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