1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2018 - 2021, 2023 - 2024 Intel Corporation
4 */
5 #include <net/cfg80211.h>
6 #include "core.h"
7 #include "nl80211.h"
8 #include "rdev-ops.h"
9
pmsr_parse_ftm(struct cfg80211_registered_device * rdev,struct nlattr * ftmreq,struct cfg80211_pmsr_request_peer * out,struct genl_info * info)10 static int pmsr_parse_ftm(struct cfg80211_registered_device *rdev,
11 struct nlattr *ftmreq,
12 struct cfg80211_pmsr_request_peer *out,
13 struct genl_info *info)
14 {
15 const struct cfg80211_pmsr_capabilities *capa = rdev->wiphy.pmsr_capa;
16 struct nlattr *tb[NL80211_PMSR_FTM_REQ_ATTR_MAX + 1];
17 u32 preamble = NL80211_PREAMBLE_DMG; /* only optional in DMG */
18
19 /* validate existing data */
20 if (!(rdev->wiphy.pmsr_capa->ftm.bandwidths & BIT(out->chandef.width))) {
21 NL_SET_ERR_MSG(info->extack, "FTM: unsupported bandwidth");
22 return -EINVAL;
23 }
24
25 /* no validation needed - was already done via nested policy */
26 nla_parse_nested_deprecated(tb, NL80211_PMSR_FTM_REQ_ATTR_MAX, ftmreq,
27 NULL, NULL);
28
29 if (tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE])
30 preamble = nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE]);
31
32 /* set up values - struct is 0-initialized */
33 out->ftm.requested = true;
34
35 switch (out->chandef.chan->band) {
36 case NL80211_BAND_60GHZ:
37 /* optional */
38 break;
39 default:
40 if (!tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE]) {
41 NL_SET_ERR_MSG(info->extack,
42 "FTM: must specify preamble");
43 return -EINVAL;
44 }
45 }
46
47 if (!(capa->ftm.preambles & BIT(preamble))) {
48 NL_SET_ERR_MSG_ATTR(info->extack,
49 tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE],
50 "FTM: invalid preamble");
51 return -EINVAL;
52 }
53
54 out->ftm.preamble = preamble;
55
56 out->ftm.burst_period = 0;
57 if (tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD])
58 out->ftm.burst_period =
59 nla_get_u16(tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD]);
60
61 out->ftm.asap = !!tb[NL80211_PMSR_FTM_REQ_ATTR_ASAP];
62 if (out->ftm.asap && !capa->ftm.asap) {
63 NL_SET_ERR_MSG_ATTR(info->extack,
64 tb[NL80211_PMSR_FTM_REQ_ATTR_ASAP],
65 "FTM: ASAP mode not supported");
66 return -EINVAL;
67 }
68
69 if (!out->ftm.asap && !capa->ftm.non_asap) {
70 NL_SET_ERR_MSG(info->extack,
71 "FTM: non-ASAP mode not supported");
72 return -EINVAL;
73 }
74
75 out->ftm.num_bursts_exp = 0;
76 if (tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP])
77 out->ftm.num_bursts_exp =
78 nla_get_u8(tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP]);
79
80 if (capa->ftm.max_bursts_exponent >= 0 &&
81 out->ftm.num_bursts_exp > capa->ftm.max_bursts_exponent) {
82 NL_SET_ERR_MSG_ATTR(info->extack,
83 tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP],
84 "FTM: max NUM_BURSTS_EXP must be set lower than the device limit");
85 return -EINVAL;
86 }
87
88 out->ftm.ftms_per_burst = 0;
89 if (tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST])
90 out->ftm.ftms_per_burst =
91 nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST]);
92
93 if (capa->ftm.max_ftms_per_burst &&
94 (out->ftm.ftms_per_burst > capa->ftm.max_ftms_per_burst ||
95 out->ftm.ftms_per_burst == 0)) {
96 NL_SET_ERR_MSG_ATTR(info->extack,
97 tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST],
98 "FTM: FTMs per burst must be set lower than the device limit but non-zero");
99 return -EINVAL;
100 }
101
102 out->ftm.ftmr_retries = 3;
103 if (tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES])
104 out->ftm.ftmr_retries =
105 nla_get_u8(tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES]);
106
107 out->ftm.request_lci = !!tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_LCI];
108 if (out->ftm.request_lci && !capa->ftm.request_lci) {
109 NL_SET_ERR_MSG_ATTR(info->extack,
110 tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_LCI],
111 "FTM: LCI request not supported");
112 }
113
114 out->ftm.request_civicloc =
115 !!tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_CIVICLOC];
116 if (out->ftm.request_civicloc && !capa->ftm.request_civicloc) {
117 NL_SET_ERR_MSG_ATTR(info->extack,
118 tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_CIVICLOC],
119 "FTM: civic location request not supported");
120 }
121
122 out->ftm.trigger_based =
123 !!tb[NL80211_PMSR_FTM_REQ_ATTR_TRIGGER_BASED];
124 if (out->ftm.trigger_based && !capa->ftm.trigger_based) {
125 NL_SET_ERR_MSG_ATTR(info->extack,
126 tb[NL80211_PMSR_FTM_REQ_ATTR_TRIGGER_BASED],
127 "FTM: trigger based ranging is not supported");
128 return -EINVAL;
129 }
130
131 out->ftm.non_trigger_based =
132 !!tb[NL80211_PMSR_FTM_REQ_ATTR_NON_TRIGGER_BASED];
133 if (out->ftm.non_trigger_based && !capa->ftm.non_trigger_based) {
134 NL_SET_ERR_MSG_ATTR(info->extack,
135 tb[NL80211_PMSR_FTM_REQ_ATTR_NON_TRIGGER_BASED],
136 "FTM: trigger based ranging is not supported");
137 return -EINVAL;
138 }
139
140 if (out->ftm.trigger_based && out->ftm.non_trigger_based) {
141 NL_SET_ERR_MSG(info->extack,
142 "FTM: can't set both trigger based and non trigger based");
143 return -EINVAL;
144 }
145
146 if (out->ftm.ftms_per_burst > 31 && !out->ftm.non_trigger_based &&
147 !out->ftm.trigger_based) {
148 NL_SET_ERR_MSG_ATTR(info->extack,
149 tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST],
150 "FTM: FTMs per burst must be set lower than 31");
151 return -ERANGE;
152 }
153
154 if ((out->ftm.trigger_based || out->ftm.non_trigger_based) &&
155 out->ftm.preamble != NL80211_PREAMBLE_HE) {
156 NL_SET_ERR_MSG_ATTR(info->extack,
157 tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE],
158 "FTM: non EDCA based ranging must use HE preamble");
159 return -EINVAL;
160 }
161
162 if (tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION])
163 out->ftm.burst_duration =
164 nla_get_u8(tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION]);
165 else if (!out->ftm.non_trigger_based && !out->ftm.trigger_based)
166 out->ftm.burst_duration = 15;
167
168 out->ftm.lmr_feedback =
169 !!tb[NL80211_PMSR_FTM_REQ_ATTR_LMR_FEEDBACK];
170 if (!out->ftm.trigger_based && !out->ftm.non_trigger_based &&
171 out->ftm.lmr_feedback) {
172 NL_SET_ERR_MSG_ATTR(info->extack,
173 tb[NL80211_PMSR_FTM_REQ_ATTR_LMR_FEEDBACK],
174 "FTM: LMR feedback set for EDCA based ranging");
175 return -EINVAL;
176 }
177
178 if (tb[NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR]) {
179 if (!out->ftm.non_trigger_based && !out->ftm.trigger_based) {
180 NL_SET_ERR_MSG_ATTR(info->extack,
181 tb[NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR],
182 "FTM: BSS color set for EDCA based ranging");
183 return -EINVAL;
184 }
185
186 out->ftm.bss_color =
187 nla_get_u8(tb[NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR]);
188 }
189
190 out->ftm.rsta = !!tb[NL80211_PMSR_FTM_REQ_ATTR_RSTA];
191 if (out->ftm.rsta && !capa->ftm.support_rsta) {
192 NL_SET_ERR_MSG_ATTR(info->extack,
193 tb[NL80211_PMSR_FTM_REQ_ATTR_RSTA],
194 "FTM: RSTA not supported by device");
195 return -EOPNOTSUPP;
196 }
197
198 if (out->ftm.rsta && !out->ftm.lmr_feedback) {
199 NL_SET_ERR_MSG_ATTR(info->extack,
200 tb[NL80211_PMSR_FTM_REQ_ATTR_RSTA],
201 "FTM: RSTA set without LMR feedback");
202 return -EINVAL;
203 }
204
205 return 0;
206 }
207
pmsr_parse_peer(struct cfg80211_registered_device * rdev,struct nlattr * peer,struct cfg80211_pmsr_request_peer * out,struct genl_info * info)208 static int pmsr_parse_peer(struct cfg80211_registered_device *rdev,
209 struct nlattr *peer,
210 struct cfg80211_pmsr_request_peer *out,
211 struct genl_info *info)
212 {
213 struct nlattr *tb[NL80211_PMSR_PEER_ATTR_MAX + 1];
214 struct nlattr *req[NL80211_PMSR_REQ_ATTR_MAX + 1];
215 struct nlattr *treq;
216 int err, rem;
217
218 /* no validation needed - was already done via nested policy */
219 nla_parse_nested_deprecated(tb, NL80211_PMSR_PEER_ATTR_MAX, peer,
220 NULL, NULL);
221
222 if (!tb[NL80211_PMSR_PEER_ATTR_ADDR] ||
223 !tb[NL80211_PMSR_PEER_ATTR_CHAN] ||
224 !tb[NL80211_PMSR_PEER_ATTR_REQ]) {
225 NL_SET_ERR_MSG_ATTR(info->extack, peer,
226 "insufficient peer data");
227 return -EINVAL;
228 }
229
230 memcpy(out->addr, nla_data(tb[NL80211_PMSR_PEER_ATTR_ADDR]), ETH_ALEN);
231
232 /* reuse info->attrs */
233 memset(info->attrs, 0, sizeof(*info->attrs) * (NL80211_ATTR_MAX + 1));
234 err = nla_parse_nested_deprecated(info->attrs, NL80211_ATTR_MAX,
235 tb[NL80211_PMSR_PEER_ATTR_CHAN],
236 NULL, info->extack);
237 if (err)
238 return err;
239
240 err = nl80211_parse_chandef(rdev, info, &out->chandef);
241 if (err)
242 return err;
243
244 /* no validation needed - was already done via nested policy */
245 nla_parse_nested_deprecated(req, NL80211_PMSR_REQ_ATTR_MAX,
246 tb[NL80211_PMSR_PEER_ATTR_REQ], NULL,
247 NULL);
248
249 if (!req[NL80211_PMSR_REQ_ATTR_DATA]) {
250 NL_SET_ERR_MSG_ATTR(info->extack,
251 tb[NL80211_PMSR_PEER_ATTR_REQ],
252 "missing request type/data");
253 return -EINVAL;
254 }
255
256 if (req[NL80211_PMSR_REQ_ATTR_GET_AP_TSF])
257 out->report_ap_tsf = true;
258
259 if (out->report_ap_tsf && !rdev->wiphy.pmsr_capa->report_ap_tsf) {
260 NL_SET_ERR_MSG_ATTR(info->extack,
261 req[NL80211_PMSR_REQ_ATTR_GET_AP_TSF],
262 "reporting AP TSF is not supported");
263 return -EINVAL;
264 }
265
266 nla_for_each_nested(treq, req[NL80211_PMSR_REQ_ATTR_DATA], rem) {
267 switch (nla_type(treq)) {
268 case NL80211_PMSR_TYPE_FTM:
269 err = pmsr_parse_ftm(rdev, treq, out, info);
270 break;
271 default:
272 NL_SET_ERR_MSG_ATTR(info->extack, treq,
273 "unsupported measurement type");
274 err = -EINVAL;
275 }
276 }
277
278 if (err)
279 return err;
280
281 return 0;
282 }
283
nl80211_pmsr_start(struct sk_buff * skb,struct genl_info * info)284 int nl80211_pmsr_start(struct sk_buff *skb, struct genl_info *info)
285 {
286 struct nlattr *reqattr = info->attrs[NL80211_ATTR_PEER_MEASUREMENTS];
287 struct cfg80211_registered_device *rdev = info->user_ptr[0];
288 struct wireless_dev *wdev = info->user_ptr[1];
289 struct cfg80211_pmsr_request *req;
290 struct nlattr *peers, *peer;
291 int count, rem, err, idx;
292
293 if (!rdev->wiphy.pmsr_capa)
294 return -EOPNOTSUPP;
295
296 if (!reqattr)
297 return -EINVAL;
298
299 peers = nla_find(nla_data(reqattr), nla_len(reqattr),
300 NL80211_PMSR_ATTR_PEERS);
301 if (!peers)
302 return -EINVAL;
303
304 count = 0;
305 nla_for_each_nested(peer, peers, rem) {
306 count++;
307
308 if (count > rdev->wiphy.pmsr_capa->max_peers) {
309 NL_SET_ERR_MSG_ATTR(info->extack, peer,
310 "Too many peers used");
311 return -EINVAL;
312 }
313 }
314
315 req = kzalloc_flex(*req, peers, count);
316 if (!req)
317 return -ENOMEM;
318 req->n_peers = count;
319
320 if (info->attrs[NL80211_ATTR_TIMEOUT])
321 req->timeout = nla_get_u32(info->attrs[NL80211_ATTR_TIMEOUT]);
322
323 if (info->attrs[NL80211_ATTR_MAC]) {
324 if (!rdev->wiphy.pmsr_capa->randomize_mac_addr) {
325 NL_SET_ERR_MSG_ATTR(info->extack,
326 info->attrs[NL80211_ATTR_MAC],
327 "device cannot randomize MAC address");
328 err = -EINVAL;
329 goto out_err;
330 }
331
332 err = nl80211_parse_random_mac(info->attrs, req->mac_addr,
333 req->mac_addr_mask);
334 if (err)
335 goto out_err;
336 } else {
337 memcpy(req->mac_addr, wdev_address(wdev), ETH_ALEN);
338 eth_broadcast_addr(req->mac_addr_mask);
339 }
340
341 idx = 0;
342 nla_for_each_nested(peer, peers, rem) {
343 /* NB: this reuses info->attrs, but we no longer need it */
344 err = pmsr_parse_peer(rdev, peer, &req->peers[idx], info);
345 if (err)
346 goto out_err;
347 idx++;
348 }
349 req->cookie = cfg80211_assign_cookie(rdev);
350 req->nl_portid = info->snd_portid;
351
352 err = rdev_start_pmsr(rdev, wdev, req);
353 if (err)
354 goto out_err;
355
356 list_add_tail(&req->list, &wdev->pmsr_list);
357
358 nl_set_extack_cookie_u64(info->extack, req->cookie);
359 return 0;
360 out_err:
361 kfree(req);
362 return err;
363 }
364
cfg80211_pmsr_complete(struct wireless_dev * wdev,struct cfg80211_pmsr_request * req,gfp_t gfp)365 void cfg80211_pmsr_complete(struct wireless_dev *wdev,
366 struct cfg80211_pmsr_request *req,
367 gfp_t gfp)
368 {
369 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
370 struct cfg80211_pmsr_request *tmp, *prev, *to_free = NULL;
371 struct sk_buff *msg;
372 void *hdr;
373
374 trace_cfg80211_pmsr_complete(wdev->wiphy, wdev, req->cookie);
375
376 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
377 if (!msg)
378 goto free_request;
379
380 hdr = nl80211hdr_put(msg, 0, 0, 0,
381 NL80211_CMD_PEER_MEASUREMENT_COMPLETE);
382 if (!hdr)
383 goto free_msg;
384
385 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
386 nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
387 NL80211_ATTR_PAD))
388 goto free_msg;
389
390 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->cookie,
391 NL80211_ATTR_PAD))
392 goto free_msg;
393
394 genlmsg_end(msg, hdr);
395 genlmsg_unicast(wiphy_net(wdev->wiphy), msg, req->nl_portid);
396 goto free_request;
397 free_msg:
398 nlmsg_free(msg);
399 free_request:
400 spin_lock_bh(&wdev->pmsr_lock);
401 /*
402 * cfg80211_pmsr_process_abort() may have already moved this request
403 * to the free list, and will free it later. In this case, don't free
404 * it here.
405 */
406 list_for_each_entry_safe(tmp, prev, &wdev->pmsr_list, list) {
407 if (tmp == req) {
408 list_del(&req->list);
409 to_free = req;
410 break;
411 }
412 }
413 spin_unlock_bh(&wdev->pmsr_lock);
414 kfree(to_free);
415 }
416 EXPORT_SYMBOL_GPL(cfg80211_pmsr_complete);
417
nl80211_pmsr_send_ftm_res(struct sk_buff * msg,struct cfg80211_pmsr_result * res)418 static int nl80211_pmsr_send_ftm_res(struct sk_buff *msg,
419 struct cfg80211_pmsr_result *res)
420 {
421 if (res->status == NL80211_PMSR_STATUS_FAILURE) {
422 if (nla_put_u32(msg, NL80211_PMSR_FTM_RESP_ATTR_FAIL_REASON,
423 res->ftm.failure_reason))
424 goto error;
425
426 if (res->ftm.failure_reason ==
427 NL80211_PMSR_FTM_FAILURE_PEER_BUSY &&
428 res->ftm.busy_retry_time &&
429 nla_put_u32(msg, NL80211_PMSR_FTM_RESP_ATTR_BUSY_RETRY_TIME,
430 res->ftm.busy_retry_time))
431 goto error;
432
433 return 0;
434 }
435
436 #define PUT(tp, attr, val) \
437 do { \
438 if (nla_put_##tp(msg, \
439 NL80211_PMSR_FTM_RESP_ATTR_##attr, \
440 res->ftm.val)) \
441 goto error; \
442 } while (0)
443
444 #define PUTOPT(tp, attr, val) \
445 do { \
446 if (res->ftm.val##_valid) \
447 PUT(tp, attr, val); \
448 } while (0)
449
450 #define PUT_U64(attr, val) \
451 do { \
452 if (nla_put_u64_64bit(msg, \
453 NL80211_PMSR_FTM_RESP_ATTR_##attr,\
454 res->ftm.val, \
455 NL80211_PMSR_FTM_RESP_ATTR_PAD)) \
456 goto error; \
457 } while (0)
458
459 #define PUTOPT_U64(attr, val) \
460 do { \
461 if (res->ftm.val##_valid) \
462 PUT_U64(attr, val); \
463 } while (0)
464
465 if (res->ftm.burst_index >= 0)
466 PUT(u32, BURST_INDEX, burst_index);
467 PUTOPT(u32, NUM_FTMR_ATTEMPTS, num_ftmr_attempts);
468 PUTOPT(u32, NUM_FTMR_SUCCESSES, num_ftmr_successes);
469 PUT(u8, NUM_BURSTS_EXP, num_bursts_exp);
470 PUT(u8, BURST_DURATION, burst_duration);
471 PUT(u8, FTMS_PER_BURST, ftms_per_burst);
472 PUT(u16, BURST_PERIOD, burst_period);
473 PUTOPT(s32, RSSI_AVG, rssi_avg);
474 PUTOPT(s32, RSSI_SPREAD, rssi_spread);
475 if (res->ftm.tx_rate_valid &&
476 !nl80211_put_sta_rate(msg, &res->ftm.tx_rate,
477 NL80211_PMSR_FTM_RESP_ATTR_TX_RATE))
478 goto error;
479 if (res->ftm.rx_rate_valid &&
480 !nl80211_put_sta_rate(msg, &res->ftm.rx_rate,
481 NL80211_PMSR_FTM_RESP_ATTR_RX_RATE))
482 goto error;
483 PUTOPT_U64(RTT_AVG, rtt_avg);
484 PUTOPT_U64(RTT_VARIANCE, rtt_variance);
485 PUTOPT_U64(RTT_SPREAD, rtt_spread);
486 PUTOPT_U64(DIST_AVG, dist_avg);
487 PUTOPT_U64(DIST_VARIANCE, dist_variance);
488 PUTOPT_U64(DIST_SPREAD, dist_spread);
489 if (res->ftm.lci && res->ftm.lci_len &&
490 nla_put(msg, NL80211_PMSR_FTM_RESP_ATTR_LCI,
491 res->ftm.lci_len, res->ftm.lci))
492 goto error;
493 if (res->ftm.civicloc && res->ftm.civicloc_len &&
494 nla_put(msg, NL80211_PMSR_FTM_RESP_ATTR_CIVICLOC,
495 res->ftm.civicloc_len, res->ftm.civicloc))
496 goto error;
497 #undef PUT
498 #undef PUTOPT
499 #undef PUT_U64
500 #undef PUTOPT_U64
501
502 return 0;
503 error:
504 return -ENOSPC;
505 }
506
nl80211_pmsr_send_result(struct sk_buff * msg,struct cfg80211_pmsr_result * res)507 static int nl80211_pmsr_send_result(struct sk_buff *msg,
508 struct cfg80211_pmsr_result *res)
509 {
510 struct nlattr *pmsr, *peers, *peer, *resp, *data, *typedata;
511
512 pmsr = nla_nest_start_noflag(msg, NL80211_ATTR_PEER_MEASUREMENTS);
513 if (!pmsr)
514 goto error;
515
516 peers = nla_nest_start_noflag(msg, NL80211_PMSR_ATTR_PEERS);
517 if (!peers)
518 goto error;
519
520 peer = nla_nest_start_noflag(msg, 1);
521 if (!peer)
522 goto error;
523
524 if (nla_put(msg, NL80211_PMSR_PEER_ATTR_ADDR, ETH_ALEN, res->addr))
525 goto error;
526
527 resp = nla_nest_start_noflag(msg, NL80211_PMSR_PEER_ATTR_RESP);
528 if (!resp)
529 goto error;
530
531 if (nla_put_u32(msg, NL80211_PMSR_RESP_ATTR_STATUS, res->status) ||
532 nla_put_u64_64bit(msg, NL80211_PMSR_RESP_ATTR_HOST_TIME,
533 res->host_time, NL80211_PMSR_RESP_ATTR_PAD))
534 goto error;
535
536 if (res->ap_tsf_valid &&
537 nla_put_u64_64bit(msg, NL80211_PMSR_RESP_ATTR_AP_TSF,
538 res->ap_tsf, NL80211_PMSR_RESP_ATTR_PAD))
539 goto error;
540
541 if (res->final && nla_put_flag(msg, NL80211_PMSR_RESP_ATTR_FINAL))
542 goto error;
543
544 data = nla_nest_start_noflag(msg, NL80211_PMSR_RESP_ATTR_DATA);
545 if (!data)
546 goto error;
547
548 typedata = nla_nest_start_noflag(msg, res->type);
549 if (!typedata)
550 goto error;
551
552 switch (res->type) {
553 case NL80211_PMSR_TYPE_FTM:
554 if (nl80211_pmsr_send_ftm_res(msg, res))
555 goto error;
556 break;
557 default:
558 WARN_ON(1);
559 }
560
561 nla_nest_end(msg, typedata);
562 nla_nest_end(msg, data);
563 nla_nest_end(msg, resp);
564 nla_nest_end(msg, peer);
565 nla_nest_end(msg, peers);
566 nla_nest_end(msg, pmsr);
567
568 return 0;
569 error:
570 return -ENOSPC;
571 }
572
cfg80211_pmsr_report(struct wireless_dev * wdev,struct cfg80211_pmsr_request * req,struct cfg80211_pmsr_result * result,gfp_t gfp)573 void cfg80211_pmsr_report(struct wireless_dev *wdev,
574 struct cfg80211_pmsr_request *req,
575 struct cfg80211_pmsr_result *result,
576 gfp_t gfp)
577 {
578 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
579 struct sk_buff *msg;
580 void *hdr;
581 int err;
582
583 trace_cfg80211_pmsr_report(wdev->wiphy, wdev, req->cookie,
584 result->addr);
585
586 /*
587 * Currently, only variable items are LCI and civic location,
588 * both of which are reasonably short so we don't need to
589 * worry about them here for the allocation.
590 */
591 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
592 if (!msg)
593 return;
594
595 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PEER_MEASUREMENT_RESULT);
596 if (!hdr)
597 goto free;
598
599 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
600 nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
601 NL80211_ATTR_PAD))
602 goto free;
603
604 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->cookie,
605 NL80211_ATTR_PAD))
606 goto free;
607
608 err = nl80211_pmsr_send_result(msg, result);
609 if (err) {
610 pr_err_ratelimited("peer measurement result: message didn't fit!");
611 goto free;
612 }
613
614 genlmsg_end(msg, hdr);
615 genlmsg_unicast(wiphy_net(wdev->wiphy), msg, req->nl_portid);
616 return;
617 free:
618 nlmsg_free(msg);
619 }
620 EXPORT_SYMBOL_GPL(cfg80211_pmsr_report);
621
cfg80211_pmsr_process_abort(struct wireless_dev * wdev)622 static void cfg80211_pmsr_process_abort(struct wireless_dev *wdev)
623 {
624 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
625 struct cfg80211_pmsr_request *req, *tmp;
626 LIST_HEAD(free_list);
627
628 lockdep_assert_wiphy(wdev->wiphy);
629
630 spin_lock_bh(&wdev->pmsr_lock);
631 list_for_each_entry_safe(req, tmp, &wdev->pmsr_list, list) {
632 if (req->nl_portid)
633 continue;
634 list_move_tail(&req->list, &free_list);
635 }
636 spin_unlock_bh(&wdev->pmsr_lock);
637
638 list_for_each_entry_safe(req, tmp, &free_list, list) {
639 rdev_abort_pmsr(rdev, wdev, req);
640
641 kfree(req);
642 }
643 }
644
cfg80211_pmsr_free_wk(struct work_struct * work)645 void cfg80211_pmsr_free_wk(struct work_struct *work)
646 {
647 struct wireless_dev *wdev = container_of(work, struct wireless_dev,
648 pmsr_free_wk);
649
650 guard(wiphy)(wdev->wiphy);
651
652 cfg80211_pmsr_process_abort(wdev);
653 }
654
cfg80211_pmsr_wdev_down(struct wireless_dev * wdev)655 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev)
656 {
657 struct cfg80211_pmsr_request *req;
658 bool found = false;
659
660 spin_lock_bh(&wdev->pmsr_lock);
661 list_for_each_entry(req, &wdev->pmsr_list, list) {
662 found = true;
663 req->nl_portid = 0;
664 }
665 spin_unlock_bh(&wdev->pmsr_lock);
666
667 if (found)
668 cfg80211_pmsr_process_abort(wdev);
669
670 WARN_ON(!list_empty(&wdev->pmsr_list));
671 }
672
cfg80211_release_pmsr(struct wireless_dev * wdev,u32 portid)673 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid)
674 {
675 struct cfg80211_pmsr_request *req;
676
677 spin_lock_bh(&wdev->pmsr_lock);
678 list_for_each_entry(req, &wdev->pmsr_list, list) {
679 if (req->nl_portid == portid) {
680 req->nl_portid = 0;
681 schedule_work(&wdev->pmsr_free_wk);
682 }
683 }
684 spin_unlock_bh(&wdev->pmsr_lock);
685 }
686