rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Interface handling |
| 3 | * |
| 4 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 5 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 6 | * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> |
| 7 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
| 8 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
| 9 | * Copyright (c) 2016 Intel Deutschland GmbH |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | */ |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/if_arp.h> |
| 18 | #include <linux/netdevice.h> |
| 19 | #include <linux/rtnetlink.h> |
| 20 | #include <net/mac80211.h> |
| 21 | #include <net/ieee80211_radiotap.h> |
| 22 | #include "ieee80211_i.h" |
| 23 | #include "sta_info.h" |
| 24 | #include "debugfs_netdev.h" |
| 25 | #include "mesh.h" |
| 26 | #include "led.h" |
| 27 | #include "driver-ops.h" |
| 28 | #include "wme.h" |
| 29 | #include "rate.h" |
| 30 | |
| 31 | /** |
| 32 | * DOC: Interface list locking |
| 33 | * |
| 34 | * The interface list in each struct ieee80211_local is protected |
| 35 | * three-fold: |
| 36 | * |
| 37 | * (1) modifications may only be done under the RTNL |
| 38 | * (2) modifications and readers are protected against each other by |
| 39 | * the iflist_mtx. |
| 40 | * (3) modifications are done in an RCU manner so atomic readers |
| 41 | * can traverse the list in RCU-safe blocks. |
| 42 | * |
| 43 | * As a consequence, reads (traversals) of the list can be protected |
| 44 | * by either the RTNL, the iflist_mtx or RCU. |
| 45 | */ |
| 46 | |
| 47 | static void ieee80211_iface_work(struct work_struct *work); |
| 48 | |
| 49 | bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) |
| 50 | { |
| 51 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 52 | int power; |
| 53 | |
| 54 | rcu_read_lock(); |
| 55 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 56 | if (!chanctx_conf) { |
| 57 | rcu_read_unlock(); |
| 58 | return false; |
| 59 | } |
| 60 | |
| 61 | power = ieee80211_chandef_max_power(&chanctx_conf->def); |
| 62 | rcu_read_unlock(); |
| 63 | |
| 64 | if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) |
| 65 | power = min(power, sdata->user_power_level); |
| 66 | |
| 67 | if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) |
| 68 | power = min(power, sdata->ap_power_level); |
| 69 | |
| 70 | if (power != sdata->vif.bss_conf.txpower) { |
| 71 | sdata->vif.bss_conf.txpower = power; |
| 72 | ieee80211_hw_config(sdata->local, 0); |
| 73 | return true; |
| 74 | } |
| 75 | |
| 76 | return false; |
| 77 | } |
| 78 | |
| 79 | void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, |
| 80 | bool update_bss) |
| 81 | { |
| 82 | if (__ieee80211_recalc_txpower(sdata) || |
| 83 | (update_bss && ieee80211_sdata_running(sdata))) |
| 84 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); |
| 85 | } |
| 86 | |
| 87 | static u32 __ieee80211_idle_off(struct ieee80211_local *local) |
| 88 | { |
| 89 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) |
| 90 | return 0; |
| 91 | |
| 92 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; |
| 93 | return IEEE80211_CONF_CHANGE_IDLE; |
| 94 | } |
| 95 | |
| 96 | static u32 __ieee80211_idle_on(struct ieee80211_local *local) |
| 97 | { |
| 98 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) |
| 99 | return 0; |
| 100 | |
| 101 | ieee80211_flush_queues(local, NULL, false); |
| 102 | |
| 103 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
| 104 | return IEEE80211_CONF_CHANGE_IDLE; |
| 105 | } |
| 106 | |
| 107 | static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, |
| 108 | bool force_active) |
| 109 | { |
| 110 | bool working, scanning, active; |
| 111 | unsigned int led_trig_start = 0, led_trig_stop = 0; |
| 112 | |
| 113 | lockdep_assert_held(&local->mtx); |
| 114 | |
| 115 | active = force_active || |
| 116 | !list_empty(&local->chanctx_list) || |
| 117 | local->monitors; |
| 118 | |
| 119 | working = !local->ops->remain_on_channel && |
| 120 | !list_empty(&local->roc_list); |
| 121 | |
| 122 | scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || |
| 123 | test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); |
| 124 | |
| 125 | if (working || scanning) |
| 126 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; |
| 127 | else |
| 128 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; |
| 129 | |
| 130 | if (active) |
| 131 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; |
| 132 | else |
| 133 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; |
| 134 | |
| 135 | ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); |
| 136 | |
| 137 | if (working || scanning || active) |
| 138 | return __ieee80211_idle_off(local); |
| 139 | return __ieee80211_idle_on(local); |
| 140 | } |
| 141 | |
| 142 | u32 ieee80211_idle_off(struct ieee80211_local *local) |
| 143 | { |
| 144 | return __ieee80211_recalc_idle(local, true); |
| 145 | } |
| 146 | |
| 147 | void ieee80211_recalc_idle(struct ieee80211_local *local) |
| 148 | { |
| 149 | u32 change = __ieee80211_recalc_idle(local, false); |
| 150 | if (change) |
| 151 | ieee80211_hw_config(local, change); |
| 152 | } |
| 153 | |
| 154 | static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, |
| 155 | bool check_dup) |
| 156 | { |
| 157 | struct ieee80211_local *local = sdata->local; |
| 158 | struct ieee80211_sub_if_data *iter; |
| 159 | u64 new, mask, tmp; |
| 160 | u8 *m; |
| 161 | int ret = 0; |
| 162 | |
| 163 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) |
| 164 | return 0; |
| 165 | |
| 166 | m = addr; |
| 167 | new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 168 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 169 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 170 | |
| 171 | m = local->hw.wiphy->addr_mask; |
| 172 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 173 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 174 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 175 | |
| 176 | if (!check_dup) |
| 177 | return ret; |
| 178 | |
| 179 | mutex_lock(&local->iflist_mtx); |
| 180 | list_for_each_entry(iter, &local->interfaces, list) { |
| 181 | if (iter == sdata) |
| 182 | continue; |
| 183 | |
| 184 | if (iter->vif.type == NL80211_IFTYPE_MONITOR && |
| 185 | !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) |
| 186 | continue; |
| 187 | |
| 188 | m = iter->vif.addr; |
| 189 | tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 190 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 191 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 192 | |
| 193 | if ((new & ~mask) != (tmp & ~mask)) { |
| 194 | ret = -EINVAL; |
| 195 | break; |
| 196 | } |
| 197 | } |
| 198 | mutex_unlock(&local->iflist_mtx); |
| 199 | |
| 200 | return ret; |
| 201 | } |
| 202 | |
| 203 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
| 204 | { |
| 205 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 206 | struct sockaddr *sa = addr; |
| 207 | bool check_dup = true; |
| 208 | int ret; |
| 209 | |
| 210 | if (ieee80211_sdata_running(sdata)) |
| 211 | return -EBUSY; |
| 212 | |
| 213 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR && |
| 214 | !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) |
| 215 | check_dup = false; |
| 216 | |
| 217 | ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); |
| 218 | if (ret) |
| 219 | return ret; |
| 220 | |
| 221 | ret = eth_mac_addr(dev, sa); |
| 222 | |
| 223 | if (ret == 0) |
| 224 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
| 225 | |
| 226 | return ret; |
| 227 | } |
| 228 | |
| 229 | static inline int identical_mac_addr_allowed(int type1, int type2) |
| 230 | { |
| 231 | return type1 == NL80211_IFTYPE_MONITOR || |
| 232 | type2 == NL80211_IFTYPE_MONITOR || |
| 233 | type1 == NL80211_IFTYPE_P2P_DEVICE || |
| 234 | type2 == NL80211_IFTYPE_P2P_DEVICE || |
| 235 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
| 236 | (type1 == NL80211_IFTYPE_WDS && |
| 237 | (type2 == NL80211_IFTYPE_WDS || |
| 238 | type2 == NL80211_IFTYPE_AP)) || |
| 239 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || |
| 240 | (type1 == NL80211_IFTYPE_AP_VLAN && |
| 241 | (type2 == NL80211_IFTYPE_AP || |
| 242 | type2 == NL80211_IFTYPE_AP_VLAN)); |
| 243 | } |
| 244 | |
| 245 | static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, |
| 246 | enum nl80211_iftype iftype) |
| 247 | { |
| 248 | struct ieee80211_local *local = sdata->local; |
| 249 | struct ieee80211_sub_if_data *nsdata; |
| 250 | int ret; |
| 251 | |
| 252 | ASSERT_RTNL(); |
| 253 | |
| 254 | /* we hold the RTNL here so can safely walk the list */ |
| 255 | list_for_each_entry(nsdata, &local->interfaces, list) { |
| 256 | if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { |
| 257 | /* |
| 258 | * Only OCB and monitor mode may coexist |
| 259 | */ |
| 260 | if ((sdata->vif.type == NL80211_IFTYPE_OCB && |
| 261 | nsdata->vif.type != NL80211_IFTYPE_MONITOR) || |
| 262 | (sdata->vif.type != NL80211_IFTYPE_MONITOR && |
| 263 | nsdata->vif.type == NL80211_IFTYPE_OCB)) |
| 264 | return -EBUSY; |
| 265 | |
| 266 | /* |
| 267 | * Allow only a single IBSS interface to be up at any |
| 268 | * time. This is restricted because beacon distribution |
| 269 | * cannot work properly if both are in the same IBSS. |
| 270 | * |
| 271 | * To remove this restriction we'd have to disallow them |
| 272 | * from setting the same SSID on different IBSS interfaces |
| 273 | * belonging to the same hardware. Then, however, we're |
| 274 | * faced with having to adopt two different TSF timers... |
| 275 | */ |
| 276 | if (iftype == NL80211_IFTYPE_ADHOC && |
| 277 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 278 | return -EBUSY; |
| 279 | /* |
| 280 | * will not add another interface while any channel |
| 281 | * switch is active. |
| 282 | */ |
| 283 | if (nsdata->vif.csa_active) |
| 284 | return -EBUSY; |
| 285 | |
| 286 | /* |
| 287 | * The remaining checks are only performed for interfaces |
| 288 | * with the same MAC address. |
| 289 | */ |
| 290 | if (!ether_addr_equal(sdata->vif.addr, |
| 291 | nsdata->vif.addr)) |
| 292 | continue; |
| 293 | |
| 294 | /* |
| 295 | * check whether it may have the same address |
| 296 | */ |
| 297 | if (!identical_mac_addr_allowed(iftype, |
| 298 | nsdata->vif.type)) |
| 299 | return -ENOTUNIQ; |
| 300 | |
| 301 | /* |
| 302 | * can only add VLANs to enabled APs |
| 303 | */ |
| 304 | if (iftype == NL80211_IFTYPE_AP_VLAN && |
| 305 | nsdata->vif.type == NL80211_IFTYPE_AP) |
| 306 | sdata->bss = &nsdata->u.ap; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | mutex_lock(&local->chanctx_mtx); |
| 311 | ret = ieee80211_check_combinations(sdata, NULL, 0, 0); |
| 312 | mutex_unlock(&local->chanctx_mtx); |
| 313 | return ret; |
| 314 | } |
| 315 | |
| 316 | static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, |
| 317 | enum nl80211_iftype iftype) |
| 318 | { |
| 319 | int n_queues = sdata->local->hw.queues; |
| 320 | int i; |
| 321 | |
| 322 | if (iftype == NL80211_IFTYPE_NAN) |
| 323 | return 0; |
| 324 | |
| 325 | if (iftype != NL80211_IFTYPE_P2P_DEVICE) { |
| 326 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 327 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == |
| 328 | IEEE80211_INVAL_HW_QUEUE)) |
| 329 | return -EINVAL; |
| 330 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= |
| 331 | n_queues)) |
| 332 | return -EINVAL; |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | if ((iftype != NL80211_IFTYPE_AP && |
| 337 | iftype != NL80211_IFTYPE_P2P_GO && |
| 338 | iftype != NL80211_IFTYPE_MESH_POINT) || |
| 339 | !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { |
| 340 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) |
| 345 | return -EINVAL; |
| 346 | |
| 347 | if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) |
| 348 | return -EINVAL; |
| 349 | |
| 350 | return 0; |
| 351 | } |
| 352 | |
| 353 | void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, |
| 354 | const int offset) |
| 355 | { |
| 356 | struct ieee80211_local *local = sdata->local; |
| 357 | u32 flags = sdata->u.mntr.flags; |
| 358 | |
| 359 | #define ADJUST(_f, _s) do { \ |
| 360 | if (flags & MONITOR_FLAG_##_f) \ |
| 361 | local->fif_##_s += offset; \ |
| 362 | } while (0) |
| 363 | |
| 364 | ADJUST(FCSFAIL, fcsfail); |
| 365 | ADJUST(PLCPFAIL, plcpfail); |
| 366 | ADJUST(CONTROL, control); |
| 367 | ADJUST(CONTROL, pspoll); |
| 368 | ADJUST(OTHER_BSS, other_bss); |
| 369 | |
| 370 | #undef ADJUST |
| 371 | } |
| 372 | |
| 373 | static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) |
| 374 | { |
| 375 | struct ieee80211_local *local = sdata->local; |
| 376 | int i; |
| 377 | |
| 378 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 379 | if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
| 380 | sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; |
| 381 | else if (local->hw.queues >= IEEE80211_NUM_ACS) |
| 382 | sdata->vif.hw_queue[i] = i; |
| 383 | else |
| 384 | sdata->vif.hw_queue[i] = 0; |
| 385 | } |
| 386 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
| 387 | } |
| 388 | |
| 389 | int ieee80211_add_virtual_monitor(struct ieee80211_local *local) |
| 390 | { |
| 391 | struct ieee80211_sub_if_data *sdata; |
| 392 | int ret; |
| 393 | |
| 394 | if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) |
| 395 | return 0; |
| 396 | |
| 397 | ASSERT_RTNL(); |
| 398 | |
| 399 | if (local->monitor_sdata) |
| 400 | return 0; |
| 401 | |
| 402 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); |
| 403 | if (!sdata) |
| 404 | return -ENOMEM; |
| 405 | |
| 406 | /* set up data */ |
| 407 | sdata->local = local; |
| 408 | sdata->vif.type = NL80211_IFTYPE_MONITOR; |
| 409 | snprintf(sdata->name, IFNAMSIZ, "%s-monitor", |
| 410 | wiphy_name(local->hw.wiphy)); |
| 411 | sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; |
| 412 | |
| 413 | sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
| 414 | |
| 415 | ieee80211_set_default_queues(sdata); |
| 416 | |
| 417 | ret = drv_add_interface(local, sdata); |
| 418 | if (WARN_ON(ret)) { |
| 419 | /* ok .. stupid driver, it asked for this! */ |
| 420 | kfree(sdata); |
| 421 | return ret; |
| 422 | } |
| 423 | |
| 424 | ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); |
| 425 | if (ret) { |
| 426 | kfree(sdata); |
| 427 | return ret; |
| 428 | } |
| 429 | |
| 430 | mutex_lock(&local->iflist_mtx); |
| 431 | rcu_assign_pointer(local->monitor_sdata, sdata); |
| 432 | mutex_unlock(&local->iflist_mtx); |
| 433 | |
| 434 | mutex_lock(&local->mtx); |
| 435 | ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, |
| 436 | IEEE80211_CHANCTX_EXCLUSIVE); |
| 437 | mutex_unlock(&local->mtx); |
| 438 | if (ret) { |
| 439 | mutex_lock(&local->iflist_mtx); |
| 440 | RCU_INIT_POINTER(local->monitor_sdata, NULL); |
| 441 | mutex_unlock(&local->iflist_mtx); |
| 442 | synchronize_net(); |
| 443 | drv_remove_interface(local, sdata); |
| 444 | kfree(sdata); |
| 445 | return ret; |
| 446 | } |
| 447 | |
| 448 | skb_queue_head_init(&sdata->skb_queue); |
| 449 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
| 450 | |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | void ieee80211_del_virtual_monitor(struct ieee80211_local *local) |
| 455 | { |
| 456 | struct ieee80211_sub_if_data *sdata; |
| 457 | |
| 458 | if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) |
| 459 | return; |
| 460 | |
| 461 | ASSERT_RTNL(); |
| 462 | |
| 463 | mutex_lock(&local->iflist_mtx); |
| 464 | |
| 465 | sdata = rcu_dereference_protected(local->monitor_sdata, |
| 466 | lockdep_is_held(&local->iflist_mtx)); |
| 467 | if (!sdata) { |
| 468 | mutex_unlock(&local->iflist_mtx); |
| 469 | return; |
| 470 | } |
| 471 | |
| 472 | RCU_INIT_POINTER(local->monitor_sdata, NULL); |
| 473 | mutex_unlock(&local->iflist_mtx); |
| 474 | |
| 475 | synchronize_net(); |
| 476 | |
| 477 | mutex_lock(&local->mtx); |
| 478 | ieee80211_vif_release_channel(sdata); |
| 479 | mutex_unlock(&local->mtx); |
| 480 | |
| 481 | drv_remove_interface(local, sdata); |
| 482 | |
| 483 | kfree(sdata); |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * NOTE: Be very careful when changing this function, it must NOT return |
| 488 | * an error on interface type changes that have been pre-checked, so most |
| 489 | * checks should be in ieee80211_check_concurrent_iface. |
| 490 | */ |
| 491 | int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) |
| 492 | { |
| 493 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); |
| 494 | struct net_device *dev = wdev->netdev; |
| 495 | struct ieee80211_local *local = sdata->local; |
| 496 | struct sta_info *sta; |
| 497 | u32 changed = 0; |
| 498 | int res; |
| 499 | u32 hw_reconf_flags = 0; |
| 500 | |
| 501 | switch (sdata->vif.type) { |
| 502 | case NL80211_IFTYPE_WDS: |
| 503 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) |
| 504 | return -ENOLINK; |
| 505 | break; |
| 506 | case NL80211_IFTYPE_AP_VLAN: { |
| 507 | struct ieee80211_sub_if_data *master; |
| 508 | |
| 509 | if (!sdata->bss) |
| 510 | return -ENOLINK; |
| 511 | |
| 512 | mutex_lock(&local->mtx); |
| 513 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
| 514 | mutex_unlock(&local->mtx); |
| 515 | |
| 516 | master = container_of(sdata->bss, |
| 517 | struct ieee80211_sub_if_data, u.ap); |
| 518 | sdata->control_port_protocol = |
| 519 | master->control_port_protocol; |
| 520 | sdata->control_port_no_encrypt = |
| 521 | master->control_port_no_encrypt; |
| 522 | sdata->vif.cab_queue = master->vif.cab_queue; |
| 523 | memcpy(sdata->vif.hw_queue, master->vif.hw_queue, |
| 524 | sizeof(sdata->vif.hw_queue)); |
| 525 | sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; |
| 526 | |
| 527 | mutex_lock(&local->key_mtx); |
| 528 | sdata->crypto_tx_tailroom_needed_cnt += |
| 529 | master->crypto_tx_tailroom_needed_cnt; |
| 530 | mutex_unlock(&local->key_mtx); |
| 531 | |
| 532 | break; |
| 533 | } |
| 534 | case NL80211_IFTYPE_AP: |
| 535 | sdata->bss = &sdata->u.ap; |
| 536 | break; |
| 537 | case NL80211_IFTYPE_MESH_POINT: |
| 538 | case NL80211_IFTYPE_STATION: |
| 539 | case NL80211_IFTYPE_MONITOR: |
| 540 | case NL80211_IFTYPE_ADHOC: |
| 541 | case NL80211_IFTYPE_P2P_DEVICE: |
| 542 | case NL80211_IFTYPE_OCB: |
| 543 | case NL80211_IFTYPE_NAN: |
| 544 | /* no special treatment */ |
| 545 | break; |
| 546 | case NL80211_IFTYPE_UNSPECIFIED: |
| 547 | case NUM_NL80211_IFTYPES: |
| 548 | case NL80211_IFTYPE_P2P_CLIENT: |
| 549 | case NL80211_IFTYPE_P2P_GO: |
| 550 | /* cannot happen */ |
| 551 | WARN_ON(1); |
| 552 | break; |
| 553 | } |
| 554 | |
| 555 | if (local->open_count == 0) { |
| 556 | res = drv_start(local); |
| 557 | if (res) |
| 558 | goto err_del_bss; |
| 559 | /* we're brought up, everything changes */ |
| 560 | hw_reconf_flags = ~0; |
| 561 | ieee80211_led_radio(local, true); |
| 562 | ieee80211_mod_tpt_led_trig(local, |
| 563 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * Copy the hopefully now-present MAC address to |
| 568 | * this interface, if it has the special null one. |
| 569 | */ |
| 570 | if (dev && is_zero_ether_addr(dev->dev_addr)) { |
| 571 | memcpy(dev->dev_addr, |
| 572 | local->hw.wiphy->perm_addr, |
| 573 | ETH_ALEN); |
| 574 | memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); |
| 575 | |
| 576 | if (!is_valid_ether_addr(dev->dev_addr)) { |
| 577 | res = -EADDRNOTAVAIL; |
| 578 | goto err_stop; |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | switch (sdata->vif.type) { |
| 583 | case NL80211_IFTYPE_AP_VLAN: |
| 584 | /* no need to tell driver, but set carrier and chanctx */ |
| 585 | if (rtnl_dereference(sdata->bss->beacon)) { |
| 586 | ieee80211_vif_vlan_copy_chanctx(sdata); |
| 587 | netif_carrier_on(dev); |
| 588 | } else { |
| 589 | netif_carrier_off(dev); |
| 590 | } |
| 591 | break; |
| 592 | case NL80211_IFTYPE_MONITOR: |
| 593 | if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { |
| 594 | local->cooked_mntrs++; |
| 595 | break; |
| 596 | } |
| 597 | |
| 598 | if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { |
| 599 | res = drv_add_interface(local, sdata); |
| 600 | if (res) |
| 601 | goto err_stop; |
| 602 | } else if (local->monitors == 0 && local->open_count == 0) { |
| 603 | res = ieee80211_add_virtual_monitor(local); |
| 604 | if (res) |
| 605 | goto err_stop; |
| 606 | } |
| 607 | |
| 608 | /* must be before the call to ieee80211_configure_filter */ |
| 609 | local->monitors++; |
| 610 | if (local->monitors == 1) { |
| 611 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
| 612 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
| 613 | } |
| 614 | |
| 615 | ieee80211_adjust_monitor_flags(sdata, 1); |
| 616 | ieee80211_configure_filter(local); |
| 617 | mutex_lock(&local->mtx); |
| 618 | ieee80211_recalc_idle(local); |
| 619 | mutex_unlock(&local->mtx); |
| 620 | |
| 621 | netif_carrier_on(dev); |
| 622 | break; |
| 623 | default: |
| 624 | if (coming_up) { |
| 625 | ieee80211_del_virtual_monitor(local); |
| 626 | |
| 627 | res = drv_add_interface(local, sdata); |
| 628 | if (res) |
| 629 | goto err_stop; |
| 630 | res = ieee80211_check_queues(sdata, |
| 631 | ieee80211_vif_type_p2p(&sdata->vif)); |
| 632 | if (res) |
| 633 | goto err_del_interface; |
| 634 | } |
| 635 | |
| 636 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 637 | local->fif_pspoll++; |
| 638 | local->fif_probe_req++; |
| 639 | |
| 640 | ieee80211_configure_filter(local); |
| 641 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
| 642 | local->fif_probe_req++; |
| 643 | } |
| 644 | |
| 645 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && |
| 646 | sdata->vif.type != NL80211_IFTYPE_NAN) |
| 647 | changed |= ieee80211_reset_erp_info(sdata); |
| 648 | ieee80211_bss_info_change_notify(sdata, changed); |
| 649 | |
| 650 | switch (sdata->vif.type) { |
| 651 | case NL80211_IFTYPE_STATION: |
| 652 | case NL80211_IFTYPE_ADHOC: |
| 653 | case NL80211_IFTYPE_AP: |
| 654 | case NL80211_IFTYPE_MESH_POINT: |
| 655 | case NL80211_IFTYPE_OCB: |
| 656 | netif_carrier_off(dev); |
| 657 | break; |
| 658 | case NL80211_IFTYPE_WDS: |
| 659 | case NL80211_IFTYPE_P2P_DEVICE: |
| 660 | case NL80211_IFTYPE_NAN: |
| 661 | break; |
| 662 | default: |
| 663 | /* not reached */ |
| 664 | WARN_ON(1); |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * Set default queue parameters so drivers don't |
| 669 | * need to initialise the hardware if the hardware |
| 670 | * doesn't start up with sane defaults. |
| 671 | * Enable QoS for anything but station interfaces. |
| 672 | */ |
| 673 | ieee80211_set_wmm_default(sdata, true, |
| 674 | sdata->vif.type != NL80211_IFTYPE_STATION); |
| 675 | } |
| 676 | |
| 677 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
| 678 | |
| 679 | switch (sdata->vif.type) { |
| 680 | case NL80211_IFTYPE_WDS: |
| 681 | /* Create STA entry for the WDS peer */ |
| 682 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, |
| 683 | GFP_KERNEL); |
| 684 | if (!sta) { |
| 685 | res = -ENOMEM; |
| 686 | goto err_del_interface; |
| 687 | } |
| 688 | |
| 689 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
| 690 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); |
| 691 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); |
| 692 | |
| 693 | res = sta_info_insert(sta); |
| 694 | if (res) { |
| 695 | /* STA has been freed */ |
| 696 | goto err_del_interface; |
| 697 | } |
| 698 | |
| 699 | rate_control_rate_init(sta); |
| 700 | netif_carrier_on(dev); |
| 701 | break; |
| 702 | case NL80211_IFTYPE_P2P_DEVICE: |
| 703 | rcu_assign_pointer(local->p2p_sdata, sdata); |
| 704 | break; |
| 705 | case NL80211_IFTYPE_MONITOR: |
| 706 | if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) |
| 707 | break; |
| 708 | list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); |
| 709 | break; |
| 710 | default: |
| 711 | break; |
| 712 | } |
| 713 | |
| 714 | /* |
| 715 | * set_multicast_list will be invoked by the networking core |
| 716 | * which will check whether any increments here were done in |
| 717 | * error and sync them down to the hardware as filter flags. |
| 718 | */ |
| 719 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| 720 | atomic_inc(&local->iff_allmultis); |
| 721 | |
| 722 | if (coming_up) |
| 723 | local->open_count++; |
| 724 | |
| 725 | if (hw_reconf_flags) |
| 726 | ieee80211_hw_config(local, hw_reconf_flags); |
| 727 | |
| 728 | ieee80211_recalc_ps(local); |
| 729 | |
| 730 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
| 731 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| 732 | local->ops->wake_tx_queue) { |
| 733 | /* XXX: for AP_VLAN, actually track AP queues */ |
| 734 | if (dev) |
| 735 | netif_tx_start_all_queues(dev); |
| 736 | } else if (dev) { |
| 737 | unsigned long flags; |
| 738 | int n_acs = IEEE80211_NUM_ACS; |
| 739 | int ac; |
| 740 | |
| 741 | if (local->hw.queues < IEEE80211_NUM_ACS) |
| 742 | n_acs = 1; |
| 743 | |
| 744 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 745 | if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || |
| 746 | (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && |
| 747 | skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { |
| 748 | for (ac = 0; ac < n_acs; ac++) { |
| 749 | int ac_queue = sdata->vif.hw_queue[ac]; |
| 750 | |
| 751 | if (local->queue_stop_reasons[ac_queue] == 0 && |
| 752 | skb_queue_empty(&local->pending[ac_queue])) |
| 753 | netif_start_subqueue(dev, ac); |
| 754 | } |
| 755 | } |
| 756 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 757 | } |
| 758 | |
| 759 | return 0; |
| 760 | err_del_interface: |
| 761 | drv_remove_interface(local, sdata); |
| 762 | err_stop: |
| 763 | if (!local->open_count) |
| 764 | drv_stop(local); |
| 765 | err_del_bss: |
| 766 | sdata->bss = NULL; |
| 767 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
| 768 | mutex_lock(&local->mtx); |
| 769 | list_del(&sdata->u.vlan.list); |
| 770 | mutex_unlock(&local->mtx); |
| 771 | } |
| 772 | /* might already be clear but that doesn't matter */ |
| 773 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
| 774 | return res; |
| 775 | } |
| 776 | |
| 777 | static int ieee80211_open(struct net_device *dev) |
| 778 | { |
| 779 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 780 | int err; |
| 781 | |
| 782 | /* fail early if user set an invalid address */ |
| 783 | if (!is_valid_ether_addr(dev->dev_addr)) |
| 784 | return -EADDRNOTAVAIL; |
| 785 | |
| 786 | err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); |
| 787 | if (err) |
| 788 | return err; |
| 789 | |
| 790 | return ieee80211_do_open(&sdata->wdev, true); |
| 791 | } |
| 792 | |
| 793 | static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, |
| 794 | bool going_down) |
| 795 | { |
| 796 | struct ieee80211_sub_if_data *txq_sdata = sdata; |
| 797 | struct ieee80211_local *local = sdata->local; |
| 798 | struct fq *fq = &local->fq; |
| 799 | unsigned long flags; |
| 800 | struct sk_buff *skb, *tmp; |
| 801 | u32 hw_reconf_flags = 0; |
| 802 | int i, flushed; |
| 803 | struct ps_data *ps; |
| 804 | struct cfg80211_chan_def chandef; |
| 805 | bool cancel_scan; |
| 806 | struct cfg80211_nan_func *func; |
| 807 | |
| 808 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
| 809 | |
| 810 | cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; |
| 811 | if (cancel_scan) |
| 812 | ieee80211_scan_cancel(local); |
| 813 | |
| 814 | /* |
| 815 | * Stop TX on this interface first. |
| 816 | */ |
| 817 | if (sdata->dev) |
| 818 | netif_tx_stop_all_queues(sdata->dev); |
| 819 | |
| 820 | ieee80211_roc_purge(local, sdata); |
| 821 | |
| 822 | switch (sdata->vif.type) { |
| 823 | case NL80211_IFTYPE_STATION: |
| 824 | ieee80211_mgd_stop(sdata); |
| 825 | break; |
| 826 | case NL80211_IFTYPE_ADHOC: |
| 827 | ieee80211_ibss_stop(sdata); |
| 828 | break; |
| 829 | case NL80211_IFTYPE_AP: |
| 830 | cancel_work_sync(&sdata->u.ap.request_smps_work); |
| 831 | break; |
| 832 | case NL80211_IFTYPE_MONITOR: |
| 833 | if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) |
| 834 | break; |
| 835 | list_del_rcu(&sdata->u.mntr.list); |
| 836 | break; |
| 837 | default: |
| 838 | break; |
| 839 | } |
| 840 | |
| 841 | /* |
| 842 | * Remove all stations associated with this interface. |
| 843 | * |
| 844 | * This must be done before calling ops->remove_interface() |
| 845 | * because otherwise we can later invoke ops->sta_notify() |
| 846 | * whenever the STAs are removed, and that invalidates driver |
| 847 | * assumptions about always getting a vif pointer that is valid |
| 848 | * (because if we remove a STA after ops->remove_interface() |
| 849 | * the driver will have removed the vif info already!) |
| 850 | * |
| 851 | * In WDS mode a station must exist here and be flushed, for |
| 852 | * AP_VLANs stations may exist since there's nothing else that |
| 853 | * would have removed them, but in other modes there shouldn't |
| 854 | * be any stations. |
| 855 | */ |
| 856 | flushed = sta_info_flush(sdata); |
| 857 | WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 858 | ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || |
| 859 | (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); |
| 860 | |
| 861 | /* don't count this interface for allmulti while it is down */ |
| 862 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| 863 | atomic_dec(&local->iff_allmultis); |
| 864 | |
| 865 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 866 | local->fif_pspoll--; |
| 867 | local->fif_probe_req--; |
| 868 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
| 869 | local->fif_probe_req--; |
| 870 | } |
| 871 | |
| 872 | if (sdata->dev) { |
| 873 | netif_addr_lock_bh(sdata->dev); |
| 874 | spin_lock_bh(&local->filter_lock); |
| 875 | __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, |
| 876 | sdata->dev->addr_len); |
| 877 | spin_unlock_bh(&local->filter_lock); |
| 878 | netif_addr_unlock_bh(sdata->dev); |
| 879 | } |
| 880 | |
| 881 | del_timer_sync(&local->dynamic_ps_timer); |
| 882 | cancel_work_sync(&local->dynamic_ps_enable_work); |
| 883 | |
| 884 | cancel_work_sync(&sdata->recalc_smps); |
| 885 | sdata_lock(sdata); |
| 886 | mutex_lock(&local->mtx); |
| 887 | sdata->vif.csa_active = false; |
| 888 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 889 | sdata->u.mgd.csa_waiting_bcn = false; |
| 890 | if (sdata->csa_block_tx) { |
| 891 | ieee80211_wake_vif_queues(local, sdata, |
| 892 | IEEE80211_QUEUE_STOP_REASON_CSA); |
| 893 | sdata->csa_block_tx = false; |
| 894 | } |
| 895 | mutex_unlock(&local->mtx); |
| 896 | sdata_unlock(sdata); |
| 897 | |
| 898 | cancel_work_sync(&sdata->csa_finalize_work); |
| 899 | |
| 900 | cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); |
| 901 | |
| 902 | if (sdata->wdev.cac_started) { |
| 903 | chandef = sdata->vif.bss_conf.chandef; |
| 904 | WARN_ON(local->suspended); |
| 905 | mutex_lock(&local->mtx); |
| 906 | ieee80211_vif_release_channel(sdata); |
| 907 | mutex_unlock(&local->mtx); |
| 908 | cfg80211_cac_event(sdata->dev, &chandef, |
| 909 | NL80211_RADAR_CAC_ABORTED, |
| 910 | GFP_KERNEL); |
| 911 | } |
| 912 | |
| 913 | /* APs need special treatment */ |
| 914 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 915 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
| 916 | |
| 917 | /* down all dependent devices, that is VLANs */ |
| 918 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
| 919 | u.vlan.list) |
| 920 | dev_close(vlan->dev); |
| 921 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); |
| 922 | } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
| 923 | /* remove all packets in parent bc_buf pointing to this dev */ |
| 924 | ps = &sdata->bss->ps; |
| 925 | |
| 926 | spin_lock_irqsave(&ps->bc_buf.lock, flags); |
| 927 | skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { |
| 928 | if (skb->dev == sdata->dev) { |
| 929 | __skb_unlink(skb, &ps->bc_buf); |
| 930 | local->total_ps_buffered--; |
| 931 | ieee80211_free_txskb(&local->hw, skb); |
| 932 | } |
| 933 | } |
| 934 | spin_unlock_irqrestore(&ps->bc_buf.lock, flags); |
| 935 | } |
| 936 | |
| 937 | if (going_down) |
| 938 | local->open_count--; |
| 939 | |
| 940 | switch (sdata->vif.type) { |
| 941 | case NL80211_IFTYPE_AP_VLAN: |
| 942 | txq_sdata = container_of(sdata->bss, |
| 943 | struct ieee80211_sub_if_data, u.ap); |
| 944 | |
| 945 | mutex_lock(&local->mtx); |
| 946 | list_del(&sdata->u.vlan.list); |
| 947 | mutex_unlock(&local->mtx); |
| 948 | RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); |
| 949 | /* see comment in the default case below */ |
| 950 | ieee80211_free_keys(sdata, true); |
| 951 | /* no need to tell driver */ |
| 952 | break; |
| 953 | case NL80211_IFTYPE_MONITOR: |
| 954 | if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { |
| 955 | local->cooked_mntrs--; |
| 956 | break; |
| 957 | } |
| 958 | |
| 959 | local->monitors--; |
| 960 | if (local->monitors == 0) { |
| 961 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
| 962 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
| 963 | } |
| 964 | |
| 965 | ieee80211_adjust_monitor_flags(sdata, -1); |
| 966 | break; |
| 967 | case NL80211_IFTYPE_NAN: |
| 968 | /* clean all the functions */ |
| 969 | spin_lock_bh(&sdata->u.nan.func_lock); |
| 970 | |
| 971 | idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { |
| 972 | idr_remove(&sdata->u.nan.function_inst_ids, i); |
| 973 | cfg80211_free_nan_func(func); |
| 974 | } |
| 975 | idr_destroy(&sdata->u.nan.function_inst_ids); |
| 976 | |
| 977 | spin_unlock_bh(&sdata->u.nan.func_lock); |
| 978 | break; |
| 979 | case NL80211_IFTYPE_P2P_DEVICE: |
| 980 | /* relies on synchronize_rcu() below */ |
| 981 | RCU_INIT_POINTER(local->p2p_sdata, NULL); |
| 982 | /* fall through */ |
| 983 | default: |
| 984 | cancel_work_sync(&sdata->work); |
| 985 | /* |
| 986 | * When we get here, the interface is marked down. |
| 987 | * Free the remaining keys, if there are any |
| 988 | * (which can happen in AP mode if userspace sets |
| 989 | * keys before the interface is operating, and maybe |
| 990 | * also in WDS mode) |
| 991 | * |
| 992 | * Force the key freeing to always synchronize_net() |
| 993 | * to wait for the RX path in case it is using this |
| 994 | * interface enqueuing frames at this very time on |
| 995 | * another CPU. |
| 996 | */ |
| 997 | ieee80211_free_keys(sdata, true); |
| 998 | skb_queue_purge(&sdata->skb_queue); |
| 999 | } |
| 1000 | |
| 1001 | sdata->bss = NULL; |
| 1002 | |
| 1003 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 1004 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { |
| 1005 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { |
| 1006 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 1007 | if (info->control.vif == &sdata->vif) { |
| 1008 | __skb_unlink(skb, &local->pending[i]); |
| 1009 | ieee80211_free_txskb(&local->hw, skb); |
| 1010 | } |
| 1011 | } |
| 1012 | } |
| 1013 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 1014 | |
| 1015 | if (txq_sdata->vif.txq) { |
| 1016 | struct txq_info *txqi = to_txq_info(txq_sdata->vif.txq); |
| 1017 | |
| 1018 | /* |
| 1019 | * FIXME FIXME |
| 1020 | * |
| 1021 | * We really shouldn't purge the *entire* txqi since that |
| 1022 | * contains frames for the other AP_VLANs (and possibly |
| 1023 | * the AP itself) as well, but there's no API in FQ now |
| 1024 | * to be able to filter. |
| 1025 | */ |
| 1026 | |
| 1027 | spin_lock_bh(&fq->lock); |
| 1028 | ieee80211_txq_purge(local, txqi); |
| 1029 | spin_unlock_bh(&fq->lock); |
| 1030 | } |
| 1031 | |
| 1032 | if (local->open_count == 0) |
| 1033 | ieee80211_clear_tx_pending(local); |
| 1034 | |
| 1035 | sdata->vif.bss_conf.beacon_int = 0; |
| 1036 | |
| 1037 | /* |
| 1038 | * If the interface goes down while suspended, presumably because |
| 1039 | * the device was unplugged and that happens before our resume, |
| 1040 | * then the driver is already unconfigured and the remainder of |
| 1041 | * this function isn't needed. |
| 1042 | * XXX: what about WoWLAN? If the device has software state, e.g. |
| 1043 | * memory allocated, it might expect teardown commands from |
| 1044 | * mac80211 here? |
| 1045 | */ |
| 1046 | if (local->suspended) { |
| 1047 | WARN_ON(local->wowlan); |
| 1048 | WARN_ON(rtnl_dereference(local->monitor_sdata)); |
| 1049 | return; |
| 1050 | } |
| 1051 | |
| 1052 | switch (sdata->vif.type) { |
| 1053 | case NL80211_IFTYPE_AP_VLAN: |
| 1054 | break; |
| 1055 | case NL80211_IFTYPE_MONITOR: |
| 1056 | if (local->monitors == 0) |
| 1057 | ieee80211_del_virtual_monitor(local); |
| 1058 | |
| 1059 | mutex_lock(&local->mtx); |
| 1060 | ieee80211_recalc_idle(local); |
| 1061 | mutex_unlock(&local->mtx); |
| 1062 | |
| 1063 | if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) |
| 1064 | break; |
| 1065 | |
| 1066 | /* fall through */ |
| 1067 | default: |
| 1068 | if (going_down) |
| 1069 | drv_remove_interface(local, sdata); |
| 1070 | } |
| 1071 | |
| 1072 | ieee80211_recalc_ps(local); |
| 1073 | |
| 1074 | if (cancel_scan) |
| 1075 | flush_delayed_work(&local->scan_work); |
| 1076 | |
| 1077 | if (local->open_count == 0) { |
| 1078 | ieee80211_stop_device(local); |
| 1079 | |
| 1080 | /* no reconfiguring after stop! */ |
| 1081 | return; |
| 1082 | } |
| 1083 | |
| 1084 | /* do after stop to avoid reconfiguring when we stop anyway */ |
| 1085 | ieee80211_configure_filter(local); |
| 1086 | ieee80211_hw_config(local, hw_reconf_flags); |
| 1087 | |
| 1088 | if (local->monitors == local->open_count) |
| 1089 | ieee80211_add_virtual_monitor(local); |
| 1090 | } |
| 1091 | |
| 1092 | static int ieee80211_stop(struct net_device *dev) |
| 1093 | { |
| 1094 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1095 | |
| 1096 | ieee80211_do_stop(sdata, true); |
| 1097 | |
| 1098 | return 0; |
| 1099 | } |
| 1100 | |
| 1101 | static void ieee80211_set_multicast_list(struct net_device *dev) |
| 1102 | { |
| 1103 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1104 | struct ieee80211_local *local = sdata->local; |
| 1105 | int allmulti, sdata_allmulti; |
| 1106 | |
| 1107 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
| 1108 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
| 1109 | |
| 1110 | if (allmulti != sdata_allmulti) { |
| 1111 | if (dev->flags & IFF_ALLMULTI) |
| 1112 | atomic_inc(&local->iff_allmultis); |
| 1113 | else |
| 1114 | atomic_dec(&local->iff_allmultis); |
| 1115 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
| 1116 | } |
| 1117 | |
| 1118 | spin_lock_bh(&local->filter_lock); |
| 1119 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
| 1120 | spin_unlock_bh(&local->filter_lock); |
| 1121 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
| 1122 | } |
| 1123 | |
| 1124 | /* |
| 1125 | * Called when the netdev is removed or, by the code below, before |
| 1126 | * the interface type changes. |
| 1127 | */ |
| 1128 | static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) |
| 1129 | { |
| 1130 | int i; |
| 1131 | |
| 1132 | /* free extra data */ |
| 1133 | ieee80211_free_keys(sdata, false); |
| 1134 | |
| 1135 | ieee80211_debugfs_remove_netdev(sdata); |
| 1136 | |
| 1137 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| 1138 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
| 1139 | sdata->fragment_next = 0; |
| 1140 | |
| 1141 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 1142 | ieee80211_mesh_teardown_sdata(sdata); |
| 1143 | } |
| 1144 | |
| 1145 | static void ieee80211_uninit(struct net_device *dev) |
| 1146 | { |
| 1147 | ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); |
| 1148 | } |
| 1149 | |
| 1150 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
| 1151 | struct sk_buff *skb, |
| 1152 | void *accel_priv, |
| 1153 | select_queue_fallback_t fallback) |
| 1154 | { |
| 1155 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); |
| 1156 | } |
| 1157 | |
| 1158 | static void |
| 1159 | ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
| 1160 | { |
| 1161 | int i; |
| 1162 | |
| 1163 | for_each_possible_cpu(i) { |
| 1164 | const struct pcpu_sw_netstats *tstats; |
| 1165 | u64 rx_packets, rx_bytes, tx_packets, tx_bytes; |
| 1166 | unsigned int start; |
| 1167 | |
| 1168 | tstats = per_cpu_ptr(dev->tstats, i); |
| 1169 | |
| 1170 | do { |
| 1171 | start = u64_stats_fetch_begin_irq(&tstats->syncp); |
| 1172 | rx_packets = tstats->rx_packets; |
| 1173 | tx_packets = tstats->tx_packets; |
| 1174 | rx_bytes = tstats->rx_bytes; |
| 1175 | tx_bytes = tstats->tx_bytes; |
| 1176 | } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); |
| 1177 | |
| 1178 | stats->rx_packets += rx_packets; |
| 1179 | stats->tx_packets += tx_packets; |
| 1180 | stats->rx_bytes += rx_bytes; |
| 1181 | stats->tx_bytes += tx_bytes; |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | static const struct net_device_ops ieee80211_dataif_ops = { |
| 1186 | .ndo_open = ieee80211_open, |
| 1187 | .ndo_stop = ieee80211_stop, |
| 1188 | .ndo_uninit = ieee80211_uninit, |
| 1189 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
| 1190 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
| 1191 | .ndo_set_mac_address = ieee80211_change_mac, |
| 1192 | .ndo_select_queue = ieee80211_netdev_select_queue, |
| 1193 | .ndo_get_stats64 = ieee80211_get_stats64, |
| 1194 | }; |
| 1195 | |
| 1196 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
| 1197 | struct sk_buff *skb, |
| 1198 | void *accel_priv, |
| 1199 | select_queue_fallback_t fallback) |
| 1200 | { |
| 1201 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1202 | struct ieee80211_local *local = sdata->local; |
| 1203 | struct ieee80211_hdr *hdr; |
| 1204 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; |
| 1205 | |
| 1206 | if (local->hw.queues < IEEE80211_NUM_ACS) |
| 1207 | return 0; |
| 1208 | |
| 1209 | if (skb->len < 4 || |
| 1210 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
| 1211 | return 0; /* doesn't matter, frame will be dropped */ |
| 1212 | |
| 1213 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
| 1214 | |
| 1215 | return ieee80211_select_queue_80211(sdata, skb, hdr); |
| 1216 | } |
| 1217 | |
| 1218 | static const struct net_device_ops ieee80211_monitorif_ops = { |
| 1219 | .ndo_open = ieee80211_open, |
| 1220 | .ndo_stop = ieee80211_stop, |
| 1221 | .ndo_uninit = ieee80211_uninit, |
| 1222 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
| 1223 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
| 1224 | .ndo_set_mac_address = ieee80211_change_mac, |
| 1225 | .ndo_select_queue = ieee80211_monitor_select_queue, |
| 1226 | .ndo_get_stats64 = ieee80211_get_stats64, |
| 1227 | }; |
| 1228 | |
| 1229 | static void ieee80211_if_free(struct net_device *dev) |
| 1230 | { |
| 1231 | free_percpu(dev->tstats); |
| 1232 | } |
| 1233 | |
| 1234 | static void ieee80211_if_setup(struct net_device *dev) |
| 1235 | { |
| 1236 | ether_setup(dev); |
| 1237 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
| 1238 | dev->netdev_ops = &ieee80211_dataif_ops; |
| 1239 | dev->needs_free_netdev = true; |
| 1240 | dev->priv_destructor = ieee80211_if_free; |
| 1241 | } |
| 1242 | |
| 1243 | static void ieee80211_if_setup_no_queue(struct net_device *dev) |
| 1244 | { |
| 1245 | ieee80211_if_setup(dev); |
| 1246 | dev->priv_flags |= IFF_NO_QUEUE; |
| 1247 | } |
| 1248 | |
| 1249 | static void ieee80211_iface_work(struct work_struct *work) |
| 1250 | { |
| 1251 | struct ieee80211_sub_if_data *sdata = |
| 1252 | container_of(work, struct ieee80211_sub_if_data, work); |
| 1253 | struct ieee80211_local *local = sdata->local; |
| 1254 | struct sk_buff *skb; |
| 1255 | struct sta_info *sta; |
| 1256 | |
| 1257 | if (!ieee80211_sdata_running(sdata)) |
| 1258 | return; |
| 1259 | |
| 1260 | if (test_bit(SCAN_SW_SCANNING, &local->scanning)) |
| 1261 | return; |
| 1262 | |
| 1263 | if (!ieee80211_can_run_worker(local)) |
| 1264 | return; |
| 1265 | |
| 1266 | /* first process frames */ |
| 1267 | while ((skb = skb_dequeue(&sdata->skb_queue))) { |
| 1268 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
| 1269 | |
| 1270 | if (ieee80211_is_action(mgmt->frame_control) && |
| 1271 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { |
| 1272 | int len = skb->len; |
| 1273 | |
| 1274 | mutex_lock(&local->sta_mtx); |
| 1275 | sta = sta_info_get_bss(sdata, mgmt->sa); |
| 1276 | if (sta) { |
| 1277 | switch (mgmt->u.action.u.addba_req.action_code) { |
| 1278 | case WLAN_ACTION_ADDBA_REQ: |
| 1279 | ieee80211_process_addba_request( |
| 1280 | local, sta, mgmt, len); |
| 1281 | break; |
| 1282 | case WLAN_ACTION_ADDBA_RESP: |
| 1283 | ieee80211_process_addba_resp(local, sta, |
| 1284 | mgmt, len); |
| 1285 | break; |
| 1286 | case WLAN_ACTION_DELBA: |
| 1287 | ieee80211_process_delba(sdata, sta, |
| 1288 | mgmt, len); |
| 1289 | break; |
| 1290 | default: |
| 1291 | WARN_ON(1); |
| 1292 | break; |
| 1293 | } |
| 1294 | } |
| 1295 | mutex_unlock(&local->sta_mtx); |
| 1296 | } else if (ieee80211_is_action(mgmt->frame_control) && |
| 1297 | mgmt->u.action.category == WLAN_CATEGORY_VHT) { |
| 1298 | switch (mgmt->u.action.u.vht_group_notif.action_code) { |
| 1299 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { |
| 1300 | struct ieee80211_rx_status *status; |
| 1301 | enum nl80211_band band; |
| 1302 | u8 opmode; |
| 1303 | |
| 1304 | status = IEEE80211_SKB_RXCB(skb); |
| 1305 | band = status->band; |
| 1306 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; |
| 1307 | |
| 1308 | mutex_lock(&local->sta_mtx); |
| 1309 | sta = sta_info_get_bss(sdata, mgmt->sa); |
| 1310 | |
| 1311 | if (sta) |
| 1312 | ieee80211_vht_handle_opmode(sdata, sta, |
| 1313 | opmode, |
| 1314 | band); |
| 1315 | |
| 1316 | mutex_unlock(&local->sta_mtx); |
| 1317 | break; |
| 1318 | } |
| 1319 | case WLAN_VHT_ACTION_GROUPID_MGMT: |
| 1320 | ieee80211_process_mu_groups(sdata, mgmt); |
| 1321 | break; |
| 1322 | default: |
| 1323 | WARN_ON(1); |
| 1324 | break; |
| 1325 | } |
| 1326 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
| 1327 | struct ieee80211_hdr *hdr = (void *)mgmt; |
| 1328 | /* |
| 1329 | * So the frame isn't mgmt, but frame_control |
| 1330 | * is at the right place anyway, of course, so |
| 1331 | * the if statement is correct. |
| 1332 | * |
| 1333 | * Warn if we have other data frame types here, |
| 1334 | * they must not get here. |
| 1335 | */ |
| 1336 | WARN_ON(hdr->frame_control & |
| 1337 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); |
| 1338 | WARN_ON(!(hdr->seq_ctrl & |
| 1339 | cpu_to_le16(IEEE80211_SCTL_FRAG))); |
| 1340 | /* |
| 1341 | * This was a fragment of a frame, received while |
| 1342 | * a block-ack session was active. That cannot be |
| 1343 | * right, so terminate the session. |
| 1344 | */ |
| 1345 | mutex_lock(&local->sta_mtx); |
| 1346 | sta = sta_info_get_bss(sdata, mgmt->sa); |
| 1347 | if (sta) { |
| 1348 | u16 tid = *ieee80211_get_qos_ctl(hdr) & |
| 1349 | IEEE80211_QOS_CTL_TID_MASK; |
| 1350 | |
| 1351 | __ieee80211_stop_rx_ba_session( |
| 1352 | sta, tid, WLAN_BACK_RECIPIENT, |
| 1353 | WLAN_REASON_QSTA_REQUIRE_SETUP, |
| 1354 | true); |
| 1355 | } |
| 1356 | mutex_unlock(&local->sta_mtx); |
| 1357 | } else switch (sdata->vif.type) { |
| 1358 | case NL80211_IFTYPE_STATION: |
| 1359 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
| 1360 | break; |
| 1361 | case NL80211_IFTYPE_ADHOC: |
| 1362 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); |
| 1363 | break; |
| 1364 | case NL80211_IFTYPE_MESH_POINT: |
| 1365 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 1366 | break; |
| 1367 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); |
| 1368 | break; |
| 1369 | default: |
| 1370 | WARN(1, "frame for unexpected interface type"); |
| 1371 | break; |
| 1372 | } |
| 1373 | |
| 1374 | kfree_skb(skb); |
| 1375 | } |
| 1376 | |
| 1377 | /* then other type-dependent work */ |
| 1378 | switch (sdata->vif.type) { |
| 1379 | case NL80211_IFTYPE_STATION: |
| 1380 | ieee80211_sta_work(sdata); |
| 1381 | break; |
| 1382 | case NL80211_IFTYPE_ADHOC: |
| 1383 | ieee80211_ibss_work(sdata); |
| 1384 | break; |
| 1385 | case NL80211_IFTYPE_MESH_POINT: |
| 1386 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 1387 | break; |
| 1388 | ieee80211_mesh_work(sdata); |
| 1389 | break; |
| 1390 | case NL80211_IFTYPE_OCB: |
| 1391 | ieee80211_ocb_work(sdata); |
| 1392 | break; |
| 1393 | default: |
| 1394 | break; |
| 1395 | } |
| 1396 | } |
| 1397 | |
| 1398 | static void ieee80211_recalc_smps_work(struct work_struct *work) |
| 1399 | { |
| 1400 | struct ieee80211_sub_if_data *sdata = |
| 1401 | container_of(work, struct ieee80211_sub_if_data, recalc_smps); |
| 1402 | |
| 1403 | ieee80211_recalc_smps(sdata); |
| 1404 | } |
| 1405 | |
| 1406 | /* |
| 1407 | * Helper function to initialise an interface to a specific type. |
| 1408 | */ |
| 1409 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, |
| 1410 | enum nl80211_iftype type) |
| 1411 | { |
| 1412 | static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, |
| 1413 | 0xff, 0xff, 0xff}; |
| 1414 | |
| 1415 | /* clear type-dependent union */ |
| 1416 | memset(&sdata->u, 0, sizeof(sdata->u)); |
| 1417 | |
| 1418 | /* and set some type-dependent values */ |
| 1419 | sdata->vif.type = type; |
| 1420 | sdata->vif.p2p = false; |
| 1421 | sdata->wdev.iftype = type; |
| 1422 | |
| 1423 | sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
| 1424 | sdata->control_port_no_encrypt = false; |
| 1425 | sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
| 1426 | sdata->vif.bss_conf.idle = true; |
| 1427 | |
| 1428 | sdata->noack_map = 0; |
| 1429 | |
| 1430 | /* only monitor/p2p-device differ */ |
| 1431 | if (sdata->dev) { |
| 1432 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
| 1433 | sdata->dev->type = ARPHRD_ETHER; |
| 1434 | } |
| 1435 | |
| 1436 | skb_queue_head_init(&sdata->skb_queue); |
| 1437 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
| 1438 | INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); |
| 1439 | INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); |
| 1440 | INIT_LIST_HEAD(&sdata->assigned_chanctx_list); |
| 1441 | INIT_LIST_HEAD(&sdata->reserved_chanctx_list); |
| 1442 | |
| 1443 | switch (type) { |
| 1444 | case NL80211_IFTYPE_P2P_GO: |
| 1445 | type = NL80211_IFTYPE_AP; |
| 1446 | sdata->vif.type = type; |
| 1447 | sdata->vif.p2p = true; |
| 1448 | /* fall through */ |
| 1449 | case NL80211_IFTYPE_AP: |
| 1450 | skb_queue_head_init(&sdata->u.ap.ps.bc_buf); |
| 1451 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
| 1452 | INIT_WORK(&sdata->u.ap.request_smps_work, |
| 1453 | ieee80211_request_smps_ap_work); |
| 1454 | sdata->vif.bss_conf.bssid = sdata->vif.addr; |
| 1455 | sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; |
| 1456 | break; |
| 1457 | case NL80211_IFTYPE_P2P_CLIENT: |
| 1458 | type = NL80211_IFTYPE_STATION; |
| 1459 | sdata->vif.type = type; |
| 1460 | sdata->vif.p2p = true; |
| 1461 | /* fall through */ |
| 1462 | case NL80211_IFTYPE_STATION: |
| 1463 | sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; |
| 1464 | ieee80211_sta_setup_sdata(sdata); |
| 1465 | break; |
| 1466 | case NL80211_IFTYPE_OCB: |
| 1467 | sdata->vif.bss_conf.bssid = bssid_wildcard; |
| 1468 | ieee80211_ocb_setup_sdata(sdata); |
| 1469 | break; |
| 1470 | case NL80211_IFTYPE_ADHOC: |
| 1471 | sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; |
| 1472 | ieee80211_ibss_setup_sdata(sdata); |
| 1473 | break; |
| 1474 | case NL80211_IFTYPE_MESH_POINT: |
| 1475 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 1476 | ieee80211_mesh_init_sdata(sdata); |
| 1477 | break; |
| 1478 | case NL80211_IFTYPE_MONITOR: |
| 1479 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
| 1480 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
| 1481 | sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | |
| 1482 | MONITOR_FLAG_OTHER_BSS; |
| 1483 | break; |
| 1484 | case NL80211_IFTYPE_WDS: |
| 1485 | sdata->vif.bss_conf.bssid = NULL; |
| 1486 | break; |
| 1487 | case NL80211_IFTYPE_NAN: |
| 1488 | idr_init(&sdata->u.nan.function_inst_ids); |
| 1489 | spin_lock_init(&sdata->u.nan.func_lock); |
| 1490 | sdata->vif.bss_conf.bssid = sdata->vif.addr; |
| 1491 | break; |
| 1492 | case NL80211_IFTYPE_AP_VLAN: |
| 1493 | case NL80211_IFTYPE_P2P_DEVICE: |
| 1494 | sdata->vif.bss_conf.bssid = sdata->vif.addr; |
| 1495 | break; |
| 1496 | case NL80211_IFTYPE_UNSPECIFIED: |
| 1497 | case NUM_NL80211_IFTYPES: |
| 1498 | WARN_ON(1); |
| 1499 | break; |
| 1500 | } |
| 1501 | |
| 1502 | ieee80211_debugfs_add_netdev(sdata); |
| 1503 | } |
| 1504 | |
| 1505 | static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
| 1506 | enum nl80211_iftype type) |
| 1507 | { |
| 1508 | struct ieee80211_local *local = sdata->local; |
| 1509 | int ret, err; |
| 1510 | enum nl80211_iftype internal_type = type; |
| 1511 | bool p2p = false; |
| 1512 | |
| 1513 | ASSERT_RTNL(); |
| 1514 | |
| 1515 | if (!local->ops->change_interface) |
| 1516 | return -EBUSY; |
| 1517 | |
| 1518 | switch (sdata->vif.type) { |
| 1519 | case NL80211_IFTYPE_AP: |
| 1520 | case NL80211_IFTYPE_STATION: |
| 1521 | case NL80211_IFTYPE_ADHOC: |
| 1522 | case NL80211_IFTYPE_OCB: |
| 1523 | /* |
| 1524 | * Could maybe also all others here? |
| 1525 | * Just not sure how that interacts |
| 1526 | * with the RX/config path e.g. for |
| 1527 | * mesh. |
| 1528 | */ |
| 1529 | break; |
| 1530 | default: |
| 1531 | return -EBUSY; |
| 1532 | } |
| 1533 | |
| 1534 | switch (type) { |
| 1535 | case NL80211_IFTYPE_AP: |
| 1536 | case NL80211_IFTYPE_STATION: |
| 1537 | case NL80211_IFTYPE_ADHOC: |
| 1538 | case NL80211_IFTYPE_OCB: |
| 1539 | /* |
| 1540 | * Could probably support everything |
| 1541 | * but WDS here (WDS do_open can fail |
| 1542 | * under memory pressure, which this |
| 1543 | * code isn't prepared to handle). |
| 1544 | */ |
| 1545 | break; |
| 1546 | case NL80211_IFTYPE_P2P_CLIENT: |
| 1547 | p2p = true; |
| 1548 | internal_type = NL80211_IFTYPE_STATION; |
| 1549 | break; |
| 1550 | case NL80211_IFTYPE_P2P_GO: |
| 1551 | p2p = true; |
| 1552 | internal_type = NL80211_IFTYPE_AP; |
| 1553 | break; |
| 1554 | default: |
| 1555 | return -EBUSY; |
| 1556 | } |
| 1557 | |
| 1558 | ret = ieee80211_check_concurrent_iface(sdata, internal_type); |
| 1559 | if (ret) |
| 1560 | return ret; |
| 1561 | |
| 1562 | ieee80211_do_stop(sdata, false); |
| 1563 | |
| 1564 | ieee80211_teardown_sdata(sdata); |
| 1565 | |
| 1566 | ret = drv_change_interface(local, sdata, internal_type, p2p); |
| 1567 | if (ret) |
| 1568 | type = ieee80211_vif_type_p2p(&sdata->vif); |
| 1569 | |
| 1570 | /* |
| 1571 | * Ignore return value here, there's not much we can do since |
| 1572 | * the driver changed the interface type internally already. |
| 1573 | * The warnings will hopefully make driver authors fix it :-) |
| 1574 | */ |
| 1575 | ieee80211_check_queues(sdata, type); |
| 1576 | |
| 1577 | ieee80211_setup_sdata(sdata, type); |
| 1578 | |
| 1579 | err = ieee80211_do_open(&sdata->wdev, false); |
| 1580 | WARN(err, "type change: do_open returned %d", err); |
| 1581 | |
| 1582 | return ret; |
| 1583 | } |
| 1584 | |
| 1585 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
| 1586 | enum nl80211_iftype type) |
| 1587 | { |
| 1588 | int ret; |
| 1589 | |
| 1590 | ASSERT_RTNL(); |
| 1591 | |
| 1592 | if (type == ieee80211_vif_type_p2p(&sdata->vif)) |
| 1593 | return 0; |
| 1594 | |
| 1595 | if (ieee80211_sdata_running(sdata)) { |
| 1596 | ret = ieee80211_runtime_change_iftype(sdata, type); |
| 1597 | if (ret) |
| 1598 | return ret; |
| 1599 | } else { |
| 1600 | /* Purge and reset type-dependent state. */ |
| 1601 | ieee80211_teardown_sdata(sdata); |
| 1602 | ieee80211_setup_sdata(sdata, type); |
| 1603 | } |
| 1604 | |
| 1605 | /* reset some values that shouldn't be kept across type changes */ |
| 1606 | if (type == NL80211_IFTYPE_STATION) |
| 1607 | sdata->u.mgd.use_4addr = false; |
| 1608 | |
| 1609 | return 0; |
| 1610 | } |
| 1611 | |
| 1612 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
| 1613 | u8 *perm_addr, enum nl80211_iftype type) |
| 1614 | { |
| 1615 | struct ieee80211_sub_if_data *sdata; |
| 1616 | u64 mask, start, addr, val, inc; |
| 1617 | u8 *m; |
| 1618 | u8 tmp_addr[ETH_ALEN]; |
| 1619 | int i; |
| 1620 | |
| 1621 | /* default ... something at least */ |
| 1622 | memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
| 1623 | |
| 1624 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && |
| 1625 | local->hw.wiphy->n_addresses <= 1) |
| 1626 | return; |
| 1627 | |
| 1628 | mutex_lock(&local->iflist_mtx); |
| 1629 | |
| 1630 | switch (type) { |
| 1631 | case NL80211_IFTYPE_MONITOR: |
| 1632 | /* doesn't matter */ |
| 1633 | break; |
| 1634 | case NL80211_IFTYPE_WDS: |
| 1635 | case NL80211_IFTYPE_AP_VLAN: |
| 1636 | /* match up with an AP interface */ |
| 1637 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1638 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
| 1639 | continue; |
| 1640 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
| 1641 | break; |
| 1642 | } |
| 1643 | /* keep default if no AP interface present */ |
| 1644 | break; |
| 1645 | case NL80211_IFTYPE_P2P_CLIENT: |
| 1646 | case NL80211_IFTYPE_P2P_GO: |
| 1647 | if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { |
| 1648 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1649 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) |
| 1650 | continue; |
| 1651 | if (!ieee80211_sdata_running(sdata)) |
| 1652 | continue; |
| 1653 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
| 1654 | goto out_unlock; |
| 1655 | } |
| 1656 | } |
| 1657 | /* otherwise fall through */ |
| 1658 | default: |
| 1659 | /* assign a new address if possible -- try n_addresses first */ |
| 1660 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { |
| 1661 | bool used = false; |
| 1662 | |
| 1663 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1664 | if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, |
| 1665 | sdata->vif.addr)) { |
| 1666 | used = true; |
| 1667 | break; |
| 1668 | } |
| 1669 | } |
| 1670 | |
| 1671 | if (!used) { |
| 1672 | memcpy(perm_addr, |
| 1673 | local->hw.wiphy->addresses[i].addr, |
| 1674 | ETH_ALEN); |
| 1675 | break; |
| 1676 | } |
| 1677 | } |
| 1678 | |
| 1679 | /* try mask if available */ |
| 1680 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) |
| 1681 | break; |
| 1682 | |
| 1683 | m = local->hw.wiphy->addr_mask; |
| 1684 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 1685 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 1686 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 1687 | |
| 1688 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { |
| 1689 | /* not a contiguous mask ... not handled now! */ |
| 1690 | pr_info("not contiguous\n"); |
| 1691 | break; |
| 1692 | } |
| 1693 | |
| 1694 | /* |
| 1695 | * Pick address of existing interface in case user changed |
| 1696 | * MAC address manually, default to perm_addr. |
| 1697 | */ |
| 1698 | m = local->hw.wiphy->perm_addr; |
| 1699 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1700 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) |
| 1701 | continue; |
| 1702 | m = sdata->vif.addr; |
| 1703 | break; |
| 1704 | } |
| 1705 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 1706 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 1707 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 1708 | |
| 1709 | inc = 1ULL<<__ffs64(mask); |
| 1710 | val = (start & mask); |
| 1711 | addr = (start & ~mask) | (val & mask); |
| 1712 | do { |
| 1713 | bool used = false; |
| 1714 | |
| 1715 | tmp_addr[5] = addr >> 0*8; |
| 1716 | tmp_addr[4] = addr >> 1*8; |
| 1717 | tmp_addr[3] = addr >> 2*8; |
| 1718 | tmp_addr[2] = addr >> 3*8; |
| 1719 | tmp_addr[1] = addr >> 4*8; |
| 1720 | tmp_addr[0] = addr >> 5*8; |
| 1721 | |
| 1722 | val += inc; |
| 1723 | |
| 1724 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1725 | if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { |
| 1726 | used = true; |
| 1727 | break; |
| 1728 | } |
| 1729 | } |
| 1730 | |
| 1731 | if (!used) { |
| 1732 | memcpy(perm_addr, tmp_addr, ETH_ALEN); |
| 1733 | break; |
| 1734 | } |
| 1735 | addr = (start & ~mask) | (val & mask); |
| 1736 | } while (addr != start); |
| 1737 | |
| 1738 | break; |
| 1739 | } |
| 1740 | |
| 1741 | out_unlock: |
| 1742 | mutex_unlock(&local->iflist_mtx); |
| 1743 | } |
| 1744 | |
| 1745 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
| 1746 | unsigned char name_assign_type, |
| 1747 | struct wireless_dev **new_wdev, enum nl80211_iftype type, |
| 1748 | struct vif_params *params) |
| 1749 | { |
| 1750 | struct net_device *ndev = NULL; |
| 1751 | struct ieee80211_sub_if_data *sdata = NULL; |
| 1752 | struct txq_info *txqi; |
| 1753 | void (*if_setup)(struct net_device *dev); |
| 1754 | int ret, i; |
| 1755 | int txqs = 1; |
| 1756 | |
| 1757 | ASSERT_RTNL(); |
| 1758 | |
| 1759 | if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { |
| 1760 | struct wireless_dev *wdev; |
| 1761 | |
| 1762 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, |
| 1763 | GFP_KERNEL); |
| 1764 | if (!sdata) |
| 1765 | return -ENOMEM; |
| 1766 | wdev = &sdata->wdev; |
| 1767 | |
| 1768 | sdata->dev = NULL; |
| 1769 | strlcpy(sdata->name, name, IFNAMSIZ); |
| 1770 | ieee80211_assign_perm_addr(local, wdev->address, type); |
| 1771 | memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); |
| 1772 | } else { |
| 1773 | int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, |
| 1774 | sizeof(void *)); |
| 1775 | int txq_size = 0; |
| 1776 | |
| 1777 | if (local->ops->wake_tx_queue) |
| 1778 | txq_size += sizeof(struct txq_info) + |
| 1779 | local->hw.txq_data_size; |
| 1780 | |
| 1781 | if (local->ops->wake_tx_queue) |
| 1782 | if_setup = ieee80211_if_setup_no_queue; |
| 1783 | else |
| 1784 | if_setup = ieee80211_if_setup; |
| 1785 | |
| 1786 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
| 1787 | txqs = IEEE80211_NUM_ACS; |
| 1788 | |
| 1789 | ndev = alloc_netdev_mqs(size + txq_size, |
| 1790 | name, name_assign_type, |
| 1791 | if_setup, txqs, 1); |
| 1792 | if (!ndev) |
| 1793 | return -ENOMEM; |
| 1794 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
| 1795 | |
| 1796 | ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
| 1797 | if (!ndev->tstats) { |
| 1798 | free_netdev(ndev); |
| 1799 | return -ENOMEM; |
| 1800 | } |
| 1801 | |
| 1802 | ndev->needed_headroom = local->tx_headroom + |
| 1803 | 4*6 /* four MAC addresses */ |
| 1804 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ |
| 1805 | + 6 /* mesh */ |
| 1806 | + 8 /* rfc1042/bridge tunnel */ |
| 1807 | - ETH_HLEN /* ethernet hard_header_len */ |
| 1808 | + IEEE80211_ENCRYPT_HEADROOM; |
| 1809 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; |
| 1810 | |
| 1811 | ret = dev_alloc_name(ndev, ndev->name); |
| 1812 | if (ret < 0) { |
| 1813 | ieee80211_if_free(ndev); |
| 1814 | free_netdev(ndev); |
| 1815 | return ret; |
| 1816 | } |
| 1817 | |
| 1818 | ieee80211_assign_perm_addr(local, ndev->perm_addr, type); |
| 1819 | if (params && is_valid_ether_addr(params->macaddr)) |
| 1820 | memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); |
| 1821 | else |
| 1822 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); |
| 1823 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
| 1824 | |
| 1825 | /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ |
| 1826 | sdata = netdev_priv(ndev); |
| 1827 | ndev->ieee80211_ptr = &sdata->wdev; |
| 1828 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
| 1829 | memcpy(sdata->name, ndev->name, IFNAMSIZ); |
| 1830 | |
| 1831 | if (txq_size) { |
| 1832 | txqi = netdev_priv(ndev) + size; |
| 1833 | ieee80211_txq_init(sdata, NULL, txqi, 0); |
| 1834 | } |
| 1835 | |
| 1836 | sdata->dev = ndev; |
| 1837 | } |
| 1838 | |
| 1839 | /* initialise type-independent data */ |
| 1840 | sdata->wdev.wiphy = local->hw.wiphy; |
| 1841 | sdata->local = local; |
| 1842 | |
| 1843 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| 1844 | skb_queue_head_init(&sdata->fragments[i].skb_list); |
| 1845 | |
| 1846 | INIT_LIST_HEAD(&sdata->key_list); |
| 1847 | |
| 1848 | INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, |
| 1849 | ieee80211_dfs_cac_timer_work); |
| 1850 | INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, |
| 1851 | ieee80211_delayed_tailroom_dec); |
| 1852 | |
| 1853 | for (i = 0; i < NUM_NL80211_BANDS; i++) { |
| 1854 | struct ieee80211_supported_band *sband; |
| 1855 | sband = local->hw.wiphy->bands[i]; |
| 1856 | sdata->rc_rateidx_mask[i] = |
| 1857 | sband ? (1 << sband->n_bitrates) - 1 : 0; |
| 1858 | if (sband) { |
| 1859 | __le16 cap; |
| 1860 | u16 *vht_rate_mask; |
| 1861 | |
| 1862 | memcpy(sdata->rc_rateidx_mcs_mask[i], |
| 1863 | sband->ht_cap.mcs.rx_mask, |
| 1864 | sizeof(sdata->rc_rateidx_mcs_mask[i])); |
| 1865 | |
| 1866 | cap = sband->vht_cap.vht_mcs.rx_mcs_map; |
| 1867 | vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; |
| 1868 | ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); |
| 1869 | } else { |
| 1870 | memset(sdata->rc_rateidx_mcs_mask[i], 0, |
| 1871 | sizeof(sdata->rc_rateidx_mcs_mask[i])); |
| 1872 | memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, |
| 1873 | sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); |
| 1874 | } |
| 1875 | } |
| 1876 | |
| 1877 | ieee80211_set_default_queues(sdata); |
| 1878 | |
| 1879 | sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
| 1880 | sdata->user_power_level = local->user_power_level; |
| 1881 | |
| 1882 | sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
| 1883 | |
| 1884 | /* setup type-dependent data */ |
| 1885 | ieee80211_setup_sdata(sdata, type); |
| 1886 | |
| 1887 | if (ndev) { |
| 1888 | if (params) { |
| 1889 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; |
| 1890 | if (type == NL80211_IFTYPE_STATION) |
| 1891 | sdata->u.mgd.use_4addr = params->use_4addr; |
| 1892 | } |
| 1893 | |
| 1894 | ndev->features |= local->hw.netdev_features; |
| 1895 | |
| 1896 | netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); |
| 1897 | |
| 1898 | /* MTU range: 256 - 2304 */ |
| 1899 | ndev->min_mtu = 256; |
| 1900 | ndev->max_mtu = IEEE80211_MAX_DATA_LEN; |
| 1901 | |
| 1902 | ret = register_netdevice(ndev); |
| 1903 | if (ret) { |
| 1904 | free_netdev(ndev); |
| 1905 | return ret; |
| 1906 | } |
| 1907 | } |
| 1908 | |
| 1909 | mutex_lock(&local->iflist_mtx); |
| 1910 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
| 1911 | mutex_unlock(&local->iflist_mtx); |
| 1912 | |
| 1913 | if (new_wdev) |
| 1914 | *new_wdev = &sdata->wdev; |
| 1915 | |
| 1916 | return 0; |
| 1917 | } |
| 1918 | |
| 1919 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
| 1920 | { |
| 1921 | ASSERT_RTNL(); |
| 1922 | |
| 1923 | mutex_lock(&sdata->local->iflist_mtx); |
| 1924 | list_del_rcu(&sdata->list); |
| 1925 | mutex_unlock(&sdata->local->iflist_mtx); |
| 1926 | |
| 1927 | if (sdata->vif.txq) |
| 1928 | ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); |
| 1929 | |
| 1930 | synchronize_rcu(); |
| 1931 | |
| 1932 | if (sdata->dev) { |
| 1933 | unregister_netdevice(sdata->dev); |
| 1934 | } else { |
| 1935 | cfg80211_unregister_wdev(&sdata->wdev); |
| 1936 | ieee80211_teardown_sdata(sdata); |
| 1937 | kfree(sdata); |
| 1938 | } |
| 1939 | } |
| 1940 | |
| 1941 | void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) |
| 1942 | { |
| 1943 | if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) |
| 1944 | return; |
| 1945 | ieee80211_do_stop(sdata, true); |
| 1946 | } |
| 1947 | |
| 1948 | void ieee80211_remove_interfaces(struct ieee80211_local *local) |
| 1949 | { |
| 1950 | struct ieee80211_sub_if_data *sdata, *tmp; |
| 1951 | LIST_HEAD(unreg_list); |
| 1952 | LIST_HEAD(wdev_list); |
| 1953 | |
| 1954 | ASSERT_RTNL(); |
| 1955 | |
| 1956 | /* Before destroying the interfaces, make sure they're all stopped so |
| 1957 | * that the hardware is stopped. Otherwise, the driver might still be |
| 1958 | * iterating the interfaces during the shutdown, e.g. from a worker |
| 1959 | * or from RX processing or similar, and if it does so (using atomic |
| 1960 | * iteration) while we're manipulating the list, the iteration will |
| 1961 | * crash. |
| 1962 | * |
| 1963 | * After this, the hardware should be stopped and the driver should |
| 1964 | * have stopped all of its activities, so that we can do RCU-unaware |
| 1965 | * manipulations of the interface list below. |
| 1966 | */ |
| 1967 | cfg80211_shutdown_all_interfaces(local->hw.wiphy); |
| 1968 | |
| 1969 | WARN(local->open_count, "%s: open count remains %d\n", |
| 1970 | wiphy_name(local->hw.wiphy), local->open_count); |
| 1971 | |
| 1972 | mutex_lock(&local->iflist_mtx); |
| 1973 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
| 1974 | list_del(&sdata->list); |
| 1975 | |
| 1976 | if (sdata->dev) |
| 1977 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
| 1978 | else |
| 1979 | list_add(&sdata->list, &wdev_list); |
| 1980 | } |
| 1981 | mutex_unlock(&local->iflist_mtx); |
| 1982 | unregister_netdevice_many(&unreg_list); |
| 1983 | |
| 1984 | list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { |
| 1985 | list_del(&sdata->list); |
| 1986 | cfg80211_unregister_wdev(&sdata->wdev); |
| 1987 | kfree(sdata); |
| 1988 | } |
| 1989 | } |
| 1990 | |
| 1991 | static int netdev_notify(struct notifier_block *nb, |
| 1992 | unsigned long state, void *ptr) |
| 1993 | { |
| 1994 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
| 1995 | struct ieee80211_sub_if_data *sdata; |
| 1996 | |
| 1997 | if (state != NETDEV_CHANGENAME) |
| 1998 | return NOTIFY_DONE; |
| 1999 | |
| 2000 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) |
| 2001 | return NOTIFY_DONE; |
| 2002 | |
| 2003 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) |
| 2004 | return NOTIFY_DONE; |
| 2005 | |
| 2006 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 2007 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
| 2008 | ieee80211_debugfs_rename_netdev(sdata); |
| 2009 | |
| 2010 | return NOTIFY_OK; |
| 2011 | } |
| 2012 | |
| 2013 | static struct notifier_block mac80211_netdev_notifier = { |
| 2014 | .notifier_call = netdev_notify, |
| 2015 | }; |
| 2016 | |
| 2017 | int ieee80211_iface_init(void) |
| 2018 | { |
| 2019 | return register_netdevice_notifier(&mac80211_netdev_notifier); |
| 2020 | } |
| 2021 | |
| 2022 | void ieee80211_iface_exit(void) |
| 2023 | { |
| 2024 | unregister_netdevice_notifier(&mac80211_netdev_notifier); |
| 2025 | } |
| 2026 | |
| 2027 | void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) |
| 2028 | { |
| 2029 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
| 2030 | atomic_inc(&sdata->u.ap.num_mcast_sta); |
| 2031 | else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 2032 | atomic_inc(&sdata->u.vlan.num_mcast_sta); |
| 2033 | } |
| 2034 | |
| 2035 | void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) |
| 2036 | { |
| 2037 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
| 2038 | atomic_dec(&sdata->u.ap.num_mcast_sta); |
| 2039 | else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 2040 | atomic_dec(&sdata->u.vlan.num_mcast_sta); |
| 2041 | } |