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1 | /* | |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <net/mac80211.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/etherdevice.h> | |
19 | #include <linux/if_arp.h> | |
20 | #include <linux/rtnetlink.h> | |
21 | #include <linux/bitmap.h> | |
22 | #include <linux/pm_qos_params.h> | |
23 | #include <linux/inetdevice.h> | |
24 | #include <net/net_namespace.h> | |
25 | #include <net/cfg80211.h> | |
26 | ||
27 | #include "ieee80211_i.h" | |
28 | #include "driver-ops.h" | |
29 | #include "rate.h" | |
30 | #include "mesh.h" | |
31 | #include "wep.h" | |
32 | #include "led.h" | |
33 | #include "cfg.h" | |
34 | #include "debugfs.h" | |
35 | ||
36 | static struct lock_class_key ieee80211_rx_skb_queue_class; | |
37 | ||
38 | void ieee80211_configure_filter(struct ieee80211_local *local) | |
39 | { | |
40 | u64 mc; | |
41 | unsigned int changed_flags; | |
42 | unsigned int new_flags = 0; | |
43 | ||
44 | if (atomic_read(&local->iff_promiscs)) | |
45 | new_flags |= FIF_PROMISC_IN_BSS; | |
46 | ||
47 | if (atomic_read(&local->iff_allmultis)) | |
48 | new_flags |= FIF_ALLMULTI; | |
49 | ||
50 | if (local->monitors || local->scanning) | |
51 | new_flags |= FIF_BCN_PRBRESP_PROMISC; | |
52 | ||
53 | if (local->fif_probe_req || local->probe_req_reg) | |
54 | new_flags |= FIF_PROBE_REQ; | |
55 | ||
56 | if (local->fif_fcsfail) | |
57 | new_flags |= FIF_FCSFAIL; | |
58 | ||
59 | if (local->fif_plcpfail) | |
60 | new_flags |= FIF_PLCPFAIL; | |
61 | ||
62 | if (local->fif_control) | |
63 | new_flags |= FIF_CONTROL; | |
64 | ||
65 | if (local->fif_other_bss) | |
66 | new_flags |= FIF_OTHER_BSS; | |
67 | ||
68 | if (local->fif_pspoll) | |
69 | new_flags |= FIF_PSPOLL; | |
70 | ||
71 | spin_lock_bh(&local->filter_lock); | |
72 | changed_flags = local->filter_flags ^ new_flags; | |
73 | ||
74 | mc = drv_prepare_multicast(local, &local->mc_list); | |
75 | spin_unlock_bh(&local->filter_lock); | |
76 | ||
77 | /* be a bit nasty */ | |
78 | new_flags |= (1<<31); | |
79 | ||
80 | drv_configure_filter(local, changed_flags, &new_flags, mc); | |
81 | ||
82 | WARN_ON(new_flags & (1<<31)); | |
83 | ||
84 | local->filter_flags = new_flags & ~(1<<31); | |
85 | } | |
86 | ||
87 | static void ieee80211_reconfig_filter(struct work_struct *work) | |
88 | { | |
89 | struct ieee80211_local *local = | |
90 | container_of(work, struct ieee80211_local, reconfig_filter); | |
91 | ||
92 | ieee80211_configure_filter(local); | |
93 | } | |
94 | ||
95 | /* | |
96 | * Returns true if we are logically configured to be on | |
97 | * the operating channel AND the hardware-conf is currently | |
98 | * configured on the operating channel. Compares channel-type | |
99 | * as well. | |
100 | */ | |
101 | bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local) | |
102 | { | |
103 | struct ieee80211_channel *chan, *scan_chan; | |
104 | enum nl80211_channel_type channel_type; | |
105 | ||
106 | /* This logic needs to match logic in ieee80211_hw_config */ | |
107 | if (local->scan_channel) { | |
108 | chan = local->scan_channel; | |
109 | /* If scanning on oper channel, use whatever channel-type | |
110 | * is currently in use. | |
111 | */ | |
112 | if (chan == local->oper_channel) | |
113 | channel_type = local->_oper_channel_type; | |
114 | else | |
115 | channel_type = NL80211_CHAN_NO_HT; | |
116 | } else if (local->tmp_channel) { | |
117 | chan = scan_chan = local->tmp_channel; | |
118 | channel_type = local->tmp_channel_type; | |
119 | } else { | |
120 | chan = local->oper_channel; | |
121 | channel_type = local->_oper_channel_type; | |
122 | } | |
123 | ||
124 | if (chan != local->oper_channel || | |
125 | channel_type != local->_oper_channel_type) | |
126 | return false; | |
127 | ||
128 | /* Check current hardware-config against oper_channel. */ | |
129 | if ((local->oper_channel != local->hw.conf.channel) || | |
130 | (local->_oper_channel_type != local->hw.conf.channel_type)) | |
131 | return false; | |
132 | ||
133 | return true; | |
134 | } | |
135 | ||
136 | int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) | |
137 | { | |
138 | struct ieee80211_channel *chan, *scan_chan; | |
139 | int ret = 0; | |
140 | int power; | |
141 | enum nl80211_channel_type channel_type; | |
142 | u32 offchannel_flag; | |
143 | ||
144 | might_sleep(); | |
145 | ||
146 | scan_chan = local->scan_channel; | |
147 | ||
148 | /* If this off-channel logic ever changes, ieee80211_on_oper_channel | |
149 | * may need to change as well. | |
150 | */ | |
151 | offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; | |
152 | if (scan_chan) { | |
153 | chan = scan_chan; | |
154 | /* If scanning on oper channel, use whatever channel-type | |
155 | * is currently in use. | |
156 | */ | |
157 | if (chan == local->oper_channel) | |
158 | channel_type = local->_oper_channel_type; | |
159 | else | |
160 | channel_type = NL80211_CHAN_NO_HT; | |
161 | } else if (local->tmp_channel) { | |
162 | chan = scan_chan = local->tmp_channel; | |
163 | channel_type = local->tmp_channel_type; | |
164 | } else { | |
165 | chan = local->oper_channel; | |
166 | channel_type = local->_oper_channel_type; | |
167 | } | |
168 | ||
169 | if (chan != local->oper_channel || | |
170 | channel_type != local->_oper_channel_type) | |
171 | local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; | |
172 | else | |
173 | local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; | |
174 | ||
175 | offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; | |
176 | ||
177 | if (offchannel_flag || chan != local->hw.conf.channel || | |
178 | channel_type != local->hw.conf.channel_type) { | |
179 | local->hw.conf.channel = chan; | |
180 | local->hw.conf.channel_type = channel_type; | |
181 | changed |= IEEE80211_CONF_CHANGE_CHANNEL; | |
182 | } | |
183 | ||
184 | if (!conf_is_ht(&local->hw.conf)) { | |
185 | /* | |
186 | * mac80211.h documents that this is only valid | |
187 | * when the channel is set to an HT type, and | |
188 | * that otherwise STATIC is used. | |
189 | */ | |
190 | local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; | |
191 | } else if (local->hw.conf.smps_mode != local->smps_mode) { | |
192 | local->hw.conf.smps_mode = local->smps_mode; | |
193 | changed |= IEEE80211_CONF_CHANGE_SMPS; | |
194 | } | |
195 | ||
196 | if ((local->scanning & SCAN_SW_SCANNING) || | |
197 | (local->scanning & SCAN_HW_SCANNING)) | |
198 | power = chan->max_power; | |
199 | else | |
200 | power = local->power_constr_level ? | |
201 | (chan->max_power - local->power_constr_level) : | |
202 | chan->max_power; | |
203 | ||
204 | if (local->user_power_level >= 0) | |
205 | power = min(power, local->user_power_level); | |
206 | ||
207 | if (local->hw.conf.power_level != power) { | |
208 | changed |= IEEE80211_CONF_CHANGE_POWER; | |
209 | local->hw.conf.power_level = power; | |
210 | } | |
211 | ||
212 | if (changed && local->open_count) { | |
213 | ret = drv_config(local, changed); | |
214 | /* | |
215 | * Goal: | |
216 | * HW reconfiguration should never fail, the driver has told | |
217 | * us what it can support so it should live up to that promise. | |
218 | * | |
219 | * Current status: | |
220 | * rfkill is not integrated with mac80211 and a | |
221 | * configuration command can thus fail if hardware rfkill | |
222 | * is enabled | |
223 | * | |
224 | * FIXME: integrate rfkill with mac80211 and then add this | |
225 | * WARN_ON() back | |
226 | * | |
227 | */ | |
228 | /* WARN_ON(ret); */ | |
229 | } | |
230 | ||
231 | return ret; | |
232 | } | |
233 | ||
234 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
235 | u32 changed) | |
236 | { | |
237 | struct ieee80211_local *local = sdata->local; | |
238 | static const u8 zero[ETH_ALEN] = { 0 }; | |
239 | ||
240 | if (!changed) | |
241 | return; | |
242 | ||
243 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { | |
244 | /* | |
245 | * While not associated, claim a BSSID of all-zeroes | |
246 | * so that drivers don't do any weird things with the | |
247 | * BSSID at that time. | |
248 | */ | |
249 | if (sdata->vif.bss_conf.assoc) | |
250 | sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; | |
251 | else | |
252 | sdata->vif.bss_conf.bssid = zero; | |
253 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
254 | sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; | |
255 | else if (sdata->vif.type == NL80211_IFTYPE_AP) | |
256 | sdata->vif.bss_conf.bssid = sdata->vif.addr; | |
257 | else if (sdata->vif.type == NL80211_IFTYPE_WDS) | |
258 | sdata->vif.bss_conf.bssid = NULL; | |
259 | else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
260 | sdata->vif.bss_conf.bssid = zero; | |
261 | } else { | |
262 | WARN_ON(1); | |
263 | return; | |
264 | } | |
265 | ||
266 | switch (sdata->vif.type) { | |
267 | case NL80211_IFTYPE_AP: | |
268 | case NL80211_IFTYPE_ADHOC: | |
269 | case NL80211_IFTYPE_WDS: | |
270 | case NL80211_IFTYPE_MESH_POINT: | |
271 | break; | |
272 | default: | |
273 | /* do not warn to simplify caller in scan.c */ | |
274 | changed &= ~BSS_CHANGED_BEACON_ENABLED; | |
275 | if (WARN_ON(changed & BSS_CHANGED_BEACON)) | |
276 | return; | |
277 | break; | |
278 | } | |
279 | ||
280 | if (changed & BSS_CHANGED_BEACON_ENABLED) { | |
281 | if (local->quiescing || !ieee80211_sdata_running(sdata) || | |
282 | test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) { | |
283 | sdata->vif.bss_conf.enable_beacon = false; | |
284 | } else { | |
285 | /* | |
286 | * Beacon should be enabled, but AP mode must | |
287 | * check whether there is a beacon configured. | |
288 | */ | |
289 | switch (sdata->vif.type) { | |
290 | case NL80211_IFTYPE_AP: | |
291 | sdata->vif.bss_conf.enable_beacon = | |
292 | !!sdata->u.ap.beacon; | |
293 | break; | |
294 | case NL80211_IFTYPE_ADHOC: | |
295 | sdata->vif.bss_conf.enable_beacon = | |
296 | !!sdata->u.ibss.presp; | |
297 | break; | |
298 | #ifdef CONFIG_MAC80211_MESH | |
299 | case NL80211_IFTYPE_MESH_POINT: | |
300 | sdata->vif.bss_conf.enable_beacon = | |
301 | !!sdata->u.mesh.mesh_id_len; | |
302 | break; | |
303 | #endif | |
304 | default: | |
305 | /* not reached */ | |
306 | WARN_ON(1); | |
307 | break; | |
308 | } | |
309 | } | |
310 | } | |
311 | ||
312 | drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); | |
313 | } | |
314 | ||
315 | u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) | |
316 | { | |
317 | sdata->vif.bss_conf.use_cts_prot = false; | |
318 | sdata->vif.bss_conf.use_short_preamble = false; | |
319 | sdata->vif.bss_conf.use_short_slot = false; | |
320 | return BSS_CHANGED_ERP_CTS_PROT | | |
321 | BSS_CHANGED_ERP_PREAMBLE | | |
322 | BSS_CHANGED_ERP_SLOT; | |
323 | } | |
324 | ||
325 | static void ieee80211_tasklet_handler(unsigned long data) | |
326 | { | |
327 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
328 | struct sta_info *sta, *tmp; | |
329 | struct skb_eosp_msg_data *eosp_data; | |
330 | struct sk_buff *skb; | |
331 | ||
332 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
333 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
334 | switch (skb->pkt_type) { | |
335 | case IEEE80211_RX_MSG: | |
336 | /* Clear skb->pkt_type in order to not confuse kernel | |
337 | * netstack. */ | |
338 | skb->pkt_type = 0; | |
339 | ieee80211_rx(local_to_hw(local), skb); | |
340 | break; | |
341 | case IEEE80211_TX_STATUS_MSG: | |
342 | skb->pkt_type = 0; | |
343 | ieee80211_tx_status(local_to_hw(local), skb); | |
344 | break; | |
345 | case IEEE80211_EOSP_MSG: | |
346 | eosp_data = (void *)skb->cb; | |
347 | for_each_sta_info(local, eosp_data->sta, sta, tmp) { | |
348 | /* skip wrong virtual interface */ | |
349 | if (memcmp(eosp_data->iface, | |
350 | sta->sdata->vif.addr, ETH_ALEN)) | |
351 | continue; | |
352 | clear_sta_flag(sta, WLAN_STA_SP); | |
353 | break; | |
354 | } | |
355 | dev_kfree_skb(skb); | |
356 | break; | |
357 | default: | |
358 | WARN(1, "mac80211: Packet is of unknown type %d\n", | |
359 | skb->pkt_type); | |
360 | dev_kfree_skb(skb); | |
361 | break; | |
362 | } | |
363 | } | |
364 | } | |
365 | ||
366 | static void ieee80211_restart_work(struct work_struct *work) | |
367 | { | |
368 | struct ieee80211_local *local = | |
369 | container_of(work, struct ieee80211_local, restart_work); | |
370 | ||
371 | /* wait for scan work complete */ | |
372 | flush_workqueue(local->workqueue); | |
373 | ||
374 | mutex_lock(&local->mtx); | |
375 | WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || | |
376 | local->sched_scanning, | |
377 | "%s called with hardware scan in progress\n", __func__); | |
378 | mutex_unlock(&local->mtx); | |
379 | ||
380 | rtnl_lock(); | |
381 | ieee80211_scan_cancel(local); | |
382 | ieee80211_reconfig(local); | |
383 | rtnl_unlock(); | |
384 | } | |
385 | ||
386 | void ieee80211_restart_hw(struct ieee80211_hw *hw) | |
387 | { | |
388 | struct ieee80211_local *local = hw_to_local(hw); | |
389 | ||
390 | trace_api_restart_hw(local); | |
391 | ||
392 | wiphy_info(hw->wiphy, | |
393 | "Hardware restart was requested\n"); | |
394 | ||
395 | /* use this reason, ieee80211_reconfig will unblock it */ | |
396 | ieee80211_stop_queues_by_reason(hw, | |
397 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
398 | ||
399 | schedule_work(&local->restart_work); | |
400 | } | |
401 | EXPORT_SYMBOL(ieee80211_restart_hw); | |
402 | ||
403 | static void ieee80211_recalc_smps_work(struct work_struct *work) | |
404 | { | |
405 | struct ieee80211_local *local = | |
406 | container_of(work, struct ieee80211_local, recalc_smps); | |
407 | ||
408 | mutex_lock(&local->iflist_mtx); | |
409 | ieee80211_recalc_smps(local); | |
410 | mutex_unlock(&local->iflist_mtx); | |
411 | } | |
412 | ||
413 | #ifdef CONFIG_INET | |
414 | static int ieee80211_ifa_changed(struct notifier_block *nb, | |
415 | unsigned long data, void *arg) | |
416 | { | |
417 | struct in_ifaddr *ifa = arg; | |
418 | struct ieee80211_local *local = | |
419 | container_of(nb, struct ieee80211_local, | |
420 | ifa_notifier); | |
421 | struct net_device *ndev = ifa->ifa_dev->dev; | |
422 | struct wireless_dev *wdev = ndev->ieee80211_ptr; | |
423 | struct in_device *idev; | |
424 | struct ieee80211_sub_if_data *sdata; | |
425 | struct ieee80211_bss_conf *bss_conf; | |
426 | struct ieee80211_if_managed *ifmgd; | |
427 | int c = 0; | |
428 | ||
429 | /* Make sure it's our interface that got changed */ | |
430 | if (!wdev) | |
431 | return NOTIFY_DONE; | |
432 | ||
433 | if (wdev->wiphy != local->hw.wiphy) | |
434 | return NOTIFY_DONE; | |
435 | ||
436 | sdata = IEEE80211_DEV_TO_SUB_IF(ndev); | |
437 | bss_conf = &sdata->vif.bss_conf; | |
438 | ||
439 | if (!ieee80211_sdata_running(sdata)) | |
440 | return NOTIFY_DONE; | |
441 | ||
442 | /* ARP filtering is only supported in managed mode */ | |
443 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
444 | return NOTIFY_DONE; | |
445 | ||
446 | idev = __in_dev_get_rtnl(sdata->dev); | |
447 | if (!idev) | |
448 | return NOTIFY_DONE; | |
449 | ||
450 | ifmgd = &sdata->u.mgd; | |
451 | mutex_lock(&ifmgd->mtx); | |
452 | ||
453 | /* Copy the addresses to the bss_conf list */ | |
454 | ifa = idev->ifa_list; | |
455 | while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { | |
456 | bss_conf->arp_addr_list[c] = ifa->ifa_address; | |
457 | ifa = ifa->ifa_next; | |
458 | c++; | |
459 | } | |
460 | ||
461 | /* If not all addresses fit the list, disable filtering */ | |
462 | if (ifa) { | |
463 | sdata->arp_filter_state = false; | |
464 | c = 0; | |
465 | } else { | |
466 | sdata->arp_filter_state = true; | |
467 | } | |
468 | bss_conf->arp_addr_cnt = c; | |
469 | ||
470 | /* Configure driver only if associated */ | |
471 | if (ifmgd->associated) { | |
472 | bss_conf->arp_filter_enabled = sdata->arp_filter_state; | |
473 | ieee80211_bss_info_change_notify(sdata, | |
474 | BSS_CHANGED_ARP_FILTER); | |
475 | } | |
476 | ||
477 | mutex_unlock(&ifmgd->mtx); | |
478 | ||
479 | return NOTIFY_DONE; | |
480 | } | |
481 | #endif | |
482 | ||
483 | static int ieee80211_napi_poll(struct napi_struct *napi, int budget) | |
484 | { | |
485 | struct ieee80211_local *local = | |
486 | container_of(napi, struct ieee80211_local, napi); | |
487 | ||
488 | return local->ops->napi_poll(&local->hw, budget); | |
489 | } | |
490 | ||
491 | void ieee80211_napi_schedule(struct ieee80211_hw *hw) | |
492 | { | |
493 | struct ieee80211_local *local = hw_to_local(hw); | |
494 | ||
495 | napi_schedule(&local->napi); | |
496 | } | |
497 | EXPORT_SYMBOL(ieee80211_napi_schedule); | |
498 | ||
499 | void ieee80211_napi_complete(struct ieee80211_hw *hw) | |
500 | { | |
501 | struct ieee80211_local *local = hw_to_local(hw); | |
502 | ||
503 | napi_complete(&local->napi); | |
504 | } | |
505 | EXPORT_SYMBOL(ieee80211_napi_complete); | |
506 | ||
507 | /* There isn't a lot of sense in it, but you can transmit anything you like */ | |
508 | static const struct ieee80211_txrx_stypes | |
509 | ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { | |
510 | [NL80211_IFTYPE_ADHOC] = { | |
511 | .tx = 0xffff, | |
512 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4), | |
513 | }, | |
514 | [NL80211_IFTYPE_STATION] = { | |
515 | .tx = 0xffff, | |
516 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | | |
517 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4), | |
518 | }, | |
519 | [NL80211_IFTYPE_AP] = { | |
520 | .tx = 0xffff, | |
521 | .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | | |
522 | BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | | |
523 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | | |
524 | BIT(IEEE80211_STYPE_DISASSOC >> 4) | | |
525 | BIT(IEEE80211_STYPE_AUTH >> 4) | | |
526 | BIT(IEEE80211_STYPE_DEAUTH >> 4) | | |
527 | BIT(IEEE80211_STYPE_ACTION >> 4), | |
528 | }, | |
529 | [NL80211_IFTYPE_AP_VLAN] = { | |
530 | /* copy AP */ | |
531 | .tx = 0xffff, | |
532 | .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | | |
533 | BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | | |
534 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | | |
535 | BIT(IEEE80211_STYPE_DISASSOC >> 4) | | |
536 | BIT(IEEE80211_STYPE_AUTH >> 4) | | |
537 | BIT(IEEE80211_STYPE_DEAUTH >> 4) | | |
538 | BIT(IEEE80211_STYPE_ACTION >> 4), | |
539 | }, | |
540 | [NL80211_IFTYPE_P2P_CLIENT] = { | |
541 | .tx = 0xffff, | |
542 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | | |
543 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4), | |
544 | }, | |
545 | [NL80211_IFTYPE_P2P_GO] = { | |
546 | .tx = 0xffff, | |
547 | .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | | |
548 | BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | | |
549 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | | |
550 | BIT(IEEE80211_STYPE_DISASSOC >> 4) | | |
551 | BIT(IEEE80211_STYPE_AUTH >> 4) | | |
552 | BIT(IEEE80211_STYPE_DEAUTH >> 4) | | |
553 | BIT(IEEE80211_STYPE_ACTION >> 4), | |
554 | }, | |
555 | [NL80211_IFTYPE_MESH_POINT] = { | |
556 | .tx = 0xffff, | |
557 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | | |
558 | BIT(IEEE80211_STYPE_AUTH >> 4) | | |
559 | BIT(IEEE80211_STYPE_DEAUTH >> 4), | |
560 | }, | |
561 | }; | |
562 | ||
563 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, | |
564 | const struct ieee80211_ops *ops) | |
565 | { | |
566 | struct ieee80211_local *local; | |
567 | int priv_size, i; | |
568 | struct wiphy *wiphy; | |
569 | ||
570 | /* Ensure 32-byte alignment of our private data and hw private data. | |
571 | * We use the wiphy priv data for both our ieee80211_local and for | |
572 | * the driver's private data | |
573 | * | |
574 | * In memory it'll be like this: | |
575 | * | |
576 | * +-------------------------+ | |
577 | * | struct wiphy | | |
578 | * +-------------------------+ | |
579 | * | struct ieee80211_local | | |
580 | * +-------------------------+ | |
581 | * | driver's private data | | |
582 | * +-------------------------+ | |
583 | * | |
584 | */ | |
585 | priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; | |
586 | ||
587 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
588 | ||
589 | if (!wiphy) | |
590 | return NULL; | |
591 | ||
592 | wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; | |
593 | ||
594 | wiphy->privid = mac80211_wiphy_privid; | |
595 | ||
596 | wiphy->flags |= WIPHY_FLAG_NETNS_OK | | |
597 | WIPHY_FLAG_4ADDR_AP | | |
598 | WIPHY_FLAG_4ADDR_STATION; | |
599 | ||
600 | if (!ops->set_key) | |
601 | wiphy->flags |= WIPHY_FLAG_IBSS_RSN; | |
602 | ||
603 | wiphy->bss_priv_size = sizeof(struct ieee80211_bss); | |
604 | ||
605 | local = wiphy_priv(wiphy); | |
606 | ||
607 | local->hw.wiphy = wiphy; | |
608 | ||
609 | local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); | |
610 | ||
611 | BUG_ON(!ops->tx); | |
612 | BUG_ON(!ops->start); | |
613 | BUG_ON(!ops->stop); | |
614 | BUG_ON(!ops->config); | |
615 | BUG_ON(!ops->add_interface); | |
616 | BUG_ON(!ops->remove_interface); | |
617 | BUG_ON(!ops->configure_filter); | |
618 | local->ops = ops; | |
619 | ||
620 | /* set up some defaults */ | |
621 | local->hw.queues = 1; | |
622 | local->hw.max_rates = 1; | |
623 | local->hw.max_report_rates = 0; | |
624 | local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; | |
625 | local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; | |
626 | local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; | |
627 | local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; | |
628 | local->user_power_level = -1; | |
629 | local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; | |
630 | local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; | |
631 | ||
632 | INIT_LIST_HEAD(&local->interfaces); | |
633 | ||
634 | __hw_addr_init(&local->mc_list); | |
635 | ||
636 | mutex_init(&local->iflist_mtx); | |
637 | mutex_init(&local->mtx); | |
638 | ||
639 | mutex_init(&local->key_mtx); | |
640 | spin_lock_init(&local->filter_lock); | |
641 | spin_lock_init(&local->queue_stop_reason_lock); | |
642 | ||
643 | /* | |
644 | * The rx_skb_queue is only accessed from tasklets, | |
645 | * but other SKB queues are used from within IRQ | |
646 | * context. Therefore, this one needs a different | |
647 | * locking class so our direct, non-irq-safe use of | |
648 | * the queue's lock doesn't throw lockdep warnings. | |
649 | */ | |
650 | skb_queue_head_init_class(&local->rx_skb_queue, | |
651 | &ieee80211_rx_skb_queue_class); | |
652 | ||
653 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); | |
654 | ||
655 | ieee80211_work_init(local); | |
656 | ||
657 | INIT_WORK(&local->restart_work, ieee80211_restart_work); | |
658 | ||
659 | INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); | |
660 | INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); | |
661 | local->smps_mode = IEEE80211_SMPS_OFF; | |
662 | ||
663 | INIT_WORK(&local->dynamic_ps_enable_work, | |
664 | ieee80211_dynamic_ps_enable_work); | |
665 | INIT_WORK(&local->dynamic_ps_disable_work, | |
666 | ieee80211_dynamic_ps_disable_work); | |
667 | setup_timer(&local->dynamic_ps_timer, | |
668 | ieee80211_dynamic_ps_timer, (unsigned long) local); | |
669 | ||
670 | INIT_WORK(&local->sched_scan_stopped_work, | |
671 | ieee80211_sched_scan_stopped_work); | |
672 | ||
673 | sta_info_init(local); | |
674 | ||
675 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
676 | skb_queue_head_init(&local->pending[i]); | |
677 | atomic_set(&local->agg_queue_stop[i], 0); | |
678 | } | |
679 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, | |
680 | (unsigned long)local); | |
681 | ||
682 | tasklet_init(&local->tasklet, | |
683 | ieee80211_tasklet_handler, | |
684 | (unsigned long) local); | |
685 | ||
686 | skb_queue_head_init(&local->skb_queue); | |
687 | skb_queue_head_init(&local->skb_queue_unreliable); | |
688 | ||
689 | /* init dummy netdev for use w/ NAPI */ | |
690 | init_dummy_netdev(&local->napi_dev); | |
691 | ||
692 | ieee80211_led_names(local); | |
693 | ||
694 | ieee80211_hw_roc_setup(local); | |
695 | ||
696 | return local_to_hw(local); | |
697 | } | |
698 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
699 | ||
700 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
701 | { | |
702 | struct ieee80211_local *local = hw_to_local(hw); | |
703 | int result, i; | |
704 | enum ieee80211_band band; | |
705 | int channels, max_bitrates; | |
706 | bool supp_ht; | |
707 | static const u32 cipher_suites[] = { | |
708 | /* keep WEP first, it may be removed below */ | |
709 | WLAN_CIPHER_SUITE_WEP40, | |
710 | WLAN_CIPHER_SUITE_WEP104, | |
711 | WLAN_CIPHER_SUITE_TKIP, | |
712 | WLAN_CIPHER_SUITE_CCMP, | |
713 | ||
714 | /* keep last -- depends on hw flags! */ | |
715 | WLAN_CIPHER_SUITE_AES_CMAC | |
716 | }; | |
717 | ||
718 | if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) | |
719 | #ifdef CONFIG_PM | |
720 | && (!local->ops->suspend || !local->ops->resume) | |
721 | #endif | |
722 | ) | |
723 | return -EINVAL; | |
724 | ||
725 | if (hw->max_report_rates == 0) | |
726 | hw->max_report_rates = hw->max_rates; | |
727 | ||
728 | /* | |
729 | * generic code guarantees at least one band, | |
730 | * set this very early because much code assumes | |
731 | * that hw.conf.channel is assigned | |
732 | */ | |
733 | channels = 0; | |
734 | max_bitrates = 0; | |
735 | supp_ht = false; | |
736 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
737 | struct ieee80211_supported_band *sband; | |
738 | ||
739 | sband = local->hw.wiphy->bands[band]; | |
740 | if (!sband) | |
741 | continue; | |
742 | if (!local->oper_channel) { | |
743 | /* init channel we're on */ | |
744 | local->hw.conf.channel = | |
745 | local->oper_channel = &sband->channels[0]; | |
746 | local->hw.conf.channel_type = NL80211_CHAN_NO_HT; | |
747 | } | |
748 | channels += sband->n_channels; | |
749 | ||
750 | if (max_bitrates < sband->n_bitrates) | |
751 | max_bitrates = sband->n_bitrates; | |
752 | supp_ht = supp_ht || sband->ht_cap.ht_supported; | |
753 | } | |
754 | ||
755 | local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + | |
756 | sizeof(void *) * channels, GFP_KERNEL); | |
757 | if (!local->int_scan_req) | |
758 | return -ENOMEM; | |
759 | ||
760 | /* if low-level driver supports AP, we also support VLAN */ | |
761 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { | |
762 | hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
763 | hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
764 | } | |
765 | ||
766 | /* mac80211 always supports monitor */ | |
767 | hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); | |
768 | hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); | |
769 | ||
770 | /* | |
771 | * mac80211 doesn't support more than 1 channel, and also not more | |
772 | * than one IBSS interface | |
773 | */ | |
774 | for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { | |
775 | const struct ieee80211_iface_combination *c; | |
776 | int j; | |
777 | ||
778 | c = &hw->wiphy->iface_combinations[i]; | |
779 | ||
780 | if (c->num_different_channels > 1) | |
781 | return -EINVAL; | |
782 | ||
783 | for (j = 0; j < c->n_limits; j++) | |
784 | if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && | |
785 | c->limits[j].max > 1) | |
786 | return -EINVAL; | |
787 | } | |
788 | ||
789 | #ifndef CONFIG_MAC80211_MESH | |
790 | /* mesh depends on Kconfig, but drivers should set it if they want */ | |
791 | local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); | |
792 | #endif | |
793 | ||
794 | /* if the underlying driver supports mesh, mac80211 will (at least) | |
795 | * provide routing of mesh authentication frames to userspace */ | |
796 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) | |
797 | local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; | |
798 | ||
799 | /* mac80211 supports control port protocol changing */ | |
800 | local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; | |
801 | ||
802 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
803 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; | |
804 | else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) | |
805 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; | |
806 | ||
807 | WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) | |
808 | && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), | |
809 | "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); | |
810 | ||
811 | /* | |
812 | * Calculate scan IE length -- we need this to alloc | |
813 | * memory and to subtract from the driver limit. It | |
814 | * includes the DS Params, (extended) supported rates, and HT | |
815 | * information -- SSID is the driver's responsibility. | |
816 | */ | |
817 | local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + | |
818 | 3 /* DS Params */; | |
819 | if (supp_ht) | |
820 | local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); | |
821 | ||
822 | if (!local->ops->hw_scan) { | |
823 | /* For hw_scan, driver needs to set these up. */ | |
824 | local->hw.wiphy->max_scan_ssids = 4; | |
825 | local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; | |
826 | } | |
827 | ||
828 | /* | |
829 | * If the driver supports any scan IEs, then assume the | |
830 | * limit includes the IEs mac80211 will add, otherwise | |
831 | * leave it at zero and let the driver sort it out; we | |
832 | * still pass our IEs to the driver but userspace will | |
833 | * not be allowed to in that case. | |
834 | */ | |
835 | if (local->hw.wiphy->max_scan_ie_len) | |
836 | local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; | |
837 | ||
838 | /* Set up cipher suites unless driver already did */ | |
839 | if (!local->hw.wiphy->cipher_suites) { | |
840 | local->hw.wiphy->cipher_suites = cipher_suites; | |
841 | local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); | |
842 | if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) | |
843 | local->hw.wiphy->n_cipher_suites--; | |
844 | } | |
845 | if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { | |
846 | if (local->hw.wiphy->cipher_suites == cipher_suites) { | |
847 | local->hw.wiphy->cipher_suites += 2; | |
848 | local->hw.wiphy->n_cipher_suites -= 2; | |
849 | } else { | |
850 | u32 *suites; | |
851 | int r, w = 0; | |
852 | ||
853 | /* Filter out WEP */ | |
854 | ||
855 | suites = kmemdup( | |
856 | local->hw.wiphy->cipher_suites, | |
857 | sizeof(u32) * local->hw.wiphy->n_cipher_suites, | |
858 | GFP_KERNEL); | |
859 | if (!suites) | |
860 | return -ENOMEM; | |
861 | for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { | |
862 | u32 suite = local->hw.wiphy->cipher_suites[r]; | |
863 | if (suite == WLAN_CIPHER_SUITE_WEP40 || | |
864 | suite == WLAN_CIPHER_SUITE_WEP104) | |
865 | continue; | |
866 | suites[w++] = suite; | |
867 | } | |
868 | local->hw.wiphy->cipher_suites = suites; | |
869 | local->hw.wiphy->n_cipher_suites = w; | |
870 | local->wiphy_ciphers_allocated = true; | |
871 | } | |
872 | } | |
873 | ||
874 | if (!local->ops->remain_on_channel) | |
875 | local->hw.wiphy->max_remain_on_channel_duration = 5000; | |
876 | ||
877 | if (local->ops->sched_scan_start) | |
878 | local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; | |
879 | ||
880 | /* mac80211 based drivers don't support internal TDLS setup */ | |
881 | if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) | |
882 | local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; | |
883 | ||
884 | result = wiphy_register(local->hw.wiphy); | |
885 | if (result < 0) | |
886 | goto fail_wiphy_register; | |
887 | ||
888 | /* | |
889 | * We use the number of queues for feature tests (QoS, HT) internally | |
890 | * so restrict them appropriately. | |
891 | */ | |
892 | if (hw->queues > IEEE80211_MAX_QUEUES) | |
893 | hw->queues = IEEE80211_MAX_QUEUES; | |
894 | ||
895 | local->workqueue = | |
896 | alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0); | |
897 | if (!local->workqueue) { | |
898 | result = -ENOMEM; | |
899 | goto fail_workqueue; | |
900 | } | |
901 | ||
902 | /* | |
903 | * The hardware needs headroom for sending the frame, | |
904 | * and we need some headroom for passing the frame to monitor | |
905 | * interfaces, but never both at the same time. | |
906 | */ | |
907 | #ifndef __CHECKER__ | |
908 | BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != | |
909 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
910 | #endif | |
911 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, | |
912 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
913 | ||
914 | debugfs_hw_add(local); | |
915 | ||
916 | /* | |
917 | * if the driver doesn't specify a max listen interval we | |
918 | * use 5 which should be a safe default | |
919 | */ | |
920 | if (local->hw.max_listen_interval == 0) | |
921 | local->hw.max_listen_interval = 5; | |
922 | ||
923 | local->hw.conf.listen_interval = local->hw.max_listen_interval; | |
924 | ||
925 | local->dynamic_ps_forced_timeout = -1; | |
926 | ||
927 | result = ieee80211_wep_init(local); | |
928 | if (result < 0) | |
929 | wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", | |
930 | result); | |
931 | ||
932 | rtnl_lock(); | |
933 | ||
934 | result = ieee80211_init_rate_ctrl_alg(local, | |
935 | hw->rate_control_algorithm); | |
936 | if (result < 0) { | |
937 | wiphy_debug(local->hw.wiphy, | |
938 | "Failed to initialize rate control algorithm\n"); | |
939 | goto fail_rate; | |
940 | } | |
941 | ||
942 | /* add one default STA interface if supported */ | |
943 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { | |
944 | result = ieee80211_if_add(local, "wlan%d", NULL, | |
945 | NL80211_IFTYPE_STATION, NULL); | |
946 | if (result) | |
947 | wiphy_warn(local->hw.wiphy, | |
948 | "Failed to add default virtual iface\n"); | |
949 | } | |
950 | ||
951 | rtnl_unlock(); | |
952 | ||
953 | ieee80211_led_init(local); | |
954 | ||
955 | local->network_latency_notifier.notifier_call = | |
956 | ieee80211_max_network_latency; | |
957 | result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, | |
958 | &local->network_latency_notifier); | |
959 | if (result) { | |
960 | rtnl_lock(); | |
961 | goto fail_pm_qos; | |
962 | } | |
963 | ||
964 | #ifdef CONFIG_INET | |
965 | local->ifa_notifier.notifier_call = ieee80211_ifa_changed; | |
966 | result = register_inetaddr_notifier(&local->ifa_notifier); | |
967 | if (result) | |
968 | goto fail_ifa; | |
969 | #endif | |
970 | ||
971 | netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, | |
972 | local->hw.napi_weight); | |
973 | ||
974 | return 0; | |
975 | ||
976 | #ifdef CONFIG_INET | |
977 | fail_ifa: | |
978 | pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, | |
979 | &local->network_latency_notifier); | |
980 | rtnl_lock(); | |
981 | #endif | |
982 | fail_pm_qos: | |
983 | ieee80211_led_exit(local); | |
984 | ieee80211_remove_interfaces(local); | |
985 | fail_rate: | |
986 | rtnl_unlock(); | |
987 | ieee80211_wep_free(local); | |
988 | sta_info_stop(local); | |
989 | destroy_workqueue(local->workqueue); | |
990 | fail_workqueue: | |
991 | wiphy_unregister(local->hw.wiphy); | |
992 | fail_wiphy_register: | |
993 | if (local->wiphy_ciphers_allocated) | |
994 | kfree(local->hw.wiphy->cipher_suites); | |
995 | kfree(local->int_scan_req); | |
996 | return result; | |
997 | } | |
998 | EXPORT_SYMBOL(ieee80211_register_hw); | |
999 | ||
1000 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) | |
1001 | { | |
1002 | struct ieee80211_local *local = hw_to_local(hw); | |
1003 | ||
1004 | tasklet_kill(&local->tx_pending_tasklet); | |
1005 | tasklet_kill(&local->tasklet); | |
1006 | ||
1007 | pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, | |
1008 | &local->network_latency_notifier); | |
1009 | #ifdef CONFIG_INET | |
1010 | unregister_inetaddr_notifier(&local->ifa_notifier); | |
1011 | #endif | |
1012 | ||
1013 | rtnl_lock(); | |
1014 | ||
1015 | /* | |
1016 | * At this point, interface list manipulations are fine | |
1017 | * because the driver cannot be handing us frames any | |
1018 | * more and the tasklet is killed. | |
1019 | */ | |
1020 | ieee80211_remove_interfaces(local); | |
1021 | ||
1022 | rtnl_unlock(); | |
1023 | ||
1024 | /* | |
1025 | * Now all work items will be gone, but the | |
1026 | * timer might still be armed, so delete it | |
1027 | */ | |
1028 | del_timer_sync(&local->work_timer); | |
1029 | ||
1030 | cancel_work_sync(&local->restart_work); | |
1031 | cancel_work_sync(&local->reconfig_filter); | |
1032 | ||
1033 | ieee80211_clear_tx_pending(local); | |
1034 | rate_control_deinitialize(local); | |
1035 | ||
1036 | if (skb_queue_len(&local->skb_queue) || | |
1037 | skb_queue_len(&local->skb_queue_unreliable)) | |
1038 | wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); | |
1039 | skb_queue_purge(&local->skb_queue); | |
1040 | skb_queue_purge(&local->skb_queue_unreliable); | |
1041 | skb_queue_purge(&local->rx_skb_queue); | |
1042 | ||
1043 | destroy_workqueue(local->workqueue); | |
1044 | wiphy_unregister(local->hw.wiphy); | |
1045 | sta_info_stop(local); | |
1046 | ieee80211_wep_free(local); | |
1047 | ieee80211_led_exit(local); | |
1048 | kfree(local->int_scan_req); | |
1049 | } | |
1050 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1051 | ||
1052 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1053 | { | |
1054 | struct ieee80211_local *local = hw_to_local(hw); | |
1055 | ||
1056 | mutex_destroy(&local->iflist_mtx); | |
1057 | mutex_destroy(&local->mtx); | |
1058 | ||
1059 | if (local->wiphy_ciphers_allocated) | |
1060 | kfree(local->hw.wiphy->cipher_suites); | |
1061 | ||
1062 | wiphy_free(local->hw.wiphy); | |
1063 | } | |
1064 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1065 | ||
1066 | static int __init ieee80211_init(void) | |
1067 | { | |
1068 | struct sk_buff *skb; | |
1069 | int ret; | |
1070 | ||
1071 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); | |
1072 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
1073 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); | |
1074 | ||
1075 | ret = rc80211_minstrel_init(); | |
1076 | if (ret) | |
1077 | return ret; | |
1078 | ||
1079 | ret = rc80211_minstrel_ht_init(); | |
1080 | if (ret) | |
1081 | goto err_minstrel; | |
1082 | ||
1083 | ret = rc80211_pid_init(); | |
1084 | if (ret) | |
1085 | goto err_pid; | |
1086 | ||
1087 | ret = ieee80211_iface_init(); | |
1088 | if (ret) | |
1089 | goto err_netdev; | |
1090 | ||
1091 | return 0; | |
1092 | err_netdev: | |
1093 | rc80211_pid_exit(); | |
1094 | err_pid: | |
1095 | rc80211_minstrel_ht_exit(); | |
1096 | err_minstrel: | |
1097 | rc80211_minstrel_exit(); | |
1098 | ||
1099 | return ret; | |
1100 | } | |
1101 | ||
1102 | static void __exit ieee80211_exit(void) | |
1103 | { | |
1104 | rc80211_pid_exit(); | |
1105 | rc80211_minstrel_ht_exit(); | |
1106 | rc80211_minstrel_exit(); | |
1107 | ||
1108 | if (mesh_allocated) | |
1109 | ieee80211s_stop(); | |
1110 | ||
1111 | ieee80211_iface_exit(); | |
1112 | ||
1113 | rcu_barrier(); | |
1114 | } | |
1115 | ||
1116 | ||
1117 | subsys_initcall(ieee80211_init); | |
1118 | module_exit(ieee80211_exit); | |
1119 | ||
1120 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1121 | MODULE_LICENSE("GPL"); |