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 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 #include <linux/slab.h> 16 #include <linux/kernel.h> 17 #include <linux/if_arp.h> 18 #include <linux/netdevice.h> 19 #include <linux/rtnetlink.h> 20 #include <net/mac80211.h> 21 #include <net/ieee80211_radiotap.h> 22 #include "ieee80211_i.h" 23 #include "sta_info.h" 24 #include "debugfs_netdev.h" 25 #include "mesh.h" 26 #include "led.h" 27 #include "driver-ops.h" 28 #include "wme.h" 29 #include "rate.h" 30 31 /** 32 * DOC: Interface list locking 33 * 34 * The interface list in each struct ieee80211_local is protected 35 * three-fold: 36 * 37 * (1) modifications may only be done under the RTNL 38 * (2) modifications and readers are protected against each other by 39 * the iflist_mtx. 40 * (3) modifications are done in an RCU manner so atomic readers 41 * can traverse the list in RCU-safe blocks. 42 * 43 * As a consequence, reads (traversals) of the list can be protected 44 * by either the RTNL, the iflist_mtx or RCU. 45 */ 46 47 static void ieee80211_iface_work(struct work_struct *work); 48 49 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 50 { 51 struct ieee80211_chanctx_conf *chanctx_conf; 52 int power; 53 54 rcu_read_lock(); 55 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 56 if (!chanctx_conf) { 57 rcu_read_unlock(); 58 return false; 59 } 60 61 power = ieee80211_chandef_max_power(&chanctx_conf->def); 62 rcu_read_unlock(); 63 64 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 65 power = min(power, sdata->user_power_level); 66 67 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 68 power = min(power, sdata->ap_power_level); 69 70 if (power != sdata->vif.bss_conf.txpower) { 71 sdata->vif.bss_conf.txpower = power; 72 ieee80211_hw_config(sdata->local, 0); 73 return true; 74 } 75 76 return false; 77 } 78 79 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 80 bool update_bss) 81 { 82 if (__ieee80211_recalc_txpower(sdata) || 83 (update_bss && ieee80211_sdata_running(sdata))) 84 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 85 } 86 87 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 88 { 89 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 90 return 0; 91 92 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 93 return IEEE80211_CONF_CHANGE_IDLE; 94 } 95 96 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 97 { 98 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 99 return 0; 100 101 ieee80211_flush_queues(local, NULL, false); 102 103 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 104 return IEEE80211_CONF_CHANGE_IDLE; 105 } 106 107 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 108 bool force_active) 109 { 110 bool working, scanning, active; 111 unsigned int led_trig_start = 0, led_trig_stop = 0; 112 113 lockdep_assert_held(&local->mtx); 114 115 active = force_active || 116 !list_empty(&local->chanctx_list) || 117 local->monitors; 118 119 working = !local->ops->remain_on_channel && 120 !list_empty(&local->roc_list); 121 122 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 123 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 124 125 if (working || scanning) 126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 127 else 128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 129 130 if (active) 131 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 132 else 133 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 134 135 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 136 137 if (working || scanning || active) 138 return __ieee80211_idle_off(local); 139 return __ieee80211_idle_on(local); 140 } 141 142 u32 ieee80211_idle_off(struct ieee80211_local *local) 143 { 144 return __ieee80211_recalc_idle(local, true); 145 } 146 147 void ieee80211_recalc_idle(struct ieee80211_local *local) 148 { 149 u32 change = __ieee80211_recalc_idle(local, false); 150 if (change) 151 ieee80211_hw_config(local, change); 152 } 153 154 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 155 bool check_dup) 156 { 157 struct ieee80211_local *local = sdata->local; 158 struct ieee80211_sub_if_data *iter; 159 u64 new, mask, tmp; 160 u8 *m; 161 int ret = 0; 162 163 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 164 return 0; 165 166 m = addr; 167 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 170 171 m = local->hw.wiphy->addr_mask; 172 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 175 176 if (!check_dup) 177 return ret; 178 179 mutex_lock(&local->iflist_mtx); 180 list_for_each_entry(iter, &local->interfaces, list) { 181 if (iter == sdata) 182 continue; 183 184 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 185 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 186 continue; 187 188 m = iter->vif.addr; 189 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 190 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 191 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 192 193 if ((new & ~mask) != (tmp & ~mask)) { 194 ret = -EINVAL; 195 break; 196 } 197 } 198 mutex_unlock(&local->iflist_mtx); 199 200 return ret; 201 } 202 203 static int ieee80211_change_mac(struct net_device *dev, void *addr) 204 { 205 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 206 struct sockaddr *sa = addr; 207 bool check_dup = true; 208 int ret; 209 210 if (ieee80211_sdata_running(sdata)) 211 return -EBUSY; 212 213 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 214 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 215 check_dup = false; 216 217 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 218 if (ret) 219 return ret; 220 221 ret = eth_mac_addr(dev, sa); 222 223 if (ret == 0) 224 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 225 226 return ret; 227 } 228 229 static inline int identical_mac_addr_allowed(int type1, int type2) 230 { 231 return type1 == NL80211_IFTYPE_MONITOR || 232 type2 == NL80211_IFTYPE_MONITOR || 233 type1 == NL80211_IFTYPE_P2P_DEVICE || 234 type2 == NL80211_IFTYPE_P2P_DEVICE || 235 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 236 (type1 == NL80211_IFTYPE_WDS && 237 (type2 == NL80211_IFTYPE_WDS || 238 type2 == NL80211_IFTYPE_AP)) || 239 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 240 (type1 == NL80211_IFTYPE_AP_VLAN && 241 (type2 == NL80211_IFTYPE_AP || 242 type2 == NL80211_IFTYPE_AP_VLAN)); 243 } 244 245 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 246 enum nl80211_iftype iftype) 247 { 248 struct ieee80211_local *local = sdata->local; 249 struct ieee80211_sub_if_data *nsdata; 250 int ret; 251 252 ASSERT_RTNL(); 253 254 /* we hold the RTNL here so can safely walk the list */ 255 list_for_each_entry(nsdata, &local->interfaces, list) { 256 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 257 /* 258 * Only OCB and monitor mode may coexist 259 */ 260 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 261 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 262 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 263 nsdata->vif.type == NL80211_IFTYPE_OCB)) 264 return -EBUSY; 265 266 /* 267 * Allow only a single IBSS interface to be up at any 268 * time. This is restricted because beacon distribution 269 * cannot work properly if both are in the same IBSS. 270 * 271 * To remove this restriction we'd have to disallow them 272 * from setting the same SSID on different IBSS interfaces 273 * belonging to the same hardware. Then, however, we're 274 * faced with having to adopt two different TSF timers... 275 */ 276 if (iftype == NL80211_IFTYPE_ADHOC && 277 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 278 return -EBUSY; 279 /* 280 * will not add another interface while any channel 281 * switch is active. 282 */ 283 if (nsdata->vif.csa_active) 284 return -EBUSY; 285 286 /* 287 * The remaining checks are only performed for interfaces 288 * with the same MAC address. 289 */ 290 if (!ether_addr_equal(sdata->vif.addr, 291 nsdata->vif.addr)) 292 continue; 293 294 /* 295 * check whether it may have the same address 296 */ 297 if (!identical_mac_addr_allowed(iftype, 298 nsdata->vif.type)) 299 return -ENOTUNIQ; 300 301 /* 302 * can only add VLANs to enabled APs 303 */ 304 if (iftype == NL80211_IFTYPE_AP_VLAN && 305 nsdata->vif.type == NL80211_IFTYPE_AP) 306 sdata->bss = &nsdata->u.ap; 307 } 308 } 309 310 mutex_lock(&local->chanctx_mtx); 311 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 312 mutex_unlock(&local->chanctx_mtx); 313 return ret; 314 } 315 316 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 317 enum nl80211_iftype iftype) 318 { 319 int n_queues = sdata->local->hw.queues; 320 int i; 321 322 if (iftype == NL80211_IFTYPE_NAN) 323 return 0; 324 325 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 326 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 327 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 328 IEEE80211_INVAL_HW_QUEUE)) 329 return -EINVAL; 330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 331 n_queues)) 332 return -EINVAL; 333 } 334 } 335 336 if ((iftype != NL80211_IFTYPE_AP && 337 iftype != NL80211_IFTYPE_P2P_GO && 338 iftype != NL80211_IFTYPE_MESH_POINT) || 339 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 340 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 341 return 0; 342 } 343 344 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 345 return -EINVAL; 346 347 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 348 return -EINVAL; 349 350 return 0; 351 } 352 353 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 354 const int offset) 355 { 356 struct ieee80211_local *local = sdata->local; 357 u32 flags = sdata->u.mntr.flags; 358 359 #define ADJUST(_f, _s) do { \ 360 if (flags & MONITOR_FLAG_##_f) \ 361 local->fif_##_s += offset; \ 362 } while (0) 363 364 ADJUST(FCSFAIL, fcsfail); 365 ADJUST(PLCPFAIL, plcpfail); 366 ADJUST(CONTROL, control); 367 ADJUST(CONTROL, pspoll); 368 ADJUST(OTHER_BSS, other_bss); 369 370 #undef ADJUST 371 } 372 373 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 374 { 375 struct ieee80211_local *local = sdata->local; 376 int i; 377 378 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 379 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 380 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 381 else if (local->hw.queues >= IEEE80211_NUM_ACS) 382 sdata->vif.hw_queue[i] = i; 383 else 384 sdata->vif.hw_queue[i] = 0; 385 } 386 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 387 } 388 389 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 390 { 391 struct ieee80211_sub_if_data *sdata; 392 int ret; 393 394 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 395 return 0; 396 397 ASSERT_RTNL(); 398 399 if (local->monitor_sdata) 400 return 0; 401 402 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 403 if (!sdata) 404 return -ENOMEM; 405 406 /* set up data */ 407 sdata->local = local; 408 sdata->vif.type = NL80211_IFTYPE_MONITOR; 409 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 410 wiphy_name(local->hw.wiphy)); 411 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 412 413 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 414 415 ieee80211_set_default_queues(sdata); 416 417 ret = drv_add_interface(local, sdata); 418 if (WARN_ON(ret)) { 419 /* ok .. stupid driver, it asked for this! */ 420 kfree(sdata); 421 return ret; 422 } 423 424 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 425 if (ret) { 426 kfree(sdata); 427 return ret; 428 } 429 430 mutex_lock(&local->iflist_mtx); 431 rcu_assign_pointer(local->monitor_sdata, sdata); 432 mutex_unlock(&local->iflist_mtx); 433 434 mutex_lock(&local->mtx); 435 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 436 IEEE80211_CHANCTX_EXCLUSIVE); 437 mutex_unlock(&local->mtx); 438 if (ret) { 439 mutex_lock(&local->iflist_mtx); 440 RCU_INIT_POINTER(local->monitor_sdata, NULL); 441 mutex_unlock(&local->iflist_mtx); 442 synchronize_net(); 443 drv_remove_interface(local, sdata); 444 kfree(sdata); 445 return ret; 446 } 447 448 skb_queue_head_init(&sdata->skb_queue); 449 INIT_WORK(&sdata->work, ieee80211_iface_work); 450 451 return 0; 452 } 453 454 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 455 { 456 struct ieee80211_sub_if_data *sdata; 457 458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 459 return; 460 461 ASSERT_RTNL(); 462 463 mutex_lock(&local->iflist_mtx); 464 465 sdata = rcu_dereference_protected(local->monitor_sdata, 466 lockdep_is_held(&local->iflist_mtx)); 467 if (!sdata) { 468 mutex_unlock(&local->iflist_mtx); 469 return; 470 } 471 472 RCU_INIT_POINTER(local->monitor_sdata, NULL); 473 mutex_unlock(&local->iflist_mtx); 474 475 synchronize_net(); 476 477 mutex_lock(&local->mtx); 478 ieee80211_vif_release_channel(sdata); 479 mutex_unlock(&local->mtx); 480 481 drv_remove_interface(local, sdata); 482 483 kfree(sdata); 484 } 485 486 /* 487 * NOTE: Be very careful when changing this function, it must NOT return 488 * an error on interface type changes that have been pre-checked, so most 489 * checks should be in ieee80211_check_concurrent_iface. 490 */ 491 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 492 { 493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 494 struct net_device *dev = wdev->netdev; 495 struct ieee80211_local *local = sdata->local; 496 struct sta_info *sta; 497 u32 changed = 0; 498 int res; 499 u32 hw_reconf_flags = 0; 500 501 switch (sdata->vif.type) { 502 case NL80211_IFTYPE_WDS: 503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 504 return -ENOLINK; 505 break; 506 case NL80211_IFTYPE_AP_VLAN: { 507 struct ieee80211_sub_if_data *master; 508 509 if (!sdata->bss) 510 return -ENOLINK; 511 512 mutex_lock(&local->mtx); 513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 514 mutex_unlock(&local->mtx); 515 516 master = container_of(sdata->bss, 517 struct ieee80211_sub_if_data, u.ap); 518 sdata->control_port_protocol = 519 master->control_port_protocol; 520 sdata->control_port_no_encrypt = 521 master->control_port_no_encrypt; 522 sdata->vif.cab_queue = master->vif.cab_queue; 523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 524 sizeof(sdata->vif.hw_queue)); 525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 526 527 mutex_lock(&local->key_mtx); 528 sdata->crypto_tx_tailroom_needed_cnt += 529 master->crypto_tx_tailroom_needed_cnt; 530 mutex_unlock(&local->key_mtx); 531 532 break; 533 } 534 case NL80211_IFTYPE_AP: 535 sdata->bss = &sdata->u.ap; 536 break; 537 case NL80211_IFTYPE_MESH_POINT: 538 case NL80211_IFTYPE_STATION: 539 case NL80211_IFTYPE_MONITOR: 540 case NL80211_IFTYPE_ADHOC: 541 case NL80211_IFTYPE_P2P_DEVICE: 542 case NL80211_IFTYPE_OCB: 543 case NL80211_IFTYPE_NAN: 544 /* no special treatment */ 545 break; 546 case NL80211_IFTYPE_UNSPECIFIED: 547 case NUM_NL80211_IFTYPES: 548 case NL80211_IFTYPE_P2P_CLIENT: 549 case NL80211_IFTYPE_P2P_GO: 550 /* cannot happen */ 551 WARN_ON(1); 552 break; 553 } 554 555 if (local->open_count == 0) { 556 res = drv_start(local); 557 if (res) 558 goto err_del_bss; 559 /* we're brought up, everything changes */ 560 hw_reconf_flags = ~0; 561 ieee80211_led_radio(local, true); 562 ieee80211_mod_tpt_led_trig(local, 563 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 564 } 565 566 /* 567 * Copy the hopefully now-present MAC address to 568 * this interface, if it has the special null one. 569 */ 570 if (dev && is_zero_ether_addr(dev->dev_addr)) { 571 memcpy(dev->dev_addr, 572 local->hw.wiphy->perm_addr, 573 ETH_ALEN); 574 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 575 576 if (!is_valid_ether_addr(dev->dev_addr)) { 577 res = -EADDRNOTAVAIL; 578 goto err_stop; 579 } 580 } 581 582 switch (sdata->vif.type) { 583 case NL80211_IFTYPE_AP_VLAN: 584 /* no need to tell driver, but set carrier and chanctx */ 585 if (rtnl_dereference(sdata->bss->beacon)) { 586 ieee80211_vif_vlan_copy_chanctx(sdata); 587 netif_carrier_on(dev); 588 } else { 589 netif_carrier_off(dev); 590 } 591 break; 592 case NL80211_IFTYPE_MONITOR: 593 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 594 local->cooked_mntrs++; 595 break; 596 } 597 598 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 599 res = drv_add_interface(local, sdata); 600 if (res) 601 goto err_stop; 602 } else if (local->monitors == 0 && local->open_count == 0) { 603 res = ieee80211_add_virtual_monitor(local); 604 if (res) 605 goto err_stop; 606 } 607 608 /* must be before the call to ieee80211_configure_filter */ 609 local->monitors++; 610 if (local->monitors == 1) { 611 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 612 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 613 } 614 615 ieee80211_adjust_monitor_flags(sdata, 1); 616 ieee80211_configure_filter(local); 617 mutex_lock(&local->mtx); 618 ieee80211_recalc_idle(local); 619 mutex_unlock(&local->mtx); 620 621 netif_carrier_on(dev); 622 break; 623 default: 624 if (coming_up) { 625 ieee80211_del_virtual_monitor(local); 626 627 res = drv_add_interface(local, sdata); 628 if (res) 629 goto err_stop; 630 res = ieee80211_check_queues(sdata, 631 ieee80211_vif_type_p2p(&sdata->vif)); 632 if (res) 633 goto err_del_interface; 634 } 635 636 if (sdata->vif.type == NL80211_IFTYPE_AP) { 637 local->fif_pspoll++; 638 local->fif_probe_req++; 639 640 ieee80211_configure_filter(local); 641 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 642 local->fif_probe_req++; 643 } 644 645 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 646 sdata->vif.type != NL80211_IFTYPE_NAN) 647 changed |= ieee80211_reset_erp_info(sdata); 648 ieee80211_bss_info_change_notify(sdata, changed); 649 650 switch (sdata->vif.type) { 651 case NL80211_IFTYPE_STATION: 652 case NL80211_IFTYPE_ADHOC: 653 case NL80211_IFTYPE_AP: 654 case NL80211_IFTYPE_MESH_POINT: 655 case NL80211_IFTYPE_OCB: 656 netif_carrier_off(dev); 657 break; 658 case NL80211_IFTYPE_WDS: 659 case NL80211_IFTYPE_P2P_DEVICE: 660 case NL80211_IFTYPE_NAN: 661 break; 662 default: 663 /* not reached */ 664 WARN_ON(1); 665 } 666 667 /* 668 * Set default queue parameters so drivers don't 669 * need to initialise the hardware if the hardware 670 * doesn't start up with sane defaults. 671 * Enable QoS for anything but station interfaces. 672 */ 673 ieee80211_set_wmm_default(sdata, true, 674 sdata->vif.type != NL80211_IFTYPE_STATION); 675 } 676 677 set_bit(SDATA_STATE_RUNNING, &sdata->state); 678 679 switch (sdata->vif.type) { 680 case NL80211_IFTYPE_WDS: 681 /* Create STA entry for the WDS peer */ 682 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 683 GFP_KERNEL); 684 if (!sta) { 685 res = -ENOMEM; 686 goto err_del_interface; 687 } 688 689 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 690 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 692 693 res = sta_info_insert(sta); 694 if (res) { 695 /* STA has been freed */ 696 goto err_del_interface; 697 } 698 699 rate_control_rate_init(sta); 700 netif_carrier_on(dev); 701 break; 702 case NL80211_IFTYPE_P2P_DEVICE: 703 rcu_assign_pointer(local->p2p_sdata, sdata); 704 break; 705 case NL80211_IFTYPE_MONITOR: 706 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 707 break; 708 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 709 break; 710 default: 711 break; 712 } 713 714 /* 715 * set_multicast_list will be invoked by the networking core 716 * which will check whether any increments here were done in 717 * error and sync them down to the hardware as filter flags. 718 */ 719 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 720 atomic_inc(&local->iff_allmultis); 721 722 if (coming_up) 723 local->open_count++; 724 725 if (hw_reconf_flags) 726 ieee80211_hw_config(local, hw_reconf_flags); 727 728 ieee80211_recalc_ps(local); 729 730 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 731 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 732 local->ops->wake_tx_queue) { 733 /* XXX: for AP_VLAN, actually track AP queues */ 734 if (dev) 735 netif_tx_start_all_queues(dev); 736 } else if (dev) { 737 unsigned long flags; 738 int n_acs = IEEE80211_NUM_ACS; 739 int ac; 740 741 if (local->hw.queues < IEEE80211_NUM_ACS) 742 n_acs = 1; 743 744 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 745 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 746 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 747 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 748 for (ac = 0; ac < n_acs; ac++) { 749 int ac_queue = sdata->vif.hw_queue[ac]; 750 751 if (local->queue_stop_reasons[ac_queue] == 0 && 752 skb_queue_empty(&local->pending[ac_queue])) 753 netif_start_subqueue(dev, ac); 754 } 755 } 756 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 757 } 758 759 return 0; 760 err_del_interface: 761 drv_remove_interface(local, sdata); 762 err_stop: 763 if (!local->open_count) 764 drv_stop(local); 765 err_del_bss: 766 sdata->bss = NULL; 767 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 768 mutex_lock(&local->mtx); 769 list_del(&sdata->u.vlan.list); 770 mutex_unlock(&local->mtx); 771 } 772 /* might already be clear but that doesn't matter */ 773 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 774 return res; 775 } 776 777 static int ieee80211_open(struct net_device *dev) 778 { 779 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 780 int err; 781 782 /* fail early if user set an invalid address */ 783 if (!is_valid_ether_addr(dev->dev_addr)) 784 return -EADDRNOTAVAIL; 785 786 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 787 if (err) 788 return err; 789 790 return ieee80211_do_open(&sdata->wdev, true); 791 } 792 793 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 794 bool going_down) 795 { 796 struct ieee80211_sub_if_data *txq_sdata = sdata; 797 struct ieee80211_local *local = sdata->local; 798 struct fq *fq = &local->fq; 799 unsigned long flags; 800 struct sk_buff *skb, *tmp; 801 u32 hw_reconf_flags = 0; 802 int i, flushed; 803 struct ps_data *ps; 804 struct cfg80211_chan_def chandef; 805 bool cancel_scan; 806 struct cfg80211_nan_func *func; 807 808 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 809 810 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 811 if (cancel_scan) 812 ieee80211_scan_cancel(local); 813 814 /* 815 * Stop TX on this interface first. 816 */ 817 if (sdata->dev) 818 netif_tx_stop_all_queues(sdata->dev); 819 820 ieee80211_roc_purge(local, sdata); 821 822 switch (sdata->vif.type) { 823 case NL80211_IFTYPE_STATION: 824 ieee80211_mgd_stop(sdata); 825 break; 826 case NL80211_IFTYPE_ADHOC: 827 ieee80211_ibss_stop(sdata); 828 break; 829 case NL80211_IFTYPE_AP: 830 cancel_work_sync(&sdata->u.ap.request_smps_work); 831 break; 832 case NL80211_IFTYPE_MONITOR: 833 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 834 break; 835 list_del_rcu(&sdata->u.mntr.list); 836 break; 837 default: 838 break; 839 } 840 841 /* 842 * Remove all stations associated with this interface. 843 * 844 * This must be done before calling ops->remove_interface() 845 * because otherwise we can later invoke ops->sta_notify() 846 * whenever the STAs are removed, and that invalidates driver 847 * assumptions about always getting a vif pointer that is valid 848 * (because if we remove a STA after ops->remove_interface() 849 * the driver will have removed the vif info already!) 850 * 851 * In WDS mode a station must exist here and be flushed, for 852 * AP_VLANs stations may exist since there's nothing else that 853 * would have removed them, but in other modes there shouldn't 854 * be any stations. 855 */ 856 flushed = sta_info_flush(sdata); 857 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 858 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 859 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 860 861 /* don't count this interface for allmulti while it is down */ 862 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 863 atomic_dec(&local->iff_allmultis); 864 865 if (sdata->vif.type == NL80211_IFTYPE_AP) { 866 local->fif_pspoll--; 867 local->fif_probe_req--; 868 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 869 local->fif_probe_req--; 870 } 871 872 if (sdata->dev) { 873 netif_addr_lock_bh(sdata->dev); 874 spin_lock_bh(&local->filter_lock); 875 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 876 sdata->dev->addr_len); 877 spin_unlock_bh(&local->filter_lock); 878 netif_addr_unlock_bh(sdata->dev); 879 } 880 881 del_timer_sync(&local->dynamic_ps_timer); 882 cancel_work_sync(&local->dynamic_ps_enable_work); 883 884 cancel_work_sync(&sdata->recalc_smps); 885 sdata_lock(sdata); 886 mutex_lock(&local->mtx); 887 sdata->vif.csa_active = false; 888 if (sdata->vif.type == NL80211_IFTYPE_STATION) 889 sdata->u.mgd.csa_waiting_bcn = false; 890 if (sdata->csa_block_tx) { 891 ieee80211_wake_vif_queues(local, sdata, 892 IEEE80211_QUEUE_STOP_REASON_CSA); 893 sdata->csa_block_tx = false; 894 } 895 mutex_unlock(&local->mtx); 896 sdata_unlock(sdata); 897 898 cancel_work_sync(&sdata->csa_finalize_work); 899 900 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 901 902 if (sdata->wdev.cac_started) { 903 chandef = sdata->vif.bss_conf.chandef; 904 WARN_ON(local->suspended); 905 mutex_lock(&local->mtx); 906 ieee80211_vif_release_channel(sdata); 907 mutex_unlock(&local->mtx); 908 cfg80211_cac_event(sdata->dev, &chandef, 909 NL80211_RADAR_CAC_ABORTED, 910 GFP_KERNEL); 911 } 912 913 /* APs need special treatment */ 914 if (sdata->vif.type == NL80211_IFTYPE_AP) { 915 struct ieee80211_sub_if_data *vlan, *tmpsdata; 916 917 /* down all dependent devices, that is VLANs */ 918 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 919 u.vlan.list) 920 dev_close(vlan->dev); 921 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 922 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 923 /* remove all packets in parent bc_buf pointing to this dev */ 924 ps = &sdata->bss->ps; 925 926 spin_lock_irqsave(&ps->bc_buf.lock, flags); 927 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 928 if (skb->dev == sdata->dev) { 929 __skb_unlink(skb, &ps->bc_buf); 930 local->total_ps_buffered--; 931 ieee80211_free_txskb(&local->hw, skb); 932 } 933 } 934 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 935 } 936 937 if (going_down) 938 local->open_count--; 939 940 switch (sdata->vif.type) { 941 case NL80211_IFTYPE_AP_VLAN: 942 txq_sdata = container_of(sdata->bss, 943 struct ieee80211_sub_if_data, u.ap); 944 945 mutex_lock(&local->mtx); 946 list_del(&sdata->u.vlan.list); 947 mutex_unlock(&local->mtx); 948 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 949 /* see comment in the default case below */ 950 ieee80211_free_keys(sdata, true); 951 /* no need to tell driver */ 952 break; 953 case NL80211_IFTYPE_MONITOR: 954 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 955 local->cooked_mntrs--; 956 break; 957 } 958 959 local->monitors--; 960 if (local->monitors == 0) { 961 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 962 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 963 } 964 965 ieee80211_adjust_monitor_flags(sdata, -1); 966 break; 967 case NL80211_IFTYPE_NAN: 968 /* clean all the functions */ 969 spin_lock_bh(&sdata->u.nan.func_lock); 970 971 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 972 idr_remove(&sdata->u.nan.function_inst_ids, i); 973 cfg80211_free_nan_func(func); 974 } 975 idr_destroy(&sdata->u.nan.function_inst_ids); 976 977 spin_unlock_bh(&sdata->u.nan.func_lock); 978 break; 979 case NL80211_IFTYPE_P2P_DEVICE: 980 /* relies on synchronize_rcu() below */ 981 RCU_INIT_POINTER(local->p2p_sdata, NULL); 982 /* fall through */ 983 default: 984 cancel_work_sync(&sdata->work); 985 /* 986 * When we get here, the interface is marked down. 987 * Free the remaining keys, if there are any 988 * (which can happen in AP mode if userspace sets 989 * keys before the interface is operating, and maybe 990 * also in WDS mode) 991 * 992 * Force the key freeing to always synchronize_net() 993 * to wait for the RX path in case it is using this 994 * interface enqueuing frames at this very time on 995 * another CPU. 996 */ 997 ieee80211_free_keys(sdata, true); 998 skb_queue_purge(&sdata->skb_queue); 999 } 1000 1001 sdata->bss = NULL; 1002 1003 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1004 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 1005 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 1006 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1007 if (info->control.vif == &sdata->vif) { 1008 __skb_unlink(skb, &local->pending[i]); 1009 ieee80211_free_txskb(&local->hw, skb); 1010 } 1011 } 1012 } 1013 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1014 1015 if (txq_sdata->vif.txq) { 1016 struct txq_info *txqi = to_txq_info(txq_sdata->vif.txq); 1017 1018 /* 1019 * FIXME FIXME 1020 * 1021 * We really shouldn't purge the *entire* txqi since that 1022 * contains frames for the other AP_VLANs (and possibly 1023 * the AP itself) as well, but there's no API in FQ now 1024 * to be able to filter. 1025 */ 1026 1027 spin_lock_bh(&fq->lock); 1028 ieee80211_txq_purge(local, txqi); 1029 spin_unlock_bh(&fq->lock); 1030 } 1031 1032 if (local->open_count == 0) 1033 ieee80211_clear_tx_pending(local); 1034 1035 /* 1036 * If the interface goes down while suspended, presumably because 1037 * the device was unplugged and that happens before our resume, 1038 * then the driver is already unconfigured and the remainder of 1039 * this function isn't needed. 1040 * XXX: what about WoWLAN? If the device has software state, e.g. 1041 * memory allocated, it might expect teardown commands from 1042 * mac80211 here? 1043 */ 1044 if (local->suspended) { 1045 WARN_ON(local->wowlan); 1046 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1047 return; 1048 } 1049 1050 switch (sdata->vif.type) { 1051 case NL80211_IFTYPE_AP_VLAN: 1052 break; 1053 case NL80211_IFTYPE_MONITOR: 1054 if (local->monitors == 0) 1055 ieee80211_del_virtual_monitor(local); 1056 1057 mutex_lock(&local->mtx); 1058 ieee80211_recalc_idle(local); 1059 mutex_unlock(&local->mtx); 1060 1061 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1062 break; 1063 1064 /* fall through */ 1065 default: 1066 if (going_down) 1067 drv_remove_interface(local, sdata); 1068 } 1069 1070 ieee80211_recalc_ps(local); 1071 1072 if (cancel_scan) 1073 flush_delayed_work(&local->scan_work); 1074 1075 if (local->open_count == 0) { 1076 ieee80211_stop_device(local); 1077 1078 /* no reconfiguring after stop! */ 1079 return; 1080 } 1081 1082 /* do after stop to avoid reconfiguring when we stop anyway */ 1083 ieee80211_configure_filter(local); 1084 ieee80211_hw_config(local, hw_reconf_flags); 1085 1086 if (local->monitors == local->open_count) 1087 ieee80211_add_virtual_monitor(local); 1088 } 1089 1090 static int ieee80211_stop(struct net_device *dev) 1091 { 1092 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1093 1094 ieee80211_do_stop(sdata, true); 1095 1096 return 0; 1097 } 1098 1099 static void ieee80211_set_multicast_list(struct net_device *dev) 1100 { 1101 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1102 struct ieee80211_local *local = sdata->local; 1103 int allmulti, sdata_allmulti; 1104 1105 allmulti = !!(dev->flags & IFF_ALLMULTI); 1106 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1107 1108 if (allmulti != sdata_allmulti) { 1109 if (dev->flags & IFF_ALLMULTI) 1110 atomic_inc(&local->iff_allmultis); 1111 else 1112 atomic_dec(&local->iff_allmultis); 1113 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1114 } 1115 1116 spin_lock_bh(&local->filter_lock); 1117 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1118 spin_unlock_bh(&local->filter_lock); 1119 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1120 } 1121 1122 /* 1123 * Called when the netdev is removed or, by the code below, before 1124 * the interface type changes. 1125 */ 1126 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1127 { 1128 int i; 1129 1130 /* free extra data */ 1131 ieee80211_free_keys(sdata, false); 1132 1133 ieee80211_debugfs_remove_netdev(sdata); 1134 1135 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1136 __skb_queue_purge(&sdata->fragments[i].skb_list); 1137 sdata->fragment_next = 0; 1138 1139 if (ieee80211_vif_is_mesh(&sdata->vif)) 1140 ieee80211_mesh_teardown_sdata(sdata); 1141 } 1142 1143 static void ieee80211_uninit(struct net_device *dev) 1144 { 1145 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1146 } 1147 1148 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1149 struct sk_buff *skb, 1150 void *accel_priv, 1151 select_queue_fallback_t fallback) 1152 { 1153 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1154 } 1155 1156 static void 1157 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1158 { 1159 int i; 1160 1161 for_each_possible_cpu(i) { 1162 const struct pcpu_sw_netstats *tstats; 1163 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1164 unsigned int start; 1165 1166 tstats = per_cpu_ptr(dev->tstats, i); 1167 1168 do { 1169 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1170 rx_packets = tstats->rx_packets; 1171 tx_packets = tstats->tx_packets; 1172 rx_bytes = tstats->rx_bytes; 1173 tx_bytes = tstats->tx_bytes; 1174 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1175 1176 stats->rx_packets += rx_packets; 1177 stats->tx_packets += tx_packets; 1178 stats->rx_bytes += rx_bytes; 1179 stats->tx_bytes += tx_bytes; 1180 } 1181 } 1182 1183 static const struct net_device_ops ieee80211_dataif_ops = { 1184 .ndo_open = ieee80211_open, 1185 .ndo_stop = ieee80211_stop, 1186 .ndo_uninit = ieee80211_uninit, 1187 .ndo_start_xmit = ieee80211_subif_start_xmit, 1188 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1189 .ndo_set_mac_address = ieee80211_change_mac, 1190 .ndo_select_queue = ieee80211_netdev_select_queue, 1191 .ndo_get_stats64 = ieee80211_get_stats64, 1192 }; 1193 1194 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1195 struct sk_buff *skb, 1196 void *accel_priv, 1197 select_queue_fallback_t fallback) 1198 { 1199 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1200 struct ieee80211_local *local = sdata->local; 1201 struct ieee80211_hdr *hdr; 1202 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1203 1204 if (local->hw.queues < IEEE80211_NUM_ACS) 1205 return 0; 1206 1207 if (skb->len < 4 || 1208 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1209 return 0; /* doesn't matter, frame will be dropped */ 1210 1211 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1212 1213 return ieee80211_select_queue_80211(sdata, skb, hdr); 1214 } 1215 1216 static const struct net_device_ops ieee80211_monitorif_ops = { 1217 .ndo_open = ieee80211_open, 1218 .ndo_stop = ieee80211_stop, 1219 .ndo_uninit = ieee80211_uninit, 1220 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1221 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1222 .ndo_set_mac_address = ieee80211_change_mac, 1223 .ndo_select_queue = ieee80211_monitor_select_queue, 1224 .ndo_get_stats64 = ieee80211_get_stats64, 1225 }; 1226 1227 static void ieee80211_if_free(struct net_device *dev) 1228 { 1229 free_percpu(dev->tstats); 1230 } 1231 1232 static void ieee80211_if_setup(struct net_device *dev) 1233 { 1234 ether_setup(dev); 1235 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1236 dev->netdev_ops = &ieee80211_dataif_ops; 1237 dev->needs_free_netdev = true; 1238 dev->priv_destructor = ieee80211_if_free; 1239 } 1240 1241 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1242 { 1243 ieee80211_if_setup(dev); 1244 dev->priv_flags |= IFF_NO_QUEUE; 1245 } 1246 1247 static void ieee80211_iface_work(struct work_struct *work) 1248 { 1249 struct ieee80211_sub_if_data *sdata = 1250 container_of(work, struct ieee80211_sub_if_data, work); 1251 struct ieee80211_local *local = sdata->local; 1252 struct sk_buff *skb; 1253 struct sta_info *sta; 1254 1255 if (!ieee80211_sdata_running(sdata)) 1256 return; 1257 1258 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1259 return; 1260 1261 if (!ieee80211_can_run_worker(local)) 1262 return; 1263 1264 /* first process frames */ 1265 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1266 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1267 1268 if (ieee80211_is_action(mgmt->frame_control) && 1269 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1270 int len = skb->len; 1271 1272 mutex_lock(&local->sta_mtx); 1273 sta = sta_info_get_bss(sdata, mgmt->sa); 1274 if (sta) { 1275 switch (mgmt->u.action.u.addba_req.action_code) { 1276 case WLAN_ACTION_ADDBA_REQ: 1277 ieee80211_process_addba_request( 1278 local, sta, mgmt, len); 1279 break; 1280 case WLAN_ACTION_ADDBA_RESP: 1281 ieee80211_process_addba_resp(local, sta, 1282 mgmt, len); 1283 break; 1284 case WLAN_ACTION_DELBA: 1285 ieee80211_process_delba(sdata, sta, 1286 mgmt, len); 1287 break; 1288 default: 1289 WARN_ON(1); 1290 break; 1291 } 1292 } 1293 mutex_unlock(&local->sta_mtx); 1294 } else if (ieee80211_is_action(mgmt->frame_control) && 1295 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1296 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1297 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1298 struct ieee80211_rx_status *status; 1299 enum nl80211_band band; 1300 u8 opmode; 1301 1302 status = IEEE80211_SKB_RXCB(skb); 1303 band = status->band; 1304 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1305 1306 mutex_lock(&local->sta_mtx); 1307 sta = sta_info_get_bss(sdata, mgmt->sa); 1308 1309 if (sta) 1310 ieee80211_vht_handle_opmode(sdata, sta, 1311 opmode, 1312 band); 1313 1314 mutex_unlock(&local->sta_mtx); 1315 break; 1316 } 1317 case WLAN_VHT_ACTION_GROUPID_MGMT: 1318 ieee80211_process_mu_groups(sdata, mgmt); 1319 break; 1320 default: 1321 WARN_ON(1); 1322 break; 1323 } 1324 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1325 struct ieee80211_hdr *hdr = (void *)mgmt; 1326 /* 1327 * So the frame isn't mgmt, but frame_control 1328 * is at the right place anyway, of course, so 1329 * the if statement is correct. 1330 * 1331 * Warn if we have other data frame types here, 1332 * they must not get here. 1333 */ 1334 WARN_ON(hdr->frame_control & 1335 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1336 WARN_ON(!(hdr->seq_ctrl & 1337 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1338 /* 1339 * This was a fragment of a frame, received while 1340 * a block-ack session was active. That cannot be 1341 * right, so terminate the session. 1342 */ 1343 mutex_lock(&local->sta_mtx); 1344 sta = sta_info_get_bss(sdata, mgmt->sa); 1345 if (sta) { 1346 u16 tid = *ieee80211_get_qos_ctl(hdr) & 1347 IEEE80211_QOS_CTL_TID_MASK; 1348 1349 __ieee80211_stop_rx_ba_session( 1350 sta, tid, WLAN_BACK_RECIPIENT, 1351 WLAN_REASON_QSTA_REQUIRE_SETUP, 1352 true); 1353 } 1354 mutex_unlock(&local->sta_mtx); 1355 } else switch (sdata->vif.type) { 1356 case NL80211_IFTYPE_STATION: 1357 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1358 break; 1359 case NL80211_IFTYPE_ADHOC: 1360 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1361 break; 1362 case NL80211_IFTYPE_MESH_POINT: 1363 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1364 break; 1365 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1366 break; 1367 default: 1368 WARN(1, "frame for unexpected interface type"); 1369 break; 1370 } 1371 1372 kfree_skb(skb); 1373 } 1374 1375 /* then other type-dependent work */ 1376 switch (sdata->vif.type) { 1377 case NL80211_IFTYPE_STATION: 1378 ieee80211_sta_work(sdata); 1379 break; 1380 case NL80211_IFTYPE_ADHOC: 1381 ieee80211_ibss_work(sdata); 1382 break; 1383 case NL80211_IFTYPE_MESH_POINT: 1384 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1385 break; 1386 ieee80211_mesh_work(sdata); 1387 break; 1388 case NL80211_IFTYPE_OCB: 1389 ieee80211_ocb_work(sdata); 1390 break; 1391 default: 1392 break; 1393 } 1394 } 1395 1396 static void ieee80211_recalc_smps_work(struct work_struct *work) 1397 { 1398 struct ieee80211_sub_if_data *sdata = 1399 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1400 1401 ieee80211_recalc_smps(sdata); 1402 } 1403 1404 /* 1405 * Helper function to initialise an interface to a specific type. 1406 */ 1407 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1408 enum nl80211_iftype type) 1409 { 1410 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1411 0xff, 0xff, 0xff}; 1412 1413 /* clear type-dependent union */ 1414 memset(&sdata->u, 0, sizeof(sdata->u)); 1415 1416 /* and set some type-dependent values */ 1417 sdata->vif.type = type; 1418 sdata->vif.p2p = false; 1419 sdata->wdev.iftype = type; 1420 1421 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1422 sdata->control_port_no_encrypt = false; 1423 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1424 sdata->vif.bss_conf.idle = true; 1425 1426 sdata->noack_map = 0; 1427 1428 /* only monitor/p2p-device differ */ 1429 if (sdata->dev) { 1430 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1431 sdata->dev->type = ARPHRD_ETHER; 1432 } 1433 1434 skb_queue_head_init(&sdata->skb_queue); 1435 INIT_WORK(&sdata->work, ieee80211_iface_work); 1436 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1437 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1438 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1439 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1440 1441 switch (type) { 1442 case NL80211_IFTYPE_P2P_GO: 1443 type = NL80211_IFTYPE_AP; 1444 sdata->vif.type = type; 1445 sdata->vif.p2p = true; 1446 /* fall through */ 1447 case NL80211_IFTYPE_AP: 1448 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1449 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1450 INIT_WORK(&sdata->u.ap.request_smps_work, 1451 ieee80211_request_smps_ap_work); 1452 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1453 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; 1454 break; 1455 case NL80211_IFTYPE_P2P_CLIENT: 1456 type = NL80211_IFTYPE_STATION; 1457 sdata->vif.type = type; 1458 sdata->vif.p2p = true; 1459 /* fall through */ 1460 case NL80211_IFTYPE_STATION: 1461 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1462 ieee80211_sta_setup_sdata(sdata); 1463 break; 1464 case NL80211_IFTYPE_OCB: 1465 sdata->vif.bss_conf.bssid = bssid_wildcard; 1466 ieee80211_ocb_setup_sdata(sdata); 1467 break; 1468 case NL80211_IFTYPE_ADHOC: 1469 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1470 ieee80211_ibss_setup_sdata(sdata); 1471 break; 1472 case NL80211_IFTYPE_MESH_POINT: 1473 if (ieee80211_vif_is_mesh(&sdata->vif)) 1474 ieee80211_mesh_init_sdata(sdata); 1475 break; 1476 case NL80211_IFTYPE_MONITOR: 1477 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1478 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1479 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1480 MONITOR_FLAG_OTHER_BSS; 1481 break; 1482 case NL80211_IFTYPE_WDS: 1483 sdata->vif.bss_conf.bssid = NULL; 1484 break; 1485 case NL80211_IFTYPE_NAN: 1486 idr_init(&sdata->u.nan.function_inst_ids); 1487 spin_lock_init(&sdata->u.nan.func_lock); 1488 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1489 break; 1490 case NL80211_IFTYPE_AP_VLAN: 1491 case NL80211_IFTYPE_P2P_DEVICE: 1492 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1493 break; 1494 case NL80211_IFTYPE_UNSPECIFIED: 1495 case NUM_NL80211_IFTYPES: 1496 BUG(); 1497 break; 1498 } 1499 1500 ieee80211_debugfs_add_netdev(sdata); 1501 } 1502 1503 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1504 enum nl80211_iftype type) 1505 { 1506 struct ieee80211_local *local = sdata->local; 1507 int ret, err; 1508 enum nl80211_iftype internal_type = type; 1509 bool p2p = false; 1510 1511 ASSERT_RTNL(); 1512 1513 if (!local->ops->change_interface) 1514 return -EBUSY; 1515 1516 switch (sdata->vif.type) { 1517 case NL80211_IFTYPE_AP: 1518 case NL80211_IFTYPE_STATION: 1519 case NL80211_IFTYPE_ADHOC: 1520 case NL80211_IFTYPE_OCB: 1521 /* 1522 * Could maybe also all others here? 1523 * Just not sure how that interacts 1524 * with the RX/config path e.g. for 1525 * mesh. 1526 */ 1527 break; 1528 default: 1529 return -EBUSY; 1530 } 1531 1532 switch (type) { 1533 case NL80211_IFTYPE_AP: 1534 case NL80211_IFTYPE_STATION: 1535 case NL80211_IFTYPE_ADHOC: 1536 case NL80211_IFTYPE_OCB: 1537 /* 1538 * Could probably support everything 1539 * but WDS here (WDS do_open can fail 1540 * under memory pressure, which this 1541 * code isn't prepared to handle). 1542 */ 1543 break; 1544 case NL80211_IFTYPE_P2P_CLIENT: 1545 p2p = true; 1546 internal_type = NL80211_IFTYPE_STATION; 1547 break; 1548 case NL80211_IFTYPE_P2P_GO: 1549 p2p = true; 1550 internal_type = NL80211_IFTYPE_AP; 1551 break; 1552 default: 1553 return -EBUSY; 1554 } 1555 1556 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1557 if (ret) 1558 return ret; 1559 1560 ieee80211_do_stop(sdata, false); 1561 1562 ieee80211_teardown_sdata(sdata); 1563 1564 ret = drv_change_interface(local, sdata, internal_type, p2p); 1565 if (ret) 1566 type = ieee80211_vif_type_p2p(&sdata->vif); 1567 1568 /* 1569 * Ignore return value here, there's not much we can do since 1570 * the driver changed the interface type internally already. 1571 * The warnings will hopefully make driver authors fix it :-) 1572 */ 1573 ieee80211_check_queues(sdata, type); 1574 1575 ieee80211_setup_sdata(sdata, type); 1576 1577 err = ieee80211_do_open(&sdata->wdev, false); 1578 WARN(err, "type change: do_open returned %d", err); 1579 1580 return ret; 1581 } 1582 1583 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1584 enum nl80211_iftype type) 1585 { 1586 int ret; 1587 1588 ASSERT_RTNL(); 1589 1590 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1591 return 0; 1592 1593 if (ieee80211_sdata_running(sdata)) { 1594 ret = ieee80211_runtime_change_iftype(sdata, type); 1595 if (ret) 1596 return ret; 1597 } else { 1598 /* Purge and reset type-dependent state. */ 1599 ieee80211_teardown_sdata(sdata); 1600 ieee80211_setup_sdata(sdata, type); 1601 } 1602 1603 /* reset some values that shouldn't be kept across type changes */ 1604 if (type == NL80211_IFTYPE_STATION) 1605 sdata->u.mgd.use_4addr = false; 1606 1607 return 0; 1608 } 1609 1610 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1611 u8 *perm_addr, enum nl80211_iftype type) 1612 { 1613 struct ieee80211_sub_if_data *sdata; 1614 u64 mask, start, addr, val, inc; 1615 u8 *m; 1616 u8 tmp_addr[ETH_ALEN]; 1617 int i; 1618 1619 /* default ... something at least */ 1620 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1621 1622 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1623 local->hw.wiphy->n_addresses <= 1) 1624 return; 1625 1626 mutex_lock(&local->iflist_mtx); 1627 1628 switch (type) { 1629 case NL80211_IFTYPE_MONITOR: 1630 /* doesn't matter */ 1631 break; 1632 case NL80211_IFTYPE_WDS: 1633 case NL80211_IFTYPE_AP_VLAN: 1634 /* match up with an AP interface */ 1635 list_for_each_entry(sdata, &local->interfaces, list) { 1636 if (sdata->vif.type != NL80211_IFTYPE_AP) 1637 continue; 1638 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1639 break; 1640 } 1641 /* keep default if no AP interface present */ 1642 break; 1643 case NL80211_IFTYPE_P2P_CLIENT: 1644 case NL80211_IFTYPE_P2P_GO: 1645 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1646 list_for_each_entry(sdata, &local->interfaces, list) { 1647 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1648 continue; 1649 if (!ieee80211_sdata_running(sdata)) 1650 continue; 1651 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1652 goto out_unlock; 1653 } 1654 } 1655 /* otherwise fall through */ 1656 default: 1657 /* assign a new address if possible -- try n_addresses first */ 1658 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1659 bool used = false; 1660 1661 list_for_each_entry(sdata, &local->interfaces, list) { 1662 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1663 sdata->vif.addr)) { 1664 used = true; 1665 break; 1666 } 1667 } 1668 1669 if (!used) { 1670 memcpy(perm_addr, 1671 local->hw.wiphy->addresses[i].addr, 1672 ETH_ALEN); 1673 break; 1674 } 1675 } 1676 1677 /* try mask if available */ 1678 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1679 break; 1680 1681 m = local->hw.wiphy->addr_mask; 1682 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1683 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1684 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1685 1686 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1687 /* not a contiguous mask ... not handled now! */ 1688 pr_info("not contiguous\n"); 1689 break; 1690 } 1691 1692 /* 1693 * Pick address of existing interface in case user changed 1694 * MAC address manually, default to perm_addr. 1695 */ 1696 m = local->hw.wiphy->perm_addr; 1697 list_for_each_entry(sdata, &local->interfaces, list) { 1698 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1699 continue; 1700 m = sdata->vif.addr; 1701 break; 1702 } 1703 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1704 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1705 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1706 1707 inc = 1ULL<<__ffs64(mask); 1708 val = (start & mask); 1709 addr = (start & ~mask) | (val & mask); 1710 do { 1711 bool used = false; 1712 1713 tmp_addr[5] = addr >> 0*8; 1714 tmp_addr[4] = addr >> 1*8; 1715 tmp_addr[3] = addr >> 2*8; 1716 tmp_addr[2] = addr >> 3*8; 1717 tmp_addr[1] = addr >> 4*8; 1718 tmp_addr[0] = addr >> 5*8; 1719 1720 val += inc; 1721 1722 list_for_each_entry(sdata, &local->interfaces, list) { 1723 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1724 used = true; 1725 break; 1726 } 1727 } 1728 1729 if (!used) { 1730 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1731 break; 1732 } 1733 addr = (start & ~mask) | (val & mask); 1734 } while (addr != start); 1735 1736 break; 1737 } 1738 1739 out_unlock: 1740 mutex_unlock(&local->iflist_mtx); 1741 } 1742 1743 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1744 unsigned char name_assign_type, 1745 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1746 struct vif_params *params) 1747 { 1748 struct net_device *ndev = NULL; 1749 struct ieee80211_sub_if_data *sdata = NULL; 1750 struct txq_info *txqi; 1751 void (*if_setup)(struct net_device *dev); 1752 int ret, i; 1753 int txqs = 1; 1754 1755 ASSERT_RTNL(); 1756 1757 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1758 struct wireless_dev *wdev; 1759 1760 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1761 GFP_KERNEL); 1762 if (!sdata) 1763 return -ENOMEM; 1764 wdev = &sdata->wdev; 1765 1766 sdata->dev = NULL; 1767 strlcpy(sdata->name, name, IFNAMSIZ); 1768 ieee80211_assign_perm_addr(local, wdev->address, type); 1769 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1770 } else { 1771 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1772 sizeof(void *)); 1773 int txq_size = 0; 1774 1775 if (local->ops->wake_tx_queue) 1776 txq_size += sizeof(struct txq_info) + 1777 local->hw.txq_data_size; 1778 1779 if (local->ops->wake_tx_queue) 1780 if_setup = ieee80211_if_setup_no_queue; 1781 else 1782 if_setup = ieee80211_if_setup; 1783 1784 if (local->hw.queues >= IEEE80211_NUM_ACS) 1785 txqs = IEEE80211_NUM_ACS; 1786 1787 ndev = alloc_netdev_mqs(size + txq_size, 1788 name, name_assign_type, 1789 if_setup, txqs, 1); 1790 if (!ndev) 1791 return -ENOMEM; 1792 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1793 1794 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1795 if (!ndev->tstats) { 1796 free_netdev(ndev); 1797 return -ENOMEM; 1798 } 1799 1800 ndev->needed_headroom = local->tx_headroom + 1801 4*6 /* four MAC addresses */ 1802 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1803 + 6 /* mesh */ 1804 + 8 /* rfc1042/bridge tunnel */ 1805 - ETH_HLEN /* ethernet hard_header_len */ 1806 + IEEE80211_ENCRYPT_HEADROOM; 1807 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1808 1809 ret = dev_alloc_name(ndev, ndev->name); 1810 if (ret < 0) { 1811 ieee80211_if_free(ndev); 1812 free_netdev(ndev); 1813 return ret; 1814 } 1815 1816 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1817 if (params && is_valid_ether_addr(params->macaddr)) 1818 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1819 else 1820 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1821 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1822 1823 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1824 sdata = netdev_priv(ndev); 1825 ndev->ieee80211_ptr = &sdata->wdev; 1826 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1827 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1828 1829 if (txq_size) { 1830 txqi = netdev_priv(ndev) + size; 1831 ieee80211_txq_init(sdata, NULL, txqi, 0); 1832 } 1833 1834 sdata->dev = ndev; 1835 } 1836 1837 /* initialise type-independent data */ 1838 sdata->wdev.wiphy = local->hw.wiphy; 1839 sdata->local = local; 1840 1841 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1842 skb_queue_head_init(&sdata->fragments[i].skb_list); 1843 1844 INIT_LIST_HEAD(&sdata->key_list); 1845 1846 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1847 ieee80211_dfs_cac_timer_work); 1848 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1849 ieee80211_delayed_tailroom_dec); 1850 1851 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1852 struct ieee80211_supported_band *sband; 1853 sband = local->hw.wiphy->bands[i]; 1854 sdata->rc_rateidx_mask[i] = 1855 sband ? (1 << sband->n_bitrates) - 1 : 0; 1856 if (sband) { 1857 __le16 cap; 1858 u16 *vht_rate_mask; 1859 1860 memcpy(sdata->rc_rateidx_mcs_mask[i], 1861 sband->ht_cap.mcs.rx_mask, 1862 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1863 1864 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1865 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1866 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1867 } else { 1868 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1869 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1870 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1871 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1872 } 1873 } 1874 1875 ieee80211_set_default_queues(sdata); 1876 1877 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1878 sdata->user_power_level = local->user_power_level; 1879 1880 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1881 1882 /* setup type-dependent data */ 1883 ieee80211_setup_sdata(sdata, type); 1884 1885 if (ndev) { 1886 if (params) { 1887 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1888 if (type == NL80211_IFTYPE_STATION) 1889 sdata->u.mgd.use_4addr = params->use_4addr; 1890 } 1891 1892 ndev->features |= local->hw.netdev_features; 1893 1894 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1895 1896 /* MTU range: 256 - 2304 */ 1897 ndev->min_mtu = 256; 1898 ndev->max_mtu = IEEE80211_MAX_DATA_LEN; 1899 1900 ret = register_netdevice(ndev); 1901 if (ret) { 1902 free_netdev(ndev); 1903 return ret; 1904 } 1905 } 1906 1907 mutex_lock(&local->iflist_mtx); 1908 list_add_tail_rcu(&sdata->list, &local->interfaces); 1909 mutex_unlock(&local->iflist_mtx); 1910 1911 if (new_wdev) 1912 *new_wdev = &sdata->wdev; 1913 1914 return 0; 1915 } 1916 1917 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1918 { 1919 ASSERT_RTNL(); 1920 1921 mutex_lock(&sdata->local->iflist_mtx); 1922 list_del_rcu(&sdata->list); 1923 mutex_unlock(&sdata->local->iflist_mtx); 1924 1925 synchronize_rcu(); 1926 1927 if (sdata->dev) { 1928 unregister_netdevice(sdata->dev); 1929 } else { 1930 cfg80211_unregister_wdev(&sdata->wdev); 1931 ieee80211_teardown_sdata(sdata); 1932 kfree(sdata); 1933 } 1934 } 1935 1936 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1937 { 1938 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1939 return; 1940 ieee80211_do_stop(sdata, true); 1941 } 1942 1943 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1944 { 1945 struct ieee80211_sub_if_data *sdata, *tmp; 1946 LIST_HEAD(unreg_list); 1947 LIST_HEAD(wdev_list); 1948 1949 ASSERT_RTNL(); 1950 1951 /* Before destroying the interfaces, make sure they're all stopped so 1952 * that the hardware is stopped. Otherwise, the driver might still be 1953 * iterating the interfaces during the shutdown, e.g. from a worker 1954 * or from RX processing or similar, and if it does so (using atomic 1955 * iteration) while we're manipulating the list, the iteration will 1956 * crash. 1957 * 1958 * After this, the hardware should be stopped and the driver should 1959 * have stopped all of its activities, so that we can do RCU-unaware 1960 * manipulations of the interface list below. 1961 */ 1962 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1963 1964 WARN(local->open_count, "%s: open count remains %d\n", 1965 wiphy_name(local->hw.wiphy), local->open_count); 1966 1967 mutex_lock(&local->iflist_mtx); 1968 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1969 list_del(&sdata->list); 1970 1971 if (sdata->dev) 1972 unregister_netdevice_queue(sdata->dev, &unreg_list); 1973 else 1974 list_add(&sdata->list, &wdev_list); 1975 } 1976 mutex_unlock(&local->iflist_mtx); 1977 unregister_netdevice_many(&unreg_list); 1978 1979 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 1980 list_del(&sdata->list); 1981 cfg80211_unregister_wdev(&sdata->wdev); 1982 kfree(sdata); 1983 } 1984 } 1985 1986 static int netdev_notify(struct notifier_block *nb, 1987 unsigned long state, void *ptr) 1988 { 1989 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1990 struct ieee80211_sub_if_data *sdata; 1991 1992 if (state != NETDEV_CHANGENAME) 1993 return NOTIFY_DONE; 1994 1995 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1996 return NOTIFY_DONE; 1997 1998 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1999 return NOTIFY_DONE; 2000 2001 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2002 memcpy(sdata->name, dev->name, IFNAMSIZ); 2003 ieee80211_debugfs_rename_netdev(sdata); 2004 2005 return NOTIFY_OK; 2006 } 2007 2008 static struct notifier_block mac80211_netdev_notifier = { 2009 .notifier_call = netdev_notify, 2010 }; 2011 2012 int ieee80211_iface_init(void) 2013 { 2014 return register_netdevice_notifier(&mac80211_netdev_notifier); 2015 } 2016 2017 void ieee80211_iface_exit(void) 2018 { 2019 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2020 } 2021 2022 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2023 { 2024 if (sdata->vif.type == NL80211_IFTYPE_AP) 2025 atomic_inc(&sdata->u.ap.num_mcast_sta); 2026 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2027 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2028 } 2029 2030 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2031 { 2032 if (sdata->vif.type == NL80211_IFTYPE_AP) 2033 atomic_dec(&sdata->u.ap.num_mcast_sta); 2034 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2035 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2036 } 2037