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 <net/mac80211.h> 19 #include <net/ieee80211_radiotap.h> 20 #include "ieee80211_i.h" 21 #include "sta_info.h" 22 #include "debugfs_netdev.h" 23 #include "mesh.h" 24 #include "led.h" 25 #include "driver-ops.h" 26 #include "wme.h" 27 #include "rate.h" 28 29 /** 30 * DOC: Interface list locking 31 * 32 * The interface list in each struct ieee80211_local is protected 33 * three-fold: 34 * 35 * (1) modifications may only be done under the RTNL 36 * (2) modifications and readers are protected against each other by 37 * the iflist_mtx. 38 * (3) modifications are done in an RCU manner so atomic readers 39 * can traverse the list in RCU-safe blocks. 40 * 41 * As a consequence, reads (traversals) of the list can be protected 42 * by either the RTNL, the iflist_mtx or RCU. 43 */ 44 45 static void ieee80211_iface_work(struct work_struct *work); 46 47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 48 { 49 struct ieee80211_chanctx_conf *chanctx_conf; 50 int power; 51 52 rcu_read_lock(); 53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 54 if (!chanctx_conf) { 55 rcu_read_unlock(); 56 return false; 57 } 58 59 power = ieee80211_chandef_max_power(&chanctx_conf->def); 60 rcu_read_unlock(); 61 62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 63 power = min(power, sdata->user_power_level); 64 65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 66 power = min(power, sdata->ap_power_level); 67 68 if (power != sdata->vif.bss_conf.txpower) { 69 sdata->vif.bss_conf.txpower = power; 70 ieee80211_hw_config(sdata->local, 0); 71 return true; 72 } 73 74 return false; 75 } 76 77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 78 bool update_bss) 79 { 80 if (__ieee80211_recalc_txpower(sdata) || 81 (update_bss && ieee80211_sdata_running(sdata))) 82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 83 } 84 85 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 86 { 87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 88 return 0; 89 90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 91 return IEEE80211_CONF_CHANGE_IDLE; 92 } 93 94 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 95 { 96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 97 return 0; 98 99 ieee80211_flush_queues(local, NULL, false); 100 101 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 102 return IEEE80211_CONF_CHANGE_IDLE; 103 } 104 105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 106 bool force_active) 107 { 108 bool working, scanning, active; 109 unsigned int led_trig_start = 0, led_trig_stop = 0; 110 111 lockdep_assert_held(&local->mtx); 112 113 active = force_active || 114 !list_empty(&local->chanctx_list) || 115 local->monitors; 116 117 working = !local->ops->remain_on_channel && 118 !list_empty(&local->roc_list); 119 120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 122 123 if (working || scanning) 124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 125 else 126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 127 128 if (active) 129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 130 else 131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 132 133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 134 135 if (working || scanning || active) 136 return __ieee80211_idle_off(local); 137 return __ieee80211_idle_on(local); 138 } 139 140 u32 ieee80211_idle_off(struct ieee80211_local *local) 141 { 142 return __ieee80211_recalc_idle(local, true); 143 } 144 145 void ieee80211_recalc_idle(struct ieee80211_local *local) 146 { 147 u32 change = __ieee80211_recalc_idle(local, false); 148 if (change) 149 ieee80211_hw_config(local, change); 150 } 151 152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 153 bool check_dup) 154 { 155 struct ieee80211_local *local = sdata->local; 156 struct ieee80211_sub_if_data *iter; 157 u64 new, mask, tmp; 158 u8 *m; 159 int ret = 0; 160 161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 162 return 0; 163 164 m = addr; 165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 168 169 m = local->hw.wiphy->addr_mask; 170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 173 174 if (!check_dup) 175 return ret; 176 177 mutex_lock(&local->iflist_mtx); 178 list_for_each_entry(iter, &local->interfaces, list) { 179 if (iter == sdata) 180 continue; 181 182 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 184 continue; 185 186 m = iter->vif.addr; 187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 190 191 if ((new & ~mask) != (tmp & ~mask)) { 192 ret = -EINVAL; 193 break; 194 } 195 } 196 mutex_unlock(&local->iflist_mtx); 197 198 return ret; 199 } 200 201 static int ieee80211_change_mac(struct net_device *dev, void *addr) 202 { 203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 204 struct sockaddr *sa = addr; 205 bool check_dup = true; 206 int ret; 207 208 if (ieee80211_sdata_running(sdata)) 209 return -EBUSY; 210 211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 213 check_dup = false; 214 215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 216 if (ret) 217 return ret; 218 219 ret = eth_mac_addr(dev, sa); 220 221 if (ret == 0) 222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 223 224 return ret; 225 } 226 227 static inline int identical_mac_addr_allowed(int type1, int type2) 228 { 229 return type1 == NL80211_IFTYPE_MONITOR || 230 type2 == NL80211_IFTYPE_MONITOR || 231 type1 == NL80211_IFTYPE_P2P_DEVICE || 232 type2 == NL80211_IFTYPE_P2P_DEVICE || 233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 234 (type1 == NL80211_IFTYPE_AP_VLAN && 235 (type2 == NL80211_IFTYPE_AP || 236 type2 == NL80211_IFTYPE_AP_VLAN)); 237 } 238 239 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 240 enum nl80211_iftype iftype) 241 { 242 struct ieee80211_local *local = sdata->local; 243 struct ieee80211_sub_if_data *nsdata; 244 int ret; 245 246 ASSERT_RTNL(); 247 248 /* we hold the RTNL here so can safely walk the list */ 249 list_for_each_entry(nsdata, &local->interfaces, list) { 250 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 251 /* 252 * Only OCB and monitor mode may coexist 253 */ 254 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 255 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 256 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 257 nsdata->vif.type == NL80211_IFTYPE_OCB)) 258 return -EBUSY; 259 260 /* 261 * Allow only a single IBSS interface to be up at any 262 * time. This is restricted because beacon distribution 263 * cannot work properly if both are in the same IBSS. 264 * 265 * To remove this restriction we'd have to disallow them 266 * from setting the same SSID on different IBSS interfaces 267 * belonging to the same hardware. Then, however, we're 268 * faced with having to adopt two different TSF timers... 269 */ 270 if (iftype == NL80211_IFTYPE_ADHOC && 271 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 272 return -EBUSY; 273 /* 274 * will not add another interface while any channel 275 * switch is active. 276 */ 277 if (nsdata->vif.csa_active) 278 return -EBUSY; 279 280 /* 281 * The remaining checks are only performed for interfaces 282 * with the same MAC address. 283 */ 284 if (!ether_addr_equal(sdata->vif.addr, 285 nsdata->vif.addr)) 286 continue; 287 288 /* 289 * check whether it may have the same address 290 */ 291 if (!identical_mac_addr_allowed(iftype, 292 nsdata->vif.type)) 293 return -ENOTUNIQ; 294 295 /* 296 * can only add VLANs to enabled APs 297 */ 298 if (iftype == NL80211_IFTYPE_AP_VLAN && 299 nsdata->vif.type == NL80211_IFTYPE_AP) 300 sdata->bss = &nsdata->u.ap; 301 } 302 } 303 304 mutex_lock(&local->chanctx_mtx); 305 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 306 mutex_unlock(&local->chanctx_mtx); 307 return ret; 308 } 309 310 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 311 enum nl80211_iftype iftype) 312 { 313 int n_queues = sdata->local->hw.queues; 314 int i; 315 316 if (iftype == NL80211_IFTYPE_NAN) 317 return 0; 318 319 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 320 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 321 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 322 IEEE80211_INVAL_HW_QUEUE)) 323 return -EINVAL; 324 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 325 n_queues)) 326 return -EINVAL; 327 } 328 } 329 330 if ((iftype != NL80211_IFTYPE_AP && 331 iftype != NL80211_IFTYPE_P2P_GO && 332 iftype != NL80211_IFTYPE_MESH_POINT) || 333 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 334 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 335 return 0; 336 } 337 338 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 339 return -EINVAL; 340 341 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 342 return -EINVAL; 343 344 return 0; 345 } 346 347 static int ieee80211_open(struct net_device *dev) 348 { 349 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 350 int err; 351 352 /* fail early if user set an invalid address */ 353 if (!is_valid_ether_addr(dev->dev_addr)) 354 return -EADDRNOTAVAIL; 355 356 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 357 if (err) 358 return err; 359 360 return ieee80211_do_open(&sdata->wdev, true); 361 } 362 363 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 364 bool going_down) 365 { 366 struct ieee80211_local *local = sdata->local; 367 unsigned long flags; 368 struct sk_buff *skb, *tmp; 369 u32 hw_reconf_flags = 0; 370 int i, flushed; 371 struct ps_data *ps; 372 struct cfg80211_chan_def chandef; 373 bool cancel_scan; 374 struct cfg80211_nan_func *func; 375 376 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 377 378 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 379 if (cancel_scan) 380 ieee80211_scan_cancel(local); 381 382 /* 383 * Stop TX on this interface first. 384 */ 385 if (sdata->dev) 386 netif_tx_stop_all_queues(sdata->dev); 387 388 ieee80211_roc_purge(local, sdata); 389 390 switch (sdata->vif.type) { 391 case NL80211_IFTYPE_STATION: 392 ieee80211_mgd_stop(sdata); 393 break; 394 case NL80211_IFTYPE_ADHOC: 395 ieee80211_ibss_stop(sdata); 396 break; 397 case NL80211_IFTYPE_MONITOR: 398 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 399 break; 400 list_del_rcu(&sdata->u.mntr.list); 401 break; 402 default: 403 break; 404 } 405 406 /* 407 * Remove all stations associated with this interface. 408 * 409 * This must be done before calling ops->remove_interface() 410 * because otherwise we can later invoke ops->sta_notify() 411 * whenever the STAs are removed, and that invalidates driver 412 * assumptions about always getting a vif pointer that is valid 413 * (because if we remove a STA after ops->remove_interface() 414 * the driver will have removed the vif info already!) 415 * 416 * For AP_VLANs stations may exist since there's nothing else that 417 * would have removed them, but in other modes there shouldn't 418 * be any stations. 419 */ 420 flushed = sta_info_flush(sdata); 421 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0); 422 423 /* don't count this interface for allmulti while it is down */ 424 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 425 atomic_dec(&local->iff_allmultis); 426 427 if (sdata->vif.type == NL80211_IFTYPE_AP) { 428 local->fif_pspoll--; 429 local->fif_probe_req--; 430 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 431 local->fif_probe_req--; 432 } 433 434 if (sdata->dev) { 435 netif_addr_lock_bh(sdata->dev); 436 spin_lock_bh(&local->filter_lock); 437 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 438 sdata->dev->addr_len); 439 spin_unlock_bh(&local->filter_lock); 440 netif_addr_unlock_bh(sdata->dev); 441 } 442 443 del_timer_sync(&local->dynamic_ps_timer); 444 cancel_work_sync(&local->dynamic_ps_enable_work); 445 446 cancel_work_sync(&sdata->recalc_smps); 447 sdata_lock(sdata); 448 mutex_lock(&local->mtx); 449 sdata->vif.csa_active = false; 450 if (sdata->vif.type == NL80211_IFTYPE_STATION) 451 sdata->u.mgd.csa_waiting_bcn = false; 452 if (sdata->csa_block_tx) { 453 ieee80211_wake_vif_queues(local, sdata, 454 IEEE80211_QUEUE_STOP_REASON_CSA); 455 sdata->csa_block_tx = false; 456 } 457 mutex_unlock(&local->mtx); 458 sdata_unlock(sdata); 459 460 cancel_work_sync(&sdata->csa_finalize_work); 461 462 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 463 464 if (sdata->wdev.cac_started) { 465 chandef = sdata->vif.bss_conf.chandef; 466 WARN_ON(local->suspended); 467 mutex_lock(&local->mtx); 468 ieee80211_vif_release_channel(sdata); 469 mutex_unlock(&local->mtx); 470 cfg80211_cac_event(sdata->dev, &chandef, 471 NL80211_RADAR_CAC_ABORTED, 472 GFP_KERNEL); 473 } 474 475 /* APs need special treatment */ 476 if (sdata->vif.type == NL80211_IFTYPE_AP) { 477 struct ieee80211_sub_if_data *vlan, *tmpsdata; 478 479 /* down all dependent devices, that is VLANs */ 480 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 481 u.vlan.list) 482 dev_close(vlan->dev); 483 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 484 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 485 /* remove all packets in parent bc_buf pointing to this dev */ 486 ps = &sdata->bss->ps; 487 488 spin_lock_irqsave(&ps->bc_buf.lock, flags); 489 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 490 if (skb->dev == sdata->dev) { 491 __skb_unlink(skb, &ps->bc_buf); 492 local->total_ps_buffered--; 493 ieee80211_free_txskb(&local->hw, skb); 494 } 495 } 496 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 497 } 498 499 if (going_down) 500 local->open_count--; 501 502 switch (sdata->vif.type) { 503 case NL80211_IFTYPE_AP_VLAN: 504 mutex_lock(&local->mtx); 505 list_del(&sdata->u.vlan.list); 506 mutex_unlock(&local->mtx); 507 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 508 /* see comment in the default case below */ 509 ieee80211_free_keys(sdata, true); 510 /* no need to tell driver */ 511 break; 512 case NL80211_IFTYPE_MONITOR: 513 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 514 local->cooked_mntrs--; 515 break; 516 } 517 518 local->monitors--; 519 if (local->monitors == 0) { 520 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 521 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 522 } 523 524 ieee80211_adjust_monitor_flags(sdata, -1); 525 break; 526 case NL80211_IFTYPE_NAN: 527 /* clean all the functions */ 528 spin_lock_bh(&sdata->u.nan.func_lock); 529 530 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 531 idr_remove(&sdata->u.nan.function_inst_ids, i); 532 cfg80211_free_nan_func(func); 533 } 534 idr_destroy(&sdata->u.nan.function_inst_ids); 535 536 spin_unlock_bh(&sdata->u.nan.func_lock); 537 break; 538 case NL80211_IFTYPE_P2P_DEVICE: 539 /* relies on synchronize_rcu() below */ 540 RCU_INIT_POINTER(local->p2p_sdata, NULL); 541 fallthrough; 542 default: 543 cancel_work_sync(&sdata->work); 544 /* 545 * When we get here, the interface is marked down. 546 * Free the remaining keys, if there are any 547 * (which can happen in AP mode if userspace sets 548 * keys before the interface is operating) 549 * 550 * Force the key freeing to always synchronize_net() 551 * to wait for the RX path in case it is using this 552 * interface enqueuing frames at this very time on 553 * another CPU. 554 */ 555 ieee80211_free_keys(sdata, true); 556 skb_queue_purge(&sdata->skb_queue); 557 } 558 559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 560 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 561 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 562 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 563 if (info->control.vif == &sdata->vif) { 564 __skb_unlink(skb, &local->pending[i]); 565 ieee80211_free_txskb(&local->hw, skb); 566 } 567 } 568 } 569 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 570 571 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 572 ieee80211_txq_remove_vlan(local, sdata); 573 574 sdata->bss = NULL; 575 576 if (local->open_count == 0) 577 ieee80211_clear_tx_pending(local); 578 579 sdata->vif.bss_conf.beacon_int = 0; 580 581 /* 582 * If the interface goes down while suspended, presumably because 583 * the device was unplugged and that happens before our resume, 584 * then the driver is already unconfigured and the remainder of 585 * this function isn't needed. 586 * XXX: what about WoWLAN? If the device has software state, e.g. 587 * memory allocated, it might expect teardown commands from 588 * mac80211 here? 589 */ 590 if (local->suspended) { 591 WARN_ON(local->wowlan); 592 WARN_ON(rtnl_dereference(local->monitor_sdata)); 593 return; 594 } 595 596 switch (sdata->vif.type) { 597 case NL80211_IFTYPE_AP_VLAN: 598 break; 599 case NL80211_IFTYPE_MONITOR: 600 if (local->monitors == 0) 601 ieee80211_del_virtual_monitor(local); 602 603 mutex_lock(&local->mtx); 604 ieee80211_recalc_idle(local); 605 mutex_unlock(&local->mtx); 606 607 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 608 break; 609 610 fallthrough; 611 default: 612 if (going_down) 613 drv_remove_interface(local, sdata); 614 } 615 616 ieee80211_recalc_ps(local); 617 618 if (cancel_scan) 619 flush_delayed_work(&local->scan_work); 620 621 if (local->open_count == 0) { 622 ieee80211_stop_device(local); 623 624 /* no reconfiguring after stop! */ 625 return; 626 } 627 628 /* do after stop to avoid reconfiguring when we stop anyway */ 629 ieee80211_configure_filter(local); 630 ieee80211_hw_config(local, hw_reconf_flags); 631 632 if (local->monitors == local->open_count) 633 ieee80211_add_virtual_monitor(local); 634 } 635 636 static int ieee80211_stop(struct net_device *dev) 637 { 638 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 639 640 ieee80211_do_stop(sdata, true); 641 642 return 0; 643 } 644 645 static void ieee80211_set_multicast_list(struct net_device *dev) 646 { 647 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 648 struct ieee80211_local *local = sdata->local; 649 int allmulti, sdata_allmulti; 650 651 allmulti = !!(dev->flags & IFF_ALLMULTI); 652 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 653 654 if (allmulti != sdata_allmulti) { 655 if (dev->flags & IFF_ALLMULTI) 656 atomic_inc(&local->iff_allmultis); 657 else 658 atomic_dec(&local->iff_allmultis); 659 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 660 } 661 662 spin_lock_bh(&local->filter_lock); 663 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 664 spin_unlock_bh(&local->filter_lock); 665 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 666 } 667 668 /* 669 * Called when the netdev is removed or, by the code below, before 670 * the interface type changes. 671 */ 672 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 673 { 674 int i; 675 676 /* free extra data */ 677 ieee80211_free_keys(sdata, false); 678 679 ieee80211_debugfs_remove_netdev(sdata); 680 681 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 682 __skb_queue_purge(&sdata->fragments[i].skb_list); 683 sdata->fragment_next = 0; 684 685 if (ieee80211_vif_is_mesh(&sdata->vif)) 686 ieee80211_mesh_teardown_sdata(sdata); 687 } 688 689 static void ieee80211_uninit(struct net_device *dev) 690 { 691 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 692 } 693 694 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 695 struct sk_buff *skb, 696 struct net_device *sb_dev) 697 { 698 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 699 } 700 701 static void 702 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 703 { 704 dev_fetch_sw_netstats(stats, dev->tstats); 705 } 706 707 static const struct net_device_ops ieee80211_dataif_ops = { 708 .ndo_open = ieee80211_open, 709 .ndo_stop = ieee80211_stop, 710 .ndo_uninit = ieee80211_uninit, 711 .ndo_start_xmit = ieee80211_subif_start_xmit, 712 .ndo_set_rx_mode = ieee80211_set_multicast_list, 713 .ndo_set_mac_address = ieee80211_change_mac, 714 .ndo_select_queue = ieee80211_netdev_select_queue, 715 .ndo_get_stats64 = ieee80211_get_stats64, 716 }; 717 718 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 719 struct sk_buff *skb, 720 struct net_device *sb_dev) 721 { 722 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 723 struct ieee80211_local *local = sdata->local; 724 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 725 struct ieee80211_hdr *hdr; 726 int len_rthdr; 727 728 if (local->hw.queues < IEEE80211_NUM_ACS) 729 return 0; 730 731 /* reset flags and info before parsing radiotap header */ 732 memset(info, 0, sizeof(*info)); 733 734 if (!ieee80211_parse_tx_radiotap(skb, dev)) 735 return 0; /* doesn't matter, frame will be dropped */ 736 737 len_rthdr = ieee80211_get_radiotap_len(skb->data); 738 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 739 if (skb->len < len_rthdr + 2 || 740 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 741 return 0; /* doesn't matter, frame will be dropped */ 742 743 return ieee80211_select_queue_80211(sdata, skb, hdr); 744 } 745 746 static const struct net_device_ops ieee80211_monitorif_ops = { 747 .ndo_open = ieee80211_open, 748 .ndo_stop = ieee80211_stop, 749 .ndo_uninit = ieee80211_uninit, 750 .ndo_start_xmit = ieee80211_monitor_start_xmit, 751 .ndo_set_rx_mode = ieee80211_set_multicast_list, 752 .ndo_set_mac_address = ieee80211_change_mac, 753 .ndo_select_queue = ieee80211_monitor_select_queue, 754 .ndo_get_stats64 = ieee80211_get_stats64, 755 }; 756 757 static const struct net_device_ops ieee80211_dataif_8023_ops = { 758 .ndo_open = ieee80211_open, 759 .ndo_stop = ieee80211_stop, 760 .ndo_uninit = ieee80211_uninit, 761 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 762 .ndo_set_rx_mode = ieee80211_set_multicast_list, 763 .ndo_set_mac_address = ieee80211_change_mac, 764 .ndo_select_queue = ieee80211_netdev_select_queue, 765 .ndo_get_stats64 = ieee80211_get_stats64, 766 }; 767 768 static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype) 769 { 770 switch (iftype) { 771 /* P2P GO and client are mapped to AP/STATION types */ 772 case NL80211_IFTYPE_AP: 773 case NL80211_IFTYPE_STATION: 774 return true; 775 default: 776 return false; 777 } 778 } 779 780 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 781 { 782 struct ieee80211_local *local = sdata->local; 783 u32 flags; 784 785 flags = sdata->vif.offload_flags; 786 787 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 788 ieee80211_iftype_supports_encap_offload(sdata->vif.type)) { 789 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 790 791 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 792 local->hw.wiphy->frag_threshold != (u32)-1) 793 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 794 795 if (local->monitors) 796 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 797 } else { 798 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 799 } 800 801 if (sdata->vif.offload_flags == flags) 802 return false; 803 804 sdata->vif.offload_flags = flags; 805 return true; 806 } 807 808 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 809 { 810 struct ieee80211_local *local = sdata->local; 811 struct ieee80211_sub_if_data *bss = sdata; 812 bool enabled; 813 814 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 815 if (!sdata->bss) 816 return; 817 818 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 819 } 820 821 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 822 !ieee80211_iftype_supports_encap_offload(bss->vif.type)) 823 return; 824 825 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 826 if (sdata->wdev.use_4addr && 827 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 828 enabled = false; 829 830 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 831 &ieee80211_dataif_ops; 832 } 833 834 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 835 { 836 struct ieee80211_local *local = sdata->local; 837 struct ieee80211_sub_if_data *vsdata; 838 839 if (ieee80211_set_sdata_offload_flags(sdata)) { 840 drv_update_vif_offload(local, sdata); 841 ieee80211_set_vif_encap_ops(sdata); 842 } 843 844 list_for_each_entry(vsdata, &local->interfaces, list) { 845 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 846 vsdata->bss != &sdata->u.ap) 847 continue; 848 849 ieee80211_set_vif_encap_ops(vsdata); 850 } 851 } 852 853 void ieee80211_recalc_offload(struct ieee80211_local *local) 854 { 855 struct ieee80211_sub_if_data *sdata; 856 857 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 858 return; 859 860 mutex_lock(&local->iflist_mtx); 861 862 list_for_each_entry(sdata, &local->interfaces, list) { 863 if (!ieee80211_sdata_running(sdata)) 864 continue; 865 866 ieee80211_recalc_sdata_offload(sdata); 867 } 868 869 mutex_unlock(&local->iflist_mtx); 870 } 871 872 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 873 const int offset) 874 { 875 struct ieee80211_local *local = sdata->local; 876 u32 flags = sdata->u.mntr.flags; 877 878 #define ADJUST(_f, _s) do { \ 879 if (flags & MONITOR_FLAG_##_f) \ 880 local->fif_##_s += offset; \ 881 } while (0) 882 883 ADJUST(FCSFAIL, fcsfail); 884 ADJUST(PLCPFAIL, plcpfail); 885 ADJUST(CONTROL, control); 886 ADJUST(CONTROL, pspoll); 887 ADJUST(OTHER_BSS, other_bss); 888 889 #undef ADJUST 890 } 891 892 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 893 { 894 struct ieee80211_local *local = sdata->local; 895 int i; 896 897 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 898 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 899 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 900 else if (local->hw.queues >= IEEE80211_NUM_ACS) 901 sdata->vif.hw_queue[i] = i; 902 else 903 sdata->vif.hw_queue[i] = 0; 904 } 905 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 906 } 907 908 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 909 { 910 struct ieee80211_sub_if_data *sdata; 911 int ret; 912 913 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 914 return 0; 915 916 ASSERT_RTNL(); 917 918 if (local->monitor_sdata) 919 return 0; 920 921 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 922 if (!sdata) 923 return -ENOMEM; 924 925 /* set up data */ 926 sdata->local = local; 927 sdata->vif.type = NL80211_IFTYPE_MONITOR; 928 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 929 wiphy_name(local->hw.wiphy)); 930 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 931 932 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 933 934 ieee80211_set_default_queues(sdata); 935 936 ret = drv_add_interface(local, sdata); 937 if (WARN_ON(ret)) { 938 /* ok .. stupid driver, it asked for this! */ 939 kfree(sdata); 940 return ret; 941 } 942 943 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 944 if (ret) { 945 kfree(sdata); 946 return ret; 947 } 948 949 mutex_lock(&local->iflist_mtx); 950 rcu_assign_pointer(local->monitor_sdata, sdata); 951 mutex_unlock(&local->iflist_mtx); 952 953 mutex_lock(&local->mtx); 954 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 955 IEEE80211_CHANCTX_EXCLUSIVE); 956 mutex_unlock(&local->mtx); 957 if (ret) { 958 mutex_lock(&local->iflist_mtx); 959 RCU_INIT_POINTER(local->monitor_sdata, NULL); 960 mutex_unlock(&local->iflist_mtx); 961 synchronize_net(); 962 drv_remove_interface(local, sdata); 963 kfree(sdata); 964 return ret; 965 } 966 967 skb_queue_head_init(&sdata->skb_queue); 968 INIT_WORK(&sdata->work, ieee80211_iface_work); 969 970 return 0; 971 } 972 973 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 974 { 975 struct ieee80211_sub_if_data *sdata; 976 977 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 978 return; 979 980 ASSERT_RTNL(); 981 982 mutex_lock(&local->iflist_mtx); 983 984 sdata = rcu_dereference_protected(local->monitor_sdata, 985 lockdep_is_held(&local->iflist_mtx)); 986 if (!sdata) { 987 mutex_unlock(&local->iflist_mtx); 988 return; 989 } 990 991 RCU_INIT_POINTER(local->monitor_sdata, NULL); 992 mutex_unlock(&local->iflist_mtx); 993 994 synchronize_net(); 995 996 mutex_lock(&local->mtx); 997 ieee80211_vif_release_channel(sdata); 998 mutex_unlock(&local->mtx); 999 1000 drv_remove_interface(local, sdata); 1001 1002 kfree(sdata); 1003 } 1004 1005 /* 1006 * NOTE: Be very careful when changing this function, it must NOT return 1007 * an error on interface type changes that have been pre-checked, so most 1008 * checks should be in ieee80211_check_concurrent_iface. 1009 */ 1010 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1011 { 1012 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1013 struct net_device *dev = wdev->netdev; 1014 struct ieee80211_local *local = sdata->local; 1015 u32 changed = 0; 1016 int res; 1017 u32 hw_reconf_flags = 0; 1018 1019 switch (sdata->vif.type) { 1020 case NL80211_IFTYPE_AP_VLAN: { 1021 struct ieee80211_sub_if_data *master; 1022 1023 if (!sdata->bss) 1024 return -ENOLINK; 1025 1026 mutex_lock(&local->mtx); 1027 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1028 mutex_unlock(&local->mtx); 1029 1030 master = container_of(sdata->bss, 1031 struct ieee80211_sub_if_data, u.ap); 1032 sdata->control_port_protocol = 1033 master->control_port_protocol; 1034 sdata->control_port_no_encrypt = 1035 master->control_port_no_encrypt; 1036 sdata->control_port_over_nl80211 = 1037 master->control_port_over_nl80211; 1038 sdata->control_port_no_preauth = 1039 master->control_port_no_preauth; 1040 sdata->vif.cab_queue = master->vif.cab_queue; 1041 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1042 sizeof(sdata->vif.hw_queue)); 1043 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 1044 1045 mutex_lock(&local->key_mtx); 1046 sdata->crypto_tx_tailroom_needed_cnt += 1047 master->crypto_tx_tailroom_needed_cnt; 1048 mutex_unlock(&local->key_mtx); 1049 1050 break; 1051 } 1052 case NL80211_IFTYPE_AP: 1053 sdata->bss = &sdata->u.ap; 1054 break; 1055 case NL80211_IFTYPE_MESH_POINT: 1056 case NL80211_IFTYPE_STATION: 1057 case NL80211_IFTYPE_MONITOR: 1058 case NL80211_IFTYPE_ADHOC: 1059 case NL80211_IFTYPE_P2P_DEVICE: 1060 case NL80211_IFTYPE_OCB: 1061 case NL80211_IFTYPE_NAN: 1062 /* no special treatment */ 1063 break; 1064 case NL80211_IFTYPE_UNSPECIFIED: 1065 case NUM_NL80211_IFTYPES: 1066 case NL80211_IFTYPE_P2P_CLIENT: 1067 case NL80211_IFTYPE_P2P_GO: 1068 case NL80211_IFTYPE_WDS: 1069 /* cannot happen */ 1070 WARN_ON(1); 1071 break; 1072 } 1073 1074 if (local->open_count == 0) { 1075 res = drv_start(local); 1076 if (res) 1077 goto err_del_bss; 1078 /* we're brought up, everything changes */ 1079 hw_reconf_flags = ~0; 1080 ieee80211_led_radio(local, true); 1081 ieee80211_mod_tpt_led_trig(local, 1082 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1083 } 1084 1085 /* 1086 * Copy the hopefully now-present MAC address to 1087 * this interface, if it has the special null one. 1088 */ 1089 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1090 memcpy(dev->dev_addr, 1091 local->hw.wiphy->perm_addr, 1092 ETH_ALEN); 1093 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1094 1095 if (!is_valid_ether_addr(dev->dev_addr)) { 1096 res = -EADDRNOTAVAIL; 1097 goto err_stop; 1098 } 1099 } 1100 1101 switch (sdata->vif.type) { 1102 case NL80211_IFTYPE_AP_VLAN: 1103 /* no need to tell driver, but set carrier and chanctx */ 1104 if (rtnl_dereference(sdata->bss->beacon)) { 1105 ieee80211_vif_vlan_copy_chanctx(sdata); 1106 netif_carrier_on(dev); 1107 ieee80211_set_vif_encap_ops(sdata); 1108 } else { 1109 netif_carrier_off(dev); 1110 } 1111 break; 1112 case NL80211_IFTYPE_MONITOR: 1113 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 1114 local->cooked_mntrs++; 1115 break; 1116 } 1117 1118 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 1119 res = drv_add_interface(local, sdata); 1120 if (res) 1121 goto err_stop; 1122 } else if (local->monitors == 0 && local->open_count == 0) { 1123 res = ieee80211_add_virtual_monitor(local); 1124 if (res) 1125 goto err_stop; 1126 } 1127 1128 /* must be before the call to ieee80211_configure_filter */ 1129 local->monitors++; 1130 if (local->monitors == 1) { 1131 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1132 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1133 } 1134 1135 ieee80211_adjust_monitor_flags(sdata, 1); 1136 ieee80211_configure_filter(local); 1137 ieee80211_recalc_offload(local); 1138 mutex_lock(&local->mtx); 1139 ieee80211_recalc_idle(local); 1140 mutex_unlock(&local->mtx); 1141 1142 netif_carrier_on(dev); 1143 break; 1144 default: 1145 if (coming_up) { 1146 ieee80211_del_virtual_monitor(local); 1147 ieee80211_set_sdata_offload_flags(sdata); 1148 1149 res = drv_add_interface(local, sdata); 1150 if (res) 1151 goto err_stop; 1152 1153 ieee80211_set_vif_encap_ops(sdata); 1154 res = ieee80211_check_queues(sdata, 1155 ieee80211_vif_type_p2p(&sdata->vif)); 1156 if (res) 1157 goto err_del_interface; 1158 } 1159 1160 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1161 local->fif_pspoll++; 1162 local->fif_probe_req++; 1163 1164 ieee80211_configure_filter(local); 1165 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1166 local->fif_probe_req++; 1167 } 1168 1169 if (sdata->vif.probe_req_reg) 1170 drv_config_iface_filter(local, sdata, 1171 FIF_PROBE_REQ, 1172 FIF_PROBE_REQ); 1173 1174 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1175 sdata->vif.type != NL80211_IFTYPE_NAN) 1176 changed |= ieee80211_reset_erp_info(sdata); 1177 ieee80211_bss_info_change_notify(sdata, changed); 1178 1179 switch (sdata->vif.type) { 1180 case NL80211_IFTYPE_STATION: 1181 case NL80211_IFTYPE_ADHOC: 1182 case NL80211_IFTYPE_AP: 1183 case NL80211_IFTYPE_MESH_POINT: 1184 case NL80211_IFTYPE_OCB: 1185 netif_carrier_off(dev); 1186 break; 1187 case NL80211_IFTYPE_P2P_DEVICE: 1188 case NL80211_IFTYPE_NAN: 1189 break; 1190 default: 1191 /* not reached */ 1192 WARN_ON(1); 1193 } 1194 1195 /* 1196 * Set default queue parameters so drivers don't 1197 * need to initialise the hardware if the hardware 1198 * doesn't start up with sane defaults. 1199 * Enable QoS for anything but station interfaces. 1200 */ 1201 ieee80211_set_wmm_default(sdata, true, 1202 sdata->vif.type != NL80211_IFTYPE_STATION); 1203 } 1204 1205 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1206 1207 switch (sdata->vif.type) { 1208 case NL80211_IFTYPE_P2P_DEVICE: 1209 rcu_assign_pointer(local->p2p_sdata, sdata); 1210 break; 1211 case NL80211_IFTYPE_MONITOR: 1212 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 1213 break; 1214 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1215 break; 1216 default: 1217 break; 1218 } 1219 1220 /* 1221 * set_multicast_list will be invoked by the networking core 1222 * which will check whether any increments here were done in 1223 * error and sync them down to the hardware as filter flags. 1224 */ 1225 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1226 atomic_inc(&local->iff_allmultis); 1227 1228 if (coming_up) 1229 local->open_count++; 1230 1231 if (hw_reconf_flags) 1232 ieee80211_hw_config(local, hw_reconf_flags); 1233 1234 ieee80211_recalc_ps(local); 1235 1236 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1237 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1238 local->ops->wake_tx_queue) { 1239 /* XXX: for AP_VLAN, actually track AP queues */ 1240 if (dev) 1241 netif_tx_start_all_queues(dev); 1242 } else if (dev) { 1243 unsigned long flags; 1244 int n_acs = IEEE80211_NUM_ACS; 1245 int ac; 1246 1247 if (local->hw.queues < IEEE80211_NUM_ACS) 1248 n_acs = 1; 1249 1250 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1251 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 1252 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 1253 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 1254 for (ac = 0; ac < n_acs; ac++) { 1255 int ac_queue = sdata->vif.hw_queue[ac]; 1256 1257 if (local->queue_stop_reasons[ac_queue] == 0 && 1258 skb_queue_empty(&local->pending[ac_queue])) 1259 netif_start_subqueue(dev, ac); 1260 } 1261 } 1262 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1263 } 1264 1265 return 0; 1266 err_del_interface: 1267 drv_remove_interface(local, sdata); 1268 err_stop: 1269 if (!local->open_count) 1270 drv_stop(local); 1271 err_del_bss: 1272 sdata->bss = NULL; 1273 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1274 mutex_lock(&local->mtx); 1275 list_del(&sdata->u.vlan.list); 1276 mutex_unlock(&local->mtx); 1277 } 1278 /* might already be clear but that doesn't matter */ 1279 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1280 return res; 1281 } 1282 1283 static void ieee80211_if_free(struct net_device *dev) 1284 { 1285 free_percpu(dev->tstats); 1286 } 1287 1288 static void ieee80211_if_setup(struct net_device *dev) 1289 { 1290 ether_setup(dev); 1291 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1292 dev->netdev_ops = &ieee80211_dataif_ops; 1293 dev->needs_free_netdev = true; 1294 dev->priv_destructor = ieee80211_if_free; 1295 } 1296 1297 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1298 { 1299 ieee80211_if_setup(dev); 1300 dev->priv_flags |= IFF_NO_QUEUE; 1301 } 1302 1303 static void ieee80211_iface_work(struct work_struct *work) 1304 { 1305 struct ieee80211_sub_if_data *sdata = 1306 container_of(work, struct ieee80211_sub_if_data, work); 1307 struct ieee80211_local *local = sdata->local; 1308 struct sk_buff *skb; 1309 struct sta_info *sta; 1310 1311 if (!ieee80211_sdata_running(sdata)) 1312 return; 1313 1314 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1315 return; 1316 1317 if (!ieee80211_can_run_worker(local)) 1318 return; 1319 1320 /* first process frames */ 1321 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1322 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1323 1324 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1325 if (ieee80211_is_action(mgmt->frame_control) && 1326 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1327 int len = skb->len; 1328 1329 mutex_lock(&local->sta_mtx); 1330 sta = sta_info_get_bss(sdata, mgmt->sa); 1331 if (sta) { 1332 switch (mgmt->u.action.u.addba_req.action_code) { 1333 case WLAN_ACTION_ADDBA_REQ: 1334 ieee80211_process_addba_request( 1335 local, sta, mgmt, len); 1336 break; 1337 case WLAN_ACTION_ADDBA_RESP: 1338 ieee80211_process_addba_resp(local, sta, 1339 mgmt, len); 1340 break; 1341 case WLAN_ACTION_DELBA: 1342 ieee80211_process_delba(sdata, sta, 1343 mgmt, len); 1344 break; 1345 default: 1346 WARN_ON(1); 1347 break; 1348 } 1349 } 1350 mutex_unlock(&local->sta_mtx); 1351 } else if (ieee80211_is_action(mgmt->frame_control) && 1352 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1353 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1354 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1355 struct ieee80211_rx_status *status; 1356 enum nl80211_band band; 1357 u8 opmode; 1358 1359 status = IEEE80211_SKB_RXCB(skb); 1360 band = status->band; 1361 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1362 1363 mutex_lock(&local->sta_mtx); 1364 sta = sta_info_get_bss(sdata, mgmt->sa); 1365 1366 if (sta) 1367 ieee80211_vht_handle_opmode(sdata, sta, 1368 opmode, 1369 band); 1370 1371 mutex_unlock(&local->sta_mtx); 1372 break; 1373 } 1374 case WLAN_VHT_ACTION_GROUPID_MGMT: 1375 ieee80211_process_mu_groups(sdata, mgmt); 1376 break; 1377 default: 1378 WARN_ON(1); 1379 break; 1380 } 1381 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1382 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1383 ieee80211_sta_rx_queued_ext(sdata, skb); 1384 else 1385 WARN_ON(1); 1386 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1387 struct ieee80211_hdr *hdr = (void *)mgmt; 1388 /* 1389 * So the frame isn't mgmt, but frame_control 1390 * is at the right place anyway, of course, so 1391 * the if statement is correct. 1392 * 1393 * Warn if we have other data frame types here, 1394 * they must not get here. 1395 */ 1396 WARN_ON(hdr->frame_control & 1397 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1398 WARN_ON(!(hdr->seq_ctrl & 1399 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1400 /* 1401 * This was a fragment of a frame, received while 1402 * a block-ack session was active. That cannot be 1403 * right, so terminate the session. 1404 */ 1405 mutex_lock(&local->sta_mtx); 1406 sta = sta_info_get_bss(sdata, mgmt->sa); 1407 if (sta) { 1408 u16 tid = ieee80211_get_tid(hdr); 1409 1410 __ieee80211_stop_rx_ba_session( 1411 sta, tid, WLAN_BACK_RECIPIENT, 1412 WLAN_REASON_QSTA_REQUIRE_SETUP, 1413 true); 1414 } 1415 mutex_unlock(&local->sta_mtx); 1416 } else switch (sdata->vif.type) { 1417 case NL80211_IFTYPE_STATION: 1418 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1419 break; 1420 case NL80211_IFTYPE_ADHOC: 1421 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1422 break; 1423 case NL80211_IFTYPE_MESH_POINT: 1424 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1425 break; 1426 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1427 break; 1428 default: 1429 WARN(1, "frame for unexpected interface type"); 1430 break; 1431 } 1432 1433 kfree_skb(skb); 1434 kcov_remote_stop(); 1435 } 1436 1437 /* then other type-dependent work */ 1438 switch (sdata->vif.type) { 1439 case NL80211_IFTYPE_STATION: 1440 ieee80211_sta_work(sdata); 1441 break; 1442 case NL80211_IFTYPE_ADHOC: 1443 ieee80211_ibss_work(sdata); 1444 break; 1445 case NL80211_IFTYPE_MESH_POINT: 1446 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1447 break; 1448 ieee80211_mesh_work(sdata); 1449 break; 1450 case NL80211_IFTYPE_OCB: 1451 ieee80211_ocb_work(sdata); 1452 break; 1453 default: 1454 break; 1455 } 1456 } 1457 1458 static void ieee80211_recalc_smps_work(struct work_struct *work) 1459 { 1460 struct ieee80211_sub_if_data *sdata = 1461 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1462 1463 ieee80211_recalc_smps(sdata); 1464 } 1465 1466 /* 1467 * Helper function to initialise an interface to a specific type. 1468 */ 1469 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1470 enum nl80211_iftype type) 1471 { 1472 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1473 0xff, 0xff, 0xff}; 1474 1475 /* clear type-dependent union */ 1476 memset(&sdata->u, 0, sizeof(sdata->u)); 1477 1478 /* and set some type-dependent values */ 1479 sdata->vif.type = type; 1480 sdata->vif.p2p = false; 1481 sdata->wdev.iftype = type; 1482 1483 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1484 sdata->control_port_no_encrypt = false; 1485 sdata->control_port_over_nl80211 = false; 1486 sdata->control_port_no_preauth = false; 1487 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1488 sdata->vif.bss_conf.idle = true; 1489 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1490 1491 sdata->noack_map = 0; 1492 1493 /* only monitor/p2p-device differ */ 1494 if (sdata->dev) { 1495 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1496 sdata->dev->type = ARPHRD_ETHER; 1497 } 1498 1499 skb_queue_head_init(&sdata->skb_queue); 1500 INIT_WORK(&sdata->work, ieee80211_iface_work); 1501 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1502 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1503 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1504 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1505 1506 switch (type) { 1507 case NL80211_IFTYPE_P2P_GO: 1508 type = NL80211_IFTYPE_AP; 1509 sdata->vif.type = type; 1510 sdata->vif.p2p = true; 1511 fallthrough; 1512 case NL80211_IFTYPE_AP: 1513 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1514 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1515 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1516 break; 1517 case NL80211_IFTYPE_P2P_CLIENT: 1518 type = NL80211_IFTYPE_STATION; 1519 sdata->vif.type = type; 1520 sdata->vif.p2p = true; 1521 fallthrough; 1522 case NL80211_IFTYPE_STATION: 1523 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1524 ieee80211_sta_setup_sdata(sdata); 1525 break; 1526 case NL80211_IFTYPE_OCB: 1527 sdata->vif.bss_conf.bssid = bssid_wildcard; 1528 ieee80211_ocb_setup_sdata(sdata); 1529 break; 1530 case NL80211_IFTYPE_ADHOC: 1531 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1532 ieee80211_ibss_setup_sdata(sdata); 1533 break; 1534 case NL80211_IFTYPE_MESH_POINT: 1535 if (ieee80211_vif_is_mesh(&sdata->vif)) 1536 ieee80211_mesh_init_sdata(sdata); 1537 break; 1538 case NL80211_IFTYPE_MONITOR: 1539 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1540 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1541 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1542 MONITOR_FLAG_OTHER_BSS; 1543 break; 1544 case NL80211_IFTYPE_NAN: 1545 idr_init(&sdata->u.nan.function_inst_ids); 1546 spin_lock_init(&sdata->u.nan.func_lock); 1547 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1548 break; 1549 case NL80211_IFTYPE_AP_VLAN: 1550 case NL80211_IFTYPE_P2P_DEVICE: 1551 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1552 break; 1553 case NL80211_IFTYPE_UNSPECIFIED: 1554 case NL80211_IFTYPE_WDS: 1555 case NUM_NL80211_IFTYPES: 1556 WARN_ON(1); 1557 break; 1558 } 1559 1560 ieee80211_debugfs_add_netdev(sdata); 1561 } 1562 1563 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1564 enum nl80211_iftype type) 1565 { 1566 struct ieee80211_local *local = sdata->local; 1567 int ret, err; 1568 enum nl80211_iftype internal_type = type; 1569 bool p2p = false; 1570 1571 ASSERT_RTNL(); 1572 1573 if (!local->ops->change_interface) 1574 return -EBUSY; 1575 1576 switch (sdata->vif.type) { 1577 case NL80211_IFTYPE_AP: 1578 case NL80211_IFTYPE_STATION: 1579 case NL80211_IFTYPE_ADHOC: 1580 case NL80211_IFTYPE_OCB: 1581 /* 1582 * Could maybe also all others here? 1583 * Just not sure how that interacts 1584 * with the RX/config path e.g. for 1585 * mesh. 1586 */ 1587 break; 1588 default: 1589 return -EBUSY; 1590 } 1591 1592 switch (type) { 1593 case NL80211_IFTYPE_AP: 1594 case NL80211_IFTYPE_STATION: 1595 case NL80211_IFTYPE_ADHOC: 1596 case NL80211_IFTYPE_OCB: 1597 /* 1598 * Could probably support everything 1599 * but here. 1600 */ 1601 break; 1602 case NL80211_IFTYPE_P2P_CLIENT: 1603 p2p = true; 1604 internal_type = NL80211_IFTYPE_STATION; 1605 break; 1606 case NL80211_IFTYPE_P2P_GO: 1607 p2p = true; 1608 internal_type = NL80211_IFTYPE_AP; 1609 break; 1610 default: 1611 return -EBUSY; 1612 } 1613 1614 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1615 if (ret) 1616 return ret; 1617 1618 ieee80211_do_stop(sdata, false); 1619 1620 ieee80211_teardown_sdata(sdata); 1621 1622 ieee80211_set_sdata_offload_flags(sdata); 1623 ret = drv_change_interface(local, sdata, internal_type, p2p); 1624 if (ret) 1625 type = ieee80211_vif_type_p2p(&sdata->vif); 1626 1627 /* 1628 * Ignore return value here, there's not much we can do since 1629 * the driver changed the interface type internally already. 1630 * The warnings will hopefully make driver authors fix it :-) 1631 */ 1632 ieee80211_check_queues(sdata, type); 1633 1634 ieee80211_setup_sdata(sdata, type); 1635 ieee80211_set_vif_encap_ops(sdata); 1636 1637 err = ieee80211_do_open(&sdata->wdev, false); 1638 WARN(err, "type change: do_open returned %d", err); 1639 1640 return ret; 1641 } 1642 1643 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1644 enum nl80211_iftype type) 1645 { 1646 int ret; 1647 1648 ASSERT_RTNL(); 1649 1650 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1651 return 0; 1652 1653 if (ieee80211_sdata_running(sdata)) { 1654 ret = ieee80211_runtime_change_iftype(sdata, type); 1655 if (ret) 1656 return ret; 1657 } else { 1658 /* Purge and reset type-dependent state. */ 1659 ieee80211_teardown_sdata(sdata); 1660 ieee80211_setup_sdata(sdata, type); 1661 } 1662 1663 /* reset some values that shouldn't be kept across type changes */ 1664 if (type == NL80211_IFTYPE_STATION) 1665 sdata->u.mgd.use_4addr = false; 1666 1667 return 0; 1668 } 1669 1670 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1671 u8 *perm_addr, enum nl80211_iftype type) 1672 { 1673 struct ieee80211_sub_if_data *sdata; 1674 u64 mask, start, addr, val, inc; 1675 u8 *m; 1676 u8 tmp_addr[ETH_ALEN]; 1677 int i; 1678 1679 /* default ... something at least */ 1680 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1681 1682 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1683 local->hw.wiphy->n_addresses <= 1) 1684 return; 1685 1686 mutex_lock(&local->iflist_mtx); 1687 1688 switch (type) { 1689 case NL80211_IFTYPE_MONITOR: 1690 /* doesn't matter */ 1691 break; 1692 case NL80211_IFTYPE_AP_VLAN: 1693 /* match up with an AP interface */ 1694 list_for_each_entry(sdata, &local->interfaces, list) { 1695 if (sdata->vif.type != NL80211_IFTYPE_AP) 1696 continue; 1697 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1698 break; 1699 } 1700 /* keep default if no AP interface present */ 1701 break; 1702 case NL80211_IFTYPE_P2P_CLIENT: 1703 case NL80211_IFTYPE_P2P_GO: 1704 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1705 list_for_each_entry(sdata, &local->interfaces, list) { 1706 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1707 continue; 1708 if (!ieee80211_sdata_running(sdata)) 1709 continue; 1710 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1711 goto out_unlock; 1712 } 1713 } 1714 fallthrough; 1715 default: 1716 /* assign a new address if possible -- try n_addresses first */ 1717 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1718 bool used = false; 1719 1720 list_for_each_entry(sdata, &local->interfaces, list) { 1721 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1722 sdata->vif.addr)) { 1723 used = true; 1724 break; 1725 } 1726 } 1727 1728 if (!used) { 1729 memcpy(perm_addr, 1730 local->hw.wiphy->addresses[i].addr, 1731 ETH_ALEN); 1732 break; 1733 } 1734 } 1735 1736 /* try mask if available */ 1737 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1738 break; 1739 1740 m = local->hw.wiphy->addr_mask; 1741 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1742 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1743 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1744 1745 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1746 /* not a contiguous mask ... not handled now! */ 1747 pr_info("not contiguous\n"); 1748 break; 1749 } 1750 1751 /* 1752 * Pick address of existing interface in case user changed 1753 * MAC address manually, default to perm_addr. 1754 */ 1755 m = local->hw.wiphy->perm_addr; 1756 list_for_each_entry(sdata, &local->interfaces, list) { 1757 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1758 continue; 1759 m = sdata->vif.addr; 1760 break; 1761 } 1762 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1763 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1764 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1765 1766 inc = 1ULL<<__ffs64(mask); 1767 val = (start & mask); 1768 addr = (start & ~mask) | (val & mask); 1769 do { 1770 bool used = false; 1771 1772 tmp_addr[5] = addr >> 0*8; 1773 tmp_addr[4] = addr >> 1*8; 1774 tmp_addr[3] = addr >> 2*8; 1775 tmp_addr[2] = addr >> 3*8; 1776 tmp_addr[1] = addr >> 4*8; 1777 tmp_addr[0] = addr >> 5*8; 1778 1779 val += inc; 1780 1781 list_for_each_entry(sdata, &local->interfaces, list) { 1782 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1783 used = true; 1784 break; 1785 } 1786 } 1787 1788 if (!used) { 1789 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1790 break; 1791 } 1792 addr = (start & ~mask) | (val & mask); 1793 } while (addr != start); 1794 1795 break; 1796 } 1797 1798 out_unlock: 1799 mutex_unlock(&local->iflist_mtx); 1800 } 1801 1802 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1803 unsigned char name_assign_type, 1804 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1805 struct vif_params *params) 1806 { 1807 struct net_device *ndev = NULL; 1808 struct ieee80211_sub_if_data *sdata = NULL; 1809 struct txq_info *txqi; 1810 void (*if_setup)(struct net_device *dev); 1811 int ret, i; 1812 int txqs = 1; 1813 1814 ASSERT_RTNL(); 1815 1816 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1817 struct wireless_dev *wdev; 1818 1819 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1820 GFP_KERNEL); 1821 if (!sdata) 1822 return -ENOMEM; 1823 wdev = &sdata->wdev; 1824 1825 sdata->dev = NULL; 1826 strlcpy(sdata->name, name, IFNAMSIZ); 1827 ieee80211_assign_perm_addr(local, wdev->address, type); 1828 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1829 } else { 1830 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1831 sizeof(void *)); 1832 int txq_size = 0; 1833 1834 if (local->ops->wake_tx_queue && 1835 type != NL80211_IFTYPE_AP_VLAN && 1836 (type != NL80211_IFTYPE_MONITOR || 1837 (params->flags & MONITOR_FLAG_ACTIVE))) 1838 txq_size += sizeof(struct txq_info) + 1839 local->hw.txq_data_size; 1840 1841 if (local->ops->wake_tx_queue) { 1842 if_setup = ieee80211_if_setup_no_queue; 1843 } else { 1844 if_setup = ieee80211_if_setup; 1845 if (local->hw.queues >= IEEE80211_NUM_ACS) 1846 txqs = IEEE80211_NUM_ACS; 1847 } 1848 1849 ndev = alloc_netdev_mqs(size + txq_size, 1850 name, name_assign_type, 1851 if_setup, txqs, 1); 1852 if (!ndev) 1853 return -ENOMEM; 1854 1855 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 1856 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 1857 1858 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1859 1860 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1861 if (!ndev->tstats) { 1862 free_netdev(ndev); 1863 return -ENOMEM; 1864 } 1865 1866 ndev->needed_headroom = local->tx_headroom + 1867 4*6 /* four MAC addresses */ 1868 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1869 + 6 /* mesh */ 1870 + 8 /* rfc1042/bridge tunnel */ 1871 - ETH_HLEN /* ethernet hard_header_len */ 1872 + IEEE80211_ENCRYPT_HEADROOM; 1873 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1874 1875 ret = dev_alloc_name(ndev, ndev->name); 1876 if (ret < 0) { 1877 ieee80211_if_free(ndev); 1878 free_netdev(ndev); 1879 return ret; 1880 } 1881 1882 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1883 if (is_valid_ether_addr(params->macaddr)) 1884 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1885 else 1886 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1887 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1888 1889 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1890 sdata = netdev_priv(ndev); 1891 ndev->ieee80211_ptr = &sdata->wdev; 1892 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1893 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1894 1895 if (txq_size) { 1896 txqi = netdev_priv(ndev) + size; 1897 ieee80211_txq_init(sdata, NULL, txqi, 0); 1898 } 1899 1900 sdata->dev = ndev; 1901 } 1902 1903 /* initialise type-independent data */ 1904 sdata->wdev.wiphy = local->hw.wiphy; 1905 sdata->local = local; 1906 1907 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1908 skb_queue_head_init(&sdata->fragments[i].skb_list); 1909 1910 INIT_LIST_HEAD(&sdata->key_list); 1911 1912 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1913 ieee80211_dfs_cac_timer_work); 1914 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1915 ieee80211_delayed_tailroom_dec); 1916 1917 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1918 struct ieee80211_supported_band *sband; 1919 sband = local->hw.wiphy->bands[i]; 1920 sdata->rc_rateidx_mask[i] = 1921 sband ? (1 << sband->n_bitrates) - 1 : 0; 1922 if (sband) { 1923 __le16 cap; 1924 u16 *vht_rate_mask; 1925 1926 memcpy(sdata->rc_rateidx_mcs_mask[i], 1927 sband->ht_cap.mcs.rx_mask, 1928 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1929 1930 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1931 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1932 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1933 } else { 1934 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1935 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1936 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1937 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1938 } 1939 } 1940 1941 ieee80211_set_default_queues(sdata); 1942 1943 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1944 sdata->user_power_level = local->user_power_level; 1945 1946 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1947 1948 /* setup type-dependent data */ 1949 ieee80211_setup_sdata(sdata, type); 1950 1951 if (ndev) { 1952 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1953 if (type == NL80211_IFTYPE_STATION) 1954 sdata->u.mgd.use_4addr = params->use_4addr; 1955 1956 ndev->features |= local->hw.netdev_features; 1957 ndev->hw_features |= ndev->features & 1958 MAC80211_SUPPORTED_FEATURES_TX; 1959 1960 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1961 1962 /* MTU range: 256 - 2304 */ 1963 ndev->min_mtu = 256; 1964 ndev->max_mtu = local->hw.max_mtu; 1965 1966 ret = register_netdevice(ndev); 1967 if (ret) { 1968 free_netdev(ndev); 1969 return ret; 1970 } 1971 } 1972 1973 mutex_lock(&local->iflist_mtx); 1974 list_add_tail_rcu(&sdata->list, &local->interfaces); 1975 mutex_unlock(&local->iflist_mtx); 1976 1977 if (new_wdev) 1978 *new_wdev = &sdata->wdev; 1979 1980 return 0; 1981 } 1982 1983 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1984 { 1985 ASSERT_RTNL(); 1986 1987 mutex_lock(&sdata->local->iflist_mtx); 1988 list_del_rcu(&sdata->list); 1989 mutex_unlock(&sdata->local->iflist_mtx); 1990 1991 if (sdata->vif.txq) 1992 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 1993 1994 synchronize_rcu(); 1995 1996 if (sdata->dev) { 1997 unregister_netdevice(sdata->dev); 1998 } else { 1999 cfg80211_unregister_wdev(&sdata->wdev); 2000 ieee80211_teardown_sdata(sdata); 2001 kfree(sdata); 2002 } 2003 } 2004 2005 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2006 { 2007 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2008 return; 2009 ieee80211_do_stop(sdata, true); 2010 } 2011 2012 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2013 { 2014 struct ieee80211_sub_if_data *sdata, *tmp; 2015 LIST_HEAD(unreg_list); 2016 LIST_HEAD(wdev_list); 2017 2018 ASSERT_RTNL(); 2019 2020 /* Before destroying the interfaces, make sure they're all stopped so 2021 * that the hardware is stopped. Otherwise, the driver might still be 2022 * iterating the interfaces during the shutdown, e.g. from a worker 2023 * or from RX processing or similar, and if it does so (using atomic 2024 * iteration) while we're manipulating the list, the iteration will 2025 * crash. 2026 * 2027 * After this, the hardware should be stopped and the driver should 2028 * have stopped all of its activities, so that we can do RCU-unaware 2029 * manipulations of the interface list below. 2030 */ 2031 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2032 2033 WARN(local->open_count, "%s: open count remains %d\n", 2034 wiphy_name(local->hw.wiphy), local->open_count); 2035 2036 ieee80211_txq_teardown_flows(local); 2037 2038 mutex_lock(&local->iflist_mtx); 2039 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2040 list_del(&sdata->list); 2041 2042 if (sdata->dev) 2043 unregister_netdevice_queue(sdata->dev, &unreg_list); 2044 else 2045 list_add(&sdata->list, &wdev_list); 2046 } 2047 mutex_unlock(&local->iflist_mtx); 2048 unregister_netdevice_many(&unreg_list); 2049 2050 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2051 list_del(&sdata->list); 2052 cfg80211_unregister_wdev(&sdata->wdev); 2053 kfree(sdata); 2054 } 2055 } 2056 2057 static int netdev_notify(struct notifier_block *nb, 2058 unsigned long state, void *ptr) 2059 { 2060 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2061 struct ieee80211_sub_if_data *sdata; 2062 2063 if (state != NETDEV_CHANGENAME) 2064 return NOTIFY_DONE; 2065 2066 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2067 return NOTIFY_DONE; 2068 2069 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2070 return NOTIFY_DONE; 2071 2072 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2073 memcpy(sdata->name, dev->name, IFNAMSIZ); 2074 ieee80211_debugfs_rename_netdev(sdata); 2075 2076 return NOTIFY_OK; 2077 } 2078 2079 static struct notifier_block mac80211_netdev_notifier = { 2080 .notifier_call = netdev_notify, 2081 }; 2082 2083 int ieee80211_iface_init(void) 2084 { 2085 return register_netdevice_notifier(&mac80211_netdev_notifier); 2086 } 2087 2088 void ieee80211_iface_exit(void) 2089 { 2090 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2091 } 2092 2093 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2094 { 2095 if (sdata->vif.type == NL80211_IFTYPE_AP) 2096 atomic_inc(&sdata->u.ap.num_mcast_sta); 2097 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2098 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2099 } 2100 2101 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2102 { 2103 if (sdata->vif.type == NL80211_IFTYPE_AP) 2104 atomic_dec(&sdata->u.ap.num_mcast_sta); 2105 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2106 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2107 } 2108