1 /* 2 * Interface handling 3 * 4 * Copyright 2002-2005, Instant802 Networks, Inc. 5 * Copyright 2005-2006, Devicescape Software, Inc. 6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * Copyright (c) 2016 Intel Deutschland GmbH 10 * Copyright (C) 2018 Intel Corporation 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 */ 16 #include <linux/slab.h> 17 #include <linux/kernel.h> 18 #include <linux/if_arp.h> 19 #include <linux/netdevice.h> 20 #include <linux/rtnetlink.h> 21 #include <net/mac80211.h> 22 #include <net/ieee80211_radiotap.h> 23 #include "ieee80211_i.h" 24 #include "sta_info.h" 25 #include "debugfs_netdev.h" 26 #include "mesh.h" 27 #include "led.h" 28 #include "driver-ops.h" 29 #include "wme.h" 30 #include "rate.h" 31 32 /** 33 * DOC: Interface list locking 34 * 35 * The interface list in each struct ieee80211_local is protected 36 * three-fold: 37 * 38 * (1) modifications may only be done under the RTNL 39 * (2) modifications and readers are protected against each other by 40 * the iflist_mtx. 41 * (3) modifications are done in an RCU manner so atomic readers 42 * can traverse the list in RCU-safe blocks. 43 * 44 * As a consequence, reads (traversals) of the list can be protected 45 * by either the RTNL, the iflist_mtx or RCU. 46 */ 47 48 static void ieee80211_iface_work(struct work_struct *work); 49 50 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 51 { 52 struct ieee80211_chanctx_conf *chanctx_conf; 53 int power; 54 55 rcu_read_lock(); 56 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 57 if (!chanctx_conf) { 58 rcu_read_unlock(); 59 return false; 60 } 61 62 power = ieee80211_chandef_max_power(&chanctx_conf->def); 63 rcu_read_unlock(); 64 65 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 66 power = min(power, sdata->user_power_level); 67 68 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 69 power = min(power, sdata->ap_power_level); 70 71 if (power != sdata->vif.bss_conf.txpower) { 72 sdata->vif.bss_conf.txpower = power; 73 ieee80211_hw_config(sdata->local, 0); 74 return true; 75 } 76 77 return false; 78 } 79 80 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 81 bool update_bss) 82 { 83 if (__ieee80211_recalc_txpower(sdata) || 84 (update_bss && ieee80211_sdata_running(sdata))) 85 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 86 } 87 88 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 89 { 90 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 91 return 0; 92 93 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 94 return IEEE80211_CONF_CHANGE_IDLE; 95 } 96 97 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 98 { 99 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 100 return 0; 101 102 ieee80211_flush_queues(local, NULL, false); 103 104 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 105 return IEEE80211_CONF_CHANGE_IDLE; 106 } 107 108 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 109 bool force_active) 110 { 111 bool working, scanning, active; 112 unsigned int led_trig_start = 0, led_trig_stop = 0; 113 114 lockdep_assert_held(&local->mtx); 115 116 active = force_active || 117 !list_empty(&local->chanctx_list) || 118 local->monitors; 119 120 working = !local->ops->remain_on_channel && 121 !list_empty(&local->roc_list); 122 123 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 124 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 125 126 if (working || scanning) 127 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 128 else 129 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 130 131 if (active) 132 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 133 else 134 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 135 136 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 137 138 if (working || scanning || active) 139 return __ieee80211_idle_off(local); 140 return __ieee80211_idle_on(local); 141 } 142 143 u32 ieee80211_idle_off(struct ieee80211_local *local) 144 { 145 return __ieee80211_recalc_idle(local, true); 146 } 147 148 void ieee80211_recalc_idle(struct ieee80211_local *local) 149 { 150 u32 change = __ieee80211_recalc_idle(local, false); 151 if (change) 152 ieee80211_hw_config(local, change); 153 } 154 155 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 156 bool check_dup) 157 { 158 struct ieee80211_local *local = sdata->local; 159 struct ieee80211_sub_if_data *iter; 160 u64 new, mask, tmp; 161 u8 *m; 162 int ret = 0; 163 164 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 165 return 0; 166 167 m = addr; 168 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 169 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 170 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 171 172 m = local->hw.wiphy->addr_mask; 173 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 176 177 if (!check_dup) 178 return ret; 179 180 mutex_lock(&local->iflist_mtx); 181 list_for_each_entry(iter, &local->interfaces, list) { 182 if (iter == sdata) 183 continue; 184 185 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 186 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 187 continue; 188 189 m = iter->vif.addr; 190 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 191 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 192 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 193 194 if ((new & ~mask) != (tmp & ~mask)) { 195 ret = -EINVAL; 196 break; 197 } 198 } 199 mutex_unlock(&local->iflist_mtx); 200 201 return ret; 202 } 203 204 static int ieee80211_change_mac(struct net_device *dev, void *addr) 205 { 206 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 207 struct sockaddr *sa = addr; 208 bool check_dup = true; 209 int ret; 210 211 if (ieee80211_sdata_running(sdata)) 212 return -EBUSY; 213 214 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 215 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 216 check_dup = false; 217 218 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 219 if (ret) 220 return ret; 221 222 ret = eth_mac_addr(dev, sa); 223 224 if (ret == 0) 225 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 226 227 return ret; 228 } 229 230 static inline int identical_mac_addr_allowed(int type1, int type2) 231 { 232 return type1 == NL80211_IFTYPE_MONITOR || 233 type2 == NL80211_IFTYPE_MONITOR || 234 type1 == NL80211_IFTYPE_P2P_DEVICE || 235 type2 == NL80211_IFTYPE_P2P_DEVICE || 236 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 237 (type1 == NL80211_IFTYPE_WDS && 238 (type2 == NL80211_IFTYPE_WDS || 239 type2 == NL80211_IFTYPE_AP)) || 240 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 241 (type1 == NL80211_IFTYPE_AP_VLAN && 242 (type2 == NL80211_IFTYPE_AP || 243 type2 == NL80211_IFTYPE_AP_VLAN)); 244 } 245 246 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 247 enum nl80211_iftype iftype) 248 { 249 struct ieee80211_local *local = sdata->local; 250 struct ieee80211_sub_if_data *nsdata; 251 int ret; 252 253 ASSERT_RTNL(); 254 255 /* we hold the RTNL here so can safely walk the list */ 256 list_for_each_entry(nsdata, &local->interfaces, list) { 257 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 258 /* 259 * Only OCB and monitor mode may coexist 260 */ 261 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 262 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 263 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 264 nsdata->vif.type == NL80211_IFTYPE_OCB)) 265 return -EBUSY; 266 267 /* 268 * Allow only a single IBSS interface to be up at any 269 * time. This is restricted because beacon distribution 270 * cannot work properly if both are in the same IBSS. 271 * 272 * To remove this restriction we'd have to disallow them 273 * from setting the same SSID on different IBSS interfaces 274 * belonging to the same hardware. Then, however, we're 275 * faced with having to adopt two different TSF timers... 276 */ 277 if (iftype == NL80211_IFTYPE_ADHOC && 278 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 279 return -EBUSY; 280 /* 281 * will not add another interface while any channel 282 * switch is active. 283 */ 284 if (nsdata->vif.csa_active) 285 return -EBUSY; 286 287 /* 288 * The remaining checks are only performed for interfaces 289 * with the same MAC address. 290 */ 291 if (!ether_addr_equal(sdata->vif.addr, 292 nsdata->vif.addr)) 293 continue; 294 295 /* 296 * check whether it may have the same address 297 */ 298 if (!identical_mac_addr_allowed(iftype, 299 nsdata->vif.type)) 300 return -ENOTUNIQ; 301 302 /* 303 * can only add VLANs to enabled APs 304 */ 305 if (iftype == NL80211_IFTYPE_AP_VLAN && 306 nsdata->vif.type == NL80211_IFTYPE_AP) 307 sdata->bss = &nsdata->u.ap; 308 } 309 } 310 311 mutex_lock(&local->chanctx_mtx); 312 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 313 mutex_unlock(&local->chanctx_mtx); 314 return ret; 315 } 316 317 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 318 enum nl80211_iftype iftype) 319 { 320 int n_queues = sdata->local->hw.queues; 321 int i; 322 323 if (iftype == NL80211_IFTYPE_NAN) 324 return 0; 325 326 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 327 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 329 IEEE80211_INVAL_HW_QUEUE)) 330 return -EINVAL; 331 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 332 n_queues)) 333 return -EINVAL; 334 } 335 } 336 337 if ((iftype != NL80211_IFTYPE_AP && 338 iftype != NL80211_IFTYPE_P2P_GO && 339 iftype != NL80211_IFTYPE_MESH_POINT) || 340 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 341 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 342 return 0; 343 } 344 345 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 346 return -EINVAL; 347 348 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 349 return -EINVAL; 350 351 return 0; 352 } 353 354 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 355 const int offset) 356 { 357 struct ieee80211_local *local = sdata->local; 358 u32 flags = sdata->u.mntr.flags; 359 360 #define ADJUST(_f, _s) do { \ 361 if (flags & MONITOR_FLAG_##_f) \ 362 local->fif_##_s += offset; \ 363 } while (0) 364 365 ADJUST(FCSFAIL, fcsfail); 366 ADJUST(PLCPFAIL, plcpfail); 367 ADJUST(CONTROL, control); 368 ADJUST(CONTROL, pspoll); 369 ADJUST(OTHER_BSS, other_bss); 370 371 #undef ADJUST 372 } 373 374 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 375 { 376 struct ieee80211_local *local = sdata->local; 377 int i; 378 379 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 380 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 381 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 382 else if (local->hw.queues >= IEEE80211_NUM_ACS) 383 sdata->vif.hw_queue[i] = i; 384 else 385 sdata->vif.hw_queue[i] = 0; 386 } 387 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 388 } 389 390 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 391 { 392 struct ieee80211_sub_if_data *sdata; 393 int ret; 394 395 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 396 return 0; 397 398 ASSERT_RTNL(); 399 400 if (local->monitor_sdata) 401 return 0; 402 403 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 404 if (!sdata) 405 return -ENOMEM; 406 407 /* set up data */ 408 sdata->local = local; 409 sdata->vif.type = NL80211_IFTYPE_MONITOR; 410 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 411 wiphy_name(local->hw.wiphy)); 412 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 413 414 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 415 416 ieee80211_set_default_queues(sdata); 417 418 ret = drv_add_interface(local, sdata); 419 if (WARN_ON(ret)) { 420 /* ok .. stupid driver, it asked for this! */ 421 kfree(sdata); 422 return ret; 423 } 424 425 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 426 if (ret) { 427 kfree(sdata); 428 return ret; 429 } 430 431 mutex_lock(&local->iflist_mtx); 432 rcu_assign_pointer(local->monitor_sdata, sdata); 433 mutex_unlock(&local->iflist_mtx); 434 435 mutex_lock(&local->mtx); 436 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 437 IEEE80211_CHANCTX_EXCLUSIVE); 438 mutex_unlock(&local->mtx); 439 if (ret) { 440 mutex_lock(&local->iflist_mtx); 441 RCU_INIT_POINTER(local->monitor_sdata, NULL); 442 mutex_unlock(&local->iflist_mtx); 443 synchronize_net(); 444 drv_remove_interface(local, sdata); 445 kfree(sdata); 446 return ret; 447 } 448 449 skb_queue_head_init(&sdata->skb_queue); 450 INIT_WORK(&sdata->work, ieee80211_iface_work); 451 452 return 0; 453 } 454 455 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 456 { 457 struct ieee80211_sub_if_data *sdata; 458 459 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 460 return; 461 462 ASSERT_RTNL(); 463 464 mutex_lock(&local->iflist_mtx); 465 466 sdata = rcu_dereference_protected(local->monitor_sdata, 467 lockdep_is_held(&local->iflist_mtx)); 468 if (!sdata) { 469 mutex_unlock(&local->iflist_mtx); 470 return; 471 } 472 473 RCU_INIT_POINTER(local->monitor_sdata, NULL); 474 mutex_unlock(&local->iflist_mtx); 475 476 synchronize_net(); 477 478 mutex_lock(&local->mtx); 479 ieee80211_vif_release_channel(sdata); 480 mutex_unlock(&local->mtx); 481 482 drv_remove_interface(local, sdata); 483 484 kfree(sdata); 485 } 486 487 /* 488 * NOTE: Be very careful when changing this function, it must NOT return 489 * an error on interface type changes that have been pre-checked, so most 490 * checks should be in ieee80211_check_concurrent_iface. 491 */ 492 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 493 { 494 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 495 struct net_device *dev = wdev->netdev; 496 struct ieee80211_local *local = sdata->local; 497 struct sta_info *sta; 498 u32 changed = 0; 499 int res; 500 u32 hw_reconf_flags = 0; 501 502 switch (sdata->vif.type) { 503 case NL80211_IFTYPE_WDS: 504 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 505 return -ENOLINK; 506 break; 507 case NL80211_IFTYPE_AP_VLAN: { 508 struct ieee80211_sub_if_data *master; 509 510 if (!sdata->bss) 511 return -ENOLINK; 512 513 mutex_lock(&local->mtx); 514 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 515 mutex_unlock(&local->mtx); 516 517 master = container_of(sdata->bss, 518 struct ieee80211_sub_if_data, u.ap); 519 sdata->control_port_protocol = 520 master->control_port_protocol; 521 sdata->control_port_no_encrypt = 522 master->control_port_no_encrypt; 523 sdata->control_port_over_nl80211 = 524 master->control_port_over_nl80211; 525 sdata->vif.cab_queue = master->vif.cab_queue; 526 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 527 sizeof(sdata->vif.hw_queue)); 528 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 529 530 mutex_lock(&local->key_mtx); 531 sdata->crypto_tx_tailroom_needed_cnt += 532 master->crypto_tx_tailroom_needed_cnt; 533 mutex_unlock(&local->key_mtx); 534 535 break; 536 } 537 case NL80211_IFTYPE_AP: 538 sdata->bss = &sdata->u.ap; 539 break; 540 case NL80211_IFTYPE_MESH_POINT: 541 case NL80211_IFTYPE_STATION: 542 case NL80211_IFTYPE_MONITOR: 543 case NL80211_IFTYPE_ADHOC: 544 case NL80211_IFTYPE_P2P_DEVICE: 545 case NL80211_IFTYPE_OCB: 546 case NL80211_IFTYPE_NAN: 547 /* no special treatment */ 548 break; 549 case NL80211_IFTYPE_UNSPECIFIED: 550 case NUM_NL80211_IFTYPES: 551 case NL80211_IFTYPE_P2P_CLIENT: 552 case NL80211_IFTYPE_P2P_GO: 553 /* cannot happen */ 554 WARN_ON(1); 555 break; 556 } 557 558 if (local->open_count == 0) { 559 res = drv_start(local); 560 if (res) 561 goto err_del_bss; 562 /* we're brought up, everything changes */ 563 hw_reconf_flags = ~0; 564 ieee80211_led_radio(local, true); 565 ieee80211_mod_tpt_led_trig(local, 566 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 567 } 568 569 /* 570 * Copy the hopefully now-present MAC address to 571 * this interface, if it has the special null one. 572 */ 573 if (dev && is_zero_ether_addr(dev->dev_addr)) { 574 memcpy(dev->dev_addr, 575 local->hw.wiphy->perm_addr, 576 ETH_ALEN); 577 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 578 579 if (!is_valid_ether_addr(dev->dev_addr)) { 580 res = -EADDRNOTAVAIL; 581 goto err_stop; 582 } 583 } 584 585 switch (sdata->vif.type) { 586 case NL80211_IFTYPE_AP_VLAN: 587 /* no need to tell driver, but set carrier and chanctx */ 588 if (rtnl_dereference(sdata->bss->beacon)) { 589 ieee80211_vif_vlan_copy_chanctx(sdata); 590 netif_carrier_on(dev); 591 } else { 592 netif_carrier_off(dev); 593 } 594 break; 595 case NL80211_IFTYPE_MONITOR: 596 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 597 local->cooked_mntrs++; 598 break; 599 } 600 601 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 602 res = drv_add_interface(local, sdata); 603 if (res) 604 goto err_stop; 605 } else if (local->monitors == 0 && local->open_count == 0) { 606 res = ieee80211_add_virtual_monitor(local); 607 if (res) 608 goto err_stop; 609 } 610 611 /* must be before the call to ieee80211_configure_filter */ 612 local->monitors++; 613 if (local->monitors == 1) { 614 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 615 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 616 } 617 618 ieee80211_adjust_monitor_flags(sdata, 1); 619 ieee80211_configure_filter(local); 620 mutex_lock(&local->mtx); 621 ieee80211_recalc_idle(local); 622 mutex_unlock(&local->mtx); 623 624 netif_carrier_on(dev); 625 break; 626 default: 627 if (coming_up) { 628 ieee80211_del_virtual_monitor(local); 629 630 res = drv_add_interface(local, sdata); 631 if (res) 632 goto err_stop; 633 res = ieee80211_check_queues(sdata, 634 ieee80211_vif_type_p2p(&sdata->vif)); 635 if (res) 636 goto err_del_interface; 637 } 638 639 if (sdata->vif.type == NL80211_IFTYPE_AP) { 640 local->fif_pspoll++; 641 local->fif_probe_req++; 642 643 ieee80211_configure_filter(local); 644 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 645 local->fif_probe_req++; 646 } 647 648 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 649 sdata->vif.type != NL80211_IFTYPE_NAN) 650 changed |= ieee80211_reset_erp_info(sdata); 651 ieee80211_bss_info_change_notify(sdata, changed); 652 653 switch (sdata->vif.type) { 654 case NL80211_IFTYPE_STATION: 655 case NL80211_IFTYPE_ADHOC: 656 case NL80211_IFTYPE_AP: 657 case NL80211_IFTYPE_MESH_POINT: 658 case NL80211_IFTYPE_OCB: 659 netif_carrier_off(dev); 660 break; 661 case NL80211_IFTYPE_WDS: 662 case NL80211_IFTYPE_P2P_DEVICE: 663 case NL80211_IFTYPE_NAN: 664 break; 665 default: 666 /* not reached */ 667 WARN_ON(1); 668 } 669 670 /* 671 * Set default queue parameters so drivers don't 672 * need to initialise the hardware if the hardware 673 * doesn't start up with sane defaults. 674 * Enable QoS for anything but station interfaces. 675 */ 676 ieee80211_set_wmm_default(sdata, true, 677 sdata->vif.type != NL80211_IFTYPE_STATION); 678 } 679 680 set_bit(SDATA_STATE_RUNNING, &sdata->state); 681 682 switch (sdata->vif.type) { 683 case NL80211_IFTYPE_WDS: 684 /* Create STA entry for the WDS peer */ 685 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 686 GFP_KERNEL); 687 if (!sta) { 688 res = -ENOMEM; 689 goto err_del_interface; 690 } 691 692 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 693 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 694 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 695 696 res = sta_info_insert(sta); 697 if (res) { 698 /* STA has been freed */ 699 goto err_del_interface; 700 } 701 702 rate_control_rate_init(sta); 703 netif_carrier_on(dev); 704 break; 705 case NL80211_IFTYPE_P2P_DEVICE: 706 rcu_assign_pointer(local->p2p_sdata, sdata); 707 break; 708 case NL80211_IFTYPE_MONITOR: 709 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 710 break; 711 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 712 break; 713 default: 714 break; 715 } 716 717 /* 718 * set_multicast_list will be invoked by the networking core 719 * which will check whether any increments here were done in 720 * error and sync them down to the hardware as filter flags. 721 */ 722 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 723 atomic_inc(&local->iff_allmultis); 724 725 if (coming_up) 726 local->open_count++; 727 728 if (hw_reconf_flags) 729 ieee80211_hw_config(local, hw_reconf_flags); 730 731 ieee80211_recalc_ps(local); 732 733 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 734 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 735 local->ops->wake_tx_queue) { 736 /* XXX: for AP_VLAN, actually track AP queues */ 737 if (dev) 738 netif_tx_start_all_queues(dev); 739 } else if (dev) { 740 unsigned long flags; 741 int n_acs = IEEE80211_NUM_ACS; 742 int ac; 743 744 if (local->hw.queues < IEEE80211_NUM_ACS) 745 n_acs = 1; 746 747 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 748 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 749 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 750 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 751 for (ac = 0; ac < n_acs; ac++) { 752 int ac_queue = sdata->vif.hw_queue[ac]; 753 754 if (local->queue_stop_reasons[ac_queue] == 0 && 755 skb_queue_empty(&local->pending[ac_queue])) 756 netif_start_subqueue(dev, ac); 757 } 758 } 759 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 760 } 761 762 return 0; 763 err_del_interface: 764 drv_remove_interface(local, sdata); 765 err_stop: 766 if (!local->open_count) 767 drv_stop(local); 768 err_del_bss: 769 sdata->bss = NULL; 770 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 771 mutex_lock(&local->mtx); 772 list_del(&sdata->u.vlan.list); 773 mutex_unlock(&local->mtx); 774 } 775 /* might already be clear but that doesn't matter */ 776 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 777 return res; 778 } 779 780 static int ieee80211_open(struct net_device *dev) 781 { 782 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 783 int err; 784 785 /* fail early if user set an invalid address */ 786 if (!is_valid_ether_addr(dev->dev_addr)) 787 return -EADDRNOTAVAIL; 788 789 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 790 if (err) 791 return err; 792 793 return ieee80211_do_open(&sdata->wdev, true); 794 } 795 796 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 797 bool going_down) 798 { 799 struct ieee80211_local *local = sdata->local; 800 unsigned long flags; 801 struct sk_buff *skb, *tmp; 802 u32 hw_reconf_flags = 0; 803 int i, flushed; 804 struct ps_data *ps; 805 struct cfg80211_chan_def chandef; 806 bool cancel_scan; 807 struct cfg80211_nan_func *func; 808 809 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 810 811 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 812 if (cancel_scan) 813 ieee80211_scan_cancel(local); 814 815 /* 816 * Stop TX on this interface first. 817 */ 818 if (sdata->dev) 819 netif_tx_stop_all_queues(sdata->dev); 820 821 ieee80211_roc_purge(local, sdata); 822 823 switch (sdata->vif.type) { 824 case NL80211_IFTYPE_STATION: 825 ieee80211_mgd_stop(sdata); 826 break; 827 case NL80211_IFTYPE_ADHOC: 828 ieee80211_ibss_stop(sdata); 829 break; 830 case NL80211_IFTYPE_AP: 831 cancel_work_sync(&sdata->u.ap.request_smps_work); 832 break; 833 case NL80211_IFTYPE_MONITOR: 834 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 835 break; 836 list_del_rcu(&sdata->u.mntr.list); 837 break; 838 default: 839 break; 840 } 841 842 /* 843 * Remove all stations associated with this interface. 844 * 845 * This must be done before calling ops->remove_interface() 846 * because otherwise we can later invoke ops->sta_notify() 847 * whenever the STAs are removed, and that invalidates driver 848 * assumptions about always getting a vif pointer that is valid 849 * (because if we remove a STA after ops->remove_interface() 850 * the driver will have removed the vif info already!) 851 * 852 * In WDS mode a station must exist here and be flushed, for 853 * AP_VLANs stations may exist since there's nothing else that 854 * would have removed them, but in other modes there shouldn't 855 * be any stations. 856 */ 857 flushed = sta_info_flush(sdata); 858 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 859 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 860 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 861 862 /* don't count this interface for allmulti while it is down */ 863 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 864 atomic_dec(&local->iff_allmultis); 865 866 if (sdata->vif.type == NL80211_IFTYPE_AP) { 867 local->fif_pspoll--; 868 local->fif_probe_req--; 869 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 870 local->fif_probe_req--; 871 } 872 873 if (sdata->dev) { 874 netif_addr_lock_bh(sdata->dev); 875 spin_lock_bh(&local->filter_lock); 876 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 877 sdata->dev->addr_len); 878 spin_unlock_bh(&local->filter_lock); 879 netif_addr_unlock_bh(sdata->dev); 880 } 881 882 del_timer_sync(&local->dynamic_ps_timer); 883 cancel_work_sync(&local->dynamic_ps_enable_work); 884 885 cancel_work_sync(&sdata->recalc_smps); 886 sdata_lock(sdata); 887 mutex_lock(&local->mtx); 888 sdata->vif.csa_active = false; 889 if (sdata->vif.type == NL80211_IFTYPE_STATION) 890 sdata->u.mgd.csa_waiting_bcn = false; 891 if (sdata->csa_block_tx) { 892 ieee80211_wake_vif_queues(local, sdata, 893 IEEE80211_QUEUE_STOP_REASON_CSA); 894 sdata->csa_block_tx = false; 895 } 896 mutex_unlock(&local->mtx); 897 sdata_unlock(sdata); 898 899 cancel_work_sync(&sdata->csa_finalize_work); 900 901 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 902 903 if (sdata->wdev.cac_started) { 904 chandef = sdata->vif.bss_conf.chandef; 905 WARN_ON(local->suspended); 906 mutex_lock(&local->mtx); 907 ieee80211_vif_release_channel(sdata); 908 mutex_unlock(&local->mtx); 909 cfg80211_cac_event(sdata->dev, &chandef, 910 NL80211_RADAR_CAC_ABORTED, 911 GFP_KERNEL); 912 } 913 914 /* APs need special treatment */ 915 if (sdata->vif.type == NL80211_IFTYPE_AP) { 916 struct ieee80211_sub_if_data *vlan, *tmpsdata; 917 918 /* down all dependent devices, that is VLANs */ 919 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 920 u.vlan.list) 921 dev_close(vlan->dev); 922 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 923 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 924 /* remove all packets in parent bc_buf pointing to this dev */ 925 ps = &sdata->bss->ps; 926 927 spin_lock_irqsave(&ps->bc_buf.lock, flags); 928 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 929 if (skb->dev == sdata->dev) { 930 __skb_unlink(skb, &ps->bc_buf); 931 local->total_ps_buffered--; 932 ieee80211_free_txskb(&local->hw, skb); 933 } 934 } 935 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 936 } 937 938 if (going_down) 939 local->open_count--; 940 941 switch (sdata->vif.type) { 942 case NL80211_IFTYPE_AP_VLAN: 943 mutex_lock(&local->mtx); 944 list_del(&sdata->u.vlan.list); 945 mutex_unlock(&local->mtx); 946 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 947 /* see comment in the default case below */ 948 ieee80211_free_keys(sdata, true); 949 /* no need to tell driver */ 950 break; 951 case NL80211_IFTYPE_MONITOR: 952 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 953 local->cooked_mntrs--; 954 break; 955 } 956 957 local->monitors--; 958 if (local->monitors == 0) { 959 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 960 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 961 } 962 963 ieee80211_adjust_monitor_flags(sdata, -1); 964 break; 965 case NL80211_IFTYPE_NAN: 966 /* clean all the functions */ 967 spin_lock_bh(&sdata->u.nan.func_lock); 968 969 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 970 idr_remove(&sdata->u.nan.function_inst_ids, i); 971 cfg80211_free_nan_func(func); 972 } 973 idr_destroy(&sdata->u.nan.function_inst_ids); 974 975 spin_unlock_bh(&sdata->u.nan.func_lock); 976 break; 977 case NL80211_IFTYPE_P2P_DEVICE: 978 /* relies on synchronize_rcu() below */ 979 RCU_INIT_POINTER(local->p2p_sdata, NULL); 980 /* fall through */ 981 default: 982 cancel_work_sync(&sdata->work); 983 /* 984 * When we get here, the interface is marked down. 985 * Free the remaining keys, if there are any 986 * (which can happen in AP mode if userspace sets 987 * keys before the interface is operating, and maybe 988 * also in WDS mode) 989 * 990 * Force the key freeing to always synchronize_net() 991 * to wait for the RX path in case it is using this 992 * interface enqueuing frames at this very time on 993 * another CPU. 994 */ 995 ieee80211_free_keys(sdata, true); 996 skb_queue_purge(&sdata->skb_queue); 997 } 998 999 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1000 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 1001 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 1002 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1003 if (info->control.vif == &sdata->vif) { 1004 __skb_unlink(skb, &local->pending[i]); 1005 ieee80211_free_txskb(&local->hw, skb); 1006 } 1007 } 1008 } 1009 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1010 1011 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1012 ieee80211_txq_remove_vlan(local, sdata); 1013 1014 sdata->bss = NULL; 1015 1016 if (local->open_count == 0) 1017 ieee80211_clear_tx_pending(local); 1018 1019 sdata->vif.bss_conf.beacon_int = 0; 1020 1021 /* 1022 * If the interface goes down while suspended, presumably because 1023 * the device was unplugged and that happens before our resume, 1024 * then the driver is already unconfigured and the remainder of 1025 * this function isn't needed. 1026 * XXX: what about WoWLAN? If the device has software state, e.g. 1027 * memory allocated, it might expect teardown commands from 1028 * mac80211 here? 1029 */ 1030 if (local->suspended) { 1031 WARN_ON(local->wowlan); 1032 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1033 return; 1034 } 1035 1036 switch (sdata->vif.type) { 1037 case NL80211_IFTYPE_AP_VLAN: 1038 break; 1039 case NL80211_IFTYPE_MONITOR: 1040 if (local->monitors == 0) 1041 ieee80211_del_virtual_monitor(local); 1042 1043 mutex_lock(&local->mtx); 1044 ieee80211_recalc_idle(local); 1045 mutex_unlock(&local->mtx); 1046 1047 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1048 break; 1049 1050 /* fall through */ 1051 default: 1052 if (going_down) 1053 drv_remove_interface(local, sdata); 1054 } 1055 1056 ieee80211_recalc_ps(local); 1057 1058 if (cancel_scan) 1059 flush_delayed_work(&local->scan_work); 1060 1061 if (local->open_count == 0) { 1062 ieee80211_stop_device(local); 1063 1064 /* no reconfiguring after stop! */ 1065 return; 1066 } 1067 1068 /* do after stop to avoid reconfiguring when we stop anyway */ 1069 ieee80211_configure_filter(local); 1070 ieee80211_hw_config(local, hw_reconf_flags); 1071 1072 if (local->monitors == local->open_count) 1073 ieee80211_add_virtual_monitor(local); 1074 } 1075 1076 static int ieee80211_stop(struct net_device *dev) 1077 { 1078 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1079 1080 ieee80211_do_stop(sdata, true); 1081 1082 return 0; 1083 } 1084 1085 static void ieee80211_set_multicast_list(struct net_device *dev) 1086 { 1087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1088 struct ieee80211_local *local = sdata->local; 1089 int allmulti, sdata_allmulti; 1090 1091 allmulti = !!(dev->flags & IFF_ALLMULTI); 1092 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1093 1094 if (allmulti != sdata_allmulti) { 1095 if (dev->flags & IFF_ALLMULTI) 1096 atomic_inc(&local->iff_allmultis); 1097 else 1098 atomic_dec(&local->iff_allmultis); 1099 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1100 } 1101 1102 spin_lock_bh(&local->filter_lock); 1103 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1104 spin_unlock_bh(&local->filter_lock); 1105 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1106 } 1107 1108 /* 1109 * Called when the netdev is removed or, by the code below, before 1110 * the interface type changes. 1111 */ 1112 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1113 { 1114 int i; 1115 1116 /* free extra data */ 1117 ieee80211_free_keys(sdata, false); 1118 1119 ieee80211_debugfs_remove_netdev(sdata); 1120 1121 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1122 __skb_queue_purge(&sdata->fragments[i].skb_list); 1123 sdata->fragment_next = 0; 1124 1125 if (ieee80211_vif_is_mesh(&sdata->vif)) 1126 ieee80211_mesh_teardown_sdata(sdata); 1127 } 1128 1129 static void ieee80211_uninit(struct net_device *dev) 1130 { 1131 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1132 } 1133 1134 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1135 struct sk_buff *skb, 1136 struct net_device *sb_dev) 1137 { 1138 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1139 } 1140 1141 static void 1142 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1143 { 1144 int i; 1145 1146 for_each_possible_cpu(i) { 1147 const struct pcpu_sw_netstats *tstats; 1148 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1149 unsigned int start; 1150 1151 tstats = per_cpu_ptr(dev->tstats, i); 1152 1153 do { 1154 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1155 rx_packets = tstats->rx_packets; 1156 tx_packets = tstats->tx_packets; 1157 rx_bytes = tstats->rx_bytes; 1158 tx_bytes = tstats->tx_bytes; 1159 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1160 1161 stats->rx_packets += rx_packets; 1162 stats->tx_packets += tx_packets; 1163 stats->rx_bytes += rx_bytes; 1164 stats->tx_bytes += tx_bytes; 1165 } 1166 } 1167 1168 static const struct net_device_ops ieee80211_dataif_ops = { 1169 .ndo_open = ieee80211_open, 1170 .ndo_stop = ieee80211_stop, 1171 .ndo_uninit = ieee80211_uninit, 1172 .ndo_start_xmit = ieee80211_subif_start_xmit, 1173 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1174 .ndo_set_mac_address = ieee80211_change_mac, 1175 .ndo_select_queue = ieee80211_netdev_select_queue, 1176 .ndo_get_stats64 = ieee80211_get_stats64, 1177 }; 1178 1179 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1180 struct sk_buff *skb, 1181 struct net_device *sb_dev) 1182 { 1183 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1184 struct ieee80211_local *local = sdata->local; 1185 struct ieee80211_hdr *hdr; 1186 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1187 1188 if (local->hw.queues < IEEE80211_NUM_ACS) 1189 return 0; 1190 1191 if (skb->len < 4 || 1192 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1193 return 0; /* doesn't matter, frame will be dropped */ 1194 1195 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1196 1197 return ieee80211_select_queue_80211(sdata, skb, hdr); 1198 } 1199 1200 static const struct net_device_ops ieee80211_monitorif_ops = { 1201 .ndo_open = ieee80211_open, 1202 .ndo_stop = ieee80211_stop, 1203 .ndo_uninit = ieee80211_uninit, 1204 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1205 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1206 .ndo_set_mac_address = ieee80211_change_mac, 1207 .ndo_select_queue = ieee80211_monitor_select_queue, 1208 .ndo_get_stats64 = ieee80211_get_stats64, 1209 }; 1210 1211 static void ieee80211_if_free(struct net_device *dev) 1212 { 1213 free_percpu(dev->tstats); 1214 } 1215 1216 static void ieee80211_if_setup(struct net_device *dev) 1217 { 1218 ether_setup(dev); 1219 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1220 dev->netdev_ops = &ieee80211_dataif_ops; 1221 dev->needs_free_netdev = true; 1222 dev->priv_destructor = ieee80211_if_free; 1223 } 1224 1225 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1226 { 1227 ieee80211_if_setup(dev); 1228 dev->features |= NETIF_F_LLTX; 1229 dev->priv_flags |= IFF_NO_QUEUE; 1230 } 1231 1232 static void ieee80211_iface_work(struct work_struct *work) 1233 { 1234 struct ieee80211_sub_if_data *sdata = 1235 container_of(work, struct ieee80211_sub_if_data, work); 1236 struct ieee80211_local *local = sdata->local; 1237 struct sk_buff *skb; 1238 struct sta_info *sta; 1239 1240 if (!ieee80211_sdata_running(sdata)) 1241 return; 1242 1243 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1244 return; 1245 1246 if (!ieee80211_can_run_worker(local)) 1247 return; 1248 1249 /* first process frames */ 1250 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1251 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1252 1253 if (ieee80211_is_action(mgmt->frame_control) && 1254 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1255 int len = skb->len; 1256 1257 mutex_lock(&local->sta_mtx); 1258 sta = sta_info_get_bss(sdata, mgmt->sa); 1259 if (sta) { 1260 switch (mgmt->u.action.u.addba_req.action_code) { 1261 case WLAN_ACTION_ADDBA_REQ: 1262 ieee80211_process_addba_request( 1263 local, sta, mgmt, len); 1264 break; 1265 case WLAN_ACTION_ADDBA_RESP: 1266 ieee80211_process_addba_resp(local, sta, 1267 mgmt, len); 1268 break; 1269 case WLAN_ACTION_DELBA: 1270 ieee80211_process_delba(sdata, sta, 1271 mgmt, len); 1272 break; 1273 default: 1274 WARN_ON(1); 1275 break; 1276 } 1277 } 1278 mutex_unlock(&local->sta_mtx); 1279 } else if (ieee80211_is_action(mgmt->frame_control) && 1280 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1281 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1282 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1283 struct ieee80211_rx_status *status; 1284 enum nl80211_band band; 1285 u8 opmode; 1286 1287 status = IEEE80211_SKB_RXCB(skb); 1288 band = status->band; 1289 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1290 1291 mutex_lock(&local->sta_mtx); 1292 sta = sta_info_get_bss(sdata, mgmt->sa); 1293 1294 if (sta) 1295 ieee80211_vht_handle_opmode(sdata, sta, 1296 opmode, 1297 band); 1298 1299 mutex_unlock(&local->sta_mtx); 1300 break; 1301 } 1302 case WLAN_VHT_ACTION_GROUPID_MGMT: 1303 ieee80211_process_mu_groups(sdata, mgmt); 1304 break; 1305 default: 1306 WARN_ON(1); 1307 break; 1308 } 1309 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1310 struct ieee80211_hdr *hdr = (void *)mgmt; 1311 /* 1312 * So the frame isn't mgmt, but frame_control 1313 * is at the right place anyway, of course, so 1314 * the if statement is correct. 1315 * 1316 * Warn if we have other data frame types here, 1317 * they must not get here. 1318 */ 1319 WARN_ON(hdr->frame_control & 1320 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1321 WARN_ON(!(hdr->seq_ctrl & 1322 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1323 /* 1324 * This was a fragment of a frame, received while 1325 * a block-ack session was active. That cannot be 1326 * right, so terminate the session. 1327 */ 1328 mutex_lock(&local->sta_mtx); 1329 sta = sta_info_get_bss(sdata, mgmt->sa); 1330 if (sta) { 1331 u16 tid = ieee80211_get_tid(hdr); 1332 1333 __ieee80211_stop_rx_ba_session( 1334 sta, tid, WLAN_BACK_RECIPIENT, 1335 WLAN_REASON_QSTA_REQUIRE_SETUP, 1336 true); 1337 } 1338 mutex_unlock(&local->sta_mtx); 1339 } else switch (sdata->vif.type) { 1340 case NL80211_IFTYPE_STATION: 1341 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1342 break; 1343 case NL80211_IFTYPE_ADHOC: 1344 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1345 break; 1346 case NL80211_IFTYPE_MESH_POINT: 1347 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1348 break; 1349 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1350 break; 1351 default: 1352 WARN(1, "frame for unexpected interface type"); 1353 break; 1354 } 1355 1356 kfree_skb(skb); 1357 } 1358 1359 /* then other type-dependent work */ 1360 switch (sdata->vif.type) { 1361 case NL80211_IFTYPE_STATION: 1362 ieee80211_sta_work(sdata); 1363 break; 1364 case NL80211_IFTYPE_ADHOC: 1365 ieee80211_ibss_work(sdata); 1366 break; 1367 case NL80211_IFTYPE_MESH_POINT: 1368 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1369 break; 1370 ieee80211_mesh_work(sdata); 1371 break; 1372 case NL80211_IFTYPE_OCB: 1373 ieee80211_ocb_work(sdata); 1374 break; 1375 default: 1376 break; 1377 } 1378 } 1379 1380 static void ieee80211_recalc_smps_work(struct work_struct *work) 1381 { 1382 struct ieee80211_sub_if_data *sdata = 1383 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1384 1385 ieee80211_recalc_smps(sdata); 1386 } 1387 1388 /* 1389 * Helper function to initialise an interface to a specific type. 1390 */ 1391 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1392 enum nl80211_iftype type) 1393 { 1394 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1395 0xff, 0xff, 0xff}; 1396 1397 /* clear type-dependent union */ 1398 memset(&sdata->u, 0, sizeof(sdata->u)); 1399 1400 /* and set some type-dependent values */ 1401 sdata->vif.type = type; 1402 sdata->vif.p2p = false; 1403 sdata->wdev.iftype = type; 1404 1405 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1406 sdata->control_port_no_encrypt = false; 1407 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1408 sdata->vif.bss_conf.idle = true; 1409 1410 sdata->noack_map = 0; 1411 1412 /* only monitor/p2p-device differ */ 1413 if (sdata->dev) { 1414 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1415 sdata->dev->type = ARPHRD_ETHER; 1416 } 1417 1418 skb_queue_head_init(&sdata->skb_queue); 1419 INIT_WORK(&sdata->work, ieee80211_iface_work); 1420 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1421 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1422 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1423 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1424 1425 switch (type) { 1426 case NL80211_IFTYPE_P2P_GO: 1427 type = NL80211_IFTYPE_AP; 1428 sdata->vif.type = type; 1429 sdata->vif.p2p = true; 1430 /* fall through */ 1431 case NL80211_IFTYPE_AP: 1432 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1433 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1434 INIT_WORK(&sdata->u.ap.request_smps_work, 1435 ieee80211_request_smps_ap_work); 1436 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1437 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; 1438 break; 1439 case NL80211_IFTYPE_P2P_CLIENT: 1440 type = NL80211_IFTYPE_STATION; 1441 sdata->vif.type = type; 1442 sdata->vif.p2p = true; 1443 /* fall through */ 1444 case NL80211_IFTYPE_STATION: 1445 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1446 ieee80211_sta_setup_sdata(sdata); 1447 break; 1448 case NL80211_IFTYPE_OCB: 1449 sdata->vif.bss_conf.bssid = bssid_wildcard; 1450 ieee80211_ocb_setup_sdata(sdata); 1451 break; 1452 case NL80211_IFTYPE_ADHOC: 1453 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1454 ieee80211_ibss_setup_sdata(sdata); 1455 break; 1456 case NL80211_IFTYPE_MESH_POINT: 1457 if (ieee80211_vif_is_mesh(&sdata->vif)) 1458 ieee80211_mesh_init_sdata(sdata); 1459 break; 1460 case NL80211_IFTYPE_MONITOR: 1461 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1462 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1463 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1464 MONITOR_FLAG_OTHER_BSS; 1465 break; 1466 case NL80211_IFTYPE_WDS: 1467 sdata->vif.bss_conf.bssid = NULL; 1468 break; 1469 case NL80211_IFTYPE_NAN: 1470 idr_init(&sdata->u.nan.function_inst_ids); 1471 spin_lock_init(&sdata->u.nan.func_lock); 1472 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1473 break; 1474 case NL80211_IFTYPE_AP_VLAN: 1475 case NL80211_IFTYPE_P2P_DEVICE: 1476 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1477 break; 1478 case NL80211_IFTYPE_UNSPECIFIED: 1479 case NUM_NL80211_IFTYPES: 1480 WARN_ON(1); 1481 break; 1482 } 1483 1484 ieee80211_debugfs_add_netdev(sdata); 1485 } 1486 1487 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1488 enum nl80211_iftype type) 1489 { 1490 struct ieee80211_local *local = sdata->local; 1491 int ret, err; 1492 enum nl80211_iftype internal_type = type; 1493 bool p2p = false; 1494 1495 ASSERT_RTNL(); 1496 1497 if (!local->ops->change_interface) 1498 return -EBUSY; 1499 1500 switch (sdata->vif.type) { 1501 case NL80211_IFTYPE_AP: 1502 case NL80211_IFTYPE_STATION: 1503 case NL80211_IFTYPE_ADHOC: 1504 case NL80211_IFTYPE_OCB: 1505 /* 1506 * Could maybe also all others here? 1507 * Just not sure how that interacts 1508 * with the RX/config path e.g. for 1509 * mesh. 1510 */ 1511 break; 1512 default: 1513 return -EBUSY; 1514 } 1515 1516 switch (type) { 1517 case NL80211_IFTYPE_AP: 1518 case NL80211_IFTYPE_STATION: 1519 case NL80211_IFTYPE_ADHOC: 1520 case NL80211_IFTYPE_OCB: 1521 /* 1522 * Could probably support everything 1523 * but WDS here (WDS do_open can fail 1524 * under memory pressure, which this 1525 * code isn't prepared to handle). 1526 */ 1527 break; 1528 case NL80211_IFTYPE_P2P_CLIENT: 1529 p2p = true; 1530 internal_type = NL80211_IFTYPE_STATION; 1531 break; 1532 case NL80211_IFTYPE_P2P_GO: 1533 p2p = true; 1534 internal_type = NL80211_IFTYPE_AP; 1535 break; 1536 default: 1537 return -EBUSY; 1538 } 1539 1540 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1541 if (ret) 1542 return ret; 1543 1544 ieee80211_do_stop(sdata, false); 1545 1546 ieee80211_teardown_sdata(sdata); 1547 1548 ret = drv_change_interface(local, sdata, internal_type, p2p); 1549 if (ret) 1550 type = ieee80211_vif_type_p2p(&sdata->vif); 1551 1552 /* 1553 * Ignore return value here, there's not much we can do since 1554 * the driver changed the interface type internally already. 1555 * The warnings will hopefully make driver authors fix it :-) 1556 */ 1557 ieee80211_check_queues(sdata, type); 1558 1559 ieee80211_setup_sdata(sdata, type); 1560 1561 err = ieee80211_do_open(&sdata->wdev, false); 1562 WARN(err, "type change: do_open returned %d", err); 1563 1564 return ret; 1565 } 1566 1567 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1568 enum nl80211_iftype type) 1569 { 1570 int ret; 1571 1572 ASSERT_RTNL(); 1573 1574 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1575 return 0; 1576 1577 if (ieee80211_sdata_running(sdata)) { 1578 ret = ieee80211_runtime_change_iftype(sdata, type); 1579 if (ret) 1580 return ret; 1581 } else { 1582 /* Purge and reset type-dependent state. */ 1583 ieee80211_teardown_sdata(sdata); 1584 ieee80211_setup_sdata(sdata, type); 1585 } 1586 1587 /* reset some values that shouldn't be kept across type changes */ 1588 if (type == NL80211_IFTYPE_STATION) 1589 sdata->u.mgd.use_4addr = false; 1590 1591 return 0; 1592 } 1593 1594 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1595 u8 *perm_addr, enum nl80211_iftype type) 1596 { 1597 struct ieee80211_sub_if_data *sdata; 1598 u64 mask, start, addr, val, inc; 1599 u8 *m; 1600 u8 tmp_addr[ETH_ALEN]; 1601 int i; 1602 1603 /* default ... something at least */ 1604 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1605 1606 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1607 local->hw.wiphy->n_addresses <= 1) 1608 return; 1609 1610 mutex_lock(&local->iflist_mtx); 1611 1612 switch (type) { 1613 case NL80211_IFTYPE_MONITOR: 1614 /* doesn't matter */ 1615 break; 1616 case NL80211_IFTYPE_WDS: 1617 case NL80211_IFTYPE_AP_VLAN: 1618 /* match up with an AP interface */ 1619 list_for_each_entry(sdata, &local->interfaces, list) { 1620 if (sdata->vif.type != NL80211_IFTYPE_AP) 1621 continue; 1622 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1623 break; 1624 } 1625 /* keep default if no AP interface present */ 1626 break; 1627 case NL80211_IFTYPE_P2P_CLIENT: 1628 case NL80211_IFTYPE_P2P_GO: 1629 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1630 list_for_each_entry(sdata, &local->interfaces, list) { 1631 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1632 continue; 1633 if (!ieee80211_sdata_running(sdata)) 1634 continue; 1635 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1636 goto out_unlock; 1637 } 1638 } 1639 /* fall through */ 1640 default: 1641 /* assign a new address if possible -- try n_addresses first */ 1642 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1643 bool used = false; 1644 1645 list_for_each_entry(sdata, &local->interfaces, list) { 1646 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1647 sdata->vif.addr)) { 1648 used = true; 1649 break; 1650 } 1651 } 1652 1653 if (!used) { 1654 memcpy(perm_addr, 1655 local->hw.wiphy->addresses[i].addr, 1656 ETH_ALEN); 1657 break; 1658 } 1659 } 1660 1661 /* try mask if available */ 1662 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1663 break; 1664 1665 m = local->hw.wiphy->addr_mask; 1666 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1667 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1668 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1669 1670 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1671 /* not a contiguous mask ... not handled now! */ 1672 pr_info("not contiguous\n"); 1673 break; 1674 } 1675 1676 /* 1677 * Pick address of existing interface in case user changed 1678 * MAC address manually, default to perm_addr. 1679 */ 1680 m = local->hw.wiphy->perm_addr; 1681 list_for_each_entry(sdata, &local->interfaces, list) { 1682 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1683 continue; 1684 m = sdata->vif.addr; 1685 break; 1686 } 1687 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1688 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1689 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1690 1691 inc = 1ULL<<__ffs64(mask); 1692 val = (start & mask); 1693 addr = (start & ~mask) | (val & mask); 1694 do { 1695 bool used = false; 1696 1697 tmp_addr[5] = addr >> 0*8; 1698 tmp_addr[4] = addr >> 1*8; 1699 tmp_addr[3] = addr >> 2*8; 1700 tmp_addr[2] = addr >> 3*8; 1701 tmp_addr[1] = addr >> 4*8; 1702 tmp_addr[0] = addr >> 5*8; 1703 1704 val += inc; 1705 1706 list_for_each_entry(sdata, &local->interfaces, list) { 1707 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1708 used = true; 1709 break; 1710 } 1711 } 1712 1713 if (!used) { 1714 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1715 break; 1716 } 1717 addr = (start & ~mask) | (val & mask); 1718 } while (addr != start); 1719 1720 break; 1721 } 1722 1723 out_unlock: 1724 mutex_unlock(&local->iflist_mtx); 1725 } 1726 1727 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1728 unsigned char name_assign_type, 1729 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1730 struct vif_params *params) 1731 { 1732 struct net_device *ndev = NULL; 1733 struct ieee80211_sub_if_data *sdata = NULL; 1734 struct txq_info *txqi; 1735 void (*if_setup)(struct net_device *dev); 1736 int ret, i; 1737 int txqs = 1; 1738 1739 ASSERT_RTNL(); 1740 1741 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1742 struct wireless_dev *wdev; 1743 1744 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1745 GFP_KERNEL); 1746 if (!sdata) 1747 return -ENOMEM; 1748 wdev = &sdata->wdev; 1749 1750 sdata->dev = NULL; 1751 strlcpy(sdata->name, name, IFNAMSIZ); 1752 ieee80211_assign_perm_addr(local, wdev->address, type); 1753 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1754 } else { 1755 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1756 sizeof(void *)); 1757 int txq_size = 0; 1758 1759 if (local->ops->wake_tx_queue && 1760 type != NL80211_IFTYPE_AP_VLAN && 1761 (type != NL80211_IFTYPE_MONITOR || 1762 (params->flags & MONITOR_FLAG_ACTIVE))) 1763 txq_size += sizeof(struct txq_info) + 1764 local->hw.txq_data_size; 1765 1766 if (local->ops->wake_tx_queue) { 1767 if_setup = ieee80211_if_setup_no_queue; 1768 } else { 1769 if_setup = ieee80211_if_setup; 1770 if (local->hw.queues >= IEEE80211_NUM_ACS) 1771 txqs = IEEE80211_NUM_ACS; 1772 } 1773 1774 ndev = alloc_netdev_mqs(size + txq_size, 1775 name, name_assign_type, 1776 if_setup, txqs, 1); 1777 if (!ndev) 1778 return -ENOMEM; 1779 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1780 1781 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1782 if (!ndev->tstats) { 1783 free_netdev(ndev); 1784 return -ENOMEM; 1785 } 1786 1787 ndev->needed_headroom = local->tx_headroom + 1788 4*6 /* four MAC addresses */ 1789 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1790 + 6 /* mesh */ 1791 + 8 /* rfc1042/bridge tunnel */ 1792 - ETH_HLEN /* ethernet hard_header_len */ 1793 + IEEE80211_ENCRYPT_HEADROOM; 1794 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1795 1796 ret = dev_alloc_name(ndev, ndev->name); 1797 if (ret < 0) { 1798 ieee80211_if_free(ndev); 1799 free_netdev(ndev); 1800 return ret; 1801 } 1802 1803 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1804 if (is_valid_ether_addr(params->macaddr)) 1805 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1806 else 1807 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1808 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1809 1810 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1811 sdata = netdev_priv(ndev); 1812 ndev->ieee80211_ptr = &sdata->wdev; 1813 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1814 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1815 1816 if (txq_size) { 1817 txqi = netdev_priv(ndev) + size; 1818 ieee80211_txq_init(sdata, NULL, txqi, 0); 1819 } 1820 1821 sdata->dev = ndev; 1822 } 1823 1824 /* initialise type-independent data */ 1825 sdata->wdev.wiphy = local->hw.wiphy; 1826 sdata->local = local; 1827 1828 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1829 skb_queue_head_init(&sdata->fragments[i].skb_list); 1830 1831 INIT_LIST_HEAD(&sdata->key_list); 1832 1833 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1834 ieee80211_dfs_cac_timer_work); 1835 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1836 ieee80211_delayed_tailroom_dec); 1837 1838 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1839 struct ieee80211_supported_band *sband; 1840 sband = local->hw.wiphy->bands[i]; 1841 sdata->rc_rateidx_mask[i] = 1842 sband ? (1 << sband->n_bitrates) - 1 : 0; 1843 if (sband) { 1844 __le16 cap; 1845 u16 *vht_rate_mask; 1846 1847 memcpy(sdata->rc_rateidx_mcs_mask[i], 1848 sband->ht_cap.mcs.rx_mask, 1849 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1850 1851 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1852 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1853 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1854 } else { 1855 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1856 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1857 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1858 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1859 } 1860 } 1861 1862 ieee80211_set_default_queues(sdata); 1863 1864 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1865 sdata->user_power_level = local->user_power_level; 1866 1867 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1868 1869 /* setup type-dependent data */ 1870 ieee80211_setup_sdata(sdata, type); 1871 1872 if (ndev) { 1873 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1874 if (type == NL80211_IFTYPE_STATION) 1875 sdata->u.mgd.use_4addr = params->use_4addr; 1876 1877 ndev->features |= local->hw.netdev_features; 1878 1879 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1880 1881 /* MTU range: 256 - 2304 */ 1882 ndev->min_mtu = 256; 1883 ndev->max_mtu = IEEE80211_MAX_DATA_LEN; 1884 1885 ret = register_netdevice(ndev); 1886 if (ret) { 1887 free_netdev(ndev); 1888 return ret; 1889 } 1890 } 1891 1892 mutex_lock(&local->iflist_mtx); 1893 list_add_tail_rcu(&sdata->list, &local->interfaces); 1894 mutex_unlock(&local->iflist_mtx); 1895 1896 if (new_wdev) 1897 *new_wdev = &sdata->wdev; 1898 1899 return 0; 1900 } 1901 1902 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1903 { 1904 ASSERT_RTNL(); 1905 1906 mutex_lock(&sdata->local->iflist_mtx); 1907 list_del_rcu(&sdata->list); 1908 mutex_unlock(&sdata->local->iflist_mtx); 1909 1910 if (sdata->vif.txq) 1911 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 1912 1913 synchronize_rcu(); 1914 1915 if (sdata->dev) { 1916 unregister_netdevice(sdata->dev); 1917 } else { 1918 cfg80211_unregister_wdev(&sdata->wdev); 1919 ieee80211_teardown_sdata(sdata); 1920 kfree(sdata); 1921 } 1922 } 1923 1924 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1925 { 1926 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1927 return; 1928 ieee80211_do_stop(sdata, true); 1929 } 1930 1931 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1932 { 1933 struct ieee80211_sub_if_data *sdata, *tmp; 1934 LIST_HEAD(unreg_list); 1935 LIST_HEAD(wdev_list); 1936 1937 ASSERT_RTNL(); 1938 1939 /* Before destroying the interfaces, make sure they're all stopped so 1940 * that the hardware is stopped. Otherwise, the driver might still be 1941 * iterating the interfaces during the shutdown, e.g. from a worker 1942 * or from RX processing or similar, and if it does so (using atomic 1943 * iteration) while we're manipulating the list, the iteration will 1944 * crash. 1945 * 1946 * After this, the hardware should be stopped and the driver should 1947 * have stopped all of its activities, so that we can do RCU-unaware 1948 * manipulations of the interface list below. 1949 */ 1950 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1951 1952 WARN(local->open_count, "%s: open count remains %d\n", 1953 wiphy_name(local->hw.wiphy), local->open_count); 1954 1955 ieee80211_txq_teardown_flows(local); 1956 1957 mutex_lock(&local->iflist_mtx); 1958 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1959 list_del(&sdata->list); 1960 1961 if (sdata->dev) 1962 unregister_netdevice_queue(sdata->dev, &unreg_list); 1963 else 1964 list_add(&sdata->list, &wdev_list); 1965 } 1966 mutex_unlock(&local->iflist_mtx); 1967 unregister_netdevice_many(&unreg_list); 1968 1969 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 1970 list_del(&sdata->list); 1971 cfg80211_unregister_wdev(&sdata->wdev); 1972 kfree(sdata); 1973 } 1974 } 1975 1976 static int netdev_notify(struct notifier_block *nb, 1977 unsigned long state, void *ptr) 1978 { 1979 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1980 struct ieee80211_sub_if_data *sdata; 1981 1982 if (state != NETDEV_CHANGENAME) 1983 return NOTIFY_DONE; 1984 1985 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1986 return NOTIFY_DONE; 1987 1988 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1989 return NOTIFY_DONE; 1990 1991 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1992 memcpy(sdata->name, dev->name, IFNAMSIZ); 1993 ieee80211_debugfs_rename_netdev(sdata); 1994 1995 return NOTIFY_OK; 1996 } 1997 1998 static struct notifier_block mac80211_netdev_notifier = { 1999 .notifier_call = netdev_notify, 2000 }; 2001 2002 int ieee80211_iface_init(void) 2003 { 2004 return register_netdevice_notifier(&mac80211_netdev_notifier); 2005 } 2006 2007 void ieee80211_iface_exit(void) 2008 { 2009 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2010 } 2011 2012 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2013 { 2014 if (sdata->vif.type == NL80211_IFTYPE_AP) 2015 atomic_inc(&sdata->u.ap.num_mcast_sta); 2016 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2017 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2018 } 2019 2020 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2021 { 2022 if (sdata->vif.type == NL80211_IFTYPE_AP) 2023 atomic_dec(&sdata->u.ap.num_mcast_sta); 2024 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2025 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2026 } 2027