1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Interface handling 4 * 5 * Copyright 2002-2005, Instant802 Networks, Inc. 6 * Copyright 2005-2006, Devicescape Software, Inc. 7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (c) 2016 Intel Deutschland GmbH 11 * Copyright (C) 2018-2021 Intel Corporation 12 */ 13 #include <linux/slab.h> 14 #include <linux/kernel.h> 15 #include <linux/if_arp.h> 16 #include <linux/netdevice.h> 17 #include <linux/rtnetlink.h> 18 #include <linux/kcov.h> 19 #include <net/mac80211.h> 20 #include <net/ieee80211_radiotap.h> 21 #include "ieee80211_i.h" 22 #include "sta_info.h" 23 #include "debugfs_netdev.h" 24 #include "mesh.h" 25 #include "led.h" 26 #include "driver-ops.h" 27 #include "wme.h" 28 #include "rate.h" 29 30 /** 31 * DOC: Interface list locking 32 * 33 * The interface list in each struct ieee80211_local is protected 34 * three-fold: 35 * 36 * (1) modifications may only be done under the RTNL 37 * (2) modifications and readers are protected against each other by 38 * the iflist_mtx. 39 * (3) modifications are done in an RCU manner so atomic readers 40 * can traverse the list in RCU-safe blocks. 41 * 42 * As a consequence, reads (traversals) of the list can be protected 43 * by either the RTNL, the iflist_mtx or RCU. 44 */ 45 46 static void ieee80211_iface_work(struct work_struct *work); 47 48 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 49 { 50 struct ieee80211_chanctx_conf *chanctx_conf; 51 int power; 52 53 rcu_read_lock(); 54 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 55 if (!chanctx_conf) { 56 rcu_read_unlock(); 57 return false; 58 } 59 60 power = ieee80211_chandef_max_power(&chanctx_conf->def); 61 rcu_read_unlock(); 62 63 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 64 power = min(power, sdata->user_power_level); 65 66 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 67 power = min(power, sdata->ap_power_level); 68 69 if (power != sdata->vif.bss_conf.txpower) { 70 sdata->vif.bss_conf.txpower = power; 71 ieee80211_hw_config(sdata->local, 0); 72 return true; 73 } 74 75 return false; 76 } 77 78 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 79 bool update_bss) 80 { 81 if (__ieee80211_recalc_txpower(sdata) || 82 (update_bss && ieee80211_sdata_running(sdata))) 83 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 84 } 85 86 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 87 { 88 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 89 return 0; 90 91 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 92 return IEEE80211_CONF_CHANGE_IDLE; 93 } 94 95 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 96 { 97 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 98 return 0; 99 100 ieee80211_flush_queues(local, NULL, false); 101 102 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 103 return IEEE80211_CONF_CHANGE_IDLE; 104 } 105 106 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 107 bool force_active) 108 { 109 bool working, scanning, active; 110 unsigned int led_trig_start = 0, led_trig_stop = 0; 111 112 lockdep_assert_held(&local->mtx); 113 114 active = force_active || 115 !list_empty(&local->chanctx_list) || 116 local->monitors; 117 118 working = !local->ops->remain_on_channel && 119 !list_empty(&local->roc_list); 120 121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 123 124 if (working || scanning) 125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 126 else 127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 128 129 if (active) 130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 131 else 132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 133 134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 135 136 if (working || scanning || active) 137 return __ieee80211_idle_off(local); 138 return __ieee80211_idle_on(local); 139 } 140 141 u32 ieee80211_idle_off(struct ieee80211_local *local) 142 { 143 return __ieee80211_recalc_idle(local, true); 144 } 145 146 void ieee80211_recalc_idle(struct ieee80211_local *local) 147 { 148 u32 change = __ieee80211_recalc_idle(local, false); 149 if (change) 150 ieee80211_hw_config(local, change); 151 } 152 153 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 154 bool check_dup) 155 { 156 struct ieee80211_local *local = sdata->local; 157 struct ieee80211_sub_if_data *iter; 158 u64 new, mask, tmp; 159 u8 *m; 160 int ret = 0; 161 162 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 163 return 0; 164 165 m = addr; 166 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 167 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 168 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 169 170 m = local->hw.wiphy->addr_mask; 171 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 174 175 if (!check_dup) 176 return ret; 177 178 mutex_lock(&local->iflist_mtx); 179 list_for_each_entry(iter, &local->interfaces, list) { 180 if (iter == sdata) 181 continue; 182 183 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 184 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 185 continue; 186 187 m = iter->vif.addr; 188 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 189 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 190 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 191 192 if ((new & ~mask) != (tmp & ~mask)) { 193 ret = -EINVAL; 194 break; 195 } 196 } 197 mutex_unlock(&local->iflist_mtx); 198 199 return ret; 200 } 201 202 static int ieee80211_change_mac(struct net_device *dev, void *addr) 203 { 204 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 205 struct sockaddr *sa = addr; 206 bool check_dup = true; 207 int ret; 208 209 if (ieee80211_sdata_running(sdata)) 210 return -EBUSY; 211 212 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 213 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 214 check_dup = false; 215 216 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 217 if (ret) 218 return ret; 219 220 ret = eth_mac_addr(dev, sa); 221 222 if (ret == 0) 223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 224 225 return ret; 226 } 227 228 static inline int identical_mac_addr_allowed(int type1, int type2) 229 { 230 return type1 == NL80211_IFTYPE_MONITOR || 231 type2 == NL80211_IFTYPE_MONITOR || 232 type1 == NL80211_IFTYPE_P2P_DEVICE || 233 type2 == NL80211_IFTYPE_P2P_DEVICE || 234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 235 (type1 == NL80211_IFTYPE_AP_VLAN && 236 (type2 == NL80211_IFTYPE_AP || 237 type2 == NL80211_IFTYPE_AP_VLAN)); 238 } 239 240 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 241 enum nl80211_iftype iftype) 242 { 243 struct ieee80211_local *local = sdata->local; 244 struct ieee80211_sub_if_data *nsdata; 245 int ret; 246 247 ASSERT_RTNL(); 248 249 /* we hold the RTNL here so can safely walk the list */ 250 list_for_each_entry(nsdata, &local->interfaces, list) { 251 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 252 /* 253 * Only OCB and monitor mode may coexist 254 */ 255 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 256 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 257 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 258 nsdata->vif.type == NL80211_IFTYPE_OCB)) 259 return -EBUSY; 260 261 /* 262 * Allow only a single IBSS interface to be up at any 263 * time. This is restricted because beacon distribution 264 * cannot work properly if both are in the same IBSS. 265 * 266 * To remove this restriction we'd have to disallow them 267 * from setting the same SSID on different IBSS interfaces 268 * belonging to the same hardware. Then, however, we're 269 * faced with having to adopt two different TSF timers... 270 */ 271 if (iftype == NL80211_IFTYPE_ADHOC && 272 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 273 return -EBUSY; 274 /* 275 * will not add another interface while any channel 276 * switch is active. 277 */ 278 if (nsdata->vif.csa_active) 279 return -EBUSY; 280 281 /* 282 * The remaining checks are only performed for interfaces 283 * with the same MAC address. 284 */ 285 if (!ether_addr_equal(sdata->vif.addr, 286 nsdata->vif.addr)) 287 continue; 288 289 /* 290 * check whether it may have the same address 291 */ 292 if (!identical_mac_addr_allowed(iftype, 293 nsdata->vif.type)) 294 return -ENOTUNIQ; 295 296 /* 297 * can only add VLANs to enabled APs 298 */ 299 if (iftype == NL80211_IFTYPE_AP_VLAN && 300 nsdata->vif.type == NL80211_IFTYPE_AP) 301 sdata->bss = &nsdata->u.ap; 302 } 303 } 304 305 mutex_lock(&local->chanctx_mtx); 306 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 307 mutex_unlock(&local->chanctx_mtx); 308 return ret; 309 } 310 311 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 312 enum nl80211_iftype iftype) 313 { 314 int n_queues = sdata->local->hw.queues; 315 int i; 316 317 if (iftype == NL80211_IFTYPE_NAN) 318 return 0; 319 320 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 321 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 323 IEEE80211_INVAL_HW_QUEUE)) 324 return -EINVAL; 325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 326 n_queues)) 327 return -EINVAL; 328 } 329 } 330 331 if ((iftype != NL80211_IFTYPE_AP && 332 iftype != NL80211_IFTYPE_P2P_GO && 333 iftype != NL80211_IFTYPE_MESH_POINT) || 334 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 335 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 336 return 0; 337 } 338 339 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 340 return -EINVAL; 341 342 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 343 return -EINVAL; 344 345 return 0; 346 } 347 348 static int ieee80211_open(struct net_device *dev) 349 { 350 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 351 int err; 352 353 /* fail early if user set an invalid address */ 354 if (!is_valid_ether_addr(dev->dev_addr)) 355 return -EADDRNOTAVAIL; 356 357 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 358 if (err) 359 return err; 360 361 wiphy_lock(sdata->local->hw.wiphy); 362 err = ieee80211_do_open(&sdata->wdev, true); 363 wiphy_unlock(sdata->local->hw.wiphy); 364 365 return err; 366 } 367 368 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down) 369 { 370 struct ieee80211_local *local = sdata->local; 371 unsigned long flags; 372 struct sk_buff *skb, *tmp; 373 u32 hw_reconf_flags = 0; 374 int i, flushed; 375 struct ps_data *ps; 376 struct cfg80211_chan_def chandef; 377 bool cancel_scan; 378 struct cfg80211_nan_func *func; 379 380 spin_lock_bh(&local->fq.lock); 381 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 382 spin_unlock_bh(&local->fq.lock); 383 384 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 385 if (cancel_scan) 386 ieee80211_scan_cancel(local); 387 388 /* 389 * Stop TX on this interface first. 390 */ 391 if (sdata->dev) 392 netif_tx_stop_all_queues(sdata->dev); 393 394 ieee80211_roc_purge(local, sdata); 395 396 switch (sdata->vif.type) { 397 case NL80211_IFTYPE_STATION: 398 ieee80211_mgd_stop(sdata); 399 break; 400 case NL80211_IFTYPE_ADHOC: 401 ieee80211_ibss_stop(sdata); 402 break; 403 case NL80211_IFTYPE_MONITOR: 404 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 405 break; 406 list_del_rcu(&sdata->u.mntr.list); 407 break; 408 default: 409 break; 410 } 411 412 /* 413 * Remove all stations associated with this interface. 414 * 415 * This must be done before calling ops->remove_interface() 416 * because otherwise we can later invoke ops->sta_notify() 417 * whenever the STAs are removed, and that invalidates driver 418 * assumptions about always getting a vif pointer that is valid 419 * (because if we remove a STA after ops->remove_interface() 420 * the driver will have removed the vif info already!) 421 * 422 * For AP_VLANs stations may exist since there's nothing else that 423 * would have removed them, but in other modes there shouldn't 424 * be any stations. 425 */ 426 flushed = sta_info_flush(sdata); 427 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0); 428 429 /* don't count this interface for allmulti while it is down */ 430 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 431 atomic_dec(&local->iff_allmultis); 432 433 if (sdata->vif.type == NL80211_IFTYPE_AP) { 434 local->fif_pspoll--; 435 local->fif_probe_req--; 436 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 437 local->fif_probe_req--; 438 } 439 440 if (sdata->dev) { 441 netif_addr_lock_bh(sdata->dev); 442 spin_lock_bh(&local->filter_lock); 443 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 444 sdata->dev->addr_len); 445 spin_unlock_bh(&local->filter_lock); 446 netif_addr_unlock_bh(sdata->dev); 447 } 448 449 del_timer_sync(&local->dynamic_ps_timer); 450 cancel_work_sync(&local->dynamic_ps_enable_work); 451 452 cancel_work_sync(&sdata->recalc_smps); 453 sdata_lock(sdata); 454 mutex_lock(&local->mtx); 455 sdata->vif.csa_active = false; 456 if (sdata->vif.type == NL80211_IFTYPE_STATION) 457 sdata->u.mgd.csa_waiting_bcn = false; 458 if (sdata->csa_block_tx) { 459 ieee80211_wake_vif_queues(local, sdata, 460 IEEE80211_QUEUE_STOP_REASON_CSA); 461 sdata->csa_block_tx = false; 462 } 463 mutex_unlock(&local->mtx); 464 sdata_unlock(sdata); 465 466 cancel_work_sync(&sdata->csa_finalize_work); 467 cancel_work_sync(&sdata->color_change_finalize_work); 468 469 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 470 471 if (sdata->wdev.cac_started) { 472 chandef = sdata->vif.bss_conf.chandef; 473 WARN_ON(local->suspended); 474 mutex_lock(&local->mtx); 475 ieee80211_vif_release_channel(sdata); 476 mutex_unlock(&local->mtx); 477 cfg80211_cac_event(sdata->dev, &chandef, 478 NL80211_RADAR_CAC_ABORTED, 479 GFP_KERNEL); 480 } 481 482 if (sdata->vif.type == NL80211_IFTYPE_AP) { 483 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 484 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 485 /* remove all packets in parent bc_buf pointing to this dev */ 486 ps = &sdata->bss->ps; 487 488 spin_lock_irqsave(&ps->bc_buf.lock, flags); 489 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 490 if (skb->dev == sdata->dev) { 491 __skb_unlink(skb, &ps->bc_buf); 492 local->total_ps_buffered--; 493 ieee80211_free_txskb(&local->hw, skb); 494 } 495 } 496 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 497 } 498 499 if (going_down) 500 local->open_count--; 501 502 switch (sdata->vif.type) { 503 case NL80211_IFTYPE_AP_VLAN: 504 mutex_lock(&local->mtx); 505 list_del(&sdata->u.vlan.list); 506 mutex_unlock(&local->mtx); 507 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 508 /* see comment in the default case below */ 509 ieee80211_free_keys(sdata, true); 510 /* no need to tell driver */ 511 break; 512 case NL80211_IFTYPE_MONITOR: 513 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 514 local->cooked_mntrs--; 515 break; 516 } 517 518 local->monitors--; 519 if (local->monitors == 0) { 520 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 521 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 522 } 523 524 ieee80211_adjust_monitor_flags(sdata, -1); 525 break; 526 case NL80211_IFTYPE_NAN: 527 /* clean all the functions */ 528 spin_lock_bh(&sdata->u.nan.func_lock); 529 530 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 531 idr_remove(&sdata->u.nan.function_inst_ids, i); 532 cfg80211_free_nan_func(func); 533 } 534 idr_destroy(&sdata->u.nan.function_inst_ids); 535 536 spin_unlock_bh(&sdata->u.nan.func_lock); 537 break; 538 case NL80211_IFTYPE_P2P_DEVICE: 539 /* relies on synchronize_rcu() below */ 540 RCU_INIT_POINTER(local->p2p_sdata, NULL); 541 fallthrough; 542 default: 543 cancel_work_sync(&sdata->work); 544 /* 545 * When we get here, the interface is marked down. 546 * Free the remaining keys, if there are any 547 * (which can happen in AP mode if userspace sets 548 * keys before the interface is operating) 549 * 550 * Force the key freeing to always synchronize_net() 551 * to wait for the RX path in case it is using this 552 * interface enqueuing frames at this very time on 553 * another CPU. 554 */ 555 ieee80211_free_keys(sdata, true); 556 skb_queue_purge(&sdata->skb_queue); 557 skb_queue_purge(&sdata->status_queue); 558 } 559 560 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 561 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 562 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 563 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 564 if (info->control.vif == &sdata->vif) { 565 __skb_unlink(skb, &local->pending[i]); 566 ieee80211_free_txskb(&local->hw, skb); 567 } 568 } 569 } 570 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 571 572 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 573 ieee80211_txq_remove_vlan(local, sdata); 574 575 sdata->bss = NULL; 576 577 if (local->open_count == 0) 578 ieee80211_clear_tx_pending(local); 579 580 sdata->vif.bss_conf.beacon_int = 0; 581 582 /* 583 * If the interface goes down while suspended, presumably because 584 * the device was unplugged and that happens before our resume, 585 * then the driver is already unconfigured and the remainder of 586 * this function isn't needed. 587 * XXX: what about WoWLAN? If the device has software state, e.g. 588 * memory allocated, it might expect teardown commands from 589 * mac80211 here? 590 */ 591 if (local->suspended) { 592 WARN_ON(local->wowlan); 593 WARN_ON(rcu_access_pointer(local->monitor_sdata)); 594 return; 595 } 596 597 switch (sdata->vif.type) { 598 case NL80211_IFTYPE_AP_VLAN: 599 break; 600 case NL80211_IFTYPE_MONITOR: 601 if (local->monitors == 0) 602 ieee80211_del_virtual_monitor(local); 603 604 mutex_lock(&local->mtx); 605 ieee80211_recalc_idle(local); 606 mutex_unlock(&local->mtx); 607 608 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 609 break; 610 611 fallthrough; 612 default: 613 if (going_down) 614 drv_remove_interface(local, sdata); 615 } 616 617 ieee80211_recalc_ps(local); 618 619 if (cancel_scan) 620 flush_delayed_work(&local->scan_work); 621 622 if (local->open_count == 0) { 623 ieee80211_stop_device(local); 624 625 /* no reconfiguring after stop! */ 626 return; 627 } 628 629 /* do after stop to avoid reconfiguring when we stop anyway */ 630 ieee80211_configure_filter(local); 631 ieee80211_hw_config(local, hw_reconf_flags); 632 633 if (local->monitors == local->open_count) 634 ieee80211_add_virtual_monitor(local); 635 } 636 637 static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata) 638 { 639 struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata; 640 struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif; 641 642 if (!tx_vif) 643 return; 644 645 tx_sdata = vif_to_sdata(tx_vif); 646 sdata->vif.mbssid_tx_vif = NULL; 647 648 list_for_each_entry_safe(non_tx_sdata, tmp_sdata, 649 &tx_sdata->local->interfaces, list) { 650 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata && 651 non_tx_sdata->vif.mbssid_tx_vif == tx_vif && 652 ieee80211_sdata_running(non_tx_sdata)) { 653 non_tx_sdata->vif.mbssid_tx_vif = NULL; 654 dev_close(non_tx_sdata->wdev.netdev); 655 } 656 } 657 658 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) { 659 tx_sdata->vif.mbssid_tx_vif = NULL; 660 dev_close(tx_sdata->wdev.netdev); 661 } 662 } 663 664 static int ieee80211_stop(struct net_device *dev) 665 { 666 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 667 668 /* close dependent VLAN and MBSSID interfaces before locking wiphy */ 669 if (sdata->vif.type == NL80211_IFTYPE_AP) { 670 struct ieee80211_sub_if_data *vlan, *tmpsdata; 671 672 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 673 u.vlan.list) 674 dev_close(vlan->dev); 675 676 ieee80211_stop_mbssid(sdata); 677 } 678 679 wiphy_lock(sdata->local->hw.wiphy); 680 ieee80211_do_stop(sdata, true); 681 wiphy_unlock(sdata->local->hw.wiphy); 682 683 return 0; 684 } 685 686 static void ieee80211_set_multicast_list(struct net_device *dev) 687 { 688 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 689 struct ieee80211_local *local = sdata->local; 690 int allmulti, sdata_allmulti; 691 692 allmulti = !!(dev->flags & IFF_ALLMULTI); 693 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 694 695 if (allmulti != sdata_allmulti) { 696 if (dev->flags & IFF_ALLMULTI) 697 atomic_inc(&local->iff_allmultis); 698 else 699 atomic_dec(&local->iff_allmultis); 700 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 701 } 702 703 spin_lock_bh(&local->filter_lock); 704 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 705 spin_unlock_bh(&local->filter_lock); 706 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 707 } 708 709 /* 710 * Called when the netdev is removed or, by the code below, before 711 * the interface type changes. 712 */ 713 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 714 { 715 /* free extra data */ 716 ieee80211_free_keys(sdata, false); 717 718 ieee80211_debugfs_remove_netdev(sdata); 719 720 ieee80211_destroy_frag_cache(&sdata->frags); 721 722 if (ieee80211_vif_is_mesh(&sdata->vif)) 723 ieee80211_mesh_teardown_sdata(sdata); 724 } 725 726 static void ieee80211_uninit(struct net_device *dev) 727 { 728 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 729 } 730 731 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 732 struct sk_buff *skb, 733 struct net_device *sb_dev) 734 { 735 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 736 } 737 738 static void 739 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 740 { 741 dev_fetch_sw_netstats(stats, dev->tstats); 742 } 743 744 static const struct net_device_ops ieee80211_dataif_ops = { 745 .ndo_open = ieee80211_open, 746 .ndo_stop = ieee80211_stop, 747 .ndo_uninit = ieee80211_uninit, 748 .ndo_start_xmit = ieee80211_subif_start_xmit, 749 .ndo_set_rx_mode = ieee80211_set_multicast_list, 750 .ndo_set_mac_address = ieee80211_change_mac, 751 .ndo_select_queue = ieee80211_netdev_select_queue, 752 .ndo_get_stats64 = ieee80211_get_stats64, 753 }; 754 755 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 756 struct sk_buff *skb, 757 struct net_device *sb_dev) 758 { 759 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 760 struct ieee80211_local *local = sdata->local; 761 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 762 struct ieee80211_hdr *hdr; 763 int len_rthdr; 764 765 if (local->hw.queues < IEEE80211_NUM_ACS) 766 return 0; 767 768 /* reset flags and info before parsing radiotap header */ 769 memset(info, 0, sizeof(*info)); 770 771 if (!ieee80211_parse_tx_radiotap(skb, dev)) 772 return 0; /* doesn't matter, frame will be dropped */ 773 774 len_rthdr = ieee80211_get_radiotap_len(skb->data); 775 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 776 if (skb->len < len_rthdr + 2 || 777 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 778 return 0; /* doesn't matter, frame will be dropped */ 779 780 return ieee80211_select_queue_80211(sdata, skb, hdr); 781 } 782 783 static const struct net_device_ops ieee80211_monitorif_ops = { 784 .ndo_open = ieee80211_open, 785 .ndo_stop = ieee80211_stop, 786 .ndo_uninit = ieee80211_uninit, 787 .ndo_start_xmit = ieee80211_monitor_start_xmit, 788 .ndo_set_rx_mode = ieee80211_set_multicast_list, 789 .ndo_set_mac_address = ieee80211_change_mac, 790 .ndo_select_queue = ieee80211_monitor_select_queue, 791 .ndo_get_stats64 = ieee80211_get_stats64, 792 }; 793 794 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx, 795 struct net_device_path *path) 796 { 797 struct ieee80211_sub_if_data *sdata; 798 struct ieee80211_local *local; 799 struct sta_info *sta; 800 int ret = -ENOENT; 801 802 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev); 803 local = sdata->local; 804 805 if (!local->ops->net_fill_forward_path) 806 return -EOPNOTSUPP; 807 808 rcu_read_lock(); 809 switch (sdata->vif.type) { 810 case NL80211_IFTYPE_AP_VLAN: 811 sta = rcu_dereference(sdata->u.vlan.sta); 812 if (sta) 813 break; 814 if (sdata->wdev.use_4addr) 815 goto out; 816 if (is_multicast_ether_addr(ctx->daddr)) 817 goto out; 818 sta = sta_info_get_bss(sdata, ctx->daddr); 819 break; 820 case NL80211_IFTYPE_AP: 821 if (is_multicast_ether_addr(ctx->daddr)) 822 goto out; 823 sta = sta_info_get(sdata, ctx->daddr); 824 break; 825 case NL80211_IFTYPE_STATION: 826 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { 827 sta = sta_info_get(sdata, ctx->daddr); 828 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { 829 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 830 goto out; 831 832 break; 833 } 834 } 835 836 sta = sta_info_get(sdata, sdata->u.mgd.bssid); 837 break; 838 default: 839 goto out; 840 } 841 842 if (!sta) 843 goto out; 844 845 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path); 846 out: 847 rcu_read_unlock(); 848 849 return ret; 850 } 851 852 static const struct net_device_ops ieee80211_dataif_8023_ops = { 853 .ndo_open = ieee80211_open, 854 .ndo_stop = ieee80211_stop, 855 .ndo_uninit = ieee80211_uninit, 856 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 857 .ndo_set_rx_mode = ieee80211_set_multicast_list, 858 .ndo_set_mac_address = ieee80211_change_mac, 859 .ndo_select_queue = ieee80211_netdev_select_queue, 860 .ndo_get_stats64 = ieee80211_get_stats64, 861 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path, 862 }; 863 864 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 865 { 866 switch (iftype) { 867 /* P2P GO and client are mapped to AP/STATION types */ 868 case NL80211_IFTYPE_AP: 869 case NL80211_IFTYPE_STATION: 870 return true; 871 default: 872 return false; 873 } 874 } 875 876 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 877 { 878 struct ieee80211_local *local = sdata->local; 879 u32 flags; 880 881 flags = sdata->vif.offload_flags; 882 883 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 884 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 885 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 886 887 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 888 local->hw.wiphy->frag_threshold != (u32)-1) 889 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 890 891 if (local->monitors) 892 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 893 } else { 894 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 895 } 896 897 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 898 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 899 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 900 901 if (local->monitors && 902 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP)) 903 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 904 } else { 905 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 906 } 907 908 if (sdata->vif.offload_flags == flags) 909 return false; 910 911 sdata->vif.offload_flags = flags; 912 ieee80211_check_fast_rx_iface(sdata); 913 return true; 914 } 915 916 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 917 { 918 struct ieee80211_local *local = sdata->local; 919 struct ieee80211_sub_if_data *bss = sdata; 920 bool enabled; 921 922 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 923 if (!sdata->bss) 924 return; 925 926 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 927 } 928 929 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 930 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 931 return; 932 933 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 934 if (sdata->wdev.use_4addr && 935 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 936 enabled = false; 937 938 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 939 &ieee80211_dataif_ops; 940 } 941 942 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 943 { 944 struct ieee80211_local *local = sdata->local; 945 struct ieee80211_sub_if_data *vsdata; 946 947 if (ieee80211_set_sdata_offload_flags(sdata)) { 948 drv_update_vif_offload(local, sdata); 949 ieee80211_set_vif_encap_ops(sdata); 950 } 951 952 list_for_each_entry(vsdata, &local->interfaces, list) { 953 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 954 vsdata->bss != &sdata->u.ap) 955 continue; 956 957 ieee80211_set_vif_encap_ops(vsdata); 958 } 959 } 960 961 void ieee80211_recalc_offload(struct ieee80211_local *local) 962 { 963 struct ieee80211_sub_if_data *sdata; 964 965 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 966 return; 967 968 mutex_lock(&local->iflist_mtx); 969 970 list_for_each_entry(sdata, &local->interfaces, list) { 971 if (!ieee80211_sdata_running(sdata)) 972 continue; 973 974 ieee80211_recalc_sdata_offload(sdata); 975 } 976 977 mutex_unlock(&local->iflist_mtx); 978 } 979 980 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 981 const int offset) 982 { 983 struct ieee80211_local *local = sdata->local; 984 u32 flags = sdata->u.mntr.flags; 985 986 #define ADJUST(_f, _s) do { \ 987 if (flags & MONITOR_FLAG_##_f) \ 988 local->fif_##_s += offset; \ 989 } while (0) 990 991 ADJUST(FCSFAIL, fcsfail); 992 ADJUST(PLCPFAIL, plcpfail); 993 ADJUST(CONTROL, control); 994 ADJUST(CONTROL, pspoll); 995 ADJUST(OTHER_BSS, other_bss); 996 997 #undef ADJUST 998 } 999 1000 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 1001 { 1002 struct ieee80211_local *local = sdata->local; 1003 int i; 1004 1005 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 1006 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 1007 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 1008 else if (local->hw.queues >= IEEE80211_NUM_ACS) 1009 sdata->vif.hw_queue[i] = i; 1010 else 1011 sdata->vif.hw_queue[i] = 0; 1012 } 1013 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 1014 } 1015 1016 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 1017 { 1018 struct ieee80211_sub_if_data *sdata; 1019 int ret; 1020 1021 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 1022 return 0; 1023 1024 ASSERT_RTNL(); 1025 lockdep_assert_wiphy(local->hw.wiphy); 1026 1027 if (local->monitor_sdata) 1028 return 0; 1029 1030 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 1031 if (!sdata) 1032 return -ENOMEM; 1033 1034 /* set up data */ 1035 sdata->local = local; 1036 sdata->vif.type = NL80211_IFTYPE_MONITOR; 1037 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 1038 wiphy_name(local->hw.wiphy)); 1039 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 1040 1041 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1042 1043 ieee80211_set_default_queues(sdata); 1044 1045 ret = drv_add_interface(local, sdata); 1046 if (WARN_ON(ret)) { 1047 /* ok .. stupid driver, it asked for this! */ 1048 kfree(sdata); 1049 return ret; 1050 } 1051 1052 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1053 1054 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 1055 if (ret) { 1056 kfree(sdata); 1057 return ret; 1058 } 1059 1060 mutex_lock(&local->iflist_mtx); 1061 rcu_assign_pointer(local->monitor_sdata, sdata); 1062 mutex_unlock(&local->iflist_mtx); 1063 1064 mutex_lock(&local->mtx); 1065 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 1066 IEEE80211_CHANCTX_EXCLUSIVE); 1067 mutex_unlock(&local->mtx); 1068 if (ret) { 1069 mutex_lock(&local->iflist_mtx); 1070 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1071 mutex_unlock(&local->iflist_mtx); 1072 synchronize_net(); 1073 drv_remove_interface(local, sdata); 1074 kfree(sdata); 1075 return ret; 1076 } 1077 1078 skb_queue_head_init(&sdata->skb_queue); 1079 skb_queue_head_init(&sdata->status_queue); 1080 INIT_WORK(&sdata->work, ieee80211_iface_work); 1081 1082 return 0; 1083 } 1084 1085 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 1086 { 1087 struct ieee80211_sub_if_data *sdata; 1088 1089 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 1090 return; 1091 1092 ASSERT_RTNL(); 1093 lockdep_assert_wiphy(local->hw.wiphy); 1094 1095 mutex_lock(&local->iflist_mtx); 1096 1097 sdata = rcu_dereference_protected(local->monitor_sdata, 1098 lockdep_is_held(&local->iflist_mtx)); 1099 if (!sdata) { 1100 mutex_unlock(&local->iflist_mtx); 1101 return; 1102 } 1103 1104 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1105 mutex_unlock(&local->iflist_mtx); 1106 1107 synchronize_net(); 1108 1109 mutex_lock(&local->mtx); 1110 ieee80211_vif_release_channel(sdata); 1111 mutex_unlock(&local->mtx); 1112 1113 drv_remove_interface(local, sdata); 1114 1115 kfree(sdata); 1116 } 1117 1118 /* 1119 * NOTE: Be very careful when changing this function, it must NOT return 1120 * an error on interface type changes that have been pre-checked, so most 1121 * checks should be in ieee80211_check_concurrent_iface. 1122 */ 1123 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1124 { 1125 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1126 struct net_device *dev = wdev->netdev; 1127 struct ieee80211_local *local = sdata->local; 1128 u32 changed = 0; 1129 int res; 1130 u32 hw_reconf_flags = 0; 1131 1132 switch (sdata->vif.type) { 1133 case NL80211_IFTYPE_AP_VLAN: { 1134 struct ieee80211_sub_if_data *master; 1135 1136 if (!sdata->bss) 1137 return -ENOLINK; 1138 1139 mutex_lock(&local->mtx); 1140 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1141 mutex_unlock(&local->mtx); 1142 1143 master = container_of(sdata->bss, 1144 struct ieee80211_sub_if_data, u.ap); 1145 sdata->control_port_protocol = 1146 master->control_port_protocol; 1147 sdata->control_port_no_encrypt = 1148 master->control_port_no_encrypt; 1149 sdata->control_port_over_nl80211 = 1150 master->control_port_over_nl80211; 1151 sdata->control_port_no_preauth = 1152 master->control_port_no_preauth; 1153 sdata->vif.cab_queue = master->vif.cab_queue; 1154 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1155 sizeof(sdata->vif.hw_queue)); 1156 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 1157 1158 mutex_lock(&local->key_mtx); 1159 sdata->crypto_tx_tailroom_needed_cnt += 1160 master->crypto_tx_tailroom_needed_cnt; 1161 mutex_unlock(&local->key_mtx); 1162 1163 break; 1164 } 1165 case NL80211_IFTYPE_AP: 1166 sdata->bss = &sdata->u.ap; 1167 break; 1168 case NL80211_IFTYPE_MESH_POINT: 1169 case NL80211_IFTYPE_STATION: 1170 case NL80211_IFTYPE_MONITOR: 1171 case NL80211_IFTYPE_ADHOC: 1172 case NL80211_IFTYPE_P2P_DEVICE: 1173 case NL80211_IFTYPE_OCB: 1174 case NL80211_IFTYPE_NAN: 1175 /* no special treatment */ 1176 break; 1177 case NL80211_IFTYPE_UNSPECIFIED: 1178 case NUM_NL80211_IFTYPES: 1179 case NL80211_IFTYPE_P2P_CLIENT: 1180 case NL80211_IFTYPE_P2P_GO: 1181 case NL80211_IFTYPE_WDS: 1182 /* cannot happen */ 1183 WARN_ON(1); 1184 break; 1185 } 1186 1187 if (local->open_count == 0) { 1188 res = drv_start(local); 1189 if (res) 1190 goto err_del_bss; 1191 /* we're brought up, everything changes */ 1192 hw_reconf_flags = ~0; 1193 ieee80211_led_radio(local, true); 1194 ieee80211_mod_tpt_led_trig(local, 1195 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1196 } 1197 1198 /* 1199 * Copy the hopefully now-present MAC address to 1200 * this interface, if it has the special null one. 1201 */ 1202 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1203 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr); 1204 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1205 1206 if (!is_valid_ether_addr(dev->dev_addr)) { 1207 res = -EADDRNOTAVAIL; 1208 goto err_stop; 1209 } 1210 } 1211 1212 switch (sdata->vif.type) { 1213 case NL80211_IFTYPE_AP_VLAN: 1214 /* no need to tell driver, but set carrier and chanctx */ 1215 if (rtnl_dereference(sdata->bss->beacon)) { 1216 ieee80211_vif_vlan_copy_chanctx(sdata); 1217 netif_carrier_on(dev); 1218 ieee80211_set_vif_encap_ops(sdata); 1219 } else { 1220 netif_carrier_off(dev); 1221 } 1222 break; 1223 case NL80211_IFTYPE_MONITOR: 1224 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 1225 local->cooked_mntrs++; 1226 break; 1227 } 1228 1229 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 1230 res = drv_add_interface(local, sdata); 1231 if (res) 1232 goto err_stop; 1233 } else if (local->monitors == 0 && local->open_count == 0) { 1234 res = ieee80211_add_virtual_monitor(local); 1235 if (res) 1236 goto err_stop; 1237 } 1238 1239 /* must be before the call to ieee80211_configure_filter */ 1240 local->monitors++; 1241 if (local->monitors == 1) { 1242 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1243 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1244 } 1245 1246 ieee80211_adjust_monitor_flags(sdata, 1); 1247 ieee80211_configure_filter(local); 1248 ieee80211_recalc_offload(local); 1249 mutex_lock(&local->mtx); 1250 ieee80211_recalc_idle(local); 1251 mutex_unlock(&local->mtx); 1252 1253 netif_carrier_on(dev); 1254 break; 1255 default: 1256 if (coming_up) { 1257 ieee80211_del_virtual_monitor(local); 1258 ieee80211_set_sdata_offload_flags(sdata); 1259 1260 res = drv_add_interface(local, sdata); 1261 if (res) 1262 goto err_stop; 1263 1264 ieee80211_set_vif_encap_ops(sdata); 1265 res = ieee80211_check_queues(sdata, 1266 ieee80211_vif_type_p2p(&sdata->vif)); 1267 if (res) 1268 goto err_del_interface; 1269 } 1270 1271 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1272 local->fif_pspoll++; 1273 local->fif_probe_req++; 1274 1275 ieee80211_configure_filter(local); 1276 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1277 local->fif_probe_req++; 1278 } 1279 1280 if (sdata->vif.probe_req_reg) 1281 drv_config_iface_filter(local, sdata, 1282 FIF_PROBE_REQ, 1283 FIF_PROBE_REQ); 1284 1285 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1286 sdata->vif.type != NL80211_IFTYPE_NAN) 1287 changed |= ieee80211_reset_erp_info(sdata); 1288 ieee80211_bss_info_change_notify(sdata, changed); 1289 1290 switch (sdata->vif.type) { 1291 case NL80211_IFTYPE_STATION: 1292 case NL80211_IFTYPE_ADHOC: 1293 case NL80211_IFTYPE_AP: 1294 case NL80211_IFTYPE_MESH_POINT: 1295 case NL80211_IFTYPE_OCB: 1296 netif_carrier_off(dev); 1297 break; 1298 case NL80211_IFTYPE_P2P_DEVICE: 1299 case NL80211_IFTYPE_NAN: 1300 break; 1301 default: 1302 /* not reached */ 1303 WARN_ON(1); 1304 } 1305 1306 /* 1307 * Set default queue parameters so drivers don't 1308 * need to initialise the hardware if the hardware 1309 * doesn't start up with sane defaults. 1310 * Enable QoS for anything but station interfaces. 1311 */ 1312 ieee80211_set_wmm_default(sdata, true, 1313 sdata->vif.type != NL80211_IFTYPE_STATION); 1314 } 1315 1316 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1317 1318 switch (sdata->vif.type) { 1319 case NL80211_IFTYPE_P2P_DEVICE: 1320 rcu_assign_pointer(local->p2p_sdata, sdata); 1321 break; 1322 case NL80211_IFTYPE_MONITOR: 1323 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 1324 break; 1325 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1326 break; 1327 default: 1328 break; 1329 } 1330 1331 /* 1332 * set_multicast_list will be invoked by the networking core 1333 * which will check whether any increments here were done in 1334 * error and sync them down to the hardware as filter flags. 1335 */ 1336 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1337 atomic_inc(&local->iff_allmultis); 1338 1339 if (coming_up) 1340 local->open_count++; 1341 1342 if (hw_reconf_flags) 1343 ieee80211_hw_config(local, hw_reconf_flags); 1344 1345 ieee80211_recalc_ps(local); 1346 1347 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1348 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1349 local->ops->wake_tx_queue) { 1350 /* XXX: for AP_VLAN, actually track AP queues */ 1351 if (dev) 1352 netif_tx_start_all_queues(dev); 1353 } else if (dev) { 1354 unsigned long flags; 1355 int n_acs = IEEE80211_NUM_ACS; 1356 int ac; 1357 1358 if (local->hw.queues < IEEE80211_NUM_ACS) 1359 n_acs = 1; 1360 1361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1362 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 1363 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 1364 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 1365 for (ac = 0; ac < n_acs; ac++) { 1366 int ac_queue = sdata->vif.hw_queue[ac]; 1367 1368 if (local->queue_stop_reasons[ac_queue] == 0 && 1369 skb_queue_empty(&local->pending[ac_queue])) 1370 netif_start_subqueue(dev, ac); 1371 } 1372 } 1373 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1374 } 1375 1376 return 0; 1377 err_del_interface: 1378 drv_remove_interface(local, sdata); 1379 err_stop: 1380 if (!local->open_count) 1381 drv_stop(local); 1382 err_del_bss: 1383 sdata->bss = NULL; 1384 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1385 mutex_lock(&local->mtx); 1386 list_del(&sdata->u.vlan.list); 1387 mutex_unlock(&local->mtx); 1388 } 1389 /* might already be clear but that doesn't matter */ 1390 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1391 return res; 1392 } 1393 1394 static void ieee80211_if_free(struct net_device *dev) 1395 { 1396 free_percpu(dev->tstats); 1397 } 1398 1399 static void ieee80211_if_setup(struct net_device *dev) 1400 { 1401 ether_setup(dev); 1402 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1403 dev->netdev_ops = &ieee80211_dataif_ops; 1404 dev->needs_free_netdev = true; 1405 dev->priv_destructor = ieee80211_if_free; 1406 } 1407 1408 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1409 { 1410 ieee80211_if_setup(dev); 1411 dev->priv_flags |= IFF_NO_QUEUE; 1412 } 1413 1414 static void ieee80211_iface_process_skb(struct ieee80211_local *local, 1415 struct ieee80211_sub_if_data *sdata, 1416 struct sk_buff *skb) 1417 { 1418 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1419 1420 if (ieee80211_is_action(mgmt->frame_control) && 1421 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1422 struct sta_info *sta; 1423 int len = skb->len; 1424 1425 mutex_lock(&local->sta_mtx); 1426 sta = sta_info_get_bss(sdata, mgmt->sa); 1427 if (sta) { 1428 switch (mgmt->u.action.u.addba_req.action_code) { 1429 case WLAN_ACTION_ADDBA_REQ: 1430 ieee80211_process_addba_request(local, sta, 1431 mgmt, len); 1432 break; 1433 case WLAN_ACTION_ADDBA_RESP: 1434 ieee80211_process_addba_resp(local, sta, 1435 mgmt, len); 1436 break; 1437 case WLAN_ACTION_DELBA: 1438 ieee80211_process_delba(sdata, sta, 1439 mgmt, len); 1440 break; 1441 default: 1442 WARN_ON(1); 1443 break; 1444 } 1445 } 1446 mutex_unlock(&local->sta_mtx); 1447 } else if (ieee80211_is_action(mgmt->frame_control) && 1448 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1449 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1450 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1451 struct ieee80211_rx_status *status; 1452 enum nl80211_band band; 1453 struct sta_info *sta; 1454 u8 opmode; 1455 1456 status = IEEE80211_SKB_RXCB(skb); 1457 band = status->band; 1458 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1459 1460 mutex_lock(&local->sta_mtx); 1461 sta = sta_info_get_bss(sdata, mgmt->sa); 1462 1463 if (sta) 1464 ieee80211_vht_handle_opmode(sdata, sta, opmode, 1465 band); 1466 1467 mutex_unlock(&local->sta_mtx); 1468 break; 1469 } 1470 case WLAN_VHT_ACTION_GROUPID_MGMT: 1471 ieee80211_process_mu_groups(sdata, mgmt); 1472 break; 1473 default: 1474 WARN_ON(1); 1475 break; 1476 } 1477 } else if (ieee80211_is_action(mgmt->frame_control) && 1478 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1479 switch (mgmt->u.action.u.s1g.action_code) { 1480 case WLAN_S1G_TWT_TEARDOWN: 1481 case WLAN_S1G_TWT_SETUP: 1482 ieee80211_s1g_rx_twt_action(sdata, skb); 1483 break; 1484 default: 1485 break; 1486 } 1487 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1488 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1489 ieee80211_sta_rx_queued_ext(sdata, skb); 1490 else 1491 WARN_ON(1); 1492 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1493 struct ieee80211_hdr *hdr = (void *)mgmt; 1494 struct sta_info *sta; 1495 1496 /* 1497 * So the frame isn't mgmt, but frame_control 1498 * is at the right place anyway, of course, so 1499 * the if statement is correct. 1500 * 1501 * Warn if we have other data frame types here, 1502 * they must not get here. 1503 */ 1504 WARN_ON(hdr->frame_control & 1505 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1506 WARN_ON(!(hdr->seq_ctrl & 1507 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1508 /* 1509 * This was a fragment of a frame, received while 1510 * a block-ack session was active. That cannot be 1511 * right, so terminate the session. 1512 */ 1513 mutex_lock(&local->sta_mtx); 1514 sta = sta_info_get_bss(sdata, mgmt->sa); 1515 if (sta) { 1516 u16 tid = ieee80211_get_tid(hdr); 1517 1518 __ieee80211_stop_rx_ba_session( 1519 sta, tid, WLAN_BACK_RECIPIENT, 1520 WLAN_REASON_QSTA_REQUIRE_SETUP, 1521 true); 1522 } 1523 mutex_unlock(&local->sta_mtx); 1524 } else switch (sdata->vif.type) { 1525 case NL80211_IFTYPE_STATION: 1526 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1527 break; 1528 case NL80211_IFTYPE_ADHOC: 1529 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1530 break; 1531 case NL80211_IFTYPE_MESH_POINT: 1532 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1533 break; 1534 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1535 break; 1536 default: 1537 WARN(1, "frame for unexpected interface type"); 1538 break; 1539 } 1540 } 1541 1542 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata, 1543 struct sk_buff *skb) 1544 { 1545 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1546 1547 if (ieee80211_is_action(mgmt->frame_control) && 1548 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1549 switch (mgmt->u.action.u.s1g.action_code) { 1550 case WLAN_S1G_TWT_TEARDOWN: 1551 case WLAN_S1G_TWT_SETUP: 1552 ieee80211_s1g_status_twt_action(sdata, skb); 1553 break; 1554 default: 1555 break; 1556 } 1557 } 1558 } 1559 1560 static void ieee80211_iface_work(struct work_struct *work) 1561 { 1562 struct ieee80211_sub_if_data *sdata = 1563 container_of(work, struct ieee80211_sub_if_data, work); 1564 struct ieee80211_local *local = sdata->local; 1565 struct sk_buff *skb; 1566 1567 if (!ieee80211_sdata_running(sdata)) 1568 return; 1569 1570 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1571 return; 1572 1573 if (!ieee80211_can_run_worker(local)) 1574 return; 1575 1576 /* first process frames */ 1577 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1578 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1579 1580 if (skb->protocol == cpu_to_be16(ETH_P_TDLS)) 1581 ieee80211_process_tdls_channel_switch(sdata, skb); 1582 else 1583 ieee80211_iface_process_skb(local, sdata, skb); 1584 1585 kfree_skb(skb); 1586 kcov_remote_stop(); 1587 } 1588 1589 /* process status queue */ 1590 while ((skb = skb_dequeue(&sdata->status_queue))) { 1591 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1592 1593 ieee80211_iface_process_status(sdata, skb); 1594 kfree_skb(skb); 1595 1596 kcov_remote_stop(); 1597 } 1598 1599 /* then other type-dependent work */ 1600 switch (sdata->vif.type) { 1601 case NL80211_IFTYPE_STATION: 1602 ieee80211_sta_work(sdata); 1603 break; 1604 case NL80211_IFTYPE_ADHOC: 1605 ieee80211_ibss_work(sdata); 1606 break; 1607 case NL80211_IFTYPE_MESH_POINT: 1608 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1609 break; 1610 ieee80211_mesh_work(sdata); 1611 break; 1612 case NL80211_IFTYPE_OCB: 1613 ieee80211_ocb_work(sdata); 1614 break; 1615 default: 1616 break; 1617 } 1618 } 1619 1620 static void ieee80211_recalc_smps_work(struct work_struct *work) 1621 { 1622 struct ieee80211_sub_if_data *sdata = 1623 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1624 1625 ieee80211_recalc_smps(sdata); 1626 } 1627 1628 /* 1629 * Helper function to initialise an interface to a specific type. 1630 */ 1631 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1632 enum nl80211_iftype type) 1633 { 1634 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1635 0xff, 0xff, 0xff}; 1636 1637 /* clear type-dependent union */ 1638 memset(&sdata->u, 0, sizeof(sdata->u)); 1639 1640 /* and set some type-dependent values */ 1641 sdata->vif.type = type; 1642 sdata->vif.p2p = false; 1643 sdata->wdev.iftype = type; 1644 1645 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1646 sdata->control_port_no_encrypt = false; 1647 sdata->control_port_over_nl80211 = false; 1648 sdata->control_port_no_preauth = false; 1649 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1650 sdata->vif.bss_conf.idle = true; 1651 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1652 1653 sdata->noack_map = 0; 1654 1655 /* only monitor/p2p-device differ */ 1656 if (sdata->dev) { 1657 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1658 sdata->dev->type = ARPHRD_ETHER; 1659 } 1660 1661 skb_queue_head_init(&sdata->skb_queue); 1662 skb_queue_head_init(&sdata->status_queue); 1663 INIT_WORK(&sdata->work, ieee80211_iface_work); 1664 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1665 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1666 INIT_WORK(&sdata->color_change_finalize_work, ieee80211_color_change_finalize_work); 1667 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1668 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1669 1670 switch (type) { 1671 case NL80211_IFTYPE_P2P_GO: 1672 type = NL80211_IFTYPE_AP; 1673 sdata->vif.type = type; 1674 sdata->vif.p2p = true; 1675 fallthrough; 1676 case NL80211_IFTYPE_AP: 1677 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1678 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1679 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1680 break; 1681 case NL80211_IFTYPE_P2P_CLIENT: 1682 type = NL80211_IFTYPE_STATION; 1683 sdata->vif.type = type; 1684 sdata->vif.p2p = true; 1685 fallthrough; 1686 case NL80211_IFTYPE_STATION: 1687 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1688 ieee80211_sta_setup_sdata(sdata); 1689 break; 1690 case NL80211_IFTYPE_OCB: 1691 sdata->vif.bss_conf.bssid = bssid_wildcard; 1692 ieee80211_ocb_setup_sdata(sdata); 1693 break; 1694 case NL80211_IFTYPE_ADHOC: 1695 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1696 ieee80211_ibss_setup_sdata(sdata); 1697 break; 1698 case NL80211_IFTYPE_MESH_POINT: 1699 if (ieee80211_vif_is_mesh(&sdata->vif)) 1700 ieee80211_mesh_init_sdata(sdata); 1701 break; 1702 case NL80211_IFTYPE_MONITOR: 1703 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1704 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1705 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1706 MONITOR_FLAG_OTHER_BSS; 1707 break; 1708 case NL80211_IFTYPE_NAN: 1709 idr_init(&sdata->u.nan.function_inst_ids); 1710 spin_lock_init(&sdata->u.nan.func_lock); 1711 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1712 break; 1713 case NL80211_IFTYPE_AP_VLAN: 1714 case NL80211_IFTYPE_P2P_DEVICE: 1715 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1716 break; 1717 case NL80211_IFTYPE_UNSPECIFIED: 1718 case NL80211_IFTYPE_WDS: 1719 case NUM_NL80211_IFTYPES: 1720 WARN_ON(1); 1721 break; 1722 } 1723 1724 ieee80211_debugfs_add_netdev(sdata); 1725 } 1726 1727 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1728 enum nl80211_iftype type) 1729 { 1730 struct ieee80211_local *local = sdata->local; 1731 int ret, err; 1732 enum nl80211_iftype internal_type = type; 1733 bool p2p = false; 1734 1735 ASSERT_RTNL(); 1736 1737 if (!local->ops->change_interface) 1738 return -EBUSY; 1739 1740 switch (sdata->vif.type) { 1741 case NL80211_IFTYPE_AP: 1742 if (!list_empty(&sdata->u.ap.vlans)) 1743 return -EBUSY; 1744 break; 1745 case NL80211_IFTYPE_STATION: 1746 case NL80211_IFTYPE_ADHOC: 1747 case NL80211_IFTYPE_OCB: 1748 /* 1749 * Could maybe also all others here? 1750 * Just not sure how that interacts 1751 * with the RX/config path e.g. for 1752 * mesh. 1753 */ 1754 break; 1755 default: 1756 return -EBUSY; 1757 } 1758 1759 switch (type) { 1760 case NL80211_IFTYPE_AP: 1761 case NL80211_IFTYPE_STATION: 1762 case NL80211_IFTYPE_ADHOC: 1763 case NL80211_IFTYPE_OCB: 1764 /* 1765 * Could probably support everything 1766 * but here. 1767 */ 1768 break; 1769 case NL80211_IFTYPE_P2P_CLIENT: 1770 p2p = true; 1771 internal_type = NL80211_IFTYPE_STATION; 1772 break; 1773 case NL80211_IFTYPE_P2P_GO: 1774 p2p = true; 1775 internal_type = NL80211_IFTYPE_AP; 1776 break; 1777 default: 1778 return -EBUSY; 1779 } 1780 1781 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1782 if (ret) 1783 return ret; 1784 1785 ieee80211_stop_vif_queues(local, sdata, 1786 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1787 synchronize_net(); 1788 1789 ieee80211_do_stop(sdata, false); 1790 1791 ieee80211_teardown_sdata(sdata); 1792 1793 ieee80211_set_sdata_offload_flags(sdata); 1794 ret = drv_change_interface(local, sdata, internal_type, p2p); 1795 if (ret) 1796 type = ieee80211_vif_type_p2p(&sdata->vif); 1797 1798 /* 1799 * Ignore return value here, there's not much we can do since 1800 * the driver changed the interface type internally already. 1801 * The warnings will hopefully make driver authors fix it :-) 1802 */ 1803 ieee80211_check_queues(sdata, type); 1804 1805 ieee80211_setup_sdata(sdata, type); 1806 ieee80211_set_vif_encap_ops(sdata); 1807 1808 err = ieee80211_do_open(&sdata->wdev, false); 1809 WARN(err, "type change: do_open returned %d", err); 1810 1811 ieee80211_wake_vif_queues(local, sdata, 1812 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1813 return ret; 1814 } 1815 1816 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1817 enum nl80211_iftype type) 1818 { 1819 int ret; 1820 1821 ASSERT_RTNL(); 1822 1823 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1824 return 0; 1825 1826 if (ieee80211_sdata_running(sdata)) { 1827 ret = ieee80211_runtime_change_iftype(sdata, type); 1828 if (ret) 1829 return ret; 1830 } else { 1831 /* Purge and reset type-dependent state. */ 1832 ieee80211_teardown_sdata(sdata); 1833 ieee80211_setup_sdata(sdata, type); 1834 } 1835 1836 /* reset some values that shouldn't be kept across type changes */ 1837 if (type == NL80211_IFTYPE_STATION) 1838 sdata->u.mgd.use_4addr = false; 1839 1840 return 0; 1841 } 1842 1843 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1844 u8 *perm_addr, enum nl80211_iftype type) 1845 { 1846 struct ieee80211_sub_if_data *sdata; 1847 u64 mask, start, addr, val, inc; 1848 u8 *m; 1849 u8 tmp_addr[ETH_ALEN]; 1850 int i; 1851 1852 /* default ... something at least */ 1853 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1854 1855 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1856 local->hw.wiphy->n_addresses <= 1) 1857 return; 1858 1859 mutex_lock(&local->iflist_mtx); 1860 1861 switch (type) { 1862 case NL80211_IFTYPE_MONITOR: 1863 /* doesn't matter */ 1864 break; 1865 case NL80211_IFTYPE_AP_VLAN: 1866 /* match up with an AP interface */ 1867 list_for_each_entry(sdata, &local->interfaces, list) { 1868 if (sdata->vif.type != NL80211_IFTYPE_AP) 1869 continue; 1870 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1871 break; 1872 } 1873 /* keep default if no AP interface present */ 1874 break; 1875 case NL80211_IFTYPE_P2P_CLIENT: 1876 case NL80211_IFTYPE_P2P_GO: 1877 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1878 list_for_each_entry(sdata, &local->interfaces, list) { 1879 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1880 continue; 1881 if (!ieee80211_sdata_running(sdata)) 1882 continue; 1883 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1884 goto out_unlock; 1885 } 1886 } 1887 fallthrough; 1888 default: 1889 /* assign a new address if possible -- try n_addresses first */ 1890 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1891 bool used = false; 1892 1893 list_for_each_entry(sdata, &local->interfaces, list) { 1894 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1895 sdata->vif.addr)) { 1896 used = true; 1897 break; 1898 } 1899 } 1900 1901 if (!used) { 1902 memcpy(perm_addr, 1903 local->hw.wiphy->addresses[i].addr, 1904 ETH_ALEN); 1905 break; 1906 } 1907 } 1908 1909 /* try mask if available */ 1910 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1911 break; 1912 1913 m = local->hw.wiphy->addr_mask; 1914 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1915 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1916 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1917 1918 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1919 /* not a contiguous mask ... not handled now! */ 1920 pr_info("not contiguous\n"); 1921 break; 1922 } 1923 1924 /* 1925 * Pick address of existing interface in case user changed 1926 * MAC address manually, default to perm_addr. 1927 */ 1928 m = local->hw.wiphy->perm_addr; 1929 list_for_each_entry(sdata, &local->interfaces, list) { 1930 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1931 continue; 1932 m = sdata->vif.addr; 1933 break; 1934 } 1935 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1936 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1937 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1938 1939 inc = 1ULL<<__ffs64(mask); 1940 val = (start & mask); 1941 addr = (start & ~mask) | (val & mask); 1942 do { 1943 bool used = false; 1944 1945 tmp_addr[5] = addr >> 0*8; 1946 tmp_addr[4] = addr >> 1*8; 1947 tmp_addr[3] = addr >> 2*8; 1948 tmp_addr[2] = addr >> 3*8; 1949 tmp_addr[1] = addr >> 4*8; 1950 tmp_addr[0] = addr >> 5*8; 1951 1952 val += inc; 1953 1954 list_for_each_entry(sdata, &local->interfaces, list) { 1955 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1956 used = true; 1957 break; 1958 } 1959 } 1960 1961 if (!used) { 1962 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1963 break; 1964 } 1965 addr = (start & ~mask) | (val & mask); 1966 } while (addr != start); 1967 1968 break; 1969 } 1970 1971 out_unlock: 1972 mutex_unlock(&local->iflist_mtx); 1973 } 1974 1975 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1976 unsigned char name_assign_type, 1977 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1978 struct vif_params *params) 1979 { 1980 struct net_device *ndev = NULL; 1981 struct ieee80211_sub_if_data *sdata = NULL; 1982 struct txq_info *txqi; 1983 void (*if_setup)(struct net_device *dev); 1984 int ret, i; 1985 int txqs = 1; 1986 1987 ASSERT_RTNL(); 1988 1989 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1990 struct wireless_dev *wdev; 1991 1992 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1993 GFP_KERNEL); 1994 if (!sdata) 1995 return -ENOMEM; 1996 wdev = &sdata->wdev; 1997 1998 sdata->dev = NULL; 1999 strlcpy(sdata->name, name, IFNAMSIZ); 2000 ieee80211_assign_perm_addr(local, wdev->address, type); 2001 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 2002 } else { 2003 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2004 sizeof(void *)); 2005 int txq_size = 0; 2006 2007 if (local->ops->wake_tx_queue && 2008 type != NL80211_IFTYPE_AP_VLAN && 2009 (type != NL80211_IFTYPE_MONITOR || 2010 (params->flags & MONITOR_FLAG_ACTIVE))) 2011 txq_size += sizeof(struct txq_info) + 2012 local->hw.txq_data_size; 2013 2014 if (local->ops->wake_tx_queue) { 2015 if_setup = ieee80211_if_setup_no_queue; 2016 } else { 2017 if_setup = ieee80211_if_setup; 2018 if (local->hw.queues >= IEEE80211_NUM_ACS) 2019 txqs = IEEE80211_NUM_ACS; 2020 } 2021 2022 ndev = alloc_netdev_mqs(size + txq_size, 2023 name, name_assign_type, 2024 if_setup, txqs, 1); 2025 if (!ndev) 2026 return -ENOMEM; 2027 2028 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 2029 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 2030 2031 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 2032 2033 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2034 if (!ndev->tstats) { 2035 free_netdev(ndev); 2036 return -ENOMEM; 2037 } 2038 2039 ndev->needed_headroom = local->tx_headroom + 2040 4*6 /* four MAC addresses */ 2041 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 2042 + 6 /* mesh */ 2043 + 8 /* rfc1042/bridge tunnel */ 2044 - ETH_HLEN /* ethernet hard_header_len */ 2045 + IEEE80211_ENCRYPT_HEADROOM; 2046 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 2047 2048 ret = dev_alloc_name(ndev, ndev->name); 2049 if (ret < 0) { 2050 ieee80211_if_free(ndev); 2051 free_netdev(ndev); 2052 return ret; 2053 } 2054 2055 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 2056 if (is_valid_ether_addr(params->macaddr)) 2057 eth_hw_addr_set(ndev, params->macaddr); 2058 else 2059 eth_hw_addr_set(ndev, ndev->perm_addr); 2060 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 2061 2062 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 2063 sdata = netdev_priv(ndev); 2064 ndev->ieee80211_ptr = &sdata->wdev; 2065 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 2066 memcpy(sdata->name, ndev->name, IFNAMSIZ); 2067 2068 if (txq_size) { 2069 txqi = netdev_priv(ndev) + size; 2070 ieee80211_txq_init(sdata, NULL, txqi, 0); 2071 } 2072 2073 sdata->dev = ndev; 2074 } 2075 2076 /* initialise type-independent data */ 2077 sdata->wdev.wiphy = local->hw.wiphy; 2078 sdata->local = local; 2079 2080 ieee80211_init_frag_cache(&sdata->frags); 2081 2082 INIT_LIST_HEAD(&sdata->key_list); 2083 2084 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 2085 ieee80211_dfs_cac_timer_work); 2086 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 2087 ieee80211_delayed_tailroom_dec); 2088 2089 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2090 struct ieee80211_supported_band *sband; 2091 sband = local->hw.wiphy->bands[i]; 2092 sdata->rc_rateidx_mask[i] = 2093 sband ? (1 << sband->n_bitrates) - 1 : 0; 2094 if (sband) { 2095 __le16 cap; 2096 u16 *vht_rate_mask; 2097 2098 memcpy(sdata->rc_rateidx_mcs_mask[i], 2099 sband->ht_cap.mcs.rx_mask, 2100 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2101 2102 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 2103 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 2104 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 2105 } else { 2106 memset(sdata->rc_rateidx_mcs_mask[i], 0, 2107 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2108 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 2109 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 2110 } 2111 } 2112 2113 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2114 init_airtime_info(&sdata->airtime[i], &local->airtime[i]); 2115 2116 ieee80211_set_default_queues(sdata); 2117 2118 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2119 sdata->user_power_level = local->user_power_level; 2120 2121 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2122 2123 /* setup type-dependent data */ 2124 ieee80211_setup_sdata(sdata, type); 2125 2126 if (ndev) { 2127 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 2128 if (type == NL80211_IFTYPE_STATION) 2129 sdata->u.mgd.use_4addr = params->use_4addr; 2130 2131 ndev->features |= local->hw.netdev_features; 2132 ndev->hw_features |= ndev->features & 2133 MAC80211_SUPPORTED_FEATURES_TX; 2134 2135 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 2136 2137 /* MTU range is normally 256 - 2304, where the upper limit is 2138 * the maximum MSDU size. Monitor interfaces send and receive 2139 * MPDU and A-MSDU frames which may be much larger so we do 2140 * not impose an upper limit in that case. 2141 */ 2142 ndev->min_mtu = 256; 2143 if (type == NL80211_IFTYPE_MONITOR) 2144 ndev->max_mtu = 0; 2145 else 2146 ndev->max_mtu = local->hw.max_mtu; 2147 2148 ret = cfg80211_register_netdevice(ndev); 2149 if (ret) { 2150 free_netdev(ndev); 2151 return ret; 2152 } 2153 } 2154 2155 mutex_lock(&local->iflist_mtx); 2156 list_add_tail_rcu(&sdata->list, &local->interfaces); 2157 mutex_unlock(&local->iflist_mtx); 2158 2159 if (new_wdev) 2160 *new_wdev = &sdata->wdev; 2161 2162 return 0; 2163 } 2164 2165 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2166 { 2167 ASSERT_RTNL(); 2168 2169 mutex_lock(&sdata->local->iflist_mtx); 2170 list_del_rcu(&sdata->list); 2171 mutex_unlock(&sdata->local->iflist_mtx); 2172 2173 if (sdata->vif.txq) 2174 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2175 2176 synchronize_rcu(); 2177 2178 cfg80211_unregister_wdev(&sdata->wdev); 2179 2180 if (!sdata->dev) { 2181 ieee80211_teardown_sdata(sdata); 2182 kfree(sdata); 2183 } 2184 } 2185 2186 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2187 { 2188 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2189 return; 2190 ieee80211_do_stop(sdata, true); 2191 } 2192 2193 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2194 { 2195 struct ieee80211_sub_if_data *sdata, *tmp; 2196 LIST_HEAD(unreg_list); 2197 LIST_HEAD(wdev_list); 2198 2199 ASSERT_RTNL(); 2200 2201 /* Before destroying the interfaces, make sure they're all stopped so 2202 * that the hardware is stopped. Otherwise, the driver might still be 2203 * iterating the interfaces during the shutdown, e.g. from a worker 2204 * or from RX processing or similar, and if it does so (using atomic 2205 * iteration) while we're manipulating the list, the iteration will 2206 * crash. 2207 * 2208 * After this, the hardware should be stopped and the driver should 2209 * have stopped all of its activities, so that we can do RCU-unaware 2210 * manipulations of the interface list below. 2211 */ 2212 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2213 2214 WARN(local->open_count, "%s: open count remains %d\n", 2215 wiphy_name(local->hw.wiphy), local->open_count); 2216 2217 ieee80211_txq_teardown_flows(local); 2218 2219 mutex_lock(&local->iflist_mtx); 2220 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2221 list_del(&sdata->list); 2222 2223 if (sdata->dev) 2224 unregister_netdevice_queue(sdata->dev, &unreg_list); 2225 else 2226 list_add(&sdata->list, &wdev_list); 2227 } 2228 mutex_unlock(&local->iflist_mtx); 2229 2230 unregister_netdevice_many(&unreg_list); 2231 2232 wiphy_lock(local->hw.wiphy); 2233 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2234 list_del(&sdata->list); 2235 cfg80211_unregister_wdev(&sdata->wdev); 2236 kfree(sdata); 2237 } 2238 wiphy_unlock(local->hw.wiphy); 2239 } 2240 2241 static int netdev_notify(struct notifier_block *nb, 2242 unsigned long state, void *ptr) 2243 { 2244 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2245 struct ieee80211_sub_if_data *sdata; 2246 2247 if (state != NETDEV_CHANGENAME) 2248 return NOTIFY_DONE; 2249 2250 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2251 return NOTIFY_DONE; 2252 2253 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2254 return NOTIFY_DONE; 2255 2256 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2257 memcpy(sdata->name, dev->name, IFNAMSIZ); 2258 ieee80211_debugfs_rename_netdev(sdata); 2259 2260 return NOTIFY_OK; 2261 } 2262 2263 static struct notifier_block mac80211_netdev_notifier = { 2264 .notifier_call = netdev_notify, 2265 }; 2266 2267 int ieee80211_iface_init(void) 2268 { 2269 return register_netdevice_notifier(&mac80211_netdev_notifier); 2270 } 2271 2272 void ieee80211_iface_exit(void) 2273 { 2274 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2275 } 2276 2277 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2278 { 2279 if (sdata->vif.type == NL80211_IFTYPE_AP) 2280 atomic_inc(&sdata->u.ap.num_mcast_sta); 2281 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2282 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2283 } 2284 2285 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2286 { 2287 if (sdata->vif.type == NL80211_IFTYPE_AP) 2288 atomic_dec(&sdata->u.ap.num_mcast_sta); 2289 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2290 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2291 } 2292