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) 2018-2020 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 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 381 382 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 383 if (cancel_scan) 384 ieee80211_scan_cancel(local); 385 386 /* 387 * Stop TX on this interface first. 388 */ 389 if (sdata->dev) 390 netif_tx_stop_all_queues(sdata->dev); 391 392 ieee80211_roc_purge(local, sdata); 393 394 switch (sdata->vif.type) { 395 case NL80211_IFTYPE_STATION: 396 ieee80211_mgd_stop(sdata); 397 break; 398 case NL80211_IFTYPE_ADHOC: 399 ieee80211_ibss_stop(sdata); 400 break; 401 case NL80211_IFTYPE_MONITOR: 402 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 403 break; 404 list_del_rcu(&sdata->u.mntr.list); 405 break; 406 default: 407 break; 408 } 409 410 /* 411 * Remove all stations associated with this interface. 412 * 413 * This must be done before calling ops->remove_interface() 414 * because otherwise we can later invoke ops->sta_notify() 415 * whenever the STAs are removed, and that invalidates driver 416 * assumptions about always getting a vif pointer that is valid 417 * (because if we remove a STA after ops->remove_interface() 418 * the driver will have removed the vif info already!) 419 * 420 * For AP_VLANs stations may exist since there's nothing else that 421 * would have removed them, but in other modes there shouldn't 422 * be any stations. 423 */ 424 flushed = sta_info_flush(sdata); 425 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0); 426 427 /* don't count this interface for allmulti while it is down */ 428 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 429 atomic_dec(&local->iff_allmultis); 430 431 if (sdata->vif.type == NL80211_IFTYPE_AP) { 432 local->fif_pspoll--; 433 local->fif_probe_req--; 434 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 435 local->fif_probe_req--; 436 } 437 438 if (sdata->dev) { 439 netif_addr_lock_bh(sdata->dev); 440 spin_lock_bh(&local->filter_lock); 441 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 442 sdata->dev->addr_len); 443 spin_unlock_bh(&local->filter_lock); 444 netif_addr_unlock_bh(sdata->dev); 445 } 446 447 del_timer_sync(&local->dynamic_ps_timer); 448 cancel_work_sync(&local->dynamic_ps_enable_work); 449 450 cancel_work_sync(&sdata->recalc_smps); 451 sdata_lock(sdata); 452 mutex_lock(&local->mtx); 453 sdata->vif.csa_active = false; 454 if (sdata->vif.type == NL80211_IFTYPE_STATION) 455 sdata->u.mgd.csa_waiting_bcn = false; 456 if (sdata->csa_block_tx) { 457 ieee80211_wake_vif_queues(local, sdata, 458 IEEE80211_QUEUE_STOP_REASON_CSA); 459 sdata->csa_block_tx = false; 460 } 461 mutex_unlock(&local->mtx); 462 sdata_unlock(sdata); 463 464 cancel_work_sync(&sdata->csa_finalize_work); 465 466 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 467 468 if (sdata->wdev.cac_started) { 469 chandef = sdata->vif.bss_conf.chandef; 470 WARN_ON(local->suspended); 471 mutex_lock(&local->mtx); 472 ieee80211_vif_release_channel(sdata); 473 mutex_unlock(&local->mtx); 474 cfg80211_cac_event(sdata->dev, &chandef, 475 NL80211_RADAR_CAC_ABORTED, 476 GFP_KERNEL); 477 } 478 479 /* APs need special treatment */ 480 if (sdata->vif.type == NL80211_IFTYPE_AP) { 481 struct ieee80211_sub_if_data *vlan, *tmpsdata; 482 483 /* down all dependent devices, that is VLANs */ 484 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 485 u.vlan.list) 486 dev_close(vlan->dev); 487 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 488 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 489 /* remove all packets in parent bc_buf pointing to this dev */ 490 ps = &sdata->bss->ps; 491 492 spin_lock_irqsave(&ps->bc_buf.lock, flags); 493 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 494 if (skb->dev == sdata->dev) { 495 __skb_unlink(skb, &ps->bc_buf); 496 local->total_ps_buffered--; 497 ieee80211_free_txskb(&local->hw, skb); 498 } 499 } 500 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 501 } 502 503 if (going_down) 504 local->open_count--; 505 506 switch (sdata->vif.type) { 507 case NL80211_IFTYPE_AP_VLAN: 508 mutex_lock(&local->mtx); 509 list_del(&sdata->u.vlan.list); 510 mutex_unlock(&local->mtx); 511 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 512 /* see comment in the default case below */ 513 ieee80211_free_keys(sdata, true); 514 /* no need to tell driver */ 515 break; 516 case NL80211_IFTYPE_MONITOR: 517 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 518 local->cooked_mntrs--; 519 break; 520 } 521 522 local->monitors--; 523 if (local->monitors == 0) { 524 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 525 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 526 } 527 528 ieee80211_adjust_monitor_flags(sdata, -1); 529 break; 530 case NL80211_IFTYPE_NAN: 531 /* clean all the functions */ 532 spin_lock_bh(&sdata->u.nan.func_lock); 533 534 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 535 idr_remove(&sdata->u.nan.function_inst_ids, i); 536 cfg80211_free_nan_func(func); 537 } 538 idr_destroy(&sdata->u.nan.function_inst_ids); 539 540 spin_unlock_bh(&sdata->u.nan.func_lock); 541 break; 542 case NL80211_IFTYPE_P2P_DEVICE: 543 /* relies on synchronize_rcu() below */ 544 RCU_INIT_POINTER(local->p2p_sdata, NULL); 545 fallthrough; 546 default: 547 cancel_work_sync(&sdata->work); 548 /* 549 * When we get here, the interface is marked down. 550 * Free the remaining keys, if there are any 551 * (which can happen in AP mode if userspace sets 552 * keys before the interface is operating) 553 * 554 * Force the key freeing to always synchronize_net() 555 * to wait for the RX path in case it is using this 556 * interface enqueuing frames at this very time on 557 * another CPU. 558 */ 559 ieee80211_free_keys(sdata, true); 560 skb_queue_purge(&sdata->skb_queue); 561 } 562 563 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 564 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 565 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 566 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 567 if (info->control.vif == &sdata->vif) { 568 __skb_unlink(skb, &local->pending[i]); 569 ieee80211_free_txskb(&local->hw, skb); 570 } 571 } 572 } 573 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 574 575 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 576 ieee80211_txq_remove_vlan(local, sdata); 577 578 sdata->bss = NULL; 579 580 if (local->open_count == 0) 581 ieee80211_clear_tx_pending(local); 582 583 sdata->vif.bss_conf.beacon_int = 0; 584 585 /* 586 * If the interface goes down while suspended, presumably because 587 * the device was unplugged and that happens before our resume, 588 * then the driver is already unconfigured and the remainder of 589 * this function isn't needed. 590 * XXX: what about WoWLAN? If the device has software state, e.g. 591 * memory allocated, it might expect teardown commands from 592 * mac80211 here? 593 */ 594 if (local->suspended) { 595 WARN_ON(local->wowlan); 596 WARN_ON(rtnl_dereference(local->monitor_sdata)); 597 return; 598 } 599 600 switch (sdata->vif.type) { 601 case NL80211_IFTYPE_AP_VLAN: 602 break; 603 case NL80211_IFTYPE_MONITOR: 604 if (local->monitors == 0) 605 ieee80211_del_virtual_monitor(local); 606 607 mutex_lock(&local->mtx); 608 ieee80211_recalc_idle(local); 609 mutex_unlock(&local->mtx); 610 611 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 612 break; 613 614 fallthrough; 615 default: 616 if (going_down) 617 drv_remove_interface(local, sdata); 618 } 619 620 ieee80211_recalc_ps(local); 621 622 if (cancel_scan) 623 flush_delayed_work(&local->scan_work); 624 625 if (local->open_count == 0) { 626 ieee80211_stop_device(local); 627 628 /* no reconfiguring after stop! */ 629 return; 630 } 631 632 /* do after stop to avoid reconfiguring when we stop anyway */ 633 ieee80211_configure_filter(local); 634 ieee80211_hw_config(local, hw_reconf_flags); 635 636 if (local->monitors == local->open_count) 637 ieee80211_add_virtual_monitor(local); 638 } 639 640 static int ieee80211_stop(struct net_device *dev) 641 { 642 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 643 644 wiphy_lock(sdata->local->hw.wiphy); 645 ieee80211_do_stop(sdata, true); 646 wiphy_unlock(sdata->local->hw.wiphy); 647 648 return 0; 649 } 650 651 static void ieee80211_set_multicast_list(struct net_device *dev) 652 { 653 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 654 struct ieee80211_local *local = sdata->local; 655 int allmulti, sdata_allmulti; 656 657 allmulti = !!(dev->flags & IFF_ALLMULTI); 658 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 659 660 if (allmulti != sdata_allmulti) { 661 if (dev->flags & IFF_ALLMULTI) 662 atomic_inc(&local->iff_allmultis); 663 else 664 atomic_dec(&local->iff_allmultis); 665 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 666 } 667 668 spin_lock_bh(&local->filter_lock); 669 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 670 spin_unlock_bh(&local->filter_lock); 671 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 672 } 673 674 /* 675 * Called when the netdev is removed or, by the code below, before 676 * the interface type changes. 677 */ 678 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 679 { 680 int i; 681 682 /* free extra data */ 683 ieee80211_free_keys(sdata, false); 684 685 ieee80211_debugfs_remove_netdev(sdata); 686 687 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 688 __skb_queue_purge(&sdata->fragments[i].skb_list); 689 sdata->fragment_next = 0; 690 691 if (ieee80211_vif_is_mesh(&sdata->vif)) 692 ieee80211_mesh_teardown_sdata(sdata); 693 } 694 695 static void ieee80211_uninit(struct net_device *dev) 696 { 697 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 698 } 699 700 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 701 struct sk_buff *skb, 702 struct net_device *sb_dev) 703 { 704 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 705 } 706 707 static void 708 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 709 { 710 dev_fetch_sw_netstats(stats, dev->tstats); 711 } 712 713 static const struct net_device_ops ieee80211_dataif_ops = { 714 .ndo_open = ieee80211_open, 715 .ndo_stop = ieee80211_stop, 716 .ndo_uninit = ieee80211_uninit, 717 .ndo_start_xmit = ieee80211_subif_start_xmit, 718 .ndo_set_rx_mode = ieee80211_set_multicast_list, 719 .ndo_set_mac_address = ieee80211_change_mac, 720 .ndo_select_queue = ieee80211_netdev_select_queue, 721 .ndo_get_stats64 = ieee80211_get_stats64, 722 }; 723 724 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 725 struct sk_buff *skb, 726 struct net_device *sb_dev) 727 { 728 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 729 struct ieee80211_local *local = sdata->local; 730 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 731 struct ieee80211_hdr *hdr; 732 int len_rthdr; 733 734 if (local->hw.queues < IEEE80211_NUM_ACS) 735 return 0; 736 737 /* reset flags and info before parsing radiotap header */ 738 memset(info, 0, sizeof(*info)); 739 740 if (!ieee80211_parse_tx_radiotap(skb, dev)) 741 return 0; /* doesn't matter, frame will be dropped */ 742 743 len_rthdr = ieee80211_get_radiotap_len(skb->data); 744 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 745 if (skb->len < len_rthdr + 2 || 746 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 747 return 0; /* doesn't matter, frame will be dropped */ 748 749 return ieee80211_select_queue_80211(sdata, skb, hdr); 750 } 751 752 static const struct net_device_ops ieee80211_monitorif_ops = { 753 .ndo_open = ieee80211_open, 754 .ndo_stop = ieee80211_stop, 755 .ndo_uninit = ieee80211_uninit, 756 .ndo_start_xmit = ieee80211_monitor_start_xmit, 757 .ndo_set_rx_mode = ieee80211_set_multicast_list, 758 .ndo_set_mac_address = ieee80211_change_mac, 759 .ndo_select_queue = ieee80211_monitor_select_queue, 760 .ndo_get_stats64 = ieee80211_get_stats64, 761 }; 762 763 static const struct net_device_ops ieee80211_dataif_8023_ops = { 764 .ndo_open = ieee80211_open, 765 .ndo_stop = ieee80211_stop, 766 .ndo_uninit = ieee80211_uninit, 767 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 768 .ndo_set_rx_mode = ieee80211_set_multicast_list, 769 .ndo_set_mac_address = ieee80211_change_mac, 770 .ndo_select_queue = ieee80211_netdev_select_queue, 771 .ndo_get_stats64 = ieee80211_get_stats64, 772 }; 773 774 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 775 { 776 switch (iftype) { 777 /* P2P GO and client are mapped to AP/STATION types */ 778 case NL80211_IFTYPE_AP: 779 case NL80211_IFTYPE_STATION: 780 return true; 781 default: 782 return false; 783 } 784 } 785 786 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 787 { 788 struct ieee80211_local *local = sdata->local; 789 u32 flags; 790 791 flags = sdata->vif.offload_flags; 792 793 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 794 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 795 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 796 797 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 798 local->hw.wiphy->frag_threshold != (u32)-1) 799 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 800 801 if (local->monitors) 802 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 803 } else { 804 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 805 } 806 807 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 808 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 809 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 810 811 if (local->monitors && 812 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP)) 813 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 814 } else { 815 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 816 } 817 818 if (sdata->vif.offload_flags == flags) 819 return false; 820 821 sdata->vif.offload_flags = flags; 822 ieee80211_check_fast_rx_iface(sdata); 823 return true; 824 } 825 826 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 827 { 828 struct ieee80211_local *local = sdata->local; 829 struct ieee80211_sub_if_data *bss = sdata; 830 bool enabled; 831 832 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 833 if (!sdata->bss) 834 return; 835 836 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 837 } 838 839 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 840 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 841 return; 842 843 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 844 if (sdata->wdev.use_4addr && 845 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 846 enabled = false; 847 848 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 849 &ieee80211_dataif_ops; 850 } 851 852 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 853 { 854 struct ieee80211_local *local = sdata->local; 855 struct ieee80211_sub_if_data *vsdata; 856 857 if (ieee80211_set_sdata_offload_flags(sdata)) { 858 drv_update_vif_offload(local, sdata); 859 ieee80211_set_vif_encap_ops(sdata); 860 } 861 862 list_for_each_entry(vsdata, &local->interfaces, list) { 863 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 864 vsdata->bss != &sdata->u.ap) 865 continue; 866 867 ieee80211_set_vif_encap_ops(vsdata); 868 } 869 } 870 871 void ieee80211_recalc_offload(struct ieee80211_local *local) 872 { 873 struct ieee80211_sub_if_data *sdata; 874 875 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 876 return; 877 878 mutex_lock(&local->iflist_mtx); 879 880 list_for_each_entry(sdata, &local->interfaces, list) { 881 if (!ieee80211_sdata_running(sdata)) 882 continue; 883 884 ieee80211_recalc_sdata_offload(sdata); 885 } 886 887 mutex_unlock(&local->iflist_mtx); 888 } 889 890 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 891 const int offset) 892 { 893 struct ieee80211_local *local = sdata->local; 894 u32 flags = sdata->u.mntr.flags; 895 896 #define ADJUST(_f, _s) do { \ 897 if (flags & MONITOR_FLAG_##_f) \ 898 local->fif_##_s += offset; \ 899 } while (0) 900 901 ADJUST(FCSFAIL, fcsfail); 902 ADJUST(PLCPFAIL, plcpfail); 903 ADJUST(CONTROL, control); 904 ADJUST(CONTROL, pspoll); 905 ADJUST(OTHER_BSS, other_bss); 906 907 #undef ADJUST 908 } 909 910 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 911 { 912 struct ieee80211_local *local = sdata->local; 913 int i; 914 915 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 916 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 917 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 918 else if (local->hw.queues >= IEEE80211_NUM_ACS) 919 sdata->vif.hw_queue[i] = i; 920 else 921 sdata->vif.hw_queue[i] = 0; 922 } 923 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 924 } 925 926 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 927 { 928 struct ieee80211_sub_if_data *sdata; 929 int ret; 930 931 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 932 return 0; 933 934 ASSERT_RTNL(); 935 936 if (local->monitor_sdata) 937 return 0; 938 939 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 940 if (!sdata) 941 return -ENOMEM; 942 943 /* set up data */ 944 sdata->local = local; 945 sdata->vif.type = NL80211_IFTYPE_MONITOR; 946 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 947 wiphy_name(local->hw.wiphy)); 948 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 949 950 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 951 952 ieee80211_set_default_queues(sdata); 953 954 ret = drv_add_interface(local, sdata); 955 if (WARN_ON(ret)) { 956 /* ok .. stupid driver, it asked for this! */ 957 kfree(sdata); 958 return ret; 959 } 960 961 set_bit(SDATA_STATE_RUNNING, &sdata->state); 962 963 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 964 if (ret) { 965 kfree(sdata); 966 return ret; 967 } 968 969 mutex_lock(&local->iflist_mtx); 970 rcu_assign_pointer(local->monitor_sdata, sdata); 971 mutex_unlock(&local->iflist_mtx); 972 973 mutex_lock(&local->mtx); 974 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 975 IEEE80211_CHANCTX_EXCLUSIVE); 976 mutex_unlock(&local->mtx); 977 if (ret) { 978 mutex_lock(&local->iflist_mtx); 979 RCU_INIT_POINTER(local->monitor_sdata, NULL); 980 mutex_unlock(&local->iflist_mtx); 981 synchronize_net(); 982 drv_remove_interface(local, sdata); 983 kfree(sdata); 984 return ret; 985 } 986 987 skb_queue_head_init(&sdata->skb_queue); 988 INIT_WORK(&sdata->work, ieee80211_iface_work); 989 990 return 0; 991 } 992 993 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 994 { 995 struct ieee80211_sub_if_data *sdata; 996 997 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 998 return; 999 1000 ASSERT_RTNL(); 1001 1002 mutex_lock(&local->iflist_mtx); 1003 1004 sdata = rcu_dereference_protected(local->monitor_sdata, 1005 lockdep_is_held(&local->iflist_mtx)); 1006 if (!sdata) { 1007 mutex_unlock(&local->iflist_mtx); 1008 return; 1009 } 1010 1011 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1012 mutex_unlock(&local->iflist_mtx); 1013 1014 synchronize_net(); 1015 1016 mutex_lock(&local->mtx); 1017 ieee80211_vif_release_channel(sdata); 1018 mutex_unlock(&local->mtx); 1019 1020 drv_remove_interface(local, sdata); 1021 1022 kfree(sdata); 1023 } 1024 1025 /* 1026 * NOTE: Be very careful when changing this function, it must NOT return 1027 * an error on interface type changes that have been pre-checked, so most 1028 * checks should be in ieee80211_check_concurrent_iface. 1029 */ 1030 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1031 { 1032 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1033 struct net_device *dev = wdev->netdev; 1034 struct ieee80211_local *local = sdata->local; 1035 u32 changed = 0; 1036 int res; 1037 u32 hw_reconf_flags = 0; 1038 1039 switch (sdata->vif.type) { 1040 case NL80211_IFTYPE_AP_VLAN: { 1041 struct ieee80211_sub_if_data *master; 1042 1043 if (!sdata->bss) 1044 return -ENOLINK; 1045 1046 mutex_lock(&local->mtx); 1047 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1048 mutex_unlock(&local->mtx); 1049 1050 master = container_of(sdata->bss, 1051 struct ieee80211_sub_if_data, u.ap); 1052 sdata->control_port_protocol = 1053 master->control_port_protocol; 1054 sdata->control_port_no_encrypt = 1055 master->control_port_no_encrypt; 1056 sdata->control_port_over_nl80211 = 1057 master->control_port_over_nl80211; 1058 sdata->control_port_no_preauth = 1059 master->control_port_no_preauth; 1060 sdata->vif.cab_queue = master->vif.cab_queue; 1061 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1062 sizeof(sdata->vif.hw_queue)); 1063 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 1064 1065 mutex_lock(&local->key_mtx); 1066 sdata->crypto_tx_tailroom_needed_cnt += 1067 master->crypto_tx_tailroom_needed_cnt; 1068 mutex_unlock(&local->key_mtx); 1069 1070 break; 1071 } 1072 case NL80211_IFTYPE_AP: 1073 sdata->bss = &sdata->u.ap; 1074 break; 1075 case NL80211_IFTYPE_MESH_POINT: 1076 case NL80211_IFTYPE_STATION: 1077 case NL80211_IFTYPE_MONITOR: 1078 case NL80211_IFTYPE_ADHOC: 1079 case NL80211_IFTYPE_P2P_DEVICE: 1080 case NL80211_IFTYPE_OCB: 1081 case NL80211_IFTYPE_NAN: 1082 /* no special treatment */ 1083 break; 1084 case NL80211_IFTYPE_UNSPECIFIED: 1085 case NUM_NL80211_IFTYPES: 1086 case NL80211_IFTYPE_P2P_CLIENT: 1087 case NL80211_IFTYPE_P2P_GO: 1088 case NL80211_IFTYPE_WDS: 1089 /* cannot happen */ 1090 WARN_ON(1); 1091 break; 1092 } 1093 1094 if (local->open_count == 0) { 1095 res = drv_start(local); 1096 if (res) 1097 goto err_del_bss; 1098 /* we're brought up, everything changes */ 1099 hw_reconf_flags = ~0; 1100 ieee80211_led_radio(local, true); 1101 ieee80211_mod_tpt_led_trig(local, 1102 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1103 } 1104 1105 /* 1106 * Copy the hopefully now-present MAC address to 1107 * this interface, if it has the special null one. 1108 */ 1109 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1110 memcpy(dev->dev_addr, 1111 local->hw.wiphy->perm_addr, 1112 ETH_ALEN); 1113 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1114 1115 if (!is_valid_ether_addr(dev->dev_addr)) { 1116 res = -EADDRNOTAVAIL; 1117 goto err_stop; 1118 } 1119 } 1120 1121 switch (sdata->vif.type) { 1122 case NL80211_IFTYPE_AP_VLAN: 1123 /* no need to tell driver, but set carrier and chanctx */ 1124 if (rtnl_dereference(sdata->bss->beacon)) { 1125 ieee80211_vif_vlan_copy_chanctx(sdata); 1126 netif_carrier_on(dev); 1127 ieee80211_set_vif_encap_ops(sdata); 1128 } else { 1129 netif_carrier_off(dev); 1130 } 1131 break; 1132 case NL80211_IFTYPE_MONITOR: 1133 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 1134 local->cooked_mntrs++; 1135 break; 1136 } 1137 1138 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 1139 res = drv_add_interface(local, sdata); 1140 if (res) 1141 goto err_stop; 1142 } else if (local->monitors == 0 && local->open_count == 0) { 1143 res = ieee80211_add_virtual_monitor(local); 1144 if (res) 1145 goto err_stop; 1146 } 1147 1148 /* must be before the call to ieee80211_configure_filter */ 1149 local->monitors++; 1150 if (local->monitors == 1) { 1151 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1152 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1153 } 1154 1155 ieee80211_adjust_monitor_flags(sdata, 1); 1156 ieee80211_configure_filter(local); 1157 ieee80211_recalc_offload(local); 1158 mutex_lock(&local->mtx); 1159 ieee80211_recalc_idle(local); 1160 mutex_unlock(&local->mtx); 1161 1162 netif_carrier_on(dev); 1163 break; 1164 default: 1165 if (coming_up) { 1166 ieee80211_del_virtual_monitor(local); 1167 ieee80211_set_sdata_offload_flags(sdata); 1168 1169 res = drv_add_interface(local, sdata); 1170 if (res) 1171 goto err_stop; 1172 1173 ieee80211_set_vif_encap_ops(sdata); 1174 res = ieee80211_check_queues(sdata, 1175 ieee80211_vif_type_p2p(&sdata->vif)); 1176 if (res) 1177 goto err_del_interface; 1178 } 1179 1180 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1181 local->fif_pspoll++; 1182 local->fif_probe_req++; 1183 1184 ieee80211_configure_filter(local); 1185 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1186 local->fif_probe_req++; 1187 } 1188 1189 if (sdata->vif.probe_req_reg) 1190 drv_config_iface_filter(local, sdata, 1191 FIF_PROBE_REQ, 1192 FIF_PROBE_REQ); 1193 1194 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1195 sdata->vif.type != NL80211_IFTYPE_NAN) 1196 changed |= ieee80211_reset_erp_info(sdata); 1197 ieee80211_bss_info_change_notify(sdata, changed); 1198 1199 switch (sdata->vif.type) { 1200 case NL80211_IFTYPE_STATION: 1201 case NL80211_IFTYPE_ADHOC: 1202 case NL80211_IFTYPE_AP: 1203 case NL80211_IFTYPE_MESH_POINT: 1204 case NL80211_IFTYPE_OCB: 1205 netif_carrier_off(dev); 1206 break; 1207 case NL80211_IFTYPE_P2P_DEVICE: 1208 case NL80211_IFTYPE_NAN: 1209 break; 1210 default: 1211 /* not reached */ 1212 WARN_ON(1); 1213 } 1214 1215 /* 1216 * Set default queue parameters so drivers don't 1217 * need to initialise the hardware if the hardware 1218 * doesn't start up with sane defaults. 1219 * Enable QoS for anything but station interfaces. 1220 */ 1221 ieee80211_set_wmm_default(sdata, true, 1222 sdata->vif.type != NL80211_IFTYPE_STATION); 1223 } 1224 1225 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1226 1227 switch (sdata->vif.type) { 1228 case NL80211_IFTYPE_P2P_DEVICE: 1229 rcu_assign_pointer(local->p2p_sdata, sdata); 1230 break; 1231 case NL80211_IFTYPE_MONITOR: 1232 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 1233 break; 1234 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1235 break; 1236 default: 1237 break; 1238 } 1239 1240 /* 1241 * set_multicast_list will be invoked by the networking core 1242 * which will check whether any increments here were done in 1243 * error and sync them down to the hardware as filter flags. 1244 */ 1245 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1246 atomic_inc(&local->iff_allmultis); 1247 1248 if (coming_up) 1249 local->open_count++; 1250 1251 if (hw_reconf_flags) 1252 ieee80211_hw_config(local, hw_reconf_flags); 1253 1254 ieee80211_recalc_ps(local); 1255 1256 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1257 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1258 local->ops->wake_tx_queue) { 1259 /* XXX: for AP_VLAN, actually track AP queues */ 1260 if (dev) 1261 netif_tx_start_all_queues(dev); 1262 } else if (dev) { 1263 unsigned long flags; 1264 int n_acs = IEEE80211_NUM_ACS; 1265 int ac; 1266 1267 if (local->hw.queues < IEEE80211_NUM_ACS) 1268 n_acs = 1; 1269 1270 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1271 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 1272 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 1273 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 1274 for (ac = 0; ac < n_acs; ac++) { 1275 int ac_queue = sdata->vif.hw_queue[ac]; 1276 1277 if (local->queue_stop_reasons[ac_queue] == 0 && 1278 skb_queue_empty(&local->pending[ac_queue])) 1279 netif_start_subqueue(dev, ac); 1280 } 1281 } 1282 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1283 } 1284 1285 return 0; 1286 err_del_interface: 1287 drv_remove_interface(local, sdata); 1288 err_stop: 1289 if (!local->open_count) 1290 drv_stop(local); 1291 err_del_bss: 1292 sdata->bss = NULL; 1293 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1294 mutex_lock(&local->mtx); 1295 list_del(&sdata->u.vlan.list); 1296 mutex_unlock(&local->mtx); 1297 } 1298 /* might already be clear but that doesn't matter */ 1299 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1300 return res; 1301 } 1302 1303 static void ieee80211_if_free(struct net_device *dev) 1304 { 1305 free_percpu(dev->tstats); 1306 } 1307 1308 static void ieee80211_if_setup(struct net_device *dev) 1309 { 1310 ether_setup(dev); 1311 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1312 dev->netdev_ops = &ieee80211_dataif_ops; 1313 dev->needs_free_netdev = true; 1314 dev->priv_destructor = ieee80211_if_free; 1315 } 1316 1317 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1318 { 1319 ieee80211_if_setup(dev); 1320 dev->priv_flags |= IFF_NO_QUEUE; 1321 } 1322 1323 static void ieee80211_iface_work(struct work_struct *work) 1324 { 1325 struct ieee80211_sub_if_data *sdata = 1326 container_of(work, struct ieee80211_sub_if_data, work); 1327 struct ieee80211_local *local = sdata->local; 1328 struct sk_buff *skb; 1329 struct sta_info *sta; 1330 1331 if (!ieee80211_sdata_running(sdata)) 1332 return; 1333 1334 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1335 return; 1336 1337 if (!ieee80211_can_run_worker(local)) 1338 return; 1339 1340 /* first process frames */ 1341 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1342 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1343 1344 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1345 if (ieee80211_is_action(mgmt->frame_control) && 1346 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1347 int len = skb->len; 1348 1349 mutex_lock(&local->sta_mtx); 1350 sta = sta_info_get_bss(sdata, mgmt->sa); 1351 if (sta) { 1352 switch (mgmt->u.action.u.addba_req.action_code) { 1353 case WLAN_ACTION_ADDBA_REQ: 1354 ieee80211_process_addba_request( 1355 local, sta, mgmt, len); 1356 break; 1357 case WLAN_ACTION_ADDBA_RESP: 1358 ieee80211_process_addba_resp(local, sta, 1359 mgmt, len); 1360 break; 1361 case WLAN_ACTION_DELBA: 1362 ieee80211_process_delba(sdata, sta, 1363 mgmt, len); 1364 break; 1365 default: 1366 WARN_ON(1); 1367 break; 1368 } 1369 } 1370 mutex_unlock(&local->sta_mtx); 1371 } else if (ieee80211_is_action(mgmt->frame_control) && 1372 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1373 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1374 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1375 struct ieee80211_rx_status *status; 1376 enum nl80211_band band; 1377 u8 opmode; 1378 1379 status = IEEE80211_SKB_RXCB(skb); 1380 band = status->band; 1381 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1382 1383 mutex_lock(&local->sta_mtx); 1384 sta = sta_info_get_bss(sdata, mgmt->sa); 1385 1386 if (sta) 1387 ieee80211_vht_handle_opmode(sdata, sta, 1388 opmode, 1389 band); 1390 1391 mutex_unlock(&local->sta_mtx); 1392 break; 1393 } 1394 case WLAN_VHT_ACTION_GROUPID_MGMT: 1395 ieee80211_process_mu_groups(sdata, mgmt); 1396 break; 1397 default: 1398 WARN_ON(1); 1399 break; 1400 } 1401 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1402 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1403 ieee80211_sta_rx_queued_ext(sdata, skb); 1404 else 1405 WARN_ON(1); 1406 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1407 struct ieee80211_hdr *hdr = (void *)mgmt; 1408 /* 1409 * So the frame isn't mgmt, but frame_control 1410 * is at the right place anyway, of course, so 1411 * the if statement is correct. 1412 * 1413 * Warn if we have other data frame types here, 1414 * they must not get here. 1415 */ 1416 WARN_ON(hdr->frame_control & 1417 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1418 WARN_ON(!(hdr->seq_ctrl & 1419 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1420 /* 1421 * This was a fragment of a frame, received while 1422 * a block-ack session was active. That cannot be 1423 * right, so terminate the session. 1424 */ 1425 mutex_lock(&local->sta_mtx); 1426 sta = sta_info_get_bss(sdata, mgmt->sa); 1427 if (sta) { 1428 u16 tid = ieee80211_get_tid(hdr); 1429 1430 __ieee80211_stop_rx_ba_session( 1431 sta, tid, WLAN_BACK_RECIPIENT, 1432 WLAN_REASON_QSTA_REQUIRE_SETUP, 1433 true); 1434 } 1435 mutex_unlock(&local->sta_mtx); 1436 } else switch (sdata->vif.type) { 1437 case NL80211_IFTYPE_STATION: 1438 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1439 break; 1440 case NL80211_IFTYPE_ADHOC: 1441 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1442 break; 1443 case NL80211_IFTYPE_MESH_POINT: 1444 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1445 break; 1446 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1447 break; 1448 default: 1449 WARN(1, "frame for unexpected interface type"); 1450 break; 1451 } 1452 1453 kfree_skb(skb); 1454 kcov_remote_stop(); 1455 } 1456 1457 /* then other type-dependent work */ 1458 switch (sdata->vif.type) { 1459 case NL80211_IFTYPE_STATION: 1460 ieee80211_sta_work(sdata); 1461 break; 1462 case NL80211_IFTYPE_ADHOC: 1463 ieee80211_ibss_work(sdata); 1464 break; 1465 case NL80211_IFTYPE_MESH_POINT: 1466 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1467 break; 1468 ieee80211_mesh_work(sdata); 1469 break; 1470 case NL80211_IFTYPE_OCB: 1471 ieee80211_ocb_work(sdata); 1472 break; 1473 default: 1474 break; 1475 } 1476 } 1477 1478 static void ieee80211_recalc_smps_work(struct work_struct *work) 1479 { 1480 struct ieee80211_sub_if_data *sdata = 1481 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1482 1483 ieee80211_recalc_smps(sdata); 1484 } 1485 1486 /* 1487 * Helper function to initialise an interface to a specific type. 1488 */ 1489 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1490 enum nl80211_iftype type) 1491 { 1492 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1493 0xff, 0xff, 0xff}; 1494 1495 /* clear type-dependent union */ 1496 memset(&sdata->u, 0, sizeof(sdata->u)); 1497 1498 /* and set some type-dependent values */ 1499 sdata->vif.type = type; 1500 sdata->vif.p2p = false; 1501 sdata->wdev.iftype = type; 1502 1503 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1504 sdata->control_port_no_encrypt = false; 1505 sdata->control_port_over_nl80211 = false; 1506 sdata->control_port_no_preauth = false; 1507 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1508 sdata->vif.bss_conf.idle = true; 1509 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1510 1511 sdata->noack_map = 0; 1512 1513 /* only monitor/p2p-device differ */ 1514 if (sdata->dev) { 1515 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1516 sdata->dev->type = ARPHRD_ETHER; 1517 } 1518 1519 skb_queue_head_init(&sdata->skb_queue); 1520 INIT_WORK(&sdata->work, ieee80211_iface_work); 1521 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1522 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1523 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1524 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1525 1526 switch (type) { 1527 case NL80211_IFTYPE_P2P_GO: 1528 type = NL80211_IFTYPE_AP; 1529 sdata->vif.type = type; 1530 sdata->vif.p2p = true; 1531 fallthrough; 1532 case NL80211_IFTYPE_AP: 1533 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1534 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1535 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1536 break; 1537 case NL80211_IFTYPE_P2P_CLIENT: 1538 type = NL80211_IFTYPE_STATION; 1539 sdata->vif.type = type; 1540 sdata->vif.p2p = true; 1541 fallthrough; 1542 case NL80211_IFTYPE_STATION: 1543 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1544 ieee80211_sta_setup_sdata(sdata); 1545 break; 1546 case NL80211_IFTYPE_OCB: 1547 sdata->vif.bss_conf.bssid = bssid_wildcard; 1548 ieee80211_ocb_setup_sdata(sdata); 1549 break; 1550 case NL80211_IFTYPE_ADHOC: 1551 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1552 ieee80211_ibss_setup_sdata(sdata); 1553 break; 1554 case NL80211_IFTYPE_MESH_POINT: 1555 if (ieee80211_vif_is_mesh(&sdata->vif)) 1556 ieee80211_mesh_init_sdata(sdata); 1557 break; 1558 case NL80211_IFTYPE_MONITOR: 1559 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1560 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1561 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1562 MONITOR_FLAG_OTHER_BSS; 1563 break; 1564 case NL80211_IFTYPE_NAN: 1565 idr_init(&sdata->u.nan.function_inst_ids); 1566 spin_lock_init(&sdata->u.nan.func_lock); 1567 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1568 break; 1569 case NL80211_IFTYPE_AP_VLAN: 1570 case NL80211_IFTYPE_P2P_DEVICE: 1571 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1572 break; 1573 case NL80211_IFTYPE_UNSPECIFIED: 1574 case NL80211_IFTYPE_WDS: 1575 case NUM_NL80211_IFTYPES: 1576 WARN_ON(1); 1577 break; 1578 } 1579 1580 ieee80211_debugfs_add_netdev(sdata); 1581 } 1582 1583 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1584 enum nl80211_iftype type) 1585 { 1586 struct ieee80211_local *local = sdata->local; 1587 int ret, err; 1588 enum nl80211_iftype internal_type = type; 1589 bool p2p = false; 1590 1591 ASSERT_RTNL(); 1592 1593 if (!local->ops->change_interface) 1594 return -EBUSY; 1595 1596 switch (sdata->vif.type) { 1597 case NL80211_IFTYPE_AP: 1598 case NL80211_IFTYPE_STATION: 1599 case NL80211_IFTYPE_ADHOC: 1600 case NL80211_IFTYPE_OCB: 1601 /* 1602 * Could maybe also all others here? 1603 * Just not sure how that interacts 1604 * with the RX/config path e.g. for 1605 * mesh. 1606 */ 1607 break; 1608 default: 1609 return -EBUSY; 1610 } 1611 1612 switch (type) { 1613 case NL80211_IFTYPE_AP: 1614 case NL80211_IFTYPE_STATION: 1615 case NL80211_IFTYPE_ADHOC: 1616 case NL80211_IFTYPE_OCB: 1617 /* 1618 * Could probably support everything 1619 * but here. 1620 */ 1621 break; 1622 case NL80211_IFTYPE_P2P_CLIENT: 1623 p2p = true; 1624 internal_type = NL80211_IFTYPE_STATION; 1625 break; 1626 case NL80211_IFTYPE_P2P_GO: 1627 p2p = true; 1628 internal_type = NL80211_IFTYPE_AP; 1629 break; 1630 default: 1631 return -EBUSY; 1632 } 1633 1634 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1635 if (ret) 1636 return ret; 1637 1638 ieee80211_stop_vif_queues(local, sdata, 1639 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1640 synchronize_net(); 1641 1642 ieee80211_do_stop(sdata, false); 1643 1644 ieee80211_teardown_sdata(sdata); 1645 1646 ieee80211_set_sdata_offload_flags(sdata); 1647 ret = drv_change_interface(local, sdata, internal_type, p2p); 1648 if (ret) 1649 type = ieee80211_vif_type_p2p(&sdata->vif); 1650 1651 /* 1652 * Ignore return value here, there's not much we can do since 1653 * the driver changed the interface type internally already. 1654 * The warnings will hopefully make driver authors fix it :-) 1655 */ 1656 ieee80211_check_queues(sdata, type); 1657 1658 ieee80211_setup_sdata(sdata, type); 1659 ieee80211_set_vif_encap_ops(sdata); 1660 1661 err = ieee80211_do_open(&sdata->wdev, false); 1662 WARN(err, "type change: do_open returned %d", err); 1663 1664 ieee80211_wake_vif_queues(local, sdata, 1665 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1666 return ret; 1667 } 1668 1669 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1670 enum nl80211_iftype type) 1671 { 1672 int ret; 1673 1674 ASSERT_RTNL(); 1675 1676 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1677 return 0; 1678 1679 if (ieee80211_sdata_running(sdata)) { 1680 ret = ieee80211_runtime_change_iftype(sdata, type); 1681 if (ret) 1682 return ret; 1683 } else { 1684 /* Purge and reset type-dependent state. */ 1685 ieee80211_teardown_sdata(sdata); 1686 ieee80211_setup_sdata(sdata, type); 1687 } 1688 1689 /* reset some values that shouldn't be kept across type changes */ 1690 if (type == NL80211_IFTYPE_STATION) 1691 sdata->u.mgd.use_4addr = false; 1692 1693 return 0; 1694 } 1695 1696 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1697 u8 *perm_addr, enum nl80211_iftype type) 1698 { 1699 struct ieee80211_sub_if_data *sdata; 1700 u64 mask, start, addr, val, inc; 1701 u8 *m; 1702 u8 tmp_addr[ETH_ALEN]; 1703 int i; 1704 1705 /* default ... something at least */ 1706 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1707 1708 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1709 local->hw.wiphy->n_addresses <= 1) 1710 return; 1711 1712 mutex_lock(&local->iflist_mtx); 1713 1714 switch (type) { 1715 case NL80211_IFTYPE_MONITOR: 1716 /* doesn't matter */ 1717 break; 1718 case NL80211_IFTYPE_AP_VLAN: 1719 /* match up with an AP interface */ 1720 list_for_each_entry(sdata, &local->interfaces, list) { 1721 if (sdata->vif.type != NL80211_IFTYPE_AP) 1722 continue; 1723 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1724 break; 1725 } 1726 /* keep default if no AP interface present */ 1727 break; 1728 case NL80211_IFTYPE_P2P_CLIENT: 1729 case NL80211_IFTYPE_P2P_GO: 1730 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1731 list_for_each_entry(sdata, &local->interfaces, list) { 1732 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1733 continue; 1734 if (!ieee80211_sdata_running(sdata)) 1735 continue; 1736 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1737 goto out_unlock; 1738 } 1739 } 1740 fallthrough; 1741 default: 1742 /* assign a new address if possible -- try n_addresses first */ 1743 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1744 bool used = false; 1745 1746 list_for_each_entry(sdata, &local->interfaces, list) { 1747 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1748 sdata->vif.addr)) { 1749 used = true; 1750 break; 1751 } 1752 } 1753 1754 if (!used) { 1755 memcpy(perm_addr, 1756 local->hw.wiphy->addresses[i].addr, 1757 ETH_ALEN); 1758 break; 1759 } 1760 } 1761 1762 /* try mask if available */ 1763 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1764 break; 1765 1766 m = local->hw.wiphy->addr_mask; 1767 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1768 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1769 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1770 1771 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1772 /* not a contiguous mask ... not handled now! */ 1773 pr_info("not contiguous\n"); 1774 break; 1775 } 1776 1777 /* 1778 * Pick address of existing interface in case user changed 1779 * MAC address manually, default to perm_addr. 1780 */ 1781 m = local->hw.wiphy->perm_addr; 1782 list_for_each_entry(sdata, &local->interfaces, list) { 1783 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1784 continue; 1785 m = sdata->vif.addr; 1786 break; 1787 } 1788 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1789 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1790 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1791 1792 inc = 1ULL<<__ffs64(mask); 1793 val = (start & mask); 1794 addr = (start & ~mask) | (val & mask); 1795 do { 1796 bool used = false; 1797 1798 tmp_addr[5] = addr >> 0*8; 1799 tmp_addr[4] = addr >> 1*8; 1800 tmp_addr[3] = addr >> 2*8; 1801 tmp_addr[2] = addr >> 3*8; 1802 tmp_addr[1] = addr >> 4*8; 1803 tmp_addr[0] = addr >> 5*8; 1804 1805 val += inc; 1806 1807 list_for_each_entry(sdata, &local->interfaces, list) { 1808 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1809 used = true; 1810 break; 1811 } 1812 } 1813 1814 if (!used) { 1815 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1816 break; 1817 } 1818 addr = (start & ~mask) | (val & mask); 1819 } while (addr != start); 1820 1821 break; 1822 } 1823 1824 out_unlock: 1825 mutex_unlock(&local->iflist_mtx); 1826 } 1827 1828 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1829 unsigned char name_assign_type, 1830 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1831 struct vif_params *params) 1832 { 1833 struct net_device *ndev = NULL; 1834 struct ieee80211_sub_if_data *sdata = NULL; 1835 struct txq_info *txqi; 1836 void (*if_setup)(struct net_device *dev); 1837 int ret, i; 1838 int txqs = 1; 1839 1840 ASSERT_RTNL(); 1841 1842 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1843 struct wireless_dev *wdev; 1844 1845 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1846 GFP_KERNEL); 1847 if (!sdata) 1848 return -ENOMEM; 1849 wdev = &sdata->wdev; 1850 1851 sdata->dev = NULL; 1852 strlcpy(sdata->name, name, IFNAMSIZ); 1853 ieee80211_assign_perm_addr(local, wdev->address, type); 1854 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1855 } else { 1856 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1857 sizeof(void *)); 1858 int txq_size = 0; 1859 1860 if (local->ops->wake_tx_queue && 1861 type != NL80211_IFTYPE_AP_VLAN && 1862 (type != NL80211_IFTYPE_MONITOR || 1863 (params->flags & MONITOR_FLAG_ACTIVE))) 1864 txq_size += sizeof(struct txq_info) + 1865 local->hw.txq_data_size; 1866 1867 if (local->ops->wake_tx_queue) { 1868 if_setup = ieee80211_if_setup_no_queue; 1869 } else { 1870 if_setup = ieee80211_if_setup; 1871 if (local->hw.queues >= IEEE80211_NUM_ACS) 1872 txqs = IEEE80211_NUM_ACS; 1873 } 1874 1875 ndev = alloc_netdev_mqs(size + txq_size, 1876 name, name_assign_type, 1877 if_setup, txqs, 1); 1878 if (!ndev) 1879 return -ENOMEM; 1880 1881 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 1882 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 1883 1884 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1885 1886 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1887 if (!ndev->tstats) { 1888 free_netdev(ndev); 1889 return -ENOMEM; 1890 } 1891 1892 ndev->needed_headroom = local->tx_headroom + 1893 4*6 /* four MAC addresses */ 1894 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1895 + 6 /* mesh */ 1896 + 8 /* rfc1042/bridge tunnel */ 1897 - ETH_HLEN /* ethernet hard_header_len */ 1898 + IEEE80211_ENCRYPT_HEADROOM; 1899 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1900 1901 ret = dev_alloc_name(ndev, ndev->name); 1902 if (ret < 0) { 1903 ieee80211_if_free(ndev); 1904 free_netdev(ndev); 1905 return ret; 1906 } 1907 1908 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1909 if (is_valid_ether_addr(params->macaddr)) 1910 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1911 else 1912 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1913 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1914 1915 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1916 sdata = netdev_priv(ndev); 1917 ndev->ieee80211_ptr = &sdata->wdev; 1918 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1919 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1920 1921 if (txq_size) { 1922 txqi = netdev_priv(ndev) + size; 1923 ieee80211_txq_init(sdata, NULL, txqi, 0); 1924 } 1925 1926 sdata->dev = ndev; 1927 } 1928 1929 /* initialise type-independent data */ 1930 sdata->wdev.wiphy = local->hw.wiphy; 1931 sdata->local = local; 1932 1933 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1934 skb_queue_head_init(&sdata->fragments[i].skb_list); 1935 1936 INIT_LIST_HEAD(&sdata->key_list); 1937 1938 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1939 ieee80211_dfs_cac_timer_work); 1940 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1941 ieee80211_delayed_tailroom_dec); 1942 1943 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1944 struct ieee80211_supported_band *sband; 1945 sband = local->hw.wiphy->bands[i]; 1946 sdata->rc_rateidx_mask[i] = 1947 sband ? (1 << sband->n_bitrates) - 1 : 0; 1948 if (sband) { 1949 __le16 cap; 1950 u16 *vht_rate_mask; 1951 1952 memcpy(sdata->rc_rateidx_mcs_mask[i], 1953 sband->ht_cap.mcs.rx_mask, 1954 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1955 1956 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1957 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1958 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1959 } else { 1960 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1961 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1962 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1963 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1964 } 1965 } 1966 1967 ieee80211_set_default_queues(sdata); 1968 1969 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1970 sdata->user_power_level = local->user_power_level; 1971 1972 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1973 1974 /* setup type-dependent data */ 1975 ieee80211_setup_sdata(sdata, type); 1976 1977 if (ndev) { 1978 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1979 if (type == NL80211_IFTYPE_STATION) 1980 sdata->u.mgd.use_4addr = params->use_4addr; 1981 1982 ndev->features |= local->hw.netdev_features; 1983 ndev->hw_features |= ndev->features & 1984 MAC80211_SUPPORTED_FEATURES_TX; 1985 1986 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1987 1988 /* MTU range: 256 - 2304 */ 1989 ndev->min_mtu = 256; 1990 ndev->max_mtu = local->hw.max_mtu; 1991 1992 ret = cfg80211_register_netdevice(ndev); 1993 if (ret) { 1994 free_netdev(ndev); 1995 return ret; 1996 } 1997 } 1998 1999 mutex_lock(&local->iflist_mtx); 2000 list_add_tail_rcu(&sdata->list, &local->interfaces); 2001 mutex_unlock(&local->iflist_mtx); 2002 2003 if (new_wdev) 2004 *new_wdev = &sdata->wdev; 2005 2006 return 0; 2007 } 2008 2009 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2010 { 2011 ASSERT_RTNL(); 2012 2013 mutex_lock(&sdata->local->iflist_mtx); 2014 list_del_rcu(&sdata->list); 2015 mutex_unlock(&sdata->local->iflist_mtx); 2016 2017 if (sdata->vif.txq) 2018 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2019 2020 synchronize_rcu(); 2021 2022 cfg80211_unregister_wdev(&sdata->wdev); 2023 2024 if (!sdata->dev) { 2025 ieee80211_teardown_sdata(sdata); 2026 kfree(sdata); 2027 } 2028 } 2029 2030 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2031 { 2032 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2033 return; 2034 ieee80211_do_stop(sdata, true); 2035 } 2036 2037 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2038 { 2039 struct ieee80211_sub_if_data *sdata, *tmp; 2040 LIST_HEAD(unreg_list); 2041 LIST_HEAD(wdev_list); 2042 2043 ASSERT_RTNL(); 2044 2045 /* Before destroying the interfaces, make sure they're all stopped so 2046 * that the hardware is stopped. Otherwise, the driver might still be 2047 * iterating the interfaces during the shutdown, e.g. from a worker 2048 * or from RX processing or similar, and if it does so (using atomic 2049 * iteration) while we're manipulating the list, the iteration will 2050 * crash. 2051 * 2052 * After this, the hardware should be stopped and the driver should 2053 * have stopped all of its activities, so that we can do RCU-unaware 2054 * manipulations of the interface list below. 2055 */ 2056 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2057 2058 WARN(local->open_count, "%s: open count remains %d\n", 2059 wiphy_name(local->hw.wiphy), local->open_count); 2060 2061 ieee80211_txq_teardown_flows(local); 2062 2063 mutex_lock(&local->iflist_mtx); 2064 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2065 list_del(&sdata->list); 2066 2067 if (sdata->dev) 2068 unregister_netdevice_queue(sdata->dev, &unreg_list); 2069 else 2070 list_add(&sdata->list, &wdev_list); 2071 } 2072 mutex_unlock(&local->iflist_mtx); 2073 2074 unregister_netdevice_many(&unreg_list); 2075 2076 wiphy_lock(local->hw.wiphy); 2077 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2078 list_del(&sdata->list); 2079 cfg80211_unregister_wdev(&sdata->wdev); 2080 kfree(sdata); 2081 } 2082 wiphy_unlock(local->hw.wiphy); 2083 } 2084 2085 static int netdev_notify(struct notifier_block *nb, 2086 unsigned long state, void *ptr) 2087 { 2088 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2089 struct ieee80211_sub_if_data *sdata; 2090 2091 if (state != NETDEV_CHANGENAME) 2092 return NOTIFY_DONE; 2093 2094 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2095 return NOTIFY_DONE; 2096 2097 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2098 return NOTIFY_DONE; 2099 2100 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2101 memcpy(sdata->name, dev->name, IFNAMSIZ); 2102 ieee80211_debugfs_rename_netdev(sdata); 2103 2104 return NOTIFY_OK; 2105 } 2106 2107 static struct notifier_block mac80211_netdev_notifier = { 2108 .notifier_call = netdev_notify, 2109 }; 2110 2111 int ieee80211_iface_init(void) 2112 { 2113 return register_netdevice_notifier(&mac80211_netdev_notifier); 2114 } 2115 2116 void ieee80211_iface_exit(void) 2117 { 2118 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2119 } 2120 2121 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2122 { 2123 if (sdata->vif.type == NL80211_IFTYPE_AP) 2124 atomic_inc(&sdata->u.ap.num_mcast_sta); 2125 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2126 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2127 } 2128 2129 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2130 { 2131 if (sdata->vif.type == NL80211_IFTYPE_AP) 2132 atomic_dec(&sdata->u.ap.num_mcast_sta); 2133 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2134 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2135 } 2136