1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2017 Intel Deutschland GmbH 8 * Copyright (C) 2018-2023 Intel Corporation 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/fips.h> 14 #include <linux/init.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/etherdevice.h> 20 #include <linux/if_arp.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/bitmap.h> 23 #include <linux/inetdevice.h> 24 #include <net/net_namespace.h> 25 #include <net/dropreason.h> 26 #include <net/cfg80211.h> 27 #include <net/addrconf.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "mesh.h" 33 #include "wep.h" 34 #include "led.h" 35 #include "debugfs.h" 36 37 void ieee80211_configure_filter(struct ieee80211_local *local) 38 { 39 u64 mc; 40 unsigned int changed_flags; 41 unsigned int new_flags = 0; 42 43 if (atomic_read(&local->iff_allmultis)) 44 new_flags |= FIF_ALLMULTI; 45 46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 48 new_flags |= FIF_BCN_PRBRESP_PROMISC; 49 50 if (local->fif_probe_req || local->probe_req_reg) 51 new_flags |= FIF_PROBE_REQ; 52 53 if (local->fif_fcsfail) 54 new_flags |= FIF_FCSFAIL; 55 56 if (local->fif_plcpfail) 57 new_flags |= FIF_PLCPFAIL; 58 59 if (local->fif_control) 60 new_flags |= FIF_CONTROL; 61 62 if (local->fif_other_bss) 63 new_flags |= FIF_OTHER_BSS; 64 65 if (local->fif_pspoll) 66 new_flags |= FIF_PSPOLL; 67 68 if (local->rx_mcast_action_reg) 69 new_flags |= FIF_MCAST_ACTION; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85 } 86 87 static void ieee80211_reconfig_filter(struct wiphy *wiphy, 88 struct wiphy_work *work) 89 { 90 struct ieee80211_local *local = 91 container_of(work, struct ieee80211_local, reconfig_filter); 92 93 ieee80211_configure_filter(local); 94 } 95 96 static u32 ieee80211_calc_hw_conf_chan(struct ieee80211_local *local, 97 struct ieee80211_chanctx_conf *ctx) 98 { 99 struct ieee80211_sub_if_data *sdata; 100 struct cfg80211_chan_def chandef = {}; 101 struct cfg80211_chan_def *oper = NULL; 102 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_STATIC; 103 u32 changed = 0; 104 int power; 105 u32 offchannel_flag; 106 107 if (!local->emulate_chanctx) 108 return 0; 109 110 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 111 112 if (ctx && !WARN_ON(!ctx->def.chan)) { 113 oper = &ctx->def; 114 if (ctx->rx_chains_static > 1) 115 smps_mode = IEEE80211_SMPS_OFF; 116 else if (ctx->rx_chains_dynamic > 1) 117 smps_mode = IEEE80211_SMPS_DYNAMIC; 118 else 119 smps_mode = IEEE80211_SMPS_STATIC; 120 } 121 122 if (local->scan_chandef.chan) { 123 chandef = local->scan_chandef; 124 } else if (local->tmp_channel) { 125 chandef.chan = local->tmp_channel; 126 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 127 chandef.center_freq1 = chandef.chan->center_freq; 128 chandef.freq1_offset = chandef.chan->freq_offset; 129 } else if (oper) { 130 chandef = *oper; 131 } else { 132 chandef = local->dflt_chandef; 133 } 134 135 if (WARN(!cfg80211_chandef_valid(&chandef), 136 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 137 chandef.chan ? chandef.chan->center_freq : -1, 138 chandef.chan ? chandef.chan->freq_offset : 0, 139 chandef.width, chandef.center_freq1, chandef.freq1_offset, 140 chandef.center_freq2)) 141 return 0; 142 143 if (!oper || !cfg80211_chandef_identical(&chandef, oper)) 144 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 145 else 146 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 147 148 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 149 150 /* force it also for scanning, since drivers might config differently */ 151 if (offchannel_flag || local->scanning || local->in_reconfig || 152 !cfg80211_chandef_identical(&local->hw.conf.chandef, &chandef)) { 153 local->hw.conf.chandef = chandef; 154 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 155 } 156 157 if (!conf_is_ht(&local->hw.conf)) { 158 /* 159 * mac80211.h documents that this is only valid 160 * when the channel is set to an HT type, and 161 * that otherwise STATIC is used. 162 */ 163 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 164 } else if (local->hw.conf.smps_mode != smps_mode) { 165 local->hw.conf.smps_mode = smps_mode; 166 changed |= IEEE80211_CONF_CHANGE_SMPS; 167 } 168 169 power = ieee80211_chandef_max_power(&chandef); 170 if (local->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 171 power = min(local->user_power_level, power); 172 173 rcu_read_lock(); 174 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 175 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf)) 176 continue; 177 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 178 continue; 179 if (sdata->vif.bss_conf.txpower == INT_MIN) 180 continue; 181 power = min(power, sdata->vif.bss_conf.txpower); 182 } 183 rcu_read_unlock(); 184 185 if (local->hw.conf.power_level != power) { 186 changed |= IEEE80211_CONF_CHANGE_POWER; 187 local->hw.conf.power_level = power; 188 } 189 190 return changed; 191 } 192 193 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 194 { 195 int ret = 0; 196 197 might_sleep(); 198 199 WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL | 200 IEEE80211_CONF_CHANGE_POWER | 201 IEEE80211_CONF_CHANGE_SMPS)); 202 203 if (changed && local->open_count) { 204 ret = drv_config(local, changed); 205 /* 206 * Goal: 207 * HW reconfiguration should never fail, the driver has told 208 * us what it can support so it should live up to that promise. 209 * 210 * Current status: 211 * rfkill is not integrated with mac80211 and a 212 * configuration command can thus fail if hardware rfkill 213 * is enabled 214 * 215 * FIXME: integrate rfkill with mac80211 and then add this 216 * WARN_ON() back 217 * 218 */ 219 /* WARN_ON(ret); */ 220 } 221 222 return ret; 223 } 224 225 /* for scanning, offchannel and chanctx emulation only */ 226 static int _ieee80211_hw_conf_chan(struct ieee80211_local *local, 227 struct ieee80211_chanctx_conf *ctx) 228 { 229 u32 changed; 230 231 if (!local->open_count) 232 return 0; 233 234 changed = ieee80211_calc_hw_conf_chan(local, ctx); 235 if (!changed) 236 return 0; 237 238 return drv_config(local, changed); 239 } 240 241 int ieee80211_hw_conf_chan(struct ieee80211_local *local) 242 { 243 struct ieee80211_chanctx *ctx; 244 245 ctx = list_first_entry_or_null(&local->chanctx_list, 246 struct ieee80211_chanctx, 247 list); 248 249 return _ieee80211_hw_conf_chan(local, ctx ? &ctx->conf : NULL); 250 } 251 252 void ieee80211_hw_conf_init(struct ieee80211_local *local) 253 { 254 u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL | 255 IEEE80211_CONF_CHANGE_POWER | 256 IEEE80211_CONF_CHANGE_SMPS); 257 258 if (WARN_ON(!local->open_count)) 259 return; 260 261 if (local->emulate_chanctx) { 262 struct ieee80211_chanctx *ctx; 263 264 ctx = list_first_entry_or_null(&local->chanctx_list, 265 struct ieee80211_chanctx, 266 list); 267 268 changed |= ieee80211_calc_hw_conf_chan(local, 269 ctx ? &ctx->conf : NULL); 270 } 271 272 WARN_ON(drv_config(local, changed)); 273 } 274 275 int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw, 276 struct ieee80211_chanctx_conf *ctx) 277 { 278 struct ieee80211_local *local = hw_to_local(hw); 279 280 local->hw.conf.radar_enabled = ctx->radar_enabled; 281 282 return _ieee80211_hw_conf_chan(local, ctx); 283 } 284 EXPORT_SYMBOL(ieee80211_emulate_add_chanctx); 285 286 void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw, 287 struct ieee80211_chanctx_conf *ctx) 288 { 289 struct ieee80211_local *local = hw_to_local(hw); 290 291 local->hw.conf.radar_enabled = false; 292 293 _ieee80211_hw_conf_chan(local, NULL); 294 } 295 EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx); 296 297 void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw, 298 struct ieee80211_chanctx_conf *ctx, 299 u32 changed) 300 { 301 struct ieee80211_local *local = hw_to_local(hw); 302 303 local->hw.conf.radar_enabled = ctx->radar_enabled; 304 305 _ieee80211_hw_conf_chan(local, ctx); 306 } 307 EXPORT_SYMBOL(ieee80211_emulate_change_chanctx); 308 309 int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw, 310 struct ieee80211_vif_chanctx_switch *vifs, 311 int n_vifs, 312 enum ieee80211_chanctx_switch_mode mode) 313 { 314 struct ieee80211_local *local = hw_to_local(hw); 315 316 if (n_vifs <= 0) 317 return -EINVAL; 318 319 local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled; 320 _ieee80211_hw_conf_chan(local, vifs[0].new_ctx); 321 322 return 0; 323 } 324 EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx); 325 326 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\ 327 BSS_CHANGED_IDLE |\ 328 BSS_CHANGED_PS |\ 329 BSS_CHANGED_IBSS |\ 330 BSS_CHANGED_ARP_FILTER |\ 331 BSS_CHANGED_SSID |\ 332 BSS_CHANGED_MLD_VALID_LINKS |\ 333 BSS_CHANGED_MLD_TTLM) 334 335 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 336 u64 changed) 337 { 338 struct ieee80211_local *local = sdata->local; 339 340 might_sleep(); 341 342 WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif)); 343 344 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 345 return; 346 347 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 348 BSS_CHANGED_BEACON_ENABLED) && 349 sdata->vif.type != NL80211_IFTYPE_AP && 350 sdata->vif.type != NL80211_IFTYPE_ADHOC && 351 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 352 sdata->vif.type != NL80211_IFTYPE_OCB)) 353 return; 354 355 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 356 sdata->vif.type == NL80211_IFTYPE_NAN || 357 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 358 !sdata->vif.bss_conf.mu_mimo_owner && 359 !(changed & BSS_CHANGED_TXPOWER)))) 360 return; 361 362 if (!check_sdata_in_driver(sdata)) 363 return; 364 365 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 366 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 367 368 trace_drv_vif_cfg_changed(local, sdata, changed); 369 if (local->ops->vif_cfg_changed) 370 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 371 } 372 373 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 374 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 375 376 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf, 377 changed); 378 if (local->ops->link_info_changed) 379 local->ops->link_info_changed(&local->hw, &sdata->vif, 380 &sdata->vif.bss_conf, ch); 381 } 382 383 if (local->ops->bss_info_changed) 384 local->ops->bss_info_changed(&local->hw, &sdata->vif, 385 &sdata->vif.bss_conf, changed); 386 trace_drv_return_void(local); 387 } 388 389 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 390 u64 changed) 391 { 392 struct ieee80211_local *local = sdata->local; 393 394 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 395 396 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 397 return; 398 399 drv_vif_cfg_changed(local, sdata, changed); 400 } 401 402 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 403 struct ieee80211_link_data *link, 404 u64 changed) 405 { 406 struct ieee80211_local *local = sdata->local; 407 408 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 409 410 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 411 return; 412 413 if (!check_sdata_in_driver(sdata)) 414 return; 415 416 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 417 } 418 419 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 420 { 421 sdata->vif.bss_conf.use_cts_prot = false; 422 sdata->vif.bss_conf.use_short_preamble = false; 423 sdata->vif.bss_conf.use_short_slot = false; 424 return BSS_CHANGED_ERP_CTS_PROT | 425 BSS_CHANGED_ERP_PREAMBLE | 426 BSS_CHANGED_ERP_SLOT; 427 } 428 429 /* context: requires softirqs disabled */ 430 void ieee80211_handle_queued_frames(struct ieee80211_local *local) 431 { 432 struct sk_buff *skb; 433 434 while ((skb = skb_dequeue(&local->skb_queue)) || 435 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 436 switch (skb->pkt_type) { 437 case IEEE80211_RX_MSG: 438 /* Clear skb->pkt_type in order to not confuse kernel 439 * netstack. */ 440 skb->pkt_type = 0; 441 ieee80211_rx(&local->hw, skb); 442 break; 443 case IEEE80211_TX_STATUS_MSG: 444 skb->pkt_type = 0; 445 ieee80211_tx_status_skb(&local->hw, skb); 446 break; 447 default: 448 WARN(1, "mac80211: Packet is of unknown type %d\n", 449 skb->pkt_type); 450 dev_kfree_skb(skb); 451 break; 452 } 453 } 454 } 455 456 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 457 { 458 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 459 460 ieee80211_handle_queued_frames(local); 461 } 462 463 static void ieee80211_restart_work(struct work_struct *work) 464 { 465 struct ieee80211_local *local = 466 container_of(work, struct ieee80211_local, restart_work); 467 struct ieee80211_sub_if_data *sdata; 468 int ret; 469 470 flush_workqueue(local->workqueue); 471 472 rtnl_lock(); 473 /* we might do interface manipulations, so need both */ 474 wiphy_lock(local->hw.wiphy); 475 wiphy_work_flush(local->hw.wiphy, NULL); 476 477 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 478 "%s called with hardware scan in progress\n", __func__); 479 480 list_for_each_entry(sdata, &local->interfaces, list) { 481 /* 482 * XXX: there may be more work for other vif types and even 483 * for station mode: a good thing would be to run most of 484 * the iface type's dependent _stop (ieee80211_mg_stop, 485 * ieee80211_ibss_stop) etc... 486 * For now, fix only the specific bug that was seen: race 487 * between csa_connection_drop_work and us. 488 */ 489 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 490 /* 491 * This worker is scheduled from the iface worker that 492 * runs on mac80211's workqueue, so we can't be 493 * scheduling this worker after the cancel right here. 494 * The exception is ieee80211_chswitch_done. 495 * Then we can have a race... 496 */ 497 wiphy_work_cancel(local->hw.wiphy, 498 &sdata->u.mgd.csa_connection_drop_work); 499 if (sdata->vif.bss_conf.csa_active) 500 ieee80211_sta_connection_lost(sdata, 501 WLAN_REASON_UNSPECIFIED, 502 false); 503 } 504 wiphy_delayed_work_flush(local->hw.wiphy, 505 &sdata->dec_tailroom_needed_wk); 506 } 507 ieee80211_scan_cancel(local); 508 509 /* make sure any new ROC will consider local->in_reconfig */ 510 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work); 511 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done); 512 513 /* wait for all packet processing to be done */ 514 synchronize_net(); 515 516 ret = ieee80211_reconfig(local); 517 wiphy_unlock(local->hw.wiphy); 518 519 if (ret) 520 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 521 522 rtnl_unlock(); 523 } 524 525 void ieee80211_restart_hw(struct ieee80211_hw *hw) 526 { 527 struct ieee80211_local *local = hw_to_local(hw); 528 529 trace_api_restart_hw(local); 530 531 wiphy_info(hw->wiphy, 532 "Hardware restart was requested\n"); 533 534 /* use this reason, ieee80211_reconfig will unblock it */ 535 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 536 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 537 false); 538 539 /* 540 * Stop all Rx during the reconfig. We don't want state changes 541 * or driver callbacks while this is in progress. 542 */ 543 local->in_reconfig = true; 544 barrier(); 545 546 queue_work(system_freezable_wq, &local->restart_work); 547 } 548 EXPORT_SYMBOL(ieee80211_restart_hw); 549 550 #ifdef CONFIG_INET 551 static int ieee80211_ifa_changed(struct notifier_block *nb, 552 unsigned long data, void *arg) 553 { 554 struct in_ifaddr *ifa = arg; 555 struct ieee80211_local *local = 556 container_of(nb, struct ieee80211_local, 557 ifa_notifier); 558 struct net_device *ndev = ifa->ifa_dev->dev; 559 struct wireless_dev *wdev = ndev->ieee80211_ptr; 560 struct in_device *idev; 561 struct ieee80211_sub_if_data *sdata; 562 struct ieee80211_vif_cfg *vif_cfg; 563 struct ieee80211_if_managed *ifmgd; 564 int c = 0; 565 566 /* Make sure it's our interface that got changed */ 567 if (!wdev) 568 return NOTIFY_DONE; 569 570 if (wdev->wiphy != local->hw.wiphy || !wdev->registered) 571 return NOTIFY_DONE; 572 573 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 574 vif_cfg = &sdata->vif.cfg; 575 576 /* ARP filtering is only supported in managed mode */ 577 if (sdata->vif.type != NL80211_IFTYPE_STATION) 578 return NOTIFY_DONE; 579 580 idev = __in_dev_get_rtnl(sdata->dev); 581 if (!idev) 582 return NOTIFY_DONE; 583 584 ifmgd = &sdata->u.mgd; 585 586 /* 587 * The nested here is needed to convince lockdep that this is 588 * all OK. Yes, we lock the wiphy mutex here while we already 589 * hold the notifier rwsem, that's the normal case. And yes, 590 * we also acquire the notifier rwsem again when unregistering 591 * a netdev while we already hold the wiphy mutex, so it does 592 * look like a typical ABBA deadlock. 593 * 594 * However, both of these things happen with the RTNL held 595 * already. Therefore, they can't actually happen, since the 596 * lock orders really are ABC and ACB, which is fine due to 597 * the RTNL (A). 598 * 599 * We still need to prevent recursion, which is accomplished 600 * by the !wdev->registered check above. 601 */ 602 mutex_lock_nested(&local->hw.wiphy->mtx, 1); 603 __acquire(&local->hw.wiphy->mtx); 604 605 /* Copy the addresses to the vif config list */ 606 ifa = rtnl_dereference(idev->ifa_list); 607 while (ifa) { 608 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 609 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 610 ifa = rtnl_dereference(ifa->ifa_next); 611 c++; 612 } 613 614 vif_cfg->arp_addr_cnt = c; 615 616 /* Configure driver only if associated (which also implies it is up) */ 617 if (ifmgd->associated) 618 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 619 620 wiphy_unlock(local->hw.wiphy); 621 622 return NOTIFY_OK; 623 } 624 #endif 625 626 #if IS_ENABLED(CONFIG_IPV6) 627 static int ieee80211_ifa6_changed(struct notifier_block *nb, 628 unsigned long data, void *arg) 629 { 630 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 631 struct inet6_dev *idev = ifa->idev; 632 struct net_device *ndev = ifa->idev->dev; 633 struct ieee80211_local *local = 634 container_of(nb, struct ieee80211_local, ifa6_notifier); 635 struct wireless_dev *wdev = ndev->ieee80211_ptr; 636 struct ieee80211_sub_if_data *sdata; 637 638 /* Make sure it's our interface that got changed */ 639 if (!wdev || wdev->wiphy != local->hw.wiphy) 640 return NOTIFY_DONE; 641 642 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 643 644 /* 645 * For now only support station mode. This is mostly because 646 * doing AP would have to handle AP_VLAN in some way ... 647 */ 648 if (sdata->vif.type != NL80211_IFTYPE_STATION) 649 return NOTIFY_DONE; 650 651 drv_ipv6_addr_change(local, sdata, idev); 652 653 return NOTIFY_OK; 654 } 655 #endif 656 657 /* There isn't a lot of sense in it, but you can transmit anything you like */ 658 static const struct ieee80211_txrx_stypes 659 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 660 [NL80211_IFTYPE_ADHOC] = { 661 .tx = 0xffff, 662 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 663 BIT(IEEE80211_STYPE_AUTH >> 4) | 664 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 665 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 666 }, 667 [NL80211_IFTYPE_STATION] = { 668 .tx = 0xffff, 669 /* 670 * To support Pre Association Security Negotiation (PASN) while 671 * already associated to one AP, allow user space to register to 672 * Rx authentication frames, so that the user space logic would 673 * be able to receive/handle authentication frames from a 674 * different AP as part of PASN. 675 * It is expected that user space would intelligently register 676 * for Rx authentication frames, i.e., only when PASN is used 677 * and configure a match filter only for PASN authentication 678 * algorithm, as otherwise the MLME functionality of mac80211 679 * would be broken. 680 */ 681 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 682 BIT(IEEE80211_STYPE_AUTH >> 4) | 683 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 684 }, 685 [NL80211_IFTYPE_AP] = { 686 .tx = 0xffff, 687 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 688 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 689 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 690 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 691 BIT(IEEE80211_STYPE_AUTH >> 4) | 692 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 693 BIT(IEEE80211_STYPE_ACTION >> 4), 694 }, 695 [NL80211_IFTYPE_AP_VLAN] = { 696 /* copy AP */ 697 .tx = 0xffff, 698 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 699 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 700 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 701 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 702 BIT(IEEE80211_STYPE_AUTH >> 4) | 703 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 704 BIT(IEEE80211_STYPE_ACTION >> 4), 705 }, 706 [NL80211_IFTYPE_P2P_CLIENT] = { 707 .tx = 0xffff, 708 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 709 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 710 }, 711 [NL80211_IFTYPE_P2P_GO] = { 712 .tx = 0xffff, 713 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 714 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 715 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 716 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 717 BIT(IEEE80211_STYPE_AUTH >> 4) | 718 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 719 BIT(IEEE80211_STYPE_ACTION >> 4), 720 }, 721 [NL80211_IFTYPE_MESH_POINT] = { 722 .tx = 0xffff, 723 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 724 BIT(IEEE80211_STYPE_AUTH >> 4) | 725 BIT(IEEE80211_STYPE_DEAUTH >> 4), 726 }, 727 [NL80211_IFTYPE_P2P_DEVICE] = { 728 .tx = 0xffff, 729 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 730 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 731 }, 732 }; 733 734 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 735 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 736 IEEE80211_HT_AMPDU_PARM_DENSITY, 737 738 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 739 IEEE80211_HT_CAP_MAX_AMSDU | 740 IEEE80211_HT_CAP_SGI_20 | 741 IEEE80211_HT_CAP_SGI_40 | 742 IEEE80211_HT_CAP_TX_STBC | 743 IEEE80211_HT_CAP_RX_STBC | 744 IEEE80211_HT_CAP_LDPC_CODING | 745 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 746 .mcs = { 747 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 748 0xff, 0xff, 0xff, 0xff, 0xff, }, 749 }, 750 }; 751 752 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 753 .vht_cap_info = 754 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 755 IEEE80211_VHT_CAP_SHORT_GI_80 | 756 IEEE80211_VHT_CAP_SHORT_GI_160 | 757 IEEE80211_VHT_CAP_RXSTBC_MASK | 758 IEEE80211_VHT_CAP_TXSTBC | 759 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 760 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 761 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 762 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 763 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 764 .supp_mcs = { 765 .rx_mcs_map = cpu_to_le16(~0), 766 .tx_mcs_map = cpu_to_le16(~0), 767 }, 768 }; 769 770 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 771 const struct ieee80211_ops *ops, 772 const char *requested_name) 773 { 774 struct ieee80211_local *local; 775 int priv_size, i; 776 struct wiphy *wiphy; 777 bool emulate_chanctx; 778 779 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 780 !ops->add_interface || !ops->remove_interface || 781 !ops->configure_filter || !ops->wake_tx_queue)) 782 return NULL; 783 784 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 785 return NULL; 786 787 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 788 (ops->link_info_changed && ops->bss_info_changed))) 789 return NULL; 790 791 /* check all or no channel context operations exist */ 792 if (ops->add_chanctx == ieee80211_emulate_add_chanctx && 793 ops->remove_chanctx == ieee80211_emulate_remove_chanctx && 794 ops->change_chanctx == ieee80211_emulate_change_chanctx) { 795 if (WARN_ON(ops->assign_vif_chanctx || 796 ops->unassign_vif_chanctx)) 797 return NULL; 798 emulate_chanctx = true; 799 } else { 800 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx || 801 ops->remove_chanctx == ieee80211_emulate_remove_chanctx || 802 ops->change_chanctx == ieee80211_emulate_change_chanctx)) 803 return NULL; 804 if (WARN_ON(!ops->add_chanctx || 805 !ops->remove_chanctx || 806 !ops->change_chanctx || 807 !ops->assign_vif_chanctx || 808 !ops->unassign_vif_chanctx)) 809 return NULL; 810 emulate_chanctx = false; 811 } 812 813 /* Ensure 32-byte alignment of our private data and hw private data. 814 * We use the wiphy priv data for both our ieee80211_local and for 815 * the driver's private data 816 * 817 * In memory it'll be like this: 818 * 819 * +-------------------------+ 820 * | struct wiphy | 821 * +-------------------------+ 822 * | struct ieee80211_local | 823 * +-------------------------+ 824 * | driver's private data | 825 * +-------------------------+ 826 * 827 */ 828 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 829 830 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 831 832 if (!wiphy) 833 return NULL; 834 835 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 836 837 wiphy->privid = mac80211_wiphy_privid; 838 839 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 840 WIPHY_FLAG_4ADDR_AP | 841 WIPHY_FLAG_4ADDR_STATION | 842 WIPHY_FLAG_REPORTS_OBSS | 843 WIPHY_FLAG_OFFCHAN_TX; 844 845 if (emulate_chanctx || ops->remain_on_channel) 846 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 847 848 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 849 NL80211_FEATURE_SAE | 850 NL80211_FEATURE_HT_IBSS | 851 NL80211_FEATURE_VIF_TXPOWER | 852 NL80211_FEATURE_MAC_ON_CREATE | 853 NL80211_FEATURE_USERSPACE_MPM | 854 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 855 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 856 wiphy_ext_feature_set(wiphy, 857 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 858 wiphy_ext_feature_set(wiphy, 859 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 860 wiphy_ext_feature_set(wiphy, 861 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 862 wiphy_ext_feature_set(wiphy, 863 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 864 wiphy_ext_feature_set(wiphy, 865 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 866 867 if (!ops->hw_scan) { 868 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 869 NL80211_FEATURE_AP_SCAN; 870 /* 871 * if the driver behaves correctly using the probe request 872 * (template) from mac80211, then both of these should be 873 * supported even with hw scan - but let drivers opt in. 874 */ 875 wiphy_ext_feature_set(wiphy, 876 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 877 wiphy_ext_feature_set(wiphy, 878 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 879 } 880 881 if (!ops->set_key) { 882 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 883 wiphy_ext_feature_set(wiphy, 884 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT); 885 } 886 887 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 888 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 889 890 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 891 892 local = wiphy_priv(wiphy); 893 894 if (sta_info_init(local)) 895 goto err_free; 896 897 local->hw.wiphy = wiphy; 898 899 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 900 901 local->ops = ops; 902 local->emulate_chanctx = emulate_chanctx; 903 904 if (emulate_chanctx) 905 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA); 906 907 /* 908 * We need a bit of data queued to build aggregates properly, so 909 * instruct the TCP stack to allow more than a single ms of data 910 * to be queued in the stack. The value is a bit-shift of 1 911 * second, so 7 is ~8ms of queued data. Only affects local TCP 912 * sockets. 913 * This is the default, anyhow - drivers may need to override it 914 * for local reasons (longer buffers, longer completion time, or 915 * similar). 916 */ 917 local->hw.tx_sk_pacing_shift = 7; 918 919 /* set up some defaults */ 920 local->hw.queues = 1; 921 local->hw.max_rates = 1; 922 local->hw.max_report_rates = 0; 923 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 924 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 925 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 926 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 927 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 928 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 929 IEEE80211_RADIOTAP_MCS_HAVE_GI | 930 IEEE80211_RADIOTAP_MCS_HAVE_BW; 931 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 932 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 933 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 934 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 935 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 936 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 937 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 938 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 939 940 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 941 942 wiphy->extended_capabilities = local->ext_capa; 943 wiphy->extended_capabilities_mask = local->ext_capa; 944 wiphy->extended_capabilities_len = 945 ARRAY_SIZE(local->ext_capa); 946 947 INIT_LIST_HEAD(&local->interfaces); 948 INIT_LIST_HEAD(&local->mon_list); 949 950 __hw_addr_init(&local->mc_list); 951 952 mutex_init(&local->iflist_mtx); 953 spin_lock_init(&local->filter_lock); 954 spin_lock_init(&local->rx_path_lock); 955 spin_lock_init(&local->queue_stop_reason_lock); 956 957 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 958 INIT_LIST_HEAD(&local->active_txqs[i]); 959 spin_lock_init(&local->active_txq_lock[i]); 960 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 961 local->aql_txq_limit_high[i] = 962 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 963 atomic_set(&local->aql_ac_pending_airtime[i], 0); 964 } 965 966 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 967 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 968 atomic_set(&local->aql_total_pending_airtime, 0); 969 970 spin_lock_init(&local->handle_wake_tx_queue_lock); 971 972 INIT_LIST_HEAD(&local->chanctx_list); 973 974 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work); 975 976 INIT_WORK(&local->restart_work, ieee80211_restart_work); 977 978 wiphy_work_init(&local->radar_detected_work, 979 ieee80211_dfs_radar_detected_work); 980 981 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter); 982 983 wiphy_work_init(&local->dynamic_ps_enable_work, 984 ieee80211_dynamic_ps_enable_work); 985 wiphy_work_init(&local->dynamic_ps_disable_work, 986 ieee80211_dynamic_ps_disable_work); 987 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 988 989 wiphy_work_init(&local->sched_scan_stopped_work, 990 ieee80211_sched_scan_stopped_work); 991 992 spin_lock_init(&local->ack_status_lock); 993 idr_init(&local->ack_status_frames); 994 995 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 996 skb_queue_head_init(&local->pending[i]); 997 atomic_set(&local->agg_queue_stop[i], 0); 998 } 999 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 1000 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 1001 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 1002 1003 skb_queue_head_init(&local->skb_queue); 1004 skb_queue_head_init(&local->skb_queue_unreliable); 1005 1006 ieee80211_alloc_led_names(local); 1007 1008 ieee80211_roc_setup(local); 1009 1010 local->hw.radiotap_timestamp.units_pos = -1; 1011 local->hw.radiotap_timestamp.accuracy = -1; 1012 1013 return &local->hw; 1014 err_free: 1015 wiphy_free(wiphy); 1016 return NULL; 1017 } 1018 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 1019 1020 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 1021 { 1022 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 1023 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 1024 int r = 0, w = 0; 1025 u32 *suites; 1026 static const u32 cipher_suites[] = { 1027 /* keep WEP first, it may be removed below */ 1028 WLAN_CIPHER_SUITE_WEP40, 1029 WLAN_CIPHER_SUITE_WEP104, 1030 WLAN_CIPHER_SUITE_TKIP, 1031 WLAN_CIPHER_SUITE_CCMP, 1032 WLAN_CIPHER_SUITE_CCMP_256, 1033 WLAN_CIPHER_SUITE_GCMP, 1034 WLAN_CIPHER_SUITE_GCMP_256, 1035 1036 /* keep last -- depends on hw flags! */ 1037 WLAN_CIPHER_SUITE_AES_CMAC, 1038 WLAN_CIPHER_SUITE_BIP_CMAC_256, 1039 WLAN_CIPHER_SUITE_BIP_GMAC_128, 1040 WLAN_CIPHER_SUITE_BIP_GMAC_256, 1041 }; 1042 1043 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 1044 local->hw.wiphy->cipher_suites) { 1045 /* If the driver advertises, or doesn't support SW crypto, 1046 * we only need to remove WEP if necessary. 1047 */ 1048 if (have_wep) 1049 return 0; 1050 1051 /* well if it has _no_ ciphers ... fine */ 1052 if (!local->hw.wiphy->n_cipher_suites) 1053 return 0; 1054 1055 /* Driver provides cipher suites, but we need to exclude WEP */ 1056 suites = kmemdup_array(local->hw.wiphy->cipher_suites, 1057 local->hw.wiphy->n_cipher_suites, 1058 sizeof(u32), GFP_KERNEL); 1059 if (!suites) 1060 return -ENOMEM; 1061 1062 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 1063 u32 suite = local->hw.wiphy->cipher_suites[r]; 1064 1065 if (suite == WLAN_CIPHER_SUITE_WEP40 || 1066 suite == WLAN_CIPHER_SUITE_WEP104) 1067 continue; 1068 suites[w++] = suite; 1069 } 1070 } else { 1071 /* assign the (software supported and perhaps offloaded) 1072 * cipher suites 1073 */ 1074 local->hw.wiphy->cipher_suites = cipher_suites; 1075 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 1076 1077 if (!have_mfp) 1078 local->hw.wiphy->n_cipher_suites -= 4; 1079 1080 if (!have_wep) { 1081 local->hw.wiphy->cipher_suites += 2; 1082 local->hw.wiphy->n_cipher_suites -= 2; 1083 } 1084 1085 /* not dynamically allocated, so just return */ 1086 return 0; 1087 } 1088 1089 local->hw.wiphy->cipher_suites = suites; 1090 local->hw.wiphy->n_cipher_suites = w; 1091 local->wiphy_ciphers_allocated = true; 1092 1093 return 0; 1094 } 1095 1096 static bool 1097 ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb) 1098 { 1099 int i, j; 1100 1101 for (i = 0; i < n_comb; i++, c++) { 1102 /* DFS is not supported with multi-channel combinations yet */ 1103 if (c->radar_detect_widths && 1104 c->num_different_channels > 1) 1105 return false; 1106 1107 /* mac80211 doesn't support more than one IBSS interface */ 1108 for (j = 0; j < c->n_limits; j++) 1109 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1110 c->limits[j].max > 1) 1111 return false; 1112 } 1113 1114 return true; 1115 } 1116 1117 int ieee80211_register_hw(struct ieee80211_hw *hw) 1118 { 1119 struct ieee80211_local *local = hw_to_local(hw); 1120 int result, i; 1121 enum nl80211_band band; 1122 int channels, max_bitrates; 1123 bool supp_ht, supp_vht, supp_he, supp_eht; 1124 struct cfg80211_chan_def dflt_chandef = {}; 1125 1126 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 1127 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 1128 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 1129 return -EINVAL; 1130 1131 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 1132 (!local->ops->tdls_channel_switch || 1133 !local->ops->tdls_cancel_channel_switch || 1134 !local->ops->tdls_recv_channel_switch)) 1135 return -EOPNOTSUPP; 1136 1137 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 1138 !local->ops->set_frag_threshold)) 1139 return -EINVAL; 1140 1141 if (WARN_ON(local->hw.wiphy->interface_modes & 1142 BIT(NL80211_IFTYPE_NAN) && 1143 (!local->ops->start_nan || !local->ops->stop_nan))) 1144 return -EINVAL; 1145 1146 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 1147 /* 1148 * For drivers capable of doing MLO, assume modern driver 1149 * or firmware facilities, so software doesn't have to do 1150 * as much, e.g. monitoring beacons would be hard if we 1151 * might not even know which link is active at which time. 1152 */ 1153 if (WARN_ON(local->emulate_chanctx)) 1154 return -EINVAL; 1155 1156 if (WARN_ON(!local->ops->link_info_changed)) 1157 return -EINVAL; 1158 1159 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 1160 return -EINVAL; 1161 1162 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 1163 return -EINVAL; 1164 1165 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 1166 return -EINVAL; 1167 1168 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 1169 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 1170 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 1171 return -EINVAL; 1172 1173 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 1174 return -EINVAL; 1175 1176 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 1177 return -EINVAL; 1178 1179 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 1180 return -EINVAL; 1181 1182 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1183 return -EINVAL; 1184 1185 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1186 return -EINVAL; 1187 } 1188 1189 #ifdef CONFIG_PM 1190 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1191 return -EINVAL; 1192 #endif 1193 1194 if (local->emulate_chanctx) { 1195 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1196 const struct ieee80211_iface_combination *comb; 1197 1198 comb = &local->hw.wiphy->iface_combinations[i]; 1199 1200 if (comb->num_different_channels > 1) 1201 return -EINVAL; 1202 } 1203 } 1204 1205 if (hw->wiphy->n_radio) { 1206 for (i = 0; i < hw->wiphy->n_radio; i++) { 1207 const struct wiphy_radio *radio = &hw->wiphy->radio[i]; 1208 1209 if (!ieee80211_ifcomb_check(radio->iface_combinations, 1210 radio->n_iface_combinations)) 1211 return -EINVAL; 1212 } 1213 } else { 1214 if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations, 1215 hw->wiphy->n_iface_combinations)) 1216 return -EINVAL; 1217 } 1218 1219 /* Only HW csum features are currently compatible with mac80211 */ 1220 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1221 return -EINVAL; 1222 1223 if (hw->max_report_rates == 0) 1224 hw->max_report_rates = hw->max_rates; 1225 1226 local->rx_chains = 1; 1227 1228 /* 1229 * generic code guarantees at least one band, 1230 * set this very early because much code assumes 1231 * that hw.conf.channel is assigned 1232 */ 1233 channels = 0; 1234 max_bitrates = 0; 1235 supp_ht = false; 1236 supp_vht = false; 1237 supp_he = false; 1238 supp_eht = false; 1239 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1240 const struct ieee80211_sband_iftype_data *iftd; 1241 struct ieee80211_supported_band *sband; 1242 1243 sband = local->hw.wiphy->bands[band]; 1244 if (!sband) 1245 continue; 1246 1247 if (!dflt_chandef.chan) { 1248 /* 1249 * Assign the first enabled channel to dflt_chandef 1250 * from the list of channels 1251 */ 1252 for (i = 0; i < sband->n_channels; i++) 1253 if (!(sband->channels[i].flags & 1254 IEEE80211_CHAN_DISABLED)) 1255 break; 1256 /* if none found then use the first anyway */ 1257 if (i == sband->n_channels) 1258 i = 0; 1259 cfg80211_chandef_create(&dflt_chandef, 1260 &sband->channels[i], 1261 NL80211_CHAN_NO_HT); 1262 /* init channel we're on */ 1263 local->monitor_chanreq.oper = dflt_chandef; 1264 if (local->emulate_chanctx) { 1265 local->dflt_chandef = dflt_chandef; 1266 local->hw.conf.chandef = dflt_chandef; 1267 } 1268 } 1269 1270 channels += sband->n_channels; 1271 1272 /* 1273 * Due to the way the aggregation code handles this and it 1274 * being an HT capability, we can't really support delayed 1275 * BA in MLO (yet). 1276 */ 1277 if (WARN_ON(sband->ht_cap.ht_supported && 1278 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1279 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1280 return -EINVAL; 1281 1282 if (max_bitrates < sband->n_bitrates) 1283 max_bitrates = sband->n_bitrates; 1284 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1285 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1286 1287 for_each_sband_iftype_data(sband, i, iftd) { 1288 u8 he_40_mhz_cap; 1289 1290 supp_he = supp_he || iftd->he_cap.has_he; 1291 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1292 1293 if (band == NL80211_BAND_2GHZ) 1294 he_40_mhz_cap = 1295 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; 1296 else 1297 he_40_mhz_cap = 1298 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G; 1299 1300 /* currently no support for HE client where HT has 40 MHz but not HT */ 1301 if (iftd->he_cap.has_he && 1302 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) | 1303 BIT(NL80211_IFTYPE_P2P_CLIENT)) && 1304 sband->ht_cap.ht_supported && 1305 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 1306 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap)) 1307 return -EINVAL; 1308 } 1309 1310 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1311 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1312 (supp_ht || supp_vht || supp_he))) 1313 return -EINVAL; 1314 1315 /* EHT requires HE support */ 1316 if (WARN_ON(supp_eht && !supp_he)) 1317 return -EINVAL; 1318 1319 if (!sband->ht_cap.ht_supported) 1320 continue; 1321 1322 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1323 local->rx_chains = 1324 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1325 local->rx_chains); 1326 1327 /* no need to mask, SM_PS_DISABLED has all bits set */ 1328 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1329 IEEE80211_HT_CAP_SM_PS_SHIFT; 1330 } 1331 1332 /* if low-level driver supports AP, we also support VLAN. 1333 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1334 * based on their support to transmit SW encrypted packets. 1335 */ 1336 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1337 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1338 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1339 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1340 } 1341 1342 /* mac80211 always supports monitor */ 1343 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1344 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1345 1346 1347 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1348 sizeof(void *) * channels, GFP_KERNEL); 1349 if (!local->int_scan_req) 1350 return -ENOMEM; 1351 1352 eth_broadcast_addr(local->int_scan_req->bssid); 1353 1354 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1355 if (!local->hw.wiphy->bands[band]) 1356 continue; 1357 local->int_scan_req->rates[band] = (u32) -1; 1358 } 1359 1360 #ifndef CONFIG_MAC80211_MESH 1361 /* mesh depends on Kconfig, but drivers should set it if they want */ 1362 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1363 #endif 1364 1365 /* if the underlying driver supports mesh, mac80211 will (at least) 1366 * provide routing of mesh authentication frames to userspace */ 1367 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1368 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1369 1370 /* mac80211 supports control port protocol changing */ 1371 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1372 1373 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1374 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1375 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1376 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1377 if (hw->max_signal <= 0) { 1378 result = -EINVAL; 1379 goto fail_workqueue; 1380 } 1381 } 1382 1383 /* Mac80211 and therefore all drivers using SW crypto only 1384 * are able to handle PTK rekeys and Extended Key ID. 1385 */ 1386 if (!local->ops->set_key) { 1387 wiphy_ext_feature_set(local->hw.wiphy, 1388 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1389 wiphy_ext_feature_set(local->hw.wiphy, 1390 NL80211_EXT_FEATURE_EXT_KEY_ID); 1391 } 1392 1393 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1394 wiphy_ext_feature_set(local->hw.wiphy, 1395 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1396 1397 /* 1398 * Calculate scan IE length -- we need this to alloc 1399 * memory and to subtract from the driver limit. It 1400 * includes the DS Params, (extended) supported rates, and HT 1401 * information -- SSID is the driver's responsibility. 1402 */ 1403 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1404 3 /* DS Params */; 1405 if (supp_ht) 1406 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1407 1408 if (supp_vht) 1409 local->scan_ies_len += 1410 2 + sizeof(struct ieee80211_vht_cap); 1411 1412 /* 1413 * HE cap element is variable in size - set len to allow max size */ 1414 if (supp_he) { 1415 local->scan_ies_len += 1416 3 + sizeof(struct ieee80211_he_cap_elem) + 1417 sizeof(struct ieee80211_he_mcs_nss_supp) + 1418 IEEE80211_HE_PPE_THRES_MAX_LEN; 1419 1420 if (supp_eht) 1421 local->scan_ies_len += 1422 3 + sizeof(struct ieee80211_eht_cap_elem) + 1423 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1424 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1425 } 1426 1427 if (!local->ops->hw_scan) { 1428 /* For hw_scan, driver needs to set these up. */ 1429 local->hw.wiphy->max_scan_ssids = 4; 1430 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1431 } 1432 1433 /* 1434 * If the driver supports any scan IEs, then assume the 1435 * limit includes the IEs mac80211 will add, otherwise 1436 * leave it at zero and let the driver sort it out; we 1437 * still pass our IEs to the driver but userspace will 1438 * not be allowed to in that case. 1439 */ 1440 if (local->hw.wiphy->max_scan_ie_len) 1441 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1442 1443 result = ieee80211_init_cipher_suites(local); 1444 if (result < 0) 1445 goto fail_workqueue; 1446 1447 if (!local->ops->remain_on_channel) 1448 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1449 1450 /* mac80211 based drivers don't support internal TDLS setup */ 1451 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1452 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1453 1454 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1455 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1456 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1457 1458 /* mac80211 supports multi BSSID, if the driver supports it */ 1459 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1460 local->hw.wiphy->support_mbssid = true; 1461 if (ieee80211_hw_check(&local->hw, 1462 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1463 local->hw.wiphy->support_only_he_mbssid = true; 1464 else 1465 local->ext_capa[2] |= 1466 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1467 } 1468 1469 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1470 1471 /* 1472 * We use the number of queues for feature tests (QoS, HT) internally 1473 * so restrict them appropriately. 1474 */ 1475 if (hw->queues > IEEE80211_MAX_QUEUES) 1476 hw->queues = IEEE80211_MAX_QUEUES; 1477 1478 local->workqueue = 1479 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1480 if (!local->workqueue) { 1481 result = -ENOMEM; 1482 goto fail_workqueue; 1483 } 1484 1485 /* 1486 * The hardware needs headroom for sending the frame, 1487 * and we need some headroom for passing the frame to monitor 1488 * interfaces, but never both at the same time. 1489 */ 1490 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1491 IEEE80211_TX_STATUS_HEADROOM); 1492 1493 /* 1494 * if the driver doesn't specify a max listen interval we 1495 * use 5 which should be a safe default 1496 */ 1497 if (local->hw.max_listen_interval == 0) 1498 local->hw.max_listen_interval = 5; 1499 1500 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1501 1502 local->dynamic_ps_forced_timeout = -1; 1503 1504 if (!local->hw.max_nan_de_entries) 1505 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1506 1507 if (!local->hw.weight_multiplier) 1508 local->hw.weight_multiplier = 1; 1509 1510 ieee80211_wep_init(local); 1511 1512 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1513 1514 ieee80211_led_init(local); 1515 1516 result = ieee80211_txq_setup_flows(local); 1517 if (result) 1518 goto fail_flows; 1519 1520 rtnl_lock(); 1521 result = ieee80211_init_rate_ctrl_alg(local, 1522 hw->rate_control_algorithm); 1523 rtnl_unlock(); 1524 if (result < 0) { 1525 wiphy_debug(local->hw.wiphy, 1526 "Failed to initialize rate control algorithm\n"); 1527 goto fail_rate; 1528 } 1529 1530 if (local->rate_ctrl) { 1531 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1532 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1533 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1534 } 1535 1536 /* 1537 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1538 * or have it when we don't, copy the sband structure and set/clear it. 1539 * This is necessary because rate scaling algorithms could be switched 1540 * and have different support values. 1541 * Print a message so that in the common case the reallocation can be 1542 * avoided. 1543 */ 1544 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1545 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1546 struct ieee80211_supported_band *sband; 1547 bool local_cap, ie_cap; 1548 1549 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1550 1551 sband = local->hw.wiphy->bands[band]; 1552 if (!sband || !sband->vht_cap.vht_supported) 1553 continue; 1554 1555 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1556 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1557 1558 if (local_cap == ie_cap) 1559 continue; 1560 1561 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1562 if (!sband) { 1563 result = -ENOMEM; 1564 goto fail_rate; 1565 } 1566 1567 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1568 band); 1569 1570 sband->vht_cap.vht_mcs.tx_highest ^= 1571 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1572 1573 local->hw.wiphy->bands[band] = sband; 1574 local->sband_allocated |= BIT(band); 1575 } 1576 1577 result = wiphy_register(local->hw.wiphy); 1578 if (result < 0) 1579 goto fail_wiphy_register; 1580 1581 debugfs_hw_add(local); 1582 rate_control_add_debugfs(local); 1583 1584 ieee80211_check_wbrf_support(local); 1585 1586 rtnl_lock(); 1587 wiphy_lock(hw->wiphy); 1588 1589 /* add one default STA interface if supported */ 1590 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1591 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1592 struct vif_params params = {0}; 1593 1594 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1595 NL80211_IFTYPE_STATION, ¶ms); 1596 if (result) 1597 wiphy_warn(local->hw.wiphy, 1598 "Failed to add default virtual iface\n"); 1599 } 1600 1601 wiphy_unlock(hw->wiphy); 1602 rtnl_unlock(); 1603 1604 #ifdef CONFIG_INET 1605 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1606 result = register_inetaddr_notifier(&local->ifa_notifier); 1607 if (result) 1608 goto fail_ifa; 1609 #endif 1610 1611 #if IS_ENABLED(CONFIG_IPV6) 1612 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1613 result = register_inet6addr_notifier(&local->ifa6_notifier); 1614 if (result) 1615 goto fail_ifa6; 1616 #endif 1617 1618 return 0; 1619 1620 #if IS_ENABLED(CONFIG_IPV6) 1621 fail_ifa6: 1622 #ifdef CONFIG_INET 1623 unregister_inetaddr_notifier(&local->ifa_notifier); 1624 #endif 1625 #endif 1626 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1627 fail_ifa: 1628 #endif 1629 wiphy_unregister(local->hw.wiphy); 1630 fail_wiphy_register: 1631 rtnl_lock(); 1632 rate_control_deinitialize(local); 1633 ieee80211_remove_interfaces(local); 1634 rtnl_unlock(); 1635 fail_rate: 1636 ieee80211_txq_teardown_flows(local); 1637 fail_flows: 1638 ieee80211_led_exit(local); 1639 destroy_workqueue(local->workqueue); 1640 fail_workqueue: 1641 if (local->wiphy_ciphers_allocated) { 1642 kfree(local->hw.wiphy->cipher_suites); 1643 local->wiphy_ciphers_allocated = false; 1644 } 1645 kfree(local->int_scan_req); 1646 return result; 1647 } 1648 EXPORT_SYMBOL(ieee80211_register_hw); 1649 1650 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1651 { 1652 struct ieee80211_local *local = hw_to_local(hw); 1653 1654 tasklet_kill(&local->tx_pending_tasklet); 1655 tasklet_kill(&local->tasklet); 1656 1657 #ifdef CONFIG_INET 1658 unregister_inetaddr_notifier(&local->ifa_notifier); 1659 #endif 1660 #if IS_ENABLED(CONFIG_IPV6) 1661 unregister_inet6addr_notifier(&local->ifa6_notifier); 1662 #endif 1663 1664 rtnl_lock(); 1665 1666 /* 1667 * At this point, interface list manipulations are fine 1668 * because the driver cannot be handing us frames any 1669 * more and the tasklet is killed. 1670 */ 1671 ieee80211_remove_interfaces(local); 1672 1673 ieee80211_txq_teardown_flows(local); 1674 1675 wiphy_lock(local->hw.wiphy); 1676 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work); 1677 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter); 1678 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work); 1679 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work); 1680 wiphy_unlock(local->hw.wiphy); 1681 rtnl_unlock(); 1682 1683 cancel_work_sync(&local->restart_work); 1684 1685 ieee80211_clear_tx_pending(local); 1686 rate_control_deinitialize(local); 1687 1688 if (skb_queue_len(&local->skb_queue) || 1689 skb_queue_len(&local->skb_queue_unreliable)) 1690 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1691 skb_queue_purge(&local->skb_queue); 1692 skb_queue_purge(&local->skb_queue_unreliable); 1693 1694 wiphy_unregister(local->hw.wiphy); 1695 destroy_workqueue(local->workqueue); 1696 ieee80211_led_exit(local); 1697 kfree(local->int_scan_req); 1698 } 1699 EXPORT_SYMBOL(ieee80211_unregister_hw); 1700 1701 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1702 { 1703 WARN_ONCE(1, "Have pending ack frames!\n"); 1704 kfree_skb(p); 1705 return 0; 1706 } 1707 1708 void ieee80211_free_hw(struct ieee80211_hw *hw) 1709 { 1710 struct ieee80211_local *local = hw_to_local(hw); 1711 enum nl80211_band band; 1712 1713 mutex_destroy(&local->iflist_mtx); 1714 1715 if (local->wiphy_ciphers_allocated) { 1716 kfree(local->hw.wiphy->cipher_suites); 1717 local->wiphy_ciphers_allocated = false; 1718 } 1719 1720 idr_for_each(&local->ack_status_frames, 1721 ieee80211_free_ack_frame, NULL); 1722 idr_destroy(&local->ack_status_frames); 1723 1724 sta_info_stop(local); 1725 1726 ieee80211_free_led_names(local); 1727 1728 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1729 if (!(local->sband_allocated & BIT(band))) 1730 continue; 1731 kfree(local->hw.wiphy->bands[band]); 1732 } 1733 1734 wiphy_free(local->hw.wiphy); 1735 } 1736 EXPORT_SYMBOL(ieee80211_free_hw); 1737 1738 static const char * const drop_reasons_monitor[] = { 1739 #define V(x) #x, 1740 [0] = "RX_DROP_MONITOR", 1741 MAC80211_DROP_REASONS_MONITOR(V) 1742 }; 1743 1744 static struct drop_reason_list drop_reason_list_monitor = { 1745 .reasons = drop_reasons_monitor, 1746 .n_reasons = ARRAY_SIZE(drop_reasons_monitor), 1747 }; 1748 1749 static const char * const drop_reasons_unusable[] = { 1750 [0] = "RX_DROP_UNUSABLE", 1751 MAC80211_DROP_REASONS_UNUSABLE(V) 1752 #undef V 1753 }; 1754 1755 static struct drop_reason_list drop_reason_list_unusable = { 1756 .reasons = drop_reasons_unusable, 1757 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1758 }; 1759 1760 static int __init ieee80211_init(void) 1761 { 1762 struct sk_buff *skb; 1763 int ret; 1764 1765 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1766 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1767 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1768 1769 ret = rc80211_minstrel_init(); 1770 if (ret) 1771 return ret; 1772 1773 ret = ieee80211_iface_init(); 1774 if (ret) 1775 goto err_netdev; 1776 1777 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, 1778 &drop_reason_list_monitor); 1779 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1780 &drop_reason_list_unusable); 1781 1782 return 0; 1783 err_netdev: 1784 rc80211_minstrel_exit(); 1785 1786 return ret; 1787 } 1788 1789 static void __exit ieee80211_exit(void) 1790 { 1791 rc80211_minstrel_exit(); 1792 1793 ieee80211s_stop(); 1794 1795 ieee80211_iface_exit(); 1796 1797 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); 1798 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1799 1800 rcu_barrier(); 1801 } 1802 1803 1804 subsys_initcall(ieee80211_init); 1805 module_exit(ieee80211_exit); 1806 1807 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1808 MODULE_LICENSE("GPL"); 1809