Commit | Line | Data |
---|---|---|
f0706e82 JB |
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 <net/ieee80211_radiotap.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/if_arp.h> | |
21 | #include <linux/wireless.h> | |
22 | #include <linux/rtnetlink.h> | |
f0706e82 | 23 | #include <linux/bitmap.h> |
881d966b | 24 | #include <net/net_namespace.h> |
f0706e82 JB |
25 | #include <net/cfg80211.h> |
26 | ||
f0706e82 | 27 | #include "ieee80211_i.h" |
2c8dccc7 | 28 | #include "rate.h" |
f7a92144 | 29 | #include "mesh.h" |
f0706e82 | 30 | #include "wep.h" |
f0706e82 JB |
31 | #include "wme.h" |
32 | #include "aes_ccm.h" | |
2c8dccc7 | 33 | #include "led.h" |
e0eb6859 | 34 | #include "cfg.h" |
e9f207f0 JB |
35 | #include "debugfs.h" |
36 | #include "debugfs_netdev.h" | |
f0706e82 | 37 | |
b306f453 JB |
38 | /* |
39 | * For seeing transmitted packets on monitor interfaces | |
40 | * we have a radiotap header too. | |
41 | */ | |
42 | struct ieee80211_tx_status_rtap_hdr { | |
43 | struct ieee80211_radiotap_header hdr; | |
44 | __le16 tx_flags; | |
45 | u8 data_retries; | |
46 | } __attribute__ ((packed)); | |
47 | ||
b2c258fb | 48 | /* common interface routines */ |
b306f453 | 49 | |
b95cce35 | 50 | static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr) |
b2c258fb JB |
51 | { |
52 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
53 | return ETH_ALEN; | |
54 | } | |
f0706e82 | 55 | |
4150c572 JB |
56 | /* must be called under mdev tx lock */ |
57 | static void ieee80211_configure_filter(struct ieee80211_local *local) | |
58 | { | |
59 | unsigned int changed_flags; | |
60 | unsigned int new_flags = 0; | |
61 | ||
53918994 | 62 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
63 | new_flags |= FIF_PROMISC_IN_BSS; |
64 | ||
53918994 | 65 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
66 | new_flags |= FIF_ALLMULTI; |
67 | ||
68 | if (local->monitors) | |
8cc9a739 MW |
69 | new_flags |= FIF_BCN_PRBRESP_PROMISC; |
70 | ||
71 | if (local->fif_fcsfail) | |
72 | new_flags |= FIF_FCSFAIL; | |
73 | ||
74 | if (local->fif_plcpfail) | |
75 | new_flags |= FIF_PLCPFAIL; | |
76 | ||
77 | if (local->fif_control) | |
78 | new_flags |= FIF_CONTROL; | |
79 | ||
80 | if (local->fif_other_bss) | |
81 | new_flags |= FIF_OTHER_BSS; | |
4150c572 JB |
82 | |
83 | changed_flags = local->filter_flags ^ new_flags; | |
84 | ||
85 | /* be a bit nasty */ | |
86 | new_flags |= (1<<31); | |
87 | ||
88 | local->ops->configure_filter(local_to_hw(local), | |
89 | changed_flags, &new_flags, | |
90 | local->mdev->mc_count, | |
91 | local->mdev->mc_list); | |
92 | ||
93 | WARN_ON(new_flags & (1<<31)); | |
94 | ||
95 | local->filter_flags = new_flags & ~(1<<31); | |
96 | } | |
97 | ||
b2c258fb | 98 | /* master interface */ |
f0706e82 | 99 | |
b2c258fb JB |
100 | static int ieee80211_master_open(struct net_device *dev) |
101 | { | |
102 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
103 | struct ieee80211_sub_if_data *sdata; | |
104 | int res = -EOPNOTSUPP; | |
f0706e82 | 105 | |
79010420 JB |
106 | /* we hold the RTNL here so can safely walk the list */ |
107 | list_for_each_entry(sdata, &local->interfaces, list) { | |
b2c258fb JB |
108 | if (sdata->dev != dev && netif_running(sdata->dev)) { |
109 | res = 0; | |
110 | break; | |
111 | } | |
112 | } | |
36d6825b JB |
113 | |
114 | if (res) | |
115 | return res; | |
116 | ||
117 | netif_start_queue(local->mdev); | |
118 | ||
119 | return 0; | |
b2c258fb | 120 | } |
f0706e82 | 121 | |
b2c258fb | 122 | static int ieee80211_master_stop(struct net_device *dev) |
f0706e82 | 123 | { |
b2c258fb JB |
124 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
125 | struct ieee80211_sub_if_data *sdata; | |
f0706e82 | 126 | |
79010420 JB |
127 | /* we hold the RTNL here so can safely walk the list */ |
128 | list_for_each_entry(sdata, &local->interfaces, list) | |
b2c258fb JB |
129 | if (sdata->dev != dev && netif_running(sdata->dev)) |
130 | dev_close(sdata->dev); | |
f0706e82 | 131 | |
b2c258fb JB |
132 | return 0; |
133 | } | |
f0706e82 | 134 | |
4150c572 JB |
135 | static void ieee80211_master_set_multicast_list(struct net_device *dev) |
136 | { | |
137 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
138 | ||
139 | ieee80211_configure_filter(local); | |
140 | } | |
141 | ||
b2c258fb | 142 | /* regular interfaces */ |
f0706e82 | 143 | |
b2c258fb | 144 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
f0706e82 | 145 | { |
f7a92144 LCC |
146 | int meshhdrlen; |
147 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
148 | ||
149 | meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0; | |
150 | ||
b2c258fb JB |
151 | /* FIX: what would be proper limits for MTU? |
152 | * This interface uses 802.3 frames. */ | |
f7a92144 LCC |
153 | if (new_mtu < 256 || |
154 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
b2c258fb JB |
155 | printk(KERN_WARNING "%s: invalid MTU %d\n", |
156 | dev->name, new_mtu); | |
157 | return -EINVAL; | |
158 | } | |
f0706e82 | 159 | |
b2c258fb JB |
160 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
161 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
162 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
163 | dev->mtu = new_mtu; | |
f0706e82 JB |
164 | return 0; |
165 | } | |
166 | ||
b2c258fb JB |
167 | static inline int identical_mac_addr_allowed(int type1, int type2) |
168 | { | |
169 | return (type1 == IEEE80211_IF_TYPE_MNTR || | |
170 | type2 == IEEE80211_IF_TYPE_MNTR || | |
171 | (type1 == IEEE80211_IF_TYPE_AP && | |
172 | type2 == IEEE80211_IF_TYPE_WDS) || | |
173 | (type1 == IEEE80211_IF_TYPE_WDS && | |
174 | (type2 == IEEE80211_IF_TYPE_WDS || | |
175 | type2 == IEEE80211_IF_TYPE_AP)) || | |
176 | (type1 == IEEE80211_IF_TYPE_AP && | |
177 | type2 == IEEE80211_IF_TYPE_VLAN) || | |
178 | (type1 == IEEE80211_IF_TYPE_VLAN && | |
179 | (type2 == IEEE80211_IF_TYPE_AP || | |
180 | type2 == IEEE80211_IF_TYPE_VLAN))); | |
181 | } | |
f0706e82 | 182 | |
b2c258fb | 183 | static int ieee80211_open(struct net_device *dev) |
e2ebc74d | 184 | { |
b2c258fb JB |
185 | struct ieee80211_sub_if_data *sdata, *nsdata; |
186 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
187 | struct ieee80211_if_init_conf conf; | |
188 | int res; | |
ceffefd1 | 189 | bool need_hw_reconfig = 0; |
44213b5e | 190 | struct sta_info *sta; |
f0706e82 | 191 | |
b2c258fb | 192 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0ec3ca44 | 193 | |
79010420 JB |
194 | /* we hold the RTNL here so can safely walk the list */ |
195 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
b2c258fb | 196 | struct net_device *ndev = nsdata->dev; |
e2ebc74d | 197 | |
665e8aaf JB |
198 | if (ndev != dev && ndev != local->mdev && netif_running(ndev)) { |
199 | /* | |
200 | * Allow only a single IBSS interface to be up at any | |
201 | * time. This is restricted because beacon distribution | |
202 | * cannot work properly if both are in the same IBSS. | |
203 | * | |
204 | * To remove this restriction we'd have to disallow them | |
205 | * from setting the same SSID on different IBSS interfaces | |
206 | * belonging to the same hardware. Then, however, we're | |
207 | * faced with having to adopt two different TSF timers... | |
208 | */ | |
209 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && | |
210 | nsdata->vif.type == IEEE80211_IF_TYPE_IBSS) | |
211 | return -EBUSY; | |
212 | ||
213 | /* | |
214 | * Disallow multiple IBSS/STA mode interfaces. | |
215 | * | |
216 | * This is a technical restriction, it is possible although | |
217 | * most likely not IEEE 802.11 compliant to have multiple | |
218 | * STAs with just a single hardware (the TSF timer will not | |
219 | * be adjusted properly.) | |
220 | * | |
221 | * However, because mac80211 uses the master device's BSS | |
222 | * information for each STA/IBSS interface, doing this will | |
223 | * currently corrupt that BSS information completely, unless, | |
224 | * a not very useful case, both STAs are associated to the | |
225 | * same BSS. | |
226 | * | |
227 | * To remove this restriction, the BSS information needs to | |
228 | * be embedded in the STA/IBSS mode sdata instead of using | |
229 | * the master device's BSS structure. | |
230 | */ | |
231 | if ((sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
232 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) && | |
233 | (nsdata->vif.type == IEEE80211_IF_TYPE_STA || | |
234 | nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)) | |
235 | return -EBUSY; | |
236 | ||
237 | /* | |
238 | * The remaining checks are only performed for interfaces | |
239 | * with the same MAC address. | |
240 | */ | |
241 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
242 | continue; | |
243 | ||
0ec3ca44 JB |
244 | /* |
245 | * check whether it may have the same address | |
246 | */ | |
51fb61e7 JB |
247 | if (!identical_mac_addr_allowed(sdata->vif.type, |
248 | nsdata->vif.type)) | |
0ec3ca44 | 249 | return -ENOTUNIQ; |
0ec3ca44 JB |
250 | |
251 | /* | |
252 | * can only add VLANs to enabled APs | |
253 | */ | |
51fb61e7 | 254 | if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN && |
665e8aaf | 255 | nsdata->vif.type == IEEE80211_IF_TYPE_AP) |
0ec3ca44 | 256 | sdata->u.vlan.ap = nsdata; |
b2c258fb JB |
257 | } |
258 | } | |
f0706e82 | 259 | |
51fb61e7 | 260 | switch (sdata->vif.type) { |
0ec3ca44 | 261 | case IEEE80211_IF_TYPE_WDS: |
e94e1068 | 262 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) |
0ec3ca44 JB |
263 | return -ENOLINK; |
264 | break; | |
265 | case IEEE80211_IF_TYPE_VLAN: | |
266 | if (!sdata->u.vlan.ap) | |
267 | return -ENOLINK; | |
268 | break; | |
fb1c1cd6 | 269 | case IEEE80211_IF_TYPE_AP: |
fb1c1cd6 JB |
270 | case IEEE80211_IF_TYPE_STA: |
271 | case IEEE80211_IF_TYPE_MNTR: | |
272 | case IEEE80211_IF_TYPE_IBSS: | |
6032f934 | 273 | case IEEE80211_IF_TYPE_MESH_POINT: |
fb1c1cd6 JB |
274 | /* no special treatment */ |
275 | break; | |
a2897552 JB |
276 | case IEEE80211_IF_TYPE_INVALID: |
277 | /* cannot happen */ | |
278 | WARN_ON(1); | |
279 | break; | |
0ec3ca44 | 280 | } |
f0706e82 | 281 | |
b2c258fb JB |
282 | if (local->open_count == 0) { |
283 | res = 0; | |
4150c572 JB |
284 | if (local->ops->start) |
285 | res = local->ops->start(local_to_hw(local)); | |
286 | if (res) | |
b2c258fb | 287 | return res; |
ceffefd1 | 288 | need_hw_reconfig = 1; |
cdcb006f | 289 | ieee80211_led_radio(local, local->hw.conf.radio_enabled); |
b2c258fb | 290 | } |
f0706e82 | 291 | |
51fb61e7 | 292 | switch (sdata->vif.type) { |
0ec3ca44 JB |
293 | case IEEE80211_IF_TYPE_VLAN: |
294 | list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans); | |
295 | /* no need to tell driver */ | |
296 | break; | |
4150c572 | 297 | case IEEE80211_IF_TYPE_MNTR: |
3d30d949 MW |
298 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
299 | local->cooked_mntrs++; | |
300 | break; | |
301 | } | |
302 | ||
4150c572 | 303 | /* must be before the call to ieee80211_configure_filter */ |
b2c258fb | 304 | local->monitors++; |
8cc9a739 | 305 | if (local->monitors == 1) |
4150c572 | 306 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
8cc9a739 MW |
307 | |
308 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
309 | local->fif_fcsfail++; | |
310 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
311 | local->fif_plcpfail++; | |
312 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
313 | local->fif_control++; | |
314 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
315 | local->fif_other_bss++; | |
316 | ||
317 | netif_tx_lock_bh(local->mdev); | |
318 | ieee80211_configure_filter(local); | |
319 | netif_tx_unlock_bh(local->mdev); | |
4150c572 JB |
320 | break; |
321 | case IEEE80211_IF_TYPE_STA: | |
322 | case IEEE80211_IF_TYPE_IBSS: | |
323 | sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
324 | /* fall through */ | |
325 | default: | |
32bfd35d | 326 | conf.vif = &sdata->vif; |
51fb61e7 | 327 | conf.type = sdata->vif.type; |
4150c572 JB |
328 | conf.mac_addr = dev->dev_addr; |
329 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
4150c572 | 330 | if (res) |
636c5d48 | 331 | goto err_stop; |
4150c572 | 332 | |
b2c258fb | 333 | ieee80211_if_config(dev); |
d9430a32 | 334 | ieee80211_reset_erp_info(dev); |
11a843b7 | 335 | ieee80211_enable_keys(sdata); |
4150c572 | 336 | |
51fb61e7 | 337 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
ddd3d2be | 338 | !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) |
4150c572 JB |
339 | netif_carrier_off(dev); |
340 | else | |
341 | netif_carrier_on(dev); | |
d9430a32 | 342 | } |
f0706e82 | 343 | |
636c5d48 JB |
344 | if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) { |
345 | /* Create STA entry for the WDS peer */ | |
346 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
347 | GFP_KERNEL); | |
348 | if (!sta) { | |
349 | res = -ENOMEM; | |
350 | goto err_del_interface; | |
351 | } | |
352 | ||
07346f81 | 353 | /* no locking required since STA is not live yet */ |
636c5d48 JB |
354 | sta->flags |= WLAN_STA_AUTHORIZED; |
355 | ||
356 | res = sta_info_insert(sta); | |
357 | if (res) { | |
358 | /* STA has been freed */ | |
359 | goto err_del_interface; | |
360 | } | |
361 | } | |
362 | ||
4150c572 JB |
363 | if (local->open_count == 0) { |
364 | res = dev_open(local->mdev); | |
365 | WARN_ON(res); | |
636c5d48 JB |
366 | if (res) |
367 | goto err_del_interface; | |
4150c572 JB |
368 | tasklet_enable(&local->tx_pending_tasklet); |
369 | tasklet_enable(&local->tasklet); | |
370 | } | |
371 | ||
c1428b3f JB |
372 | /* |
373 | * set_multicast_list will be invoked by the networking core | |
374 | * which will check whether any increments here were done in | |
375 | * error and sync them down to the hardware as filter flags. | |
376 | */ | |
377 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
378 | atomic_inc(&local->iff_allmultis); | |
379 | ||
380 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
381 | atomic_inc(&local->iff_promiscs); | |
382 | ||
4150c572 | 383 | local->open_count++; |
ceffefd1 MB |
384 | if (need_hw_reconfig) |
385 | ieee80211_hw_config(local); | |
f0706e82 | 386 | |
64f851e4 JN |
387 | /* |
388 | * ieee80211_sta_work is disabled while network interface | |
389 | * is down. Therefore, some configuration changes may not | |
390 | * yet be effective. Trigger execution of ieee80211_sta_work | |
391 | * to fix this. | |
392 | */ | |
988c0f72 JB |
393 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || |
394 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { | |
64f851e4 JN |
395 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
396 | queue_work(local->hw.workqueue, &ifsta->work); | |
397 | } | |
398 | ||
b2c258fb | 399 | netif_start_queue(dev); |
4150c572 | 400 | |
b2c258fb | 401 | return 0; |
636c5d48 JB |
402 | err_del_interface: |
403 | local->ops->remove_interface(local_to_hw(local), &conf); | |
404 | err_stop: | |
405 | if (!local->open_count && local->ops->stop) | |
406 | local->ops->stop(local_to_hw(local)); | |
407 | return res; | |
f0706e82 | 408 | } |
f0706e82 | 409 | |
4150c572 | 410 | static int ieee80211_stop(struct net_device *dev) |
f0706e82 | 411 | { |
44213b5e JB |
412 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
413 | struct ieee80211_local *local = sdata->local; | |
4150c572 | 414 | struct ieee80211_if_init_conf conf; |
07db2183 | 415 | struct sta_info *sta; |
4150c572 | 416 | |
44213b5e JB |
417 | /* |
418 | * Stop TX on this interface first. | |
419 | */ | |
420 | netif_stop_queue(dev); | |
4150c572 | 421 | |
44213b5e JB |
422 | /* |
423 | * Now delete all active aggregation sessions. | |
424 | */ | |
d0709a65 JB |
425 | rcu_read_lock(); |
426 | ||
427 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
428 | if (sta->sdata == sdata) | |
85249e5f | 429 | ieee80211_sta_tear_down_BA_sessions(dev, sta->addr); |
07db2183 RR |
430 | } |
431 | ||
d0709a65 JB |
432 | rcu_read_unlock(); |
433 | ||
44213b5e JB |
434 | /* |
435 | * Remove all stations associated with this interface. | |
436 | * | |
437 | * This must be done before calling ops->remove_interface() | |
438 | * because otherwise we can later invoke ops->sta_notify() | |
439 | * whenever the STAs are removed, and that invalidates driver | |
440 | * assumptions about always getting a vif pointer that is valid | |
441 | * (because if we remove a STA after ops->remove_interface() | |
442 | * the driver will have removed the vif info already!) | |
443 | * | |
444 | * We could relax this and only unlink the stations from the | |
445 | * hash table and list but keep them on a per-sdata list that | |
446 | * will be inserted back again when the interface is brought | |
447 | * up again, but I don't currently see a use case for that, | |
448 | * except with WDS which gets a STA entry created when it is | |
449 | * brought up. | |
450 | */ | |
451 | sta_info_flush(local, sdata); | |
4150c572 | 452 | |
c1428b3f JB |
453 | /* |
454 | * Don't count this interface for promisc/allmulti while it | |
455 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
456 | * on the master interface which will sync these down to the | |
457 | * hardware as filter flags. | |
458 | */ | |
459 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
460 | atomic_dec(&local->iff_allmultis); | |
461 | ||
462 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
463 | atomic_dec(&local->iff_promiscs); | |
464 | ||
4150c572 JB |
465 | dev_mc_unsync(local->mdev, dev); |
466 | ||
5dfdaf58 | 467 | /* APs need special treatment */ |
51fb61e7 | 468 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { |
0ec3ca44 | 469 | struct ieee80211_sub_if_data *vlan, *tmp; |
5dfdaf58 | 470 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
0ec3ca44 | 471 | |
5dfdaf58 JB |
472 | /* remove beacon */ |
473 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
474 | synchronize_rcu(); | |
475 | kfree(old_beacon); | |
476 | ||
477 | /* down all dependent devices, that is VLANs */ | |
0ec3ca44 JB |
478 | list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, |
479 | u.vlan.list) | |
480 | dev_close(vlan->dev); | |
481 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
482 | } | |
483 | ||
4150c572 | 484 | local->open_count--; |
f0706e82 | 485 | |
51fb61e7 | 486 | switch (sdata->vif.type) { |
0ec3ca44 JB |
487 | case IEEE80211_IF_TYPE_VLAN: |
488 | list_del(&sdata->u.vlan.list); | |
489 | sdata->u.vlan.ap = NULL; | |
490 | /* no need to tell driver */ | |
491 | break; | |
4150c572 | 492 | case IEEE80211_IF_TYPE_MNTR: |
3d30d949 MW |
493 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
494 | local->cooked_mntrs--; | |
495 | break; | |
496 | } | |
497 | ||
4150c572 | 498 | local->monitors--; |
8cc9a739 | 499 | if (local->monitors == 0) |
8b393f1d | 500 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
8cc9a739 MW |
501 | |
502 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
503 | local->fif_fcsfail--; | |
504 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
505 | local->fif_plcpfail--; | |
506 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
507 | local->fif_control--; | |
508 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
509 | local->fif_other_bss--; | |
510 | ||
511 | netif_tx_lock_bh(local->mdev); | |
512 | ieee80211_configure_filter(local); | |
513 | netif_tx_unlock_bh(local->mdev); | |
4150c572 | 514 | break; |
f7a92144 | 515 | case IEEE80211_IF_TYPE_MESH_POINT: |
b2c258fb JB |
516 | case IEEE80211_IF_TYPE_STA: |
517 | case IEEE80211_IF_TYPE_IBSS: | |
518 | sdata->u.sta.state = IEEE80211_DISABLED; | |
519 | del_timer_sync(&sdata->u.sta.timer); | |
2a8a9a88 | 520 | /* |
79010420 JB |
521 | * When we get here, the interface is marked down. |
522 | * Call synchronize_rcu() to wait for the RX path | |
523 | * should it be using the interface and enqueuing | |
524 | * frames at this very time on another CPU. | |
2a8a9a88 | 525 | */ |
79010420 | 526 | synchronize_rcu(); |
b2c258fb | 527 | skb_queue_purge(&sdata->u.sta.skb_queue); |
2a8a9a88 | 528 | |
ece8eddd ZY |
529 | if (local->scan_dev == sdata->dev) { |
530 | if (!local->ops->hw_scan) { | |
531 | local->sta_sw_scanning = 0; | |
532 | cancel_delayed_work(&local->scan_work); | |
533 | } else | |
534 | local->sta_hw_scanning = 0; | |
b2c258fb | 535 | } |
ece8eddd | 536 | |
b2c258fb | 537 | flush_workqueue(local->hw.workqueue); |
a10605e5 ZY |
538 | |
539 | sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED; | |
540 | kfree(sdata->u.sta.extra_ie); | |
541 | sdata->u.sta.extra_ie = NULL; | |
542 | sdata->u.sta.extra_ie_len = 0; | |
4150c572 JB |
543 | /* fall through */ |
544 | default: | |
32bfd35d | 545 | conf.vif = &sdata->vif; |
51fb61e7 | 546 | conf.type = sdata->vif.type; |
4150c572 | 547 | conf.mac_addr = dev->dev_addr; |
11a843b7 JB |
548 | /* disable all keys for as long as this netdev is down */ |
549 | ieee80211_disable_keys(sdata); | |
4150c572 | 550 | local->ops->remove_interface(local_to_hw(local), &conf); |
f0706e82 JB |
551 | } |
552 | ||
b2c258fb JB |
553 | if (local->open_count == 0) { |
554 | if (netif_running(local->mdev)) | |
555 | dev_close(local->mdev); | |
4150c572 | 556 | |
b2c258fb JB |
557 | if (local->ops->stop) |
558 | local->ops->stop(local_to_hw(local)); | |
4150c572 | 559 | |
cdcb006f ID |
560 | ieee80211_led_radio(local, 0); |
561 | ||
b2c258fb JB |
562 | tasklet_disable(&local->tx_pending_tasklet); |
563 | tasklet_disable(&local->tasklet); | |
564 | } | |
b2c258fb | 565 | |
f0706e82 JB |
566 | return 0; |
567 | } | |
568 | ||
eadc8d9e RR |
569 | int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) |
570 | { | |
571 | struct ieee80211_local *local = hw_to_local(hw); | |
572 | struct sta_info *sta; | |
573 | struct ieee80211_sub_if_data *sdata; | |
574 | u16 start_seq_num = 0; | |
575 | u8 *state; | |
576 | int ret; | |
577 | DECLARE_MAC_BUF(mac); | |
578 | ||
579 | if (tid >= STA_TID_NUM) | |
580 | return -EINVAL; | |
581 | ||
582 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
583 | printk(KERN_DEBUG "Open BA session requested for %s tid %u\n", | |
584 | print_mac(mac, ra), tid); | |
585 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
586 | ||
d0709a65 JB |
587 | rcu_read_lock(); |
588 | ||
eadc8d9e RR |
589 | sta = sta_info_get(local, ra); |
590 | if (!sta) { | |
591 | printk(KERN_DEBUG "Could not find the station\n"); | |
b83f4e15 TW |
592 | ret = -ENOENT; |
593 | goto exit; | |
eadc8d9e RR |
594 | } |
595 | ||
07346f81 | 596 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
597 | |
598 | /* we have tried too many times, receiver does not want A-MPDU */ | |
cee24a3e | 599 | if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { |
eadc8d9e | 600 | ret = -EBUSY; |
b83f4e15 | 601 | goto err_unlock_sta; |
eadc8d9e RR |
602 | } |
603 | ||
cee24a3e | 604 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e RR |
605 | /* check if the TID is not in aggregation flow already */ |
606 | if (*state != HT_AGG_STATE_IDLE) { | |
607 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
608 | printk(KERN_DEBUG "BA request denied - session is not " | |
609 | "idle on tid %u\n", tid); | |
610 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
611 | ret = -EAGAIN; | |
b83f4e15 | 612 | goto err_unlock_sta; |
eadc8d9e RR |
613 | } |
614 | ||
cee24a3e RR |
615 | /* prepare A-MPDU MLME for Tx aggregation */ |
616 | sta->ampdu_mlme.tid_tx[tid] = | |
617 | kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); | |
618 | if (!sta->ampdu_mlme.tid_tx[tid]) { | |
619 | if (net_ratelimit()) | |
620 | printk(KERN_ERR "allocate tx mlme to tid %d failed\n", | |
621 | tid); | |
622 | ret = -ENOMEM; | |
b83f4e15 | 623 | goto err_unlock_sta; |
cee24a3e RR |
624 | } |
625 | /* Tx timer */ | |
626 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function = | |
627 | sta_addba_resp_timer_expired; | |
628 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data = | |
629 | (unsigned long)&sta->timer_to_tid[tid]; | |
630 | init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); | |
631 | ||
eadc8d9e RR |
632 | /* ensure that TX flow won't interrupt us |
633 | * until the end of the call to requeue function */ | |
634 | spin_lock_bh(&local->mdev->queue_lock); | |
635 | ||
636 | /* create a new queue for this aggregation */ | |
9e723492 | 637 | ret = ieee80211_ht_agg_queue_add(local, sta, tid); |
eadc8d9e RR |
638 | |
639 | /* case no queue is available to aggregation | |
640 | * don't switch to aggregation */ | |
641 | if (ret) { | |
642 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
cee24a3e | 643 | printk(KERN_DEBUG "BA request denied - queue unavailable for" |
eadc8d9e RR |
644 | " tid %d\n", tid); |
645 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
b83f4e15 | 646 | goto err_unlock_queue; |
eadc8d9e | 647 | } |
d0709a65 | 648 | sdata = sta->sdata; |
eadc8d9e RR |
649 | |
650 | /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the | |
651 | * call back right away, it must see that the flow has begun */ | |
652 | *state |= HT_ADDBA_REQUESTED_MSK; | |
653 | ||
654 | if (local->ops->ampdu_action) | |
655 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START, | |
656 | ra, tid, &start_seq_num); | |
657 | ||
658 | if (ret) { | |
659 | /* No need to requeue the packets in the agg queue, since we | |
660 | * held the tx lock: no packet could be enqueued to the newly | |
661 | * allocated queue */ | |
9e723492 | 662 | ieee80211_ht_agg_queue_remove(local, sta, tid, 0); |
eadc8d9e | 663 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
664 | printk(KERN_DEBUG "BA request denied - HW unavailable for" |
665 | " tid %d\n", tid); | |
eadc8d9e | 666 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
eadc8d9e | 667 | *state = HT_AGG_STATE_IDLE; |
b83f4e15 | 668 | goto err_unlock_queue; |
eadc8d9e RR |
669 | } |
670 | ||
671 | /* Will put all the packets in the new SW queue */ | |
9e723492 | 672 | ieee80211_requeue(local, ieee802_1d_to_ac[tid]); |
eadc8d9e | 673 | spin_unlock_bh(&local->mdev->queue_lock); |
b83f4e15 | 674 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 675 | |
eadc8d9e RR |
676 | /* send an addBA request */ |
677 | sta->ampdu_mlme.dialog_token_allocator++; | |
cee24a3e | 678 | sta->ampdu_mlme.tid_tx[tid]->dialog_token = |
eadc8d9e | 679 | sta->ampdu_mlme.dialog_token_allocator; |
cee24a3e | 680 | sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num; |
eadc8d9e | 681 | |
b83f4e15 | 682 | |
d0709a65 | 683 | ieee80211_send_addba_request(sta->sdata->dev, ra, tid, |
cee24a3e RR |
684 | sta->ampdu_mlme.tid_tx[tid]->dialog_token, |
685 | sta->ampdu_mlme.tid_tx[tid]->ssn, | |
eadc8d9e | 686 | 0x40, 5000); |
eadc8d9e | 687 | /* activate the timer for the recipient's addBA response */ |
cee24a3e | 688 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires = |
eadc8d9e | 689 | jiffies + ADDBA_RESP_INTERVAL; |
cee24a3e | 690 | add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
eadc8d9e | 691 | printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid); |
b83f4e15 | 692 | goto exit; |
eadc8d9e | 693 | |
b83f4e15 | 694 | err_unlock_queue: |
cee24a3e RR |
695 | kfree(sta->ampdu_mlme.tid_tx[tid]); |
696 | sta->ampdu_mlme.tid_tx[tid] = NULL; | |
697 | spin_unlock_bh(&local->mdev->queue_lock); | |
698 | ret = -EBUSY; | |
b83f4e15 | 699 | err_unlock_sta: |
07346f81 | 700 | spin_unlock_bh(&sta->lock); |
b83f4e15 | 701 | exit: |
d0709a65 | 702 | rcu_read_unlock(); |
eadc8d9e RR |
703 | return ret; |
704 | } | |
705 | EXPORT_SYMBOL(ieee80211_start_tx_ba_session); | |
706 | ||
707 | int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, | |
708 | u8 *ra, u16 tid, | |
709 | enum ieee80211_back_parties initiator) | |
710 | { | |
711 | struct ieee80211_local *local = hw_to_local(hw); | |
712 | struct sta_info *sta; | |
713 | u8 *state; | |
714 | int ret = 0; | |
715 | DECLARE_MAC_BUF(mac); | |
716 | ||
717 | if (tid >= STA_TID_NUM) | |
718 | return -EINVAL; | |
719 | ||
d0709a65 | 720 | rcu_read_lock(); |
eadc8d9e | 721 | sta = sta_info_get(local, ra); |
d0709a65 JB |
722 | if (!sta) { |
723 | rcu_read_unlock(); | |
eadc8d9e | 724 | return -ENOENT; |
d0709a65 | 725 | } |
eadc8d9e RR |
726 | |
727 | /* check if the TID is in aggregation */ | |
cee24a3e | 728 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 729 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
730 | |
731 | if (*state != HT_AGG_STATE_OPERATIONAL) { | |
eadc8d9e RR |
732 | ret = -ENOENT; |
733 | goto stop_BA_exit; | |
734 | } | |
735 | ||
513a1025 RR |
736 | #ifdef CONFIG_MAC80211_HT_DEBUG |
737 | printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n", | |
738 | print_mac(mac, ra), tid); | |
739 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
740 | ||
eadc8d9e RR |
741 | ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]); |
742 | ||
743 | *state = HT_AGG_STATE_REQ_STOP_BA_MSK | | |
744 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
745 | ||
746 | if (local->ops->ampdu_action) | |
747 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP, | |
748 | ra, tid, NULL); | |
749 | ||
750 | /* case HW denied going back to legacy */ | |
751 | if (ret) { | |
752 | WARN_ON(ret != -EBUSY); | |
753 | *state = HT_AGG_STATE_OPERATIONAL; | |
754 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); | |
755 | goto stop_BA_exit; | |
756 | } | |
757 | ||
758 | stop_BA_exit: | |
07346f81 | 759 | spin_unlock_bh(&sta->lock); |
d0709a65 | 760 | rcu_read_unlock(); |
eadc8d9e RR |
761 | return ret; |
762 | } | |
763 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); | |
764 | ||
765 | void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid) | |
766 | { | |
767 | struct ieee80211_local *local = hw_to_local(hw); | |
768 | struct sta_info *sta; | |
769 | u8 *state; | |
770 | DECLARE_MAC_BUF(mac); | |
771 | ||
772 | if (tid >= STA_TID_NUM) { | |
773 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", | |
774 | tid, STA_TID_NUM); | |
775 | return; | |
776 | } | |
777 | ||
d0709a65 | 778 | rcu_read_lock(); |
eadc8d9e RR |
779 | sta = sta_info_get(local, ra); |
780 | if (!sta) { | |
d0709a65 | 781 | rcu_read_unlock(); |
eadc8d9e RR |
782 | printk(KERN_DEBUG "Could not find station: %s\n", |
783 | print_mac(mac, ra)); | |
784 | return; | |
785 | } | |
786 | ||
cee24a3e | 787 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 788 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
789 | |
790 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { | |
791 | printk(KERN_DEBUG "addBA was not requested yet, state is %d\n", | |
792 | *state); | |
07346f81 | 793 | spin_unlock_bh(&sta->lock); |
d0709a65 | 794 | rcu_read_unlock(); |
eadc8d9e RR |
795 | return; |
796 | } | |
797 | ||
798 | WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK); | |
799 | ||
800 | *state |= HT_ADDBA_DRV_READY_MSK; | |
801 | ||
802 | if (*state == HT_AGG_STATE_OPERATIONAL) { | |
803 | printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid); | |
804 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); | |
805 | } | |
07346f81 | 806 | spin_unlock_bh(&sta->lock); |
d0709a65 | 807 | rcu_read_unlock(); |
eadc8d9e RR |
808 | } |
809 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb); | |
810 | ||
811 | void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid) | |
812 | { | |
813 | struct ieee80211_local *local = hw_to_local(hw); | |
814 | struct sta_info *sta; | |
815 | u8 *state; | |
816 | int agg_queue; | |
817 | DECLARE_MAC_BUF(mac); | |
818 | ||
819 | if (tid >= STA_TID_NUM) { | |
820 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", | |
821 | tid, STA_TID_NUM); | |
822 | return; | |
823 | } | |
824 | ||
513a1025 RR |
825 | #ifdef CONFIG_MAC80211_HT_DEBUG |
826 | printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n", | |
eadc8d9e | 827 | print_mac(mac, ra), tid); |
513a1025 | 828 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
eadc8d9e | 829 | |
d0709a65 | 830 | rcu_read_lock(); |
eadc8d9e RR |
831 | sta = sta_info_get(local, ra); |
832 | if (!sta) { | |
833 | printk(KERN_DEBUG "Could not find station: %s\n", | |
834 | print_mac(mac, ra)); | |
d0709a65 | 835 | rcu_read_unlock(); |
eadc8d9e RR |
836 | return; |
837 | } | |
cee24a3e | 838 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 839 | |
b83f4e15 TW |
840 | /* NOTE: no need to use sta->lock in this state check, as |
841 | * ieee80211_stop_tx_ba_session will let only | |
842 | * one stop call to pass through per sta/tid */ | |
eadc8d9e RR |
843 | if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) { |
844 | printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n"); | |
d0709a65 | 845 | rcu_read_unlock(); |
eadc8d9e RR |
846 | return; |
847 | } | |
848 | ||
849 | if (*state & HT_AGG_STATE_INITIATOR_MSK) | |
d0709a65 | 850 | ieee80211_send_delba(sta->sdata->dev, ra, tid, |
eadc8d9e RR |
851 | WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); |
852 | ||
853 | agg_queue = sta->tid_to_tx_q[tid]; | |
854 | ||
855 | /* avoid ordering issues: we are the only one that can modify | |
856 | * the content of the qdiscs */ | |
857 | spin_lock_bh(&local->mdev->queue_lock); | |
858 | /* remove the queue for this aggregation */ | |
9e723492 | 859 | ieee80211_ht_agg_queue_remove(local, sta, tid, 1); |
eadc8d9e RR |
860 | spin_unlock_bh(&local->mdev->queue_lock); |
861 | ||
862 | /* we just requeued the all the frames that were in the removed | |
863 | * queue, and since we might miss a softirq we do netif_schedule. | |
864 | * ieee80211_wake_queue is not used here as this queue is not | |
865 | * necessarily stopped */ | |
866 | netif_schedule(local->mdev); | |
b83f4e15 | 867 | spin_lock_bh(&sta->lock); |
eadc8d9e | 868 | *state = HT_AGG_STATE_IDLE; |
cee24a3e RR |
869 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
870 | kfree(sta->ampdu_mlme.tid_tx[tid]); | |
871 | sta->ampdu_mlme.tid_tx[tid] = NULL; | |
07346f81 | 872 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 873 | |
d0709a65 | 874 | rcu_read_unlock(); |
eadc8d9e RR |
875 | } |
876 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb); | |
877 | ||
878 | void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, | |
879 | const u8 *ra, u16 tid) | |
880 | { | |
881 | struct ieee80211_local *local = hw_to_local(hw); | |
882 | struct ieee80211_ra_tid *ra_tid; | |
883 | struct sk_buff *skb = dev_alloc_skb(0); | |
884 | ||
885 | if (unlikely(!skb)) { | |
886 | if (net_ratelimit()) | |
887 | printk(KERN_WARNING "%s: Not enough memory, " | |
888 | "dropping start BA session", skb->dev->name); | |
889 | return; | |
890 | } | |
891 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
892 | memcpy(&ra_tid->ra, ra, ETH_ALEN); | |
893 | ra_tid->tid = tid; | |
894 | ||
895 | skb->pkt_type = IEEE80211_ADDBA_MSG; | |
896 | skb_queue_tail(&local->skb_queue, skb); | |
897 | tasklet_schedule(&local->tasklet); | |
898 | } | |
899 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); | |
900 | ||
901 | void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, | |
902 | const u8 *ra, u16 tid) | |
903 | { | |
904 | struct ieee80211_local *local = hw_to_local(hw); | |
905 | struct ieee80211_ra_tid *ra_tid; | |
906 | struct sk_buff *skb = dev_alloc_skb(0); | |
907 | ||
908 | if (unlikely(!skb)) { | |
909 | if (net_ratelimit()) | |
910 | printk(KERN_WARNING "%s: Not enough memory, " | |
911 | "dropping stop BA session", skb->dev->name); | |
912 | return; | |
913 | } | |
914 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
915 | memcpy(&ra_tid->ra, ra, ETH_ALEN); | |
916 | ra_tid->tid = tid; | |
917 | ||
918 | skb->pkt_type = IEEE80211_DELBA_MSG; | |
919 | skb_queue_tail(&local->skb_queue, skb); | |
920 | tasklet_schedule(&local->tasklet); | |
921 | } | |
922 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); | |
923 | ||
f0706e82 JB |
924 | static void ieee80211_set_multicast_list(struct net_device *dev) |
925 | { | |
926 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
927 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4150c572 | 928 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
f0706e82 | 929 | |
4150c572 JB |
930 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
931 | promisc = !!(dev->flags & IFF_PROMISC); | |
b52f2198 JB |
932 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
933 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
4150c572 JB |
934 | |
935 | if (allmulti != sdata_allmulti) { | |
936 | if (dev->flags & IFF_ALLMULTI) | |
53918994 | 937 | atomic_inc(&local->iff_allmultis); |
4150c572 | 938 | else |
53918994 | 939 | atomic_dec(&local->iff_allmultis); |
13262ffd | 940 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
f0706e82 | 941 | } |
4150c572 JB |
942 | |
943 | if (promisc != sdata_promisc) { | |
944 | if (dev->flags & IFF_PROMISC) | |
53918994 | 945 | atomic_inc(&local->iff_promiscs); |
4150c572 | 946 | else |
53918994 | 947 | atomic_dec(&local->iff_promiscs); |
13262ffd | 948 | sdata->flags ^= IEEE80211_SDATA_PROMISC; |
f0706e82 | 949 | } |
4150c572 JB |
950 | |
951 | dev_mc_sync(local->mdev, dev); | |
f0706e82 JB |
952 | } |
953 | ||
3b04ddde SH |
954 | static const struct header_ops ieee80211_header_ops = { |
955 | .create = eth_header, | |
956 | .parse = header_parse_80211, | |
957 | .rebuild = eth_rebuild_header, | |
958 | .cache = eth_header_cache, | |
959 | .cache_update = eth_header_cache_update, | |
960 | }; | |
961 | ||
f9d540ee | 962 | /* Must not be called for mdev */ |
b2c258fb | 963 | void ieee80211_if_setup(struct net_device *dev) |
f0706e82 | 964 | { |
b2c258fb JB |
965 | ether_setup(dev); |
966 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
967 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
968 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
969 | dev->change_mtu = ieee80211_change_mtu; | |
b2c258fb JB |
970 | dev->open = ieee80211_open; |
971 | dev->stop = ieee80211_stop; | |
b2c258fb JB |
972 | dev->destructor = ieee80211_if_free; |
973 | } | |
f0706e82 | 974 | |
b2c258fb JB |
975 | /* everything else */ |
976 | ||
b2c258fb | 977 | static int __ieee80211_if_config(struct net_device *dev, |
e039fa4a | 978 | struct sk_buff *beacon) |
b2c258fb JB |
979 | { |
980 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
981 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
982 | struct ieee80211_if_conf conf; | |
b2c258fb JB |
983 | |
984 | if (!local->ops->config_interface || !netif_running(dev)) | |
f0706e82 | 985 | return 0; |
f0706e82 | 986 | |
b2c258fb | 987 | memset(&conf, 0, sizeof(conf)); |
51fb61e7 JB |
988 | conf.type = sdata->vif.type; |
989 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
990 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { | |
4150c572 | 991 | conf.bssid = sdata->u.sta.bssid; |
b2c258fb JB |
992 | conf.ssid = sdata->u.sta.ssid; |
993 | conf.ssid_len = sdata->u.sta.ssid_len; | |
902acc78 | 994 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
f7a92144 LCC |
995 | conf.beacon = beacon; |
996 | ieee80211_start_mesh(dev); | |
51fb61e7 | 997 | } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { |
b2c258fb JB |
998 | conf.ssid = sdata->u.ap.ssid; |
999 | conf.ssid_len = sdata->u.ap.ssid_len; | |
b2c258fb | 1000 | conf.beacon = beacon; |
f0706e82 | 1001 | } |
b2c258fb | 1002 | return local->ops->config_interface(local_to_hw(local), |
32bfd35d | 1003 | &sdata->vif, &conf); |
f0706e82 JB |
1004 | } |
1005 | ||
b2c258fb JB |
1006 | int ieee80211_if_config(struct net_device *dev) |
1007 | { | |
f7a92144 LCC |
1008 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1009 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1010 | if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT && | |
1011 | (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) | |
1012 | return ieee80211_if_config_beacon(dev); | |
e039fa4a | 1013 | return __ieee80211_if_config(dev, NULL); |
b2c258fb | 1014 | } |
f0706e82 | 1015 | |
b2c258fb | 1016 | int ieee80211_if_config_beacon(struct net_device *dev) |
f0706e82 | 1017 | { |
f0706e82 | 1018 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
32bfd35d | 1019 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b2c258fb | 1020 | struct sk_buff *skb; |
f0706e82 | 1021 | |
b2c258fb | 1022 | if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) |
f0706e82 | 1023 | return 0; |
e039fa4a | 1024 | skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif); |
b2c258fb JB |
1025 | if (!skb) |
1026 | return -ENOMEM; | |
e039fa4a | 1027 | return __ieee80211_if_config(dev, skb); |
b2c258fb | 1028 | } |
f0706e82 | 1029 | |
b2c258fb JB |
1030 | int ieee80211_hw_config(struct ieee80211_local *local) |
1031 | { | |
b2c258fb JB |
1032 | struct ieee80211_channel *chan; |
1033 | int ret = 0; | |
f0706e82 | 1034 | |
8318d78a | 1035 | if (local->sta_sw_scanning) |
b2c258fb | 1036 | chan = local->scan_channel; |
8318d78a | 1037 | else |
b2c258fb | 1038 | chan = local->oper_channel; |
f0706e82 | 1039 | |
8318d78a JB |
1040 | local->hw.conf.channel = chan; |
1041 | ||
1042 | if (!local->hw.conf.power_level) | |
1043 | local->hw.conf.power_level = chan->max_power; | |
1044 | else | |
1045 | local->hw.conf.power_level = min(chan->max_power, | |
1046 | local->hw.conf.power_level); | |
1047 | ||
1048 | local->hw.conf.max_antenna_gain = chan->max_antenna_gain; | |
f0706e82 | 1049 | |
b2c258fb | 1050 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
8318d78a JB |
1051 | printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n", |
1052 | wiphy_name(local->hw.wiphy), chan->center_freq); | |
1053 | #endif | |
b2c258fb | 1054 | |
f7c4daed | 1055 | if (local->open_count) |
b2c258fb | 1056 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); |
f0706e82 | 1057 | |
b2c258fb JB |
1058 | return ret; |
1059 | } | |
f0706e82 | 1060 | |
d3c990fb | 1061 | /** |
38668c05 TW |
1062 | * ieee80211_handle_ht should be used only after legacy configuration |
1063 | * has been determined namely band, as ht configuration depends upon | |
1064 | * the hardware's HT abilities for a _specific_ band. | |
d3c990fb | 1065 | */ |
38668c05 | 1066 | u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht, |
d3c990fb RR |
1067 | struct ieee80211_ht_info *req_ht_cap, |
1068 | struct ieee80211_ht_bss_info *req_bss_cap) | |
1069 | { | |
1070 | struct ieee80211_conf *conf = &local->hw.conf; | |
8318d78a | 1071 | struct ieee80211_supported_band *sband; |
38668c05 TW |
1072 | struct ieee80211_ht_info ht_conf; |
1073 | struct ieee80211_ht_bss_info ht_bss_conf; | |
38668c05 | 1074 | u32 changed = 0; |
edcdf8b2 RR |
1075 | int i; |
1076 | u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS; | |
1077 | u8 tx_mcs_set_cap; | |
d3c990fb | 1078 | |
8318d78a JB |
1079 | sband = local->hw.wiphy->bands[conf->channel->band]; |
1080 | ||
edcdf8b2 RR |
1081 | memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info)); |
1082 | memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info)); | |
1083 | ||
d3c990fb | 1084 | /* HT is not supported */ |
8318d78a | 1085 | if (!sband->ht_info.ht_supported) { |
d3c990fb | 1086 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
edcdf8b2 | 1087 | goto out; |
d3c990fb RR |
1088 | } |
1089 | ||
edcdf8b2 RR |
1090 | /* disable HT */ |
1091 | if (!enable_ht) { | |
1092 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) | |
38668c05 | 1093 | changed |= BSS_CHANGED_HT; |
edcdf8b2 RR |
1094 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
1095 | conf->ht_conf.ht_supported = 0; | |
1096 | goto out; | |
1097 | } | |
38668c05 | 1098 | |
38668c05 | 1099 | |
edcdf8b2 RR |
1100 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) |
1101 | changed |= BSS_CHANGED_HT; | |
38668c05 | 1102 | |
edcdf8b2 RR |
1103 | conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; |
1104 | ht_conf.ht_supported = 1; | |
38668c05 | 1105 | |
edcdf8b2 RR |
1106 | ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap; |
1107 | ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS); | |
1108 | ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS; | |
1109 | ht_bss_conf.primary_channel = req_bss_cap->primary_channel; | |
1110 | ht_bss_conf.bss_cap = req_bss_cap->bss_cap; | |
1111 | ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; | |
38668c05 | 1112 | |
edcdf8b2 RR |
1113 | ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; |
1114 | ht_conf.ampdu_density = req_ht_cap->ampdu_density; | |
38668c05 | 1115 | |
edcdf8b2 RR |
1116 | /* Bits 96-100 */ |
1117 | tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12]; | |
1118 | ||
1119 | /* configure suppoerted Tx MCS according to requested MCS | |
1120 | * (based in most cases on Rx capabilities of peer) and self | |
1121 | * Tx MCS capabilities (as defined by low level driver HW | |
1122 | * Tx capabilities) */ | |
1123 | if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED)) | |
1124 | goto check_changed; | |
d3c990fb | 1125 | |
edcdf8b2 RR |
1126 | /* Counting from 0 therfore + 1 */ |
1127 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF) | |
1128 | max_tx_streams = ((tx_mcs_set_cap & | |
1129 | IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1; | |
1130 | ||
1131 | for (i = 0; i < max_tx_streams; i++) | |
1132 | ht_conf.supp_mcs_set[i] = | |
1133 | sband->ht_info.supp_mcs_set[i] & | |
1134 | req_ht_cap->supp_mcs_set[i]; | |
1135 | ||
1136 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM) | |
1137 | for (i = IEEE80211_SUPP_MCS_SET_UEQM; | |
1138 | i < IEEE80211_SUPP_MCS_SET_LEN; i++) | |
1139 | ht_conf.supp_mcs_set[i] = | |
1140 | sband->ht_info.supp_mcs_set[i] & | |
1141 | req_ht_cap->supp_mcs_set[i]; | |
1142 | ||
1143 | check_changed: | |
1144 | /* if bss configuration changed store the new one */ | |
1145 | if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) || | |
1146 | memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) { | |
1147 | changed |= BSS_CHANGED_HT; | |
1148 | memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf)); | |
1149 | memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf)); | |
1150 | } | |
1151 | out: | |
38668c05 | 1152 | return changed; |
d3c990fb RR |
1153 | } |
1154 | ||
471b3efd JB |
1155 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
1156 | u32 changed) | |
d9430a32 | 1157 | { |
471b3efd JB |
1158 | struct ieee80211_local *local = sdata->local; |
1159 | ||
1160 | if (!changed) | |
1161 | return; | |
1162 | ||
1163 | if (local->ops->bss_info_changed) | |
1164 | local->ops->bss_info_changed(local_to_hw(local), | |
1165 | &sdata->vif, | |
1166 | &sdata->bss_conf, | |
1167 | changed); | |
d9430a32 DD |
1168 | } |
1169 | ||
1170 | void ieee80211_reset_erp_info(struct net_device *dev) | |
1171 | { | |
1172 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1173 | ||
471b3efd JB |
1174 | sdata->bss_conf.use_cts_prot = 0; |
1175 | sdata->bss_conf.use_short_preamble = 0; | |
1176 | ieee80211_bss_info_change_notify(sdata, | |
1177 | BSS_CHANGED_ERP_CTS_PROT | | |
1178 | BSS_CHANGED_ERP_PREAMBLE); | |
d9430a32 DD |
1179 | } |
1180 | ||
f0706e82 | 1181 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 1182 | struct sk_buff *skb) |
f0706e82 JB |
1183 | { |
1184 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 1185 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
1186 | int tmp; |
1187 | ||
1188 | skb->dev = local->mdev; | |
f0706e82 | 1189 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 1190 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
1191 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
1192 | tmp = skb_queue_len(&local->skb_queue) + | |
1193 | skb_queue_len(&local->skb_queue_unreliable); | |
1194 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
1195 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
1196 | dev_kfree_skb_irq(skb); |
1197 | tmp--; | |
1198 | I802_DEBUG_INC(local->tx_status_drop); | |
1199 | } | |
1200 | tasklet_schedule(&local->tasklet); | |
1201 | } | |
1202 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
1203 | ||
1204 | static void ieee80211_tasklet_handler(unsigned long data) | |
1205 | { | |
1206 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
1207 | struct sk_buff *skb; | |
1208 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 1209 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
1210 | |
1211 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
1212 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
1213 | switch (skb->pkt_type) { | |
1214 | case IEEE80211_RX_MSG: | |
1215 | /* status is in skb->cb */ | |
1216 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 1217 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
1218 | * netstack. */ |
1219 | skb->pkt_type = 0; | |
1220 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
1221 | break; | |
1222 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 1223 | skb->pkt_type = 0; |
e039fa4a | 1224 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 1225 | break; |
eadc8d9e RR |
1226 | case IEEE80211_DELBA_MSG: |
1227 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
1228 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
1229 | ra_tid->ra, ra_tid->tid); | |
1230 | dev_kfree_skb(skb); | |
1231 | break; | |
1232 | case IEEE80211_ADDBA_MSG: | |
1233 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
1234 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
1235 | ra_tid->ra, ra_tid->tid); | |
1236 | dev_kfree_skb(skb); | |
1237 | break ; | |
f0706e82 JB |
1238 | default: /* should never get here! */ |
1239 | printk(KERN_ERR "%s: Unknown message type (%d)\n", | |
dd1cd4c6 | 1240 | wiphy_name(local->hw.wiphy), skb->pkt_type); |
f0706e82 JB |
1241 | dev_kfree_skb(skb); |
1242 | break; | |
1243 | } | |
1244 | } | |
1245 | } | |
1246 | ||
f0706e82 JB |
1247 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
1248 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
1249 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
1250 | * Also, tx_packet_data in cb is restored from tx_control. */ | |
1251 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, | |
1252 | struct ieee80211_key *key, | |
e039fa4a | 1253 | struct sk_buff *skb) |
f0706e82 JB |
1254 | { |
1255 | int hdrlen, iv_len, mic_len; | |
e039fa4a JB |
1256 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1257 | ||
1258 | info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
1259 | IEEE80211_TX_CTL_DO_NOT_ENCRYPT | | |
1260 | IEEE80211_TX_CTL_REQUEUE | | |
1261 | IEEE80211_TX_CTL_EAPOL_FRAME; | |
f0706e82 JB |
1262 | |
1263 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
1264 | ||
1265 | if (!key) | |
1266 | goto no_key; | |
1267 | ||
8f20fc24 | 1268 | switch (key->conf.alg) { |
f0706e82 JB |
1269 | case ALG_WEP: |
1270 | iv_len = WEP_IV_LEN; | |
1271 | mic_len = WEP_ICV_LEN; | |
1272 | break; | |
1273 | case ALG_TKIP: | |
1274 | iv_len = TKIP_IV_LEN; | |
1275 | mic_len = TKIP_ICV_LEN; | |
1276 | break; | |
1277 | case ALG_CCMP: | |
1278 | iv_len = CCMP_HDR_LEN; | |
1279 | mic_len = CCMP_MIC_LEN; | |
1280 | break; | |
1281 | default: | |
1282 | goto no_key; | |
1283 | } | |
1284 | ||
8f20fc24 | 1285 | if (skb->len >= mic_len && |
11a843b7 | 1286 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 JB |
1287 | skb_trim(skb, skb->len - mic_len); |
1288 | if (skb->len >= iv_len && skb->len > hdrlen) { | |
1289 | memmove(skb->data + iv_len, skb->data, hdrlen); | |
1290 | skb_pull(skb, iv_len); | |
1291 | } | |
1292 | ||
1293 | no_key: | |
1294 | { | |
1295 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1296 | u16 fc = le16_to_cpu(hdr->frame_control); | |
1297 | if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { | |
1298 | fc &= ~IEEE80211_STYPE_QOS_DATA; | |
1299 | hdr->frame_control = cpu_to_le16(fc); | |
1300 | memmove(skb->data + 2, skb->data, hdrlen - 2); | |
1301 | skb_pull(skb, 2); | |
1302 | } | |
1303 | } | |
1304 | } | |
1305 | ||
d46e144b JB |
1306 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
1307 | struct sta_info *sta, | |
e039fa4a | 1308 | struct sk_buff *skb) |
d46e144b | 1309 | { |
e039fa4a JB |
1310 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1311 | ||
d46e144b JB |
1312 | sta->tx_filtered_count++; |
1313 | ||
1314 | /* | |
1315 | * Clear the TX filter mask for this STA when sending the next | |
1316 | * packet. If the STA went to power save mode, this will happen | |
1317 | * happen when it wakes up for the next time. | |
1318 | */ | |
07346f81 | 1319 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
1320 | |
1321 | /* | |
1322 | * This code races in the following way: | |
1323 | * | |
1324 | * (1) STA sends frame indicating it will go to sleep and does so | |
1325 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
1326 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
1327 | * (4) we get TX status before having processed the frame and | |
1328 | * knowing that the STA has gone to sleep. | |
1329 | * | |
1330 | * This is actually quite unlikely even when both those events are | |
1331 | * processed from interrupts coming in quickly after one another or | |
1332 | * even at the same time because we queue both TX status events and | |
1333 | * RX frames to be processed by a tasklet and process them in the | |
1334 | * same order that they were received or TX status last. Hence, there | |
1335 | * is no race as long as the frame RX is processed before the next TX | |
1336 | * status, which drivers can ensure, see below. | |
1337 | * | |
1338 | * Note that this can only happen if the hardware or firmware can | |
1339 | * actually add STAs to the filter list, if this is done by the | |
1340 | * driver in response to set_tim() (which will only reduce the race | |
1341 | * this whole filtering tries to solve, not completely solve it) | |
1342 | * this situation cannot happen. | |
1343 | * | |
1344 | * To completely solve this race drivers need to make sure that they | |
1345 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
1346 | * functions and | |
1347 | * (b) always process RX events before TX status events if ordering | |
1348 | * can be unknown, for example with different interrupt status | |
1349 | * bits. | |
1350 | */ | |
07346f81 | 1351 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 1352 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 1353 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
1354 | skb_queue_tail(&sta->tx_filtered, skb); |
1355 | return; | |
1356 | } | |
1357 | ||
07346f81 | 1358 | if (!test_sta_flags(sta, WLAN_STA_PS) && |
e039fa4a | 1359 | !(info->flags & IEEE80211_TX_CTL_REQUEUE)) { |
d46e144b | 1360 | /* Software retry the packet once */ |
e039fa4a JB |
1361 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
1362 | ieee80211_remove_tx_extra(local, sta->key, skb); | |
d46e144b JB |
1363 | dev_queue_xmit(skb); |
1364 | return; | |
1365 | } | |
1366 | ||
1367 | if (net_ratelimit()) | |
1368 | printk(KERN_DEBUG "%s: dropped TX filtered frame, " | |
1369 | "queue_len=%d PS=%d @%lu\n", | |
1370 | wiphy_name(local->hw.wiphy), | |
1371 | skb_queue_len(&sta->tx_filtered), | |
07346f81 | 1372 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
d46e144b JB |
1373 | dev_kfree_skb(skb); |
1374 | } | |
1375 | ||
e039fa4a | 1376 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
1377 | { |
1378 | struct sk_buff *skb2; | |
1379 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1380 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 1381 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 1382 | u16 frag, type; |
b306f453 JB |
1383 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
1384 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 1385 | struct net_device *prev_dev = NULL; |
f0706e82 | 1386 | |
d0709a65 JB |
1387 | rcu_read_lock(); |
1388 | ||
e039fa4a | 1389 | if (info->status.excessive_retries) { |
f0706e82 JB |
1390 | struct sta_info *sta; |
1391 | sta = sta_info_get(local, hdr->addr1); | |
1392 | if (sta) { | |
07346f81 | 1393 | if (test_sta_flags(sta, WLAN_STA_PS)) { |
d46e144b JB |
1394 | /* |
1395 | * The STA is in power save mode, so assume | |
f0706e82 JB |
1396 | * that this TX packet failed because of that. |
1397 | */ | |
e039fa4a | 1398 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 1399 | rcu_read_unlock(); |
d46e144b | 1400 | return; |
f0706e82 | 1401 | } |
f0706e82 JB |
1402 | } |
1403 | } | |
1404 | ||
e039fa4a | 1405 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
f0706e82 JB |
1406 | struct sta_info *sta; |
1407 | sta = sta_info_get(local, hdr->addr1); | |
1408 | if (sta) { | |
e039fa4a | 1409 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 1410 | rcu_read_unlock(); |
f0706e82 JB |
1411 | return; |
1412 | } | |
1abbe498 | 1413 | } else |
e039fa4a | 1414 | rate_control_tx_status(local->mdev, skb); |
f0706e82 | 1415 | |
d0709a65 JB |
1416 | rcu_read_unlock(); |
1417 | ||
f0706e82 JB |
1418 | ieee80211_led_tx(local, 0); |
1419 | ||
1420 | /* SNMP counters | |
1421 | * Fragments are passed to low-level drivers as separate skbs, so these | |
1422 | * are actually fragments, not frames. Update frame counters only for | |
1423 | * the first fragment of the frame. */ | |
1424 | ||
1425 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
1426 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
1427 | ||
e039fa4a | 1428 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
1429 | if (frag == 0) { |
1430 | local->dot11TransmittedFrameCount++; | |
1431 | if (is_multicast_ether_addr(hdr->addr1)) | |
1432 | local->dot11MulticastTransmittedFrameCount++; | |
e039fa4a | 1433 | if (info->status.retry_count > 0) |
f0706e82 | 1434 | local->dot11RetryCount++; |
e039fa4a | 1435 | if (info->status.retry_count > 1) |
f0706e82 JB |
1436 | local->dot11MultipleRetryCount++; |
1437 | } | |
1438 | ||
1439 | /* This counter shall be incremented for an acknowledged MPDU | |
1440 | * with an individual address in the address 1 field or an MPDU | |
1441 | * with a multicast address in the address 1 field of type Data | |
1442 | * or Management. */ | |
1443 | if (!is_multicast_ether_addr(hdr->addr1) || | |
1444 | type == IEEE80211_FTYPE_DATA || | |
1445 | type == IEEE80211_FTYPE_MGMT) | |
1446 | local->dot11TransmittedFragmentCount++; | |
1447 | } else { | |
1448 | if (frag == 0) | |
1449 | local->dot11FailedCount++; | |
1450 | } | |
1451 | ||
b306f453 JB |
1452 | /* this was a transmitted frame, but now we want to reuse it */ |
1453 | skb_orphan(skb); | |
1454 | ||
3d30d949 MW |
1455 | /* |
1456 | * This is a bit racy but we can avoid a lot of work | |
1457 | * with this test... | |
1458 | */ | |
1459 | if (!local->monitors && !local->cooked_mntrs) { | |
f0706e82 JB |
1460 | dev_kfree_skb(skb); |
1461 | return; | |
1462 | } | |
1463 | ||
b306f453 | 1464 | /* send frame to monitor interfaces now */ |
f0706e82 | 1465 | |
b306f453 JB |
1466 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
1467 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
1468 | dev_kfree_skb(skb); |
1469 | return; | |
1470 | } | |
f0706e82 | 1471 | |
988c0f72 | 1472 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
1473 | skb_push(skb, sizeof(*rthdr)); |
1474 | ||
1475 | memset(rthdr, 0, sizeof(*rthdr)); | |
1476 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
1477 | rthdr->hdr.it_present = | |
1478 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
1479 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
1480 | ||
e039fa4a | 1481 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
1482 | !is_multicast_ether_addr(hdr->addr1)) |
1483 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
1484 | ||
e039fa4a JB |
1485 | if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) && |
1486 | (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) | |
b306f453 | 1487 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e039fa4a | 1488 | else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) |
b306f453 JB |
1489 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
1490 | ||
e039fa4a | 1491 | rthdr->data_retries = info->status.retry_count; |
b306f453 | 1492 | |
3d30d949 MW |
1493 | /* XXX: is this sufficient for BPF? */ |
1494 | skb_set_mac_header(skb, 0); | |
1495 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1496 | skb->pkt_type = PACKET_OTHERHOST; | |
1497 | skb->protocol = htons(ETH_P_802_2); | |
1498 | memset(skb->cb, 0, sizeof(skb->cb)); | |
1499 | ||
79010420 | 1500 | rcu_read_lock(); |
79010420 | 1501 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 1502 | if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) { |
b306f453 JB |
1503 | if (!netif_running(sdata->dev)) |
1504 | continue; | |
3d30d949 MW |
1505 | |
1506 | if (prev_dev) { | |
79010420 | 1507 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
1508 | if (skb2) { |
1509 | skb2->dev = prev_dev; | |
1510 | netif_rx(skb2); | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | prev_dev = sdata->dev; | |
b306f453 JB |
1515 | } |
1516 | } | |
3d30d949 MW |
1517 | if (prev_dev) { |
1518 | skb->dev = prev_dev; | |
1519 | netif_rx(skb); | |
1520 | skb = NULL; | |
1521 | } | |
79010420 | 1522 | rcu_read_unlock(); |
3d30d949 | 1523 | dev_kfree_skb(skb); |
f0706e82 JB |
1524 | } |
1525 | EXPORT_SYMBOL(ieee80211_tx_status); | |
1526 | ||
f0706e82 JB |
1527 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
1528 | const struct ieee80211_ops *ops) | |
1529 | { | |
f0706e82 | 1530 | struct ieee80211_local *local; |
f0706e82 JB |
1531 | int priv_size; |
1532 | struct wiphy *wiphy; | |
1533 | ||
1534 | /* Ensure 32-byte alignment of our private data and hw private data. | |
1535 | * We use the wiphy priv data for both our ieee80211_local and for | |
1536 | * the driver's private data | |
1537 | * | |
1538 | * In memory it'll be like this: | |
1539 | * | |
1540 | * +-------------------------+ | |
1541 | * | struct wiphy | | |
1542 | * +-------------------------+ | |
1543 | * | struct ieee80211_local | | |
1544 | * +-------------------------+ | |
1545 | * | driver's private data | | |
1546 | * +-------------------------+ | |
1547 | * | |
1548 | */ | |
1549 | priv_size = ((sizeof(struct ieee80211_local) + | |
1550 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
1551 | priv_data_len; | |
1552 | ||
1553 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
1554 | ||
1555 | if (!wiphy) | |
1556 | return NULL; | |
1557 | ||
1558 | wiphy->privid = mac80211_wiphy_privid; | |
1559 | ||
1560 | local = wiphy_priv(wiphy); | |
1561 | local->hw.wiphy = wiphy; | |
1562 | ||
1563 | local->hw.priv = (char *)local + | |
1564 | ((sizeof(struct ieee80211_local) + | |
1565 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
1566 | ||
4480f15c | 1567 | BUG_ON(!ops->tx); |
4150c572 JB |
1568 | BUG_ON(!ops->start); |
1569 | BUG_ON(!ops->stop); | |
4480f15c JB |
1570 | BUG_ON(!ops->config); |
1571 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
1572 | BUG_ON(!ops->remove_interface); |
1573 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
1574 | local->ops = ops; |
1575 | ||
f0706e82 JB |
1576 | local->hw.queues = 1; /* default */ |
1577 | ||
f0706e82 JB |
1578 | local->bridge_packets = 1; |
1579 | ||
1580 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; | |
1581 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
1582 | local->short_retry_limit = 7; | |
1583 | local->long_retry_limit = 4; | |
1584 | local->hw.conf.radio_enabled = 1; | |
f0706e82 | 1585 | |
79010420 | 1586 | INIT_LIST_HEAD(&local->interfaces); |
f0706e82 | 1587 | |
b16bd15c JB |
1588 | spin_lock_init(&local->key_lock); |
1589 | ||
f0706e82 | 1590 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); |
f0706e82 JB |
1591 | |
1592 | sta_info_init(local); | |
1593 | ||
f0706e82 JB |
1594 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
1595 | (unsigned long)local); | |
1596 | tasklet_disable(&local->tx_pending_tasklet); | |
1597 | ||
1598 | tasklet_init(&local->tasklet, | |
1599 | ieee80211_tasklet_handler, | |
1600 | (unsigned long) local); | |
1601 | tasklet_disable(&local->tasklet); | |
1602 | ||
1603 | skb_queue_head_init(&local->skb_queue); | |
1604 | skb_queue_head_init(&local->skb_queue_unreliable); | |
1605 | ||
1606 | return local_to_hw(local); | |
1607 | } | |
1608 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
1609 | ||
1610 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
1611 | { | |
1612 | struct ieee80211_local *local = hw_to_local(hw); | |
1613 | const char *name; | |
1614 | int result; | |
8318d78a | 1615 | enum ieee80211_band band; |
96d51056 JB |
1616 | struct net_device *mdev; |
1617 | struct ieee80211_sub_if_data *sdata; | |
8318d78a JB |
1618 | |
1619 | /* | |
1620 | * generic code guarantees at least one band, | |
1621 | * set this very early because much code assumes | |
1622 | * that hw.conf.channel is assigned | |
1623 | */ | |
1624 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1625 | struct ieee80211_supported_band *sband; | |
1626 | ||
1627 | sband = local->hw.wiphy->bands[band]; | |
1628 | if (sband) { | |
1629 | /* init channel we're on */ | |
1630 | local->hw.conf.channel = | |
1631 | local->oper_channel = | |
1632 | local->scan_channel = &sband->channels[0]; | |
1633 | break; | |
1634 | } | |
1635 | } | |
f0706e82 JB |
1636 | |
1637 | result = wiphy_register(local->hw.wiphy); | |
1638 | if (result < 0) | |
1639 | return result; | |
1640 | ||
e2530083 JB |
1641 | /* |
1642 | * We use the number of queues for feature tests (QoS, HT) internally | |
1643 | * so restrict them appropriately. | |
1644 | */ | |
1645 | #ifdef CONFIG_MAC80211_QOS | |
1646 | if (hw->queues > IEEE80211_MAX_QUEUES) | |
1647 | hw->queues = IEEE80211_MAX_QUEUES; | |
1648 | if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) | |
1649 | hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; | |
1650 | if (hw->queues < 4) | |
1651 | hw->ampdu_queues = 0; | |
1652 | #else | |
1653 | hw->queues = 1; | |
1654 | hw->ampdu_queues = 0; | |
1655 | #endif | |
1656 | ||
96d51056 | 1657 | /* for now, mdev needs sub_if_data :/ */ |
e2530083 JB |
1658 | mdev = alloc_netdev_mq(sizeof(struct ieee80211_sub_if_data), |
1659 | "wmaster%d", ether_setup, | |
1660 | ieee80211_num_queues(hw)); | |
96d51056 JB |
1661 | if (!mdev) |
1662 | goto fail_mdev_alloc; | |
1663 | ||
e2530083 JB |
1664 | if (ieee80211_num_queues(hw) > 1) |
1665 | mdev->features |= NETIF_F_MULTI_QUEUE; | |
1666 | ||
96d51056 JB |
1667 | sdata = IEEE80211_DEV_TO_SUB_IF(mdev); |
1668 | mdev->ieee80211_ptr = &sdata->wdev; | |
1669 | sdata->wdev.wiphy = local->hw.wiphy; | |
1670 | ||
1671 | local->mdev = mdev; | |
1672 | ||
1673 | ieee80211_rx_bss_list_init(mdev); | |
1674 | ||
1675 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
1676 | mdev->open = ieee80211_master_open; | |
1677 | mdev->stop = ieee80211_master_stop; | |
1678 | mdev->type = ARPHRD_IEEE80211; | |
1679 | mdev->header_ops = &ieee80211_header_ops; | |
1680 | mdev->set_multicast_list = ieee80211_master_set_multicast_list; | |
1681 | ||
1682 | sdata->vif.type = IEEE80211_IF_TYPE_AP; | |
1683 | sdata->dev = mdev; | |
1684 | sdata->local = local; | |
1685 | sdata->u.ap.force_unicast_rateidx = -1; | |
1686 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
1687 | ieee80211_if_sdata_init(sdata); | |
1688 | ||
1689 | /* no RCU needed since we're still during init phase */ | |
1690 | list_add_tail(&sdata->list, &local->interfaces); | |
1691 | ||
f0706e82 JB |
1692 | name = wiphy_dev(local->hw.wiphy)->driver->name; |
1693 | local->hw.workqueue = create_singlethread_workqueue(name); | |
1694 | if (!local->hw.workqueue) { | |
1695 | result = -ENOMEM; | |
1696 | goto fail_workqueue; | |
1697 | } | |
1698 | ||
b306f453 JB |
1699 | /* |
1700 | * The hardware needs headroom for sending the frame, | |
1701 | * and we need some headroom for passing the frame to monitor | |
1702 | * interfaces, but never both at the same time. | |
1703 | */ | |
33ccad35 JB |
1704 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
1705 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 1706 | |
e9f207f0 JB |
1707 | debugfs_hw_add(local); |
1708 | ||
f0706e82 JB |
1709 | local->hw.conf.beacon_int = 1000; |
1710 | ||
566bfe5a BR |
1711 | local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | |
1712 | IEEE80211_HW_SIGNAL_DB | | |
1713 | IEEE80211_HW_SIGNAL_DBM) ? | |
f0706e82 | 1714 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; |
566bfe5a | 1715 | local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? |
f0706e82 | 1716 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; |
566bfe5a | 1717 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
f0706e82 JB |
1718 | local->wstats_flags |= IW_QUAL_DBM; |
1719 | ||
1720 | result = sta_info_start(local); | |
1721 | if (result < 0) | |
1722 | goto fail_sta_info; | |
1723 | ||
1724 | rtnl_lock(); | |
1725 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
1726 | if (result < 0) | |
1727 | goto fail_dev; | |
1728 | ||
1729 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
1730 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
1731 | ||
1732 | result = register_netdevice(local->mdev); | |
1733 | if (result < 0) | |
1734 | goto fail_dev; | |
1735 | ||
e9f207f0 | 1736 | ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
5b2812e9 | 1737 | ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP); |
e9f207f0 | 1738 | |
830f9038 JB |
1739 | result = ieee80211_init_rate_ctrl_alg(local, |
1740 | hw->rate_control_algorithm); | |
f0706e82 JB |
1741 | if (result < 0) { |
1742 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 1743 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1744 | goto fail_rate; |
1745 | } | |
1746 | ||
1747 | result = ieee80211_wep_init(local); | |
1748 | ||
1749 | if (result < 0) { | |
1750 | printk(KERN_DEBUG "%s: Failed to initialize wep\n", | |
dd1cd4c6 | 1751 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1752 | goto fail_wep; |
1753 | } | |
1754 | ||
1755 | ieee80211_install_qdisc(local->mdev); | |
1756 | ||
1757 | /* add one default STA interface */ | |
1758 | result = ieee80211_if_add(local->mdev, "wlan%d", NULL, | |
ee385855 | 1759 | IEEE80211_IF_TYPE_STA, NULL); |
f0706e82 JB |
1760 | if (result) |
1761 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
dd1cd4c6 | 1762 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1763 | |
1764 | local->reg_state = IEEE80211_DEV_REGISTERED; | |
1765 | rtnl_unlock(); | |
1766 | ||
1767 | ieee80211_led_init(local); | |
1768 | ||
1769 | return 0; | |
1770 | ||
1771 | fail_wep: | |
1772 | rate_control_deinitialize(local); | |
1773 | fail_rate: | |
e9f207f0 | 1774 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
f0706e82 | 1775 | unregister_netdevice(local->mdev); |
339a7c41 | 1776 | local->mdev = NULL; |
f0706e82 JB |
1777 | fail_dev: |
1778 | rtnl_unlock(); | |
1779 | sta_info_stop(local); | |
1780 | fail_sta_info: | |
e9f207f0 | 1781 | debugfs_hw_del(local); |
f0706e82 JB |
1782 | destroy_workqueue(local->hw.workqueue); |
1783 | fail_workqueue: | |
339a7c41 PE |
1784 | if (local->mdev != NULL) { |
1785 | ieee80211_if_free(local->mdev); | |
1786 | local->mdev = NULL; | |
1787 | } | |
96d51056 | 1788 | fail_mdev_alloc: |
f0706e82 JB |
1789 | wiphy_unregister(local->hw.wiphy); |
1790 | return result; | |
1791 | } | |
1792 | EXPORT_SYMBOL(ieee80211_register_hw); | |
1793 | ||
f0706e82 JB |
1794 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
1795 | { | |
1796 | struct ieee80211_local *local = hw_to_local(hw); | |
1797 | struct ieee80211_sub_if_data *sdata, *tmp; | |
f0706e82 JB |
1798 | |
1799 | tasklet_kill(&local->tx_pending_tasklet); | |
1800 | tasklet_kill(&local->tasklet); | |
1801 | ||
1802 | rtnl_lock(); | |
1803 | ||
1804 | BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); | |
1805 | ||
1806 | local->reg_state = IEEE80211_DEV_UNREGISTERED; | |
f0706e82 | 1807 | |
79010420 JB |
1808 | /* |
1809 | * At this point, interface list manipulations are fine | |
1810 | * because the driver cannot be handing us frames any | |
1811 | * more and the tasklet is killed. | |
1812 | */ | |
5b2812e9 JB |
1813 | |
1814 | /* | |
1815 | * First, we remove all non-master interfaces. Do this because they | |
1816 | * may have bss pointer dependency on the master, and when we free | |
1817 | * the master these would be freed as well, breaking our list | |
1818 | * iteration completely. | |
1819 | */ | |
1820 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { | |
1821 | if (sdata->dev == local->mdev) | |
1822 | continue; | |
1823 | list_del(&sdata->list); | |
f0706e82 | 1824 | __ieee80211_if_del(local, sdata); |
5b2812e9 JB |
1825 | } |
1826 | ||
1827 | /* then, finally, remove the master interface */ | |
1828 | __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev)); | |
f0706e82 JB |
1829 | |
1830 | rtnl_unlock(); | |
1831 | ||
f0706e82 JB |
1832 | ieee80211_rx_bss_list_deinit(local->mdev); |
1833 | ieee80211_clear_tx_pending(local); | |
1834 | sta_info_stop(local); | |
1835 | rate_control_deinitialize(local); | |
e9f207f0 | 1836 | debugfs_hw_del(local); |
f0706e82 | 1837 | |
f0706e82 JB |
1838 | if (skb_queue_len(&local->skb_queue) |
1839 | || skb_queue_len(&local->skb_queue_unreliable)) | |
1840 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 1841 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1842 | skb_queue_purge(&local->skb_queue); |
1843 | skb_queue_purge(&local->skb_queue_unreliable); | |
1844 | ||
1845 | destroy_workqueue(local->hw.workqueue); | |
1846 | wiphy_unregister(local->hw.wiphy); | |
1847 | ieee80211_wep_free(local); | |
1848 | ieee80211_led_exit(local); | |
96d51056 JB |
1849 | ieee80211_if_free(local->mdev); |
1850 | local->mdev = NULL; | |
f0706e82 JB |
1851 | } |
1852 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1853 | ||
1854 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1855 | { | |
1856 | struct ieee80211_local *local = hw_to_local(hw); | |
1857 | ||
f0706e82 JB |
1858 | wiphy_free(local->hw.wiphy); |
1859 | } | |
1860 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1861 | ||
f0706e82 JB |
1862 | static int __init ieee80211_init(void) |
1863 | { | |
1864 | struct sk_buff *skb; | |
1865 | int ret; | |
1866 | ||
e039fa4a JB |
1867 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1868 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
1869 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); | |
f0706e82 | 1870 | |
4b475898 | 1871 | ret = rc80211_pid_init(); |
ad018375 | 1872 | if (ret) |
d9357136 | 1873 | goto out; |
ac71c691 | 1874 | |
f0706e82 JB |
1875 | ret = ieee80211_wme_register(); |
1876 | if (ret) { | |
1877 | printk(KERN_DEBUG "ieee80211_init: failed to " | |
1878 | "initialize WME (err=%d)\n", ret); | |
3eadf5f4 | 1879 | goto out_cleanup_pid; |
f0706e82 JB |
1880 | } |
1881 | ||
e9f207f0 JB |
1882 | ieee80211_debugfs_netdev_init(); |
1883 | ||
f0706e82 | 1884 | return 0; |
ad018375 | 1885 | |
3eadf5f4 | 1886 | out_cleanup_pid: |
4b475898 | 1887 | rc80211_pid_exit(); |
3eadf5f4 | 1888 | out: |
ad018375 | 1889 | return ret; |
f0706e82 JB |
1890 | } |
1891 | ||
f0706e82 JB |
1892 | static void __exit ieee80211_exit(void) |
1893 | { | |
4b475898 | 1894 | rc80211_pid_exit(); |
ac71c691 | 1895 | |
3b96766f JB |
1896 | /* |
1897 | * For key todo, it'll be empty by now but the work | |
1898 | * might still be scheduled. | |
1899 | */ | |
1900 | flush_scheduled_work(); | |
1901 | ||
f7a92144 LCC |
1902 | if (mesh_allocated) |
1903 | ieee80211s_stop(); | |
902acc78 | 1904 | |
f0706e82 | 1905 | ieee80211_wme_unregister(); |
e9f207f0 | 1906 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1907 | } |
1908 | ||
1909 | ||
ca9938fe | 1910 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1911 | module_exit(ieee80211_exit); |
1912 | ||
1913 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1914 | MODULE_LICENSE("GPL"); |