| 1 | /* |
| 2 | * Interface handling (except master interface) |
| 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 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 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 | bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) |
| 46 | { |
| 47 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 48 | int power; |
| 49 | |
| 50 | rcu_read_lock(); |
| 51 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 52 | if (!chanctx_conf) { |
| 53 | rcu_read_unlock(); |
| 54 | return false; |
| 55 | } |
| 56 | |
| 57 | power = chanctx_conf->def.chan->max_power; |
| 58 | rcu_read_unlock(); |
| 59 | |
| 60 | if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) |
| 61 | power = min(power, sdata->user_power_level); |
| 62 | |
| 63 | if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) |
| 64 | power = min(power, sdata->ap_power_level); |
| 65 | |
| 66 | if (power != sdata->vif.bss_conf.txpower) { |
| 67 | sdata->vif.bss_conf.txpower = power; |
| 68 | ieee80211_hw_config(sdata->local, 0); |
| 69 | return true; |
| 70 | } |
| 71 | |
| 72 | return false; |
| 73 | } |
| 74 | |
| 75 | void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) |
| 76 | { |
| 77 | if (__ieee80211_recalc_txpower(sdata)) |
| 78 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); |
| 79 | } |
| 80 | |
| 81 | static u32 ieee80211_idle_off(struct ieee80211_local *local, |
| 82 | const char *reason) |
| 83 | { |
| 84 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) |
| 85 | return 0; |
| 86 | |
| 87 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; |
| 88 | return IEEE80211_CONF_CHANGE_IDLE; |
| 89 | } |
| 90 | |
| 91 | static u32 ieee80211_idle_on(struct ieee80211_local *local) |
| 92 | { |
| 93 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) |
| 94 | return 0; |
| 95 | |
| 96 | drv_flush(local, false); |
| 97 | |
| 98 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
| 99 | return IEEE80211_CONF_CHANGE_IDLE; |
| 100 | } |
| 101 | |
| 102 | static u32 __ieee80211_recalc_idle(struct ieee80211_local *local) |
| 103 | { |
| 104 | struct ieee80211_sub_if_data *sdata; |
| 105 | int count = 0; |
| 106 | bool working = false, scanning = false; |
| 107 | unsigned int led_trig_start = 0, led_trig_stop = 0; |
| 108 | struct ieee80211_roc_work *roc; |
| 109 | |
| 110 | #ifdef CONFIG_PROVE_LOCKING |
| 111 | WARN_ON(debug_locks && !lockdep_rtnl_is_held() && |
| 112 | !lockdep_is_held(&local->iflist_mtx)); |
| 113 | #endif |
| 114 | lockdep_assert_held(&local->mtx); |
| 115 | |
| 116 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 117 | if (!ieee80211_sdata_running(sdata)) { |
| 118 | sdata->vif.bss_conf.idle = true; |
| 119 | continue; |
| 120 | } |
| 121 | |
| 122 | sdata->old_idle = sdata->vif.bss_conf.idle; |
| 123 | |
| 124 | /* do not count disabled managed interfaces */ |
| 125 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
| 126 | !sdata->u.mgd.associated && |
| 127 | !sdata->u.mgd.auth_data && |
| 128 | !sdata->u.mgd.assoc_data) { |
| 129 | sdata->vif.bss_conf.idle = true; |
| 130 | continue; |
| 131 | } |
| 132 | /* do not count unused IBSS interfaces */ |
| 133 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| 134 | !sdata->u.ibss.ssid_len) { |
| 135 | sdata->vif.bss_conf.idle = true; |
| 136 | continue; |
| 137 | } |
| 138 | |
| 139 | if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) |
| 140 | continue; |
| 141 | |
| 142 | /* count everything else */ |
| 143 | sdata->vif.bss_conf.idle = false; |
| 144 | count++; |
| 145 | } |
| 146 | |
| 147 | if (!local->ops->remain_on_channel) { |
| 148 | list_for_each_entry(roc, &local->roc_list, list) { |
| 149 | working = true; |
| 150 | roc->sdata->vif.bss_conf.idle = false; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | sdata = rcu_dereference_protected(local->scan_sdata, |
| 155 | lockdep_is_held(&local->mtx)); |
| 156 | if (sdata && !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) { |
| 157 | scanning = true; |
| 158 | sdata->vif.bss_conf.idle = false; |
| 159 | } |
| 160 | |
| 161 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 162 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
| 163 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| 164 | sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) |
| 165 | continue; |
| 166 | if (sdata->old_idle == sdata->vif.bss_conf.idle) |
| 167 | continue; |
| 168 | if (!ieee80211_sdata_running(sdata)) |
| 169 | continue; |
| 170 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); |
| 171 | } |
| 172 | |
| 173 | if (working || scanning) |
| 174 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; |
| 175 | else |
| 176 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; |
| 177 | |
| 178 | if (count) |
| 179 | led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; |
| 180 | else |
| 181 | led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; |
| 182 | |
| 183 | ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); |
| 184 | |
| 185 | if (working) |
| 186 | return ieee80211_idle_off(local, "working"); |
| 187 | if (scanning) |
| 188 | return ieee80211_idle_off(local, "scanning"); |
| 189 | if (!count) |
| 190 | return ieee80211_idle_on(local); |
| 191 | else |
| 192 | return ieee80211_idle_off(local, "in use"); |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | void ieee80211_recalc_idle(struct ieee80211_local *local) |
| 198 | { |
| 199 | u32 chg; |
| 200 | |
| 201 | mutex_lock(&local->iflist_mtx); |
| 202 | chg = __ieee80211_recalc_idle(local); |
| 203 | mutex_unlock(&local->iflist_mtx); |
| 204 | if (chg) |
| 205 | ieee80211_hw_config(local, chg); |
| 206 | } |
| 207 | |
| 208 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
| 209 | { |
| 210 | int meshhdrlen; |
| 211 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 212 | |
| 213 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; |
| 214 | |
| 215 | /* FIX: what would be proper limits for MTU? |
| 216 | * This interface uses 802.3 frames. */ |
| 217 | if (new_mtu < 256 || |
| 218 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { |
| 219 | return -EINVAL; |
| 220 | } |
| 221 | |
| 222 | dev->mtu = new_mtu; |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr) |
| 227 | { |
| 228 | struct ieee80211_sub_if_data *sdata; |
| 229 | u64 new, mask, tmp; |
| 230 | u8 *m; |
| 231 | int ret = 0; |
| 232 | |
| 233 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) |
| 234 | return 0; |
| 235 | |
| 236 | m = addr; |
| 237 | new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 238 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 239 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 240 | |
| 241 | m = local->hw.wiphy->addr_mask; |
| 242 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 243 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 244 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 245 | |
| 246 | |
| 247 | mutex_lock(&local->iflist_mtx); |
| 248 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 249 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) |
| 250 | continue; |
| 251 | |
| 252 | m = sdata->vif.addr; |
| 253 | tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 254 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 255 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 256 | |
| 257 | if ((new & ~mask) != (tmp & ~mask)) { |
| 258 | ret = -EINVAL; |
| 259 | break; |
| 260 | } |
| 261 | } |
| 262 | mutex_unlock(&local->iflist_mtx); |
| 263 | |
| 264 | return ret; |
| 265 | } |
| 266 | |
| 267 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
| 268 | { |
| 269 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 270 | struct sockaddr *sa = addr; |
| 271 | int ret; |
| 272 | |
| 273 | if (ieee80211_sdata_running(sdata)) |
| 274 | return -EBUSY; |
| 275 | |
| 276 | ret = ieee80211_verify_mac(sdata->local, sa->sa_data); |
| 277 | if (ret) |
| 278 | return ret; |
| 279 | |
| 280 | ret = eth_mac_addr(dev, sa); |
| 281 | |
| 282 | if (ret == 0) |
| 283 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
| 284 | |
| 285 | return ret; |
| 286 | } |
| 287 | |
| 288 | static inline int identical_mac_addr_allowed(int type1, int type2) |
| 289 | { |
| 290 | return type1 == NL80211_IFTYPE_MONITOR || |
| 291 | type2 == NL80211_IFTYPE_MONITOR || |
| 292 | type1 == NL80211_IFTYPE_P2P_DEVICE || |
| 293 | type2 == NL80211_IFTYPE_P2P_DEVICE || |
| 294 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
| 295 | (type1 == NL80211_IFTYPE_WDS && |
| 296 | (type2 == NL80211_IFTYPE_WDS || |
| 297 | type2 == NL80211_IFTYPE_AP)) || |
| 298 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || |
| 299 | (type1 == NL80211_IFTYPE_AP_VLAN && |
| 300 | (type2 == NL80211_IFTYPE_AP || |
| 301 | type2 == NL80211_IFTYPE_AP_VLAN)); |
| 302 | } |
| 303 | |
| 304 | static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, |
| 305 | enum nl80211_iftype iftype) |
| 306 | { |
| 307 | struct ieee80211_local *local = sdata->local; |
| 308 | struct ieee80211_sub_if_data *nsdata; |
| 309 | |
| 310 | ASSERT_RTNL(); |
| 311 | |
| 312 | /* we hold the RTNL here so can safely walk the list */ |
| 313 | list_for_each_entry(nsdata, &local->interfaces, list) { |
| 314 | if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { |
| 315 | /* |
| 316 | * Allow only a single IBSS interface to be up at any |
| 317 | * time. This is restricted because beacon distribution |
| 318 | * cannot work properly if both are in the same IBSS. |
| 319 | * |
| 320 | * To remove this restriction we'd have to disallow them |
| 321 | * from setting the same SSID on different IBSS interfaces |
| 322 | * belonging to the same hardware. Then, however, we're |
| 323 | * faced with having to adopt two different TSF timers... |
| 324 | */ |
| 325 | if (iftype == NL80211_IFTYPE_ADHOC && |
| 326 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 327 | return -EBUSY; |
| 328 | |
| 329 | /* |
| 330 | * The remaining checks are only performed for interfaces |
| 331 | * with the same MAC address. |
| 332 | */ |
| 333 | if (!ether_addr_equal(sdata->vif.addr, |
| 334 | nsdata->vif.addr)) |
| 335 | continue; |
| 336 | |
| 337 | /* |
| 338 | * check whether it may have the same address |
| 339 | */ |
| 340 | if (!identical_mac_addr_allowed(iftype, |
| 341 | nsdata->vif.type)) |
| 342 | return -ENOTUNIQ; |
| 343 | |
| 344 | /* |
| 345 | * can only add VLANs to enabled APs |
| 346 | */ |
| 347 | if (iftype == NL80211_IFTYPE_AP_VLAN && |
| 348 | nsdata->vif.type == NL80211_IFTYPE_AP) |
| 349 | sdata->bss = &nsdata->u.ap; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata) |
| 357 | { |
| 358 | int n_queues = sdata->local->hw.queues; |
| 359 | int i; |
| 360 | |
| 361 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { |
| 362 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 363 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == |
| 364 | IEEE80211_INVAL_HW_QUEUE)) |
| 365 | return -EINVAL; |
| 366 | if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= |
| 367 | n_queues)) |
| 368 | return -EINVAL; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | if ((sdata->vif.type != NL80211_IFTYPE_AP) || |
| 373 | !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) { |
| 374 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) |
| 379 | return -EINVAL; |
| 380 | |
| 381 | if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) |
| 382 | return -EINVAL; |
| 383 | |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, |
| 388 | const int offset) |
| 389 | { |
| 390 | struct ieee80211_local *local = sdata->local; |
| 391 | u32 flags = sdata->u.mntr_flags; |
| 392 | |
| 393 | #define ADJUST(_f, _s) do { \ |
| 394 | if (flags & MONITOR_FLAG_##_f) \ |
| 395 | local->fif_##_s += offset; \ |
| 396 | } while (0) |
| 397 | |
| 398 | ADJUST(FCSFAIL, fcsfail); |
| 399 | ADJUST(PLCPFAIL, plcpfail); |
| 400 | ADJUST(CONTROL, control); |
| 401 | ADJUST(CONTROL, pspoll); |
| 402 | ADJUST(OTHER_BSS, other_bss); |
| 403 | |
| 404 | #undef ADJUST |
| 405 | } |
| 406 | |
| 407 | static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) |
| 408 | { |
| 409 | struct ieee80211_local *local = sdata->local; |
| 410 | int i; |
| 411 | |
| 412 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 413 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
| 414 | sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; |
| 415 | else if (local->hw.queues >= IEEE80211_NUM_ACS) |
| 416 | sdata->vif.hw_queue[i] = i; |
| 417 | else |
| 418 | sdata->vif.hw_queue[i] = 0; |
| 419 | } |
| 420 | sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
| 421 | } |
| 422 | |
| 423 | static int ieee80211_add_virtual_monitor(struct ieee80211_local *local) |
| 424 | { |
| 425 | struct ieee80211_sub_if_data *sdata; |
| 426 | int ret = 0; |
| 427 | |
| 428 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) |
| 429 | return 0; |
| 430 | |
| 431 | mutex_lock(&local->iflist_mtx); |
| 432 | |
| 433 | if (local->monitor_sdata) |
| 434 | goto out_unlock; |
| 435 | |
| 436 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); |
| 437 | if (!sdata) { |
| 438 | ret = -ENOMEM; |
| 439 | goto out_unlock; |
| 440 | } |
| 441 | |
| 442 | /* set up data */ |
| 443 | sdata->local = local; |
| 444 | sdata->vif.type = NL80211_IFTYPE_MONITOR; |
| 445 | snprintf(sdata->name, IFNAMSIZ, "%s-monitor", |
| 446 | wiphy_name(local->hw.wiphy)); |
| 447 | |
| 448 | ieee80211_set_default_queues(sdata); |
| 449 | |
| 450 | ret = drv_add_interface(local, sdata); |
| 451 | if (WARN_ON(ret)) { |
| 452 | /* ok .. stupid driver, it asked for this! */ |
| 453 | kfree(sdata); |
| 454 | goto out_unlock; |
| 455 | } |
| 456 | |
| 457 | ret = ieee80211_check_queues(sdata); |
| 458 | if (ret) { |
| 459 | kfree(sdata); |
| 460 | goto out_unlock; |
| 461 | } |
| 462 | |
| 463 | ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, |
| 464 | IEEE80211_CHANCTX_EXCLUSIVE); |
| 465 | if (ret) { |
| 466 | drv_remove_interface(local, sdata); |
| 467 | kfree(sdata); |
| 468 | goto out_unlock; |
| 469 | } |
| 470 | |
| 471 | rcu_assign_pointer(local->monitor_sdata, sdata); |
| 472 | out_unlock: |
| 473 | mutex_unlock(&local->iflist_mtx); |
| 474 | return ret; |
| 475 | } |
| 476 | |
| 477 | static void ieee80211_del_virtual_monitor(struct ieee80211_local *local) |
| 478 | { |
| 479 | struct ieee80211_sub_if_data *sdata; |
| 480 | |
| 481 | if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) |
| 482 | return; |
| 483 | |
| 484 | mutex_lock(&local->iflist_mtx); |
| 485 | |
| 486 | sdata = rcu_dereference_protected(local->monitor_sdata, |
| 487 | lockdep_is_held(&local->iflist_mtx)); |
| 488 | if (!sdata) |
| 489 | goto out_unlock; |
| 490 | |
| 491 | rcu_assign_pointer(local->monitor_sdata, NULL); |
| 492 | synchronize_net(); |
| 493 | |
| 494 | ieee80211_vif_release_channel(sdata); |
| 495 | |
| 496 | drv_remove_interface(local, sdata); |
| 497 | |
| 498 | kfree(sdata); |
| 499 | out_unlock: |
| 500 | mutex_unlock(&local->iflist_mtx); |
| 501 | } |
| 502 | |
| 503 | /* |
| 504 | * NOTE: Be very careful when changing this function, it must NOT return |
| 505 | * an error on interface type changes that have been pre-checked, so most |
| 506 | * checks should be in ieee80211_check_concurrent_iface. |
| 507 | */ |
| 508 | int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) |
| 509 | { |
| 510 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); |
| 511 | struct net_device *dev = wdev->netdev; |
| 512 | struct ieee80211_local *local = sdata->local; |
| 513 | struct sta_info *sta; |
| 514 | u32 changed = 0; |
| 515 | int res; |
| 516 | u32 hw_reconf_flags = 0; |
| 517 | |
| 518 | switch (sdata->vif.type) { |
| 519 | case NL80211_IFTYPE_WDS: |
| 520 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) |
| 521 | return -ENOLINK; |
| 522 | break; |
| 523 | case NL80211_IFTYPE_AP_VLAN: { |
| 524 | struct ieee80211_sub_if_data *master; |
| 525 | |
| 526 | if (!sdata->bss) |
| 527 | return -ENOLINK; |
| 528 | |
| 529 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
| 530 | |
| 531 | master = container_of(sdata->bss, |
| 532 | struct ieee80211_sub_if_data, u.ap); |
| 533 | sdata->control_port_protocol = |
| 534 | master->control_port_protocol; |
| 535 | sdata->control_port_no_encrypt = |
| 536 | master->control_port_no_encrypt; |
| 537 | break; |
| 538 | } |
| 539 | case NL80211_IFTYPE_AP: |
| 540 | sdata->bss = &sdata->u.ap; |
| 541 | break; |
| 542 | case NL80211_IFTYPE_MESH_POINT: |
| 543 | case NL80211_IFTYPE_STATION: |
| 544 | case NL80211_IFTYPE_MONITOR: |
| 545 | case NL80211_IFTYPE_ADHOC: |
| 546 | case NL80211_IFTYPE_P2P_DEVICE: |
| 547 | /* no special treatment */ |
| 548 | break; |
| 549 | case NL80211_IFTYPE_UNSPECIFIED: |
| 550 | case NUM_NL80211_IFTYPES: |
| 551 | case NL80211_IFTYPE_P2P_CLIENT: |
| 552 | case NL80211_IFTYPE_P2P_GO: |
| 553 | /* cannot happen */ |
| 554 | WARN_ON(1); |
| 555 | break; |
| 556 | } |
| 557 | |
| 558 | if (local->open_count == 0) { |
| 559 | res = drv_start(local); |
| 560 | if (res) |
| 561 | goto err_del_bss; |
| 562 | if (local->ops->napi_poll) |
| 563 | napi_enable(&local->napi); |
| 564 | /* we're brought up, everything changes */ |
| 565 | hw_reconf_flags = ~0; |
| 566 | ieee80211_led_radio(local, true); |
| 567 | ieee80211_mod_tpt_led_trig(local, |
| 568 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * Copy the hopefully now-present MAC address to |
| 573 | * this interface, if it has the special null one. |
| 574 | */ |
| 575 | if (dev && is_zero_ether_addr(dev->dev_addr)) { |
| 576 | memcpy(dev->dev_addr, |
| 577 | local->hw.wiphy->perm_addr, |
| 578 | ETH_ALEN); |
| 579 | memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); |
| 580 | |
| 581 | if (!is_valid_ether_addr(dev->dev_addr)) { |
| 582 | res = -EADDRNOTAVAIL; |
| 583 | goto err_stop; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | switch (sdata->vif.type) { |
| 588 | case NL80211_IFTYPE_AP_VLAN: |
| 589 | /* no need to tell driver, but set carrier */ |
| 590 | if (rtnl_dereference(sdata->bss->beacon)) |
| 591 | netif_carrier_on(dev); |
| 592 | else |
| 593 | netif_carrier_off(dev); |
| 594 | break; |
| 595 | case NL80211_IFTYPE_MONITOR: |
| 596 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
| 597 | local->cooked_mntrs++; |
| 598 | break; |
| 599 | } |
| 600 | |
| 601 | if (local->monitors == 0 && local->open_count == 0) { |
| 602 | res = ieee80211_add_virtual_monitor(local); |
| 603 | if (res) |
| 604 | goto err_stop; |
| 605 | } |
| 606 | |
| 607 | /* must be before the call to ieee80211_configure_filter */ |
| 608 | local->monitors++; |
| 609 | if (local->monitors == 1) { |
| 610 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
| 611 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
| 612 | } |
| 613 | |
| 614 | ieee80211_adjust_monitor_flags(sdata, 1); |
| 615 | ieee80211_configure_filter(local); |
| 616 | |
| 617 | netif_carrier_on(dev); |
| 618 | break; |
| 619 | default: |
| 620 | if (coming_up) { |
| 621 | ieee80211_del_virtual_monitor(local); |
| 622 | |
| 623 | res = drv_add_interface(local, sdata); |
| 624 | if (res) |
| 625 | goto err_stop; |
| 626 | res = ieee80211_check_queues(sdata); |
| 627 | if (res) |
| 628 | goto err_del_interface; |
| 629 | } |
| 630 | |
| 631 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 632 | local->fif_pspoll++; |
| 633 | local->fif_probe_req++; |
| 634 | |
| 635 | ieee80211_configure_filter(local); |
| 636 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
| 637 | local->fif_probe_req++; |
| 638 | } |
| 639 | |
| 640 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) |
| 641 | changed |= ieee80211_reset_erp_info(sdata); |
| 642 | ieee80211_bss_info_change_notify(sdata, changed); |
| 643 | |
| 644 | switch (sdata->vif.type) { |
| 645 | case NL80211_IFTYPE_STATION: |
| 646 | case NL80211_IFTYPE_ADHOC: |
| 647 | case NL80211_IFTYPE_AP: |
| 648 | case NL80211_IFTYPE_MESH_POINT: |
| 649 | netif_carrier_off(dev); |
| 650 | break; |
| 651 | case NL80211_IFTYPE_WDS: |
| 652 | case NL80211_IFTYPE_P2P_DEVICE: |
| 653 | break; |
| 654 | default: |
| 655 | netif_carrier_on(dev); |
| 656 | } |
| 657 | |
| 658 | /* |
| 659 | * set default queue parameters so drivers don't |
| 660 | * need to initialise the hardware if the hardware |
| 661 | * doesn't start up with sane defaults |
| 662 | */ |
| 663 | ieee80211_set_wmm_default(sdata, true); |
| 664 | } |
| 665 | |
| 666 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
| 667 | |
| 668 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
| 669 | /* Create STA entry for the WDS peer */ |
| 670 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, |
| 671 | GFP_KERNEL); |
| 672 | if (!sta) { |
| 673 | res = -ENOMEM; |
| 674 | goto err_del_interface; |
| 675 | } |
| 676 | |
| 677 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
| 678 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); |
| 679 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); |
| 680 | |
| 681 | res = sta_info_insert(sta); |
| 682 | if (res) { |
| 683 | /* STA has been freed */ |
| 684 | goto err_del_interface; |
| 685 | } |
| 686 | |
| 687 | rate_control_rate_init(sta); |
| 688 | netif_carrier_on(dev); |
| 689 | } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
| 690 | rcu_assign_pointer(local->p2p_sdata, sdata); |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * set_multicast_list will be invoked by the networking core |
| 695 | * which will check whether any increments here were done in |
| 696 | * error and sync them down to the hardware as filter flags. |
| 697 | */ |
| 698 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| 699 | atomic_inc(&local->iff_allmultis); |
| 700 | |
| 701 | if (sdata->flags & IEEE80211_SDATA_PROMISC) |
| 702 | atomic_inc(&local->iff_promiscs); |
| 703 | |
| 704 | mutex_lock(&local->mtx); |
| 705 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
| 706 | mutex_unlock(&local->mtx); |
| 707 | |
| 708 | if (coming_up) |
| 709 | local->open_count++; |
| 710 | |
| 711 | if (hw_reconf_flags) |
| 712 | ieee80211_hw_config(local, hw_reconf_flags); |
| 713 | |
| 714 | ieee80211_recalc_ps(local, -1); |
| 715 | |
| 716 | if (dev) |
| 717 | netif_tx_start_all_queues(dev); |
| 718 | |
| 719 | return 0; |
| 720 | err_del_interface: |
| 721 | drv_remove_interface(local, sdata); |
| 722 | err_stop: |
| 723 | if (!local->open_count) |
| 724 | drv_stop(local); |
| 725 | err_del_bss: |
| 726 | sdata->bss = NULL; |
| 727 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 728 | list_del(&sdata->u.vlan.list); |
| 729 | /* might already be clear but that doesn't matter */ |
| 730 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
| 731 | return res; |
| 732 | } |
| 733 | |
| 734 | static int ieee80211_open(struct net_device *dev) |
| 735 | { |
| 736 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 737 | int err; |
| 738 | |
| 739 | /* fail early if user set an invalid address */ |
| 740 | if (!is_valid_ether_addr(dev->dev_addr)) |
| 741 | return -EADDRNOTAVAIL; |
| 742 | |
| 743 | err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); |
| 744 | if (err) |
| 745 | return err; |
| 746 | |
| 747 | return ieee80211_do_open(&sdata->wdev, true); |
| 748 | } |
| 749 | |
| 750 | static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, |
| 751 | bool going_down) |
| 752 | { |
| 753 | struct ieee80211_local *local = sdata->local; |
| 754 | unsigned long flags; |
| 755 | struct sk_buff *skb, *tmp; |
| 756 | u32 hw_reconf_flags = 0; |
| 757 | int i; |
| 758 | |
| 759 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
| 760 | |
| 761 | if (rcu_access_pointer(local->scan_sdata) == sdata) |
| 762 | ieee80211_scan_cancel(local); |
| 763 | |
| 764 | /* |
| 765 | * Stop TX on this interface first. |
| 766 | */ |
| 767 | if (sdata->dev) |
| 768 | netif_tx_stop_all_queues(sdata->dev); |
| 769 | |
| 770 | ieee80211_roc_purge(sdata); |
| 771 | |
| 772 | /* |
| 773 | * Remove all stations associated with this interface. |
| 774 | * |
| 775 | * This must be done before calling ops->remove_interface() |
| 776 | * because otherwise we can later invoke ops->sta_notify() |
| 777 | * whenever the STAs are removed, and that invalidates driver |
| 778 | * assumptions about always getting a vif pointer that is valid |
| 779 | * (because if we remove a STA after ops->remove_interface() |
| 780 | * the driver will have removed the vif info already!) |
| 781 | * |
| 782 | * This is relevant only in AP, WDS and mesh modes, since in |
| 783 | * all other modes we've already removed all stations when |
| 784 | * disconnecting etc. |
| 785 | */ |
| 786 | sta_info_flush(local, sdata); |
| 787 | |
| 788 | /* |
| 789 | * Don't count this interface for promisc/allmulti while it |
| 790 | * is down. dev_mc_unsync() will invoke set_multicast_list |
| 791 | * on the master interface which will sync these down to the |
| 792 | * hardware as filter flags. |
| 793 | */ |
| 794 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| 795 | atomic_dec(&local->iff_allmultis); |
| 796 | |
| 797 | if (sdata->flags & IEEE80211_SDATA_PROMISC) |
| 798 | atomic_dec(&local->iff_promiscs); |
| 799 | |
| 800 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 801 | local->fif_pspoll--; |
| 802 | local->fif_probe_req--; |
| 803 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
| 804 | local->fif_probe_req--; |
| 805 | } |
| 806 | |
| 807 | if (sdata->dev) { |
| 808 | netif_addr_lock_bh(sdata->dev); |
| 809 | spin_lock_bh(&local->filter_lock); |
| 810 | __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, |
| 811 | sdata->dev->addr_len); |
| 812 | spin_unlock_bh(&local->filter_lock); |
| 813 | netif_addr_unlock_bh(sdata->dev); |
| 814 | |
| 815 | ieee80211_configure_filter(local); |
| 816 | } |
| 817 | |
| 818 | del_timer_sync(&local->dynamic_ps_timer); |
| 819 | cancel_work_sync(&local->dynamic_ps_enable_work); |
| 820 | |
| 821 | cancel_work_sync(&sdata->recalc_smps); |
| 822 | |
| 823 | /* APs need special treatment */ |
| 824 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 825 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
| 826 | |
| 827 | /* down all dependent devices, that is VLANs */ |
| 828 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
| 829 | u.vlan.list) |
| 830 | dev_close(vlan->dev); |
| 831 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); |
| 832 | } else if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
| 833 | ieee80211_mgd_stop(sdata); |
| 834 | } |
| 835 | |
| 836 | if (going_down) |
| 837 | local->open_count--; |
| 838 | |
| 839 | switch (sdata->vif.type) { |
| 840 | case NL80211_IFTYPE_AP_VLAN: |
| 841 | list_del(&sdata->u.vlan.list); |
| 842 | /* no need to tell driver */ |
| 843 | break; |
| 844 | case NL80211_IFTYPE_MONITOR: |
| 845 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
| 846 | local->cooked_mntrs--; |
| 847 | break; |
| 848 | } |
| 849 | |
| 850 | local->monitors--; |
| 851 | if (local->monitors == 0) { |
| 852 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
| 853 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
| 854 | ieee80211_del_virtual_monitor(local); |
| 855 | } |
| 856 | |
| 857 | ieee80211_adjust_monitor_flags(sdata, -1); |
| 858 | ieee80211_configure_filter(local); |
| 859 | break; |
| 860 | case NL80211_IFTYPE_P2P_DEVICE: |
| 861 | /* relies on synchronize_rcu() below */ |
| 862 | rcu_assign_pointer(local->p2p_sdata, NULL); |
| 863 | /* fall through */ |
| 864 | default: |
| 865 | flush_work(&sdata->work); |
| 866 | /* |
| 867 | * When we get here, the interface is marked down. |
| 868 | * Call rcu_barrier() to wait both for the RX path |
| 869 | * should it be using the interface and enqueuing |
| 870 | * frames at this very time on another CPU, and |
| 871 | * for the sta free call_rcu callbacks. |
| 872 | */ |
| 873 | rcu_barrier(); |
| 874 | |
| 875 | /* |
| 876 | * free_sta_rcu() enqueues a work for the actual |
| 877 | * sta cleanup, so we need to flush it while |
| 878 | * sdata is still valid. |
| 879 | */ |
| 880 | flush_workqueue(local->workqueue); |
| 881 | |
| 882 | skb_queue_purge(&sdata->skb_queue); |
| 883 | |
| 884 | /* |
| 885 | * Free all remaining keys, there shouldn't be any, |
| 886 | * except maybe group keys in AP more or WDS? |
| 887 | */ |
| 888 | ieee80211_free_keys(sdata); |
| 889 | |
| 890 | if (going_down) |
| 891 | drv_remove_interface(local, sdata); |
| 892 | } |
| 893 | |
| 894 | sdata->bss = NULL; |
| 895 | |
| 896 | mutex_lock(&local->mtx); |
| 897 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
| 898 | mutex_unlock(&local->mtx); |
| 899 | |
| 900 | ieee80211_recalc_ps(local, -1); |
| 901 | |
| 902 | if (local->open_count == 0) { |
| 903 | if (local->ops->napi_poll) |
| 904 | napi_disable(&local->napi); |
| 905 | ieee80211_clear_tx_pending(local); |
| 906 | ieee80211_stop_device(local); |
| 907 | |
| 908 | /* no reconfiguring after stop! */ |
| 909 | hw_reconf_flags = 0; |
| 910 | } |
| 911 | |
| 912 | /* do after stop to avoid reconfiguring when we stop anyway */ |
| 913 | if (hw_reconf_flags) |
| 914 | ieee80211_hw_config(local, hw_reconf_flags); |
| 915 | |
| 916 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 917 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { |
| 918 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { |
| 919 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 920 | if (info->control.vif == &sdata->vif) { |
| 921 | __skb_unlink(skb, &local->pending[i]); |
| 922 | ieee80211_free_txskb(&local->hw, skb); |
| 923 | } |
| 924 | } |
| 925 | } |
| 926 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 927 | |
| 928 | if (local->monitors == local->open_count && local->monitors > 0) |
| 929 | ieee80211_add_virtual_monitor(local); |
| 930 | } |
| 931 | |
| 932 | static int ieee80211_stop(struct net_device *dev) |
| 933 | { |
| 934 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 935 | |
| 936 | ieee80211_do_stop(sdata, true); |
| 937 | |
| 938 | return 0; |
| 939 | } |
| 940 | |
| 941 | static void ieee80211_set_multicast_list(struct net_device *dev) |
| 942 | { |
| 943 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 944 | struct ieee80211_local *local = sdata->local; |
| 945 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
| 946 | |
| 947 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
| 948 | promisc = !!(dev->flags & IFF_PROMISC); |
| 949 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
| 950 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); |
| 951 | |
| 952 | if (allmulti != sdata_allmulti) { |
| 953 | if (dev->flags & IFF_ALLMULTI) |
| 954 | atomic_inc(&local->iff_allmultis); |
| 955 | else |
| 956 | atomic_dec(&local->iff_allmultis); |
| 957 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
| 958 | } |
| 959 | |
| 960 | if (promisc != sdata_promisc) { |
| 961 | if (dev->flags & IFF_PROMISC) |
| 962 | atomic_inc(&local->iff_promiscs); |
| 963 | else |
| 964 | atomic_dec(&local->iff_promiscs); |
| 965 | sdata->flags ^= IEEE80211_SDATA_PROMISC; |
| 966 | } |
| 967 | spin_lock_bh(&local->filter_lock); |
| 968 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
| 969 | spin_unlock_bh(&local->filter_lock); |
| 970 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
| 971 | } |
| 972 | |
| 973 | /* |
| 974 | * Called when the netdev is removed or, by the code below, before |
| 975 | * the interface type changes. |
| 976 | */ |
| 977 | static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) |
| 978 | { |
| 979 | struct ieee80211_local *local = sdata->local; |
| 980 | int flushed; |
| 981 | int i; |
| 982 | |
| 983 | /* free extra data */ |
| 984 | ieee80211_free_keys(sdata); |
| 985 | |
| 986 | ieee80211_debugfs_remove_netdev(sdata); |
| 987 | |
| 988 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| 989 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
| 990 | sdata->fragment_next = 0; |
| 991 | |
| 992 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 993 | mesh_rmc_free(sdata); |
| 994 | |
| 995 | flushed = sta_info_flush(local, sdata); |
| 996 | WARN_ON(flushed); |
| 997 | } |
| 998 | |
| 999 | static void ieee80211_uninit(struct net_device *dev) |
| 1000 | { |
| 1001 | ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); |
| 1002 | } |
| 1003 | |
| 1004 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
| 1005 | struct sk_buff *skb) |
| 1006 | { |
| 1007 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); |
| 1008 | } |
| 1009 | |
| 1010 | static const struct net_device_ops ieee80211_dataif_ops = { |
| 1011 | .ndo_open = ieee80211_open, |
| 1012 | .ndo_stop = ieee80211_stop, |
| 1013 | .ndo_uninit = ieee80211_uninit, |
| 1014 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
| 1015 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
| 1016 | .ndo_change_mtu = ieee80211_change_mtu, |
| 1017 | .ndo_set_mac_address = ieee80211_change_mac, |
| 1018 | .ndo_select_queue = ieee80211_netdev_select_queue, |
| 1019 | }; |
| 1020 | |
| 1021 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
| 1022 | struct sk_buff *skb) |
| 1023 | { |
| 1024 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1025 | struct ieee80211_local *local = sdata->local; |
| 1026 | struct ieee80211_hdr *hdr; |
| 1027 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; |
| 1028 | |
| 1029 | if (local->hw.queues < IEEE80211_NUM_ACS) |
| 1030 | return 0; |
| 1031 | |
| 1032 | if (skb->len < 4 || |
| 1033 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
| 1034 | return 0; /* doesn't matter, frame will be dropped */ |
| 1035 | |
| 1036 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
| 1037 | |
| 1038 | return ieee80211_select_queue_80211(sdata, skb, hdr); |
| 1039 | } |
| 1040 | |
| 1041 | static const struct net_device_ops ieee80211_monitorif_ops = { |
| 1042 | .ndo_open = ieee80211_open, |
| 1043 | .ndo_stop = ieee80211_stop, |
| 1044 | .ndo_uninit = ieee80211_uninit, |
| 1045 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
| 1046 | .ndo_set_rx_mode = ieee80211_set_multicast_list, |
| 1047 | .ndo_change_mtu = ieee80211_change_mtu, |
| 1048 | .ndo_set_mac_address = eth_mac_addr, |
| 1049 | .ndo_select_queue = ieee80211_monitor_select_queue, |
| 1050 | }; |
| 1051 | |
| 1052 | static void ieee80211_if_setup(struct net_device *dev) |
| 1053 | { |
| 1054 | ether_setup(dev); |
| 1055 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
| 1056 | dev->netdev_ops = &ieee80211_dataif_ops; |
| 1057 | dev->destructor = free_netdev; |
| 1058 | } |
| 1059 | |
| 1060 | static void ieee80211_iface_work(struct work_struct *work) |
| 1061 | { |
| 1062 | struct ieee80211_sub_if_data *sdata = |
| 1063 | container_of(work, struct ieee80211_sub_if_data, work); |
| 1064 | struct ieee80211_local *local = sdata->local; |
| 1065 | struct sk_buff *skb; |
| 1066 | struct sta_info *sta; |
| 1067 | struct ieee80211_ra_tid *ra_tid; |
| 1068 | |
| 1069 | if (!ieee80211_sdata_running(sdata)) |
| 1070 | return; |
| 1071 | |
| 1072 | if (local->scanning) |
| 1073 | return; |
| 1074 | |
| 1075 | /* |
| 1076 | * ieee80211_queue_work() should have picked up most cases, |
| 1077 | * here we'll pick the rest. |
| 1078 | */ |
| 1079 | if (WARN(local->suspended, |
| 1080 | "interface work scheduled while going to suspend\n")) |
| 1081 | return; |
| 1082 | |
| 1083 | /* first process frames */ |
| 1084 | while ((skb = skb_dequeue(&sdata->skb_queue))) { |
| 1085 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
| 1086 | |
| 1087 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
| 1088 | ra_tid = (void *)&skb->cb; |
| 1089 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, |
| 1090 | ra_tid->tid); |
| 1091 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { |
| 1092 | ra_tid = (void *)&skb->cb; |
| 1093 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, |
| 1094 | ra_tid->tid); |
| 1095 | } else if (ieee80211_is_action(mgmt->frame_control) && |
| 1096 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { |
| 1097 | int len = skb->len; |
| 1098 | |
| 1099 | mutex_lock(&local->sta_mtx); |
| 1100 | sta = sta_info_get_bss(sdata, mgmt->sa); |
| 1101 | if (sta) { |
| 1102 | switch (mgmt->u.action.u.addba_req.action_code) { |
| 1103 | case WLAN_ACTION_ADDBA_REQ: |
| 1104 | ieee80211_process_addba_request( |
| 1105 | local, sta, mgmt, len); |
| 1106 | break; |
| 1107 | case WLAN_ACTION_ADDBA_RESP: |
| 1108 | ieee80211_process_addba_resp(local, sta, |
| 1109 | mgmt, len); |
| 1110 | break; |
| 1111 | case WLAN_ACTION_DELBA: |
| 1112 | ieee80211_process_delba(sdata, sta, |
| 1113 | mgmt, len); |
| 1114 | break; |
| 1115 | default: |
| 1116 | WARN_ON(1); |
| 1117 | break; |
| 1118 | } |
| 1119 | } |
| 1120 | mutex_unlock(&local->sta_mtx); |
| 1121 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
| 1122 | struct ieee80211_hdr *hdr = (void *)mgmt; |
| 1123 | /* |
| 1124 | * So the frame isn't mgmt, but frame_control |
| 1125 | * is at the right place anyway, of course, so |
| 1126 | * the if statement is correct. |
| 1127 | * |
| 1128 | * Warn if we have other data frame types here, |
| 1129 | * they must not get here. |
| 1130 | */ |
| 1131 | WARN_ON(hdr->frame_control & |
| 1132 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); |
| 1133 | WARN_ON(!(hdr->seq_ctrl & |
| 1134 | cpu_to_le16(IEEE80211_SCTL_FRAG))); |
| 1135 | /* |
| 1136 | * This was a fragment of a frame, received while |
| 1137 | * a block-ack session was active. That cannot be |
| 1138 | * right, so terminate the session. |
| 1139 | */ |
| 1140 | mutex_lock(&local->sta_mtx); |
| 1141 | sta = sta_info_get_bss(sdata, mgmt->sa); |
| 1142 | if (sta) { |
| 1143 | u16 tid = *ieee80211_get_qos_ctl(hdr) & |
| 1144 | IEEE80211_QOS_CTL_TID_MASK; |
| 1145 | |
| 1146 | __ieee80211_stop_rx_ba_session( |
| 1147 | sta, tid, WLAN_BACK_RECIPIENT, |
| 1148 | WLAN_REASON_QSTA_REQUIRE_SETUP, |
| 1149 | true); |
| 1150 | } |
| 1151 | mutex_unlock(&local->sta_mtx); |
| 1152 | } else switch (sdata->vif.type) { |
| 1153 | case NL80211_IFTYPE_STATION: |
| 1154 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
| 1155 | break; |
| 1156 | case NL80211_IFTYPE_ADHOC: |
| 1157 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); |
| 1158 | break; |
| 1159 | case NL80211_IFTYPE_MESH_POINT: |
| 1160 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 1161 | break; |
| 1162 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); |
| 1163 | break; |
| 1164 | default: |
| 1165 | WARN(1, "frame for unexpected interface type"); |
| 1166 | break; |
| 1167 | } |
| 1168 | |
| 1169 | kfree_skb(skb); |
| 1170 | } |
| 1171 | |
| 1172 | /* then other type-dependent work */ |
| 1173 | switch (sdata->vif.type) { |
| 1174 | case NL80211_IFTYPE_STATION: |
| 1175 | ieee80211_sta_work(sdata); |
| 1176 | break; |
| 1177 | case NL80211_IFTYPE_ADHOC: |
| 1178 | ieee80211_ibss_work(sdata); |
| 1179 | break; |
| 1180 | case NL80211_IFTYPE_MESH_POINT: |
| 1181 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 1182 | break; |
| 1183 | ieee80211_mesh_work(sdata); |
| 1184 | break; |
| 1185 | default: |
| 1186 | break; |
| 1187 | } |
| 1188 | } |
| 1189 | |
| 1190 | static void ieee80211_recalc_smps_work(struct work_struct *work) |
| 1191 | { |
| 1192 | struct ieee80211_sub_if_data *sdata = |
| 1193 | container_of(work, struct ieee80211_sub_if_data, recalc_smps); |
| 1194 | |
| 1195 | ieee80211_recalc_smps(sdata); |
| 1196 | } |
| 1197 | |
| 1198 | /* |
| 1199 | * Helper function to initialise an interface to a specific type. |
| 1200 | */ |
| 1201 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, |
| 1202 | enum nl80211_iftype type) |
| 1203 | { |
| 1204 | /* clear type-dependent union */ |
| 1205 | memset(&sdata->u, 0, sizeof(sdata->u)); |
| 1206 | |
| 1207 | /* and set some type-dependent values */ |
| 1208 | sdata->vif.type = type; |
| 1209 | sdata->vif.p2p = false; |
| 1210 | sdata->wdev.iftype = type; |
| 1211 | |
| 1212 | sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
| 1213 | sdata->control_port_no_encrypt = false; |
| 1214 | |
| 1215 | sdata->noack_map = 0; |
| 1216 | |
| 1217 | /* only monitor/p2p-device differ */ |
| 1218 | if (sdata->dev) { |
| 1219 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
| 1220 | sdata->dev->type = ARPHRD_ETHER; |
| 1221 | } |
| 1222 | |
| 1223 | skb_queue_head_init(&sdata->skb_queue); |
| 1224 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
| 1225 | INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); |
| 1226 | |
| 1227 | switch (type) { |
| 1228 | case NL80211_IFTYPE_P2P_GO: |
| 1229 | type = NL80211_IFTYPE_AP; |
| 1230 | sdata->vif.type = type; |
| 1231 | sdata->vif.p2p = true; |
| 1232 | /* fall through */ |
| 1233 | case NL80211_IFTYPE_AP: |
| 1234 | skb_queue_head_init(&sdata->u.ap.ps.bc_buf); |
| 1235 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
| 1236 | break; |
| 1237 | case NL80211_IFTYPE_P2P_CLIENT: |
| 1238 | type = NL80211_IFTYPE_STATION; |
| 1239 | sdata->vif.type = type; |
| 1240 | sdata->vif.p2p = true; |
| 1241 | /* fall through */ |
| 1242 | case NL80211_IFTYPE_STATION: |
| 1243 | ieee80211_sta_setup_sdata(sdata); |
| 1244 | break; |
| 1245 | case NL80211_IFTYPE_ADHOC: |
| 1246 | ieee80211_ibss_setup_sdata(sdata); |
| 1247 | break; |
| 1248 | case NL80211_IFTYPE_MESH_POINT: |
| 1249 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 1250 | ieee80211_mesh_init_sdata(sdata); |
| 1251 | break; |
| 1252 | case NL80211_IFTYPE_MONITOR: |
| 1253 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
| 1254 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
| 1255 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
| 1256 | MONITOR_FLAG_OTHER_BSS; |
| 1257 | break; |
| 1258 | case NL80211_IFTYPE_WDS: |
| 1259 | case NL80211_IFTYPE_AP_VLAN: |
| 1260 | case NL80211_IFTYPE_P2P_DEVICE: |
| 1261 | break; |
| 1262 | case NL80211_IFTYPE_UNSPECIFIED: |
| 1263 | case NUM_NL80211_IFTYPES: |
| 1264 | BUG(); |
| 1265 | break; |
| 1266 | } |
| 1267 | |
| 1268 | ieee80211_debugfs_add_netdev(sdata); |
| 1269 | } |
| 1270 | |
| 1271 | static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
| 1272 | enum nl80211_iftype type) |
| 1273 | { |
| 1274 | struct ieee80211_local *local = sdata->local; |
| 1275 | int ret, err; |
| 1276 | enum nl80211_iftype internal_type = type; |
| 1277 | bool p2p = false; |
| 1278 | |
| 1279 | ASSERT_RTNL(); |
| 1280 | |
| 1281 | if (!local->ops->change_interface) |
| 1282 | return -EBUSY; |
| 1283 | |
| 1284 | switch (sdata->vif.type) { |
| 1285 | case NL80211_IFTYPE_AP: |
| 1286 | case NL80211_IFTYPE_STATION: |
| 1287 | case NL80211_IFTYPE_ADHOC: |
| 1288 | /* |
| 1289 | * Could maybe also all others here? |
| 1290 | * Just not sure how that interacts |
| 1291 | * with the RX/config path e.g. for |
| 1292 | * mesh. |
| 1293 | */ |
| 1294 | break; |
| 1295 | default: |
| 1296 | return -EBUSY; |
| 1297 | } |
| 1298 | |
| 1299 | switch (type) { |
| 1300 | case NL80211_IFTYPE_AP: |
| 1301 | case NL80211_IFTYPE_STATION: |
| 1302 | case NL80211_IFTYPE_ADHOC: |
| 1303 | /* |
| 1304 | * Could probably support everything |
| 1305 | * but WDS here (WDS do_open can fail |
| 1306 | * under memory pressure, which this |
| 1307 | * code isn't prepared to handle). |
| 1308 | */ |
| 1309 | break; |
| 1310 | case NL80211_IFTYPE_P2P_CLIENT: |
| 1311 | p2p = true; |
| 1312 | internal_type = NL80211_IFTYPE_STATION; |
| 1313 | break; |
| 1314 | case NL80211_IFTYPE_P2P_GO: |
| 1315 | p2p = true; |
| 1316 | internal_type = NL80211_IFTYPE_AP; |
| 1317 | break; |
| 1318 | default: |
| 1319 | return -EBUSY; |
| 1320 | } |
| 1321 | |
| 1322 | ret = ieee80211_check_concurrent_iface(sdata, internal_type); |
| 1323 | if (ret) |
| 1324 | return ret; |
| 1325 | |
| 1326 | ieee80211_do_stop(sdata, false); |
| 1327 | |
| 1328 | ieee80211_teardown_sdata(sdata); |
| 1329 | |
| 1330 | ret = drv_change_interface(local, sdata, internal_type, p2p); |
| 1331 | if (ret) |
| 1332 | type = sdata->vif.type; |
| 1333 | |
| 1334 | /* |
| 1335 | * Ignore return value here, there's not much we can do since |
| 1336 | * the driver changed the interface type internally already. |
| 1337 | * The warnings will hopefully make driver authors fix it :-) |
| 1338 | */ |
| 1339 | ieee80211_check_queues(sdata); |
| 1340 | |
| 1341 | ieee80211_setup_sdata(sdata, type); |
| 1342 | |
| 1343 | err = ieee80211_do_open(&sdata->wdev, false); |
| 1344 | WARN(err, "type change: do_open returned %d", err); |
| 1345 | |
| 1346 | return ret; |
| 1347 | } |
| 1348 | |
| 1349 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
| 1350 | enum nl80211_iftype type) |
| 1351 | { |
| 1352 | int ret; |
| 1353 | |
| 1354 | ASSERT_RTNL(); |
| 1355 | |
| 1356 | if (type == ieee80211_vif_type_p2p(&sdata->vif)) |
| 1357 | return 0; |
| 1358 | |
| 1359 | if (ieee80211_sdata_running(sdata)) { |
| 1360 | ret = ieee80211_runtime_change_iftype(sdata, type); |
| 1361 | if (ret) |
| 1362 | return ret; |
| 1363 | } else { |
| 1364 | /* Purge and reset type-dependent state. */ |
| 1365 | ieee80211_teardown_sdata(sdata); |
| 1366 | ieee80211_setup_sdata(sdata, type); |
| 1367 | } |
| 1368 | |
| 1369 | /* reset some values that shouldn't be kept across type changes */ |
| 1370 | sdata->drop_unencrypted = 0; |
| 1371 | if (type == NL80211_IFTYPE_STATION) |
| 1372 | sdata->u.mgd.use_4addr = false; |
| 1373 | |
| 1374 | return 0; |
| 1375 | } |
| 1376 | |
| 1377 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
| 1378 | u8 *perm_addr, enum nl80211_iftype type) |
| 1379 | { |
| 1380 | struct ieee80211_sub_if_data *sdata; |
| 1381 | u64 mask, start, addr, val, inc; |
| 1382 | u8 *m; |
| 1383 | u8 tmp_addr[ETH_ALEN]; |
| 1384 | int i; |
| 1385 | |
| 1386 | /* default ... something at least */ |
| 1387 | memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
| 1388 | |
| 1389 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && |
| 1390 | local->hw.wiphy->n_addresses <= 1) |
| 1391 | return; |
| 1392 | |
| 1393 | mutex_lock(&local->iflist_mtx); |
| 1394 | |
| 1395 | switch (type) { |
| 1396 | case NL80211_IFTYPE_MONITOR: |
| 1397 | /* doesn't matter */ |
| 1398 | break; |
| 1399 | case NL80211_IFTYPE_WDS: |
| 1400 | case NL80211_IFTYPE_AP_VLAN: |
| 1401 | /* match up with an AP interface */ |
| 1402 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1403 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
| 1404 | continue; |
| 1405 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
| 1406 | break; |
| 1407 | } |
| 1408 | /* keep default if no AP interface present */ |
| 1409 | break; |
| 1410 | case NL80211_IFTYPE_P2P_CLIENT: |
| 1411 | case NL80211_IFTYPE_P2P_GO: |
| 1412 | if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) { |
| 1413 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1414 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) |
| 1415 | continue; |
| 1416 | if (!ieee80211_sdata_running(sdata)) |
| 1417 | continue; |
| 1418 | memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
| 1419 | goto out_unlock; |
| 1420 | } |
| 1421 | } |
| 1422 | /* otherwise fall through */ |
| 1423 | default: |
| 1424 | /* assign a new address if possible -- try n_addresses first */ |
| 1425 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { |
| 1426 | bool used = false; |
| 1427 | |
| 1428 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1429 | if (memcmp(local->hw.wiphy->addresses[i].addr, |
| 1430 | sdata->vif.addr, ETH_ALEN) == 0) { |
| 1431 | used = true; |
| 1432 | break; |
| 1433 | } |
| 1434 | } |
| 1435 | |
| 1436 | if (!used) { |
| 1437 | memcpy(perm_addr, |
| 1438 | local->hw.wiphy->addresses[i].addr, |
| 1439 | ETH_ALEN); |
| 1440 | break; |
| 1441 | } |
| 1442 | } |
| 1443 | |
| 1444 | /* try mask if available */ |
| 1445 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) |
| 1446 | break; |
| 1447 | |
| 1448 | m = local->hw.wiphy->addr_mask; |
| 1449 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 1450 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 1451 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 1452 | |
| 1453 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { |
| 1454 | /* not a contiguous mask ... not handled now! */ |
| 1455 | pr_info("not contiguous\n"); |
| 1456 | break; |
| 1457 | } |
| 1458 | |
| 1459 | m = local->hw.wiphy->perm_addr; |
| 1460 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 1461 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 1462 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 1463 | |
| 1464 | inc = 1ULL<<__ffs64(mask); |
| 1465 | val = (start & mask); |
| 1466 | addr = (start & ~mask) | (val & mask); |
| 1467 | do { |
| 1468 | bool used = false; |
| 1469 | |
| 1470 | tmp_addr[5] = addr >> 0*8; |
| 1471 | tmp_addr[4] = addr >> 1*8; |
| 1472 | tmp_addr[3] = addr >> 2*8; |
| 1473 | tmp_addr[2] = addr >> 3*8; |
| 1474 | tmp_addr[1] = addr >> 4*8; |
| 1475 | tmp_addr[0] = addr >> 5*8; |
| 1476 | |
| 1477 | val += inc; |
| 1478 | |
| 1479 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1480 | if (memcmp(tmp_addr, sdata->vif.addr, |
| 1481 | ETH_ALEN) == 0) { |
| 1482 | used = true; |
| 1483 | break; |
| 1484 | } |
| 1485 | } |
| 1486 | |
| 1487 | if (!used) { |
| 1488 | memcpy(perm_addr, tmp_addr, ETH_ALEN); |
| 1489 | break; |
| 1490 | } |
| 1491 | addr = (start & ~mask) | (val & mask); |
| 1492 | } while (addr != start); |
| 1493 | |
| 1494 | break; |
| 1495 | } |
| 1496 | |
| 1497 | out_unlock: |
| 1498 | mutex_unlock(&local->iflist_mtx); |
| 1499 | } |
| 1500 | |
| 1501 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
| 1502 | struct wireless_dev **new_wdev, enum nl80211_iftype type, |
| 1503 | struct vif_params *params) |
| 1504 | { |
| 1505 | struct net_device *ndev = NULL; |
| 1506 | struct ieee80211_sub_if_data *sdata = NULL; |
| 1507 | int ret, i; |
| 1508 | int txqs = 1; |
| 1509 | |
| 1510 | ASSERT_RTNL(); |
| 1511 | |
| 1512 | if (type == NL80211_IFTYPE_P2P_DEVICE) { |
| 1513 | struct wireless_dev *wdev; |
| 1514 | |
| 1515 | sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, |
| 1516 | GFP_KERNEL); |
| 1517 | if (!sdata) |
| 1518 | return -ENOMEM; |
| 1519 | wdev = &sdata->wdev; |
| 1520 | |
| 1521 | sdata->dev = NULL; |
| 1522 | strlcpy(sdata->name, name, IFNAMSIZ); |
| 1523 | ieee80211_assign_perm_addr(local, wdev->address, type); |
| 1524 | memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); |
| 1525 | } else { |
| 1526 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
| 1527 | txqs = IEEE80211_NUM_ACS; |
| 1528 | |
| 1529 | ndev = alloc_netdev_mqs(sizeof(*sdata) + |
| 1530 | local->hw.vif_data_size, |
| 1531 | name, ieee80211_if_setup, txqs, 1); |
| 1532 | if (!ndev) |
| 1533 | return -ENOMEM; |
| 1534 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
| 1535 | |
| 1536 | ndev->needed_headroom = local->tx_headroom + |
| 1537 | 4*6 /* four MAC addresses */ |
| 1538 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ |
| 1539 | + 6 /* mesh */ |
| 1540 | + 8 /* rfc1042/bridge tunnel */ |
| 1541 | - ETH_HLEN /* ethernet hard_header_len */ |
| 1542 | + IEEE80211_ENCRYPT_HEADROOM; |
| 1543 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; |
| 1544 | |
| 1545 | ret = dev_alloc_name(ndev, ndev->name); |
| 1546 | if (ret < 0) { |
| 1547 | free_netdev(ndev); |
| 1548 | return ret; |
| 1549 | } |
| 1550 | |
| 1551 | ieee80211_assign_perm_addr(local, ndev->perm_addr, type); |
| 1552 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); |
| 1553 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
| 1554 | |
| 1555 | /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ |
| 1556 | sdata = netdev_priv(ndev); |
| 1557 | ndev->ieee80211_ptr = &sdata->wdev; |
| 1558 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
| 1559 | memcpy(sdata->name, ndev->name, IFNAMSIZ); |
| 1560 | |
| 1561 | sdata->dev = ndev; |
| 1562 | } |
| 1563 | |
| 1564 | /* initialise type-independent data */ |
| 1565 | sdata->wdev.wiphy = local->hw.wiphy; |
| 1566 | sdata->local = local; |
| 1567 | #ifdef CONFIG_INET |
| 1568 | sdata->arp_filter_state = true; |
| 1569 | #endif |
| 1570 | |
| 1571 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| 1572 | skb_queue_head_init(&sdata->fragments[i].skb_list); |
| 1573 | |
| 1574 | INIT_LIST_HEAD(&sdata->key_list); |
| 1575 | |
| 1576 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
| 1577 | struct ieee80211_supported_band *sband; |
| 1578 | sband = local->hw.wiphy->bands[i]; |
| 1579 | sdata->rc_rateidx_mask[i] = |
| 1580 | sband ? (1 << sband->n_bitrates) - 1 : 0; |
| 1581 | if (sband) |
| 1582 | memcpy(sdata->rc_rateidx_mcs_mask[i], |
| 1583 | sband->ht_cap.mcs.rx_mask, |
| 1584 | sizeof(sdata->rc_rateidx_mcs_mask[i])); |
| 1585 | else |
| 1586 | memset(sdata->rc_rateidx_mcs_mask[i], 0, |
| 1587 | sizeof(sdata->rc_rateidx_mcs_mask[i])); |
| 1588 | } |
| 1589 | |
| 1590 | ieee80211_set_default_queues(sdata); |
| 1591 | |
| 1592 | sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
| 1593 | sdata->user_power_level = local->user_power_level; |
| 1594 | |
| 1595 | /* setup type-dependent data */ |
| 1596 | ieee80211_setup_sdata(sdata, type); |
| 1597 | |
| 1598 | if (ndev) { |
| 1599 | if (params) { |
| 1600 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; |
| 1601 | if (type == NL80211_IFTYPE_STATION) |
| 1602 | sdata->u.mgd.use_4addr = params->use_4addr; |
| 1603 | } |
| 1604 | |
| 1605 | ndev->features |= local->hw.netdev_features; |
| 1606 | |
| 1607 | ret = register_netdevice(ndev); |
| 1608 | if (ret) { |
| 1609 | free_netdev(ndev); |
| 1610 | return ret; |
| 1611 | } |
| 1612 | } |
| 1613 | |
| 1614 | mutex_lock(&local->iflist_mtx); |
| 1615 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
| 1616 | mutex_unlock(&local->iflist_mtx); |
| 1617 | |
| 1618 | if (new_wdev) |
| 1619 | *new_wdev = &sdata->wdev; |
| 1620 | |
| 1621 | return 0; |
| 1622 | } |
| 1623 | |
| 1624 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
| 1625 | { |
| 1626 | ASSERT_RTNL(); |
| 1627 | |
| 1628 | mutex_lock(&sdata->local->iflist_mtx); |
| 1629 | list_del_rcu(&sdata->list); |
| 1630 | mutex_unlock(&sdata->local->iflist_mtx); |
| 1631 | |
| 1632 | synchronize_rcu(); |
| 1633 | |
| 1634 | if (sdata->dev) { |
| 1635 | unregister_netdevice(sdata->dev); |
| 1636 | } else { |
| 1637 | cfg80211_unregister_wdev(&sdata->wdev); |
| 1638 | kfree(sdata); |
| 1639 | } |
| 1640 | } |
| 1641 | |
| 1642 | void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) |
| 1643 | { |
| 1644 | if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) |
| 1645 | return; |
| 1646 | ieee80211_do_stop(sdata, true); |
| 1647 | ieee80211_teardown_sdata(sdata); |
| 1648 | } |
| 1649 | |
| 1650 | /* |
| 1651 | * Remove all interfaces, may only be called at hardware unregistration |
| 1652 | * time because it doesn't do RCU-safe list removals. |
| 1653 | */ |
| 1654 | void ieee80211_remove_interfaces(struct ieee80211_local *local) |
| 1655 | { |
| 1656 | struct ieee80211_sub_if_data *sdata, *tmp; |
| 1657 | LIST_HEAD(unreg_list); |
| 1658 | LIST_HEAD(wdev_list); |
| 1659 | |
| 1660 | ASSERT_RTNL(); |
| 1661 | |
| 1662 | mutex_lock(&local->iflist_mtx); |
| 1663 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
| 1664 | list_del(&sdata->list); |
| 1665 | |
| 1666 | if (sdata->dev) |
| 1667 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
| 1668 | else |
| 1669 | list_add(&sdata->list, &wdev_list); |
| 1670 | } |
| 1671 | mutex_unlock(&local->iflist_mtx); |
| 1672 | unregister_netdevice_many(&unreg_list); |
| 1673 | list_del(&unreg_list); |
| 1674 | |
| 1675 | list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { |
| 1676 | list_del(&sdata->list); |
| 1677 | cfg80211_unregister_wdev(&sdata->wdev); |
| 1678 | kfree(sdata); |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | static int netdev_notify(struct notifier_block *nb, |
| 1683 | unsigned long state, |
| 1684 | void *ndev) |
| 1685 | { |
| 1686 | struct net_device *dev = ndev; |
| 1687 | struct ieee80211_sub_if_data *sdata; |
| 1688 | |
| 1689 | if (state != NETDEV_CHANGENAME) |
| 1690 | return 0; |
| 1691 | |
| 1692 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) |
| 1693 | return 0; |
| 1694 | |
| 1695 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) |
| 1696 | return 0; |
| 1697 | |
| 1698 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1699 | |
| 1700 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
| 1701 | |
| 1702 | ieee80211_debugfs_rename_netdev(sdata); |
| 1703 | return 0; |
| 1704 | } |
| 1705 | |
| 1706 | static struct notifier_block mac80211_netdev_notifier = { |
| 1707 | .notifier_call = netdev_notify, |
| 1708 | }; |
| 1709 | |
| 1710 | int ieee80211_iface_init(void) |
| 1711 | { |
| 1712 | return register_netdevice_notifier(&mac80211_netdev_notifier); |
| 1713 | } |
| 1714 | |
| 1715 | void ieee80211_iface_exit(void) |
| 1716 | { |
| 1717 | unregister_netdevice_notifier(&mac80211_netdev_notifier); |
| 1718 | } |