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; | |
e6a9854b JB |
44 | u8 rate; |
45 | u8 padding_for_rate; | |
b306f453 JB |
46 | __le16 tx_flags; |
47 | u8 data_retries; | |
48 | } __attribute__ ((packed)); | |
49 | ||
f0706e82 | 50 | |
4150c572 | 51 | /* must be called under mdev tx lock */ |
0d143fe1 | 52 | void ieee80211_configure_filter(struct ieee80211_local *local) |
4150c572 JB |
53 | { |
54 | unsigned int changed_flags; | |
55 | unsigned int new_flags = 0; | |
56 | ||
53918994 | 57 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
58 | new_flags |= FIF_PROMISC_IN_BSS; |
59 | ||
53918994 | 60 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
61 | new_flags |= FIF_ALLMULTI; |
62 | ||
63 | if (local->monitors) | |
8cc9a739 MW |
64 | new_flags |= FIF_BCN_PRBRESP_PROMISC; |
65 | ||
66 | if (local->fif_fcsfail) | |
67 | new_flags |= FIF_FCSFAIL; | |
68 | ||
69 | if (local->fif_plcpfail) | |
70 | new_flags |= FIF_PLCPFAIL; | |
71 | ||
72 | if (local->fif_control) | |
73 | new_flags |= FIF_CONTROL; | |
74 | ||
75 | if (local->fif_other_bss) | |
76 | new_flags |= FIF_OTHER_BSS; | |
4150c572 JB |
77 | |
78 | changed_flags = local->filter_flags ^ new_flags; | |
79 | ||
80 | /* be a bit nasty */ | |
81 | new_flags |= (1<<31); | |
82 | ||
83 | local->ops->configure_filter(local_to_hw(local), | |
84 | changed_flags, &new_flags, | |
85 | local->mdev->mc_count, | |
86 | local->mdev->mc_list); | |
87 | ||
88 | WARN_ON(new_flags & (1<<31)); | |
89 | ||
90 | local->filter_flags = new_flags & ~(1<<31); | |
91 | } | |
92 | ||
b2c258fb | 93 | /* master interface */ |
f0706e82 | 94 | |
0d143fe1 JB |
95 | static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr) |
96 | { | |
97 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
98 | return ETH_ALEN; | |
99 | } | |
100 | ||
101 | static const struct header_ops ieee80211_header_ops = { | |
102 | .create = eth_header, | |
103 | .parse = header_parse_80211, | |
104 | .rebuild = eth_rebuild_header, | |
105 | .cache = eth_header_cache, | |
106 | .cache_update = eth_header_cache_update, | |
107 | }; | |
108 | ||
b2c258fb JB |
109 | static int ieee80211_master_open(struct net_device *dev) |
110 | { | |
133b8226 JB |
111 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
112 | struct ieee80211_local *local = mpriv->local; | |
b2c258fb JB |
113 | struct ieee80211_sub_if_data *sdata; |
114 | int res = -EOPNOTSUPP; | |
f0706e82 | 115 | |
79010420 JB |
116 | /* we hold the RTNL here so can safely walk the list */ |
117 | list_for_each_entry(sdata, &local->interfaces, list) { | |
3e122be0 | 118 | if (netif_running(sdata->dev)) { |
b2c258fb JB |
119 | res = 0; |
120 | break; | |
121 | } | |
122 | } | |
36d6825b JB |
123 | |
124 | if (res) | |
125 | return res; | |
126 | ||
51cb6db0 | 127 | netif_tx_start_all_queues(local->mdev); |
36d6825b JB |
128 | |
129 | return 0; | |
b2c258fb | 130 | } |
f0706e82 | 131 | |
b2c258fb | 132 | static int ieee80211_master_stop(struct net_device *dev) |
f0706e82 | 133 | { |
133b8226 JB |
134 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
135 | struct ieee80211_local *local = mpriv->local; | |
b2c258fb | 136 | struct ieee80211_sub_if_data *sdata; |
f0706e82 | 137 | |
79010420 JB |
138 | /* we hold the RTNL here so can safely walk the list */ |
139 | list_for_each_entry(sdata, &local->interfaces, list) | |
3e122be0 | 140 | if (netif_running(sdata->dev)) |
b2c258fb | 141 | dev_close(sdata->dev); |
f0706e82 | 142 | |
b2c258fb JB |
143 | return 0; |
144 | } | |
f0706e82 | 145 | |
4150c572 JB |
146 | static void ieee80211_master_set_multicast_list(struct net_device *dev) |
147 | { | |
133b8226 JB |
148 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
149 | struct ieee80211_local *local = mpriv->local; | |
4150c572 JB |
150 | |
151 | ieee80211_configure_filter(local); | |
152 | } | |
153 | ||
b2c258fb JB |
154 | /* everything else */ |
155 | ||
9d139c81 | 156 | int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) |
b2c258fb | 157 | { |
9d139c81 | 158 | struct ieee80211_local *local = sdata->local; |
b2c258fb | 159 | struct ieee80211_if_conf conf; |
b2c258fb | 160 | |
9d139c81 JB |
161 | if (WARN_ON(!netif_running(sdata->dev))) |
162 | return 0; | |
163 | ||
7a725f73 JB |
164 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
165 | return -EINVAL; | |
166 | ||
9d139c81 | 167 | if (!local->ops->config_interface) |
f0706e82 | 168 | return 0; |
f0706e82 | 169 | |
b2c258fb | 170 | memset(&conf, 0, sizeof(conf)); |
9d139c81 JB |
171 | conf.changed = changed; |
172 | ||
05c914fe JB |
173 | if (sdata->vif.type == NL80211_IFTYPE_STATION || |
174 | sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
4150c572 | 175 | conf.bssid = sdata->u.sta.bssid; |
b2c258fb JB |
176 | conf.ssid = sdata->u.sta.ssid; |
177 | conf.ssid_len = sdata->u.sta.ssid_len; | |
05c914fe | 178 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
9d139c81 | 179 | conf.bssid = sdata->dev->dev_addr; |
b2c258fb JB |
180 | conf.ssid = sdata->u.ap.ssid; |
181 | conf.ssid_len = sdata->u.ap.ssid_len; | |
9d139c81 JB |
182 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
183 | u8 zero[ETH_ALEN] = { 0 }; | |
184 | conf.bssid = zero; | |
185 | conf.ssid = zero; | |
186 | conf.ssid_len = 0; | |
187 | } else { | |
188 | WARN_ON(1); | |
189 | return -EINVAL; | |
f0706e82 | 190 | } |
f0706e82 | 191 | |
9d139c81 JB |
192 | if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID))) |
193 | return -EINVAL; | |
f0706e82 | 194 | |
9d139c81 JB |
195 | if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID))) |
196 | return -EINVAL; | |
f0706e82 | 197 | |
9d139c81 JB |
198 | return local->ops->config_interface(local_to_hw(local), |
199 | &sdata->vif, &conf); | |
b2c258fb | 200 | } |
f0706e82 | 201 | |
e8975581 | 202 | int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) |
b2c258fb | 203 | { |
b2c258fb JB |
204 | struct ieee80211_channel *chan; |
205 | int ret = 0; | |
e8975581 | 206 | int power; |
f0706e82 | 207 | |
cb121bad JB |
208 | might_sleep(); |
209 | ||
c2b13452 | 210 | if (local->sw_scanning) |
b2c258fb | 211 | chan = local->scan_channel; |
8318d78a | 212 | else |
b2c258fb | 213 | chan = local->oper_channel; |
f0706e82 | 214 | |
e8975581 JB |
215 | if (chan != local->hw.conf.channel) { |
216 | local->hw.conf.channel = chan; | |
217 | changed |= IEEE80211_CONF_CHANGE_CHANNEL; | |
218 | } | |
219 | ||
8318d78a JB |
220 | |
221 | if (!local->hw.conf.power_level) | |
e8975581 | 222 | power = chan->max_power; |
8318d78a | 223 | else |
e8975581 JB |
224 | power = min(chan->max_power, local->hw.conf.power_level); |
225 | if (local->hw.conf.power_level != power) { | |
226 | changed |= IEEE80211_CONF_CHANGE_POWER; | |
227 | local->hw.conf.power_level = power; | |
228 | } | |
b2c258fb | 229 | |
e8975581 JB |
230 | if (changed && local->open_count) { |
231 | ret = local->ops->config(local_to_hw(local), changed); | |
d73782fd JB |
232 | /* |
233 | * HW reconfiguration should never fail, the driver has told | |
234 | * us what it can support so it should live up to that promise. | |
235 | */ | |
236 | WARN_ON(ret); | |
237 | } | |
f0706e82 | 238 | |
b2c258fb JB |
239 | return ret; |
240 | } | |
f0706e82 | 241 | |
471b3efd JB |
242 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
243 | u32 changed) | |
d9430a32 | 244 | { |
471b3efd JB |
245 | struct ieee80211_local *local = sdata->local; |
246 | ||
7a725f73 JB |
247 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
248 | return; | |
249 | ||
471b3efd JB |
250 | if (!changed) |
251 | return; | |
252 | ||
253 | if (local->ops->bss_info_changed) | |
254 | local->ops->bss_info_changed(local_to_hw(local), | |
255 | &sdata->vif, | |
bda3933a | 256 | &sdata->vif.bss_conf, |
471b3efd | 257 | changed); |
d9430a32 DD |
258 | } |
259 | ||
f698d856 | 260 | u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
d9430a32 | 261 | { |
bda3933a JB |
262 | sdata->vif.bss_conf.use_cts_prot = false; |
263 | sdata->vif.bss_conf.use_short_preamble = false; | |
264 | sdata->vif.bss_conf.use_short_slot = false; | |
7a5158ef JB |
265 | return BSS_CHANGED_ERP_CTS_PROT | |
266 | BSS_CHANGED_ERP_PREAMBLE | | |
267 | BSS_CHANGED_ERP_SLOT; | |
d9430a32 DD |
268 | } |
269 | ||
f0706e82 | 270 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 271 | struct sk_buff *skb) |
f0706e82 JB |
272 | { |
273 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 274 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
275 | int tmp; |
276 | ||
277 | skb->dev = local->mdev; | |
f0706e82 | 278 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 279 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
280 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
281 | tmp = skb_queue_len(&local->skb_queue) + | |
282 | skb_queue_len(&local->skb_queue_unreliable); | |
283 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
284 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
285 | dev_kfree_skb_irq(skb); |
286 | tmp--; | |
287 | I802_DEBUG_INC(local->tx_status_drop); | |
288 | } | |
289 | tasklet_schedule(&local->tasklet); | |
290 | } | |
291 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
292 | ||
293 | static void ieee80211_tasklet_handler(unsigned long data) | |
294 | { | |
295 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
296 | struct sk_buff *skb; | |
297 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 298 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
299 | |
300 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
301 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
302 | switch (skb->pkt_type) { | |
303 | case IEEE80211_RX_MSG: | |
304 | /* status is in skb->cb */ | |
305 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 306 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
307 | * netstack. */ |
308 | skb->pkt_type = 0; | |
309 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
310 | break; | |
311 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 312 | skb->pkt_type = 0; |
e039fa4a | 313 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 314 | break; |
eadc8d9e RR |
315 | case IEEE80211_DELBA_MSG: |
316 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
317 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
318 | ra_tid->ra, ra_tid->tid); | |
319 | dev_kfree_skb(skb); | |
320 | break; | |
321 | case IEEE80211_ADDBA_MSG: | |
322 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
323 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
324 | ra_tid->ra, ra_tid->tid); | |
325 | dev_kfree_skb(skb); | |
326 | break ; | |
f4ea83dd JB |
327 | default: |
328 | WARN_ON(1); | |
f0706e82 JB |
329 | dev_kfree_skb(skb); |
330 | break; | |
331 | } | |
332 | } | |
333 | } | |
334 | ||
f0706e82 JB |
335 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
336 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
337 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
d0f09804 | 338 | */ |
f0706e82 JB |
339 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, |
340 | struct ieee80211_key *key, | |
e039fa4a | 341 | struct sk_buff *skb) |
f0706e82 | 342 | { |
62bf1d76 HH |
343 | unsigned int hdrlen, iv_len, mic_len; |
344 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
f0706e82 | 345 | |
62bf1d76 | 346 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
f0706e82 JB |
347 | |
348 | if (!key) | |
349 | goto no_key; | |
350 | ||
8f20fc24 | 351 | switch (key->conf.alg) { |
f0706e82 JB |
352 | case ALG_WEP: |
353 | iv_len = WEP_IV_LEN; | |
354 | mic_len = WEP_ICV_LEN; | |
355 | break; | |
356 | case ALG_TKIP: | |
357 | iv_len = TKIP_IV_LEN; | |
358 | mic_len = TKIP_ICV_LEN; | |
359 | break; | |
360 | case ALG_CCMP: | |
361 | iv_len = CCMP_HDR_LEN; | |
362 | mic_len = CCMP_MIC_LEN; | |
363 | break; | |
364 | default: | |
365 | goto no_key; | |
366 | } | |
367 | ||
62bf1d76 | 368 | if (skb->len >= hdrlen + mic_len && |
11a843b7 | 369 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 | 370 | skb_trim(skb, skb->len - mic_len); |
62bf1d76 | 371 | if (skb->len >= hdrlen + iv_len) { |
f0706e82 | 372 | memmove(skb->data + iv_len, skb->data, hdrlen); |
62bf1d76 | 373 | hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len); |
f0706e82 JB |
374 | } |
375 | ||
376 | no_key: | |
62bf1d76 HH |
377 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
378 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
379 | memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, | |
380 | hdrlen - IEEE80211_QOS_CTL_LEN); | |
381 | skb_pull(skb, IEEE80211_QOS_CTL_LEN); | |
f0706e82 JB |
382 | } |
383 | } | |
384 | ||
d46e144b JB |
385 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
386 | struct sta_info *sta, | |
e039fa4a | 387 | struct sk_buff *skb) |
d46e144b JB |
388 | { |
389 | sta->tx_filtered_count++; | |
390 | ||
391 | /* | |
392 | * Clear the TX filter mask for this STA when sending the next | |
393 | * packet. If the STA went to power save mode, this will happen | |
f6d97104 | 394 | * when it wakes up for the next time. |
d46e144b | 395 | */ |
07346f81 | 396 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
397 | |
398 | /* | |
399 | * This code races in the following way: | |
400 | * | |
401 | * (1) STA sends frame indicating it will go to sleep and does so | |
402 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
403 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
404 | * (4) we get TX status before having processed the frame and | |
405 | * knowing that the STA has gone to sleep. | |
406 | * | |
407 | * This is actually quite unlikely even when both those events are | |
408 | * processed from interrupts coming in quickly after one another or | |
409 | * even at the same time because we queue both TX status events and | |
410 | * RX frames to be processed by a tasklet and process them in the | |
411 | * same order that they were received or TX status last. Hence, there | |
412 | * is no race as long as the frame RX is processed before the next TX | |
413 | * status, which drivers can ensure, see below. | |
414 | * | |
415 | * Note that this can only happen if the hardware or firmware can | |
416 | * actually add STAs to the filter list, if this is done by the | |
417 | * driver in response to set_tim() (which will only reduce the race | |
418 | * this whole filtering tries to solve, not completely solve it) | |
419 | * this situation cannot happen. | |
420 | * | |
421 | * To completely solve this race drivers need to make sure that they | |
422 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
423 | * functions and | |
424 | * (b) always process RX events before TX status events if ordering | |
425 | * can be unknown, for example with different interrupt status | |
426 | * bits. | |
427 | */ | |
07346f81 | 428 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 429 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 430 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
431 | skb_queue_tail(&sta->tx_filtered, skb); |
432 | return; | |
433 | } | |
434 | ||
8b30b1fe | 435 | if (!test_sta_flags(sta, WLAN_STA_PS) && !skb->requeue) { |
d46e144b | 436 | /* Software retry the packet once */ |
8b30b1fe | 437 | skb->requeue = 1; |
e039fa4a | 438 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
439 | dev_queue_xmit(skb); |
440 | return; | |
441 | } | |
442 | ||
f4ea83dd | 443 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
d46e144b JB |
444 | if (net_ratelimit()) |
445 | printk(KERN_DEBUG "%s: dropped TX filtered frame, " | |
446 | "queue_len=%d PS=%d @%lu\n", | |
447 | wiphy_name(local->hw.wiphy), | |
448 | skb_queue_len(&sta->tx_filtered), | |
07346f81 | 449 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
f4ea83dd | 450 | #endif |
d46e144b JB |
451 | dev_kfree_skb(skb); |
452 | } | |
453 | ||
e039fa4a | 454 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
455 | { |
456 | struct sk_buff *skb2; | |
457 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
458 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 459 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 460 | u16 frag, type; |
429a3805 | 461 | __le16 fc; |
4b7679a5 | 462 | struct ieee80211_supported_band *sband; |
b306f453 JB |
463 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
464 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 465 | struct net_device *prev_dev = NULL; |
429a3805 | 466 | struct sta_info *sta; |
e6a9854b JB |
467 | int retry_count = -1, i; |
468 | ||
469 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
470 | /* the HW cannot have attempted that rate */ | |
471 | if (i >= hw->max_rates) { | |
472 | info->status.rates[i].idx = -1; | |
473 | info->status.rates[i].count = 0; | |
474 | } | |
475 | ||
476 | retry_count += info->status.rates[i].count; | |
477 | } | |
478 | if (retry_count < 0) | |
479 | retry_count = 0; | |
f0706e82 | 480 | |
d0709a65 JB |
481 | rcu_read_lock(); |
482 | ||
e6a9854b JB |
483 | sband = local->hw.wiphy->bands[info->band]; |
484 | ||
95dac040 JB |
485 | sta = sta_info_get(local, hdr->addr1); |
486 | ||
487 | if (sta) { | |
e6a9854b | 488 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
95dac040 JB |
489 | test_sta_flags(sta, WLAN_STA_PS)) { |
490 | /* | |
491 | * The STA is in power save mode, so assume | |
492 | * that this TX packet failed because of that. | |
493 | */ | |
494 | ieee80211_handle_filtered_frame(local, sta, skb); | |
495 | rcu_read_unlock(); | |
496 | return; | |
f0706e82 | 497 | } |
f0706e82 | 498 | |
95dac040 JB |
499 | fc = hdr->frame_control; |
500 | ||
501 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && | |
502 | (ieee80211_is_data_qos(fc))) { | |
503 | u16 tid, ssn; | |
504 | u8 *qc; | |
429a3805 | 505 | |
429a3805 RR |
506 | qc = ieee80211_get_qos_ctl(hdr); |
507 | tid = qc[0] & 0xf; | |
508 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
509 | & IEEE80211_SCTL_SEQ); | |
f698d856 | 510 | ieee80211_send_bar(sta->sdata, hdr->addr1, |
429a3805 RR |
511 | tid, ssn); |
512 | } | |
429a3805 | 513 | |
95dac040 | 514 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
e039fa4a | 515 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 516 | rcu_read_unlock(); |
f0706e82 | 517 | return; |
95dac040 | 518 | } else { |
e6a9854b | 519 | if (!(info->flags & IEEE80211_TX_STAT_ACK)) |
95dac040 | 520 | sta->tx_retry_failed++; |
e6a9854b | 521 | sta->tx_retry_count += retry_count; |
f0706e82 | 522 | } |
95dac040 | 523 | |
4b7679a5 | 524 | rate_control_tx_status(local, sband, sta, skb); |
95dac040 | 525 | } |
f0706e82 | 526 | |
d0709a65 JB |
527 | rcu_read_unlock(); |
528 | ||
f0706e82 JB |
529 | ieee80211_led_tx(local, 0); |
530 | ||
531 | /* SNMP counters | |
532 | * Fragments are passed to low-level drivers as separate skbs, so these | |
533 | * are actually fragments, not frames. Update frame counters only for | |
534 | * the first fragment of the frame. */ | |
535 | ||
536 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
537 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
538 | ||
e039fa4a | 539 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
540 | if (frag == 0) { |
541 | local->dot11TransmittedFrameCount++; | |
542 | if (is_multicast_ether_addr(hdr->addr1)) | |
543 | local->dot11MulticastTransmittedFrameCount++; | |
e6a9854b | 544 | if (retry_count > 0) |
f0706e82 | 545 | local->dot11RetryCount++; |
e6a9854b | 546 | if (retry_count > 1) |
f0706e82 JB |
547 | local->dot11MultipleRetryCount++; |
548 | } | |
549 | ||
550 | /* This counter shall be incremented for an acknowledged MPDU | |
551 | * with an individual address in the address 1 field or an MPDU | |
552 | * with a multicast address in the address 1 field of type Data | |
553 | * or Management. */ | |
554 | if (!is_multicast_ether_addr(hdr->addr1) || | |
555 | type == IEEE80211_FTYPE_DATA || | |
556 | type == IEEE80211_FTYPE_MGMT) | |
557 | local->dot11TransmittedFragmentCount++; | |
558 | } else { | |
559 | if (frag == 0) | |
560 | local->dot11FailedCount++; | |
561 | } | |
562 | ||
b306f453 JB |
563 | /* this was a transmitted frame, but now we want to reuse it */ |
564 | skb_orphan(skb); | |
565 | ||
3d30d949 MW |
566 | /* |
567 | * This is a bit racy but we can avoid a lot of work | |
568 | * with this test... | |
569 | */ | |
570 | if (!local->monitors && !local->cooked_mntrs) { | |
f0706e82 JB |
571 | dev_kfree_skb(skb); |
572 | return; | |
573 | } | |
574 | ||
b306f453 | 575 | /* send frame to monitor interfaces now */ |
f0706e82 | 576 | |
b306f453 JB |
577 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
578 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
579 | dev_kfree_skb(skb); |
580 | return; | |
581 | } | |
f0706e82 | 582 | |
988c0f72 | 583 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
584 | skb_push(skb, sizeof(*rthdr)); |
585 | ||
586 | memset(rthdr, 0, sizeof(*rthdr)); | |
587 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
588 | rthdr->hdr.it_present = | |
589 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
e6a9854b JB |
590 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES) | |
591 | (1 << IEEE80211_RADIOTAP_RATE)); | |
b306f453 | 592 | |
e039fa4a | 593 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
594 | !is_multicast_ether_addr(hdr->addr1)) |
595 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
596 | ||
e6a9854b JB |
597 | /* |
598 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
599 | * extensions proposal contains, we can actually report | |
600 | * the whole set of tries we did. | |
601 | */ | |
602 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || | |
603 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) | |
b306f453 | 604 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e6a9854b | 605 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b306f453 | 606 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
e6a9854b JB |
607 | if (info->status.rates[0].idx >= 0 && |
608 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) | |
609 | rthdr->rate = sband->bitrates[ | |
610 | info->status.rates[0].idx].bitrate / 5; | |
b306f453 | 611 | |
e6a9854b JB |
612 | /* for now report the total retry_count */ |
613 | rthdr->data_retries = retry_count; | |
b306f453 | 614 | |
3d30d949 MW |
615 | /* XXX: is this sufficient for BPF? */ |
616 | skb_set_mac_header(skb, 0); | |
617 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
618 | skb->pkt_type = PACKET_OTHERHOST; | |
619 | skb->protocol = htons(ETH_P_802_2); | |
620 | memset(skb->cb, 0, sizeof(skb->cb)); | |
621 | ||
79010420 | 622 | rcu_read_lock(); |
79010420 | 623 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
05c914fe | 624 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
b306f453 JB |
625 | if (!netif_running(sdata->dev)) |
626 | continue; | |
3d30d949 MW |
627 | |
628 | if (prev_dev) { | |
79010420 | 629 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
630 | if (skb2) { |
631 | skb2->dev = prev_dev; | |
632 | netif_rx(skb2); | |
633 | } | |
634 | } | |
635 | ||
636 | prev_dev = sdata->dev; | |
b306f453 JB |
637 | } |
638 | } | |
3d30d949 MW |
639 | if (prev_dev) { |
640 | skb->dev = prev_dev; | |
641 | netif_rx(skb); | |
642 | skb = NULL; | |
643 | } | |
79010420 | 644 | rcu_read_unlock(); |
3d30d949 | 645 | dev_kfree_skb(skb); |
f0706e82 JB |
646 | } |
647 | EXPORT_SYMBOL(ieee80211_tx_status); | |
648 | ||
f0706e82 JB |
649 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
650 | const struct ieee80211_ops *ops) | |
651 | { | |
f0706e82 | 652 | struct ieee80211_local *local; |
f0706e82 JB |
653 | int priv_size; |
654 | struct wiphy *wiphy; | |
655 | ||
656 | /* Ensure 32-byte alignment of our private data and hw private data. | |
657 | * We use the wiphy priv data for both our ieee80211_local and for | |
658 | * the driver's private data | |
659 | * | |
660 | * In memory it'll be like this: | |
661 | * | |
662 | * +-------------------------+ | |
663 | * | struct wiphy | | |
664 | * +-------------------------+ | |
665 | * | struct ieee80211_local | | |
666 | * +-------------------------+ | |
667 | * | driver's private data | | |
668 | * +-------------------------+ | |
669 | * | |
670 | */ | |
671 | priv_size = ((sizeof(struct ieee80211_local) + | |
672 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
673 | priv_data_len; | |
674 | ||
675 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
676 | ||
677 | if (!wiphy) | |
678 | return NULL; | |
679 | ||
680 | wiphy->privid = mac80211_wiphy_privid; | |
681 | ||
682 | local = wiphy_priv(wiphy); | |
683 | local->hw.wiphy = wiphy; | |
684 | ||
685 | local->hw.priv = (char *)local + | |
686 | ((sizeof(struct ieee80211_local) + | |
687 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
688 | ||
4480f15c | 689 | BUG_ON(!ops->tx); |
4150c572 JB |
690 | BUG_ON(!ops->start); |
691 | BUG_ON(!ops->stop); | |
4480f15c JB |
692 | BUG_ON(!ops->config); |
693 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
694 | BUG_ON(!ops->remove_interface); |
695 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
696 | local->ops = ops; |
697 | ||
e6a9854b JB |
698 | /* set up some defaults */ |
699 | local->hw.queues = 1; | |
700 | local->hw.max_rates = 1; | |
f0706e82 JB |
701 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; |
702 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
9124b077 JB |
703 | local->hw.conf.long_frame_max_tx_count = 4; |
704 | local->hw.conf.short_frame_max_tx_count = 7; | |
e8975581 | 705 | local->hw.conf.radio_enabled = true; |
f0706e82 | 706 | |
79010420 | 707 | INIT_LIST_HEAD(&local->interfaces); |
f0706e82 | 708 | |
b16bd15c JB |
709 | spin_lock_init(&local->key_lock); |
710 | ||
c2b13452 | 711 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
f0706e82 JB |
712 | |
713 | sta_info_init(local); | |
714 | ||
f0706e82 JB |
715 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
716 | (unsigned long)local); | |
717 | tasklet_disable(&local->tx_pending_tasklet); | |
718 | ||
719 | tasklet_init(&local->tasklet, | |
720 | ieee80211_tasklet_handler, | |
721 | (unsigned long) local); | |
722 | tasklet_disable(&local->tasklet); | |
723 | ||
724 | skb_queue_head_init(&local->skb_queue); | |
725 | skb_queue_head_init(&local->skb_queue_unreliable); | |
726 | ||
727 | return local_to_hw(local); | |
728 | } | |
729 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
730 | ||
731 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
732 | { | |
733 | struct ieee80211_local *local = hw_to_local(hw); | |
734 | const char *name; | |
735 | int result; | |
8318d78a | 736 | enum ieee80211_band band; |
96d51056 | 737 | struct net_device *mdev; |
133b8226 | 738 | struct ieee80211_master_priv *mpriv; |
8318d78a JB |
739 | |
740 | /* | |
741 | * generic code guarantees at least one band, | |
742 | * set this very early because much code assumes | |
743 | * that hw.conf.channel is assigned | |
744 | */ | |
745 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
746 | struct ieee80211_supported_band *sband; | |
747 | ||
748 | sband = local->hw.wiphy->bands[band]; | |
749 | if (sband) { | |
750 | /* init channel we're on */ | |
751 | local->hw.conf.channel = | |
752 | local->oper_channel = | |
753 | local->scan_channel = &sband->channels[0]; | |
754 | break; | |
755 | } | |
756 | } | |
f0706e82 | 757 | |
f59ac048 LR |
758 | /* if low-level driver supports AP, we also support VLAN */ |
759 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) | |
760 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
761 | ||
762 | /* mac80211 always supports monitor */ | |
763 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); | |
764 | ||
f0706e82 JB |
765 | result = wiphy_register(local->hw.wiphy); |
766 | if (result < 0) | |
767 | return result; | |
768 | ||
e2530083 JB |
769 | /* |
770 | * We use the number of queues for feature tests (QoS, HT) internally | |
771 | * so restrict them appropriately. | |
772 | */ | |
e2530083 JB |
773 | if (hw->queues > IEEE80211_MAX_QUEUES) |
774 | hw->queues = IEEE80211_MAX_QUEUES; | |
775 | if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) | |
776 | hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; | |
777 | if (hw->queues < 4) | |
778 | hw->ampdu_queues = 0; | |
e2530083 | 779 | |
133b8226 | 780 | mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv), |
e2530083 JB |
781 | "wmaster%d", ether_setup, |
782 | ieee80211_num_queues(hw)); | |
96d51056 JB |
783 | if (!mdev) |
784 | goto fail_mdev_alloc; | |
785 | ||
133b8226 JB |
786 | mpriv = netdev_priv(mdev); |
787 | mpriv->local = local; | |
96d51056 JB |
788 | local->mdev = mdev; |
789 | ||
3e122be0 | 790 | ieee80211_rx_bss_list_init(local); |
96d51056 JB |
791 | |
792 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
793 | mdev->open = ieee80211_master_open; | |
794 | mdev->stop = ieee80211_master_stop; | |
795 | mdev->type = ARPHRD_IEEE80211; | |
796 | mdev->header_ops = &ieee80211_header_ops; | |
797 | mdev->set_multicast_list = ieee80211_master_set_multicast_list; | |
798 | ||
f0706e82 | 799 | name = wiphy_dev(local->hw.wiphy)->driver->name; |
59959a61 | 800 | local->hw.workqueue = create_freezeable_workqueue(name); |
f0706e82 JB |
801 | if (!local->hw.workqueue) { |
802 | result = -ENOMEM; | |
803 | goto fail_workqueue; | |
804 | } | |
805 | ||
b306f453 JB |
806 | /* |
807 | * The hardware needs headroom for sending the frame, | |
808 | * and we need some headroom for passing the frame to monitor | |
809 | * interfaces, but never both at the same time. | |
810 | */ | |
33ccad35 JB |
811 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
812 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 813 | |
e9f207f0 JB |
814 | debugfs_hw_add(local); |
815 | ||
dc0ae30c TW |
816 | if (local->hw.conf.beacon_int < 10) |
817 | local->hw.conf.beacon_int = 100; | |
f0706e82 | 818 | |
ea95bba4 TW |
819 | if (local->hw.max_listen_interval == 0) |
820 | local->hw.max_listen_interval = 1; | |
821 | ||
822 | local->hw.conf.listen_interval = local->hw.max_listen_interval; | |
823 | ||
566bfe5a BR |
824 | local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | |
825 | IEEE80211_HW_SIGNAL_DB | | |
826 | IEEE80211_HW_SIGNAL_DBM) ? | |
f0706e82 | 827 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; |
566bfe5a | 828 | local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? |
f0706e82 | 829 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; |
566bfe5a | 830 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
f0706e82 JB |
831 | local->wstats_flags |= IW_QUAL_DBM; |
832 | ||
833 | result = sta_info_start(local); | |
834 | if (result < 0) | |
835 | goto fail_sta_info; | |
836 | ||
837 | rtnl_lock(); | |
838 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
839 | if (result < 0) | |
840 | goto fail_dev; | |
841 | ||
842 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
843 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
844 | ||
845 | result = register_netdevice(local->mdev); | |
846 | if (result < 0) | |
847 | goto fail_dev; | |
848 | ||
830f9038 JB |
849 | result = ieee80211_init_rate_ctrl_alg(local, |
850 | hw->rate_control_algorithm); | |
f0706e82 JB |
851 | if (result < 0) { |
852 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 853 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
854 | goto fail_rate; |
855 | } | |
856 | ||
857 | result = ieee80211_wep_init(local); | |
858 | ||
859 | if (result < 0) { | |
023a04be JF |
860 | printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", |
861 | wiphy_name(local->hw.wiphy), result); | |
f0706e82 JB |
862 | goto fail_wep; |
863 | } | |
864 | ||
51cb6db0 | 865 | local->mdev->select_queue = ieee80211_select_queue; |
f0706e82 JB |
866 | |
867 | /* add one default STA interface */ | |
3e122be0 | 868 | result = ieee80211_if_add(local, "wlan%d", NULL, |
05c914fe | 869 | NL80211_IFTYPE_STATION, NULL); |
f0706e82 JB |
870 | if (result) |
871 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
dd1cd4c6 | 872 | wiphy_name(local->hw.wiphy)); |
f0706e82 | 873 | |
f0706e82 JB |
874 | rtnl_unlock(); |
875 | ||
876 | ieee80211_led_init(local); | |
877 | ||
878 | return 0; | |
879 | ||
880 | fail_wep: | |
881 | rate_control_deinitialize(local); | |
882 | fail_rate: | |
883 | unregister_netdevice(local->mdev); | |
339a7c41 | 884 | local->mdev = NULL; |
f0706e82 JB |
885 | fail_dev: |
886 | rtnl_unlock(); | |
887 | sta_info_stop(local); | |
888 | fail_sta_info: | |
e9f207f0 | 889 | debugfs_hw_del(local); |
f0706e82 JB |
890 | destroy_workqueue(local->hw.workqueue); |
891 | fail_workqueue: | |
3e122be0 JB |
892 | if (local->mdev) |
893 | free_netdev(local->mdev); | |
96d51056 | 894 | fail_mdev_alloc: |
f0706e82 JB |
895 | wiphy_unregister(local->hw.wiphy); |
896 | return result; | |
897 | } | |
898 | EXPORT_SYMBOL(ieee80211_register_hw); | |
899 | ||
f0706e82 JB |
900 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
901 | { | |
902 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 JB |
903 | |
904 | tasklet_kill(&local->tx_pending_tasklet); | |
905 | tasklet_kill(&local->tasklet); | |
906 | ||
907 | rtnl_lock(); | |
908 | ||
79010420 JB |
909 | /* |
910 | * At this point, interface list manipulations are fine | |
911 | * because the driver cannot be handing us frames any | |
912 | * more and the tasklet is killed. | |
913 | */ | |
5b2812e9 | 914 | |
75636525 JB |
915 | /* First, we remove all virtual interfaces. */ |
916 | ieee80211_remove_interfaces(local); | |
5b2812e9 JB |
917 | |
918 | /* then, finally, remove the master interface */ | |
3e122be0 | 919 | unregister_netdevice(local->mdev); |
f0706e82 JB |
920 | |
921 | rtnl_unlock(); | |
922 | ||
3e122be0 | 923 | ieee80211_rx_bss_list_deinit(local); |
f0706e82 JB |
924 | ieee80211_clear_tx_pending(local); |
925 | sta_info_stop(local); | |
926 | rate_control_deinitialize(local); | |
e9f207f0 | 927 | debugfs_hw_del(local); |
f0706e82 | 928 | |
f0706e82 JB |
929 | if (skb_queue_len(&local->skb_queue) |
930 | || skb_queue_len(&local->skb_queue_unreliable)) | |
931 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 932 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
933 | skb_queue_purge(&local->skb_queue); |
934 | skb_queue_purge(&local->skb_queue_unreliable); | |
935 | ||
936 | destroy_workqueue(local->hw.workqueue); | |
937 | wiphy_unregister(local->hw.wiphy); | |
938 | ieee80211_wep_free(local); | |
939 | ieee80211_led_exit(local); | |
3e122be0 | 940 | free_netdev(local->mdev); |
f0706e82 JB |
941 | } |
942 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
943 | ||
944 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
945 | { | |
946 | struct ieee80211_local *local = hw_to_local(hw); | |
947 | ||
f0706e82 JB |
948 | wiphy_free(local->hw.wiphy); |
949 | } | |
950 | EXPORT_SYMBOL(ieee80211_free_hw); | |
951 | ||
f0706e82 JB |
952 | static int __init ieee80211_init(void) |
953 | { | |
954 | struct sk_buff *skb; | |
955 | int ret; | |
956 | ||
e039fa4a JB |
957 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
958 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
c6a1fa12 | 959 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); |
f0706e82 | 960 | |
cccf129f FF |
961 | ret = rc80211_minstrel_init(); |
962 | if (ret) | |
963 | return ret; | |
964 | ||
4b475898 | 965 | ret = rc80211_pid_init(); |
ad018375 | 966 | if (ret) |
51cb6db0 | 967 | return ret; |
f0706e82 | 968 | |
e9f207f0 JB |
969 | ieee80211_debugfs_netdev_init(); |
970 | ||
f0706e82 JB |
971 | return 0; |
972 | } | |
973 | ||
f0706e82 JB |
974 | static void __exit ieee80211_exit(void) |
975 | { | |
4b475898 | 976 | rc80211_pid_exit(); |
cccf129f | 977 | rc80211_minstrel_exit(); |
ac71c691 | 978 | |
3b96766f JB |
979 | /* |
980 | * For key todo, it'll be empty by now but the work | |
981 | * might still be scheduled. | |
982 | */ | |
983 | flush_scheduled_work(); | |
984 | ||
f7a92144 LCC |
985 | if (mesh_allocated) |
986 | ieee80211s_stop(); | |
902acc78 | 987 | |
e9f207f0 | 988 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
989 | } |
990 | ||
991 | ||
ca9938fe | 992 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
993 | module_exit(ieee80211_exit); |
994 | ||
995 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
996 | MODULE_LICENSE("GPL"); |