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.probe_req_reg) 648 drv_config_iface_filter(local, sdata, 649 FIF_PROBE_REQ, 650 FIF_PROBE_REQ); 651 652 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 653 sdata->vif.type != NL80211_IFTYPE_NAN) 654 changed |= ieee80211_reset_erp_info(sdata); 655 ieee80211_bss_info_change_notify(sdata, changed); 656 657 switch (sdata->vif.type) { 658 case NL80211_IFTYPE_STATION: 659 case NL80211_IFTYPE_ADHOC: 660 case NL80211_IFTYPE_AP: 661 case NL80211_IFTYPE_MESH_POINT: 662 case NL80211_IFTYPE_OCB: 663 netif_carrier_off(dev); 664 break; 665 case NL80211_IFTYPE_WDS: 666 case NL80211_IFTYPE_P2P_DEVICE: 667 case NL80211_IFTYPE_NAN: 668 break; 669 default: 670 /* not reached */ 671 WARN_ON(1); 672 } 673 674 /* 675 * Set default queue parameters so drivers don't 676 * need to initialise the hardware if the hardware 677 * doesn't start up with sane defaults. 678 * Enable QoS for anything but station interfaces. 679 */ 680 ieee80211_set_wmm_default(sdata, true, 681 sdata->vif.type != NL80211_IFTYPE_STATION); 682 } 683 684 set_bit(SDATA_STATE_RUNNING, &sdata->state); 685 686 switch (sdata->vif.type) { 687 case NL80211_IFTYPE_WDS: 688 /* Create STA entry for the WDS peer */ 689 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 690 GFP_KERNEL); 691 if (!sta) { 692 res = -ENOMEM; 693 goto err_del_interface; 694 } 695 696 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 697 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 698 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 699 700 res = sta_info_insert(sta); 701 if (res) { 702 /* STA has been freed */ 703 goto err_del_interface; 704 } 705 706 rate_control_rate_init(sta); 707 netif_carrier_on(dev); 708 break; 709 case NL80211_IFTYPE_P2P_DEVICE: 710 rcu_assign_pointer(local->p2p_sdata, sdata); 711 break; 712 case NL80211_IFTYPE_MONITOR: 713 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 714 break; 715 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 716 break; 717 default: 718 break; 719 } 720 721 /* 722 * set_multicast_list will be invoked by the networking core 723 * which will check whether any increments here were done in 724 * error and sync them down to the hardware as filter flags. 725 */ 726 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 727 atomic_inc(&local->iff_allmultis); 728 729 if (coming_up) 730 local->open_count++; 731 732 if (hw_reconf_flags) 733 ieee80211_hw_config(local, hw_reconf_flags); 734 735 ieee80211_recalc_ps(local); 736 737 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 738 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 739 local->ops->wake_tx_queue) { 740 /* XXX: for AP_VLAN, actually track AP queues */ 741 if (dev) 742 netif_tx_start_all_queues(dev); 743 } else if (dev) { 744 unsigned long flags; 745 int n_acs = IEEE80211_NUM_ACS; 746 int ac; 747 748 if (local->hw.queues < IEEE80211_NUM_ACS) 749 n_acs = 1; 750 751 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 752 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 753 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 754 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 755 for (ac = 0; ac < n_acs; ac++) { 756 int ac_queue = sdata->vif.hw_queue[ac]; 757 758 if (local->queue_stop_reasons[ac_queue] == 0 && 759 skb_queue_empty(&local->pending[ac_queue])) 760 netif_start_subqueue(dev, ac); 761 } 762 } 763 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 764 } 765 766 return 0; 767 err_del_interface: 768 drv_remove_interface(local, sdata); 769 err_stop: 770 if (!local->open_count) 771 drv_stop(local); 772 err_del_bss: 773 sdata->bss = NULL; 774 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 775 mutex_lock(&local->mtx); 776 list_del(&sdata->u.vlan.list); 777 mutex_unlock(&local->mtx); 778 } 779 /* might already be clear but that doesn't matter */ 780 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 781 return res; 782 } 783 784 static int ieee80211_open(struct net_device *dev) 785 { 786 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 787 int err; 788 789 /* fail early if user set an invalid address */ 790 if (!is_valid_ether_addr(dev->dev_addr)) 791 return -EADDRNOTAVAIL; 792 793 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 794 if (err) 795 return err; 796 797 return ieee80211_do_open(&sdata->wdev, true); 798 } 799 800 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 801 bool going_down) 802 { 803 struct ieee80211_local *local = sdata->local; 804 unsigned long flags; 805 struct sk_buff *skb, *tmp; 806 u32 hw_reconf_flags = 0; 807 int i, flushed; 808 struct ps_data *ps; 809 struct cfg80211_chan_def chandef; 810 bool cancel_scan; 811 struct cfg80211_nan_func *func; 812 813 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 814 815 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 816 if (cancel_scan) 817 ieee80211_scan_cancel(local); 818 819 /* 820 * Stop TX on this interface first. 821 */ 822 if (sdata->dev) 823 netif_tx_stop_all_queues(sdata->dev); 824 825 ieee80211_roc_purge(local, sdata); 826 827 switch (sdata->vif.type) { 828 case NL80211_IFTYPE_STATION: 829 ieee80211_mgd_stop(sdata); 830 break; 831 case NL80211_IFTYPE_ADHOC: 832 ieee80211_ibss_stop(sdata); 833 break; 834 case NL80211_IFTYPE_MONITOR: 835 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 836 break; 837 list_del_rcu(&sdata->u.mntr.list); 838 break; 839 default: 840 break; 841 } 842 843 /* 844 * Remove all stations associated with this interface. 845 * 846 * This must be done before calling ops->remove_interface() 847 * because otherwise we can later invoke ops->sta_notify() 848 * whenever the STAs are removed, and that invalidates driver 849 * assumptions about always getting a vif pointer that is valid 850 * (because if we remove a STA after ops->remove_interface() 851 * the driver will have removed the vif info already!) 852 * 853 * In WDS mode a station must exist here and be flushed, for 854 * AP_VLANs stations may exist since there's nothing else that 855 * would have removed them, but in other modes there shouldn't 856 * be any stations. 857 */ 858 flushed = sta_info_flush(sdata); 859 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 860 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 861 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 862 863 /* don't count this interface for allmulti while it is down */ 864 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 865 atomic_dec(&local->iff_allmultis); 866 867 if (sdata->vif.type == NL80211_IFTYPE_AP) { 868 local->fif_pspoll--; 869 local->fif_probe_req--; 870 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 871 local->fif_probe_req--; 872 } 873 874 if (sdata->dev) { 875 netif_addr_lock_bh(sdata->dev); 876 spin_lock_bh(&local->filter_lock); 877 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 878 sdata->dev->addr_len); 879 spin_unlock_bh(&local->filter_lock); 880 netif_addr_unlock_bh(sdata->dev); 881 } 882 883 del_timer_sync(&local->dynamic_ps_timer); 884 cancel_work_sync(&local->dynamic_ps_enable_work); 885 886 cancel_work_sync(&sdata->recalc_smps); 887 sdata_lock(sdata); 888 mutex_lock(&local->mtx); 889 sdata->vif.csa_active = false; 890 if (sdata->vif.type == NL80211_IFTYPE_STATION) 891 sdata->u.mgd.csa_waiting_bcn = false; 892 if (sdata->csa_block_tx) { 893 ieee80211_wake_vif_queues(local, sdata, 894 IEEE80211_QUEUE_STOP_REASON_CSA); 895 sdata->csa_block_tx = false; 896 } 897 mutex_unlock(&local->mtx); 898 sdata_unlock(sdata); 899 900 cancel_work_sync(&sdata->csa_finalize_work); 901 902 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 903 904 if (sdata->wdev.cac_started) { 905 chandef = sdata->vif.bss_conf.chandef; 906 WARN_ON(local->suspended); 907 mutex_lock(&local->mtx); 908 ieee80211_vif_release_channel(sdata); 909 mutex_unlock(&local->mtx); 910 cfg80211_cac_event(sdata->dev, &chandef, 911 NL80211_RADAR_CAC_ABORTED, 912 GFP_KERNEL); 913 } 914 915 /* APs need special treatment */ 916 if (sdata->vif.type == NL80211_IFTYPE_AP) { 917 struct ieee80211_sub_if_data *vlan, *tmpsdata; 918 919 /* down all dependent devices, that is VLANs */ 920 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 921 u.vlan.list) 922 dev_close(vlan->dev); 923 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 924 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 925 /* remove all packets in parent bc_buf pointing to this dev */ 926 ps = &sdata->bss->ps; 927 928 spin_lock_irqsave(&ps->bc_buf.lock, flags); 929 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 930 if (skb->dev == sdata->dev) { 931 __skb_unlink(skb, &ps->bc_buf); 932 local->total_ps_buffered--; 933 ieee80211_free_txskb(&local->hw, skb); 934 } 935 } 936 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 937 } 938 939 if (going_down) 940 local->open_count--; 941 942 switch (sdata->vif.type) { 943 case NL80211_IFTYPE_AP_VLAN: 944 mutex_lock(&local->mtx); 945 list_del(&sdata->u.vlan.list); 946 mutex_unlock(&local->mtx); 947 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 948 /* see comment in the default case below */ 949 ieee80211_free_keys(sdata, true); 950 /* no need to tell driver */ 951 break; 952 case NL80211_IFTYPE_MONITOR: 953 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 954 local->cooked_mntrs--; 955 break; 956 } 957 958 local->monitors--; 959 if (local->monitors == 0) { 960 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 961 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 962 } 963 964 ieee80211_adjust_monitor_flags(sdata, -1); 965 break; 966 case NL80211_IFTYPE_NAN: 967 /* clean all the functions */ 968 spin_lock_bh(&sdata->u.nan.func_lock); 969 970 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 971 idr_remove(&sdata->u.nan.function_inst_ids, i); 972 cfg80211_free_nan_func(func); 973 } 974 idr_destroy(&sdata->u.nan.function_inst_ids); 975 976 spin_unlock_bh(&sdata->u.nan.func_lock); 977 break; 978 case NL80211_IFTYPE_P2P_DEVICE: 979 /* relies on synchronize_rcu() below */ 980 RCU_INIT_POINTER(local->p2p_sdata, NULL); 981 /* fall through */ 982 default: 983 cancel_work_sync(&sdata->work); 984 /* 985 * When we get here, the interface is marked down. 986 * Free the remaining keys, if there are any 987 * (which can happen in AP mode if userspace sets 988 * keys before the interface is operating, and maybe 989 * also in WDS mode) 990 * 991 * Force the key freeing to always synchronize_net() 992 * to wait for the RX path in case it is using this 993 * interface enqueuing frames at this very time on 994 * another CPU. 995 */ 996 ieee80211_free_keys(sdata, true); 997 skb_queue_purge(&sdata->skb_queue); 998 } 999 1000 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1001 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 1002 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 1003 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1004 if (info->control.vif == &sdata->vif) { 1005 __skb_unlink(skb, &local->pending[i]); 1006 ieee80211_free_txskb(&local->hw, skb); 1007 } 1008 } 1009 } 1010 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1011 1012 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1013 ieee80211_txq_remove_vlan(local, sdata); 1014 1015 sdata->bss = NULL; 1016 1017 if (local->open_count == 0) 1018 ieee80211_clear_tx_pending(local); 1019 1020 sdata->vif.bss_conf.beacon_int = 0; 1021 1022 /* 1023 * If the interface goes down while suspended, presumably because 1024 * the device was unplugged and that happens before our resume, 1025 * then the driver is already unconfigured and the remainder of 1026 * this function isn't needed. 1027 * XXX: what about WoWLAN? If the device has software state, e.g. 1028 * memory allocated, it might expect teardown commands from 1029 * mac80211 here? 1030 */ 1031 if (local->suspended) { 1032 WARN_ON(local->wowlan); 1033 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1034 return; 1035 } 1036 1037 switch (sdata->vif.type) { 1038 case NL80211_IFTYPE_AP_VLAN: 1039 break; 1040 case NL80211_IFTYPE_MONITOR: 1041 if (local->monitors == 0) 1042 ieee80211_del_virtual_monitor(local); 1043 1044 mutex_lock(&local->mtx); 1045 ieee80211_recalc_idle(local); 1046 mutex_unlock(&local->mtx); 1047 1048 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1049 break; 1050 1051 /* fall through */ 1052 default: 1053 if (going_down) 1054 drv_remove_interface(local, sdata); 1055 } 1056 1057 ieee80211_recalc_ps(local); 1058 1059 if (cancel_scan) 1060 flush_delayed_work(&local->scan_work); 1061 1062 if (local->open_count == 0) { 1063 ieee80211_stop_device(local); 1064 1065 /* no reconfiguring after stop! */ 1066 return; 1067 } 1068 1069 /* do after stop to avoid reconfiguring when we stop anyway */ 1070 ieee80211_configure_filter(local); 1071 ieee80211_hw_config(local, hw_reconf_flags); 1072 1073 if (local->monitors == local->open_count) 1074 ieee80211_add_virtual_monitor(local); 1075 } 1076 1077 static int ieee80211_stop(struct net_device *dev) 1078 { 1079 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1080 1081 ieee80211_do_stop(sdata, true); 1082 1083 return 0; 1084 } 1085 1086 static void ieee80211_set_multicast_list(struct net_device *dev) 1087 { 1088 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1089 struct ieee80211_local *local = sdata->local; 1090 int allmulti, sdata_allmulti; 1091 1092 allmulti = !!(dev->flags & IFF_ALLMULTI); 1093 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1094 1095 if (allmulti != sdata_allmulti) { 1096 if (dev->flags & IFF_ALLMULTI) 1097 atomic_inc(&local->iff_allmultis); 1098 else 1099 atomic_dec(&local->iff_allmultis); 1100 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1101 } 1102 1103 spin_lock_bh(&local->filter_lock); 1104 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1105 spin_unlock_bh(&local->filter_lock); 1106 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1107 } 1108 1109 /* 1110 * Called when the netdev is removed or, by the code below, before 1111 * the interface type changes. 1112 */ 1113 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1114 { 1115 int i; 1116 1117 /* free extra data */ 1118 ieee80211_free_keys(sdata, false); 1119 1120 ieee80211_debugfs_remove_netdev(sdata); 1121 1122 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1123 __skb_queue_purge(&sdata->fragments[i].skb_list); 1124 sdata->fragment_next = 0; 1125 1126 if (ieee80211_vif_is_mesh(&sdata->vif)) 1127 ieee80211_mesh_teardown_sdata(sdata); 1128 } 1129 1130 static void ieee80211_uninit(struct net_device *dev) 1131 { 1132 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1133 } 1134 1135 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1136 struct sk_buff *skb, 1137 struct net_device *sb_dev) 1138 { 1139 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1140 } 1141 1142 static void 1143 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1144 { 1145 int i; 1146 1147 for_each_possible_cpu(i) { 1148 const struct pcpu_sw_netstats *tstats; 1149 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1150 unsigned int start; 1151 1152 tstats = per_cpu_ptr(dev->tstats, i); 1153 1154 do { 1155 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1156 rx_packets = tstats->rx_packets; 1157 tx_packets = tstats->tx_packets; 1158 rx_bytes = tstats->rx_bytes; 1159 tx_bytes = tstats->tx_bytes; 1160 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1161 1162 stats->rx_packets += rx_packets; 1163 stats->tx_packets += tx_packets; 1164 stats->rx_bytes += rx_bytes; 1165 stats->tx_bytes += tx_bytes; 1166 } 1167 } 1168 1169 static const struct net_device_ops ieee80211_dataif_ops = { 1170 .ndo_open = ieee80211_open, 1171 .ndo_stop = ieee80211_stop, 1172 .ndo_uninit = ieee80211_uninit, 1173 .ndo_start_xmit = ieee80211_subif_start_xmit, 1174 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1175 .ndo_set_mac_address = ieee80211_change_mac, 1176 .ndo_select_queue = ieee80211_netdev_select_queue, 1177 .ndo_get_stats64 = ieee80211_get_stats64, 1178 }; 1179 1180 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1181 struct sk_buff *skb, 1182 struct net_device *sb_dev) 1183 { 1184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1185 struct ieee80211_local *local = sdata->local; 1186 struct ieee80211_hdr *hdr; 1187 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1188 1189 if (local->hw.queues < IEEE80211_NUM_ACS) 1190 return 0; 1191 1192 if (skb->len < 4 || 1193 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1194 return 0; /* doesn't matter, frame will be dropped */ 1195 1196 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1197 1198 return ieee80211_select_queue_80211(sdata, skb, hdr); 1199 } 1200 1201 static const struct net_device_ops ieee80211_monitorif_ops = { 1202 .ndo_open = ieee80211_open, 1203 .ndo_stop = ieee80211_stop, 1204 .ndo_uninit = ieee80211_uninit, 1205 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1206 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1207 .ndo_set_mac_address = ieee80211_change_mac, 1208 .ndo_select_queue = ieee80211_monitor_select_queue, 1209 .ndo_get_stats64 = ieee80211_get_stats64, 1210 }; 1211 1212 static const struct net_device_ops ieee80211_dataif_8023_ops = { 1213 .ndo_open = ieee80211_open, 1214 .ndo_stop = ieee80211_stop, 1215 .ndo_uninit = ieee80211_uninit, 1216 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 1217 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1218 .ndo_set_mac_address = ieee80211_change_mac, 1219 .ndo_select_queue = ieee80211_netdev_select_queue, 1220 .ndo_get_stats64 = ieee80211_get_stats64, 1221 }; 1222 1223 static void __ieee80211_set_hw_80211_encap(struct ieee80211_sub_if_data *sdata, 1224 bool enable) 1225 { 1226 sdata->dev->netdev_ops = enable ? &ieee80211_dataif_8023_ops : 1227 &ieee80211_dataif_ops; 1228 sdata->hw_80211_encap = enable; 1229 } 1230 1231 bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable) 1232 { 1233 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1234 struct ieee80211_local *local = sdata->local; 1235 struct ieee80211_sub_if_data *iter; 1236 struct ieee80211_key *key; 1237 1238 mutex_lock(&local->iflist_mtx); 1239 list_for_each_entry(iter, &local->interfaces, list) { 1240 struct ieee80211_sub_if_data *disable = NULL; 1241 1242 if (vif->type == NL80211_IFTYPE_MONITOR) { 1243 disable = iter; 1244 __ieee80211_set_hw_80211_encap(iter, false); 1245 } else if (iter->vif.type == NL80211_IFTYPE_MONITOR) { 1246 disable = sdata; 1247 enable = false; 1248 } 1249 if (disable) 1250 sdata_dbg(disable, 1251 "disable hw 80211 encap due to mon co-exist\n"); 1252 } 1253 mutex_unlock(&local->iflist_mtx); 1254 1255 if (enable == sdata->hw_80211_encap) 1256 return enable; 1257 1258 if (!sdata->dev) 1259 return false; 1260 1261 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 1262 (local->hw.wiphy->frag_threshold != (u32)-1)) 1263 enable = false; 1264 1265 mutex_lock(&sdata->local->key_mtx); 1266 list_for_each_entry(key, &sdata->key_list, list) { 1267 if (key->conf.cipher == WLAN_CIPHER_SUITE_TKIP) 1268 enable = false; 1269 } 1270 mutex_unlock(&sdata->local->key_mtx); 1271 1272 __ieee80211_set_hw_80211_encap(sdata, enable); 1273 1274 return enable; 1275 } 1276 EXPORT_SYMBOL(ieee80211_set_hw_80211_encap); 1277 1278 static void ieee80211_if_free(struct net_device *dev) 1279 { 1280 free_percpu(dev->tstats); 1281 } 1282 1283 static void ieee80211_if_setup(struct net_device *dev) 1284 { 1285 ether_setup(dev); 1286 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1287 dev->netdev_ops = &ieee80211_dataif_ops; 1288 dev->needs_free_netdev = true; 1289 dev->priv_destructor = ieee80211_if_free; 1290 } 1291 1292 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1293 { 1294 ieee80211_if_setup(dev); 1295 dev->priv_flags |= IFF_NO_QUEUE; 1296 } 1297 1298 static void ieee80211_iface_work(struct work_struct *work) 1299 { 1300 struct ieee80211_sub_if_data *sdata = 1301 container_of(work, struct ieee80211_sub_if_data, work); 1302 struct ieee80211_local *local = sdata->local; 1303 struct sk_buff *skb; 1304 struct sta_info *sta; 1305 1306 if (!ieee80211_sdata_running(sdata)) 1307 return; 1308 1309 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1310 return; 1311 1312 if (!ieee80211_can_run_worker(local)) 1313 return; 1314 1315 /* first process frames */ 1316 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1317 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1318 1319 if (ieee80211_is_action(mgmt->frame_control) && 1320 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1321 int len = skb->len; 1322 1323 mutex_lock(&local->sta_mtx); 1324 sta = sta_info_get_bss(sdata, mgmt->sa); 1325 if (sta) { 1326 switch (mgmt->u.action.u.addba_req.action_code) { 1327 case WLAN_ACTION_ADDBA_REQ: 1328 ieee80211_process_addba_request( 1329 local, sta, mgmt, len); 1330 break; 1331 case WLAN_ACTION_ADDBA_RESP: 1332 ieee80211_process_addba_resp(local, sta, 1333 mgmt, len); 1334 break; 1335 case WLAN_ACTION_DELBA: 1336 ieee80211_process_delba(sdata, sta, 1337 mgmt, len); 1338 break; 1339 default: 1340 WARN_ON(1); 1341 break; 1342 } 1343 } 1344 mutex_unlock(&local->sta_mtx); 1345 } else if (ieee80211_is_action(mgmt->frame_control) && 1346 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1347 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1348 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1349 struct ieee80211_rx_status *status; 1350 enum nl80211_band band; 1351 u8 opmode; 1352 1353 status = IEEE80211_SKB_RXCB(skb); 1354 band = status->band; 1355 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1356 1357 mutex_lock(&local->sta_mtx); 1358 sta = sta_info_get_bss(sdata, mgmt->sa); 1359 1360 if (sta) 1361 ieee80211_vht_handle_opmode(sdata, sta, 1362 opmode, 1363 band); 1364 1365 mutex_unlock(&local->sta_mtx); 1366 break; 1367 } 1368 case WLAN_VHT_ACTION_GROUPID_MGMT: 1369 ieee80211_process_mu_groups(sdata, mgmt); 1370 break; 1371 default: 1372 WARN_ON(1); 1373 break; 1374 } 1375 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1376 struct ieee80211_hdr *hdr = (void *)mgmt; 1377 /* 1378 * So the frame isn't mgmt, but frame_control 1379 * is at the right place anyway, of course, so 1380 * the if statement is correct. 1381 * 1382 * Warn if we have other data frame types here, 1383 * they must not get here. 1384 */ 1385 WARN_ON(hdr->frame_control & 1386 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1387 WARN_ON(!(hdr->seq_ctrl & 1388 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1389 /* 1390 * This was a fragment of a frame, received while 1391 * a block-ack session was active. That cannot be 1392 * right, so terminate the session. 1393 */ 1394 mutex_lock(&local->sta_mtx); 1395 sta = sta_info_get_bss(sdata, mgmt->sa); 1396 if (sta) { 1397 u16 tid = ieee80211_get_tid(hdr); 1398 1399 __ieee80211_stop_rx_ba_session( 1400 sta, tid, WLAN_BACK_RECIPIENT, 1401 WLAN_REASON_QSTA_REQUIRE_SETUP, 1402 true); 1403 } 1404 mutex_unlock(&local->sta_mtx); 1405 } else switch (sdata->vif.type) { 1406 case NL80211_IFTYPE_STATION: 1407 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1408 break; 1409 case NL80211_IFTYPE_ADHOC: 1410 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1411 break; 1412 case NL80211_IFTYPE_MESH_POINT: 1413 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1414 break; 1415 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1416 break; 1417 default: 1418 WARN(1, "frame for unexpected interface type"); 1419 break; 1420 } 1421 1422 kfree_skb(skb); 1423 } 1424 1425 /* then other type-dependent work */ 1426 switch (sdata->vif.type) { 1427 case NL80211_IFTYPE_STATION: 1428 ieee80211_sta_work(sdata); 1429 break; 1430 case NL80211_IFTYPE_ADHOC: 1431 ieee80211_ibss_work(sdata); 1432 break; 1433 case NL80211_IFTYPE_MESH_POINT: 1434 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1435 break; 1436 ieee80211_mesh_work(sdata); 1437 break; 1438 case NL80211_IFTYPE_OCB: 1439 ieee80211_ocb_work(sdata); 1440 break; 1441 default: 1442 break; 1443 } 1444 } 1445 1446 static void ieee80211_recalc_smps_work(struct work_struct *work) 1447 { 1448 struct ieee80211_sub_if_data *sdata = 1449 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1450 1451 ieee80211_recalc_smps(sdata); 1452 } 1453 1454 /* 1455 * Helper function to initialise an interface to a specific type. 1456 */ 1457 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1458 enum nl80211_iftype type) 1459 { 1460 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1461 0xff, 0xff, 0xff}; 1462 1463 /* clear type-dependent union */ 1464 memset(&sdata->u, 0, sizeof(sdata->u)); 1465 1466 /* and set some type-dependent values */ 1467 sdata->vif.type = type; 1468 sdata->vif.p2p = false; 1469 sdata->wdev.iftype = type; 1470 1471 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1472 sdata->control_port_no_encrypt = false; 1473 sdata->control_port_over_nl80211 = false; 1474 sdata->control_port_no_preauth = false; 1475 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1476 sdata->vif.bss_conf.idle = true; 1477 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1478 1479 sdata->noack_map = 0; 1480 sdata->hw_80211_encap = false; 1481 1482 /* only monitor/p2p-device differ */ 1483 if (sdata->dev) { 1484 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1485 sdata->dev->type = ARPHRD_ETHER; 1486 } 1487 1488 skb_queue_head_init(&sdata->skb_queue); 1489 INIT_WORK(&sdata->work, ieee80211_iface_work); 1490 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1491 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1492 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1493 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1494 1495 switch (type) { 1496 case NL80211_IFTYPE_P2P_GO: 1497 type = NL80211_IFTYPE_AP; 1498 sdata->vif.type = type; 1499 sdata->vif.p2p = true; 1500 /* fall through */ 1501 case NL80211_IFTYPE_AP: 1502 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1503 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1504 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1505 break; 1506 case NL80211_IFTYPE_P2P_CLIENT: 1507 type = NL80211_IFTYPE_STATION; 1508 sdata->vif.type = type; 1509 sdata->vif.p2p = true; 1510 /* fall through */ 1511 case NL80211_IFTYPE_STATION: 1512 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1513 ieee80211_sta_setup_sdata(sdata); 1514 break; 1515 case NL80211_IFTYPE_OCB: 1516 sdata->vif.bss_conf.bssid = bssid_wildcard; 1517 ieee80211_ocb_setup_sdata(sdata); 1518 break; 1519 case NL80211_IFTYPE_ADHOC: 1520 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1521 ieee80211_ibss_setup_sdata(sdata); 1522 break; 1523 case NL80211_IFTYPE_MESH_POINT: 1524 if (ieee80211_vif_is_mesh(&sdata->vif)) 1525 ieee80211_mesh_init_sdata(sdata); 1526 break; 1527 case NL80211_IFTYPE_MONITOR: 1528 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1529 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1530 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1531 MONITOR_FLAG_OTHER_BSS; 1532 break; 1533 case NL80211_IFTYPE_WDS: 1534 sdata->vif.bss_conf.bssid = NULL; 1535 break; 1536 case NL80211_IFTYPE_NAN: 1537 idr_init(&sdata->u.nan.function_inst_ids); 1538 spin_lock_init(&sdata->u.nan.func_lock); 1539 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1540 break; 1541 case NL80211_IFTYPE_AP_VLAN: 1542 case NL80211_IFTYPE_P2P_DEVICE: 1543 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1544 break; 1545 case NL80211_IFTYPE_UNSPECIFIED: 1546 case NUM_NL80211_IFTYPES: 1547 WARN_ON(1); 1548 break; 1549 } 1550 1551 ieee80211_debugfs_add_netdev(sdata); 1552 } 1553 1554 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1555 enum nl80211_iftype type) 1556 { 1557 struct ieee80211_local *local = sdata->local; 1558 int ret, err; 1559 enum nl80211_iftype internal_type = type; 1560 bool p2p = false; 1561 1562 ASSERT_RTNL(); 1563 1564 if (!local->ops->change_interface) 1565 return -EBUSY; 1566 1567 switch (sdata->vif.type) { 1568 case NL80211_IFTYPE_AP: 1569 case NL80211_IFTYPE_STATION: 1570 case NL80211_IFTYPE_ADHOC: 1571 case NL80211_IFTYPE_OCB: 1572 /* 1573 * Could maybe also all others here? 1574 * Just not sure how that interacts 1575 * with the RX/config path e.g. for 1576 * mesh. 1577 */ 1578 break; 1579 default: 1580 return -EBUSY; 1581 } 1582 1583 switch (type) { 1584 case NL80211_IFTYPE_AP: 1585 case NL80211_IFTYPE_STATION: 1586 case NL80211_IFTYPE_ADHOC: 1587 case NL80211_IFTYPE_OCB: 1588 /* 1589 * Could probably support everything 1590 * but WDS here (WDS do_open can fail 1591 * under memory pressure, which this 1592 * code isn't prepared to handle). 1593 */ 1594 break; 1595 case NL80211_IFTYPE_P2P_CLIENT: 1596 p2p = true; 1597 internal_type = NL80211_IFTYPE_STATION; 1598 break; 1599 case NL80211_IFTYPE_P2P_GO: 1600 p2p = true; 1601 internal_type = NL80211_IFTYPE_AP; 1602 break; 1603 default: 1604 return -EBUSY; 1605 } 1606 1607 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1608 if (ret) 1609 return ret; 1610 1611 ieee80211_do_stop(sdata, false); 1612 1613 ieee80211_teardown_sdata(sdata); 1614 1615 ret = drv_change_interface(local, sdata, internal_type, p2p); 1616 if (ret) 1617 type = ieee80211_vif_type_p2p(&sdata->vif); 1618 1619 /* 1620 * Ignore return value here, there's not much we can do since 1621 * the driver changed the interface type internally already. 1622 * The warnings will hopefully make driver authors fix it :-) 1623 */ 1624 ieee80211_check_queues(sdata, type); 1625 1626 ieee80211_setup_sdata(sdata, type); 1627 1628 err = ieee80211_do_open(&sdata->wdev, false); 1629 WARN(err, "type change: do_open returned %d", err); 1630 1631 return ret; 1632 } 1633 1634 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1635 enum nl80211_iftype type) 1636 { 1637 int ret; 1638 1639 ASSERT_RTNL(); 1640 1641 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1642 return 0; 1643 1644 if (ieee80211_sdata_running(sdata)) { 1645 ret = ieee80211_runtime_change_iftype(sdata, type); 1646 if (ret) 1647 return ret; 1648 } else { 1649 /* Purge and reset type-dependent state. */ 1650 ieee80211_teardown_sdata(sdata); 1651 ieee80211_setup_sdata(sdata, type); 1652 } 1653 1654 /* reset some values that shouldn't be kept across type changes */ 1655 if (type == NL80211_IFTYPE_STATION) 1656 sdata->u.mgd.use_4addr = false; 1657 1658 return 0; 1659 } 1660 1661 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1662 u8 *perm_addr, enum nl80211_iftype type) 1663 { 1664 struct ieee80211_sub_if_data *sdata; 1665 u64 mask, start, addr, val, inc; 1666 u8 *m; 1667 u8 tmp_addr[ETH_ALEN]; 1668 int i; 1669 1670 /* default ... something at least */ 1671 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1672 1673 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1674 local->hw.wiphy->n_addresses <= 1) 1675 return; 1676 1677 mutex_lock(&local->iflist_mtx); 1678 1679 switch (type) { 1680 case NL80211_IFTYPE_MONITOR: 1681 /* doesn't matter */ 1682 break; 1683 case NL80211_IFTYPE_WDS: 1684 case NL80211_IFTYPE_AP_VLAN: 1685 /* match up with an AP interface */ 1686 list_for_each_entry(sdata, &local->interfaces, list) { 1687 if (sdata->vif.type != NL80211_IFTYPE_AP) 1688 continue; 1689 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1690 break; 1691 } 1692 /* keep default if no AP interface present */ 1693 break; 1694 case NL80211_IFTYPE_P2P_CLIENT: 1695 case NL80211_IFTYPE_P2P_GO: 1696 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1697 list_for_each_entry(sdata, &local->interfaces, list) { 1698 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1699 continue; 1700 if (!ieee80211_sdata_running(sdata)) 1701 continue; 1702 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1703 goto out_unlock; 1704 } 1705 } 1706 /* fall through */ 1707 default: 1708 /* assign a new address if possible -- try n_addresses first */ 1709 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1710 bool used = false; 1711 1712 list_for_each_entry(sdata, &local->interfaces, list) { 1713 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1714 sdata->vif.addr)) { 1715 used = true; 1716 break; 1717 } 1718 } 1719 1720 if (!used) { 1721 memcpy(perm_addr, 1722 local->hw.wiphy->addresses[i].addr, 1723 ETH_ALEN); 1724 break; 1725 } 1726 } 1727 1728 /* try mask if available */ 1729 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1730 break; 1731 1732 m = local->hw.wiphy->addr_mask; 1733 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1734 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1735 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1736 1737 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1738 /* not a contiguous mask ... not handled now! */ 1739 pr_info("not contiguous\n"); 1740 break; 1741 } 1742 1743 /* 1744 * Pick address of existing interface in case user changed 1745 * MAC address manually, default to perm_addr. 1746 */ 1747 m = local->hw.wiphy->perm_addr; 1748 list_for_each_entry(sdata, &local->interfaces, list) { 1749 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1750 continue; 1751 m = sdata->vif.addr; 1752 break; 1753 } 1754 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1755 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1756 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1757 1758 inc = 1ULL<<__ffs64(mask); 1759 val = (start & mask); 1760 addr = (start & ~mask) | (val & mask); 1761 do { 1762 bool used = false; 1763 1764 tmp_addr[5] = addr >> 0*8; 1765 tmp_addr[4] = addr >> 1*8; 1766 tmp_addr[3] = addr >> 2*8; 1767 tmp_addr[2] = addr >> 3*8; 1768 tmp_addr[1] = addr >> 4*8; 1769 tmp_addr[0] = addr >> 5*8; 1770 1771 val += inc; 1772 1773 list_for_each_entry(sdata, &local->interfaces, list) { 1774 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1775 used = true; 1776 break; 1777 } 1778 } 1779 1780 if (!used) { 1781 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1782 break; 1783 } 1784 addr = (start & ~mask) | (val & mask); 1785 } while (addr != start); 1786 1787 break; 1788 } 1789 1790 out_unlock: 1791 mutex_unlock(&local->iflist_mtx); 1792 } 1793 1794 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1795 unsigned char name_assign_type, 1796 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1797 struct vif_params *params) 1798 { 1799 struct net_device *ndev = NULL; 1800 struct ieee80211_sub_if_data *sdata = NULL; 1801 struct txq_info *txqi; 1802 void (*if_setup)(struct net_device *dev); 1803 int ret, i; 1804 int txqs = 1; 1805 1806 ASSERT_RTNL(); 1807 1808 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1809 struct wireless_dev *wdev; 1810 1811 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1812 GFP_KERNEL); 1813 if (!sdata) 1814 return -ENOMEM; 1815 wdev = &sdata->wdev; 1816 1817 sdata->dev = NULL; 1818 strlcpy(sdata->name, name, IFNAMSIZ); 1819 ieee80211_assign_perm_addr(local, wdev->address, type); 1820 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1821 } else { 1822 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1823 sizeof(void *)); 1824 int txq_size = 0; 1825 1826 if (local->ops->wake_tx_queue && 1827 type != NL80211_IFTYPE_AP_VLAN && 1828 (type != NL80211_IFTYPE_MONITOR || 1829 (params->flags & MONITOR_FLAG_ACTIVE))) 1830 txq_size += sizeof(struct txq_info) + 1831 local->hw.txq_data_size; 1832 1833 if (local->ops->wake_tx_queue) { 1834 if_setup = ieee80211_if_setup_no_queue; 1835 } else { 1836 if_setup = ieee80211_if_setup; 1837 if (local->hw.queues >= IEEE80211_NUM_ACS) 1838 txqs = IEEE80211_NUM_ACS; 1839 } 1840 1841 ndev = alloc_netdev_mqs(size + txq_size, 1842 name, name_assign_type, 1843 if_setup, txqs, 1); 1844 if (!ndev) 1845 return -ENOMEM; 1846 1847 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 1848 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 1849 1850 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1851 1852 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1853 if (!ndev->tstats) { 1854 free_netdev(ndev); 1855 return -ENOMEM; 1856 } 1857 1858 ndev->needed_headroom = local->tx_headroom + 1859 4*6 /* four MAC addresses */ 1860 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1861 + 6 /* mesh */ 1862 + 8 /* rfc1042/bridge tunnel */ 1863 - ETH_HLEN /* ethernet hard_header_len */ 1864 + IEEE80211_ENCRYPT_HEADROOM; 1865 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1866 1867 ret = dev_alloc_name(ndev, ndev->name); 1868 if (ret < 0) { 1869 ieee80211_if_free(ndev); 1870 free_netdev(ndev); 1871 return ret; 1872 } 1873 1874 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1875 if (is_valid_ether_addr(params->macaddr)) 1876 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1877 else 1878 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1879 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1880 1881 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1882 sdata = netdev_priv(ndev); 1883 ndev->ieee80211_ptr = &sdata->wdev; 1884 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1885 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1886 1887 if (txq_size) { 1888 txqi = netdev_priv(ndev) + size; 1889 ieee80211_txq_init(sdata, NULL, txqi, 0); 1890 } 1891 1892 sdata->dev = ndev; 1893 } 1894 1895 /* initialise type-independent data */ 1896 sdata->wdev.wiphy = local->hw.wiphy; 1897 sdata->local = local; 1898 1899 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1900 skb_queue_head_init(&sdata->fragments[i].skb_list); 1901 1902 INIT_LIST_HEAD(&sdata->key_list); 1903 1904 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1905 ieee80211_dfs_cac_timer_work); 1906 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1907 ieee80211_delayed_tailroom_dec); 1908 1909 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1910 struct ieee80211_supported_band *sband; 1911 sband = local->hw.wiphy->bands[i]; 1912 sdata->rc_rateidx_mask[i] = 1913 sband ? (1 << sband->n_bitrates) - 1 : 0; 1914 if (sband) { 1915 __le16 cap; 1916 u16 *vht_rate_mask; 1917 1918 memcpy(sdata->rc_rateidx_mcs_mask[i], 1919 sband->ht_cap.mcs.rx_mask, 1920 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1921 1922 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1923 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1924 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1925 } else { 1926 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1927 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1928 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1929 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1930 } 1931 } 1932 1933 ieee80211_set_default_queues(sdata); 1934 1935 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1936 sdata->user_power_level = local->user_power_level; 1937 1938 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1939 1940 /* setup type-dependent data */ 1941 ieee80211_setup_sdata(sdata, type); 1942 1943 if (ndev) { 1944 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1945 if (type == NL80211_IFTYPE_STATION) 1946 sdata->u.mgd.use_4addr = params->use_4addr; 1947 1948 ndev->features |= local->hw.netdev_features; 1949 ndev->hw_features |= ndev->features & 1950 MAC80211_SUPPORTED_FEATURES_TX; 1951 1952 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1953 1954 /* MTU range: 256 - 2304 */ 1955 ndev->min_mtu = 256; 1956 ndev->max_mtu = local->hw.max_mtu; 1957 1958 ret = register_netdevice(ndev); 1959 if (ret) { 1960 free_netdev(ndev); 1961 return ret; 1962 } 1963 } 1964 1965 mutex_lock(&local->iflist_mtx); 1966 list_add_tail_rcu(&sdata->list, &local->interfaces); 1967 mutex_unlock(&local->iflist_mtx); 1968 1969 if (new_wdev) 1970 *new_wdev = &sdata->wdev; 1971 1972 return 0; 1973 } 1974 1975 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1976 { 1977 ASSERT_RTNL(); 1978 1979 mutex_lock(&sdata->local->iflist_mtx); 1980 list_del_rcu(&sdata->list); 1981 mutex_unlock(&sdata->local->iflist_mtx); 1982 1983 if (sdata->vif.txq) 1984 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 1985 1986 synchronize_rcu(); 1987 1988 if (sdata->dev) { 1989 unregister_netdevice(sdata->dev); 1990 } else { 1991 cfg80211_unregister_wdev(&sdata->wdev); 1992 ieee80211_teardown_sdata(sdata); 1993 kfree(sdata); 1994 } 1995 } 1996 1997 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1998 { 1999 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2000 return; 2001 ieee80211_do_stop(sdata, true); 2002 } 2003 2004 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2005 { 2006 struct ieee80211_sub_if_data *sdata, *tmp; 2007 LIST_HEAD(unreg_list); 2008 LIST_HEAD(wdev_list); 2009 2010 ASSERT_RTNL(); 2011 2012 /* Before destroying the interfaces, make sure they're all stopped so 2013 * that the hardware is stopped. Otherwise, the driver might still be 2014 * iterating the interfaces during the shutdown, e.g. from a worker 2015 * or from RX processing or similar, and if it does so (using atomic 2016 * iteration) while we're manipulating the list, the iteration will 2017 * crash. 2018 * 2019 * After this, the hardware should be stopped and the driver should 2020 * have stopped all of its activities, so that we can do RCU-unaware 2021 * manipulations of the interface list below. 2022 */ 2023 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2024 2025 WARN(local->open_count, "%s: open count remains %d\n", 2026 wiphy_name(local->hw.wiphy), local->open_count); 2027 2028 ieee80211_txq_teardown_flows(local); 2029 2030 mutex_lock(&local->iflist_mtx); 2031 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2032 list_del(&sdata->list); 2033 2034 if (sdata->dev) 2035 unregister_netdevice_queue(sdata->dev, &unreg_list); 2036 else 2037 list_add(&sdata->list, &wdev_list); 2038 } 2039 mutex_unlock(&local->iflist_mtx); 2040 unregister_netdevice_many(&unreg_list); 2041 2042 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2043 list_del(&sdata->list); 2044 cfg80211_unregister_wdev(&sdata->wdev); 2045 kfree(sdata); 2046 } 2047 } 2048 2049 static int netdev_notify(struct notifier_block *nb, 2050 unsigned long state, void *ptr) 2051 { 2052 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2053 struct ieee80211_sub_if_data *sdata; 2054 2055 if (state != NETDEV_CHANGENAME) 2056 return NOTIFY_DONE; 2057 2058 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2059 return NOTIFY_DONE; 2060 2061 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2062 return NOTIFY_DONE; 2063 2064 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2065 memcpy(sdata->name, dev->name, IFNAMSIZ); 2066 ieee80211_debugfs_rename_netdev(sdata); 2067 2068 return NOTIFY_OK; 2069 } 2070 2071 static struct notifier_block mac80211_netdev_notifier = { 2072 .notifier_call = netdev_notify, 2073 }; 2074 2075 int ieee80211_iface_init(void) 2076 { 2077 return register_netdevice_notifier(&mac80211_netdev_notifier); 2078 } 2079 2080 void ieee80211_iface_exit(void) 2081 { 2082 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2083 } 2084 2085 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2086 { 2087 if (sdata->vif.type == NL80211_IFTYPE_AP) 2088 atomic_inc(&sdata->u.ap.num_mcast_sta); 2089 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2090 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2091 } 2092 2093 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2094 { 2095 if (sdata->vif.type == NL80211_IFTYPE_AP) 2096 atomic_dec(&sdata->u.ap.num_mcast_sta); 2097 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2098 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2099 } 2100