |
963 | else | |
964 | atomic_dec(&local->iff_promiscs); | |
965 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
966 | } | |
3b8d81e0 | 967 | spin_lock_bh(&local->filter_lock); |
22bedad3 | 968 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
3b8d81e0 | 969 | spin_unlock_bh(&local->filter_lock); |
3ac64bee | 970 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
0d143fe1 JB |
971 | } |
972 | ||
75636525 JB |
973 | /* |
974 | * Called when the netdev is removed or, by the code below, before | |
975 | * the interface type changes. | |
976 | */ | |
f142c6b9 | 977 | static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 978 | { |
75636525 | 979 | struct ieee80211_local *local = sdata->local; |
75636525 | 980 | int flushed; |
f0706e82 JB |
981 | int i; |
982 | ||
75636525 JB |
983 | /* free extra data */ |
984 | ieee80211_free_keys(sdata); | |
985 | ||
aee14ceb JM |
986 | ieee80211_debugfs_remove_netdev(sdata); |
987 | ||
f0706e82 | 988 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
989 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
990 | sdata->fragment_next = 0; | |
11a843b7 | 991 | |
b9dcf712 JB |
992 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
993 | mesh_rmc_free(sdata); | |
75636525 JB |
994 | |
995 | flushed = sta_info_flush(local, sdata); | |
996 | WARN_ON(flushed); | |
f0706e82 JB |
997 | } |
998 | ||
f142c6b9 JB |
999 | static void ieee80211_uninit(struct net_device *dev) |
1000 | { | |
1001 | ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); | |
1002 | } | |
1003 | ||
cf0277e7 JB |
1004 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
1005 | struct sk_buff *skb) | |
1006 | { | |
1007 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
1008 | } | |
1009 | ||
587e729e JB |
1010 | static const struct net_device_ops ieee80211_dataif_ops = { |
1011 | .ndo_open = ieee80211_open, | |
1012 | .ndo_stop = ieee80211_stop, | |
f142c6b9 | 1013 | .ndo_uninit = ieee80211_uninit, |
587e729e | 1014 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
afc4b13d | 1015 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
587e729e | 1016 | .ndo_change_mtu = ieee80211_change_mtu, |
47846c9b | 1017 | .ndo_set_mac_address = ieee80211_change_mac, |
cf0277e7 | 1018 | .ndo_select_queue = ieee80211_netdev_select_queue, |
587e729e JB |
1019 | }; |
1020 | ||
cf0277e7 JB |
1021 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
1022 | struct sk_buff *skb) | |
1023 | { | |
1024 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1025 | struct ieee80211_local *local = sdata->local; | |
1026 | struct ieee80211_hdr *hdr; | |
1027 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; | |
1028 | ||
32c5057b | 1029 | if (local->hw.queues < IEEE80211_NUM_ACS) |
cf0277e7 JB |
1030 | return 0; |
1031 | ||
1032 | if (skb->len < 4 || | |
b49bb574 | 1033 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
cf0277e7 JB |
1034 | return 0; /* doesn't matter, frame will be dropped */ |
1035 | ||
b49bb574 | 1036 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
cf0277e7 | 1037 | |
00e96dec | 1038 | return ieee80211_select_queue_80211(sdata, skb, hdr); |
cf0277e7 JB |
1039 | } |
1040 | ||
587e729e JB |
1041 | static const struct net_device_ops ieee80211_monitorif_ops = { |
1042 | .ndo_open = ieee80211_open, | |
1043 | .ndo_stop = ieee80211_stop, | |
f142c6b9 | 1044 | .ndo_uninit = ieee80211_uninit, |
587e729e | 1045 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
afc4b13d | 1046 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
587e729e JB |
1047 | .ndo_change_mtu = ieee80211_change_mtu, |
1048 | .ndo_set_mac_address = eth_mac_addr, | |
cf0277e7 | 1049 | .ndo_select_queue = ieee80211_monitor_select_queue, |
587e729e JB |
1050 | }; |
1051 | ||
1052 | static void ieee80211_if_setup(struct net_device *dev) | |
1053 | { | |
1054 | ether_setup(dev); | |
550fd08c | 1055 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
587e729e | 1056 | dev->netdev_ops = &ieee80211_dataif_ops; |
587e729e JB |
1057 | dev->destructor = free_netdev; |
1058 | } | |
1059 | ||
1fa57d01 JB |
1060 | static void ieee80211_iface_work(struct work_struct *work) |
1061 | { | |
1062 | struct ieee80211_sub_if_data *sdata = | |
1063 | container_of(work, struct ieee80211_sub_if_data, work); | |
1064 | struct ieee80211_local *local = sdata->local; | |
1065 | struct sk_buff *skb; | |
344eec67 | 1066 | struct sta_info *sta; |
c1475ca9 | 1067 | struct ieee80211_ra_tid *ra_tid; |
1fa57d01 JB |
1068 | |
1069 | if (!ieee80211_sdata_running(sdata)) | |
1070 | return; | |
1071 | ||
1072 | if (local->scanning) | |
1073 | return; | |
1074 | ||
1075 | /* | |
1076 | * ieee80211_queue_work() should have picked up most cases, | |
1077 | * here we'll pick the rest. | |
1078 | */ | |
1079 | if (WARN(local->suspended, | |
1080 | "interface work scheduled while going to suspend\n")) | |
1081 | return; | |
1082 | ||
1083 | /* first process frames */ | |
1084 | while ((skb = skb_dequeue(&sdata->skb_queue))) { | |
bed7ee6e JB |
1085 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
1086 | ||
c1475ca9 JB |
1087 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
1088 | ra_tid = (void *)&skb->cb; | |
1089 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
1090 | ra_tid->tid); | |
1091 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { | |
1092 | ra_tid = (void *)&skb->cb; | |
1093 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, | |
1094 | ra_tid->tid); | |
1095 | } else if (ieee80211_is_action(mgmt->frame_control) && | |
1096 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { | |
bed7ee6e | 1097 | int len = skb->len; |
bed7ee6e | 1098 | |
a93e3644 | 1099 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 1100 | sta = sta_info_get_bss(sdata, mgmt->sa); |
bed7ee6e JB |
1101 | if (sta) { |
1102 | switch (mgmt->u.action.u.addba_req.action_code) { | |
1103 | case WLAN_ACTION_ADDBA_REQ: | |
1104 | ieee80211_process_addba_request( | |
1105 | local, sta, mgmt, len); | |
1106 | break; | |
1107 | case WLAN_ACTION_ADDBA_RESP: | |
1108 | ieee80211_process_addba_resp(local, sta, | |
1109 | mgmt, len); | |
1110 | break; | |
1111 | case WLAN_ACTION_DELBA: | |
1112 | ieee80211_process_delba(sdata, sta, | |
1113 | mgmt, len); | |
1114 | break; | |
1115 | default: | |
1116 | WARN_ON(1); | |
1117 | break; | |
1118 | } | |
1119 | } | |
a93e3644 | 1120 | mutex_unlock(&local->sta_mtx); |
344eec67 JB |
1121 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
1122 | struct ieee80211_hdr *hdr = (void *)mgmt; | |
1123 | /* | |
1124 | * So the frame isn't mgmt, but frame_control | |
1125 | * is at the right place anyway, of course, so | |
1126 | * the if statement is correct. | |
1127 | * | |
1128 | * Warn if we have other data frame types here, | |
1129 | * they must not get here. | |
1130 | */ | |
1131 | WARN_ON(hdr->frame_control & | |
1132 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); | |
1133 | WARN_ON(!(hdr->seq_ctrl & | |
1134 | cpu_to_le16(IEEE80211_SCTL_FRAG))); | |
1135 | /* | |
1136 | * This was a fragment of a frame, received while | |
1137 | * a block-ack session was active. That cannot be | |
1138 | * right, so terminate the session. | |
1139 | */ | |
a93e3644 | 1140 | mutex_lock(&local->sta_mtx); |
875ae5f6 | 1141 | sta = sta_info_get_bss(sdata, mgmt->sa); |
344eec67 JB |
1142 | if (sta) { |
1143 | u16 tid = *ieee80211_get_qos_ctl(hdr) & | |
1144 | IEEE80211_QOS_CTL_TID_MASK; | |
1145 | ||
1146 | __ieee80211_stop_rx_ba_session( | |
1147 | sta, tid, WLAN_BACK_RECIPIENT, | |
53f73c09 JB |
1148 | WLAN_REASON_QSTA_REQUIRE_SETUP, |
1149 | true); | |
344eec67 | 1150 | } |
a93e3644 | 1151 | mutex_unlock(&local->sta_mtx); |
bed7ee6e | 1152 | } else switch (sdata->vif.type) { |
1fa57d01 JB |
1153 | case NL80211_IFTYPE_STATION: |
1154 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
1155 | break; | |
1156 | case NL80211_IFTYPE_ADHOC: | |
1157 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
1158 | break; | |
1159 | case NL80211_IFTYPE_MESH_POINT: | |
1160 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
1161 | break; | |
1162 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
1163 | break; | |
1164 | default: | |
1165 | WARN(1, "frame for unexpected interface type"); | |
1fa57d01 JB |
1166 | break; |
1167 | } | |
36b3a628 JB |
1168 | |
1169 | kfree_skb(skb); | |
1fa57d01 JB |
1170 | } |
1171 | ||
1172 | /* then other type-dependent work */ | |
1173 | switch (sdata->vif.type) { | |
1174 | case NL80211_IFTYPE_STATION: | |
1175 | ieee80211_sta_work(sdata); | |
1176 | break; | |
1177 | case NL80211_IFTYPE_ADHOC: | |
1178 | ieee80211_ibss_work(sdata); | |
1179 | break; | |
1180 | case NL80211_IFTYPE_MESH_POINT: | |
1181 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
1182 | break; | |
1183 | ieee80211_mesh_work(sdata); | |
1184 | break; | |
1185 | default: | |
1186 | break; | |
1187 | } | |
1188 | } | |
1189 | ||
04ecd257 JB |
1190 | static void ieee80211_recalc_smps_work(struct work_struct *work) |
1191 | { | |
1192 | struct ieee80211_sub_if_data *sdata = | |
1193 | container_of(work, struct ieee80211_sub_if_data, recalc_smps); | |
1194 | ||
1195 | ieee80211_recalc_smps(sdata); | |
1196 | } | |
1fa57d01 | 1197 | |
75636525 JB |
1198 | /* |
1199 | * Helper function to initialise an interface to a specific type. | |
1200 | */ | |
1201 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 1202 | enum nl80211_iftype type) |
f0706e82 | 1203 | { |
75636525 JB |
1204 | /* clear type-dependent union */ |
1205 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
1206 | ||
1207 | /* and set some type-dependent values */ | |
1208 | sdata->vif.type = type; | |
2ca27bcf | 1209 | sdata->vif.p2p = false; |
60719ffd | 1210 | sdata->wdev.iftype = type; |
75636525 | 1211 | |
a621fa4d JB |
1212 | sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
1213 | sdata->control_port_no_encrypt = false; | |
1214 | ||
b53be792 SW |
1215 | sdata->noack_map = 0; |
1216 | ||
f142c6b9 JB |
1217 | /* only monitor/p2p-device differ */ |
1218 | if (sdata->dev) { | |
1219 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; | |
1220 | sdata->dev->type = ARPHRD_ETHER; | |
1221 | } | |
75636525 | 1222 | |
35f20c14 | 1223 | skb_queue_head_init(&sdata->skb_queue); |
1fa57d01 | 1224 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
04ecd257 | 1225 | INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); |
35f20c14 | 1226 | |
75636525 | 1227 | switch (type) { |
2ca27bcf JB |
1228 | case NL80211_IFTYPE_P2P_GO: |
1229 | type = NL80211_IFTYPE_AP; | |
1230 | sdata->vif.type = type; | |
1231 | sdata->vif.p2p = true; | |
1232 | /* fall through */ | |
05c914fe | 1233 | case NL80211_IFTYPE_AP: |
d012a605 | 1234 | skb_queue_head_init(&sdata->u.ap.ps.bc_buf); |
75636525 JB |
1235 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
1236 | break; | |
2ca27bcf JB |
1237 | case NL80211_IFTYPE_P2P_CLIENT: |
1238 | type = NL80211_IFTYPE_STATION; | |
1239 | sdata->vif.type = type; | |
1240 | sdata->vif.p2p = true; | |
1241 | /* fall through */ | |
05c914fe | 1242 | case NL80211_IFTYPE_STATION: |
9c6bd790 | 1243 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 1244 | break; |
46900298 JB |
1245 | case NL80211_IFTYPE_ADHOC: |
1246 | ieee80211_ibss_setup_sdata(sdata); | |
1247 | break; | |
05c914fe | 1248 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
1249 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
1250 | ieee80211_mesh_init_sdata(sdata); | |
1251 | break; | |
05c914fe | 1252 | case NL80211_IFTYPE_MONITOR: |
75636525 | 1253 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
587e729e | 1254 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
75636525 JB |
1255 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
1256 | MONITOR_FLAG_OTHER_BSS; | |
1257 | break; | |
05c914fe JB |
1258 | case NL80211_IFTYPE_WDS: |
1259 | case NL80211_IFTYPE_AP_VLAN: | |
98104fde | 1260 | case NL80211_IFTYPE_P2P_DEVICE: |
f142c6b9 | 1261 | break; |
05c914fe | 1262 | case NL80211_IFTYPE_UNSPECIFIED: |
2e161f78 | 1263 | case NUM_NL80211_IFTYPES: |
75636525 JB |
1264 | BUG(); |
1265 | break; | |
1266 | } | |
1267 | ||
1268 | ieee80211_debugfs_add_netdev(sdata); | |
1269 | } | |
1270 | ||
34d4bc4d JB |
1271 | static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
1272 | enum nl80211_iftype type) | |
1273 | { | |
1274 | struct ieee80211_local *local = sdata->local; | |
1275 | int ret, err; | |
2ca27bcf JB |
1276 | enum nl80211_iftype internal_type = type; |
1277 | bool p2p = false; | |
34d4bc4d JB |
1278 | |
1279 | ASSERT_RTNL(); | |
1280 | ||
1281 | if (!local->ops->change_interface) | |
1282 | return -EBUSY; | |
1283 | ||
1284 | switch (sdata->vif.type) { | |
1285 | case NL80211_IFTYPE_AP: | |
1286 | case NL80211_IFTYPE_STATION: | |
1287 | case NL80211_IFTYPE_ADHOC: | |
1288 | /* | |
1289 | * Could maybe also all others here? | |
1290 | * Just not sure how that interacts | |
1291 | * with the RX/config path e.g. for | |
1292 | * mesh. | |
1293 | */ | |
1294 | break; | |
1295 | default: | |
1296 | return -EBUSY; | |
1297 | } | |
1298 | ||
1299 | switch (type) { | |
1300 | case NL80211_IFTYPE_AP: | |
1301 | case NL80211_IFTYPE_STATION: | |
1302 | case NL80211_IFTYPE_ADHOC: | |
1303 | /* | |
1304 | * Could probably support everything | |
1305 | * but WDS here (WDS do_open can fail | |
1306 | * under memory pressure, which this | |
1307 | * code isn't prepared to handle). | |
1308 | */ | |
1309 | break; | |
2ca27bcf JB |
1310 | case NL80211_IFTYPE_P2P_CLIENT: |
1311 | p2p = true; | |
1312 | internal_type = NL80211_IFTYPE_STATION; | |
1313 | break; | |
1314 | case NL80211_IFTYPE_P2P_GO: | |
1315 | p2p = true; | |
1316 | internal_type = NL80211_IFTYPE_AP; | |
1317 | break; | |
34d4bc4d JB |
1318 | default: |
1319 | return -EBUSY; | |
1320 | } | |
1321 | ||
2ca27bcf | 1322 | ret = ieee80211_check_concurrent_iface(sdata, internal_type); |
34d4bc4d JB |
1323 | if (ret) |
1324 | return ret; | |
1325 | ||
1326 | ieee80211_do_stop(sdata, false); | |
1327 | ||
f142c6b9 | 1328 | ieee80211_teardown_sdata(sdata); |
34d4bc4d | 1329 | |
2ca27bcf | 1330 | ret = drv_change_interface(local, sdata, internal_type, p2p); |
34d4bc4d JB |
1331 | if (ret) |
1332 | type = sdata->vif.type; | |
1333 | ||
3a25a8c8 JB |
1334 | /* |
1335 | * Ignore return value here, there's not much we can do since | |
1336 | * the driver changed the interface type internally already. | |
1337 | * The warnings will hopefully make driver authors fix it :-) | |
1338 | */ | |
1339 | ieee80211_check_queues(sdata); | |
1340 | ||
34d4bc4d JB |
1341 | ieee80211_setup_sdata(sdata, type); |
1342 | ||
f142c6b9 | 1343 | err = ieee80211_do_open(&sdata->wdev, false); |
34d4bc4d JB |
1344 | WARN(err, "type change: do_open returned %d", err); |
1345 | ||
1346 | return ret; | |
1347 | } | |
1348 | ||
f3947e2d | 1349 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 1350 | enum nl80211_iftype type) |
75636525 | 1351 | { |
34d4bc4d JB |
1352 | int ret; |
1353 | ||
f3947e2d JB |
1354 | ASSERT_RTNL(); |
1355 | ||
2ca27bcf | 1356 | if (type == ieee80211_vif_type_p2p(&sdata->vif)) |
f3947e2d JB |
1357 | return 0; |
1358 | ||
34d4bc4d JB |
1359 | if (ieee80211_sdata_running(sdata)) { |
1360 | ret = ieee80211_runtime_change_iftype(sdata, type); | |
1361 | if (ret) | |
1362 | return ret; | |
1363 | } else { | |
1364 | /* Purge and reset type-dependent state. */ | |
f142c6b9 | 1365 | ieee80211_teardown_sdata(sdata); |
34d4bc4d JB |
1366 | ieee80211_setup_sdata(sdata, type); |
1367 | } | |
75636525 JB |
1368 | |
1369 | /* reset some values that shouldn't be kept across type changes */ | |
75636525 | 1370 | sdata->drop_unencrypted = 0; |
9bc383de JB |
1371 | if (type == NL80211_IFTYPE_STATION) |
1372 | sdata->u.mgd.use_4addr = false; | |
f3947e2d JB |
1373 | |
1374 | return 0; | |
f0706e82 JB |
1375 | } |
1376 | ||
fa9029f8 | 1377 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
f142c6b9 | 1378 | u8 *perm_addr, enum nl80211_iftype type) |
fa9029f8 JB |
1379 | { |
1380 | struct ieee80211_sub_if_data *sdata; | |
1381 | u64 mask, start, addr, val, inc; | |
1382 | u8 *m; | |
1383 | u8 tmp_addr[ETH_ALEN]; | |
1384 | int i; | |
1385 | ||
1386 | /* default ... something at least */ | |
f142c6b9 | 1387 | memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
fa9029f8 JB |
1388 | |
1389 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && | |
1390 | local->hw.wiphy->n_addresses <= 1) | |
1391 | return; | |
1392 | ||
fa9029f8 JB |
1393 | mutex_lock(&local->iflist_mtx); |
1394 | ||
1395 | switch (type) { | |
1396 | case NL80211_IFTYPE_MONITOR: | |
1397 | /* doesn't matter */ | |
1398 | break; | |
1399 | case NL80211_IFTYPE_WDS: | |
1400 | case NL80211_IFTYPE_AP_VLAN: | |
1401 | /* match up with an AP interface */ | |
1402 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1403 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1404 | continue; | |
f142c6b9 | 1405 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
fa9029f8 JB |
1406 | break; |
1407 | } | |
1408 | /* keep default if no AP interface present */ | |
1409 | break; | |
6d71117a JB |
1410 | case NL80211_IFTYPE_P2P_CLIENT: |
1411 | case NL80211_IFTYPE_P2P_GO: | |
1412 | if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) { | |
1413 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1414 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) | |
1415 | continue; | |
1416 | if (!ieee80211_sdata_running(sdata)) | |
1417 | continue; | |
1418 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); | |
1419 | goto out_unlock; | |
1420 | } | |
1421 | } | |
1422 | /* otherwise fall through */ | |
fa9029f8 JB |
1423 | default: |
1424 | /* assign a new address if possible -- try n_addresses first */ | |
1425 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { | |
1426 | bool used = false; | |
1427 | ||
1428 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1429 | if (memcmp(local->hw.wiphy->addresses[i].addr, | |
1430 | sdata->vif.addr, ETH_ALEN) == 0) { | |
1431 | used = true; | |
1432 | break; | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | if (!used) { | |
f142c6b9 | 1437 | memcpy(perm_addr, |
fa9029f8 JB |
1438 | local->hw.wiphy->addresses[i].addr, |
1439 | ETH_ALEN); | |
1440 | break; | |
1441 | } | |
1442 | } | |
1443 | ||
1444 | /* try mask if available */ | |
1445 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) | |
1446 | break; | |
1447 | ||
1448 | m = local->hw.wiphy->addr_mask; | |
1449 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1450 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1451 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1452 | ||
1453 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { | |
1454 | /* not a contiguous mask ... not handled now! */ | |
bdcbd8e0 | 1455 | pr_info("not contiguous\n"); |
fa9029f8 JB |
1456 | break; |
1457 | } | |
1458 | ||
1459 | m = local->hw.wiphy->perm_addr; | |
1460 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | | |
1461 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | | |
1462 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); | |
1463 | ||
1464 | inc = 1ULL<<__ffs64(mask); | |
1465 | val = (start & mask); | |
1466 | addr = (start & ~mask) | (val & mask); | |
1467 | do { | |
1468 | bool used = false; | |
1469 | ||
1470 | tmp_addr[5] = addr >> 0*8; | |
1471 | tmp_addr[4] = addr >> 1*8; | |
1472 | tmp_addr[3] = addr >> 2*8; | |
1473 | tmp_addr[2] = addr >> 3*8; | |
1474 | tmp_addr[1] = addr >> 4*8; | |
1475 | tmp_addr[0] = addr >> 5*8; | |
1476 | ||
1477 | val += inc; | |
1478 | ||
1479 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1480 | if (memcmp(tmp_addr, sdata->vif.addr, | |
1481 | ETH_ALEN) == 0) { | |
1482 | used = true; | |
1483 | break; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | if (!used) { | |
f142c6b9 | 1488 | memcpy(perm_addr, tmp_addr, ETH_ALEN); |
fa9029f8 JB |
1489 | break; |
1490 | } | |
1491 | addr = (start & ~mask) | (val & mask); | |
1492 | } while (addr != start); | |
1493 | ||
1494 | break; | |
1495 | } | |
1496 | ||
6d71117a | 1497 | out_unlock: |
fa9029f8 JB |
1498 | mutex_unlock(&local->iflist_mtx); |
1499 | } | |
1500 | ||
3e122be0 | 1501 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
84efbb84 | 1502 | struct wireless_dev **new_wdev, enum nl80211_iftype type, |
ee385855 | 1503 | struct vif_params *params) |
f0706e82 | 1504 | { |
f142c6b9 | 1505 | struct net_device *ndev = NULL; |
f0706e82 | 1506 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 1507 | int ret, i; |
ded81f6b | 1508 | int txqs = 1; |
f0706e82 JB |
1509 | |
1510 | ASSERT_RTNL(); | |
75636525 | 1511 | |
f142c6b9 JB |
1512 | if (type == NL80211_IFTYPE_P2P_DEVICE) { |
1513 | struct wireless_dev *wdev; | |
1514 | ||
1515 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, | |
1516 | GFP_KERNEL); | |
1517 | if (!sdata) | |
1518 | return -ENOMEM; | |
1519 | wdev = &sdata->wdev; | |
1520 | ||
1521 | sdata->dev = NULL; | |
1522 | strlcpy(sdata->name, name, IFNAMSIZ); | |
1523 | ieee80211_assign_perm_addr(local, wdev->address, type); | |
1524 | memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); | |
1525 | } else { | |
1526 | if (local->hw.queues >= IEEE80211_NUM_ACS) | |
1527 | txqs = IEEE80211_NUM_ACS; | |
1528 | ||
1529 | ndev = alloc_netdev_mqs(sizeof(*sdata) + | |
1530 | local->hw.vif_data_size, | |
1531 | name, ieee80211_if_setup, txqs, 1); | |
1532 | if (!ndev) | |
1533 | return -ENOMEM; | |
1534 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); | |
1535 | ||
1536 | ndev->needed_headroom = local->tx_headroom + | |
1537 | 4*6 /* four MAC addresses */ | |
1538 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
1539 | + 6 /* mesh */ | |
1540 | + 8 /* rfc1042/bridge tunnel */ | |
1541 | - ETH_HLEN /* ethernet hard_header_len */ | |
1542 | + IEEE80211_ENCRYPT_HEADROOM; | |
1543 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
1544 | ||
1545 | ret = dev_alloc_name(ndev, ndev->name); | |
1546 | if (ret < 0) { | |
1547 | free_netdev(ndev); | |
1548 | return ret; | |
1549 | } | |
1550 | ||
1551 | ieee80211_assign_perm_addr(local, ndev->perm_addr, type); | |
1552 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); | |
1553 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
1554 | ||
1555 | /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ | |
1556 | sdata = netdev_priv(ndev); | |
1557 | ndev->ieee80211_ptr = &sdata->wdev; | |
1558 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); | |
1559 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
1560 | ||
1561 | sdata->dev = ndev; | |
1562 | } | |
75636525 JB |
1563 | |
1564 | /* initialise type-independent data */ | |
f0706e82 | 1565 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 1566 | sdata->local = local; |
68542962 JO |
1567 | #ifdef CONFIG_INET |
1568 | sdata->arp_filter_state = true; | |
1569 | #endif | |
75636525 JB |
1570 | |
1571 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
1572 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
1573 | ||
1574 | INIT_LIST_HEAD(&sdata->key_list); | |
1575 | ||
37eb0b16 JM |
1576 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
1577 | struct ieee80211_supported_band *sband; | |
1578 | sband = local->hw.wiphy->bands[i]; | |
1579 | sdata->rc_rateidx_mask[i] = | |
1580 | sband ? (1 << sband->n_bitrates) - 1 : 0; | |
19468413 SW |
1581 | if (sband) |
1582 | memcpy(sdata->rc_rateidx_mcs_mask[i], | |
1583 | sband->ht_cap.mcs.rx_mask, | |
1584 | sizeof(sdata->rc_rateidx_mcs_mask[i])); | |
1585 | else | |
1586 | memset(sdata->rc_rateidx_mcs_mask[i], 0, | |
1587 | sizeof(sdata->rc_rateidx_mcs_mask[i])); | |
37eb0b16 | 1588 | } |
75636525 | 1589 | |
3a25a8c8 JB |
1590 | ieee80211_set_default_queues(sdata); |
1591 | ||
1ea6f9c0 JB |
1592 | sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
1593 | sdata->user_power_level = local->user_power_level; | |
1594 | ||
75636525 JB |
1595 | /* setup type-dependent data */ |
1596 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 | 1597 | |
f142c6b9 JB |
1598 | if (ndev) { |
1599 | if (params) { | |
1600 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1601 | if (type == NL80211_IFTYPE_STATION) | |
1602 | sdata->u.mgd.use_4addr = params->use_4addr; | |
1603 | } | |
9bc383de | 1604 | |
f142c6b9 | 1605 | ndev->features |= local->hw.netdev_features; |
72d78728 | 1606 | |
f142c6b9 JB |
1607 | ret = register_netdevice(ndev); |
1608 | if (ret) { | |
1609 | free_netdev(ndev); | |
1610 | return ret; | |
1611 | } | |
1612 | } | |
f0706e82 | 1613 | |
c771c9d8 | 1614 | mutex_lock(&local->iflist_mtx); |
79010420 | 1615 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
c771c9d8 | 1616 | mutex_unlock(&local->iflist_mtx); |
79010420 | 1617 | |
84efbb84 JB |
1618 | if (new_wdev) |
1619 | *new_wdev = &sdata->wdev; | |
f0706e82 | 1620 | |
f0706e82 | 1621 | return 0; |
f0706e82 JB |
1622 | } |
1623 | ||
f698d856 | 1624 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1625 | { |
f0706e82 | 1626 | ASSERT_RTNL(); |
11a843b7 | 1627 | |
c771c9d8 | 1628 | mutex_lock(&sdata->local->iflist_mtx); |
75636525 | 1629 | list_del_rcu(&sdata->list); |
c771c9d8 JB |
1630 | mutex_unlock(&sdata->local->iflist_mtx); |
1631 | ||
75636525 | 1632 | synchronize_rcu(); |
f142c6b9 JB |
1633 | |
1634 | if (sdata->dev) { | |
1635 | unregister_netdevice(sdata->dev); | |
1636 | } else { | |
1637 | cfg80211_unregister_wdev(&sdata->wdev); | |
1638 | kfree(sdata); | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) | |
1643 | { | |
1644 | if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) | |
1645 | return; | |
1646 | ieee80211_do_stop(sdata, true); | |
1647 | ieee80211_teardown_sdata(sdata); | |
f0706e82 JB |
1648 | } |
1649 | ||
75636525 JB |
1650 | /* |
1651 | * Remove all interfaces, may only be called at hardware unregistration | |
1652 | * time because it doesn't do RCU-safe list removals. | |
1653 | */ | |
1654 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 1655 | { |
75636525 | 1656 | struct ieee80211_sub_if_data *sdata, *tmp; |
efe117ab | 1657 | LIST_HEAD(unreg_list); |
f142c6b9 | 1658 | LIST_HEAD(wdev_list); |
f0706e82 JB |
1659 | |
1660 | ASSERT_RTNL(); | |
1661 | ||
efe117ab | 1662 | mutex_lock(&local->iflist_mtx); |
75636525 JB |
1663 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
1664 | list_del(&sdata->list); | |
c771c9d8 | 1665 | |
f142c6b9 JB |
1666 | if (sdata->dev) |
1667 | unregister_netdevice_queue(sdata->dev, &unreg_list); | |
1668 | else | |
1669 | list_add(&sdata->list, &wdev_list); | |
f0706e82 | 1670 | } |
efe117ab ED |
1671 | mutex_unlock(&local->iflist_mtx); |
1672 | unregister_netdevice_many(&unreg_list); | |
5f04d506 | 1673 | list_del(&unreg_list); |
f142c6b9 JB |
1674 | |
1675 | list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { | |
1676 | list_del(&sdata->list); | |
1677 | cfg80211_unregister_wdev(&sdata->wdev); | |
1678 | kfree(sdata); | |
1679 | } | |
f0706e82 | 1680 | } |
5cff20e6 | 1681 | |
47846c9b JB |
1682 | static int netdev_notify(struct notifier_block *nb, |
1683 | unsigned long state, | |
1684 | void *ndev) | |
1685 | { | |
1686 | struct net_device *dev = ndev; | |
1687 | struct ieee80211_sub_if_data *sdata; | |
1688 | ||
1689 | if (state != NETDEV_CHANGENAME) | |
1690 | return 0; | |
1691 | ||
1692 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
1693 | return 0; | |
1694 | ||
1695 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
1696 | return 0; | |
1697 | ||
1698 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1699 | ||
2f5265e6 | 1700 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
47846c9b JB |
1701 | |
1702 | ieee80211_debugfs_rename_netdev(sdata); | |
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | static struct notifier_block mac80211_netdev_notifier = { | |
1707 | .notifier_call = netdev_notify, | |
1708 | }; | |
1709 | ||
1710 | int ieee80211_iface_init(void) | |
1711 | { | |
1712 | return register_netdevice_notifier(&mac80211_netdev_notifier); | |
1713 | } | |
1714 | ||
1715 | void ieee80211_iface_exit(void) | |
1716 | { | |
1717 | unregister_netdevice_notifier(&mac80211_netdev_notifier); | |
1718 | } |