1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Interface handling 4 * 5 * Copyright 2002-2005, Instant802 Networks, Inc. 6 * Copyright 2005-2006, Devicescape Software, Inc. 7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (c) 2016 Intel Deutschland GmbH 11 * Copyright (C) 2018-2020 Intel Corporation 12 */ 13 #include <linux/slab.h> 14 #include <linux/kernel.h> 15 #include <linux/if_arp.h> 16 #include <linux/netdevice.h> 17 #include <linux/rtnetlink.h> 18 #include <net/mac80211.h> 19 #include <net/ieee80211_radiotap.h> 20 #include "ieee80211_i.h" 21 #include "sta_info.h" 22 #include "debugfs_netdev.h" 23 #include "mesh.h" 24 #include "led.h" 25 #include "driver-ops.h" 26 #include "wme.h" 27 #include "rate.h" 28 29 /** 30 * DOC: Interface list locking 31 * 32 * The interface list in each struct ieee80211_local is protected 33 * three-fold: 34 * 35 * (1) modifications may only be done under the RTNL 36 * (2) modifications and readers are protected against each other by 37 * the iflist_mtx. 38 * (3) modifications are done in an RCU manner so atomic readers 39 * can traverse the list in RCU-safe blocks. 40 * 41 * As a consequence, reads (traversals) of the list can be protected 42 * by either the RTNL, the iflist_mtx or RCU. 43 */ 44 45 static void ieee80211_iface_work(struct work_struct *work); 46 47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 48 { 49 struct ieee80211_chanctx_conf *chanctx_conf; 50 int power; 51 52 rcu_read_lock(); 53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 54 if (!chanctx_conf) { 55 rcu_read_unlock(); 56 return false; 57 } 58 59 power = ieee80211_chandef_max_power(&chanctx_conf->def); 60 rcu_read_unlock(); 61 62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 63 power = min(power, sdata->user_power_level); 64 65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 66 power = min(power, sdata->ap_power_level); 67 68 if (power != sdata->vif.bss_conf.txpower) { 69 sdata->vif.bss_conf.txpower = power; 70 ieee80211_hw_config(sdata->local, 0); 71 return true; 72 } 73 74 return false; 75 } 76 77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 78 bool update_bss) 79 { 80 if (__ieee80211_recalc_txpower(sdata) || 81 (update_bss && ieee80211_sdata_running(sdata))) 82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 83 } 84 85 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 86 { 87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 88 return 0; 89 90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 91 return IEEE80211_CONF_CHANGE_IDLE; 92 } 93 94 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 95 { 96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 97 return 0; 98 99 ieee80211_flush_queues(local, NULL, false); 100 101 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 102 return IEEE80211_CONF_CHANGE_IDLE; 103 } 104 105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 106 bool force_active) 107 { 108 bool working, scanning, active; 109 unsigned int led_trig_start = 0, led_trig_stop = 0; 110 111 lockdep_assert_held(&local->mtx); 112 113 active = force_active || 114 !list_empty(&local->chanctx_list) || 115 local->monitors; 116 117 working = !local->ops->remain_on_channel && 118 !list_empty(&local->roc_list); 119 120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 122 123 if (working || scanning) 124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 125 else 126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 127 128 if (active) 129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 130 else 131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 132 133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 134 135 if (working || scanning || active) 136 return __ieee80211_idle_off(local); 137 return __ieee80211_idle_on(local); 138 } 139 140 u32 ieee80211_idle_off(struct ieee80211_local *local) 141 { 142 return __ieee80211_recalc_idle(local, true); 143 } 144 145 void ieee80211_recalc_idle(struct ieee80211_local *local) 146 { 147 u32 change = __ieee80211_recalc_idle(local, false); 148 if (change) 149 ieee80211_hw_config(local, change); 150 } 151 152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 153 bool check_dup) 154 { 155 struct ieee80211_local *local = sdata->local; 156 struct ieee80211_sub_if_data *iter; 157 u64 new, mask, tmp; 158 u8 *m; 159 int ret = 0; 160 161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 162 return 0; 163 164 m = addr; 165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 168 169 m = local->hw.wiphy->addr_mask; 170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 173 174 if (!check_dup) 175 return ret; 176 177 mutex_lock(&local->iflist_mtx); 178 list_for_each_entry(iter, &local->interfaces, list) { 179 if (iter == sdata) 180 continue; 181 182 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 184 continue; 185 186 m = iter->vif.addr; 187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 190 191 if ((new & ~mask) != (tmp & ~mask)) { 192 ret = -EINVAL; 193 break; 194 } 195 } 196 mutex_unlock(&local->iflist_mtx); 197 198 return ret; 199 } 200 201 static int ieee80211_change_mac(struct net_device *dev, void *addr) 202 { 203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 204 struct sockaddr *sa = addr; 205 bool check_dup = true; 206 int ret; 207 208 if (ieee80211_sdata_running(sdata)) 209 return -EBUSY; 210 211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 213 check_dup = false; 214 215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 216 if (ret) 217 return ret; 218 219 ret = eth_mac_addr(dev, sa); 220 221 if (ret == 0) 222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 223 224 return ret; 225 } 226 227 static inline int identical_mac_addr_allowed(int type1, int type2) 228 { 229 return type1 == NL80211_IFTYPE_MONITOR || 230 type2 == NL80211_IFTYPE_MONITOR || 231 type1 == NL80211_IFTYPE_P2P_DEVICE || 232 type2 == NL80211_IFTYPE_P2P_DEVICE || 233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 234 (type1 == NL80211_IFTYPE_WDS && 235 (type2 == NL80211_IFTYPE_WDS || 236 type2 == NL80211_IFTYPE_AP)) || 237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 238 (type1 == NL80211_IFTYPE_AP_VLAN && 239 (type2 == NL80211_IFTYPE_AP || 240 type2 == NL80211_IFTYPE_AP_VLAN)); 241 } 242 243 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 244 enum nl80211_iftype iftype) 245 { 246 struct ieee80211_local *local = sdata->local; 247 struct ieee80211_sub_if_data *nsdata; 248 int ret; 249 250 ASSERT_RTNL(); 251 252 /* we hold the RTNL here so can safely walk the list */ 253 list_for_each_entry(nsdata, &local->interfaces, list) { 254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 255 /* 256 * Only OCB and monitor mode may coexist 257 */ 258 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 260 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 261 nsdata->vif.type == NL80211_IFTYPE_OCB)) 262 return -EBUSY; 263 264 /* 265 * Allow only a single IBSS interface to be up at any 266 * time. This is restricted because beacon distribution 267 * cannot work properly if both are in the same IBSS. 268 * 269 * To remove this restriction we'd have to disallow them 270 * from setting the same SSID on different IBSS interfaces 271 * belonging to the same hardware. Then, however, we're 272 * faced with having to adopt two different TSF timers... 273 */ 274 if (iftype == NL80211_IFTYPE_ADHOC && 275 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 276 return -EBUSY; 277 /* 278 * will not add another interface while any channel 279 * switch is active. 280 */ 281 if (nsdata->vif.csa_active) 282 return -EBUSY; 283 284 /* 285 * The remaining checks are only performed for interfaces 286 * with the same MAC address. 287 */ 288 if (!ether_addr_equal(sdata->vif.addr, 289 nsdata->vif.addr)) 290 continue; 291 292 /* 293 * check whether it may have the same address 294 */ 295 if (!identical_mac_addr_allowed(iftype, 296 nsdata->vif.type)) 297 return -ENOTUNIQ; 298 299 /* 300 * can only add VLANs to enabled APs 301 */ 302 if (iftype == NL80211_IFTYPE_AP_VLAN && 303 nsdata->vif.type == NL80211_IFTYPE_AP) 304 sdata->bss = &nsdata->u.ap; 305 } 306 } 307 308 mutex_lock(&local->chanctx_mtx); 309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 310 mutex_unlock(&local->chanctx_mtx); 311 return ret; 312 } 313 314 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 315 enum nl80211_iftype iftype) 316 { 317 int n_queues = sdata->local->hw.queues; 318 int i; 319 320 if (iftype == NL80211_IFTYPE_NAN) 321 return 0; 322 323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 324 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 326 IEEE80211_INVAL_HW_QUEUE)) 327 return -EINVAL; 328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 329 n_queues)) 330 return -EINVAL; 331 } 332 } 333 334 if ((iftype != NL80211_IFTYPE_AP && 335 iftype != NL80211_IFTYPE_P2P_GO && 336 iftype != NL80211_IFTYPE_MESH_POINT) || 337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 339 return 0; 340 } 341 342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 343 return -EINVAL; 344 345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 346 return -EINVAL; 347 348 return 0; 349 } 350 351 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 352 const int offset) 353 { 354 struct ieee80211_local *local = sdata->local; 355 u32 flags = sdata->u.mntr.flags; 356 357 #define ADJUST(_f, _s) do { \ 358 if (flags & MONITOR_FLAG_##_f) \ 359 local->fif_##_s += offset; \ 360 } while (0) 361 362 ADJUST(FCSFAIL, fcsfail); 363 ADJUST(PLCPFAIL, plcpfail); 364 ADJUST(CONTROL, control); 365 ADJUST(CONTROL, pspoll); 366 ADJUST(OTHER_BSS, other_bss); 367 368 #undef ADJUST 369 } 370 371 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 372 { 373 struct ieee80211_local *local = sdata->local; 374 int i; 375 376 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 377 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 378 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 379 else if (local->hw.queues >= IEEE80211_NUM_ACS) 380 sdata->vif.hw_queue[i] = i; 381 else 382 sdata->vif.hw_queue[i] = 0; 383 } 384 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 385 } 386 387 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 388 { 389 struct ieee80211_sub_if_data *sdata; 390 int ret; 391 392 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 393 return 0; 394 395 ASSERT_RTNL(); 396 397 if (local->monitor_sdata) 398 return 0; 399 400 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 401 if (!sdata) 402 return -ENOMEM; 403 404 /* set up data */ 405 sdata->local = local; 406 sdata->vif.type = NL80211_IFTYPE_MONITOR; 407 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 408 wiphy_name(local->hw.wiphy)); 409 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 410 411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 412 413 ieee80211_set_default_queues(sdata); 414 415 ret = drv_add_interface(local, sdata); 416 if (WARN_ON(ret)) { 417 /* ok .. stupid driver, it asked for this! */ 418 kfree(sdata); 419 return ret; 420 } 421 422 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 423 if (ret) { 424 kfree(sdata); 425 return ret; 426 } 427 428 mutex_lock(&local->iflist_mtx); 429 rcu_assign_pointer(local->monitor_sdata, sdata); 430 mutex_unlock(&local->iflist_mtx); 431 432 mutex_lock(&local->mtx); 433 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 434 IEEE80211_CHANCTX_EXCLUSIVE); 435 mutex_unlock(&local->mtx); 436 if (ret) { 437 mutex_lock(&local->iflist_mtx); 438 RCU_INIT_POINTER(local->monitor_sdata, NULL); 439 mutex_unlock(&local->iflist_mtx); 440 synchronize_net(); 441 drv_remove_interface(local, sdata); 442 kfree(sdata); 443 return ret; 444 } 445 446 skb_queue_head_init(&sdata->skb_queue); 447 INIT_WORK(&sdata->work, ieee80211_iface_work); 448 449 return 0; 450 } 451 452 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 453 { 454 struct ieee80211_sub_if_data *sdata; 455 456 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 457 return; 458 459 ASSERT_RTNL(); 460 461 mutex_lock(&local->iflist_mtx); 462 463 sdata = rcu_dereference_protected(local->monitor_sdata, 464 lockdep_is_held(&local->iflist_mtx)); 465 if (!sdata) { 466 mutex_unlock(&local->iflist_mtx); 467 return; 468 } 469 470 RCU_INIT_POINTER(local->monitor_sdata, NULL); 471 mutex_unlock(&local->iflist_mtx); 472 473 synchronize_net(); 474 475 mutex_lock(&local->mtx); 476 ieee80211_vif_release_channel(sdata); 477 mutex_unlock(&local->mtx); 478 479 drv_remove_interface(local, sdata); 480 481 kfree(sdata); 482 } 483 484 /* 485 * NOTE: Be very careful when changing this function, it must NOT return 486 * an error on interface type changes that have been pre-checked, so most 487 * checks should be in ieee80211_check_concurrent_iface. 488 */ 489 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 490 { 491 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 492 struct net_device *dev = wdev->netdev; 493 struct ieee80211_local *local = sdata->local; 494 struct sta_info *sta; 495 u32 changed = 0; 496 int res; 497 u32 hw_reconf_flags = 0; 498 499 switch (sdata->vif.type) { 500 case NL80211_IFTYPE_WDS: 501 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 502 return -ENOLINK; 503 break; 504 case NL80211_IFTYPE_AP_VLAN: { 505 struct ieee80211_sub_if_data *master; 506 507 if (!sdata->bss) 508 return -ENOLINK; 509 510 mutex_lock(&local->mtx); 511 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 512 mutex_unlock(&local->mtx); 513 514 master = container_of(sdata->bss, 515 struct ieee80211_sub_if_data, u.ap); 516 sdata->control_port_protocol = 517 master->control_port_protocol; 518 sdata->control_port_no_encrypt = 519 master->control_port_no_encrypt; 520 sdata->control_port_over_nl80211 = 521 master->control_port_over_nl80211; 522 sdata->control_port_no_preauth = 523 master->control_port_no_preauth; 524 sdata->vif.cab_queue = master->vif.cab_queue; 525 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 526 sizeof(sdata->vif.hw_queue)); 527 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 528 529 mutex_lock(&local->key_mtx); 530 sdata->crypto_tx_tailroom_needed_cnt += 531 master->crypto_tx_tailroom_needed_cnt; 532 mutex_unlock(&local->key_mtx); 533 534 break; 535 } 536 case NL80211_IFTYPE_AP: 537 sdata->bss = &sdata->u.ap; 538 break; 539 case NL80211_IFTYPE_MESH_POINT: 540 case NL80211_IFTYPE_STATION: 541 case NL80211_IFTYPE_MONITOR: 542 case NL80211_IFTYPE_ADHOC: 543 case NL80211_IFTYPE_P2P_DEVICE: 544 case NL80211_IFTYPE_OCB: 545 case NL80211_IFTYPE_NAN: 546 /* no special treatment */ 547 break; 548 case NL80211_IFTYPE_UNSPECIFIED: 549 case NUM_NL80211_IFTYPES: 550 case NL80211_IFTYPE_P2P_CLIENT: 551 case NL80211_IFTYPE_P2P_GO: 552 /* cannot happen */ 553 WARN_ON(1); 554 break; 555 } 556 557 if (local->open_count == 0) { 558 res = drv_start(local); 559 if (res) 560 goto err_del_bss; 561 /* we're brought up, everything changes */ 562 hw_reconf_flags = ~0; 563 ieee80211_led_radio(local, true); 564 ieee80211_mod_tpt_led_trig(local, 565 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 566 } 567 568 /* 569 * Copy the hopefully now-present MAC address to 570 * this interface, if it has the special null one. 571 */ 572 if (dev && is_zero_ether_addr(dev->dev_addr)) { 573 memcpy(dev->dev_addr, 574 local->hw.wiphy->perm_addr, 575 ETH_ALEN); 576 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 577 578 if (!is_valid_ether_addr(dev->dev_addr)) { 579 res = -EADDRNOTAVAIL; 580 goto err_stop; 581 } 582 } 583 584 switch (sdata->vif.type) { 585 case NL80211_IFTYPE_AP_VLAN: 586 /* no need to tell driver, but set carrier and chanctx */ 587 if (rtnl_dereference(sdata->bss->beacon)) { 588 ieee80211_vif_vlan_copy_chanctx(sdata); 589 netif_carrier_on(dev); 590 } else { 591 netif_carrier_off(dev); 592 } 593 break; 594 case NL80211_IFTYPE_MONITOR: 595 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 596 local->cooked_mntrs++; 597 break; 598 } 599 600 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 601 res = drv_add_interface(local, sdata); 602 if (res) 603 goto err_stop; 604 } else if (local->monitors == 0 && local->open_count == 0) { 605 res = ieee80211_add_virtual_monitor(local); 606 if (res) 607 goto err_stop; 608 } 609 610 /* must be before the call to ieee80211_configure_filter */ 611 local->monitors++; 612 if (local->monitors == 1) { 613 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 614 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 615 } 616 617 ieee80211_adjust_monitor_flags(sdata, 1); 618 ieee80211_configure_filter(local); 619 mutex_lock(&local->mtx); 620 ieee80211_recalc_idle(local); 621 mutex_unlock(&local->mtx); 622 623 netif_carrier_on(dev); 624 break; 625 default: 626 if (coming_up) { 627 ieee80211_del_virtual_monitor(local); 628 629 res = drv_add_interface(local, sdata); 630 if (res) 631 goto err_stop; 632 res = ieee80211_check_queues(sdata, 633 ieee80211_vif_type_p2p(&sdata->vif)); 634 if (res) 635 goto err_del_interface; 636 } 637 638 if (sdata->vif.type == NL80211_IFTYPE_AP) { 639 local->fif_pspoll++; 640 local->fif_probe_req++; 641 642 ieee80211_configure_filter(local); 643 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 644 local->fif_probe_req++; 645 } 646 647 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 648 sdata->vif.type != NL80211_IFTYPE_NAN) 649 changed |= ieee80211_reset_erp_info(sdata); 650 ieee80211_bss_info_change_notify(sdata, changed); 651 652 switch (sdata->vif.type) { 653 case NL80211_IFTYPE_STATION: 654 case NL80211_IFTYPE_ADHOC: 655 case NL80211_IFTYPE_AP: 656 case NL80211_IFTYPE_MESH_POINT: 657 case NL80211_IFTYPE_OCB: 658 netif_carrier_off(dev); 659 break; 660 case NL80211_IFTYPE_WDS: 661 case NL80211_IFTYPE_P2P_DEVICE: 662 case NL80211_IFTYPE_NAN: 663 break; 664 default: 665 /* not reached */ 666 WARN_ON(1); 667 } 668 669 /* 670 * Set default queue parameters so drivers don't 671 * need to initialise the hardware if the hardware 672 * doesn't start up with sane defaults. 673 * Enable QoS for anything but station interfaces. 674 */ 675 ieee80211_set_wmm_default(sdata, true, 676 sdata->vif.type != NL80211_IFTYPE_STATION); 677 } 678 679 set_bit(SDATA_STATE_RUNNING, &sdata->state); 680 681 switch (sdata->vif.type) { 682 case NL80211_IFTYPE_WDS: 683 /* Create STA entry for the WDS peer */ 684 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 685 GFP_KERNEL); 686 if (!sta) { 687 res = -ENOMEM; 688 goto err_del_interface; 689 } 690 691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 692 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 693 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 694 695 res = sta_info_insert(sta); 696 if (res) { 697 /* STA has been freed */ 698 goto err_del_interface; 699 } 700 701 rate_control_rate_init(sta); 702 netif_carrier_on(dev); 703 break; 704 case NL80211_IFTYPE_P2P_DEVICE: 705 rcu_assign_pointer(local->p2p_sdata, sdata); 706 break; 707 case NL80211_IFTYPE_MONITOR: 708 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 709 break; 710 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 711 break; 712 default: 713 break; 714 } 715 716 /* 717 * set_multicast_list will be invoked by the networking core 718 * which will check whether any increments here were done in 719 * error and sync them down to the hardware as filter flags. 720 */ 721 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 722 atomic_inc(&local->iff_allmultis); 723 724 if (coming_up) 725 local->open_count++; 726 727 if (hw_reconf_flags) 728 ieee80211_hw_config(local, hw_reconf_flags); 729 730 ieee80211_recalc_ps(local); 731 732 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 733 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 734 local->ops->wake_tx_queue) { 735 /* XXX: for AP_VLAN, actually track AP queues */ 736 if (dev) 737 netif_tx_start_all_queues(dev); 738 } else if (dev) { 739 unsigned long flags; 740 int n_acs = IEEE80211_NUM_ACS; 741 int ac; 742 743 if (local->hw.queues < IEEE80211_NUM_ACS) 744 n_acs = 1; 745 746 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 747 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 748 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 749 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 750 for (ac = 0; ac < n_acs; ac++) { 751 int ac_queue = sdata->vif.hw_queue[ac]; 752 753 if (local->queue_stop_reasons[ac_queue] == 0 && 754 skb_queue_empty(&local->pending[ac_queue])) 755 netif_start_subqueue(dev, ac); 756 } 757 } 758 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 759 } 760 761 return 0; 762 err_del_interface: 763 drv_remove_interface(local, sdata); 764 err_stop: 765 if (!local->open_count) 766 drv_stop(local); 767 err_del_bss: 768 sdata->bss = NULL; 769 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 770 mutex_lock(&local->mtx); 771 list_del(&sdata->u.vlan.list); 772 mutex_unlock(&local->mtx); 773 } 774 /* might already be clear but that doesn't matter */ 775 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 776 return res; 777 } 778 779 static int ieee80211_open(struct net_device *dev) 780 { 781 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 782 int err; 783 784 /* fail early if user set an invalid address */ 785 if (!is_valid_ether_addr(dev->dev_addr)) 786 return -EADDRNOTAVAIL; 787 788 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 789 if (err) 790 return err; 791 792 return ieee80211_do_open(&sdata->wdev, true); 793 } 794 795 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 796 bool going_down) 797 { 798 struct ieee80211_local *local = sdata->local; 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_MONITOR: 830 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 831 break; 832 list_del_rcu(&sdata->u.mntr.list); 833 break; 834 default: 835 break; 836 } 837 838 /* 839 * Remove all stations associated with this interface. 840 * 841 * This must be done before calling ops->remove_interface() 842 * because otherwise we can later invoke ops->sta_notify() 843 * whenever the STAs are removed, and that invalidates driver 844 * assumptions about always getting a vif pointer that is valid 845 * (because if we remove a STA after ops->remove_interface() 846 * the driver will have removed the vif info already!) 847 * 848 * In WDS mode a station must exist here and be flushed, for 849 * AP_VLANs stations may exist since there's nothing else that 850 * would have removed them, but in other modes there shouldn't 851 * be any stations. 852 */ 853 flushed = sta_info_flush(sdata); 854 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 855 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 856 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 857 858 /* don't count this interface for allmulti while it is down */ 859 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 860 atomic_dec(&local->iff_allmultis); 861 862 if (sdata->vif.type == NL80211_IFTYPE_AP) { 863 local->fif_pspoll--; 864 local->fif_probe_req--; 865 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 866 local->fif_probe_req--; 867 } 868 869 if (sdata->dev) { 870 netif_addr_lock_bh(sdata->dev); 871 spin_lock_bh(&local->filter_lock); 872 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 873 sdata->dev->addr_len); 874 spin_unlock_bh(&local->filter_lock); 875 netif_addr_unlock_bh(sdata->dev); 876 } 877 878 del_timer_sync(&local->dynamic_ps_timer); 879 cancel_work_sync(&local->dynamic_ps_enable_work); 880 881 cancel_work_sync(&sdata->recalc_smps); 882 sdata_lock(sdata); 883 mutex_lock(&local->mtx); 884 sdata->vif.csa_active = false; 885 if (sdata->vif.type == NL80211_IFTYPE_STATION) 886 sdata->u.mgd.csa_waiting_bcn = false; 887 if (sdata->csa_block_tx) { 888 ieee80211_wake_vif_queues(local, sdata, 889 IEEE80211_QUEUE_STOP_REASON_CSA); 890 sdata->csa_block_tx = false; 891 } 892 mutex_unlock(&local->mtx); 893 sdata_unlock(sdata); 894 895 cancel_work_sync(&sdata->csa_finalize_work); 896 897 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 898 899 if (sdata->wdev.cac_started) { 900 chandef = sdata->vif.bss_conf.chandef; 901 WARN_ON(local->suspended); 902 mutex_lock(&local->mtx); 903 ieee80211_vif_release_channel(sdata); 904 mutex_unlock(&local->mtx); 905 cfg80211_cac_event(sdata->dev, &chandef, 906 NL80211_RADAR_CAC_ABORTED, 907 GFP_KERNEL); 908 } 909 910 /* APs need special treatment */ 911 if (sdata->vif.type == NL80211_IFTYPE_AP) { 912 struct ieee80211_sub_if_data *vlan, *tmpsdata; 913 914 /* down all dependent devices, that is VLANs */ 915 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 916 u.vlan.list) 917 dev_close(vlan->dev); 918 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 919 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 920 /* remove all packets in parent bc_buf pointing to this dev */ 921 ps = &sdata->bss->ps; 922 923 spin_lock_irqsave(&ps->bc_buf.lock, flags); 924 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 925 if (skb->dev == sdata->dev) { 926 __skb_unlink(skb, &ps->bc_buf); 927 local->total_ps_buffered--; 928 ieee80211_free_txskb(&local->hw, skb); 929 } 930 } 931 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 932 } 933 934 if (going_down) 935 local->open_count--; 936 937 switch (sdata->vif.type) { 938 case NL80211_IFTYPE_AP_VLAN: 939 mutex_lock(&local->mtx); 940 list_del(&sdata->u.vlan.list); 941 mutex_unlock(&local->mtx); 942 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 943 /* see comment in the default case below */ 944 ieee80211_free_keys(sdata, true); 945 /* no need to tell driver */ 946 break; 947 case NL80211_IFTYPE_MONITOR: 948 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 949 local->cooked_mntrs--; 950 break; 951 } 952 953 local->monitors--; 954 if (local->monitors == 0) { 955 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 956 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 957 } 958 959 ieee80211_adjust_monitor_flags(sdata, -1); 960 break; 961 case NL80211_IFTYPE_NAN: 962 /* clean all the functions */ 963 spin_lock_bh(&sdata->u.nan.func_lock); 964 965 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 966 idr_remove(&sdata->u.nan.function_inst_ids, i); 967 cfg80211_free_nan_func(func); 968 } 969 idr_destroy(&sdata->u.nan.function_inst_ids); 970 971 spin_unlock_bh(&sdata->u.nan.func_lock); 972 break; 973 case NL80211_IFTYPE_P2P_DEVICE: 974 /* relies on synchronize_rcu() below */ 975 RCU_INIT_POINTER(local->p2p_sdata, NULL); 976 /* fall through */ 977 default: 978 cancel_work_sync(&sdata->work); 979 /* 980 * When we get here, the interface is marked down. 981 * Free the remaining keys, if there are any 982 * (which can happen in AP mode if userspace sets 983 * keys before the interface is operating, and maybe 984 * also in WDS mode) 985 * 986 * Force the key freeing to always synchronize_net() 987 * to wait for the RX path in case it is using this 988 * interface enqueuing frames at this very time on 989 * another CPU. 990 */ 991 ieee80211_free_keys(sdata, true); 992 skb_queue_purge(&sdata->skb_queue); 993 } 994 995 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 996 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 997 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 998 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 999 if (info->control.vif == &sdata->vif) { 1000 __skb_unlink(skb, &local->pending[i]); 1001 ieee80211_free_txskb(&local->hw, skb); 1002 } 1003 } 1004 } 1005 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1006 1007 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1008 ieee80211_txq_remove_vlan(local, sdata); 1009 1010 sdata->bss = NULL; 1011 1012 if (local->open_count == 0) 1013 ieee80211_clear_tx_pending(local); 1014 1015 sdata->vif.bss_conf.beacon_int = 0; 1016 1017 /* 1018 * If the interface goes down while suspended, presumably because 1019 * the device was unplugged and that happens before our resume, 1020 * then the driver is already unconfigured and the remainder of 1021 * this function isn't needed. 1022 * XXX: what about WoWLAN? If the device has software state, e.g. 1023 * memory allocated, it might expect teardown commands from 1024 * mac80211 here? 1025 */ 1026 if (local->suspended) { 1027 WARN_ON(local->wowlan); 1028 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1029 return; 1030 } 1031 1032 switch (sdata->vif.type) { 1033 case NL80211_IFTYPE_AP_VLAN: 1034 break; 1035 case NL80211_IFTYPE_MONITOR: 1036 if (local->monitors == 0) 1037 ieee80211_del_virtual_monitor(local); 1038 1039 mutex_lock(&local->mtx); 1040 ieee80211_recalc_idle(local); 1041 mutex_unlock(&local->mtx); 1042 1043 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1044 break; 1045 1046 /* fall through */ 1047 default: 1048 if (going_down) 1049 drv_remove_interface(local, sdata); 1050 } 1051 1052 ieee80211_recalc_ps(local); 1053 1054 if (cancel_scan) 1055 flush_delayed_work(&local->scan_work); 1056 1057 if (local->open_count == 0) { 1058 ieee80211_stop_device(local); 1059 1060 /* no reconfiguring after stop! */ 1061 return; 1062 } 1063 1064 /* do after stop to avoid reconfiguring when we stop anyway */ 1065 ieee80211_configure_filter(local); 1066 ieee80211_hw_config(local, hw_reconf_flags); 1067 1068 if (local->monitors == local->open_count) 1069 ieee80211_add_virtual_monitor(local); 1070 } 1071 1072 static int ieee80211_stop(struct net_device *dev) 1073 { 1074 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1075 1076 ieee80211_do_stop(sdata, true); 1077 1078 return 0; 1079 } 1080 1081 static void ieee80211_set_multicast_list(struct net_device *dev) 1082 { 1083 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1084 struct ieee80211_local *local = sdata->local; 1085 int allmulti, sdata_allmulti; 1086 1087 allmulti = !!(dev->flags & IFF_ALLMULTI); 1088 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1089 1090 if (allmulti != sdata_allmulti) { 1091 if (dev->flags & IFF_ALLMULTI) 1092 atomic_inc(&local->iff_allmultis); 1093 else 1094 atomic_dec(&local->iff_allmultis); 1095 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1096 } 1097 1098 spin_lock_bh(&local->filter_lock); 1099 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1100 spin_unlock_bh(&local->filter_lock); 1101 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1102 } 1103 1104 /* 1105 * Called when the netdev is removed or, by the code below, before 1106 * the interface type changes. 1107 */ 1108 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1109 { 1110 int i; 1111 1112 /* free extra data */ 1113 ieee80211_free_keys(sdata, false); 1114 1115 ieee80211_debugfs_remove_netdev(sdata); 1116 1117 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1118 __skb_queue_purge(&sdata->fragments[i].skb_list); 1119 sdata->fragment_next = 0; 1120 1121 if (ieee80211_vif_is_mesh(&sdata->vif)) 1122 ieee80211_mesh_teardown_sdata(sdata); 1123 } 1124 1125 static void ieee80211_uninit(struct net_device *dev) 1126 { 1127 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1128 } 1129 1130 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1131 struct sk_buff *skb, 1132 struct net_device *sb_dev) 1133 { 1134 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1135 } 1136 1137 static void 1138 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1139 { 1140 int i; 1141 1142 for_each_possible_cpu(i) { 1143 const struct pcpu_sw_netstats *tstats; 1144 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1145 unsigned int start; 1146 1147 tstats = per_cpu_ptr(dev->tstats, i); 1148 1149 do { 1150 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1151 rx_packets = tstats->rx_packets; 1152 tx_packets = tstats->tx_packets; 1153 rx_bytes = tstats->rx_bytes; 1154 tx_bytes = tstats->tx_bytes; 1155 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1156 1157 stats->rx_packets += rx_packets; 1158 stats->tx_packets += tx_packets; 1159 stats->rx_bytes += rx_bytes; 1160 stats->tx_bytes += tx_bytes; 1161 } 1162 } 1163 1164 static const struct net_device_ops ieee80211_dataif_ops = { 1165 .ndo_open = ieee80211_open, 1166 .ndo_stop = ieee80211_stop, 1167 .ndo_uninit = ieee80211_uninit, 1168 .ndo_start_xmit = ieee80211_subif_start_xmit, 1169 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1170 .ndo_set_mac_address = ieee80211_change_mac, 1171 .ndo_select_queue = ieee80211_netdev_select_queue, 1172 .ndo_get_stats64 = ieee80211_get_stats64, 1173 }; 1174 1175 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1176 struct sk_buff *skb, 1177 struct net_device *sb_dev) 1178 { 1179 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1180 struct ieee80211_local *local = sdata->local; 1181 struct ieee80211_hdr *hdr; 1182 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1183 1184 if (local->hw.queues < IEEE80211_NUM_ACS) 1185 return 0; 1186 1187 if (skb->len < 4 || 1188 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1189 return 0; /* doesn't matter, frame will be dropped */ 1190 1191 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1192 1193 return ieee80211_select_queue_80211(sdata, skb, hdr); 1194 } 1195 1196 static const struct net_device_ops ieee80211_monitorif_ops = { 1197 .ndo_open = ieee80211_open, 1198 .ndo_stop = ieee80211_stop, 1199 .ndo_uninit = ieee80211_uninit, 1200 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1201 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1202 .ndo_set_mac_address = ieee80211_change_mac, 1203 .ndo_select_queue = ieee80211_monitor_select_queue, 1204 .ndo_get_stats64 = ieee80211_get_stats64, 1205 }; 1206 1207 static const struct net_device_ops ieee80211_dataif_8023_ops = { 1208 .ndo_open = ieee80211_open, 1209 .ndo_stop = ieee80211_stop, 1210 .ndo_uninit = ieee80211_uninit, 1211 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 1212 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1213 .ndo_set_mac_address = ieee80211_change_mac, 1214 .ndo_select_queue = ieee80211_netdev_select_queue, 1215 .ndo_get_stats64 = ieee80211_get_stats64, 1216 }; 1217 1218 static void __ieee80211_set_hw_80211_encap(struct ieee80211_sub_if_data *sdata, 1219 bool enable) 1220 { 1221 sdata->dev->netdev_ops = enable ? &ieee80211_dataif_8023_ops : 1222 &ieee80211_dataif_ops; 1223 sdata->hw_80211_encap = enable; 1224 } 1225 1226 bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable) 1227 { 1228 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1229 struct ieee80211_local *local = sdata->local; 1230 struct ieee80211_sub_if_data *iter; 1231 struct ieee80211_key *key; 1232 1233 mutex_lock(&local->iflist_mtx); 1234 list_for_each_entry(iter, &local->interfaces, list) { 1235 struct ieee80211_sub_if_data *disable = NULL; 1236 1237 if (vif->type == NL80211_IFTYPE_MONITOR) { 1238 disable = iter; 1239 __ieee80211_set_hw_80211_encap(iter, false); 1240 } else if (iter->vif.type == NL80211_IFTYPE_MONITOR) { 1241 disable = sdata; 1242 enable = false; 1243 } 1244 if (disable) 1245 sdata_dbg(disable, 1246 "disable hw 80211 encap due to mon co-exist\n"); 1247 } 1248 mutex_unlock(&local->iflist_mtx); 1249 1250 if (enable == sdata->hw_80211_encap) 1251 return enable; 1252 1253 if (!sdata->dev) 1254 return false; 1255 1256 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 1257 (local->hw.wiphy->frag_threshold != (u32)-1)) 1258 enable = false; 1259 1260 mutex_lock(&sdata->local->key_mtx); 1261 list_for_each_entry(key, &sdata->key_list, list) { 1262 if (key->conf.cipher == WLAN_CIPHER_SUITE_TKIP) 1263 enable = false; 1264 } 1265 mutex_unlock(&sdata->local->key_mtx); 1266 1267 __ieee80211_set_hw_80211_encap(sdata, enable); 1268 1269 return enable; 1270 } 1271 EXPORT_SYMBOL(ieee80211_set_hw_80211_encap); 1272 1273 static void ieee80211_if_free(struct net_device *dev) 1274 { 1275 free_percpu(dev->tstats); 1276 } 1277 1278 static void ieee80211_if_setup(struct net_device *dev) 1279 { 1280 ether_setup(dev); 1281 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1282 dev->netdev_ops = &ieee80211_dataif_ops; 1283 dev->needs_free_netdev = true; 1284 dev->priv_destructor = ieee80211_if_free; 1285 } 1286 1287 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1288 { 1289 ieee80211_if_setup(dev); 1290 dev->priv_flags |= IFF_NO_QUEUE; 1291 } 1292 1293 static void ieee80211_iface_work(struct work_struct *work) 1294 { 1295 struct ieee80211_sub_if_data *sdata = 1296 container_of(work, struct ieee80211_sub_if_data, work); 1297 struct ieee80211_local *local = sdata->local; 1298 struct sk_buff *skb; 1299 struct sta_info *sta; 1300 1301 if (!ieee80211_sdata_running(sdata)) 1302 return; 1303 1304 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1305 return; 1306 1307 if (!ieee80211_can_run_worker(local)) 1308 return; 1309 1310 /* first process frames */ 1311 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1312 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1313 1314 if (ieee80211_is_action(mgmt->frame_control) && 1315 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1316 int len = skb->len; 1317 1318 mutex_lock(&local->sta_mtx); 1319 sta = sta_info_get_bss(sdata, mgmt->sa); 1320 if (sta) { 1321 switch (mgmt->u.action.u.addba_req.action_code) { 1322 case WLAN_ACTION_ADDBA_REQ: 1323 ieee80211_process_addba_request( 1324 local, sta, mgmt, len); 1325 break; 1326 case WLAN_ACTION_ADDBA_RESP: 1327 ieee80211_process_addba_resp(local, sta, 1328 mgmt, len); 1329 break; 1330 case WLAN_ACTION_DELBA: 1331 ieee80211_process_delba(sdata, sta, 1332 mgmt, len); 1333 break; 1334 default: 1335 WARN_ON(1); 1336 break; 1337 } 1338 } 1339 mutex_unlock(&local->sta_mtx); 1340 } else if (ieee80211_is_action(mgmt->frame_control) && 1341 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1342 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1343 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1344 struct ieee80211_rx_status *status; 1345 enum nl80211_band band; 1346 u8 opmode; 1347 1348 status = IEEE80211_SKB_RXCB(skb); 1349 band = status->band; 1350 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1351 1352 mutex_lock(&local->sta_mtx); 1353 sta = sta_info_get_bss(sdata, mgmt->sa); 1354 1355 if (sta) 1356 ieee80211_vht_handle_opmode(sdata, sta, 1357 opmode, 1358 band); 1359 1360 mutex_unlock(&local->sta_mtx); 1361 break; 1362 } 1363 case WLAN_VHT_ACTION_GROUPID_MGMT: 1364 ieee80211_process_mu_groups(sdata, mgmt); 1365 break; 1366 default: 1367 WARN_ON(1); 1368 break; 1369 } 1370 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1371 struct ieee80211_hdr *hdr = (void *)mgmt; 1372 /* 1373 * So the frame isn't mgmt, but frame_control 1374 * is at the right place anyway, of course, so 1375 * the if statement is correct. 1376 * 1377 * Warn if we have other data frame types here, 1378 * they must not get here. 1379 */ 1380 WARN_ON(hdr->frame_control & 1381 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1382 WARN_ON(!(hdr->seq_ctrl & 1383 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1384 /* 1385 * This was a fragment of a frame, received while 1386 * a block-ack session was active. That cannot be 1387 * right, so terminate the session. 1388 */ 1389 mutex_lock(&local->sta_mtx); 1390 sta = sta_info_get_bss(sdata, mgmt->sa); 1391 if (sta) { 1392 u16 tid = ieee80211_get_tid(hdr); 1393 1394 __ieee80211_stop_rx_ba_session( 1395 sta, tid, WLAN_BACK_RECIPIENT, 1396 WLAN_REASON_QSTA_REQUIRE_SETUP, 1397 true); 1398 } 1399 mutex_unlock(&local->sta_mtx); 1400 } else switch (sdata->vif.type) { 1401 case NL80211_IFTYPE_STATION: 1402 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1403 break; 1404 case NL80211_IFTYPE_ADHOC: 1405 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1406 break; 1407 case NL80211_IFTYPE_MESH_POINT: 1408 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1409 break; 1410 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1411 break; 1412 default: 1413 WARN(1, "frame for unexpected interface type"); 1414 break; 1415 } 1416 1417 kfree_skb(skb); 1418 } 1419 1420 /* then other type-dependent work */ 1421 switch (sdata->vif.type) { 1422 case NL80211_IFTYPE_STATION: 1423 ieee80211_sta_work(sdata); 1424 break; 1425 case NL80211_IFTYPE_ADHOC: 1426 ieee80211_ibss_work(sdata); 1427 break; 1428 case NL80211_IFTYPE_MESH_POINT: 1429 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1430 break; 1431 ieee80211_mesh_work(sdata); 1432 break; 1433 case NL80211_IFTYPE_OCB: 1434 ieee80211_ocb_work(sdata); 1435 break; 1436 default: 1437 break; 1438 } 1439 } 1440 1441 static void ieee80211_recalc_smps_work(struct work_struct *work) 1442 { 1443 struct ieee80211_sub_if_data *sdata = 1444 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1445 1446 ieee80211_recalc_smps(sdata); 1447 } 1448 1449 /* 1450 * Helper function to initialise an interface to a specific type. 1451 */ 1452 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1453 enum nl80211_iftype type) 1454 { 1455 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1456 0xff, 0xff, 0xff}; 1457 1458 /* clear type-dependent union */ 1459 memset(&sdata->u, 0, sizeof(sdata->u)); 1460 1461 /* and set some type-dependent values */ 1462 sdata->vif.type = type; 1463 sdata->vif.p2p = false; 1464 sdata->wdev.iftype = type; 1465 1466 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1467 sdata->control_port_no_encrypt = false; 1468 sdata->control_port_over_nl80211 = false; 1469 sdata->control_port_no_preauth = false; 1470 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1471 sdata->vif.bss_conf.idle = true; 1472 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1473 1474 sdata->noack_map = 0; 1475 sdata->hw_80211_encap = false; 1476 1477 /* only monitor/p2p-device differ */ 1478 if (sdata->dev) { 1479 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1480 sdata->dev->type = ARPHRD_ETHER; 1481 } 1482 1483 skb_queue_head_init(&sdata->skb_queue); 1484 INIT_WORK(&sdata->work, ieee80211_iface_work); 1485 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1486 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1487 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1488 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1489 1490 switch (type) { 1491 case NL80211_IFTYPE_P2P_GO: 1492 type = NL80211_IFTYPE_AP; 1493 sdata->vif.type = type; 1494 sdata->vif.p2p = true; 1495 /* fall through */ 1496 case NL80211_IFTYPE_AP: 1497 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1498 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1499 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1500 break; 1501 case NL80211_IFTYPE_P2P_CLIENT: 1502 type = NL80211_IFTYPE_STATION; 1503 sdata->vif.type = type; 1504 sdata->vif.p2p = true; 1505 /* fall through */ 1506 case NL80211_IFTYPE_STATION: 1507 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1508 ieee80211_sta_setup_sdata(sdata); 1509 break; 1510 case NL80211_IFTYPE_OCB: 1511 sdata->vif.bss_conf.bssid = bssid_wildcard; 1512 ieee80211_ocb_setup_sdata(sdata); 1513 break; 1514 case NL80211_IFTYPE_ADHOC: 1515 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1516 ieee80211_ibss_setup_sdata(sdata); 1517 break; 1518 case NL80211_IFTYPE_MESH_POINT: 1519 if (ieee80211_vif_is_mesh(&sdata->vif)) 1520 ieee80211_mesh_init_sdata(sdata); 1521 break; 1522 case NL80211_IFTYPE_MONITOR: 1523 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1524 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1525 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1526 MONITOR_FLAG_OTHER_BSS; 1527 break; 1528 case NL80211_IFTYPE_WDS: 1529 sdata->vif.bss_conf.bssid = NULL; 1530 break; 1531 case NL80211_IFTYPE_NAN: 1532 idr_init(&sdata->u.nan.function_inst_ids); 1533 spin_lock_init(&sdata->u.nan.func_lock); 1534 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1535 break; 1536 case NL80211_IFTYPE_AP_VLAN: 1537 case NL80211_IFTYPE_P2P_DEVICE: 1538 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1539 break; 1540 case NL80211_IFTYPE_UNSPECIFIED: 1541 case NUM_NL80211_IFTYPES: 1542 WARN_ON(1); 1543 break; 1544 } 1545 1546 ieee80211_debugfs_add_netdev(sdata); 1547 } 1548 1549 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1550 enum nl80211_iftype type) 1551 { 1552 struct ieee80211_local *local = sdata->local; 1553 int ret, err; 1554 enum nl80211_iftype internal_type = type; 1555 bool p2p = false; 1556 1557 ASSERT_RTNL(); 1558 1559 if (!local->ops->change_interface) 1560 return -EBUSY; 1561 1562 switch (sdata->vif.type) { 1563 case NL80211_IFTYPE_AP: 1564 case NL80211_IFTYPE_STATION: 1565 case NL80211_IFTYPE_ADHOC: 1566 case NL80211_IFTYPE_OCB: 1567 /* 1568 * Could maybe also all others here? 1569 * Just not sure how that interacts 1570 * with the RX/config path e.g. for 1571 * mesh. 1572 */ 1573 break; 1574 default: 1575 return -EBUSY; 1576 } 1577 1578 switch (type) { 1579 case NL80211_IFTYPE_AP: 1580 case NL80211_IFTYPE_STATION: 1581 case NL80211_IFTYPE_ADHOC: 1582 case NL80211_IFTYPE_OCB: 1583 /* 1584 * Could probably support everything 1585 * but WDS here (WDS do_open can fail 1586 * under memory pressure, which this 1587 * code isn't prepared to handle). 1588 */ 1589 break; 1590 case NL80211_IFTYPE_P2P_CLIENT: 1591 p2p = true; 1592 internal_type = NL80211_IFTYPE_STATION; 1593 break; 1594 case NL80211_IFTYPE_P2P_GO: 1595 p2p = true; 1596 internal_type = NL80211_IFTYPE_AP; 1597 break; 1598 default: 1599 return -EBUSY; 1600 } 1601 1602 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1603 if (ret) 1604 return ret; 1605 1606 ieee80211_do_stop(sdata, false); 1607 1608 ieee80211_teardown_sdata(sdata); 1609 1610 ret = drv_change_interface(local, sdata, internal_type, p2p); 1611 if (ret) 1612 type = ieee80211_vif_type_p2p(&sdata->vif); 1613 1614 /* 1615 * Ignore return value here, there's not much we can do since 1616 * the driver changed the interface type internally already. 1617 * The warnings will hopefully make driver authors fix it :-) 1618 */ 1619 ieee80211_check_queues(sdata, type); 1620 1621 ieee80211_setup_sdata(sdata, type); 1622 1623 err = ieee80211_do_open(&sdata->wdev, false); 1624 WARN(err, "type change: do_open returned %d", err); 1625 1626 return ret; 1627 } 1628 1629 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1630 enum nl80211_iftype type) 1631 { 1632 int ret; 1633 1634 ASSERT_RTNL(); 1635 1636 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1637 return 0; 1638 1639 if (ieee80211_sdata_running(sdata)) { 1640 ret = ieee80211_runtime_change_iftype(sdata, type); 1641 if (ret) 1642 return ret; 1643 } else { 1644 /* Purge and reset type-dependent state. */ 1645 ieee80211_teardown_sdata(sdata); 1646 ieee80211_setup_sdata(sdata, type); 1647 } 1648 1649 /* reset some values that shouldn't be kept across type changes */ 1650 if (type == NL80211_IFTYPE_STATION) 1651 sdata->u.mgd.use_4addr = false; 1652 1653 return 0; 1654 } 1655 1656 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1657 u8 *perm_addr, enum nl80211_iftype type) 1658 { 1659 struct ieee80211_sub_if_data *sdata; 1660 u64 mask, start, addr, val, inc; 1661 u8 *m; 1662 u8 tmp_addr[ETH_ALEN]; 1663 int i; 1664 1665 /* default ... something at least */ 1666 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1667 1668 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1669 local->hw.wiphy->n_addresses <= 1) 1670 return; 1671 1672 mutex_lock(&local->iflist_mtx); 1673 1674 switch (type) { 1675 case NL80211_IFTYPE_MONITOR: 1676 /* doesn't matter */ 1677 break; 1678 case NL80211_IFTYPE_WDS: 1679 case NL80211_IFTYPE_AP_VLAN: 1680 /* match up with an AP interface */ 1681 list_for_each_entry(sdata, &local->interfaces, list) { 1682 if (sdata->vif.type != NL80211_IFTYPE_AP) 1683 continue; 1684 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1685 break; 1686 } 1687 /* keep default if no AP interface present */ 1688 break; 1689 case NL80211_IFTYPE_P2P_CLIENT: 1690 case NL80211_IFTYPE_P2P_GO: 1691 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1692 list_for_each_entry(sdata, &local->interfaces, list) { 1693 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1694 continue; 1695 if (!ieee80211_sdata_running(sdata)) 1696 continue; 1697 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1698 goto out_unlock; 1699 } 1700 } 1701 /* fall through */ 1702 default: 1703 /* assign a new address if possible -- try n_addresses first */ 1704 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1705 bool used = false; 1706 1707 list_for_each_entry(sdata, &local->interfaces, list) { 1708 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1709 sdata->vif.addr)) { 1710 used = true; 1711 break; 1712 } 1713 } 1714 1715 if (!used) { 1716 memcpy(perm_addr, 1717 local->hw.wiphy->addresses[i].addr, 1718 ETH_ALEN); 1719 break; 1720 } 1721 } 1722 1723 /* try mask if available */ 1724 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1725 break; 1726 1727 m = local->hw.wiphy->addr_mask; 1728 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1729 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1730 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1731 1732 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1733 /* not a contiguous mask ... not handled now! */ 1734 pr_info("not contiguous\n"); 1735 break; 1736 } 1737 1738 /* 1739 * Pick address of existing interface in case user changed 1740 * MAC address manually, default to perm_addr. 1741 */ 1742 m = local->hw.wiphy->perm_addr; 1743 list_for_each_entry(sdata, &local->interfaces, list) { 1744 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1745 continue; 1746 m = sdata->vif.addr; 1747 break; 1748 } 1749 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1750 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1751 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1752 1753 inc = 1ULL<<__ffs64(mask); 1754 val = (start & mask); 1755 addr = (start & ~mask) | (val & mask); 1756 do { 1757 bool used = false; 1758 1759 tmp_addr[5] = addr >> 0*8; 1760 tmp_addr[4] = addr >> 1*8; 1761 tmp_addr[3] = addr >> 2*8; 1762 tmp_addr[2] = addr >> 3*8; 1763 tmp_addr[1] = addr >> 4*8; 1764 tmp_addr[0] = addr >> 5*8; 1765 1766 val += inc; 1767 1768 list_for_each_entry(sdata, &local->interfaces, list) { 1769 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1770 used = true; 1771 break; 1772 } 1773 } 1774 1775 if (!used) { 1776 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1777 break; 1778 } 1779 addr = (start & ~mask) | (val & mask); 1780 } while (addr != start); 1781 1782 break; 1783 } 1784 1785 out_unlock: 1786 mutex_unlock(&local->iflist_mtx); 1787 } 1788 1789 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1790 unsigned char name_assign_type, 1791 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1792 struct vif_params *params) 1793 { 1794 struct net_device *ndev = NULL; 1795 struct ieee80211_sub_if_data *sdata = NULL; 1796 struct txq_info *txqi; 1797 void (*if_setup)(struct net_device *dev); 1798 int ret, i; 1799 int txqs = 1; 1800 1801 ASSERT_RTNL(); 1802 1803 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1804 struct wireless_dev *wdev; 1805 1806 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1807 GFP_KERNEL); 1808 if (!sdata) 1809 return -ENOMEM; 1810 wdev = &sdata->wdev; 1811 1812 sdata->dev = NULL; 1813 strlcpy(sdata->name, name, IFNAMSIZ); 1814 ieee80211_assign_perm_addr(local, wdev->address, type); 1815 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1816 } else { 1817 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1818 sizeof(void *)); 1819 int txq_size = 0; 1820 1821 if (local->ops->wake_tx_queue && 1822 type != NL80211_IFTYPE_AP_VLAN && 1823 (type != NL80211_IFTYPE_MONITOR || 1824 (params->flags & MONITOR_FLAG_ACTIVE))) 1825 txq_size += sizeof(struct txq_info) + 1826 local->hw.txq_data_size; 1827 1828 if (local->ops->wake_tx_queue) { 1829 if_setup = ieee80211_if_setup_no_queue; 1830 } else { 1831 if_setup = ieee80211_if_setup; 1832 if (local->hw.queues >= IEEE80211_NUM_ACS) 1833 txqs = IEEE80211_NUM_ACS; 1834 } 1835 1836 ndev = alloc_netdev_mqs(size + txq_size, 1837 name, name_assign_type, 1838 if_setup, txqs, 1); 1839 if (!ndev) 1840 return -ENOMEM; 1841 1842 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 1843 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 1844 1845 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1846 1847 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1848 if (!ndev->tstats) { 1849 free_netdev(ndev); 1850 return -ENOMEM; 1851 } 1852 1853 ndev->needed_headroom = local->tx_headroom + 1854 4*6 /* four MAC addresses */ 1855 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1856 + 6 /* mesh */ 1857 + 8 /* rfc1042/bridge tunnel */ 1858 - ETH_HLEN /* ethernet hard_header_len */ 1859 + IEEE80211_ENCRYPT_HEADROOM; 1860 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1861 1862 ret = dev_alloc_name(ndev, ndev->name); 1863 if (ret < 0) { 1864 ieee80211_if_free(ndev); 1865 free_netdev(ndev); 1866 return ret; 1867 } 1868 1869 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1870 if (is_valid_ether_addr(params->macaddr)) 1871 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1872 else 1873 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1874 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1875 1876 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1877 sdata = netdev_priv(ndev); 1878 ndev->ieee80211_ptr = &sdata->wdev; 1879 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1880 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1881 1882 if (txq_size) { 1883 txqi = netdev_priv(ndev) + size; 1884 ieee80211_txq_init(sdata, NULL, txqi, 0); 1885 } 1886 1887 sdata->dev = ndev; 1888 } 1889 1890 /* initialise type-independent data */ 1891 sdata->wdev.wiphy = local->hw.wiphy; 1892 sdata->local = local; 1893 1894 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1895 skb_queue_head_init(&sdata->fragments[i].skb_list); 1896 1897 INIT_LIST_HEAD(&sdata->key_list); 1898 1899 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1900 ieee80211_dfs_cac_timer_work); 1901 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1902 ieee80211_delayed_tailroom_dec); 1903 1904 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1905 struct ieee80211_supported_band *sband; 1906 sband = local->hw.wiphy->bands[i]; 1907 sdata->rc_rateidx_mask[i] = 1908 sband ? (1 << sband->n_bitrates) - 1 : 0; 1909 if (sband) { 1910 __le16 cap; 1911 u16 *vht_rate_mask; 1912 1913 memcpy(sdata->rc_rateidx_mcs_mask[i], 1914 sband->ht_cap.mcs.rx_mask, 1915 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1916 1917 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1918 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1919 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1920 } else { 1921 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1922 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1923 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1924 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1925 } 1926 } 1927 1928 ieee80211_set_default_queues(sdata); 1929 1930 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1931 sdata->user_power_level = local->user_power_level; 1932 1933 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1934 1935 /* setup type-dependent data */ 1936 ieee80211_setup_sdata(sdata, type); 1937 1938 if (ndev) { 1939 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1940 if (type == NL80211_IFTYPE_STATION) 1941 sdata->u.mgd.use_4addr = params->use_4addr; 1942 1943 ndev->features |= local->hw.netdev_features; 1944 ndev->hw_features |= ndev->features & 1945 MAC80211_SUPPORTED_FEATURES_TX; 1946 1947 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1948 1949 /* MTU range: 256 - 2304 */ 1950 ndev->min_mtu = 256; 1951 ndev->max_mtu = local->hw.max_mtu; 1952 1953 ret = register_netdevice(ndev); 1954 if (ret) { 1955 free_netdev(ndev); 1956 return ret; 1957 } 1958 } 1959 1960 mutex_lock(&local->iflist_mtx); 1961 list_add_tail_rcu(&sdata->list, &local->interfaces); 1962 mutex_unlock(&local->iflist_mtx); 1963 1964 if (new_wdev) 1965 *new_wdev = &sdata->wdev; 1966 1967 return 0; 1968 } 1969 1970 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1971 { 1972 ASSERT_RTNL(); 1973 1974 mutex_lock(&sdata->local->iflist_mtx); 1975 list_del_rcu(&sdata->list); 1976 mutex_unlock(&sdata->local->iflist_mtx); 1977 1978 if (sdata->vif.txq) 1979 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 1980 1981 synchronize_rcu(); 1982 1983 if (sdata->dev) { 1984 unregister_netdevice(sdata->dev); 1985 } else { 1986 cfg80211_unregister_wdev(&sdata->wdev); 1987 ieee80211_teardown_sdata(sdata); 1988 kfree(sdata); 1989 } 1990 } 1991 1992 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1993 { 1994 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1995 return; 1996 ieee80211_do_stop(sdata, true); 1997 } 1998 1999 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2000 { 2001 struct ieee80211_sub_if_data *sdata, *tmp; 2002 LIST_HEAD(unreg_list); 2003 LIST_HEAD(wdev_list); 2004 2005 ASSERT_RTNL(); 2006 2007 /* Before destroying the interfaces, make sure they're all stopped so 2008 * that the hardware is stopped. Otherwise, the driver might still be 2009 * iterating the interfaces during the shutdown, e.g. from a worker 2010 * or from RX processing or similar, and if it does so (using atomic 2011 * iteration) while we're manipulating the list, the iteration will 2012 * crash. 2013 * 2014 * After this, the hardware should be stopped and the driver should 2015 * have stopped all of its activities, so that we can do RCU-unaware 2016 * manipulations of the interface list below. 2017 */ 2018 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2019 2020 WARN(local->open_count, "%s: open count remains %d\n", 2021 wiphy_name(local->hw.wiphy), local->open_count); 2022 2023 ieee80211_txq_teardown_flows(local); 2024 2025 mutex_lock(&local->iflist_mtx); 2026 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2027 list_del(&sdata->list); 2028 2029 if (sdata->dev) 2030 unregister_netdevice_queue(sdata->dev, &unreg_list); 2031 else 2032 list_add(&sdata->list, &wdev_list); 2033 } 2034 mutex_unlock(&local->iflist_mtx); 2035 unregister_netdevice_many(&unreg_list); 2036 2037 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2038 list_del(&sdata->list); 2039 cfg80211_unregister_wdev(&sdata->wdev); 2040 kfree(sdata); 2041 } 2042 } 2043 2044 static int netdev_notify(struct notifier_block *nb, 2045 unsigned long state, void *ptr) 2046 { 2047 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2048 struct ieee80211_sub_if_data *sdata; 2049 2050 if (state != NETDEV_CHANGENAME) 2051 return NOTIFY_DONE; 2052 2053 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2054 return NOTIFY_DONE; 2055 2056 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2057 return NOTIFY_DONE; 2058 2059 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2060 memcpy(sdata->name, dev->name, IFNAMSIZ); 2061 ieee80211_debugfs_rename_netdev(sdata); 2062 2063 return NOTIFY_OK; 2064 } 2065 2066 static struct notifier_block mac80211_netdev_notifier = { 2067 .notifier_call = netdev_notify, 2068 }; 2069 2070 int ieee80211_iface_init(void) 2071 { 2072 return register_netdevice_notifier(&mac80211_netdev_notifier); 2073 } 2074 2075 void ieee80211_iface_exit(void) 2076 { 2077 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2078 } 2079 2080 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2081 { 2082 if (sdata->vif.type == NL80211_IFTYPE_AP) 2083 atomic_inc(&sdata->u.ap.num_mcast_sta); 2084 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2085 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2086 } 2087 2088 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2089 { 2090 if (sdata->vif.type == NL80211_IFTYPE_AP) 2091 atomic_dec(&sdata->u.ap.num_mcast_sta); 2092 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2093 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2094 } 2095