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