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mac80211: add HT IEs to mesh frames
[linux-block.git] / net / mac80211 / work.c
CommitLineData
af6b6374
JB		 1/*
2 * mac80211 work implementation
3 *
4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
5 * Copyright 2004, Instant802 Networks, Inc.
6 * Copyright 2005, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2009, Johannes Berg <johannes@sipsolutions.net>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16#include <linux/delay.h>
17#include <linux/if_ether.h>
18#include <linux/skbuff.h>
19#include <linux/if_arp.h>
20#include <linux/etherdevice.h>
21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
af6b6374
JB		 23#include <net/mac80211.h>
24#include <asm/unaligned.h>
25
26#include "ieee80211_i.h"
27#include "rate.h"
b2abb6e2 28#include "driver-ops.h"
af6b6374
JB		 29
30#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31#define IEEE80211_AUTH_MAX_TRIES 3
32#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33#define IEEE80211_ASSOC_MAX_TRIES 3
af6b6374
JB		 34
35enum work_action {
b8d92c9c 36 WORK_ACT_MISMATCH,
af6b6374
JB		 37 WORK_ACT_NONE,
38 WORK_ACT_TIMEOUT,
39 WORK_ACT_DONE,
40};
41
42
43/* utils */
44static inline void ASSERT_WORK_MTX(struct ieee80211_local *local)
45{
a1699b75 46 lockdep_assert_held(&local->mtx);
af6b6374
JB		 47}
48
49/*
50 * We can have multiple work items (and connection probing)
51 * scheduling this timer, but we need to take care to only
52 * reschedule it when it should fire _earlier_ than it was
53 * asked for before, or if it's not pending right now. This
54 * function ensures that. Note that it then is required to
55 * run this function for all timeouts after the first one
56 * has happened -- the work that runs from this timer will
57 * do that.
58 */
59static void run_again(struct ieee80211_local *local,
60 unsigned long timeout)
61{
62 ASSERT_WORK_MTX(local);
63
64 if (!timer_pending(&local->work_timer) ||
65 time_before(timeout, local->work_timer.expires))
66 mod_timer(&local->work_timer, timeout);
67}
68
af6b6374
JB		 69void free_work(struct ieee80211_work *wk)
70{
a74ce142 71 kfree_rcu(wk, rcu_head);
af6b6374
JB		 72}
73
74static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
75 struct ieee80211_supported_band *sband,
76 u32 *rates)
77{
78 int i, j, count;
79 *rates = 0;
80 count = 0;
81 for (i = 0; i < supp_rates_len; i++) {
82 int rate = (supp_rates[i] & 0x7F) * 5;
83
84 for (j = 0; j < sband->n_bitrates; j++)
85 if (sband->bitrates[j].bitrate == rate) {
86 *rates |= BIT(j);
87 count++;
88 break;
89 }
90 }
91
92 return count;
93}
94
95/* frame sending functions */
96
77c8144a
JB		 97static void ieee80211_add_ht_ie(struct sk_buff *skb, const u8 *ht_info_ie,
98 struct ieee80211_supported_band *sband,
99 struct ieee80211_channel *channel,
100 enum ieee80211_smps_mode smps)
101{
102 struct ieee80211_ht_info *ht_info;
103 u8 *pos;
104 u32 flags = channel->flags;
105 u16 cap = sband->ht_cap.cap;
77c8144a
JB		 106
107 if (!sband->ht_cap.ht_supported)
108 return;
109
110 if (!ht_info_ie)
111 return;
112
113 if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
114 return;
115
116 ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
117
118 /* determine capability flags */
119
77c8144a
JB		 120 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
121 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
122 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
123 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
124 cap &= ~IEEE80211_HT_CAP_SGI_40;
125 }
126 break;
127 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
128 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
129 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
130 cap &= ~IEEE80211_HT_CAP_SGI_40;
131 }
132 break;
133 }
134
135 /* set SM PS mode properly */
136 cap &= ~IEEE80211_HT_CAP_SM_PS;
137 switch (smps) {
138 case IEEE80211_SMPS_AUTOMATIC:
139 case IEEE80211_SMPS_NUM_MODES:
140 WARN_ON(1);
141 case IEEE80211_SMPS_OFF:
142 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
143 IEEE80211_HT_CAP_SM_PS_SHIFT;
144 break;
145 case IEEE80211_SMPS_STATIC:
146 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
147 IEEE80211_HT_CAP_SM_PS_SHIFT;
148 break;
149 case IEEE80211_SMPS_DYNAMIC:
150 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
151 IEEE80211_HT_CAP_SM_PS_SHIFT;
152 break;
153 }
154
155 /* reserve and fill IE */
77c8144a 156 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
42e7aa77 157 ieee80211_ie_build_ht_cap(pos, sband, cap);
77c8144a
JB		 158}
159
af6b6374
JB		 160static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
161 struct ieee80211_work *wk)
162{
163 struct ieee80211_local *local = sdata->local;
164 struct sk_buff *skb;
165 struct ieee80211_mgmt *mgmt;
ab13315a 166 u8 *pos, qos_info;
8e664fb3 167 size_t offset = 0, noffset;
0915cba3 168 int i, count, rates_len, supp_rates_len;
af6b6374
JB		 169 u16 capab;
170 struct ieee80211_supported_band *sband;
171 u32 rates = 0;
172
77c8144a
JB		 173 sband = local->hw.wiphy->bands[wk->chan->band];
174
76f27364
SG		 175 if (wk->assoc.supp_rates_len) {
176 /*
177 * Get all rates supported by the device and the AP as
178 * some APs don't like getting a superset of their rates
179 * in the association request (e.g. D-Link DAP 1353 in
180 * b-only mode)...
181 */
182 rates_len = ieee80211_compatible_rates(wk->assoc.supp_rates,
183 wk->assoc.supp_rates_len,
184 sband, &rates);
185 } else {
186 /*
187 * In case AP not provide any supported rates information
188 * before association, we send information element(s) with
189 * all rates that we support.
190 */
191 rates = ~0;
192 rates_len = sband->n_bitrates;
193 }
77c8144a
JB		 194
195 skb = alloc_skb(local->hw.extra_tx_headroom +
196 sizeof(*mgmt) + /* bit too much but doesn't matter */
197 2 + wk->assoc.ssid_len + /* SSID */
198 4 + rates_len + /* (extended) rates */
199 4 + /* power capability */
200 2 + 2 * sband->n_channels + /* supported channels */
201 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
202 wk->ie_len + /* extra IEs */
203 9, /* WMM */
204 GFP_KERNEL);
d15b8459 205 if (!skb)
af6b6374 206 return;
d15b8459 207
af6b6374
JB		 208 skb_reserve(skb, local->hw.extra_tx_headroom);
209
af6b6374
JB		 210 capab = WLAN_CAPABILITY_ESS;
211
212 if (sband->band == IEEE80211_BAND_2GHZ) {
213 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
214 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
215 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
216 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
217 }
218
219 if (wk->assoc.capability & WLAN_CAPABILITY_PRIVACY)
220 capab |= WLAN_CAPABILITY_PRIVACY;
221
af6b6374
JB		 222 if ((wk->assoc.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
223 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
224 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
225
226 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
227 memset(mgmt, 0, 24);
228 memcpy(mgmt->da, wk->filter_ta, ETH_ALEN);
229 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
230 memcpy(mgmt->bssid, wk->filter_ta, ETH_ALEN);
231
232 if (!is_zero_ether_addr(wk->assoc.prev_bssid)) {
233 skb_put(skb, 10);
234 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
235 IEEE80211_STYPE_REASSOC_REQ);
236 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
237 mgmt->u.reassoc_req.listen_interval =
238 cpu_to_le16(local->hw.conf.listen_interval);
239 memcpy(mgmt->u.reassoc_req.current_ap, wk->assoc.prev_bssid,
240 ETH_ALEN);
241 } else {
242 skb_put(skb, 4);
243 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
244 IEEE80211_STYPE_ASSOC_REQ);
245 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
246 mgmt->u.assoc_req.listen_interval =
247 cpu_to_le16(local->hw.conf.listen_interval);
248 }
249
250 /* SSID */
0915cba3 251 pos = skb_put(skb, 2 + wk->assoc.ssid_len);
af6b6374
JB		 252 *pos++ = WLAN_EID_SSID;
253 *pos++ = wk->assoc.ssid_len;
254 memcpy(pos, wk->assoc.ssid, wk->assoc.ssid_len);
255
256 /* add all rates which were marked to be used above */
257 supp_rates_len = rates_len;
258 if (supp_rates_len > 8)
259 supp_rates_len = 8;
260
af6b6374
JB		 261 pos = skb_put(skb, supp_rates_len + 2);
262 *pos++ = WLAN_EID_SUPP_RATES;
263 *pos++ = supp_rates_len;
264
265 count = 0;
266 for (i = 0; i < sband->n_bitrates; i++) {
267 if (BIT(i) & rates) {
268 int rate = sband->bitrates[i].bitrate;
269 *pos++ = (u8) (rate / 5);
270 if (++count == 8)
271 break;
272 }
273 }
274
275 if (rates_len > count) {
276 pos = skb_put(skb, rates_len - count + 2);
277 *pos++ = WLAN_EID_EXT_SUPP_RATES;
278 *pos++ = rates_len - count;
279
280 for (i++; i < sband->n_bitrates; i++) {
281 if (BIT(i) & rates) {
282 int rate = sband->bitrates[i].bitrate;
283 *pos++ = (u8) (rate / 5);
284 }
285 }
286 }
287
288 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
289 /* 1. power capabilities */
290 pos = skb_put(skb, 4);
291 *pos++ = WLAN_EID_PWR_CAPABILITY;
292 *pos++ = 2;
293 *pos++ = 0; /* min tx power */
77c8144a 294 *pos++ = wk->chan->max_power; /* max tx power */
af6b6374
JB		 295
296 /* 2. supported channels */
297 /* TODO: get this in reg domain format */
298 pos = skb_put(skb, 2 * sband->n_channels + 2);
299 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
300 *pos++ = 2 * sband->n_channels;
301 for (i = 0; i < sband->n_channels; i++) {
302 *pos++ = ieee80211_frequency_to_channel(
303 sband->channels[i].center_freq);
304 *pos++ = 1; /* one channel in the subband*/
305 }
306 }
307
8e664fb3 308 /* if present, add any custom IEs that go before HT */
af6b6374 309 if (wk->ie_len && wk->ie) {
8e664fb3
JB		 310 static const u8 before_ht[] = {
311 WLAN_EID_SSID,
312 WLAN_EID_SUPP_RATES,
313 WLAN_EID_EXT_SUPP_RATES,
314 WLAN_EID_PWR_CAPABILITY,
315 WLAN_EID_SUPPORTED_CHANNELS,
316 WLAN_EID_RSN,
317 WLAN_EID_QOS_CAPA,
318 WLAN_EID_RRM_ENABLED_CAPABILITIES,
319 WLAN_EID_MOBILITY_DOMAIN,
320 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
321 };
322 noffset = ieee80211_ie_split(wk->ie, wk->ie_len,
323 before_ht, ARRAY_SIZE(before_ht),
324 offset);
325 pos = skb_put(skb, noffset - offset);
326 memcpy(pos, wk->ie + offset, noffset - offset);
327 offset = noffset;
af6b6374
JB		 328 }
329
77c8144a
JB		 330 if (wk->assoc.use_11n && wk->assoc.wmm_used &&
331 local->hw.queues >= 4)
332 ieee80211_add_ht_ie(skb, wk->assoc.ht_information_ie,
333 sband, wk->chan, wk->assoc.smps);
334
8e664fb3
JB		 335 /* if present, add any custom non-vendor IEs that go after HT */
336 if (wk->ie_len && wk->ie) {
337 noffset = ieee80211_ie_split_vendor(wk->ie, wk->ie_len,
338 offset);
339 pos = skb_put(skb, noffset - offset);
340 memcpy(pos, wk->ie + offset, noffset - offset);
341 offset = noffset;
342 }
343
af6b6374 344 if (wk->assoc.wmm_used && local->hw.queues >= 4) {
ab13315a 345 if (wk->assoc.uapsd_used) {
50ae0cf1
KV		 346 qos_info = local->uapsd_queues;
347 qos_info |= (local->uapsd_max_sp_len <<
ab13315a
KV		 348 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
349 } else {
350 qos_info = 0;
351 }
352
af6b6374
JB		 353 pos = skb_put(skb, 9);
354 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
355 *pos++ = 7; /* len */
356 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
357 *pos++ = 0x50;
358 *pos++ = 0xf2;
359 *pos++ = 2; /* WME */
360 *pos++ = 0; /* WME info */
361 *pos++ = 1; /* WME ver */
ab13315a 362 *pos++ = qos_info;
af6b6374
JB		 363 }
364
8e664fb3
JB		 365 /* add any remaining custom (i.e. vendor specific here) IEs */
366 if (wk->ie_len && wk->ie) {
367 noffset = wk->ie_len;
368 pos = skb_put(skb, noffset - offset);
369 memcpy(pos, wk->ie + offset, noffset - offset);
370 }
371
af6b6374
JB		 372 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
373 ieee80211_tx_skb(sdata, skb);
374}
375
376static void ieee80211_remove_auth_bss(struct ieee80211_local *local,
377 struct ieee80211_work *wk)
378{
379 struct cfg80211_bss *cbss;
380 u16 capa_val = WLAN_CAPABILITY_ESS;
381
382 if (wk->probe_auth.privacy)
383 capa_val |= WLAN_CAPABILITY_PRIVACY;
384
385 cbss = cfg80211_get_bss(local->hw.wiphy, wk->chan, wk->filter_ta,
386 wk->probe_auth.ssid, wk->probe_auth.ssid_len,
387 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
388 capa_val);
389 if (!cbss)
390 return;
391
392 cfg80211_unlink_bss(local->hw.wiphy, cbss);
393 cfg80211_put_bss(cbss);
394}
395
396static enum work_action __must_check
397ieee80211_direct_probe(struct ieee80211_work *wk)
398{
399 struct ieee80211_sub_if_data *sdata = wk->sdata;
400 struct ieee80211_local *local = sdata->local;
401
b2abb6e2
JB		 402 if (!wk->probe_auth.synced) {
403 int ret = drv_tx_sync(local, sdata, wk->filter_ta,
404 IEEE80211_TX_SYNC_AUTH);
405 if (ret)
406 return WORK_ACT_TIMEOUT;
407 }
408 wk->probe_auth.synced = true;
409
af6b6374
JB		 410 wk->probe_auth.tries++;
411 if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) {
7d3a1c3b 412 printk(KERN_DEBUG "%s: direct probe to %pM timed out\n",
af6b6374
JB		 413 sdata->name, wk->filter_ta);
414
415 /*
416 * Most likely AP is not in the range so remove the
417 * bss struct for that AP.
418 */
419 ieee80211_remove_auth_bss(local, wk);
420
af6b6374
JB		 421 return WORK_ACT_TIMEOUT;
422 }
423
2f886750
BG		 424 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
425 sdata->name, wk->filter_ta, wk->probe_auth.tries,
426 IEEE80211_AUTH_MAX_TRIES);
af6b6374
JB		 427
428 /*
429 * Direct probe is sent to broadcast address as some APs
430 * will not answer to direct packet in unassociated state.
431 */
432 ieee80211_send_probe_req(sdata, NULL, wk->probe_auth.ssid,
85a237fe 433 wk->probe_auth.ssid_len, NULL, 0,
aad14ceb 434 (u32) -1, true, false);
af6b6374
JB		 435
436 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
437 run_again(local, wk->timeout);
438
439 return WORK_ACT_NONE;
440}
441
442
443static enum work_action __must_check
444ieee80211_authenticate(struct ieee80211_work *wk)
445{
446 struct ieee80211_sub_if_data *sdata = wk->sdata;
447 struct ieee80211_local *local = sdata->local;
448
b2abb6e2
JB		 449 if (!wk->probe_auth.synced) {
450 int ret = drv_tx_sync(local, sdata, wk->filter_ta,
451 IEEE80211_TX_SYNC_AUTH);
452 if (ret)
453 return WORK_ACT_TIMEOUT;
454 }
455 wk->probe_auth.synced = true;
456
af6b6374
JB		 457 wk->probe_auth.tries++;
458 if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) {
7d3a1c3b 459 printk(KERN_DEBUG "%s: authentication with %pM"
af6b6374
JB		 460 " timed out\n", sdata->name, wk->filter_ta);
461
462 /*
463 * Most likely AP is not in the range so remove the
464 * bss struct for that AP.
465 */
466 ieee80211_remove_auth_bss(local, wk);
467
af6b6374
JB		 468 return WORK_ACT_TIMEOUT;
469 }
470
7d3a1c3b 471 printk(KERN_DEBUG "%s: authenticate with %pM (try %d)\n",
af6b6374
JB		 472 sdata->name, wk->filter_ta, wk->probe_auth.tries);
473
474 ieee80211_send_auth(sdata, 1, wk->probe_auth.algorithm, wk->ie,
475 wk->ie_len, wk->filter_ta, NULL, 0, 0);
476 wk->probe_auth.transaction = 2;
477
478 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
479 run_again(local, wk->timeout);
480
481 return WORK_ACT_NONE;
482}
483
484static enum work_action __must_check
485ieee80211_associate(struct ieee80211_work *wk)
486{
487 struct ieee80211_sub_if_data *sdata = wk->sdata;
488 struct ieee80211_local *local = sdata->local;
489
b2abb6e2
JB		 490 if (!wk->assoc.synced) {
491 int ret = drv_tx_sync(local, sdata, wk->filter_ta,
492 IEEE80211_TX_SYNC_ASSOC);
493 if (ret)
494 return WORK_ACT_TIMEOUT;
495 }
496 wk->assoc.synced = true;
497
af6b6374
JB		 498 wk->assoc.tries++;
499 if (wk->assoc.tries > IEEE80211_ASSOC_MAX_TRIES) {
7d3a1c3b 500 printk(KERN_DEBUG "%s: association with %pM"
af6b6374
JB		 501 " timed out\n",
502 sdata->name, wk->filter_ta);
503
504 /*
505 * Most likely AP is not in the range so remove the
506 * bss struct for that AP.
507 */
508 if (wk->assoc.bss)
0c1ad2ca 509 cfg80211_unlink_bss(local->hw.wiphy, wk->assoc.bss);
af6b6374 510
af6b6374
JB		 511 return WORK_ACT_TIMEOUT;
512 }
513
7d3a1c3b 514 printk(KERN_DEBUG "%s: associate with %pM (try %d)\n",
af6b6374
JB		 515 sdata->name, wk->filter_ta, wk->assoc.tries);
516 ieee80211_send_assoc(sdata, wk);
517
518 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
519 run_again(local, wk->timeout);
520
521 return WORK_ACT_NONE;
522}
523
b8bc4b0a
JB		 524static enum work_action __must_check
525ieee80211_remain_on_channel_timeout(struct ieee80211_work *wk)
526{
b8bc4b0a
JB		 527 /*
528 * First time we run, do nothing -- the generic code will
529 * have switched to the right channel etc.
530 */
723bae7e 531 if (!wk->started) {
e4da8c37 532 wk->timeout = jiffies + msecs_to_jiffies(wk->remain.duration);
b8bc4b0a 533
1990ca61
KV		 534 cfg80211_ready_on_channel(wk->sdata->dev, (unsigned long) wk,
535 wk->chan, wk->chan_type,
536 wk->remain.duration, GFP_KERNEL);
b8bc4b0a 537
e4da8c37 538 return WORK_ACT_NONE;
b8bc4b0a
JB		 539 }
540
e4da8c37 541 return WORK_ACT_TIMEOUT;
b8bc4b0a
JB		 542}
543
f30221e4
JB		 544static enum work_action __must_check
545ieee80211_offchannel_tx(struct ieee80211_work *wk)
546{
547 if (!wk->started) {
548 wk->timeout = jiffies + msecs_to_jiffies(wk->offchan_tx.wait);
549
550 /*
551 * After this, offchan_tx.frame remains but now is no
552 * longer a valid pointer -- we still need it as the
28a1bcdb 553 * cookie for canceling this work/status matching.
f30221e4
JB		 554 */
555 ieee80211_tx_skb(wk->sdata, wk->offchan_tx.frame);
556
557 return WORK_ACT_NONE;
558 }
559
560 return WORK_ACT_TIMEOUT;
561}
562
e5b900d2
JB		 563static enum work_action __must_check
564ieee80211_assoc_beacon_wait(struct ieee80211_work *wk)
565{
566 if (wk->started)
567 return WORK_ACT_TIMEOUT;
568
569 /*
570 * Wait up to one beacon interval ...
571 * should this be more if we miss one?
572 */
573 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
574 wk->sdata->name, wk->filter_ta);
575 wk->timeout = TU_TO_EXP_TIME(wk->assoc.bss->beacon_interval);
576 return WORK_ACT_NONE;
577}
578
af6b6374
JB		 579static void ieee80211_auth_challenge(struct ieee80211_work *wk,
580 struct ieee80211_mgmt *mgmt,
581 size_t len)
582{
583 struct ieee80211_sub_if_data *sdata = wk->sdata;
584 u8 *pos;
585 struct ieee802_11_elems elems;
586
587 pos = mgmt->u.auth.variable;
588 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
589 if (!elems.challenge)
590 return;
591 ieee80211_send_auth(sdata, 3, wk->probe_auth.algorithm,
592 elems.challenge - 2, elems.challenge_len + 2,
593 wk->filter_ta, wk->probe_auth.key,
594 wk->probe_auth.key_len, wk->probe_auth.key_idx);
595 wk->probe_auth.transaction = 4;
596}
597
598static enum work_action __must_check
599ieee80211_rx_mgmt_auth(struct ieee80211_work *wk,
600 struct ieee80211_mgmt *mgmt, size_t len)
601{
602 u16 auth_alg, auth_transaction, status_code;
603
604 if (wk->type != IEEE80211_WORK_AUTH)
b8d92c9c 605 return WORK_ACT_MISMATCH;
af6b6374
JB		 606
607 if (len < 24 + 6)
608 return WORK_ACT_NONE;
609
610 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
611 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
612 status_code = le16_to_cpu(mgmt->u.auth.status_code);
613
614 if (auth_alg != wk->probe_auth.algorithm ||
615 auth_transaction != wk->probe_auth.transaction)
616 return WORK_ACT_NONE;
617
618 if (status_code != WLAN_STATUS_SUCCESS) {
619 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
620 wk->sdata->name, mgmt->sa, status_code);
621 return WORK_ACT_DONE;
622 }
623
624 switch (wk->probe_auth.algorithm) {
625 case WLAN_AUTH_OPEN:
626 case WLAN_AUTH_LEAP:
627 case WLAN_AUTH_FT:
628 break;
629 case WLAN_AUTH_SHARED_KEY:
630 if (wk->probe_auth.transaction != 4) {
631 ieee80211_auth_challenge(wk, mgmt, len);
632 /* need another frame */
633 return WORK_ACT_NONE;
634 }
635 break;
636 default:
637 WARN_ON(1);
638 return WORK_ACT_NONE;
639 }
640
641 printk(KERN_DEBUG "%s: authenticated\n", wk->sdata->name);
642 return WORK_ACT_DONE;
643}
644
645static enum work_action __must_check
646ieee80211_rx_mgmt_assoc_resp(struct ieee80211_work *wk,
647 struct ieee80211_mgmt *mgmt, size_t len,
648 bool reassoc)
649{
650 struct ieee80211_sub_if_data *sdata = wk->sdata;
651 struct ieee80211_local *local = sdata->local;
652 u16 capab_info, status_code, aid;
653 struct ieee802_11_elems elems;
654 u8 *pos;
655
b8d92c9c
JB		 656 if (wk->type != IEEE80211_WORK_ASSOC)
657 return WORK_ACT_MISMATCH;
658
af6b6374
JB		 659 /*
660 * AssocResp and ReassocResp have identical structure, so process both
661 * of them in this function.
662 */
663
664 if (len < 24 + 6)
665 return WORK_ACT_NONE;
666
667 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
668 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
669 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
670
671 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
672 "status=%d aid=%d)\n",
673 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
674 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
675
676 pos = mgmt->u.assoc_resp.variable;
677 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
678
679 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
680 elems.timeout_int && elems.timeout_int_len == 5 &&
681 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
682 u32 tu, ms;
683 tu = get_unaligned_le32(elems.timeout_int + 1);
684 ms = tu * 1024 / 1000;
7d3a1c3b 685 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
af6b6374 686 "comeback duration %u TU (%u ms)\n",
7d3a1c3b 687 sdata->name, mgmt->sa, tu, ms);
af6b6374
JB		 688 wk->timeout = jiffies + msecs_to_jiffies(ms);
689 if (ms > IEEE80211_ASSOC_TIMEOUT)
690 run_again(local, wk->timeout);
691 return WORK_ACT_NONE;
692 }
693
694 if (status_code != WLAN_STATUS_SUCCESS)
7d3a1c3b
JB		 695 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
696 sdata->name, mgmt->sa, status_code);
af6b6374
JB		 697 else
698 printk(KERN_DEBUG "%s: associated\n", sdata->name);
699
700 return WORK_ACT_DONE;
701}
702
703static enum work_action __must_check
704ieee80211_rx_mgmt_probe_resp(struct ieee80211_work *wk,
705 struct ieee80211_mgmt *mgmt, size_t len,
706 struct ieee80211_rx_status *rx_status)
707{
708 struct ieee80211_sub_if_data *sdata = wk->sdata;
709 struct ieee80211_local *local = sdata->local;
710 size_t baselen;
711
712 ASSERT_WORK_MTX(local);
713
b8d92c9c
JB		 714 if (wk->type != IEEE80211_WORK_DIRECT_PROBE)
715 return WORK_ACT_MISMATCH;
716
717 if (len < 24 + 12)
718 return WORK_ACT_NONE;
719
af6b6374
JB		 720 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
721 if (baselen > len)
722 return WORK_ACT_NONE;
723
724 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
725 return WORK_ACT_DONE;
726}
727
e5b900d2
JB		 728static enum work_action __must_check
729ieee80211_rx_mgmt_beacon(struct ieee80211_work *wk,
730 struct ieee80211_mgmt *mgmt, size_t len)
731{
732 struct ieee80211_sub_if_data *sdata = wk->sdata;
733 struct ieee80211_local *local = sdata->local;
734
735 ASSERT_WORK_MTX(local);
736
737 if (wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
738 return WORK_ACT_MISMATCH;
739
740 if (len < 24 + 12)
741 return WORK_ACT_NONE;
742
743 printk(KERN_DEBUG "%s: beacon received\n", sdata->name);
744 return WORK_ACT_DONE;
745}
746
af6b6374
JB		 747static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local,
748 struct sk_buff *skb)
749{
750 struct ieee80211_rx_status *rx_status;
751 struct ieee80211_mgmt *mgmt;
752 struct ieee80211_work *wk;
021570e5 753 enum work_action rma = WORK_ACT_NONE;
af6b6374
JB		 754 u16 fc;
755
756 rx_status = (struct ieee80211_rx_status *) skb->cb;
757 mgmt = (struct ieee80211_mgmt *) skb->data;
758 fc = le16_to_cpu(mgmt->frame_control);
759
a1699b75 760 mutex_lock(&local->mtx);
af6b6374
JB		 761
762 list_for_each_entry(wk, &local->work_list, list) {
763 const u8 *bssid = NULL;
764
765 switch (wk->type) {
766 case IEEE80211_WORK_DIRECT_PROBE:
767 case IEEE80211_WORK_AUTH:
768 case IEEE80211_WORK_ASSOC:
e5b900d2 769 case IEEE80211_WORK_ASSOC_BEACON_WAIT:
af6b6374
JB		 770 bssid = wk->filter_ta;
771 break;
772 default:
773 continue;
774 }
775
776 /*
777 * Before queuing, we already verified mgmt->sa,
778 * so this is needed just for matching.
779 */
780 if (compare_ether_addr(bssid, mgmt->bssid))
781 continue;
782
783 switch (fc & IEEE80211_FCTL_STYPE) {
e5b900d2
JB		 784 case IEEE80211_STYPE_BEACON:
785 rma = ieee80211_rx_mgmt_beacon(wk, mgmt, skb->len);
786 break;
af6b6374
JB		 787 case IEEE80211_STYPE_PROBE_RESP:
788 rma = ieee80211_rx_mgmt_probe_resp(wk, mgmt, skb->len,
789 rx_status);
790 break;
791 case IEEE80211_STYPE_AUTH:
792 rma = ieee80211_rx_mgmt_auth(wk, mgmt, skb->len);
793 break;
794 case IEEE80211_STYPE_ASSOC_RESP:
795 rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt,
796 skb->len, false);
797 break;
798 case IEEE80211_STYPE_REASSOC_RESP:
799 rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt,
800 skb->len, true);
801 break;
802 default:
803 WARN_ON(1);
b8d92c9c 804 rma = WORK_ACT_NONE;
af6b6374 805 }
b8d92c9c
JB		 806
807 /*
808 * We've either received an unexpected frame, or we have
809 * multiple work items and need to match the frame to the
810 * right one.
811 */
812 if (rma == WORK_ACT_MISMATCH)
813 continue;
814
af6b6374
JB		 815 /*
816 * We've processed this frame for that work, so it can't
817 * belong to another work struct.
818 * NB: this is also required for correctness for 'rma'!
819 */
820 break;
821 }
822
823 switch (rma) {
b8d92c9c
JB		 824 case WORK_ACT_MISMATCH:
825 /* ignore this unmatched frame */
826 break;
af6b6374
JB		 827 case WORK_ACT_NONE:
828 break;
829 case WORK_ACT_DONE:
830 list_del_rcu(&wk->list);
831 break;
832 default:
833 WARN(1, "unexpected: %d", rma);
834 }
835
a1699b75 836 mutex_unlock(&local->mtx);
af6b6374
JB		 837
838 if (rma != WORK_ACT_DONE)
839 goto out;
840
841 switch (wk->done(wk, skb)) {
842 case WORK_DONE_DESTROY:
843 free_work(wk);
844 break;
845 case WORK_DONE_REQUEUE:
846 synchronize_rcu();
e4da8c37 847 wk->started = false; /* restart */
a1699b75 848 mutex_lock(&local->mtx);
af6b6374 849 list_add_tail(&wk->list, &local->work_list);
a1699b75 850 mutex_unlock(&local->mtx);
af6b6374
JB		 851 }
852
853 out:
854 kfree_skb(skb);
855}
856
da2fd1f0
BG		 857static bool ieee80211_work_ct_coexists(enum nl80211_channel_type wk_ct,
858 enum nl80211_channel_type oper_ct)
859{
860 switch (wk_ct) {
861 case NL80211_CHAN_NO_HT:
862 return true;
863 case NL80211_CHAN_HT20:
864 if (oper_ct != NL80211_CHAN_NO_HT)
865 return true;
866 return false;
867 case NL80211_CHAN_HT40MINUS:
868 case NL80211_CHAN_HT40PLUS:
869 return (wk_ct == oper_ct);
870 }
871 WARN_ON(1); /* shouldn't get here */
872 return false;
873}
874
875static enum nl80211_channel_type
876ieee80211_calc_ct(enum nl80211_channel_type wk_ct,
877 enum nl80211_channel_type oper_ct)
878{
879 switch (wk_ct) {
880 case NL80211_CHAN_NO_HT:
881 return oper_ct;
882 case NL80211_CHAN_HT20:
883 if (oper_ct != NL80211_CHAN_NO_HT)
884 return oper_ct;
885 return wk_ct;
886 case NL80211_CHAN_HT40MINUS:
887 case NL80211_CHAN_HT40PLUS:
888 return wk_ct;
889 }
890 WARN_ON(1); /* shouldn't get here */
891 return wk_ct;
892}
893
894
af6b6374
JB		 895static void ieee80211_work_timer(unsigned long data)
896{
897 struct ieee80211_local *local = (void *) data;
898
899 if (local->quiescing)
900 return;
901
902 ieee80211_queue_work(&local->hw, &local->work_work);
903}
904
905static void ieee80211_work_work(struct work_struct *work)
906{
907 struct ieee80211_local *local =
908 container_of(work, struct ieee80211_local, work_work);
909 struct sk_buff *skb;
910 struct ieee80211_work *wk, *tmp;
911 LIST_HEAD(free_work);
912 enum work_action rma;
e4da8c37 913 bool remain_off_channel = false;
af6b6374
JB		 914
915 if (local->scanning)
916 return;
917
918 /*
919 * ieee80211_queue_work() should have picked up most cases,
77c2061d 920 * here we'll pick the rest.
af6b6374
JB		 921 */
922 if (WARN(local->suspended, "work scheduled while going to suspend\n"))
923 return;
924
925 /* first process frames to avoid timing out while a frame is pending */
926 while ((skb = skb_dequeue(&local->work_skb_queue)))
927 ieee80211_work_rx_queued_mgmt(local, skb);
928
a1699b75 929 mutex_lock(&local->mtx);
af6b6374 930
7da7cc1d
JB		 931 ieee80211_recalc_idle(local);
932
af6b6374 933 list_for_each_entry_safe(wk, tmp, &local->work_list, list) {
723bae7e
JB		 934 bool started = wk->started;
935
e4da8c37 936 /* mark work as started if it's on the current off-channel */
723bae7e 937 if (!started && local->tmp_channel &&
e4da8c37
JB		 938 wk->chan == local->tmp_channel &&
939 wk->chan_type == local->tmp_channel_type) {
723bae7e 940 started = true;
81ac3462 941 wk->timeout = jiffies;
e4da8c37
JB		 942 }
943
723bae7e 944 if (!started && !local->tmp_channel) {
b23b025f
BG		 945 bool on_oper_chan;
946 bool tmp_chan_changed = false;
947 bool on_oper_chan2;
da2fd1f0 948 enum nl80211_channel_type wk_ct;
b23b025f 949 on_oper_chan = ieee80211_cfg_on_oper_channel(local);
da2fd1f0
BG		 950
951 /* Work with existing channel type if possible. */
952 wk_ct = wk->chan_type;
953 if (wk->chan == local->hw.conf.channel)
954 wk_ct = ieee80211_calc_ct(wk->chan_type,
955 local->hw.conf.channel_type);
956
b23b025f
BG		 957 if (local->tmp_channel)
958 if ((local->tmp_channel != wk->chan) ||
da2fd1f0 959 (local->tmp_channel_type != wk_ct))
b23b025f 960 tmp_chan_changed = true;
e4da8c37
JB		 961
962 local->tmp_channel = wk->chan;
da2fd1f0 963 local->tmp_channel_type = wk_ct;
b23b025f
BG		 964 /*
965 * Leave the station vifs in awake mode if they
966 * happen to be on the same channel as
967 * the requested channel.
968 */
969 on_oper_chan2 = ieee80211_cfg_on_oper_channel(local);
970 if (on_oper_chan != on_oper_chan2) {
971 if (on_oper_chan2) {
972 /* going off oper channel, PS too */
973 ieee80211_offchannel_stop_vifs(local,
974 true);
975 ieee80211_hw_config(local, 0);
976 } else {
977 /* going on channel, but leave PS
978 * off-channel. */
979 ieee80211_hw_config(local, 0);
980 ieee80211_offchannel_return(local,
981 true,
982 false);
983 }
984 } else if (tmp_chan_changed)
985 /* Still off-channel, but on some other
986 * channel, so update hardware.
987 * PS should already be off-channel.
988 */
989 ieee80211_hw_config(local, 0);
990
723bae7e 991 started = true;
e4da8c37
JB		 992 wk->timeout = jiffies;
993 }
994
995 /* don't try to work with items that aren't started */
723bae7e 996 if (!started)
e4da8c37
JB		 997 continue;
998
af6b6374
JB		 999 if (time_is_after_jiffies(wk->timeout)) {
1000 /*
1001 * This work item isn't supposed to be worked on
1002 * right now, but take care to adjust the timer
1003 * properly.
1004 */
1005 run_again(local, wk->timeout);
1006 continue;
1007 }
1008
1009 switch (wk->type) {
1010 default:
1011 WARN_ON(1);
1012 /* nothing */
1013 rma = WORK_ACT_NONE;
1014 break;
b8bc4b0a
JB		 1015 case IEEE80211_WORK_ABORT:
1016 rma = WORK_ACT_TIMEOUT;
0e0a2283 1017 break;
af6b6374
JB		 1018 case IEEE80211_WORK_DIRECT_PROBE:
1019 rma = ieee80211_direct_probe(wk);
1020 break;
1021 case IEEE80211_WORK_AUTH:
1022 rma = ieee80211_authenticate(wk);
1023 break;
1024 case IEEE80211_WORK_ASSOC:
1025 rma = ieee80211_associate(wk);
1026 break;
b8bc4b0a
JB		 1027 case IEEE80211_WORK_REMAIN_ON_CHANNEL:
1028 rma = ieee80211_remain_on_channel_timeout(wk);
1029 break;
f30221e4
JB		 1030 case IEEE80211_WORK_OFFCHANNEL_TX:
1031 rma = ieee80211_offchannel_tx(wk);
1032 break;
e5b900d2
JB		 1033 case IEEE80211_WORK_ASSOC_BEACON_WAIT:
1034 rma = ieee80211_assoc_beacon_wait(wk);
1035 break;
af6b6374
JB		 1036 }
1037
723bae7e
JB		 1038 wk->started = started;
1039
af6b6374
JB		 1040 switch (rma) {
1041 case WORK_ACT_NONE:
e4da8c37
JB		 1042 /* might have changed the timeout */
1043 run_again(local, wk->timeout);
af6b6374
JB		 1044 break;
1045 case WORK_ACT_TIMEOUT:
1046 list_del_rcu(&wk->list);
1047 synchronize_rcu();
1048 list_add(&wk->list, &free_work);
1049 break;
1050 default:
1051 WARN(1, "unexpected: %d", rma);
1052 }
1053 }
1054
e4da8c37
JB		 1055 list_for_each_entry(wk, &local->work_list, list) {
1056 if (!wk->started)
1057 continue;
1058 if (wk->chan != local->tmp_channel)
1059 continue;
da2fd1f0
BG		 1060 if (ieee80211_work_ct_coexists(wk->chan_type,
1061 local->tmp_channel_type))
e4da8c37
JB		 1062 continue;
1063 remain_off_channel = true;
1064 }
1065
1066 if (!remain_off_channel && local->tmp_channel) {
b23b025f 1067 bool on_oper_chan = ieee80211_cfg_on_oper_channel(local);
e4da8c37 1068 local->tmp_channel = NULL;
b23b025f
BG		 1069 /* If tmp_channel wasn't operating channel, then
1070 * we need to go back on-channel.
1071 * NOTE: If we can ever be here while scannning,
1072 * or if the hw_config() channel config logic changes,
1073 * then we may need to do a more thorough check to see if
1074 * we still need to do a hardware config. Currently,
1075 * we cannot be here while scanning, however.
1076 */
1077 if (ieee80211_cfg_on_oper_channel(local) && !on_oper_chan)
1078 ieee80211_hw_config(local, 0);
1079
1080 /* At the least, we need to disable offchannel_ps,
1081 * so just go ahead and run the entire offchannel
1082 * return logic here. We *could* skip enabling
1083 * beaconing if we were already on-oper-channel
1084 * as a future optimization.
1085 */
1086 ieee80211_offchannel_return(local, true, true);
1087
e4da8c37
JB		 1088 /* give connection some time to breathe */
1089 run_again(local, jiffies + HZ/2);
1090 }
1091
68dd5b7a
TP		 1092 if (list_empty(&local->work_list) && local->scan_req &&
1093 !local->scanning)
af6b6374
JB		 1094 ieee80211_queue_delayed_work(&local->hw,
1095 &local->scan_work,
1096 round_jiffies_relative(0));
1097
e4da8c37
JB		 1098 ieee80211_recalc_idle(local);
1099
7da7cc1d
JB		 1100 mutex_unlock(&local->mtx);
1101
af6b6374
JB		 1102 list_for_each_entry_safe(wk, tmp, &free_work, list) {
1103 wk->done(wk, NULL);
1104 list_del(&wk->list);
1105 kfree(wk);
1106 }
1107}
1108
1109void ieee80211_add_work(struct ieee80211_work *wk)
1110{
1111 struct ieee80211_local *local;
1112
1113 if (WARN_ON(!wk->chan))
1114 return;
1115
1116 if (WARN_ON(!wk->sdata))
1117 return;
1118
1119 if (WARN_ON(!wk->done))
1120 return;
1121
81ac3462
JB		 1122 if (WARN_ON(!ieee80211_sdata_running(wk->sdata)))
1123 return;
1124
e4da8c37 1125 wk->started = false;
af6b6374
JB		 1126
1127 local = wk->sdata->local;
a1699b75 1128 mutex_lock(&local->mtx);
af6b6374 1129 list_add_tail(&wk->list, &local->work_list);
a1699b75 1130 mutex_unlock(&local->mtx);
af6b6374
JB		 1131
1132 ieee80211_queue_work(&local->hw, &local->work_work);
1133}
1134
1135void ieee80211_work_init(struct ieee80211_local *local)
1136{
af6b6374
JB		 1137 INIT_LIST_HEAD(&local->work_list);
1138 setup_timer(&local->work_timer, ieee80211_work_timer,
1139 (unsigned long)local);
1140 INIT_WORK(&local->work_work, ieee80211_work_work);
1141 skb_queue_head_init(&local->work_skb_queue);
1142}
1143
1144void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata)
1145{
1146 struct ieee80211_local *local = sdata->local;
b8bc4b0a 1147 struct ieee80211_work *wk;
8808f641 1148 bool cleanup = false;
af6b6374 1149
a1699b75 1150 mutex_lock(&local->mtx);
b8bc4b0a 1151 list_for_each_entry(wk, &local->work_list, list) {
af6b6374
JB		 1152 if (wk->sdata != sdata)
1153 continue;
8808f641 1154 cleanup = true;
b8bc4b0a 1155 wk->type = IEEE80211_WORK_ABORT;
e4da8c37
JB		 1156 wk->started = true;
1157 wk->timeout = jiffies;
b8bc4b0a 1158 }
a1699b75 1159 mutex_unlock(&local->mtx);
b8bc4b0a
JB		 1160
1161 /* run cleanups etc. */
8808f641
HRK		 1162 if (cleanup)
1163 ieee80211_work_work(&local->work_work);
b8bc4b0a 1164
a1699b75 1165 mutex_lock(&local->mtx);
b8bc4b0a
JB		 1166 list_for_each_entry(wk, &local->work_list, list) {
1167 if (wk->sdata != sdata)
1168 continue;
1169 WARN_ON(1);
1170 break;
af6b6374 1171 }
a1699b75 1172 mutex_unlock(&local->mtx);
af6b6374
JB		 1173}
1174
1175ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1176 struct sk_buff *skb)
1177{
1178 struct ieee80211_local *local = sdata->local;
1179 struct ieee80211_mgmt *mgmt;
1180 struct ieee80211_work *wk;
1181 u16 fc;
1182
1183 if (skb->len < 24)
1184 return RX_DROP_MONITOR;
1185
1186 mgmt = (struct ieee80211_mgmt *) skb->data;
1187 fc = le16_to_cpu(mgmt->frame_control);
1188
1189 list_for_each_entry_rcu(wk, &local->work_list, list) {
1190 if (sdata != wk->sdata)
1191 continue;
1192 if (compare_ether_addr(wk->filter_ta, mgmt->sa))
1193 continue;
1194 if (compare_ether_addr(wk->filter_ta, mgmt->bssid))
1195 continue;
1196
1197 switch (fc & IEEE80211_FCTL_STYPE) {
1198 case IEEE80211_STYPE_AUTH:
1199 case IEEE80211_STYPE_PROBE_RESP:
1200 case IEEE80211_STYPE_ASSOC_RESP:
1201 case IEEE80211_STYPE_REASSOC_RESP:
e5b900d2 1202 case IEEE80211_STYPE_BEACON:
af6b6374
JB		 1203 skb_queue_tail(&local->work_skb_queue, skb);
1204 ieee80211_queue_work(&local->hw, &local->work_work);
1205 return RX_QUEUED;
1206 }
1207 }
1208
1209 return RX_CONTINUE;
1210}
b8bc4b0a 1211
e4da8c37
JB		 1212static enum work_done_result ieee80211_remain_done(struct ieee80211_work *wk,
1213 struct sk_buff *skb)
1214{
1215 /*
1216 * We are done serving the remain-on-channel command.
1217 */
1990ca61 1218 cfg80211_remain_on_channel_expired(wk->sdata->dev, (unsigned long) wk,
e4da8c37
JB		 1219 wk->chan, wk->chan_type,
1220 GFP_KERNEL);
1221
1222 return WORK_DONE_DESTROY;
1223}
1224
b8bc4b0a
JB		 1225int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1226 struct ieee80211_channel *chan,
1227 enum nl80211_channel_type channel_type,
1228 unsigned int duration, u64 *cookie)
1229{
b8bc4b0a
JB		 1230 struct ieee80211_work *wk;
1231
1232 wk = kzalloc(sizeof(*wk), GFP_KERNEL);
1233 if (!wk)
1234 return -ENOMEM;
1235
1236 wk->type = IEEE80211_WORK_REMAIN_ON_CHANNEL;
1237 wk->chan = chan;
e4da8c37 1238 wk->chan_type = channel_type;
b8bc4b0a 1239 wk->sdata = sdata;
e4da8c37 1240 wk->done = ieee80211_remain_done;
b8bc4b0a 1241
e4da8c37 1242 wk->remain.duration = duration;
b8bc4b0a 1243
1990ca61 1244 *cookie = (unsigned long) wk;
b8bc4b0a
JB		 1245
1246 ieee80211_add_work(wk);
1247
b8bc4b0a
JB		 1248 return 0;
1249}
1250
1251int ieee80211_wk_cancel_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1252 u64 cookie)
1253{
1254 struct ieee80211_local *local = sdata->local;
1255 struct ieee80211_work *wk, *tmp;
1256 bool found = false;
1257
a1699b75 1258 mutex_lock(&local->mtx);
b8bc4b0a 1259 list_for_each_entry_safe(wk, tmp, &local->work_list, list) {
1990ca61 1260 if ((unsigned long) wk == cookie) {
e4da8c37 1261 wk->timeout = jiffies;
b8bc4b0a 1262 found = true;
b8bc4b0a
JB		 1263 break;
1264 }
1265 }
a1699b75 1266 mutex_unlock(&local->mtx);
b8bc4b0a
JB		 1267
1268 if (!found)
1269 return -ENOENT;
1270
e4da8c37 1271 ieee80211_queue_work(&local->hw, &local->work_work);
b8bc4b0a
JB		 1272
1273 return 0;
1274}
Linux 6.x block layer and io_uring tree(s)