summaryrefslogtreecommitdiff
path: root/net/wireless/pmsr.c
blob: 2bc647720cda5cc06c4f674425b67439b1fb4e68 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2018 - 2021 Intel Corporation
 */
#include <net/cfg80211.h>
#include "core.h"
#include "nl80211.h"
#include "rdev-ops.h"

static int pmsr_parse_ftm(struct cfg80211_registered_device *rdev,
			  struct nlattr *ftmreq,
			  struct cfg80211_pmsr_request_peer *out,
			  struct genl_info *info)
{
	const struct cfg80211_pmsr_capabilities *capa = rdev->wiphy.pmsr_capa;
	struct nlattr *tb[NL80211_PMSR_FTM_REQ_ATTR_MAX + 1];
	u32 preamble = NL80211_PREAMBLE_DMG; /* only optional in DMG */

	/* validate existing data */
	if (!(rdev->wiphy.pmsr_capa->ftm.bandwidths & BIT(out->chandef.width))) {
		NL_SET_ERR_MSG(info->extack, "FTM: unsupported bandwidth");
		return -EINVAL;
	}

	/* no validation needed - was already done via nested policy */
	nla_parse_nested_deprecated(tb, NL80211_PMSR_FTM_REQ_ATTR_MAX, ftmreq,
				    NULL, NULL);

	if (tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE])
		preamble = nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE]);

	/* set up values - struct is 0-initialized */
	out->ftm.requested = true;

	switch (out->chandef.chan->band) {
	case NL80211_BAND_60GHZ:
		/* optional */
		break;
	default:
		if (!tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE]) {
			NL_SET_ERR_MSG(info->extack,
				       "FTM: must specify preamble");
			return -EINVAL;
		}
	}

	if (!(capa->ftm.preambles & BIT(preamble))) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE],
				    "FTM: invalid preamble");
		return -EINVAL;
	}

	out->ftm.preamble = preamble;

	out->ftm.burst_period = 0;
	if (tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD])
		out->ftm.burst_period =
			nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD]);

	out->ftm.asap = !!tb[NL80211_PMSR_FTM_REQ_ATTR_ASAP];
	if (out->ftm.asap && !capa->ftm.asap) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_ASAP],
				    "FTM: ASAP mode not supported");
		return -EINVAL;
	}

	if (!out->ftm.asap && !capa->ftm.non_asap) {
		NL_SET_ERR_MSG(info->extack,
			       "FTM: non-ASAP mode not supported");
		return -EINVAL;
	}

	out->ftm.num_bursts_exp = 0;
	if (tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP])
		out->ftm.num_bursts_exp =
			nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP]);

	if (capa->ftm.max_bursts_exponent >= 0 &&
	    out->ftm.num_bursts_exp > capa->ftm.max_bursts_exponent) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP],
				    "FTM: max NUM_BURSTS_EXP must be set lower than the device limit");
		return -EINVAL;
	}

	out->ftm.burst_duration = 15;
	if (tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION])
		out->ftm.burst_duration =
			nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION]);

	out->ftm.ftms_per_burst = 0;
	if (tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST])
		out->ftm.ftms_per_burst =
			nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST]);

	if (capa->ftm.max_ftms_per_burst &&
	    (out->ftm.ftms_per_burst > capa->ftm.max_ftms_per_burst ||
	     out->ftm.ftms_per_burst == 0)) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST],
				    "FTM: FTMs per burst must be set lower than the device limit but non-zero");
		return -EINVAL;
	}

	out->ftm.ftmr_retries = 3;
	if (tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES])
		out->ftm.ftmr_retries =
			nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES]);

	out->ftm.request_lci = !!tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_LCI];
	if (out->ftm.request_lci && !capa->ftm.request_lci) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_LCI],
				    "FTM: LCI request not supported");
	}

	out->ftm.request_civicloc =
		!!tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_CIVICLOC];
	if (out->ftm.request_civicloc && !capa->ftm.request_civicloc) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_CIVICLOC],
			    "FTM: civic location request not supported");
	}

	out->ftm.trigger_based =
		!!tb[NL80211_PMSR_FTM_REQ_ATTR_TRIGGER_BASED];
	if (out->ftm.trigger_based && !capa->ftm.trigger_based) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_TRIGGER_BASED],
				    "FTM: trigger based ranging is not supported");
		return -EINVAL;
	}

	out->ftm.non_trigger_based =
		!!tb[NL80211_PMSR_FTM_REQ_ATTR_NON_TRIGGER_BASED];
	if (out->ftm.non_trigger_based && !capa->ftm.non_trigger_based) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_NON_TRIGGER_BASED],
				    "FTM: trigger based ranging is not supported");
		return -EINVAL;
	}

	if (out->ftm.trigger_based && out->ftm.non_trigger_based) {
		NL_SET_ERR_MSG(info->extack,
			       "FTM: can't set both trigger based and non trigger based");
		return -EINVAL;
	}

	if ((out->ftm.trigger_based || out->ftm.non_trigger_based) &&
	    out->ftm.preamble != NL80211_PREAMBLE_HE) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE],
				    "FTM: non EDCA based ranging must use HE preamble");
		return -EINVAL;
	}

	out->ftm.lmr_feedback =
		!!tb[NL80211_PMSR_FTM_REQ_ATTR_LMR_FEEDBACK];
	if (!out->ftm.trigger_based && !out->ftm.non_trigger_based &&
	    out->ftm.lmr_feedback) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_FTM_REQ_ATTR_LMR_FEEDBACK],
				    "FTM: LMR feedback set for EDCA based ranging");
		return -EINVAL;
	}

	if (tb[NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR]) {
		if (!out->ftm.non_trigger_based && !out->ftm.trigger_based) {
			NL_SET_ERR_MSG_ATTR(info->extack,
					    tb[NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR],
					    "FTM: BSS color set for EDCA based ranging");
			return -EINVAL;
		}

		out->ftm.bss_color =
			nla_get_u8(tb[NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR]);
	}

	return 0;
}

static int pmsr_parse_peer(struct cfg80211_registered_device *rdev,
			   struct nlattr *peer,
			   struct cfg80211_pmsr_request_peer *out,
			   struct genl_info *info)
{
	struct nlattr *tb[NL80211_PMSR_PEER_ATTR_MAX + 1];
	struct nlattr *req[NL80211_PMSR_REQ_ATTR_MAX + 1];
	struct nlattr *treq;
	int err, rem;

	/* no validation needed - was already done via nested policy */
	nla_parse_nested_deprecated(tb, NL80211_PMSR_PEER_ATTR_MAX, peer,
				    NULL, NULL);

	if (!tb[NL80211_PMSR_PEER_ATTR_ADDR] ||
	    !tb[NL80211_PMSR_PEER_ATTR_CHAN] ||
	    !tb[NL80211_PMSR_PEER_ATTR_REQ]) {
		NL_SET_ERR_MSG_ATTR(info->extack, peer,
				    "insufficient peer data");
		return -EINVAL;
	}

	memcpy(out->addr, nla_data(tb[NL80211_PMSR_PEER_ATTR_ADDR]), ETH_ALEN);

	/* reuse info->attrs */
	memset(info->attrs, 0, sizeof(*info->attrs) * (NL80211_ATTR_MAX + 1));
	err = nla_parse_nested_deprecated(info->attrs, NL80211_ATTR_MAX,
					  tb[NL80211_PMSR_PEER_ATTR_CHAN],
					  NULL, info->extack);
	if (err)
		return err;

	err = nl80211_parse_chandef(rdev, info, &out->chandef);
	if (err)
		return err;

	/* no validation needed - was already done via nested policy */
	nla_parse_nested_deprecated(req, NL80211_PMSR_REQ_ATTR_MAX,
				    tb[NL80211_PMSR_PEER_ATTR_REQ], NULL,
				    NULL);

	if (!req[NL80211_PMSR_REQ_ATTR_DATA]) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[NL80211_PMSR_PEER_ATTR_REQ],
				    "missing request type/data");
		return -EINVAL;
	}

	if (req[NL80211_PMSR_REQ_ATTR_GET_AP_TSF])
		out->report_ap_tsf = true;

	if (out->report_ap_tsf && !rdev->wiphy.pmsr_capa->report_ap_tsf) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    req[NL80211_PMSR_REQ_ATTR_GET_AP_TSF],
				    "reporting AP TSF is not supported");
		return -EINVAL;
	}

	nla_for_each_nested(treq, req[NL80211_PMSR_REQ_ATTR_DATA], rem) {
		switch (nla_type(treq)) {
		case NL80211_PMSR_TYPE_FTM:
			err = pmsr_parse_ftm(rdev, treq, out, info);
			break;
		default:
			NL_SET_ERR_MSG_ATTR(info->extack, treq,
					    "unsupported measurement type");
			err = -EINVAL;
		}
	}

	if (err)
		return err;

	return 0;
}

int nl80211_pmsr_start(struct sk_buff *skb, struct genl_info *info)
{
	struct nlattr *reqattr = info->attrs[NL80211_ATTR_PEER_MEASUREMENTS];
	struct cfg80211_registered_device *rdev = info->user_ptr[0];
	struct wireless_dev *wdev = info->user_ptr[1];
	struct cfg80211_pmsr_request *req;
	struct nlattr *peers, *peer;
	int count, rem, err, idx;

	if (!rdev->wiphy.pmsr_capa)
		return -EOPNOTSUPP;

	if (!reqattr)
		return -EINVAL;

	peers = nla_find(nla_data(reqattr), nla_len(reqattr),
			 NL80211_PMSR_ATTR_PEERS);
	if (!peers)
		return -EINVAL;

	count = 0;
	nla_for_each_nested(peer, peers, rem) {
		count++;

		if (count > rdev->wiphy.pmsr_capa->max_peers) {
			NL_SET_ERR_MSG_ATTR(info->extack, peer,
					    "Too many peers used");
			return -EINVAL;
		}
	}

	req = kzalloc(struct_size(req, peers, count), GFP_KERNEL);
	if (!req)
		return -ENOMEM;

	if (info->attrs[NL80211_ATTR_TIMEOUT])
		req->timeout = nla_get_u32(info->attrs[NL80211_ATTR_TIMEOUT]);

	if (info->attrs[NL80211_ATTR_MAC]) {
		if (!rdev->wiphy.pmsr_capa->randomize_mac_addr) {
			NL_SET_ERR_MSG_ATTR(info->extack,
					    info->attrs[NL80211_ATTR_MAC],
					    "device cannot randomize MAC address");
			err = -EINVAL;
			goto out_err;
		}

		err = nl80211_parse_random_mac(info->attrs, req->mac_addr,
					       req->mac_addr_mask);
		if (err)
			goto out_err;
	} else {
		memcpy(req->mac_addr, wdev_address(wdev), ETH_ALEN);
		eth_broadcast_addr(req->mac_addr_mask);
	}

	idx = 0;
	nla_for_each_nested(peer, peers, rem) {
		/* NB: this reuses info->attrs, but we no longer need it */
		err = pmsr_parse_peer(rdev, peer, &req->peers[idx], info);
		if (err)
			goto out_err;
		idx++;
	}

	req->n_peers = count;
	req->cookie = cfg80211_assign_cookie(rdev);
	req->nl_portid = info->snd_portid;

	err = rdev_start_pmsr(rdev, wdev, req);
	if (err)
		goto out_err;

	list_add_tail(&req->list, &wdev->pmsr_list);

	nl_set_extack_cookie_u64(info->extack, req->cookie);
	return 0;
out_err:
	kfree(req);
	return err;
}

void cfg80211_pmsr_complete(struct wireless_dev *wdev,
			    struct cfg80211_pmsr_request *req,
			    gfp_t gfp)
{
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
	struct cfg80211_pmsr_request *tmp, *prev, *to_free = NULL;
	struct sk_buff *msg;
	void *hdr;

	trace_cfg80211_pmsr_complete(wdev->wiphy, wdev, req->cookie);

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
	if (!msg)
		goto free_request;

	hdr = nl80211hdr_put(msg, 0, 0, 0,
			     NL80211_CMD_PEER_MEASUREMENT_COMPLETE);
	if (!hdr)
		goto free_msg;

	if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
	    nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
			      NL80211_ATTR_PAD))
		goto free_msg;

	if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->cookie,
			      NL80211_ATTR_PAD))
		goto free_msg;

	genlmsg_end(msg, hdr);
	genlmsg_unicast(wiphy_net(wdev->wiphy), msg, req->nl_portid);
	goto free_request;
free_msg:
	nlmsg_free(msg);
free_request:
	spin_lock_bh(&wdev->pmsr_lock);
	/*
	 * cfg80211_pmsr_process_abort() may have already moved this request
	 * to the free list, and will free it later. In this case, don't free
	 * it here.
	 */
	list_for_each_entry_safe(tmp, prev, &wdev->pmsr_list, list) {
		if (tmp == req) {
			list_del(&req->list);
			to_free = req;
			break;
		}
	}
	spin_unlock_bh(&wdev->pmsr_lock);
	kfree(to_free);
}
EXPORT_SYMBOL_GPL(cfg80211_pmsr_complete);

static int nl80211_pmsr_send_ftm_res(struct sk_buff *msg,
				     struct cfg80211_pmsr_result *res)
{
	if (res->status == NL80211_PMSR_STATUS_FAILURE) {
		if (nla_put_u32(msg, NL80211_PMSR_FTM_RESP_ATTR_FAIL_REASON,
				res->ftm.failure_reason))
			goto error;

		if (res->ftm.failure_reason ==
			NL80211_PMSR_FTM_FAILURE_PEER_BUSY &&
		    res->ftm.busy_retry_time &&
		    nla_put_u32(msg, NL80211_PMSR_FTM_RESP_ATTR_BUSY_RETRY_TIME,
				res->ftm.busy_retry_time))
			goto error;

		return 0;
	}

#define PUT(tp, attr, val)						\
	do {								\
		if (nla_put_##tp(msg,					\
				 NL80211_PMSR_FTM_RESP_ATTR_##attr,	\
				 res->ftm.val))				\
			goto error;					\
	} while (0)

#define PUTOPT(tp, attr, val)						\
	do {								\
		if (res->ftm.val##_valid)				\
			PUT(tp, attr, val);				\
	} while (0)

#define PUT_U64(attr, val)						\
	do {								\
		if (nla_put_u64_64bit(msg,				\
				      NL80211_PMSR_FTM_RESP_ATTR_##attr,\
				      res->ftm.val,			\
				      NL80211_PMSR_FTM_RESP_ATTR_PAD))	\
			goto error;					\
	} while (0)

#define PUTOPT_U64(attr, val)						\
	do {								\
		if (res->ftm.val##_valid)				\
			PUT_U64(attr, val);				\
	} while (0)

	if (res->ftm.burst_index >= 0)
		PUT(u32, BURST_INDEX, burst_index);
	PUTOPT(u32, NUM_FTMR_ATTEMPTS, num_ftmr_attempts);
	PUTOPT(u32, NUM_FTMR_SUCCESSES, num_ftmr_successes);
	PUT(u8, NUM_BURSTS_EXP, num_bursts_exp);
	PUT(u8, BURST_DURATION, burst_duration);
	PUT(u8, FTMS_PER_BURST, ftms_per_burst);
	PUTOPT(s32, RSSI_AVG, rssi_avg);
	PUTOPT(s32, RSSI_SPREAD, rssi_spread);
	if (res->ftm.tx_rate_valid &&
	    !nl80211_put_sta_rate(msg, &res->ftm.tx_rate,
				  NL80211_PMSR_FTM_RESP_ATTR_TX_RATE))
		goto error;
	if (res->ftm.rx_rate_valid &&
	    !nl80211_put_sta_rate(msg, &res->ftm.rx_rate,
				  NL80211_PMSR_FTM_RESP_ATTR_RX_RATE))
		goto error;
	PUTOPT_U64(RTT_AVG, rtt_avg);
	PUTOPT_U64(RTT_VARIANCE, rtt_variance);
	PUTOPT_U64(RTT_SPREAD, rtt_spread);
	PUTOPT_U64(DIST_AVG, dist_avg);
	PUTOPT_U64(DIST_VARIANCE, dist_variance);
	PUTOPT_U64(DIST_SPREAD, dist_spread);
	if (res->ftm.lci && res->ftm.lci_len &&
	    nla_put(msg, NL80211_PMSR_FTM_RESP_ATTR_LCI,
		    res->ftm.lci_len, res->ftm.lci))
		goto error;
	if (res->ftm.civicloc && res->ftm.civicloc_len &&
	    nla_put(msg, NL80211_PMSR_FTM_RESP_ATTR_CIVICLOC,
		    res->ftm.civicloc_len, res->ftm.civicloc))
		goto error;
#undef PUT
#undef PUTOPT
#undef PUT_U64
#undef PUTOPT_U64

	return 0;
error:
	return -ENOSPC;
}

static int nl80211_pmsr_send_result(struct sk_buff *msg,
				    struct cfg80211_pmsr_result *res)
{
	struct nlattr *pmsr, *peers, *peer, *resp, *data, *typedata;

	pmsr = nla_nest_start_noflag(msg, NL80211_ATTR_PEER_MEASUREMENTS);
	if (!pmsr)
		goto error;

	peers = nla_nest_start_noflag(msg, NL80211_PMSR_ATTR_PEERS);
	if (!peers)
		goto error;

	peer = nla_nest_start_noflag(msg, 1);
	if (!peer)
		goto error;

	if (nla_put(msg, NL80211_PMSR_PEER_ATTR_ADDR, ETH_ALEN, res->addr))
		goto error;

	resp = nla_nest_start_noflag(msg, NL80211_PMSR_PEER_ATTR_RESP);
	if (!resp)
		goto error;

	if (nla_put_u32(msg, NL80211_PMSR_RESP_ATTR_STATUS, res->status) ||
	    nla_put_u64_64bit(msg, NL80211_PMSR_RESP_ATTR_HOST_TIME,
			      res->host_time, NL80211_PMSR_RESP_ATTR_PAD))
		goto error;

	if (res->ap_tsf_valid &&
	    nla_put_u64_64bit(msg, NL80211_PMSR_RESP_ATTR_AP_TSF,
			      res->ap_tsf, NL80211_PMSR_RESP_ATTR_PAD))
		goto error;

	if (res->final && nla_put_flag(msg, NL80211_PMSR_RESP_ATTR_FINAL))
		goto error;

	data = nla_nest_start_noflag(msg, NL80211_PMSR_RESP_ATTR_DATA);
	if (!data)
		goto error;

	typedata = nla_nest_start_noflag(msg, res->type);
	if (!typedata)
		goto error;

	switch (res->type) {
	case NL80211_PMSR_TYPE_FTM:
		if (nl80211_pmsr_send_ftm_res(msg, res))
			goto error;
		break;
	default:
		WARN_ON(1);
	}

	nla_nest_end(msg, typedata);
	nla_nest_end(msg, data);
	nla_nest_end(msg, resp);
	nla_nest_end(msg, peer);
	nla_nest_end(msg, peers);
	nla_nest_end(msg, pmsr);

	return 0;
error:
	return -ENOSPC;
}

void cfg80211_pmsr_report(struct wireless_dev *wdev,
			  struct cfg80211_pmsr_request *req,
			  struct cfg80211_pmsr_result *result,
			  gfp_t gfp)
{
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
	struct sk_buff *msg;
	void *hdr;
	int err;

	trace_cfg80211_pmsr_report(wdev->wiphy, wdev, req->cookie,
				   result->addr);

	/*
	 * Currently, only variable items are LCI and civic location,
	 * both of which are reasonably short so we don't need to
	 * worry about them here for the allocation.
	 */
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PEER_MEASUREMENT_RESULT);
	if (!hdr)
		goto free;

	if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
	    nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
			      NL80211_ATTR_PAD))
		goto free;

	if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->cookie,
			      NL80211_ATTR_PAD))
		goto free;

	err = nl80211_pmsr_send_result(msg, result);
	if (err) {
		pr_err_ratelimited("peer measurement result: message didn't fit!");
		goto free;
	}

	genlmsg_end(msg, hdr);
	genlmsg_unicast(wiphy_net(wdev->wiphy), msg, req->nl_portid);
	return;
free:
	nlmsg_free(msg);
}
EXPORT_SYMBOL_GPL(cfg80211_pmsr_report);

static void cfg80211_pmsr_process_abort(struct wireless_dev *wdev)
{
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
	struct cfg80211_pmsr_request *req, *tmp;
	LIST_HEAD(free_list);

	lockdep_assert_held(&wdev->mtx);

	spin_lock_bh(&wdev->pmsr_lock);
	list_for_each_entry_safe(req, tmp, &wdev->pmsr_list, list) {
		if (req->nl_portid)
			continue;
		list_move_tail(&req->list, &free_list);
	}
	spin_unlock_bh(&wdev->pmsr_lock);

	list_for_each_entry_safe(req, tmp, &free_list, list) {
		rdev_abort_pmsr(rdev, wdev, req);

		kfree(req);
	}
}

void cfg80211_pmsr_free_wk(struct work_struct *work)
{
	struct wireless_dev *wdev = container_of(work, struct wireless_dev,
						 pmsr_free_wk);

	wdev_lock(wdev);
	cfg80211_pmsr_process_abort(wdev);
	wdev_unlock(wdev);
}

void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev)
{
	struct cfg80211_pmsr_request *req;
	bool found = false;

	spin_lock_bh(&wdev->pmsr_lock);
	list_for_each_entry(req, &wdev->pmsr_list, list) {
		found = true;
		req->nl_portid = 0;
	}
	spin_unlock_bh(&wdev->pmsr_lock);

	if (found)
		cfg80211_pmsr_process_abort(wdev);

	WARN_ON(!list_empty(&wdev->pmsr_list));
}

void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid)
{
	struct cfg80211_pmsr_request *req;

	spin_lock_bh(&wdev->pmsr_lock);
	list_for_each_entry(req, &wdev->pmsr_list, list) {
		if (req->nl_portid == portid) {
			req->nl_portid = 0;
			schedule_work(&wdev->pmsr_free_wk);
		}
	}
	spin_unlock_bh(&wdev->pmsr_lock);
}