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 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 if (sdata->vif.type == NL80211_IFTYPE_AP) { 480 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 481 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 482 /* remove all packets in parent bc_buf pointing to this dev */ 483 ps = &sdata->bss->ps; 484 485 spin_lock_irqsave(&ps->bc_buf.lock, flags); 486 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 487 if (skb->dev == sdata->dev) { 488 __skb_unlink(skb, &ps->bc_buf); 489 local->total_ps_buffered--; 490 ieee80211_free_txskb(&local->hw, skb); 491 } 492 } 493 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 494 } 495 496 if (going_down) 497 local->open_count--; 498 499 switch (sdata->vif.type) { 500 case NL80211_IFTYPE_AP_VLAN: 501 mutex_lock(&local->mtx); 502 list_del(&sdata->u.vlan.list); 503 mutex_unlock(&local->mtx); 504 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 505 /* see comment in the default case below */ 506 ieee80211_free_keys(sdata, true); 507 /* no need to tell driver */ 508 break; 509 case NL80211_IFTYPE_MONITOR: 510 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 511 local->cooked_mntrs--; 512 break; 513 } 514 515 local->monitors--; 516 if (local->monitors == 0) { 517 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 518 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 519 } 520 521 ieee80211_adjust_monitor_flags(sdata, -1); 522 break; 523 case NL80211_IFTYPE_NAN: 524 /* clean all the functions */ 525 spin_lock_bh(&sdata->u.nan.func_lock); 526 527 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 528 idr_remove(&sdata->u.nan.function_inst_ids, i); 529 cfg80211_free_nan_func(func); 530 } 531 idr_destroy(&sdata->u.nan.function_inst_ids); 532 533 spin_unlock_bh(&sdata->u.nan.func_lock); 534 break; 535 case NL80211_IFTYPE_P2P_DEVICE: 536 /* relies on synchronize_rcu() below */ 537 RCU_INIT_POINTER(local->p2p_sdata, NULL); 538 fallthrough; 539 default: 540 cancel_work_sync(&sdata->work); 541 /* 542 * When we get here, the interface is marked down. 543 * Free the remaining keys, if there are any 544 * (which can happen in AP mode if userspace sets 545 * keys before the interface is operating) 546 * 547 * Force the key freeing to always synchronize_net() 548 * to wait for the RX path in case it is using this 549 * interface enqueuing frames at this very time on 550 * another CPU. 551 */ 552 ieee80211_free_keys(sdata, true); 553 skb_queue_purge(&sdata->skb_queue); 554 } 555 556 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 557 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 558 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 559 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 560 if (info->control.vif == &sdata->vif) { 561 __skb_unlink(skb, &local->pending[i]); 562 ieee80211_free_txskb(&local->hw, skb); 563 } 564 } 565 } 566 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 567 568 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 569 ieee80211_txq_remove_vlan(local, sdata); 570 571 sdata->bss = NULL; 572 573 if (local->open_count == 0) 574 ieee80211_clear_tx_pending(local); 575 576 sdata->vif.bss_conf.beacon_int = 0; 577 578 /* 579 * If the interface goes down while suspended, presumably because 580 * the device was unplugged and that happens before our resume, 581 * then the driver is already unconfigured and the remainder of 582 * this function isn't needed. 583 * XXX: what about WoWLAN? If the device has software state, e.g. 584 * memory allocated, it might expect teardown commands from 585 * mac80211 here? 586 */ 587 if (local->suspended) { 588 WARN_ON(local->wowlan); 589 WARN_ON(rtnl_dereference(local->monitor_sdata)); 590 return; 591 } 592 593 switch (sdata->vif.type) { 594 case NL80211_IFTYPE_AP_VLAN: 595 break; 596 case NL80211_IFTYPE_MONITOR: 597 if (local->monitors == 0) 598 ieee80211_del_virtual_monitor(local); 599 600 mutex_lock(&local->mtx); 601 ieee80211_recalc_idle(local); 602 mutex_unlock(&local->mtx); 603 604 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 605 break; 606 607 fallthrough; 608 default: 609 if (going_down) 610 drv_remove_interface(local, sdata); 611 } 612 613 ieee80211_recalc_ps(local); 614 615 if (cancel_scan) 616 flush_delayed_work(&local->scan_work); 617 618 if (local->open_count == 0) { 619 ieee80211_stop_device(local); 620 621 /* no reconfiguring after stop! */ 622 return; 623 } 624 625 /* do after stop to avoid reconfiguring when we stop anyway */ 626 ieee80211_configure_filter(local); 627 ieee80211_hw_config(local, hw_reconf_flags); 628 629 if (local->monitors == local->open_count) 630 ieee80211_add_virtual_monitor(local); 631 } 632 633 static int ieee80211_stop(struct net_device *dev) 634 { 635 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 636 637 /* close all dependent VLAN interfaces before locking wiphy */ 638 if (sdata->vif.type == NL80211_IFTYPE_AP) { 639 struct ieee80211_sub_if_data *vlan, *tmpsdata; 640 641 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 642 u.vlan.list) 643 dev_close(vlan->dev); 644 } 645 646 wiphy_lock(sdata->local->hw.wiphy); 647 ieee80211_do_stop(sdata, true); 648 wiphy_unlock(sdata->local->hw.wiphy); 649 650 return 0; 651 } 652 653 static void ieee80211_set_multicast_list(struct net_device *dev) 654 { 655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 656 struct ieee80211_local *local = sdata->local; 657 int allmulti, sdata_allmulti; 658 659 allmulti = !!(dev->flags & IFF_ALLMULTI); 660 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 661 662 if (allmulti != sdata_allmulti) { 663 if (dev->flags & IFF_ALLMULTI) 664 atomic_inc(&local->iff_allmultis); 665 else 666 atomic_dec(&local->iff_allmultis); 667 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 668 } 669 670 spin_lock_bh(&local->filter_lock); 671 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 672 spin_unlock_bh(&local->filter_lock); 673 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 674 } 675 676 /* 677 * Called when the netdev is removed or, by the code below, before 678 * the interface type changes. 679 */ 680 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 681 { 682 /* free extra data */ 683 ieee80211_free_keys(sdata, false); 684 685 ieee80211_debugfs_remove_netdev(sdata); 686 687 ieee80211_destroy_frag_cache(&sdata->frags); 688 689 if (ieee80211_vif_is_mesh(&sdata->vif)) 690 ieee80211_mesh_teardown_sdata(sdata); 691 } 692 693 static void ieee80211_uninit(struct net_device *dev) 694 { 695 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 696 } 697 698 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 699 struct sk_buff *skb, 700 struct net_device *sb_dev) 701 { 702 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 703 } 704 705 static void 706 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 707 { 708 dev_fetch_sw_netstats(stats, dev->tstats); 709 } 710 711 static const struct net_device_ops ieee80211_dataif_ops = { 712 .ndo_open = ieee80211_open, 713 .ndo_stop = ieee80211_stop, 714 .ndo_uninit = ieee80211_uninit, 715 .ndo_start_xmit = ieee80211_subif_start_xmit, 716 .ndo_set_rx_mode = ieee80211_set_multicast_list, 717 .ndo_set_mac_address = ieee80211_change_mac, 718 .ndo_select_queue = ieee80211_netdev_select_queue, 719 .ndo_get_stats64 = ieee80211_get_stats64, 720 }; 721 722 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 723 struct sk_buff *skb, 724 struct net_device *sb_dev) 725 { 726 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 727 struct ieee80211_local *local = sdata->local; 728 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 729 struct ieee80211_hdr *hdr; 730 int len_rthdr; 731 732 if (local->hw.queues < IEEE80211_NUM_ACS) 733 return 0; 734 735 /* reset flags and info before parsing radiotap header */ 736 memset(info, 0, sizeof(*info)); 737 738 if (!ieee80211_parse_tx_radiotap(skb, dev)) 739 return 0; /* doesn't matter, frame will be dropped */ 740 741 len_rthdr = ieee80211_get_radiotap_len(skb->data); 742 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 743 if (skb->len < len_rthdr + 2 || 744 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 745 return 0; /* doesn't matter, frame will be dropped */ 746 747 return ieee80211_select_queue_80211(sdata, skb, hdr); 748 } 749 750 static const struct net_device_ops ieee80211_monitorif_ops = { 751 .ndo_open = ieee80211_open, 752 .ndo_stop = ieee80211_stop, 753 .ndo_uninit = ieee80211_uninit, 754 .ndo_start_xmit = ieee80211_monitor_start_xmit, 755 .ndo_set_rx_mode = ieee80211_set_multicast_list, 756 .ndo_set_mac_address = ieee80211_change_mac, 757 .ndo_select_queue = ieee80211_monitor_select_queue, 758 .ndo_get_stats64 = ieee80211_get_stats64, 759 }; 760 761 static const struct net_device_ops ieee80211_dataif_8023_ops = { 762 .ndo_open = ieee80211_open, 763 .ndo_stop = ieee80211_stop, 764 .ndo_uninit = ieee80211_uninit, 765 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 766 .ndo_set_rx_mode = ieee80211_set_multicast_list, 767 .ndo_set_mac_address = ieee80211_change_mac, 768 .ndo_select_queue = ieee80211_netdev_select_queue, 769 .ndo_get_stats64 = ieee80211_get_stats64, 770 }; 771 772 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 773 { 774 switch (iftype) { 775 /* P2P GO and client are mapped to AP/STATION types */ 776 case NL80211_IFTYPE_AP: 777 case NL80211_IFTYPE_STATION: 778 return true; 779 default: 780 return false; 781 } 782 } 783 784 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 785 { 786 struct ieee80211_local *local = sdata->local; 787 u32 flags; 788 789 flags = sdata->vif.offload_flags; 790 791 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 792 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 793 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 794 795 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 796 local->hw.wiphy->frag_threshold != (u32)-1) 797 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 798 799 if (local->monitors) 800 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 801 } else { 802 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 803 } 804 805 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 806 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 807 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 808 809 if (local->monitors && 810 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP)) 811 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 812 } else { 813 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 814 } 815 816 if (sdata->vif.offload_flags == flags) 817 return false; 818 819 sdata->vif.offload_flags = flags; 820 ieee80211_check_fast_rx_iface(sdata); 821 return true; 822 } 823 824 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 825 { 826 struct ieee80211_local *local = sdata->local; 827 struct ieee80211_sub_if_data *bss = sdata; 828 bool enabled; 829 830 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 831 if (!sdata->bss) 832 return; 833 834 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 835 } 836 837 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 838 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 839 return; 840 841 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 842 if (sdata->wdev.use_4addr && 843 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 844 enabled = false; 845 846 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 847 &ieee80211_dataif_ops; 848 } 849 850 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 851 { 852 struct ieee80211_local *local = sdata->local; 853 struct ieee80211_sub_if_data *vsdata; 854 855 if (ieee80211_set_sdata_offload_flags(sdata)) { 856 drv_update_vif_offload(local, sdata); 857 ieee80211_set_vif_encap_ops(sdata); 858 } 859 860 list_for_each_entry(vsdata, &local->interfaces, list) { 861 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 862 vsdata->bss != &sdata->u.ap) 863 continue; 864 865 ieee80211_set_vif_encap_ops(vsdata); 866 } 867 } 868 869 void ieee80211_recalc_offload(struct ieee80211_local *local) 870 { 871 struct ieee80211_sub_if_data *sdata; 872 873 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 874 return; 875 876 mutex_lock(&local->iflist_mtx); 877 878 list_for_each_entry(sdata, &local->interfaces, list) { 879 if (!ieee80211_sdata_running(sdata)) 880 continue; 881 882 ieee80211_recalc_sdata_offload(sdata); 883 } 884 885 mutex_unlock(&local->iflist_mtx); 886 } 887 888 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 889 const int offset) 890 { 891 struct ieee80211_local *local = sdata->local; 892 u32 flags = sdata->u.mntr.flags; 893 894 #define ADJUST(_f, _s) do { \ 895 if (flags & MONITOR_FLAG_##_f) \ 896 local->fif_##_s += offset; \ 897 } while (0) 898 899 ADJUST(FCSFAIL, fcsfail); 900 ADJUST(PLCPFAIL, plcpfail); 901 ADJUST(CONTROL, control); 902 ADJUST(CONTROL, pspoll); 903 ADJUST(OTHER_BSS, other_bss); 904 905 #undef ADJUST 906 } 907 908 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 909 { 910 struct ieee80211_local *local = sdata->local; 911 int i; 912 913 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 914 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 915 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 916 else if (local->hw.queues >= IEEE80211_NUM_ACS) 917 sdata->vif.hw_queue[i] = i; 918 else 919 sdata->vif.hw_queue[i] = 0; 920 } 921 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 922 } 923 924 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 925 { 926 struct ieee80211_sub_if_data *sdata; 927 int ret; 928 929 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 930 return 0; 931 932 ASSERT_RTNL(); 933 934 if (local->monitor_sdata) 935 return 0; 936 937 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 938 if (!sdata) 939 return -ENOMEM; 940 941 /* set up data */ 942 sdata->local = local; 943 sdata->vif.type = NL80211_IFTYPE_MONITOR; 944 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 945 wiphy_name(local->hw.wiphy)); 946 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 947 948 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 949 950 ieee80211_set_default_queues(sdata); 951 952 ret = drv_add_interface(local, sdata); 953 if (WARN_ON(ret)) { 954 /* ok .. stupid driver, it asked for this! */ 955 kfree(sdata); 956 return ret; 957 } 958 959 set_bit(SDATA_STATE_RUNNING, &sdata->state); 960 961 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 962 if (ret) { 963 kfree(sdata); 964 return ret; 965 } 966 967 mutex_lock(&local->iflist_mtx); 968 rcu_assign_pointer(local->monitor_sdata, sdata); 969 mutex_unlock(&local->iflist_mtx); 970 971 mutex_lock(&local->mtx); 972 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 973 IEEE80211_CHANCTX_EXCLUSIVE); 974 mutex_unlock(&local->mtx); 975 if (ret) { 976 mutex_lock(&local->iflist_mtx); 977 RCU_INIT_POINTER(local->monitor_sdata, NULL); 978 mutex_unlock(&local->iflist_mtx); 979 synchronize_net(); 980 drv_remove_interface(local, sdata); 981 kfree(sdata); 982 return ret; 983 } 984 985 skb_queue_head_init(&sdata->skb_queue); 986 INIT_WORK(&sdata->work, ieee80211_iface_work); 987 988 return 0; 989 } 990 991 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 992 { 993 struct ieee80211_sub_if_data *sdata; 994 995 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 996 return; 997 998 ASSERT_RTNL(); 999 1000 mutex_lock(&local->iflist_mtx); 1001 1002 sdata = rcu_dereference_protected(local->monitor_sdata, 1003 lockdep_is_held(&local->iflist_mtx)); 1004 if (!sdata) { 1005 mutex_unlock(&local->iflist_mtx); 1006 return; 1007 } 1008 1009 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1010 mutex_unlock(&local->iflist_mtx); 1011 1012 synchronize_net(); 1013 1014 mutex_lock(&local->mtx); 1015 ieee80211_vif_release_channel(sdata); 1016 mutex_unlock(&local->mtx); 1017 1018 drv_remove_interface(local, sdata); 1019 1020 kfree(sdata); 1021 } 1022 1023 /* 1024 * NOTE: Be very careful when changing this function, it must NOT return 1025 * an error on interface type changes that have been pre-checked, so most 1026 * checks should be in ieee80211_check_concurrent_iface. 1027 */ 1028 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1029 { 1030 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1031 struct net_device *dev = wdev->netdev; 1032 struct ieee80211_local *local = sdata->local; 1033 u32 changed = 0; 1034 int res; 1035 u32 hw_reconf_flags = 0; 1036 1037 switch (sdata->vif.type) { 1038 case NL80211_IFTYPE_AP_VLAN: { 1039 struct ieee80211_sub_if_data *master; 1040 1041 if (!sdata->bss) 1042 return -ENOLINK; 1043 1044 mutex_lock(&local->mtx); 1045 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1046 mutex_unlock(&local->mtx); 1047 1048 master = container_of(sdata->bss, 1049 struct ieee80211_sub_if_data, u.ap); 1050 sdata->control_port_protocol = 1051 master->control_port_protocol; 1052 sdata->control_port_no_encrypt = 1053 master->control_port_no_encrypt; 1054 sdata->control_port_over_nl80211 = 1055 master->control_port_over_nl80211; 1056 sdata->control_port_no_preauth = 1057 master->control_port_no_preauth; 1058 sdata->vif.cab_queue = master->vif.cab_queue; 1059 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1060 sizeof(sdata->vif.hw_queue)); 1061 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 1062 1063 mutex_lock(&local->key_mtx); 1064 sdata->crypto_tx_tailroom_needed_cnt += 1065 master->crypto_tx_tailroom_needed_cnt; 1066 mutex_unlock(&local->key_mtx); 1067 1068 break; 1069 } 1070 case NL80211_IFTYPE_AP: 1071 sdata->bss = &sdata->u.ap; 1072 break; 1073 case NL80211_IFTYPE_MESH_POINT: 1074 case NL80211_IFTYPE_STATION: 1075 case NL80211_IFTYPE_MONITOR: 1076 case NL80211_IFTYPE_ADHOC: 1077 case NL80211_IFTYPE_P2P_DEVICE: 1078 case NL80211_IFTYPE_OCB: 1079 case NL80211_IFTYPE_NAN: 1080 /* no special treatment */ 1081 break; 1082 case NL80211_IFTYPE_UNSPECIFIED: 1083 case NUM_NL80211_IFTYPES: 1084 case NL80211_IFTYPE_P2P_CLIENT: 1085 case NL80211_IFTYPE_P2P_GO: 1086 case NL80211_IFTYPE_WDS: 1087 /* cannot happen */ 1088 WARN_ON(1); 1089 break; 1090 } 1091 1092 if (local->open_count == 0) { 1093 res = drv_start(local); 1094 if (res) 1095 goto err_del_bss; 1096 /* we're brought up, everything changes */ 1097 hw_reconf_flags = ~0; 1098 ieee80211_led_radio(local, true); 1099 ieee80211_mod_tpt_led_trig(local, 1100 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1101 } 1102 1103 /* 1104 * Copy the hopefully now-present MAC address to 1105 * this interface, if it has the special null one. 1106 */ 1107 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1108 memcpy(dev->dev_addr, 1109 local->hw.wiphy->perm_addr, 1110 ETH_ALEN); 1111 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1112 1113 if (!is_valid_ether_addr(dev->dev_addr)) { 1114 res = -EADDRNOTAVAIL; 1115 goto err_stop; 1116 } 1117 } 1118 1119 switch (sdata->vif.type) { 1120 case NL80211_IFTYPE_AP_VLAN: 1121 /* no need to tell driver, but set carrier and chanctx */ 1122 if (rtnl_dereference(sdata->bss->beacon)) { 1123 ieee80211_vif_vlan_copy_chanctx(sdata); 1124 netif_carrier_on(dev); 1125 ieee80211_set_vif_encap_ops(sdata); 1126 } else { 1127 netif_carrier_off(dev); 1128 } 1129 break; 1130 case NL80211_IFTYPE_MONITOR: 1131 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 1132 local->cooked_mntrs++; 1133 break; 1134 } 1135 1136 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 1137 res = drv_add_interface(local, sdata); 1138 if (res) 1139 goto err_stop; 1140 } else if (local->monitors == 0 && local->open_count == 0) { 1141 res = ieee80211_add_virtual_monitor(local); 1142 if (res) 1143 goto err_stop; 1144 } 1145 1146 /* must be before the call to ieee80211_configure_filter */ 1147 local->monitors++; 1148 if (local->monitors == 1) { 1149 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1150 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1151 } 1152 1153 ieee80211_adjust_monitor_flags(sdata, 1); 1154 ieee80211_configure_filter(local); 1155 ieee80211_recalc_offload(local); 1156 mutex_lock(&local->mtx); 1157 ieee80211_recalc_idle(local); 1158 mutex_unlock(&local->mtx); 1159 1160 netif_carrier_on(dev); 1161 break; 1162 default: 1163 if (coming_up) { 1164 ieee80211_del_virtual_monitor(local); 1165 ieee80211_set_sdata_offload_flags(sdata); 1166 1167 res = drv_add_interface(local, sdata); 1168 if (res) 1169 goto err_stop; 1170 1171 ieee80211_set_vif_encap_ops(sdata); 1172 res = ieee80211_check_queues(sdata, 1173 ieee80211_vif_type_p2p(&sdata->vif)); 1174 if (res) 1175 goto err_del_interface; 1176 } 1177 1178 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1179 local->fif_pspoll++; 1180 local->fif_probe_req++; 1181 1182 ieee80211_configure_filter(local); 1183 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1184 local->fif_probe_req++; 1185 } 1186 1187 if (sdata->vif.probe_req_reg) 1188 drv_config_iface_filter(local, sdata, 1189 FIF_PROBE_REQ, 1190 FIF_PROBE_REQ); 1191 1192 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1193 sdata->vif.type != NL80211_IFTYPE_NAN) 1194 changed |= ieee80211_reset_erp_info(sdata); 1195 ieee80211_bss_info_change_notify(sdata, changed); 1196 1197 switch (sdata->vif.type) { 1198 case NL80211_IFTYPE_STATION: 1199 case NL80211_IFTYPE_ADHOC: 1200 case NL80211_IFTYPE_AP: 1201 case NL80211_IFTYPE_MESH_POINT: 1202 case NL80211_IFTYPE_OCB: 1203 netif_carrier_off(dev); 1204 break; 1205 case NL80211_IFTYPE_P2P_DEVICE: 1206 case NL80211_IFTYPE_NAN: 1207 break; 1208 default: 1209 /* not reached */ 1210 WARN_ON(1); 1211 } 1212 1213 /* 1214 * Set default queue parameters so drivers don't 1215 * need to initialise the hardware if the hardware 1216 * doesn't start up with sane defaults. 1217 * Enable QoS for anything but station interfaces. 1218 */ 1219 ieee80211_set_wmm_default(sdata, true, 1220 sdata->vif.type != NL80211_IFTYPE_STATION); 1221 } 1222 1223 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1224 1225 switch (sdata->vif.type) { 1226 case NL80211_IFTYPE_P2P_DEVICE: 1227 rcu_assign_pointer(local->p2p_sdata, sdata); 1228 break; 1229 case NL80211_IFTYPE_MONITOR: 1230 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 1231 break; 1232 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1233 break; 1234 default: 1235 break; 1236 } 1237 1238 /* 1239 * set_multicast_list will be invoked by the networking core 1240 * which will check whether any increments here were done in 1241 * error and sync them down to the hardware as filter flags. 1242 */ 1243 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1244 atomic_inc(&local->iff_allmultis); 1245 1246 if (coming_up) 1247 local->open_count++; 1248 1249 if (hw_reconf_flags) 1250 ieee80211_hw_config(local, hw_reconf_flags); 1251 1252 ieee80211_recalc_ps(local); 1253 1254 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1255 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1256 local->ops->wake_tx_queue) { 1257 /* XXX: for AP_VLAN, actually track AP queues */ 1258 if (dev) 1259 netif_tx_start_all_queues(dev); 1260 } else if (dev) { 1261 unsigned long flags; 1262 int n_acs = IEEE80211_NUM_ACS; 1263 int ac; 1264 1265 if (local->hw.queues < IEEE80211_NUM_ACS) 1266 n_acs = 1; 1267 1268 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1269 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 1270 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 1271 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 1272 for (ac = 0; ac < n_acs; ac++) { 1273 int ac_queue = sdata->vif.hw_queue[ac]; 1274 1275 if (local->queue_stop_reasons[ac_queue] == 0 && 1276 skb_queue_empty(&local->pending[ac_queue])) 1277 netif_start_subqueue(dev, ac); 1278 } 1279 } 1280 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1281 } 1282 1283 return 0; 1284 err_del_interface: 1285 drv_remove_interface(local, sdata); 1286 err_stop: 1287 if (!local->open_count) 1288 drv_stop(local); 1289 err_del_bss: 1290 sdata->bss = NULL; 1291 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1292 mutex_lock(&local->mtx); 1293 list_del(&sdata->u.vlan.list); 1294 mutex_unlock(&local->mtx); 1295 } 1296 /* might already be clear but that doesn't matter */ 1297 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1298 return res; 1299 } 1300 1301 static void ieee80211_if_free(struct net_device *dev) 1302 { 1303 free_percpu(dev->tstats); 1304 } 1305 1306 static void ieee80211_if_setup(struct net_device *dev) 1307 { 1308 ether_setup(dev); 1309 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1310 dev->netdev_ops = &ieee80211_dataif_ops; 1311 dev->needs_free_netdev = true; 1312 dev->priv_destructor = ieee80211_if_free; 1313 } 1314 1315 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1316 { 1317 ieee80211_if_setup(dev); 1318 dev->priv_flags |= IFF_NO_QUEUE; 1319 } 1320 1321 static void ieee80211_iface_work(struct work_struct *work) 1322 { 1323 struct ieee80211_sub_if_data *sdata = 1324 container_of(work, struct ieee80211_sub_if_data, work); 1325 struct ieee80211_local *local = sdata->local; 1326 struct sk_buff *skb; 1327 struct sta_info *sta; 1328 1329 if (!ieee80211_sdata_running(sdata)) 1330 return; 1331 1332 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1333 return; 1334 1335 if (!ieee80211_can_run_worker(local)) 1336 return; 1337 1338 /* first process frames */ 1339 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1340 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1341 1342 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1343 if (ieee80211_is_action(mgmt->frame_control) && 1344 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1345 int len = skb->len; 1346 1347 mutex_lock(&local->sta_mtx); 1348 sta = sta_info_get_bss(sdata, mgmt->sa); 1349 if (sta) { 1350 switch (mgmt->u.action.u.addba_req.action_code) { 1351 case WLAN_ACTION_ADDBA_REQ: 1352 ieee80211_process_addba_request( 1353 local, sta, mgmt, len); 1354 break; 1355 case WLAN_ACTION_ADDBA_RESP: 1356 ieee80211_process_addba_resp(local, sta, 1357 mgmt, len); 1358 break; 1359 case WLAN_ACTION_DELBA: 1360 ieee80211_process_delba(sdata, sta, 1361 mgmt, len); 1362 break; 1363 default: 1364 WARN_ON(1); 1365 break; 1366 } 1367 } 1368 mutex_unlock(&local->sta_mtx); 1369 } else if (ieee80211_is_action(mgmt->frame_control) && 1370 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1371 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1372 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1373 struct ieee80211_rx_status *status; 1374 enum nl80211_band band; 1375 u8 opmode; 1376 1377 status = IEEE80211_SKB_RXCB(skb); 1378 band = status->band; 1379 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1380 1381 mutex_lock(&local->sta_mtx); 1382 sta = sta_info_get_bss(sdata, mgmt->sa); 1383 1384 if (sta) 1385 ieee80211_vht_handle_opmode(sdata, sta, 1386 opmode, 1387 band); 1388 1389 mutex_unlock(&local->sta_mtx); 1390 break; 1391 } 1392 case WLAN_VHT_ACTION_GROUPID_MGMT: 1393 ieee80211_process_mu_groups(sdata, mgmt); 1394 break; 1395 default: 1396 WARN_ON(1); 1397 break; 1398 } 1399 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1400 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1401 ieee80211_sta_rx_queued_ext(sdata, skb); 1402 else 1403 WARN_ON(1); 1404 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1405 struct ieee80211_hdr *hdr = (void *)mgmt; 1406 /* 1407 * So the frame isn't mgmt, but frame_control 1408 * is at the right place anyway, of course, so 1409 * the if statement is correct. 1410 * 1411 * Warn if we have other data frame types here, 1412 * they must not get here. 1413 */ 1414 WARN_ON(hdr->frame_control & 1415 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1416 WARN_ON(!(hdr->seq_ctrl & 1417 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1418 /* 1419 * This was a fragment of a frame, received while 1420 * a block-ack session was active. That cannot be 1421 * right, so terminate the session. 1422 */ 1423 mutex_lock(&local->sta_mtx); 1424 sta = sta_info_get_bss(sdata, mgmt->sa); 1425 if (sta) { 1426 u16 tid = ieee80211_get_tid(hdr); 1427 1428 __ieee80211_stop_rx_ba_session( 1429 sta, tid, WLAN_BACK_RECIPIENT, 1430 WLAN_REASON_QSTA_REQUIRE_SETUP, 1431 true); 1432 } 1433 mutex_unlock(&local->sta_mtx); 1434 } else switch (sdata->vif.type) { 1435 case NL80211_IFTYPE_STATION: 1436 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1437 break; 1438 case NL80211_IFTYPE_ADHOC: 1439 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1440 break; 1441 case NL80211_IFTYPE_MESH_POINT: 1442 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1443 break; 1444 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1445 break; 1446 default: 1447 WARN(1, "frame for unexpected interface type"); 1448 break; 1449 } 1450 1451 kfree_skb(skb); 1452 kcov_remote_stop(); 1453 } 1454 1455 /* then other type-dependent work */ 1456 switch (sdata->vif.type) { 1457 case NL80211_IFTYPE_STATION: 1458 ieee80211_sta_work(sdata); 1459 break; 1460 case NL80211_IFTYPE_ADHOC: 1461 ieee80211_ibss_work(sdata); 1462 break; 1463 case NL80211_IFTYPE_MESH_POINT: 1464 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1465 break; 1466 ieee80211_mesh_work(sdata); 1467 break; 1468 case NL80211_IFTYPE_OCB: 1469 ieee80211_ocb_work(sdata); 1470 break; 1471 default: 1472 break; 1473 } 1474 } 1475 1476 static void ieee80211_recalc_smps_work(struct work_struct *work) 1477 { 1478 struct ieee80211_sub_if_data *sdata = 1479 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1480 1481 ieee80211_recalc_smps(sdata); 1482 } 1483 1484 /* 1485 * Helper function to initialise an interface to a specific type. 1486 */ 1487 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1488 enum nl80211_iftype type) 1489 { 1490 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1491 0xff, 0xff, 0xff}; 1492 1493 /* clear type-dependent union */ 1494 memset(&sdata->u, 0, sizeof(sdata->u)); 1495 1496 /* and set some type-dependent values */ 1497 sdata->vif.type = type; 1498 sdata->vif.p2p = false; 1499 sdata->wdev.iftype = type; 1500 1501 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1502 sdata->control_port_no_encrypt = false; 1503 sdata->control_port_over_nl80211 = false; 1504 sdata->control_port_no_preauth = false; 1505 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1506 sdata->vif.bss_conf.idle = true; 1507 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1508 1509 sdata->noack_map = 0; 1510 1511 /* only monitor/p2p-device differ */ 1512 if (sdata->dev) { 1513 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1514 sdata->dev->type = ARPHRD_ETHER; 1515 } 1516 1517 skb_queue_head_init(&sdata->skb_queue); 1518 INIT_WORK(&sdata->work, ieee80211_iface_work); 1519 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1520 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1521 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1522 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1523 1524 switch (type) { 1525 case NL80211_IFTYPE_P2P_GO: 1526 type = NL80211_IFTYPE_AP; 1527 sdata->vif.type = type; 1528 sdata->vif.p2p = true; 1529 fallthrough; 1530 case NL80211_IFTYPE_AP: 1531 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1532 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1533 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1534 break; 1535 case NL80211_IFTYPE_P2P_CLIENT: 1536 type = NL80211_IFTYPE_STATION; 1537 sdata->vif.type = type; 1538 sdata->vif.p2p = true; 1539 fallthrough; 1540 case NL80211_IFTYPE_STATION: 1541 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1542 ieee80211_sta_setup_sdata(sdata); 1543 break; 1544 case NL80211_IFTYPE_OCB: 1545 sdata->vif.bss_conf.bssid = bssid_wildcard; 1546 ieee80211_ocb_setup_sdata(sdata); 1547 break; 1548 case NL80211_IFTYPE_ADHOC: 1549 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1550 ieee80211_ibss_setup_sdata(sdata); 1551 break; 1552 case NL80211_IFTYPE_MESH_POINT: 1553 if (ieee80211_vif_is_mesh(&sdata->vif)) 1554 ieee80211_mesh_init_sdata(sdata); 1555 break; 1556 case NL80211_IFTYPE_MONITOR: 1557 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1558 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1559 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1560 MONITOR_FLAG_OTHER_BSS; 1561 break; 1562 case NL80211_IFTYPE_NAN: 1563 idr_init(&sdata->u.nan.function_inst_ids); 1564 spin_lock_init(&sdata->u.nan.func_lock); 1565 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1566 break; 1567 case NL80211_IFTYPE_AP_VLAN: 1568 case NL80211_IFTYPE_P2P_DEVICE: 1569 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1570 break; 1571 case NL80211_IFTYPE_UNSPECIFIED: 1572 case NL80211_IFTYPE_WDS: 1573 case NUM_NL80211_IFTYPES: 1574 WARN_ON(1); 1575 break; 1576 } 1577 1578 ieee80211_debugfs_add_netdev(sdata); 1579 } 1580 1581 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1582 enum nl80211_iftype type) 1583 { 1584 struct ieee80211_local *local = sdata->local; 1585 int ret, err; 1586 enum nl80211_iftype internal_type = type; 1587 bool p2p = false; 1588 1589 ASSERT_RTNL(); 1590 1591 if (!local->ops->change_interface) 1592 return -EBUSY; 1593 1594 switch (sdata->vif.type) { 1595 case NL80211_IFTYPE_AP: 1596 if (!list_empty(&sdata->u.ap.vlans)) 1597 return -EBUSY; 1598 break; 1599 case NL80211_IFTYPE_STATION: 1600 case NL80211_IFTYPE_ADHOC: 1601 case NL80211_IFTYPE_OCB: 1602 /* 1603 * Could maybe also all others here? 1604 * Just not sure how that interacts 1605 * with the RX/config path e.g. for 1606 * mesh. 1607 */ 1608 break; 1609 default: 1610 return -EBUSY; 1611 } 1612 1613 switch (type) { 1614 case NL80211_IFTYPE_AP: 1615 case NL80211_IFTYPE_STATION: 1616 case NL80211_IFTYPE_ADHOC: 1617 case NL80211_IFTYPE_OCB: 1618 /* 1619 * Could probably support everything 1620 * but here. 1621 */ 1622 break; 1623 case NL80211_IFTYPE_P2P_CLIENT: 1624 p2p = true; 1625 internal_type = NL80211_IFTYPE_STATION; 1626 break; 1627 case NL80211_IFTYPE_P2P_GO: 1628 p2p = true; 1629 internal_type = NL80211_IFTYPE_AP; 1630 break; 1631 default: 1632 return -EBUSY; 1633 } 1634 1635 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1636 if (ret) 1637 return ret; 1638 1639 ieee80211_stop_vif_queues(local, sdata, 1640 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1641 synchronize_net(); 1642 1643 ieee80211_do_stop(sdata, false); 1644 1645 ieee80211_teardown_sdata(sdata); 1646 1647 ieee80211_set_sdata_offload_flags(sdata); 1648 ret = drv_change_interface(local, sdata, internal_type, p2p); 1649 if (ret) 1650 type = ieee80211_vif_type_p2p(&sdata->vif); 1651 1652 /* 1653 * Ignore return value here, there's not much we can do since 1654 * the driver changed the interface type internally already. 1655 * The warnings will hopefully make driver authors fix it :-) 1656 */ 1657 ieee80211_check_queues(sdata, type); 1658 1659 ieee80211_setup_sdata(sdata, type); 1660 ieee80211_set_vif_encap_ops(sdata); 1661 1662 err = ieee80211_do_open(&sdata->wdev, false); 1663 WARN(err, "type change: do_open returned %d", err); 1664 1665 ieee80211_wake_vif_queues(local, sdata, 1666 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1667 return ret; 1668 } 1669 1670 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1671 enum nl80211_iftype type) 1672 { 1673 int ret; 1674 1675 ASSERT_RTNL(); 1676 1677 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1678 return 0; 1679 1680 if (ieee80211_sdata_running(sdata)) { 1681 ret = ieee80211_runtime_change_iftype(sdata, type); 1682 if (ret) 1683 return ret; 1684 } else { 1685 /* Purge and reset type-dependent state. */ 1686 ieee80211_teardown_sdata(sdata); 1687 ieee80211_setup_sdata(sdata, type); 1688 } 1689 1690 /* reset some values that shouldn't be kept across type changes */ 1691 if (type == NL80211_IFTYPE_STATION) 1692 sdata->u.mgd.use_4addr = false; 1693 1694 return 0; 1695 } 1696 1697 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1698 u8 *perm_addr, enum nl80211_iftype type) 1699 { 1700 struct ieee80211_sub_if_data *sdata; 1701 u64 mask, start, addr, val, inc; 1702 u8 *m; 1703 u8 tmp_addr[ETH_ALEN]; 1704 int i; 1705 1706 /* default ... something at least */ 1707 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1708 1709 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1710 local->hw.wiphy->n_addresses <= 1) 1711 return; 1712 1713 mutex_lock(&local->iflist_mtx); 1714 1715 switch (type) { 1716 case NL80211_IFTYPE_MONITOR: 1717 /* doesn't matter */ 1718 break; 1719 case NL80211_IFTYPE_AP_VLAN: 1720 /* match up with an AP interface */ 1721 list_for_each_entry(sdata, &local->interfaces, list) { 1722 if (sdata->vif.type != NL80211_IFTYPE_AP) 1723 continue; 1724 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1725 break; 1726 } 1727 /* keep default if no AP interface present */ 1728 break; 1729 case NL80211_IFTYPE_P2P_CLIENT: 1730 case NL80211_IFTYPE_P2P_GO: 1731 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1732 list_for_each_entry(sdata, &local->interfaces, list) { 1733 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1734 continue; 1735 if (!ieee80211_sdata_running(sdata)) 1736 continue; 1737 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1738 goto out_unlock; 1739 } 1740 } 1741 fallthrough; 1742 default: 1743 /* assign a new address if possible -- try n_addresses first */ 1744 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1745 bool used = false; 1746 1747 list_for_each_entry(sdata, &local->interfaces, list) { 1748 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1749 sdata->vif.addr)) { 1750 used = true; 1751 break; 1752 } 1753 } 1754 1755 if (!used) { 1756 memcpy(perm_addr, 1757 local->hw.wiphy->addresses[i].addr, 1758 ETH_ALEN); 1759 break; 1760 } 1761 } 1762 1763 /* try mask if available */ 1764 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1765 break; 1766 1767 m = local->hw.wiphy->addr_mask; 1768 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1769 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1770 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1771 1772 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1773 /* not a contiguous mask ... not handled now! */ 1774 pr_info("not contiguous\n"); 1775 break; 1776 } 1777 1778 /* 1779 * Pick address of existing interface in case user changed 1780 * MAC address manually, default to perm_addr. 1781 */ 1782 m = local->hw.wiphy->perm_addr; 1783 list_for_each_entry(sdata, &local->interfaces, list) { 1784 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1785 continue; 1786 m = sdata->vif.addr; 1787 break; 1788 } 1789 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1790 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1791 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1792 1793 inc = 1ULL<<__ffs64(mask); 1794 val = (start & mask); 1795 addr = (start & ~mask) | (val & mask); 1796 do { 1797 bool used = false; 1798 1799 tmp_addr[5] = addr >> 0*8; 1800 tmp_addr[4] = addr >> 1*8; 1801 tmp_addr[3] = addr >> 2*8; 1802 tmp_addr[2] = addr >> 3*8; 1803 tmp_addr[1] = addr >> 4*8; 1804 tmp_addr[0] = addr >> 5*8; 1805 1806 val += inc; 1807 1808 list_for_each_entry(sdata, &local->interfaces, list) { 1809 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1810 used = true; 1811 break; 1812 } 1813 } 1814 1815 if (!used) { 1816 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1817 break; 1818 } 1819 addr = (start & ~mask) | (val & mask); 1820 } while (addr != start); 1821 1822 break; 1823 } 1824 1825 out_unlock: 1826 mutex_unlock(&local->iflist_mtx); 1827 } 1828 1829 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1830 unsigned char name_assign_type, 1831 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1832 struct vif_params *params) 1833 { 1834 struct net_device *ndev = NULL; 1835 struct ieee80211_sub_if_data *sdata = NULL; 1836 struct txq_info *txqi; 1837 void (*if_setup)(struct net_device *dev); 1838 int ret, i; 1839 int txqs = 1; 1840 1841 ASSERT_RTNL(); 1842 1843 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1844 struct wireless_dev *wdev; 1845 1846 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1847 GFP_KERNEL); 1848 if (!sdata) 1849 return -ENOMEM; 1850 wdev = &sdata->wdev; 1851 1852 sdata->dev = NULL; 1853 strlcpy(sdata->name, name, IFNAMSIZ); 1854 ieee80211_assign_perm_addr(local, wdev->address, type); 1855 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1856 } else { 1857 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1858 sizeof(void *)); 1859 int txq_size = 0; 1860 1861 if (local->ops->wake_tx_queue && 1862 type != NL80211_IFTYPE_AP_VLAN && 1863 (type != NL80211_IFTYPE_MONITOR || 1864 (params->flags & MONITOR_FLAG_ACTIVE))) 1865 txq_size += sizeof(struct txq_info) + 1866 local->hw.txq_data_size; 1867 1868 if (local->ops->wake_tx_queue) { 1869 if_setup = ieee80211_if_setup_no_queue; 1870 } else { 1871 if_setup = ieee80211_if_setup; 1872 if (local->hw.queues >= IEEE80211_NUM_ACS) 1873 txqs = IEEE80211_NUM_ACS; 1874 } 1875 1876 ndev = alloc_netdev_mqs(size + txq_size, 1877 name, name_assign_type, 1878 if_setup, txqs, 1); 1879 if (!ndev) 1880 return -ENOMEM; 1881 1882 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 1883 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 1884 1885 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1886 1887 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1888 if (!ndev->tstats) { 1889 free_netdev(ndev); 1890 return -ENOMEM; 1891 } 1892 1893 ndev->needed_headroom = local->tx_headroom + 1894 4*6 /* four MAC addresses */ 1895 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1896 + 6 /* mesh */ 1897 + 8 /* rfc1042/bridge tunnel */ 1898 - ETH_HLEN /* ethernet hard_header_len */ 1899 + IEEE80211_ENCRYPT_HEADROOM; 1900 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1901 1902 ret = dev_alloc_name(ndev, ndev->name); 1903 if (ret < 0) { 1904 ieee80211_if_free(ndev); 1905 free_netdev(ndev); 1906 return ret; 1907 } 1908 1909 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1910 if (is_valid_ether_addr(params->macaddr)) 1911 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1912 else 1913 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1914 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1915 1916 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1917 sdata = netdev_priv(ndev); 1918 ndev->ieee80211_ptr = &sdata->wdev; 1919 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1920 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1921 1922 if (txq_size) { 1923 txqi = netdev_priv(ndev) + size; 1924 ieee80211_txq_init(sdata, NULL, txqi, 0); 1925 } 1926 1927 sdata->dev = ndev; 1928 } 1929 1930 /* initialise type-independent data */ 1931 sdata->wdev.wiphy = local->hw.wiphy; 1932 sdata->local = local; 1933 1934 ieee80211_init_frag_cache(&sdata->frags); 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