| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * This is the linux wireless configuration interface. |
| 4 | * |
| 5 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
| 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
| 7 | * Copyright 2015-2017 Intel Deutschland GmbH |
| 8 | * Copyright (C) 2018-2024 Intel Corporation |
| 9 | */ |
| 10 | |
| 11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 12 | |
| 13 | #include <linux/if.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/list.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/nl80211.h> |
| 19 | #include <linux/debugfs.h> |
| 20 | #include <linux/notifier.h> |
| 21 | #include <linux/device.h> |
| 22 | #include <linux/etherdevice.h> |
| 23 | #include <linux/rtnetlink.h> |
| 24 | #include <linux/sched.h> |
| 25 | #include <net/genetlink.h> |
| 26 | #include <net/cfg80211.h> |
| 27 | #include "nl80211.h" |
| 28 | #include "core.h" |
| 29 | #include "sysfs.h" |
| 30 | #include "debugfs.h" |
| 31 | #include "wext-compat.h" |
| 32 | #include "rdev-ops.h" |
| 33 | |
| 34 | /* name for sysfs, %d is appended */ |
| 35 | #define PHY_NAME "phy" |
| 36 | |
| 37 | MODULE_AUTHOR("Johannes Berg"); |
| 38 | MODULE_LICENSE("GPL"); |
| 39 | MODULE_DESCRIPTION("wireless configuration support"); |
| 40 | MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); |
| 41 | |
| 42 | /* RCU-protected (and RTNL for writers) */ |
| 43 | LIST_HEAD(cfg80211_rdev_list); |
| 44 | int cfg80211_rdev_list_generation; |
| 45 | |
| 46 | /* for debugfs */ |
| 47 | static struct dentry *ieee80211_debugfs_dir; |
| 48 | |
| 49 | /* for the cleanup, scan and event works */ |
| 50 | struct workqueue_struct *cfg80211_wq; |
| 51 | |
| 52 | static bool cfg80211_disable_40mhz_24ghz; |
| 53 | module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); |
| 54 | MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, |
| 55 | "Disable 40MHz support in the 2.4GHz band"); |
| 56 | |
| 57 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
| 58 | { |
| 59 | struct cfg80211_registered_device *result = NULL, *rdev; |
| 60 | |
| 61 | ASSERT_RTNL(); |
| 62 | |
| 63 | for_each_rdev(rdev) { |
| 64 | if (rdev->wiphy_idx == wiphy_idx) { |
| 65 | result = rdev; |
| 66 | break; |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | return result; |
| 71 | } |
| 72 | |
| 73 | int get_wiphy_idx(struct wiphy *wiphy) |
| 74 | { |
| 75 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 76 | |
| 77 | return rdev->wiphy_idx; |
| 78 | } |
| 79 | |
| 80 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
| 81 | { |
| 82 | struct cfg80211_registered_device *rdev; |
| 83 | |
| 84 | ASSERT_RTNL(); |
| 85 | |
| 86 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
| 87 | if (!rdev) |
| 88 | return NULL; |
| 89 | return &rdev->wiphy; |
| 90 | } |
| 91 | |
| 92 | static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, |
| 93 | const char *newname) |
| 94 | { |
| 95 | struct cfg80211_registered_device *rdev2; |
| 96 | int wiphy_idx, taken = -1, digits; |
| 97 | |
| 98 | ASSERT_RTNL(); |
| 99 | |
| 100 | if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN) |
| 101 | return -EINVAL; |
| 102 | |
| 103 | /* prohibit calling the thing phy%d when %d is not its number */ |
| 104 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); |
| 105 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { |
| 106 | /* count number of places needed to print wiphy_idx */ |
| 107 | digits = 1; |
| 108 | while (wiphy_idx /= 10) |
| 109 | digits++; |
| 110 | /* |
| 111 | * deny the name if it is phy<idx> where <idx> is printed |
| 112 | * without leading zeroes. taken == strlen(newname) here |
| 113 | */ |
| 114 | if (taken == strlen(PHY_NAME) + digits) |
| 115 | return -EINVAL; |
| 116 | } |
| 117 | |
| 118 | /* Ensure another device does not already have this name. */ |
| 119 | for_each_rdev(rdev2) |
| 120 | if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) |
| 121 | return -EINVAL; |
| 122 | |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
| 127 | char *newname) |
| 128 | { |
| 129 | int result; |
| 130 | |
| 131 | ASSERT_RTNL(); |
| 132 | lockdep_assert_wiphy(&rdev->wiphy); |
| 133 | |
| 134 | /* Ignore nop renames */ |
| 135 | if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) |
| 136 | return 0; |
| 137 | |
| 138 | result = cfg80211_dev_check_name(rdev, newname); |
| 139 | if (result < 0) |
| 140 | return result; |
| 141 | |
| 142 | result = device_rename(&rdev->wiphy.dev, newname); |
| 143 | if (result) |
| 144 | return result; |
| 145 | |
| 146 | if (!IS_ERR_OR_NULL(rdev->wiphy.debugfsdir)) |
| 147 | debugfs_rename(rdev->wiphy.debugfsdir->d_parent, |
| 148 | rdev->wiphy.debugfsdir, |
| 149 | rdev->wiphy.debugfsdir->d_parent, newname); |
| 150 | |
| 151 | nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
| 157 | struct net *net) |
| 158 | { |
| 159 | struct wireless_dev *wdev; |
| 160 | int err = 0; |
| 161 | |
| 162 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
| 163 | return -EOPNOTSUPP; |
| 164 | |
| 165 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
| 166 | if (!wdev->netdev) |
| 167 | continue; |
| 168 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
| 169 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); |
| 170 | if (err) |
| 171 | break; |
| 172 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; |
| 173 | } |
| 174 | |
| 175 | if (err) { |
| 176 | /* failed -- clean up to old netns */ |
| 177 | net = wiphy_net(&rdev->wiphy); |
| 178 | |
| 179 | list_for_each_entry_continue_reverse(wdev, |
| 180 | &rdev->wiphy.wdev_list, |
| 181 | list) { |
| 182 | if (!wdev->netdev) |
| 183 | continue; |
| 184 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
| 185 | err = dev_change_net_namespace(wdev->netdev, net, |
| 186 | "wlan%d"); |
| 187 | WARN_ON(err); |
| 188 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; |
| 189 | } |
| 190 | |
| 191 | return err; |
| 192 | } |
| 193 | |
| 194 | wiphy_lock(&rdev->wiphy); |
| 195 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
| 196 | if (!wdev->netdev) |
| 197 | continue; |
| 198 | nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); |
| 199 | } |
| 200 | |
| 201 | nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); |
| 202 | |
| 203 | wiphy_net_set(&rdev->wiphy, net); |
| 204 | |
| 205 | err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
| 206 | WARN_ON(err); |
| 207 | |
| 208 | nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); |
| 209 | |
| 210 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
| 211 | if (!wdev->netdev) |
| 212 | continue; |
| 213 | nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); |
| 214 | } |
| 215 | wiphy_unlock(&rdev->wiphy); |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
| 221 | { |
| 222 | struct cfg80211_registered_device *rdev = data; |
| 223 | |
| 224 | wiphy_lock(&rdev->wiphy); |
| 225 | rdev_rfkill_poll(rdev); |
| 226 | wiphy_unlock(&rdev->wiphy); |
| 227 | } |
| 228 | |
| 229 | void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, |
| 230 | struct wireless_dev *wdev) |
| 231 | { |
| 232 | lockdep_assert_held(&rdev->wiphy.mtx); |
| 233 | |
| 234 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) |
| 235 | return; |
| 236 | |
| 237 | if (!wdev_running(wdev)) |
| 238 | return; |
| 239 | |
| 240 | rdev_stop_p2p_device(rdev, wdev); |
| 241 | wdev->is_running = false; |
| 242 | |
| 243 | rdev->opencount--; |
| 244 | |
| 245 | if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
| 246 | if (WARN_ON(!rdev->scan_req->notified && |
| 247 | (!rdev->int_scan_req || |
| 248 | !rdev->int_scan_req->notified))) |
| 249 | rdev->scan_req->info.aborted = true; |
| 250 | ___cfg80211_scan_done(rdev, false); |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, |
| 255 | struct wireless_dev *wdev) |
| 256 | { |
| 257 | lockdep_assert_held(&rdev->wiphy.mtx); |
| 258 | |
| 259 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) |
| 260 | return; |
| 261 | |
| 262 | if (!wdev_running(wdev)) |
| 263 | return; |
| 264 | |
| 265 | rdev_stop_nan(rdev, wdev); |
| 266 | wdev->is_running = false; |
| 267 | |
| 268 | rdev->opencount--; |
| 269 | } |
| 270 | |
| 271 | void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) |
| 272 | { |
| 273 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 274 | struct wireless_dev *wdev; |
| 275 | |
| 276 | ASSERT_RTNL(); |
| 277 | |
| 278 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
| 279 | if (wdev->netdev) { |
| 280 | dev_close(wdev->netdev); |
| 281 | continue; |
| 282 | } |
| 283 | |
| 284 | /* otherwise, check iftype */ |
| 285 | |
| 286 | wiphy_lock(wiphy); |
| 287 | |
| 288 | switch (wdev->iftype) { |
| 289 | case NL80211_IFTYPE_P2P_DEVICE: |
| 290 | cfg80211_stop_p2p_device(rdev, wdev); |
| 291 | break; |
| 292 | case NL80211_IFTYPE_NAN: |
| 293 | cfg80211_stop_nan(rdev, wdev); |
| 294 | break; |
| 295 | default: |
| 296 | break; |
| 297 | } |
| 298 | |
| 299 | wiphy_unlock(wiphy); |
| 300 | } |
| 301 | } |
| 302 | EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); |
| 303 | |
| 304 | static int cfg80211_rfkill_set_block(void *data, bool blocked) |
| 305 | { |
| 306 | struct cfg80211_registered_device *rdev = data; |
| 307 | |
| 308 | if (!blocked) |
| 309 | return 0; |
| 310 | |
| 311 | rtnl_lock(); |
| 312 | cfg80211_shutdown_all_interfaces(&rdev->wiphy); |
| 313 | rtnl_unlock(); |
| 314 | |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | static void cfg80211_rfkill_block_work(struct work_struct *work) |
| 319 | { |
| 320 | struct cfg80211_registered_device *rdev; |
| 321 | |
| 322 | rdev = container_of(work, struct cfg80211_registered_device, |
| 323 | rfkill_block); |
| 324 | cfg80211_rfkill_set_block(rdev, true); |
| 325 | } |
| 326 | |
| 327 | static void cfg80211_event_work(struct work_struct *work) |
| 328 | { |
| 329 | struct cfg80211_registered_device *rdev; |
| 330 | |
| 331 | rdev = container_of(work, struct cfg80211_registered_device, |
| 332 | event_work); |
| 333 | |
| 334 | wiphy_lock(&rdev->wiphy); |
| 335 | cfg80211_process_rdev_events(rdev); |
| 336 | wiphy_unlock(&rdev->wiphy); |
| 337 | } |
| 338 | |
| 339 | void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) |
| 340 | { |
| 341 | struct wireless_dev *wdev, *tmp; |
| 342 | |
| 343 | ASSERT_RTNL(); |
| 344 | |
| 345 | list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { |
| 346 | if (wdev->nl_owner_dead) { |
| 347 | if (wdev->netdev) |
| 348 | dev_close(wdev->netdev); |
| 349 | |
| 350 | wiphy_lock(&rdev->wiphy); |
| 351 | cfg80211_leave(rdev, wdev); |
| 352 | cfg80211_remove_virtual_intf(rdev, wdev); |
| 353 | wiphy_unlock(&rdev->wiphy); |
| 354 | } |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | static void cfg80211_destroy_iface_wk(struct work_struct *work) |
| 359 | { |
| 360 | struct cfg80211_registered_device *rdev; |
| 361 | |
| 362 | rdev = container_of(work, struct cfg80211_registered_device, |
| 363 | destroy_work); |
| 364 | |
| 365 | rtnl_lock(); |
| 366 | cfg80211_destroy_ifaces(rdev); |
| 367 | rtnl_unlock(); |
| 368 | } |
| 369 | |
| 370 | static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy, |
| 371 | struct wiphy_work *work) |
| 372 | { |
| 373 | struct cfg80211_registered_device *rdev; |
| 374 | struct cfg80211_sched_scan_request *req, *tmp; |
| 375 | |
| 376 | rdev = container_of(work, struct cfg80211_registered_device, |
| 377 | sched_scan_stop_wk); |
| 378 | |
| 379 | list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { |
| 380 | if (req->nl_owner_dead) |
| 381 | cfg80211_stop_sched_scan_req(rdev, req, false); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) |
| 386 | { |
| 387 | struct cfg80211_registered_device *rdev; |
| 388 | |
| 389 | rdev = container_of(work, struct cfg80211_registered_device, |
| 390 | propagate_radar_detect_wk); |
| 391 | |
| 392 | rtnl_lock(); |
| 393 | |
| 394 | regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, |
| 395 | NL80211_DFS_UNAVAILABLE, |
| 396 | NL80211_RADAR_DETECTED); |
| 397 | |
| 398 | rtnl_unlock(); |
| 399 | } |
| 400 | |
| 401 | static void cfg80211_propagate_cac_done_wk(struct work_struct *work) |
| 402 | { |
| 403 | struct cfg80211_registered_device *rdev; |
| 404 | |
| 405 | rdev = container_of(work, struct cfg80211_registered_device, |
| 406 | propagate_cac_done_wk); |
| 407 | |
| 408 | rtnl_lock(); |
| 409 | |
| 410 | regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, |
| 411 | NL80211_DFS_AVAILABLE, |
| 412 | NL80211_RADAR_CAC_FINISHED); |
| 413 | |
| 414 | rtnl_unlock(); |
| 415 | } |
| 416 | |
| 417 | static void cfg80211_wiphy_work(struct work_struct *work) |
| 418 | { |
| 419 | struct cfg80211_registered_device *rdev; |
| 420 | struct wiphy_work *wk; |
| 421 | |
| 422 | rdev = container_of(work, struct cfg80211_registered_device, wiphy_work); |
| 423 | |
| 424 | wiphy_lock(&rdev->wiphy); |
| 425 | if (rdev->suspended) |
| 426 | goto out; |
| 427 | |
| 428 | spin_lock_irq(&rdev->wiphy_work_lock); |
| 429 | wk = list_first_entry_or_null(&rdev->wiphy_work_list, |
| 430 | struct wiphy_work, entry); |
| 431 | if (wk) { |
| 432 | list_del_init(&wk->entry); |
| 433 | if (!list_empty(&rdev->wiphy_work_list)) |
| 434 | queue_work(system_unbound_wq, work); |
| 435 | spin_unlock_irq(&rdev->wiphy_work_lock); |
| 436 | |
| 437 | wk->func(&rdev->wiphy, wk); |
| 438 | } else { |
| 439 | spin_unlock_irq(&rdev->wiphy_work_lock); |
| 440 | } |
| 441 | out: |
| 442 | wiphy_unlock(&rdev->wiphy); |
| 443 | } |
| 444 | |
| 445 | /* exported functions */ |
| 446 | |
| 447 | struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, |
| 448 | const char *requested_name) |
| 449 | { |
| 450 | static atomic_t wiphy_counter = ATOMIC_INIT(0); |
| 451 | |
| 452 | struct cfg80211_registered_device *rdev; |
| 453 | int alloc_size; |
| 454 | |
| 455 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
| 456 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); |
| 457 | WARN_ON(ops->connect && !ops->disconnect); |
| 458 | WARN_ON(ops->join_ibss && !ops->leave_ibss); |
| 459 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); |
| 460 | WARN_ON(ops->add_station && !ops->del_station); |
| 461 | WARN_ON(ops->add_mpath && !ops->del_mpath); |
| 462 | WARN_ON(ops->join_mesh && !ops->leave_mesh); |
| 463 | WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); |
| 464 | WARN_ON(ops->start_ap && !ops->stop_ap); |
| 465 | WARN_ON(ops->join_ocb && !ops->leave_ocb); |
| 466 | WARN_ON(ops->suspend && !ops->resume); |
| 467 | WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); |
| 468 | WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); |
| 469 | WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); |
| 470 | WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); |
| 471 | |
| 472 | alloc_size = sizeof(*rdev) + sizeof_priv; |
| 473 | |
| 474 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
| 475 | if (!rdev) |
| 476 | return NULL; |
| 477 | |
| 478 | rdev->ops = ops; |
| 479 | |
| 480 | rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); |
| 481 | |
| 482 | if (unlikely(rdev->wiphy_idx < 0)) { |
| 483 | /* ugh, wrapped! */ |
| 484 | atomic_dec(&wiphy_counter); |
| 485 | kfree(rdev); |
| 486 | return NULL; |
| 487 | } |
| 488 | |
| 489 | /* atomic_inc_return makes it start at 1, make it start at 0 */ |
| 490 | rdev->wiphy_idx--; |
| 491 | |
| 492 | /* give it a proper name */ |
| 493 | if (requested_name && requested_name[0]) { |
| 494 | int rv; |
| 495 | |
| 496 | rtnl_lock(); |
| 497 | rv = cfg80211_dev_check_name(rdev, requested_name); |
| 498 | |
| 499 | if (rv < 0) { |
| 500 | rtnl_unlock(); |
| 501 | goto use_default_name; |
| 502 | } |
| 503 | |
| 504 | rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); |
| 505 | rtnl_unlock(); |
| 506 | if (rv) |
| 507 | goto use_default_name; |
| 508 | } else { |
| 509 | int rv; |
| 510 | |
| 511 | use_default_name: |
| 512 | /* NOTE: This is *probably* safe w/out holding rtnl because of |
| 513 | * the restrictions on phy names. Probably this call could |
| 514 | * fail if some other part of the kernel (re)named a device |
| 515 | * phyX. But, might should add some locking and check return |
| 516 | * value, and use a different name if this one exists? |
| 517 | */ |
| 518 | rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); |
| 519 | if (rv < 0) { |
| 520 | kfree(rdev); |
| 521 | return NULL; |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | mutex_init(&rdev->wiphy.mtx); |
| 526 | INIT_LIST_HEAD(&rdev->wiphy.wdev_list); |
| 527 | INIT_LIST_HEAD(&rdev->beacon_registrations); |
| 528 | spin_lock_init(&rdev->beacon_registrations_lock); |
| 529 | spin_lock_init(&rdev->bss_lock); |
| 530 | INIT_LIST_HEAD(&rdev->bss_list); |
| 531 | INIT_LIST_HEAD(&rdev->sched_scan_req_list); |
| 532 | wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done); |
| 533 | INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, |
| 534 | cfg80211_dfs_channels_update_work); |
| 535 | #ifdef CONFIG_CFG80211_WEXT |
| 536 | rdev->wiphy.wext = &cfg80211_wext_handler; |
| 537 | #endif |
| 538 | |
| 539 | device_initialize(&rdev->wiphy.dev); |
| 540 | rdev->wiphy.dev.class = &ieee80211_class; |
| 541 | rdev->wiphy.dev.platform_data = rdev; |
| 542 | device_enable_async_suspend(&rdev->wiphy.dev); |
| 543 | |
| 544 | INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); |
| 545 | wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); |
| 546 | INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); |
| 547 | INIT_WORK(&rdev->propagate_radar_detect_wk, |
| 548 | cfg80211_propagate_radar_detect_wk); |
| 549 | INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); |
| 550 | INIT_WORK(&rdev->mgmt_registrations_update_wk, |
| 551 | cfg80211_mgmt_registrations_update_wk); |
| 552 | spin_lock_init(&rdev->mgmt_registrations_lock); |
| 553 | |
| 554 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
| 555 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; |
| 556 | #endif |
| 557 | |
| 558 | wiphy_net_set(&rdev->wiphy, &init_net); |
| 559 | |
| 560 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
| 561 | rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), |
| 562 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, |
| 563 | &rdev->rfkill_ops, rdev); |
| 564 | |
| 565 | if (!rdev->wiphy.rfkill) { |
| 566 | wiphy_free(&rdev->wiphy); |
| 567 | return NULL; |
| 568 | } |
| 569 | |
| 570 | INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work); |
| 571 | INIT_LIST_HEAD(&rdev->wiphy_work_list); |
| 572 | spin_lock_init(&rdev->wiphy_work_lock); |
| 573 | INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); |
| 574 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); |
| 575 | INIT_WORK(&rdev->event_work, cfg80211_event_work); |
| 576 | INIT_WORK(&rdev->background_cac_abort_wk, |
| 577 | cfg80211_background_cac_abort_wk); |
| 578 | INIT_DELAYED_WORK(&rdev->background_cac_done_wk, |
| 579 | cfg80211_background_cac_done_wk); |
| 580 | |
| 581 | init_waitqueue_head(&rdev->dev_wait); |
| 582 | |
| 583 | /* |
| 584 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. |
| 585 | * Fragmentation and RTS threshold are disabled by default with the |
| 586 | * special -1 value. |
| 587 | */ |
| 588 | rdev->wiphy.retry_short = 7; |
| 589 | rdev->wiphy.retry_long = 4; |
| 590 | rdev->wiphy.frag_threshold = (u32) -1; |
| 591 | rdev->wiphy.rts_threshold = (u32) -1; |
| 592 | rdev->wiphy.coverage_class = 0; |
| 593 | |
| 594 | rdev->wiphy.max_num_csa_counters = 1; |
| 595 | |
| 596 | rdev->wiphy.max_sched_scan_plans = 1; |
| 597 | rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; |
| 598 | |
| 599 | return &rdev->wiphy; |
| 600 | } |
| 601 | EXPORT_SYMBOL(wiphy_new_nm); |
| 602 | |
| 603 | static int wiphy_verify_combinations(struct wiphy *wiphy) |
| 604 | { |
| 605 | const struct ieee80211_iface_combination *c; |
| 606 | int i, j; |
| 607 | |
| 608 | for (i = 0; i < wiphy->n_iface_combinations; i++) { |
| 609 | u32 cnt = 0; |
| 610 | u16 all_iftypes = 0; |
| 611 | |
| 612 | c = &wiphy->iface_combinations[i]; |
| 613 | |
| 614 | /* |
| 615 | * Combinations with just one interface aren't real, |
| 616 | * however we make an exception for DFS. |
| 617 | */ |
| 618 | if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) |
| 619 | return -EINVAL; |
| 620 | |
| 621 | /* Need at least one channel */ |
| 622 | if (WARN_ON(!c->num_different_channels)) |
| 623 | return -EINVAL; |
| 624 | |
| 625 | /* DFS only works on one channel. */ |
| 626 | if (WARN_ON(c->radar_detect_widths && |
| 627 | (c->num_different_channels > 1))) |
| 628 | return -EINVAL; |
| 629 | |
| 630 | if (WARN_ON(!c->n_limits)) |
| 631 | return -EINVAL; |
| 632 | |
| 633 | for (j = 0; j < c->n_limits; j++) { |
| 634 | u16 types = c->limits[j].types; |
| 635 | |
| 636 | /* interface types shouldn't overlap */ |
| 637 | if (WARN_ON(types & all_iftypes)) |
| 638 | return -EINVAL; |
| 639 | all_iftypes |= types; |
| 640 | |
| 641 | if (WARN_ON(!c->limits[j].max)) |
| 642 | return -EINVAL; |
| 643 | |
| 644 | /* Shouldn't list software iftypes in combinations! */ |
| 645 | if (WARN_ON(wiphy->software_iftypes & types)) |
| 646 | return -EINVAL; |
| 647 | |
| 648 | /* Only a single P2P_DEVICE can be allowed */ |
| 649 | if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && |
| 650 | c->limits[j].max > 1)) |
| 651 | return -EINVAL; |
| 652 | |
| 653 | /* Only a single NAN can be allowed */ |
| 654 | if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && |
| 655 | c->limits[j].max > 1)) |
| 656 | return -EINVAL; |
| 657 | |
| 658 | /* |
| 659 | * This isn't well-defined right now. If you have an |
| 660 | * IBSS interface, then its beacon interval may change |
| 661 | * by joining other networks, and nothing prevents it |
| 662 | * from doing that. |
| 663 | * So technically we probably shouldn't even allow AP |
| 664 | * and IBSS in the same interface, but it seems that |
| 665 | * some drivers support that, possibly only with fixed |
| 666 | * beacon intervals for IBSS. |
| 667 | */ |
| 668 | if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && |
| 669 | c->beacon_int_min_gcd)) { |
| 670 | return -EINVAL; |
| 671 | } |
| 672 | |
| 673 | cnt += c->limits[j].max; |
| 674 | /* |
| 675 | * Don't advertise an unsupported type |
| 676 | * in a combination. |
| 677 | */ |
| 678 | if (WARN_ON((wiphy->interface_modes & types) != types)) |
| 679 | return -EINVAL; |
| 680 | } |
| 681 | |
| 682 | if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) |
| 683 | return -EINVAL; |
| 684 | |
| 685 | /* You can't even choose that many! */ |
| 686 | if (WARN_ON(cnt < c->max_interfaces)) |
| 687 | return -EINVAL; |
| 688 | } |
| 689 | |
| 690 | return 0; |
| 691 | } |
| 692 | |
| 693 | int wiphy_register(struct wiphy *wiphy) |
| 694 | { |
| 695 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 696 | int res; |
| 697 | enum nl80211_band band; |
| 698 | struct ieee80211_supported_band *sband; |
| 699 | bool have_band = false; |
| 700 | int i; |
| 701 | u16 ifmodes = wiphy->interface_modes; |
| 702 | |
| 703 | #ifdef CONFIG_PM |
| 704 | if (WARN_ON(wiphy->wowlan && |
| 705 | (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && |
| 706 | !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) |
| 707 | return -EINVAL; |
| 708 | if (WARN_ON(wiphy->wowlan && |
| 709 | !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && |
| 710 | !wiphy->wowlan->tcp)) |
| 711 | return -EINVAL; |
| 712 | #endif |
| 713 | if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && |
| 714 | (!rdev->ops->tdls_channel_switch || |
| 715 | !rdev->ops->tdls_cancel_channel_switch))) |
| 716 | return -EINVAL; |
| 717 | |
| 718 | if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && |
| 719 | (!rdev->ops->start_nan || !rdev->ops->stop_nan || |
| 720 | !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || |
| 721 | !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) |
| 722 | return -EINVAL; |
| 723 | |
| 724 | if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) |
| 725 | return -EINVAL; |
| 726 | |
| 727 | if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) |
| 728 | return -EINVAL; |
| 729 | |
| 730 | if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { |
| 731 | if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && |
| 732 | !wiphy->pmsr_capa->ftm.non_asap)) |
| 733 | return -EINVAL; |
| 734 | if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || |
| 735 | !wiphy->pmsr_capa->ftm.bandwidths)) |
| 736 | return -EINVAL; |
| 737 | if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & |
| 738 | ~(BIT(NL80211_PREAMBLE_LEGACY) | |
| 739 | BIT(NL80211_PREAMBLE_HT) | |
| 740 | BIT(NL80211_PREAMBLE_VHT) | |
| 741 | BIT(NL80211_PREAMBLE_HE) | |
| 742 | BIT(NL80211_PREAMBLE_DMG)))) |
| 743 | return -EINVAL; |
| 744 | if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || |
| 745 | wiphy->pmsr_capa->ftm.non_trigger_based) && |
| 746 | !(wiphy->pmsr_capa->ftm.preambles & |
| 747 | BIT(NL80211_PREAMBLE_HE)))) |
| 748 | return -EINVAL; |
| 749 | if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & |
| 750 | ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | |
| 751 | BIT(NL80211_CHAN_WIDTH_20) | |
| 752 | BIT(NL80211_CHAN_WIDTH_40) | |
| 753 | BIT(NL80211_CHAN_WIDTH_80) | |
| 754 | BIT(NL80211_CHAN_WIDTH_80P80) | |
| 755 | BIT(NL80211_CHAN_WIDTH_160) | |
| 756 | BIT(NL80211_CHAN_WIDTH_5) | |
| 757 | BIT(NL80211_CHAN_WIDTH_10)))) |
| 758 | return -EINVAL; |
| 759 | } |
| 760 | |
| 761 | if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && |
| 762 | (wiphy->regulatory_flags & |
| 763 | (REGULATORY_CUSTOM_REG | |
| 764 | REGULATORY_STRICT_REG | |
| 765 | REGULATORY_COUNTRY_IE_FOLLOW_POWER | |
| 766 | REGULATORY_COUNTRY_IE_IGNORE)))) |
| 767 | return -EINVAL; |
| 768 | |
| 769 | if (WARN_ON(wiphy->coalesce && |
| 770 | (!wiphy->coalesce->n_rules || |
| 771 | !wiphy->coalesce->n_patterns) && |
| 772 | (!wiphy->coalesce->pattern_min_len || |
| 773 | wiphy->coalesce->pattern_min_len > |
| 774 | wiphy->coalesce->pattern_max_len))) |
| 775 | return -EINVAL; |
| 776 | |
| 777 | if (WARN_ON(wiphy->ap_sme_capa && |
| 778 | !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) |
| 779 | return -EINVAL; |
| 780 | |
| 781 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
| 782 | return -EINVAL; |
| 783 | |
| 784 | if (WARN_ON(wiphy->addresses && |
| 785 | !is_zero_ether_addr(wiphy->perm_addr) && |
| 786 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, |
| 787 | ETH_ALEN))) |
| 788 | return -EINVAL; |
| 789 | |
| 790 | if (WARN_ON(wiphy->max_acl_mac_addrs && |
| 791 | (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || |
| 792 | !rdev->ops->set_mac_acl))) |
| 793 | return -EINVAL; |
| 794 | |
| 795 | /* assure only valid behaviours are flagged by driver |
| 796 | * hence subtract 2 as bit 0 is invalid. |
| 797 | */ |
| 798 | if (WARN_ON(wiphy->bss_select_support && |
| 799 | (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) |
| 800 | return -EINVAL; |
| 801 | |
| 802 | if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, |
| 803 | NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && |
| 804 | (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) |
| 805 | return -EINVAL; |
| 806 | |
| 807 | if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && |
| 808 | rdev->ops->update_connect_params)) |
| 809 | return -EINVAL; |
| 810 | |
| 811 | if (wiphy->addresses) |
| 812 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); |
| 813 | |
| 814 | /* sanity check ifmodes */ |
| 815 | WARN_ON(!ifmodes); |
| 816 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
| 817 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
| 818 | wiphy->interface_modes = ifmodes; |
| 819 | |
| 820 | res = wiphy_verify_combinations(wiphy); |
| 821 | if (res) |
| 822 | return res; |
| 823 | |
| 824 | /* sanity check supported bands/channels */ |
| 825 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
| 826 | const struct ieee80211_sband_iftype_data *iftd; |
| 827 | u16 types = 0; |
| 828 | bool have_he = false; |
| 829 | |
| 830 | sband = wiphy->bands[band]; |
| 831 | if (!sband) |
| 832 | continue; |
| 833 | |
| 834 | sband->band = band; |
| 835 | if (WARN_ON(!sband->n_channels)) |
| 836 | return -EINVAL; |
| 837 | /* |
| 838 | * on 60GHz or sub-1Ghz band, there are no legacy rates, so |
| 839 | * n_bitrates is 0 |
| 840 | */ |
| 841 | if (WARN_ON((band != NL80211_BAND_60GHZ && |
| 842 | band != NL80211_BAND_S1GHZ) && |
| 843 | !sband->n_bitrates)) |
| 844 | return -EINVAL; |
| 845 | |
| 846 | if (WARN_ON(band == NL80211_BAND_6GHZ && |
| 847 | (sband->ht_cap.ht_supported || |
| 848 | sband->vht_cap.vht_supported))) |
| 849 | return -EINVAL; |
| 850 | |
| 851 | /* |
| 852 | * Since cfg80211_disable_40mhz_24ghz is global, we can |
| 853 | * modify the sband's ht data even if the driver uses a |
| 854 | * global structure for that. |
| 855 | */ |
| 856 | if (cfg80211_disable_40mhz_24ghz && |
| 857 | band == NL80211_BAND_2GHZ && |
| 858 | sband->ht_cap.ht_supported) { |
| 859 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| 860 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; |
| 861 | } |
| 862 | |
| 863 | /* |
| 864 | * Since we use a u32 for rate bitmaps in |
| 865 | * ieee80211_get_response_rate, we cannot |
| 866 | * have more than 32 legacy rates. |
| 867 | */ |
| 868 | if (WARN_ON(sband->n_bitrates > 32)) |
| 869 | return -EINVAL; |
| 870 | |
| 871 | for (i = 0; i < sband->n_channels; i++) { |
| 872 | sband->channels[i].orig_flags = |
| 873 | sband->channels[i].flags; |
| 874 | sband->channels[i].orig_mag = INT_MAX; |
| 875 | sband->channels[i].orig_mpwr = |
| 876 | sband->channels[i].max_power; |
| 877 | sband->channels[i].band = band; |
| 878 | |
| 879 | if (WARN_ON(sband->channels[i].freq_offset >= 1000)) |
| 880 | return -EINVAL; |
| 881 | } |
| 882 | |
| 883 | for_each_sband_iftype_data(sband, i, iftd) { |
| 884 | bool has_ap, has_non_ap; |
| 885 | u32 ap_bits = BIT(NL80211_IFTYPE_AP) | |
| 886 | BIT(NL80211_IFTYPE_P2P_GO); |
| 887 | |
| 888 | if (WARN_ON(!iftd->types_mask)) |
| 889 | return -EINVAL; |
| 890 | if (WARN_ON(types & iftd->types_mask)) |
| 891 | return -EINVAL; |
| 892 | |
| 893 | /* at least one piece of information must be present */ |
| 894 | if (WARN_ON(!iftd->he_cap.has_he)) |
| 895 | return -EINVAL; |
| 896 | |
| 897 | types |= iftd->types_mask; |
| 898 | |
| 899 | if (i == 0) |
| 900 | have_he = iftd->he_cap.has_he; |
| 901 | else |
| 902 | have_he = have_he && |
| 903 | iftd->he_cap.has_he; |
| 904 | |
| 905 | has_ap = iftd->types_mask & ap_bits; |
| 906 | has_non_ap = iftd->types_mask & ~ap_bits; |
| 907 | |
| 908 | /* |
| 909 | * For EHT 20 MHz STA, the capabilities format differs |
| 910 | * but to simplify, don't check 20 MHz but rather check |
| 911 | * only if AP and non-AP were mentioned at the same time, |
| 912 | * reject if so. |
| 913 | */ |
| 914 | if (WARN_ON(iftd->eht_cap.has_eht && |
| 915 | has_ap && has_non_ap)) |
| 916 | return -EINVAL; |
| 917 | } |
| 918 | |
| 919 | if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ)) |
| 920 | return -EINVAL; |
| 921 | |
| 922 | have_band = true; |
| 923 | } |
| 924 | |
| 925 | if (!have_band) { |
| 926 | WARN_ON(1); |
| 927 | return -EINVAL; |
| 928 | } |
| 929 | |
| 930 | for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { |
| 931 | /* |
| 932 | * Validate we have a policy (can be explicitly set to |
| 933 | * VENDOR_CMD_RAW_DATA which is non-NULL) and also that |
| 934 | * we have at least one of doit/dumpit. |
| 935 | */ |
| 936 | if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) |
| 937 | return -EINVAL; |
| 938 | if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && |
| 939 | !rdev->wiphy.vendor_commands[i].dumpit)) |
| 940 | return -EINVAL; |
| 941 | } |
| 942 | |
| 943 | #ifdef CONFIG_PM |
| 944 | if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && |
| 945 | (!rdev->wiphy.wowlan->pattern_min_len || |
| 946 | rdev->wiphy.wowlan->pattern_min_len > |
| 947 | rdev->wiphy.wowlan->pattern_max_len))) |
| 948 | return -EINVAL; |
| 949 | #endif |
| 950 | |
| 951 | if (!wiphy->max_num_akm_suites) |
| 952 | wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES; |
| 953 | else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES || |
| 954 | wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES) |
| 955 | return -EINVAL; |
| 956 | |
| 957 | /* check and set up bitrates */ |
| 958 | ieee80211_set_bitrate_flags(wiphy); |
| 959 | |
| 960 | rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; |
| 961 | |
| 962 | rtnl_lock(); |
| 963 | wiphy_lock(&rdev->wiphy); |
| 964 | res = device_add(&rdev->wiphy.dev); |
| 965 | if (res) { |
| 966 | wiphy_unlock(&rdev->wiphy); |
| 967 | rtnl_unlock(); |
| 968 | return res; |
| 969 | } |
| 970 | |
| 971 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
| 972 | cfg80211_rdev_list_generation++; |
| 973 | |
| 974 | /* add to debugfs */ |
| 975 | rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy), |
| 976 | ieee80211_debugfs_dir); |
| 977 | |
| 978 | cfg80211_debugfs_rdev_add(rdev); |
| 979 | nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); |
| 980 | wiphy_unlock(&rdev->wiphy); |
| 981 | |
| 982 | /* set up regulatory info */ |
| 983 | wiphy_regulatory_register(wiphy); |
| 984 | |
| 985 | if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
| 986 | struct regulatory_request request; |
| 987 | |
| 988 | request.wiphy_idx = get_wiphy_idx(wiphy); |
| 989 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; |
| 990 | request.alpha2[0] = '9'; |
| 991 | request.alpha2[1] = '9'; |
| 992 | |
| 993 | nl80211_send_reg_change_event(&request); |
| 994 | } |
| 995 | |
| 996 | /* Check that nobody globally advertises any capabilities they do not |
| 997 | * advertise on all possible interface types. |
| 998 | */ |
| 999 | if (wiphy->extended_capabilities_len && |
| 1000 | wiphy->num_iftype_ext_capab && |
| 1001 | wiphy->iftype_ext_capab) { |
| 1002 | u8 supported_on_all, j; |
| 1003 | const struct wiphy_iftype_ext_capab *capab; |
| 1004 | |
| 1005 | capab = wiphy->iftype_ext_capab; |
| 1006 | for (j = 0; j < wiphy->extended_capabilities_len; j++) { |
| 1007 | if (capab[0].extended_capabilities_len > j) |
| 1008 | supported_on_all = |
| 1009 | capab[0].extended_capabilities[j]; |
| 1010 | else |
| 1011 | supported_on_all = 0x00; |
| 1012 | for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { |
| 1013 | if (j >= capab[i].extended_capabilities_len) { |
| 1014 | supported_on_all = 0x00; |
| 1015 | break; |
| 1016 | } |
| 1017 | supported_on_all &= |
| 1018 | capab[i].extended_capabilities[j]; |
| 1019 | } |
| 1020 | if (WARN_ON(wiphy->extended_capabilities[j] & |
| 1021 | ~supported_on_all)) |
| 1022 | break; |
| 1023 | } |
| 1024 | } |
| 1025 | |
| 1026 | rdev->wiphy.registered = true; |
| 1027 | rtnl_unlock(); |
| 1028 | |
| 1029 | res = rfkill_register(rdev->wiphy.rfkill); |
| 1030 | if (res) { |
| 1031 | rfkill_destroy(rdev->wiphy.rfkill); |
| 1032 | rdev->wiphy.rfkill = NULL; |
| 1033 | wiphy_unregister(&rdev->wiphy); |
| 1034 | return res; |
| 1035 | } |
| 1036 | |
| 1037 | return 0; |
| 1038 | } |
| 1039 | EXPORT_SYMBOL(wiphy_register); |
| 1040 | |
| 1041 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
| 1042 | { |
| 1043 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 1044 | |
| 1045 | if (!rdev->ops->rfkill_poll) |
| 1046 | return; |
| 1047 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
| 1048 | rfkill_resume_polling(wiphy->rfkill); |
| 1049 | } |
| 1050 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); |
| 1051 | |
| 1052 | void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, |
| 1053 | struct wiphy_work *end) |
| 1054 | { |
| 1055 | unsigned int runaway_limit = 100; |
| 1056 | unsigned long flags; |
| 1057 | |
| 1058 | lockdep_assert_held(&rdev->wiphy.mtx); |
| 1059 | |
| 1060 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
| 1061 | while (!list_empty(&rdev->wiphy_work_list)) { |
| 1062 | struct wiphy_work *wk; |
| 1063 | |
| 1064 | wk = list_first_entry(&rdev->wiphy_work_list, |
| 1065 | struct wiphy_work, entry); |
| 1066 | list_del_init(&wk->entry); |
| 1067 | spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); |
| 1068 | |
| 1069 | wk->func(&rdev->wiphy, wk); |
| 1070 | |
| 1071 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
| 1072 | |
| 1073 | if (wk == end) |
| 1074 | break; |
| 1075 | |
| 1076 | if (WARN_ON(--runaway_limit == 0)) |
| 1077 | INIT_LIST_HEAD(&rdev->wiphy_work_list); |
| 1078 | } |
| 1079 | spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); |
| 1080 | } |
| 1081 | |
| 1082 | void wiphy_unregister(struct wiphy *wiphy) |
| 1083 | { |
| 1084 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 1085 | |
| 1086 | wait_event(rdev->dev_wait, ({ |
| 1087 | int __count; |
| 1088 | wiphy_lock(&rdev->wiphy); |
| 1089 | __count = rdev->opencount; |
| 1090 | wiphy_unlock(&rdev->wiphy); |
| 1091 | __count == 0; })); |
| 1092 | |
| 1093 | if (rdev->wiphy.rfkill) |
| 1094 | rfkill_unregister(rdev->wiphy.rfkill); |
| 1095 | |
| 1096 | rtnl_lock(); |
| 1097 | wiphy_lock(&rdev->wiphy); |
| 1098 | nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); |
| 1099 | rdev->wiphy.registered = false; |
| 1100 | |
| 1101 | WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); |
| 1102 | |
| 1103 | /* |
| 1104 | * First remove the hardware from everywhere, this makes |
| 1105 | * it impossible to find from userspace. |
| 1106 | */ |
| 1107 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
| 1108 | list_del_rcu(&rdev->list); |
| 1109 | synchronize_rcu(); |
| 1110 | |
| 1111 | /* |
| 1112 | * If this device got a regulatory hint tell core its |
| 1113 | * free to listen now to a new shiny device regulatory hint |
| 1114 | */ |
| 1115 | wiphy_regulatory_deregister(wiphy); |
| 1116 | |
| 1117 | cfg80211_rdev_list_generation++; |
| 1118 | device_del(&rdev->wiphy.dev); |
| 1119 | |
| 1120 | #ifdef CONFIG_PM |
| 1121 | if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) |
| 1122 | rdev_set_wakeup(rdev, false); |
| 1123 | #endif |
| 1124 | |
| 1125 | /* surely nothing is reachable now, clean up work */ |
| 1126 | cfg80211_process_wiphy_works(rdev, NULL); |
| 1127 | wiphy_unlock(&rdev->wiphy); |
| 1128 | rtnl_unlock(); |
| 1129 | |
| 1130 | /* this has nothing to do now but make sure it's gone */ |
| 1131 | cancel_work_sync(&rdev->wiphy_work); |
| 1132 | |
| 1133 | cancel_work_sync(&rdev->conn_work); |
| 1134 | flush_work(&rdev->event_work); |
| 1135 | cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); |
| 1136 | cancel_delayed_work_sync(&rdev->background_cac_done_wk); |
| 1137 | flush_work(&rdev->destroy_work); |
| 1138 | flush_work(&rdev->propagate_radar_detect_wk); |
| 1139 | flush_work(&rdev->propagate_cac_done_wk); |
| 1140 | flush_work(&rdev->mgmt_registrations_update_wk); |
| 1141 | flush_work(&rdev->background_cac_abort_wk); |
| 1142 | |
| 1143 | cfg80211_rdev_free_wowlan(rdev); |
| 1144 | cfg80211_rdev_free_coalesce(rdev); |
| 1145 | } |
| 1146 | EXPORT_SYMBOL(wiphy_unregister); |
| 1147 | |
| 1148 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
| 1149 | { |
| 1150 | struct cfg80211_internal_bss *scan, *tmp; |
| 1151 | struct cfg80211_beacon_registration *reg, *treg; |
| 1152 | rfkill_destroy(rdev->wiphy.rfkill); |
| 1153 | list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { |
| 1154 | list_del(®->list); |
| 1155 | kfree(reg); |
| 1156 | } |
| 1157 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) |
| 1158 | cfg80211_put_bss(&rdev->wiphy, &scan->pub); |
| 1159 | mutex_destroy(&rdev->wiphy.mtx); |
| 1160 | |
| 1161 | /* |
| 1162 | * The 'regd' can only be non-NULL if we never finished |
| 1163 | * initializing the wiphy and thus never went through the |
| 1164 | * unregister path - e.g. in failure scenarios. Thus, it |
| 1165 | * cannot have been visible to anyone if non-NULL, so we |
| 1166 | * can just free it here. |
| 1167 | */ |
| 1168 | kfree(rcu_dereference_raw(rdev->wiphy.regd)); |
| 1169 | |
| 1170 | kfree(rdev); |
| 1171 | } |
| 1172 | |
| 1173 | void wiphy_free(struct wiphy *wiphy) |
| 1174 | { |
| 1175 | put_device(&wiphy->dev); |
| 1176 | } |
| 1177 | EXPORT_SYMBOL(wiphy_free); |
| 1178 | |
| 1179 | void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked, |
| 1180 | enum rfkill_hard_block_reasons reason) |
| 1181 | { |
| 1182 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 1183 | |
| 1184 | if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason)) |
| 1185 | schedule_work(&rdev->rfkill_block); |
| 1186 | } |
| 1187 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason); |
| 1188 | |
| 1189 | static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, |
| 1190 | bool unregister_netdev) |
| 1191 | { |
| 1192 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
| 1193 | struct cfg80211_cqm_config *cqm_config; |
| 1194 | unsigned int link_id; |
| 1195 | |
| 1196 | ASSERT_RTNL(); |
| 1197 | lockdep_assert_held(&rdev->wiphy.mtx); |
| 1198 | |
| 1199 | nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); |
| 1200 | |
| 1201 | wdev->registered = false; |
| 1202 | |
| 1203 | if (wdev->netdev) { |
| 1204 | sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211"); |
| 1205 | if (unregister_netdev) |
| 1206 | unregister_netdevice(wdev->netdev); |
| 1207 | } |
| 1208 | |
| 1209 | list_del_rcu(&wdev->list); |
| 1210 | synchronize_net(); |
| 1211 | rdev->devlist_generation++; |
| 1212 | |
| 1213 | cfg80211_mlme_purge_registrations(wdev); |
| 1214 | |
| 1215 | switch (wdev->iftype) { |
| 1216 | case NL80211_IFTYPE_P2P_DEVICE: |
| 1217 | cfg80211_stop_p2p_device(rdev, wdev); |
| 1218 | break; |
| 1219 | case NL80211_IFTYPE_NAN: |
| 1220 | cfg80211_stop_nan(rdev, wdev); |
| 1221 | break; |
| 1222 | default: |
| 1223 | break; |
| 1224 | } |
| 1225 | |
| 1226 | #ifdef CONFIG_CFG80211_WEXT |
| 1227 | kfree_sensitive(wdev->wext.keys); |
| 1228 | wdev->wext.keys = NULL; |
| 1229 | #endif |
| 1230 | wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work); |
| 1231 | /* deleted from the list, so can't be found from nl80211 any more */ |
| 1232 | cqm_config = rcu_access_pointer(wdev->cqm_config); |
| 1233 | kfree_rcu(cqm_config, rcu_head); |
| 1234 | |
| 1235 | /* |
| 1236 | * Ensure that all events have been processed and |
| 1237 | * freed. |
| 1238 | */ |
| 1239 | cfg80211_process_wdev_events(wdev); |
| 1240 | |
| 1241 | if (wdev->iftype == NL80211_IFTYPE_STATION || |
| 1242 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { |
| 1243 | for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) { |
| 1244 | struct cfg80211_internal_bss *curbss; |
| 1245 | |
| 1246 | curbss = wdev->links[link_id].client.current_bss; |
| 1247 | |
| 1248 | if (WARN_ON(curbss)) { |
| 1249 | cfg80211_unhold_bss(curbss); |
| 1250 | cfg80211_put_bss(wdev->wiphy, &curbss->pub); |
| 1251 | wdev->links[link_id].client.current_bss = NULL; |
| 1252 | } |
| 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | wdev->connected = false; |
| 1257 | } |
| 1258 | |
| 1259 | void cfg80211_unregister_wdev(struct wireless_dev *wdev) |
| 1260 | { |
| 1261 | _cfg80211_unregister_wdev(wdev, true); |
| 1262 | } |
| 1263 | EXPORT_SYMBOL(cfg80211_unregister_wdev); |
| 1264 | |
| 1265 | static const struct device_type wiphy_type = { |
| 1266 | .name = "wlan", |
| 1267 | }; |
| 1268 | |
| 1269 | void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, |
| 1270 | enum nl80211_iftype iftype, int num) |
| 1271 | { |
| 1272 | lockdep_assert_held(&rdev->wiphy.mtx); |
| 1273 | |
| 1274 | rdev->num_running_ifaces += num; |
| 1275 | if (iftype == NL80211_IFTYPE_MONITOR) |
| 1276 | rdev->num_running_monitor_ifaces += num; |
| 1277 | } |
| 1278 | |
| 1279 | void cfg80211_leave(struct cfg80211_registered_device *rdev, |
| 1280 | struct wireless_dev *wdev) |
| 1281 | { |
| 1282 | struct net_device *dev = wdev->netdev; |
| 1283 | struct cfg80211_sched_scan_request *pos, *tmp; |
| 1284 | |
| 1285 | lockdep_assert_held(&rdev->wiphy.mtx); |
| 1286 | |
| 1287 | cfg80211_pmsr_wdev_down(wdev); |
| 1288 | |
| 1289 | cfg80211_stop_background_radar_detection(wdev); |
| 1290 | |
| 1291 | switch (wdev->iftype) { |
| 1292 | case NL80211_IFTYPE_ADHOC: |
| 1293 | cfg80211_leave_ibss(rdev, dev, true); |
| 1294 | break; |
| 1295 | case NL80211_IFTYPE_P2P_CLIENT: |
| 1296 | case NL80211_IFTYPE_STATION: |
| 1297 | list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, |
| 1298 | list) { |
| 1299 | if (dev == pos->dev) |
| 1300 | cfg80211_stop_sched_scan_req(rdev, pos, false); |
| 1301 | } |
| 1302 | |
| 1303 | #ifdef CONFIG_CFG80211_WEXT |
| 1304 | kfree(wdev->wext.ie); |
| 1305 | wdev->wext.ie = NULL; |
| 1306 | wdev->wext.ie_len = 0; |
| 1307 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
| 1308 | #endif |
| 1309 | cfg80211_disconnect(rdev, dev, |
| 1310 | WLAN_REASON_DEAUTH_LEAVING, true); |
| 1311 | break; |
| 1312 | case NL80211_IFTYPE_MESH_POINT: |
| 1313 | cfg80211_leave_mesh(rdev, dev); |
| 1314 | break; |
| 1315 | case NL80211_IFTYPE_AP: |
| 1316 | case NL80211_IFTYPE_P2P_GO: |
| 1317 | cfg80211_stop_ap(rdev, dev, -1, true); |
| 1318 | break; |
| 1319 | case NL80211_IFTYPE_OCB: |
| 1320 | cfg80211_leave_ocb(rdev, dev); |
| 1321 | break; |
| 1322 | case NL80211_IFTYPE_P2P_DEVICE: |
| 1323 | case NL80211_IFTYPE_NAN: |
| 1324 | /* cannot happen, has no netdev */ |
| 1325 | break; |
| 1326 | case NL80211_IFTYPE_AP_VLAN: |
| 1327 | case NL80211_IFTYPE_MONITOR: |
| 1328 | /* nothing to do */ |
| 1329 | break; |
| 1330 | case NL80211_IFTYPE_UNSPECIFIED: |
| 1331 | case NL80211_IFTYPE_WDS: |
| 1332 | case NUM_NL80211_IFTYPES: |
| 1333 | /* invalid */ |
| 1334 | break; |
| 1335 | } |
| 1336 | } |
| 1337 | |
| 1338 | void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, |
| 1339 | gfp_t gfp) |
| 1340 | { |
| 1341 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 1342 | struct cfg80211_event *ev; |
| 1343 | unsigned long flags; |
| 1344 | |
| 1345 | trace_cfg80211_stop_iface(wiphy, wdev); |
| 1346 | |
| 1347 | ev = kzalloc(sizeof(*ev), gfp); |
| 1348 | if (!ev) |
| 1349 | return; |
| 1350 | |
| 1351 | ev->type = EVENT_STOPPED; |
| 1352 | |
| 1353 | spin_lock_irqsave(&wdev->event_lock, flags); |
| 1354 | list_add_tail(&ev->list, &wdev->event_list); |
| 1355 | spin_unlock_irqrestore(&wdev->event_lock, flags); |
| 1356 | queue_work(cfg80211_wq, &rdev->event_work); |
| 1357 | } |
| 1358 | EXPORT_SYMBOL(cfg80211_stop_iface); |
| 1359 | |
| 1360 | void cfg80211_init_wdev(struct wireless_dev *wdev) |
| 1361 | { |
| 1362 | INIT_LIST_HEAD(&wdev->event_list); |
| 1363 | spin_lock_init(&wdev->event_lock); |
| 1364 | INIT_LIST_HEAD(&wdev->mgmt_registrations); |
| 1365 | INIT_LIST_HEAD(&wdev->pmsr_list); |
| 1366 | spin_lock_init(&wdev->pmsr_lock); |
| 1367 | INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); |
| 1368 | |
| 1369 | #ifdef CONFIG_CFG80211_WEXT |
| 1370 | wdev->wext.default_key = -1; |
| 1371 | wdev->wext.default_mgmt_key = -1; |
| 1372 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
| 1373 | #endif |
| 1374 | |
| 1375 | wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work); |
| 1376 | |
| 1377 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
| 1378 | wdev->ps = true; |
| 1379 | else |
| 1380 | wdev->ps = false; |
| 1381 | /* allow mac80211 to determine the timeout */ |
| 1382 | wdev->ps_timeout = -1; |
| 1383 | |
| 1384 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
| 1385 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
| 1386 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
| 1387 | wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; |
| 1388 | |
| 1389 | INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); |
| 1390 | } |
| 1391 | |
| 1392 | void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, |
| 1393 | struct wireless_dev *wdev) |
| 1394 | { |
| 1395 | ASSERT_RTNL(); |
| 1396 | lockdep_assert_held(&rdev->wiphy.mtx); |
| 1397 | |
| 1398 | /* |
| 1399 | * We get here also when the interface changes network namespaces, |
| 1400 | * as it's registered into the new one, but we don't want it to |
| 1401 | * change ID in that case. Checking if the ID is already assigned |
| 1402 | * works, because 0 isn't considered a valid ID and the memory is |
| 1403 | * 0-initialized. |
| 1404 | */ |
| 1405 | if (!wdev->identifier) |
| 1406 | wdev->identifier = ++rdev->wdev_id; |
| 1407 | list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); |
| 1408 | rdev->devlist_generation++; |
| 1409 | wdev->registered = true; |
| 1410 | |
| 1411 | if (wdev->netdev && |
| 1412 | sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj, |
| 1413 | "phy80211")) |
| 1414 | pr_err("failed to add phy80211 symlink to netdev!\n"); |
| 1415 | |
| 1416 | nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); |
| 1417 | } |
| 1418 | |
| 1419 | int cfg80211_register_netdevice(struct net_device *dev) |
| 1420 | { |
| 1421 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
| 1422 | struct cfg80211_registered_device *rdev; |
| 1423 | int ret; |
| 1424 | |
| 1425 | ASSERT_RTNL(); |
| 1426 | |
| 1427 | if (WARN_ON(!wdev)) |
| 1428 | return -EINVAL; |
| 1429 | |
| 1430 | rdev = wiphy_to_rdev(wdev->wiphy); |
| 1431 | |
| 1432 | lockdep_assert_held(&rdev->wiphy.mtx); |
| 1433 | |
| 1434 | /* we'll take care of this */ |
| 1435 | wdev->registered = true; |
| 1436 | wdev->registering = true; |
| 1437 | ret = register_netdevice(dev); |
| 1438 | if (ret) |
| 1439 | goto out; |
| 1440 | |
| 1441 | cfg80211_register_wdev(rdev, wdev); |
| 1442 | ret = 0; |
| 1443 | out: |
| 1444 | wdev->registering = false; |
| 1445 | if (ret) |
| 1446 | wdev->registered = false; |
| 1447 | return ret; |
| 1448 | } |
| 1449 | EXPORT_SYMBOL(cfg80211_register_netdevice); |
| 1450 | |
| 1451 | static int cfg80211_netdev_notifier_call(struct notifier_block *nb, |
| 1452 | unsigned long state, void *ptr) |
| 1453 | { |
| 1454 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
| 1455 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
| 1456 | struct cfg80211_registered_device *rdev; |
| 1457 | struct cfg80211_sched_scan_request *pos, *tmp; |
| 1458 | |
| 1459 | if (!wdev) |
| 1460 | return NOTIFY_DONE; |
| 1461 | |
| 1462 | rdev = wiphy_to_rdev(wdev->wiphy); |
| 1463 | |
| 1464 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
| 1465 | |
| 1466 | switch (state) { |
| 1467 | case NETDEV_POST_INIT: |
| 1468 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); |
| 1469 | wdev->netdev = dev; |
| 1470 | /* can only change netns with wiphy */ |
| 1471 | dev->features |= NETIF_F_NETNS_LOCAL; |
| 1472 | |
| 1473 | cfg80211_init_wdev(wdev); |
| 1474 | break; |
| 1475 | case NETDEV_REGISTER: |
| 1476 | if (!wdev->registered) { |
| 1477 | wiphy_lock(&rdev->wiphy); |
| 1478 | cfg80211_register_wdev(rdev, wdev); |
| 1479 | wiphy_unlock(&rdev->wiphy); |
| 1480 | } |
| 1481 | break; |
| 1482 | case NETDEV_UNREGISTER: |
| 1483 | /* |
| 1484 | * It is possible to get NETDEV_UNREGISTER multiple times, |
| 1485 | * so check wdev->registered. |
| 1486 | */ |
| 1487 | if (wdev->registered && !wdev->registering) { |
| 1488 | wiphy_lock(&rdev->wiphy); |
| 1489 | _cfg80211_unregister_wdev(wdev, false); |
| 1490 | wiphy_unlock(&rdev->wiphy); |
| 1491 | } |
| 1492 | break; |
| 1493 | case NETDEV_GOING_DOWN: |
| 1494 | wiphy_lock(&rdev->wiphy); |
| 1495 | cfg80211_leave(rdev, wdev); |
| 1496 | cfg80211_remove_links(wdev); |
| 1497 | wiphy_unlock(&rdev->wiphy); |
| 1498 | /* since we just did cfg80211_leave() nothing to do there */ |
| 1499 | cancel_work_sync(&wdev->disconnect_wk); |
| 1500 | cancel_work_sync(&wdev->pmsr_free_wk); |
| 1501 | break; |
| 1502 | case NETDEV_DOWN: |
| 1503 | wiphy_lock(&rdev->wiphy); |
| 1504 | cfg80211_update_iface_num(rdev, wdev->iftype, -1); |
| 1505 | if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
| 1506 | if (WARN_ON(!rdev->scan_req->notified && |
| 1507 | (!rdev->int_scan_req || |
| 1508 | !rdev->int_scan_req->notified))) |
| 1509 | rdev->scan_req->info.aborted = true; |
| 1510 | ___cfg80211_scan_done(rdev, false); |
| 1511 | } |
| 1512 | |
| 1513 | list_for_each_entry_safe(pos, tmp, |
| 1514 | &rdev->sched_scan_req_list, list) { |
| 1515 | if (WARN_ON(pos->dev == wdev->netdev)) |
| 1516 | cfg80211_stop_sched_scan_req(rdev, pos, false); |
| 1517 | } |
| 1518 | |
| 1519 | rdev->opencount--; |
| 1520 | wiphy_unlock(&rdev->wiphy); |
| 1521 | wake_up(&rdev->dev_wait); |
| 1522 | break; |
| 1523 | case NETDEV_UP: |
| 1524 | wiphy_lock(&rdev->wiphy); |
| 1525 | cfg80211_update_iface_num(rdev, wdev->iftype, 1); |
| 1526 | switch (wdev->iftype) { |
| 1527 | #ifdef CONFIG_CFG80211_WEXT |
| 1528 | case NL80211_IFTYPE_ADHOC: |
| 1529 | cfg80211_ibss_wext_join(rdev, wdev); |
| 1530 | break; |
| 1531 | case NL80211_IFTYPE_STATION: |
| 1532 | cfg80211_mgd_wext_connect(rdev, wdev); |
| 1533 | break; |
| 1534 | #endif |
| 1535 | #ifdef CONFIG_MAC80211_MESH |
| 1536 | case NL80211_IFTYPE_MESH_POINT: |
| 1537 | { |
| 1538 | /* backward compat code... */ |
| 1539 | struct mesh_setup setup; |
| 1540 | memcpy(&setup, &default_mesh_setup, |
| 1541 | sizeof(setup)); |
| 1542 | /* back compat only needed for mesh_id */ |
| 1543 | setup.mesh_id = wdev->u.mesh.id; |
| 1544 | setup.mesh_id_len = wdev->u.mesh.id_up_len; |
| 1545 | if (wdev->u.mesh.id_up_len) |
| 1546 | __cfg80211_join_mesh(rdev, dev, |
| 1547 | &setup, |
| 1548 | &default_mesh_config); |
| 1549 | break; |
| 1550 | } |
| 1551 | #endif |
| 1552 | default: |
| 1553 | break; |
| 1554 | } |
| 1555 | rdev->opencount++; |
| 1556 | |
| 1557 | /* |
| 1558 | * Configure power management to the driver here so that its |
| 1559 | * correctly set also after interface type changes etc. |
| 1560 | */ |
| 1561 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
| 1562 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && |
| 1563 | rdev->ops->set_power_mgmt && |
| 1564 | rdev_set_power_mgmt(rdev, dev, wdev->ps, |
| 1565 | wdev->ps_timeout)) { |
| 1566 | /* assume this means it's off */ |
| 1567 | wdev->ps = false; |
| 1568 | } |
| 1569 | wiphy_unlock(&rdev->wiphy); |
| 1570 | break; |
| 1571 | case NETDEV_PRE_UP: |
| 1572 | if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype, |
| 1573 | wdev->use_4addr, 0)) |
| 1574 | return notifier_from_errno(-EOPNOTSUPP); |
| 1575 | |
| 1576 | if (rfkill_blocked(rdev->wiphy.rfkill)) |
| 1577 | return notifier_from_errno(-ERFKILL); |
| 1578 | break; |
| 1579 | default: |
| 1580 | return NOTIFY_DONE; |
| 1581 | } |
| 1582 | |
| 1583 | wireless_nlevent_flush(); |
| 1584 | |
| 1585 | return NOTIFY_OK; |
| 1586 | } |
| 1587 | |
| 1588 | static struct notifier_block cfg80211_netdev_notifier = { |
| 1589 | .notifier_call = cfg80211_netdev_notifier_call, |
| 1590 | }; |
| 1591 | |
| 1592 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
| 1593 | { |
| 1594 | struct cfg80211_registered_device *rdev; |
| 1595 | |
| 1596 | rtnl_lock(); |
| 1597 | for_each_rdev(rdev) { |
| 1598 | if (net_eq(wiphy_net(&rdev->wiphy), net)) |
| 1599 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); |
| 1600 | } |
| 1601 | rtnl_unlock(); |
| 1602 | } |
| 1603 | |
| 1604 | static struct pernet_operations cfg80211_pernet_ops = { |
| 1605 | .exit = cfg80211_pernet_exit, |
| 1606 | }; |
| 1607 | |
| 1608 | void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work) |
| 1609 | { |
| 1610 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 1611 | unsigned long flags; |
| 1612 | |
| 1613 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
| 1614 | if (list_empty(&work->entry)) |
| 1615 | list_add_tail(&work->entry, &rdev->wiphy_work_list); |
| 1616 | spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); |
| 1617 | |
| 1618 | queue_work(system_unbound_wq, &rdev->wiphy_work); |
| 1619 | } |
| 1620 | EXPORT_SYMBOL_GPL(wiphy_work_queue); |
| 1621 | |
| 1622 | void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work) |
| 1623 | { |
| 1624 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 1625 | unsigned long flags; |
| 1626 | |
| 1627 | lockdep_assert_held(&wiphy->mtx); |
| 1628 | |
| 1629 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
| 1630 | if (!list_empty(&work->entry)) |
| 1631 | list_del_init(&work->entry); |
| 1632 | spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); |
| 1633 | } |
| 1634 | EXPORT_SYMBOL_GPL(wiphy_work_cancel); |
| 1635 | |
| 1636 | void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work) |
| 1637 | { |
| 1638 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| 1639 | unsigned long flags; |
| 1640 | bool run; |
| 1641 | |
| 1642 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
| 1643 | run = !work || !list_empty(&work->entry); |
| 1644 | spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); |
| 1645 | |
| 1646 | if (run) |
| 1647 | cfg80211_process_wiphy_works(rdev, work); |
| 1648 | } |
| 1649 | EXPORT_SYMBOL_GPL(wiphy_work_flush); |
| 1650 | |
| 1651 | void wiphy_delayed_work_timer(struct timer_list *t) |
| 1652 | { |
| 1653 | struct wiphy_delayed_work *dwork = from_timer(dwork, t, timer); |
| 1654 | |
| 1655 | wiphy_work_queue(dwork->wiphy, &dwork->work); |
| 1656 | } |
| 1657 | EXPORT_SYMBOL(wiphy_delayed_work_timer); |
| 1658 | |
| 1659 | void wiphy_delayed_work_queue(struct wiphy *wiphy, |
| 1660 | struct wiphy_delayed_work *dwork, |
| 1661 | unsigned long delay) |
| 1662 | { |
| 1663 | if (!delay) { |
| 1664 | del_timer(&dwork->timer); |
| 1665 | wiphy_work_queue(wiphy, &dwork->work); |
| 1666 | return; |
| 1667 | } |
| 1668 | |
| 1669 | dwork->wiphy = wiphy; |
| 1670 | mod_timer(&dwork->timer, jiffies + delay); |
| 1671 | } |
| 1672 | EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue); |
| 1673 | |
| 1674 | void wiphy_delayed_work_cancel(struct wiphy *wiphy, |
| 1675 | struct wiphy_delayed_work *dwork) |
| 1676 | { |
| 1677 | lockdep_assert_held(&wiphy->mtx); |
| 1678 | |
| 1679 | del_timer_sync(&dwork->timer); |
| 1680 | wiphy_work_cancel(wiphy, &dwork->work); |
| 1681 | } |
| 1682 | EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel); |
| 1683 | |
| 1684 | void wiphy_delayed_work_flush(struct wiphy *wiphy, |
| 1685 | struct wiphy_delayed_work *dwork) |
| 1686 | { |
| 1687 | lockdep_assert_held(&wiphy->mtx); |
| 1688 | |
| 1689 | del_timer_sync(&dwork->timer); |
| 1690 | wiphy_work_flush(wiphy, &dwork->work); |
| 1691 | } |
| 1692 | EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush); |
| 1693 | |
| 1694 | static int __init cfg80211_init(void) |
| 1695 | { |
| 1696 | int err; |
| 1697 | |
| 1698 | err = register_pernet_device(&cfg80211_pernet_ops); |
| 1699 | if (err) |
| 1700 | goto out_fail_pernet; |
| 1701 | |
| 1702 | err = wiphy_sysfs_init(); |
| 1703 | if (err) |
| 1704 | goto out_fail_sysfs; |
| 1705 | |
| 1706 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); |
| 1707 | if (err) |
| 1708 | goto out_fail_notifier; |
| 1709 | |
| 1710 | err = nl80211_init(); |
| 1711 | if (err) |
| 1712 | goto out_fail_nl80211; |
| 1713 | |
| 1714 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
| 1715 | |
| 1716 | err = regulatory_init(); |
| 1717 | if (err) |
| 1718 | goto out_fail_reg; |
| 1719 | |
| 1720 | cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); |
| 1721 | if (!cfg80211_wq) { |
| 1722 | err = -ENOMEM; |
| 1723 | goto out_fail_wq; |
| 1724 | } |
| 1725 | |
| 1726 | return 0; |
| 1727 | |
| 1728 | out_fail_wq: |
| 1729 | regulatory_exit(); |
| 1730 | out_fail_reg: |
| 1731 | debugfs_remove(ieee80211_debugfs_dir); |
| 1732 | nl80211_exit(); |
| 1733 | out_fail_nl80211: |
| 1734 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
| 1735 | out_fail_notifier: |
| 1736 | wiphy_sysfs_exit(); |
| 1737 | out_fail_sysfs: |
| 1738 | unregister_pernet_device(&cfg80211_pernet_ops); |
| 1739 | out_fail_pernet: |
| 1740 | return err; |
| 1741 | } |
| 1742 | fs_initcall(cfg80211_init); |
| 1743 | |
| 1744 | static void __exit cfg80211_exit(void) |
| 1745 | { |
| 1746 | debugfs_remove(ieee80211_debugfs_dir); |
| 1747 | nl80211_exit(); |
| 1748 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
| 1749 | wiphy_sysfs_exit(); |
| 1750 | regulatory_exit(); |
| 1751 | unregister_pernet_device(&cfg80211_pernet_ops); |
| 1752 | destroy_workqueue(cfg80211_wq); |
| 1753 | } |
| 1754 | module_exit(cfg80211_exit); |