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