blob: 086cddd03ba6edd79d1609ecf713146bc756c1ff [file] [log] [blame]
Johannes Berg704232c2007-04-23 12:20:05 -07001/*
2 * This is the linux wireless configuration interface.
3 *
Johannes Berg5f2aa252010-01-17 15:49:02 +01004 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
Johannes Berg704232c2007-04-23 12:20:05 -07005 */
6
Joe Perchese9c02682010-11-16 19:56:49 -08007#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
Johannes Berg704232c2007-04-23 12:20:05 -07009#include <linux/if.h>
10#include <linux/module.h>
11#include <linux/err.h>
Johannes Berg704232c2007-04-23 12:20:05 -070012#include <linux/list.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
Johannes Berg704232c2007-04-23 12:20:05 -070014#include <linux/nl80211.h>
15#include <linux/debugfs.h>
16#include <linux/notifier.h>
17#include <linux/device.h>
Zhu Yi16a832e2009-08-19 16:08:22 +080018#include <linux/etherdevice.h>
Johannes Berg1f87f7d2009-06-02 13:01:41 +020019#include <linux/rtnetlink.h>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +040020#include <linux/sched.h>
Johannes Berg704232c2007-04-23 12:20:05 -070021#include <net/genetlink.h>
22#include <net/cfg80211.h>
Johannes Berg55682962007-09-20 13:09:35 -040023#include "nl80211.h"
Johannes Berg704232c2007-04-23 12:20:05 -070024#include "core.h"
25#include "sysfs.h"
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -040026#include "debugfs.h"
Johannes Berga9a11622009-07-27 12:01:53 +020027#include "wext-compat.h"
John W. Linville4890e3b2009-09-30 14:50:17 -040028#include "ethtool.h"
Hila Gonene35e4d22012-06-27 17:19:42 +030029#include "rdev-ops.h"
Johannes Berg704232c2007-04-23 12:20:05 -070030
31/* name for sysfs, %d is appended */
32#define PHY_NAME "phy"
33
34MODULE_AUTHOR("Johannes Berg");
35MODULE_LICENSE("GPL");
36MODULE_DESCRIPTION("wireless configuration support");
Marcel Holtmannfb4e1562013-04-28 16:22:06 -070037MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
Johannes Berg704232c2007-04-23 12:20:05 -070038
Johannes Berg5fe231e2013-05-08 21:45:15 +020039/* RCU-protected (and RTNL for writers) */
Johannes Berg79c97e92009-07-07 03:56:12 +020040LIST_HEAD(cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +020041int cfg80211_rdev_list_generation;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050042
Johannes Berg704232c2007-04-23 12:20:05 -070043/* for debugfs */
44static struct dentry *ieee80211_debugfs_dir;
45
Alban Browaeyse60d7442009-11-25 15:13:00 +010046/* for the cleanup, scan and event works */
47struct workqueue_struct *cfg80211_wq;
48
Amitkumar Karwar40db6c72011-04-21 14:10:27 -070049static bool cfg80211_disable_40mhz_24ghz;
50module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
51MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
52 "Disable 40MHz support in the 2.4GHz band");
53
Johannes Berg79c97e92009-07-07 03:56:12 +020054struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
Johannes Berg55682962007-09-20 13:09:35 -040055{
Johannes Berg79c97e92009-07-07 03:56:12 +020056 struct cfg80211_registered_device *result = NULL, *rdev;
Johannes Berg55682962007-09-20 13:09:35 -040057
Johannes Berg5fe231e2013-05-08 21:45:15 +020058 ASSERT_RTNL();
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -050059
Johannes Berg79c97e92009-07-07 03:56:12 +020060 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
61 if (rdev->wiphy_idx == wiphy_idx) {
62 result = rdev;
Johannes Berg55682962007-09-20 13:09:35 -040063 break;
64 }
65 }
66
67 return result;
68}
69
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050070int get_wiphy_idx(struct wiphy *wiphy)
71{
Johannes Bergf4173762012-12-03 18:23:37 +010072 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
73
Johannes Berg79c97e92009-07-07 03:56:12 +020074 return rdev->wiphy_idx;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050075}
76
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050077struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
78{
Johannes Berg79c97e92009-07-07 03:56:12 +020079 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050080
Johannes Berg5fe231e2013-05-08 21:45:15 +020081 ASSERT_RTNL();
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050082
Johannes Berg79c97e92009-07-07 03:56:12 +020083 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
84 if (!rdev)
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050085 return NULL;
Johannes Berg79c97e92009-07-07 03:56:12 +020086 return &rdev->wiphy;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050087}
88
Johannes Berg55682962007-09-20 13:09:35 -040089int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
90 char *newname)
91{
Johannes Berg79c97e92009-07-07 03:56:12 +020092 struct cfg80211_registered_device *rdev2;
Johannes Berg76232252010-10-11 14:46:52 -040093 int wiphy_idx, taken = -1, result, digits;
Johannes Berg55682962007-09-20 13:09:35 -040094
Johannes Berg5fe231e2013-05-08 21:45:15 +020095 ASSERT_RTNL();
Eric W. Biederman2940bb62008-05-08 14:30:18 -070096
Johannes Berg76232252010-10-11 14:46:52 -040097 /* prohibit calling the thing phy%d when %d is not its number */
98 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
99 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
100 /* count number of places needed to print wiphy_idx */
101 digits = 1;
102 while (wiphy_idx /= 10)
103 digits++;
104 /*
105 * deny the name if it is phy<idx> where <idx> is printed
106 * without leading zeroes. taken == strlen(newname) here
107 */
108 if (taken == strlen(PHY_NAME) + digits)
109 return -EINVAL;
110 }
111
112
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700113 /* Ignore nop renames */
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700114 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100115 return 0;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700116
117 /* Ensure another device does not already have this name. */
Johannes Berg79c97e92009-07-07 03:56:12 +0200118 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
119 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
Johannes Berg76232252010-10-11 14:46:52 -0400120 return -EINVAL;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700121
Johannes Berg55682962007-09-20 13:09:35 -0400122 result = device_rename(&rdev->wiphy.dev, newname);
123 if (result)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100124 return result;
Johannes Berg55682962007-09-20 13:09:35 -0400125
Johannes Berg33c03602008-10-08 10:23:48 +0200126 if (rdev->wiphy.debugfsdir &&
127 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
Johannes Berg55682962007-09-20 13:09:35 -0400128 rdev->wiphy.debugfsdir,
129 rdev->wiphy.debugfsdir->d_parent,
130 newname))
Joe Perchese9c02682010-11-16 19:56:49 -0800131 pr_err("failed to rename debugfs dir to %s!\n", newname);
Johannes Berg55682962007-09-20 13:09:35 -0400132
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100133 nl80211_notify_dev_rename(rdev);
Johannes Berg55682962007-09-20 13:09:35 -0400134
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100135 return 0;
Johannes Berg55682962007-09-20 13:09:35 -0400136}
137
Johannes Berg463d0182009-07-14 00:33:35 +0200138int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
139 struct net *net)
140{
141 struct wireless_dev *wdev;
142 int err = 0;
143
Johannes Berg5be83de2009-11-19 00:56:28 +0100144 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
Johannes Berg463d0182009-07-14 00:33:35 +0200145 return -EOPNOTSUPP;
146
Johannes Berg89a54e42012-06-15 14:33:17 +0200147 list_for_each_entry(wdev, &rdev->wdev_list, list) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200148 if (!wdev->netdev)
149 continue;
Johannes Berg463d0182009-07-14 00:33:35 +0200150 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
151 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
152 if (err)
153 break;
154 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
155 }
156
157 if (err) {
158 /* failed -- clean up to old netns */
159 net = wiphy_net(&rdev->wiphy);
160
Johannes Berg89a54e42012-06-15 14:33:17 +0200161 list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
Johannes Berg463d0182009-07-14 00:33:35 +0200162 list) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200163 if (!wdev->netdev)
164 continue;
Johannes Berg463d0182009-07-14 00:33:35 +0200165 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
166 err = dev_change_net_namespace(wdev->netdev, net,
167 "wlan%d");
168 WARN_ON(err);
169 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
170 }
Johannes Berg04600792010-08-05 17:45:15 +0200171
172 return err;
Johannes Berg463d0182009-07-14 00:33:35 +0200173 }
174
175 wiphy_net_set(&rdev->wiphy, net);
176
Johannes Berg04600792010-08-05 17:45:15 +0200177 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
178 WARN_ON(err);
179
180 return 0;
Johannes Berg463d0182009-07-14 00:33:35 +0200181}
182
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200183static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
184{
Johannes Berg79c97e92009-07-07 03:56:12 +0200185 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200186
Hila Gonene35e4d22012-06-27 17:19:42 +0300187 rdev_rfkill_poll(rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200188}
189
Johannes Bergf9f47522013-03-19 15:04:07 +0100190void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
191 struct wireless_dev *wdev)
192{
Johannes Berg5fe231e2013-05-08 21:45:15 +0200193 ASSERT_RTNL();
Johannes Bergf9f47522013-03-19 15:04:07 +0100194
195 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
196 return;
197
198 if (!wdev->p2p_started)
199 return;
200
201 rdev_stop_p2p_device(rdev, wdev);
202 wdev->p2p_started = false;
203
204 rdev->opencount--;
205
Johannes Berga6173022014-01-22 11:14:18 +0200206 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
207 if (WARN_ON(!rdev->scan_req->notified))
208 rdev->scan_req->aborted = true;
Johannes Bergf9d15d12014-01-22 11:14:19 +0200209 ___cfg80211_scan_done(rdev, false);
Johannes Berga6173022014-01-22 11:14:18 +0200210 }
Johannes Bergf9f47522013-03-19 15:04:07 +0100211}
212
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200213static int cfg80211_rfkill_set_block(void *data, bool blocked)
214{
Johannes Berg79c97e92009-07-07 03:56:12 +0200215 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200216 struct wireless_dev *wdev;
217
218 if (!blocked)
219 return 0;
220
221 rtnl_lock();
Johannes Bergf9f47522013-03-19 15:04:07 +0100222
Johannes Berg98104fde2012-06-16 00:19:54 +0200223 list_for_each_entry(wdev, &rdev->wdev_list, list) {
224 if (wdev->netdev) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200225 dev_close(wdev->netdev);
Johannes Berg98104fde2012-06-16 00:19:54 +0200226 continue;
227 }
228 /* otherwise, check iftype */
229 switch (wdev->iftype) {
230 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf9f47522013-03-19 15:04:07 +0100231 cfg80211_stop_p2p_device(rdev, wdev);
Johannes Berg98104fde2012-06-16 00:19:54 +0200232 break;
233 default:
234 break;
235 }
236 }
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200237
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200238 rtnl_unlock();
239
240 return 0;
241}
242
243static void cfg80211_rfkill_sync_work(struct work_struct *work)
244{
Johannes Berg79c97e92009-07-07 03:56:12 +0200245 struct cfg80211_registered_device *rdev;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200246
Johannes Berg79c97e92009-07-07 03:56:12 +0200247 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
248 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200249}
250
Johannes Berg667503dd2009-07-07 03:56:11 +0200251static void cfg80211_event_work(struct work_struct *work)
252{
253 struct cfg80211_registered_device *rdev;
Johannes Berg667503dd2009-07-07 03:56:11 +0200254
255 rdev = container_of(work, struct cfg80211_registered_device,
256 event_work);
257
258 rtnl_lock();
Johannes Berg3d54d252009-08-21 14:51:05 +0200259 cfg80211_process_rdev_events(rdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200260 rtnl_unlock();
261}
262
Johannes Berg704232c2007-04-23 12:20:05 -0700263/* exported functions */
264
David Kilroy3dcf6702009-05-16 23:13:46 +0100265struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
Johannes Berg704232c2007-04-23 12:20:05 -0700266{
Johannes Berg73810b72013-05-08 21:49:02 +0200267 static atomic_t wiphy_counter = ATOMIC_INIT(0);
Johannes Berg76232252010-10-11 14:46:52 -0400268
269 struct cfg80211_registered_device *rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700270 int alloc_size;
271
Johannes Berg0b20633d2009-07-07 03:56:13 +0200272 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
273 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
274 WARN_ON(ops->connect && !ops->disconnect);
275 WARN_ON(ops->join_ibss && !ops->leave_ibss);
276 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
277 WARN_ON(ops->add_station && !ops->del_station);
278 WARN_ON(ops->add_mpath && !ops->del_mpath);
Johannes Berg29cbe682010-12-03 09:20:44 +0100279 WARN_ON(ops->join_mesh && !ops->leave_mesh);
Johannes Berg41ade002007-12-19 02:03:29 +0100280
Johannes Berg79c97e92009-07-07 03:56:12 +0200281 alloc_size = sizeof(*rdev) + sizeof_priv;
Johannes Berg704232c2007-04-23 12:20:05 -0700282
Johannes Berg79c97e92009-07-07 03:56:12 +0200283 rdev = kzalloc(alloc_size, GFP_KERNEL);
284 if (!rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700285 return NULL;
286
Johannes Berg79c97e92009-07-07 03:56:12 +0200287 rdev->ops = ops;
Johannes Berg704232c2007-04-23 12:20:05 -0700288
Johannes Berg73810b72013-05-08 21:49:02 +0200289 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
Johannes Berga4d73ee2007-04-26 20:50:35 -0700290
Johannes Bergf4173762012-12-03 18:23:37 +0100291 if (unlikely(rdev->wiphy_idx < 0)) {
Johannes Berg76232252010-10-11 14:46:52 -0400292 /* ugh, wrapped! */
Johannes Berg73810b72013-05-08 21:49:02 +0200293 atomic_dec(&wiphy_counter);
Johannes Berg79c97e92009-07-07 03:56:12 +0200294 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700295 return NULL;
296 }
Johannes Berg704232c2007-04-23 12:20:05 -0700297
Johannes Berg9b881962013-06-04 22:23:36 +0200298 /* atomic_inc_return makes it start at 1, make it start at 0 */
299 rdev->wiphy_idx--;
300
Johannes Berg76232252010-10-11 14:46:52 -0400301 /* give it a proper name */
302 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
303
Johannes Berg89a54e42012-06-15 14:33:17 +0200304 INIT_LIST_HEAD(&rdev->wdev_list);
Ben Greear37c73b52012-10-26 14:49:25 -0700305 INIT_LIST_HEAD(&rdev->beacon_registrations);
306 spin_lock_init(&rdev->beacon_registrations_lock);
Johannes Berg79c97e92009-07-07 03:56:12 +0200307 spin_lock_init(&rdev->bss_lock);
308 INIT_LIST_HEAD(&rdev->bss_list);
309 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
Luciano Coelho807f8a82011-05-11 17:09:35 +0300310 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
Simon Wunderlich04f39042013-02-08 18:16:19 +0100311 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
312 cfg80211_dfs_channels_update_work);
Johannes Berg3d23e342009-09-29 23:27:28 +0200313#ifdef CONFIG_CFG80211_WEXT
314 rdev->wiphy.wext = &cfg80211_wext_handler;
315#endif
316
Johannes Berg79c97e92009-07-07 03:56:12 +0200317 device_initialize(&rdev->wiphy.dev);
318 rdev->wiphy.dev.class = &ieee80211_class;
319 rdev->wiphy.dev.platform_data = rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700320
Johannes Berg5be83de2009-11-19 00:56:28 +0100321#ifdef CONFIG_CFG80211_DEFAULT_PS
322 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
323#endif
Johannes Berg16cb9d42009-08-12 23:33:20 +0200324
Johannes Berg463d0182009-07-14 00:33:35 +0200325 wiphy_net_set(&rdev->wiphy, &init_net);
326
Johannes Berg79c97e92009-07-07 03:56:12 +0200327 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
328 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
329 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
330 &rdev->rfkill_ops, rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200331
Johannes Berg79c97e92009-07-07 03:56:12 +0200332 if (!rdev->rfkill) {
333 kfree(rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200334 return NULL;
335 }
336
Johannes Berg79c97e92009-07-07 03:56:12 +0200337 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
338 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
339 INIT_WORK(&rdev->event_work, cfg80211_event_work);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200340
Johannes Bergad002392009-08-18 19:51:57 +0200341 init_waitqueue_head(&rdev->dev_wait);
342
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200343 /*
344 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
345 * Fragmentation and RTS threshold are disabled by default with the
346 * special -1 value.
347 */
Johannes Berg79c97e92009-07-07 03:56:12 +0200348 rdev->wiphy.retry_short = 7;
349 rdev->wiphy.retry_long = 4;
350 rdev->wiphy.frag_threshold = (u32) -1;
351 rdev->wiphy.rts_threshold = (u32) -1;
Lukáš Turek81077e82009-12-21 22:50:47 +0100352 rdev->wiphy.coverage_class = 0;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200353
Johannes Berg79c97e92009-07-07 03:56:12 +0200354 return &rdev->wiphy;
Johannes Berg704232c2007-04-23 12:20:05 -0700355}
356EXPORT_SYMBOL(wiphy_new);
357
Johannes Berg7527a782011-05-13 10:58:57 +0200358static int wiphy_verify_combinations(struct wiphy *wiphy)
359{
360 const struct ieee80211_iface_combination *c;
361 int i, j;
362
Johannes Berg7527a782011-05-13 10:58:57 +0200363 for (i = 0; i < wiphy->n_iface_combinations; i++) {
364 u32 cnt = 0;
365 u16 all_iftypes = 0;
366
367 c = &wiphy->iface_combinations[i];
368
Simon Wunderlich11c4a072013-01-08 14:04:07 +0100369 /*
370 * Combinations with just one interface aren't real,
371 * however we make an exception for DFS.
372 */
373 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
Johannes Berg7527a782011-05-13 10:58:57 +0200374 return -EINVAL;
375
376 /* Need at least one channel */
377 if (WARN_ON(!c->num_different_channels))
378 return -EINVAL;
379
Michal Kaziord4e50c52012-06-29 12:47:07 +0200380 /*
381 * Put a sane limit on maximum number of different
382 * channels to simplify channel accounting code.
383 */
384 if (WARN_ON(c->num_different_channels >
385 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
386 return -EINVAL;
387
Simon Wunderlich11c4a072013-01-08 14:04:07 +0100388 /* DFS only works on one channel. */
389 if (WARN_ON(c->radar_detect_widths &&
390 (c->num_different_channels > 1)))
391 return -EINVAL;
392
Johannes Berg7527a782011-05-13 10:58:57 +0200393 if (WARN_ON(!c->n_limits))
394 return -EINVAL;
395
396 for (j = 0; j < c->n_limits; j++) {
397 u16 types = c->limits[j].types;
398
399 /*
400 * interface types shouldn't overlap, this is
401 * used in cfg80211_can_change_interface()
402 */
403 if (WARN_ON(types & all_iftypes))
404 return -EINVAL;
405 all_iftypes |= types;
406
407 if (WARN_ON(!c->limits[j].max))
408 return -EINVAL;
409
410 /* Shouldn't list software iftypes in combinations! */
411 if (WARN_ON(wiphy->software_iftypes & types))
412 return -EINVAL;
413
Johannes Berg98104fde2012-06-16 00:19:54 +0200414 /* Only a single P2P_DEVICE can be allowed */
415 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
416 c->limits[j].max > 1))
417 return -EINVAL;
418
Johannes Berg7527a782011-05-13 10:58:57 +0200419 cnt += c->limits[j].max;
420 /*
421 * Don't advertise an unsupported type
422 * in a combination.
423 */
424 if (WARN_ON((wiphy->interface_modes & types) != types))
425 return -EINVAL;
426 }
427
428 /* You can't even choose that many! */
429 if (WARN_ON(cnt < c->max_interfaces))
430 return -EINVAL;
431 }
432
433 return 0;
434}
435
Johannes Berg704232c2007-04-23 12:20:05 -0700436int wiphy_register(struct wiphy *wiphy)
437{
Johannes Berg79c97e92009-07-07 03:56:12 +0200438 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700439 int res;
Johannes Berg8318d782008-01-24 19:38:38 +0100440 enum ieee80211_band band;
441 struct ieee80211_supported_band *sband;
442 bool have_band = false;
443 int i;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700444 u16 ifmodes = wiphy->interface_modes;
445
Simon Wunderlichdda444d2013-11-26 16:07:26 +0100446 /*
447 * There are major locking problems in nl80211/mac80211 for CSA,
448 * disable for all drivers until this has been reworked.
449 */
450 wiphy->flags &= ~WIPHY_FLAG_HAS_CHANNEL_SWITCH;
451
Johannes Bergdfb89c52012-06-27 09:23:48 +0200452#ifdef CONFIG_PM
Johannes Berg964dc9e2013-06-03 17:25:34 +0200453 if (WARN_ON(wiphy->wowlan &&
454 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
455 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
456 return -EINVAL;
457 if (WARN_ON(wiphy->wowlan &&
458 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
459 !wiphy->wowlan->tcp))
Johannes Berg77dbbb12011-07-13 10:48:55 +0200460 return -EINVAL;
Johannes Bergdfb89c52012-06-27 09:23:48 +0200461#endif
Johannes Berg77dbbb12011-07-13 10:48:55 +0200462
Amitkumar Karwarbe29b992013-06-28 11:51:26 -0700463 if (WARN_ON(wiphy->coalesce &&
464 (!wiphy->coalesce->n_rules ||
465 !wiphy->coalesce->n_patterns) &&
466 (!wiphy->coalesce->pattern_min_len ||
467 wiphy->coalesce->pattern_min_len >
468 wiphy->coalesce->pattern_max_len)))
469 return -EINVAL;
470
Johannes Berg562a7482011-11-07 12:39:33 +0100471 if (WARN_ON(wiphy->ap_sme_capa &&
472 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
473 return -EINVAL;
474
Johannes Bergef15aac2010-01-20 12:02:33 +0100475 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
476 return -EINVAL;
477
478 if (WARN_ON(wiphy->addresses &&
479 !is_zero_ether_addr(wiphy->perm_addr) &&
480 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
481 ETH_ALEN)))
482 return -EINVAL;
483
Vasanthakumar Thiagarajan77765ea2013-01-18 11:18:45 +0530484 if (WARN_ON(wiphy->max_acl_mac_addrs &&
485 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
486 !rdev->ops->set_mac_acl)))
487 return -EINVAL;
488
Johannes Bergef15aac2010-01-20 12:02:33 +0100489 if (wiphy->addresses)
490 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
491
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700492 /* sanity check ifmodes */
493 WARN_ON(!ifmodes);
Johannes Berg2e161f72010-08-12 15:38:38 +0200494 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700495 if (WARN_ON(ifmodes != wiphy->interface_modes))
496 wiphy->interface_modes = ifmodes;
Johannes Berg8318d782008-01-24 19:38:38 +0100497
Johannes Berg7527a782011-05-13 10:58:57 +0200498 res = wiphy_verify_combinations(wiphy);
499 if (res)
500 return res;
501
Johannes Berg8318d782008-01-24 19:38:38 +0100502 /* sanity check supported bands/channels */
503 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
504 sband = wiphy->bands[band];
505 if (!sband)
506 continue;
507
508 sband->band = band;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300509 if (WARN_ON(!sband->n_channels))
510 return -EINVAL;
511 /*
512 * on 60gHz band, there are no legacy rates, so
513 * n_bitrates is 0
514 */
515 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
516 !sband->n_bitrates))
Johannes Berg8318d782008-01-24 19:38:38 +0100517 return -EINVAL;
Johannes Berg881d9482009-01-21 15:13:48 +0100518
519 /*
Amitkumar Karwar40db6c72011-04-21 14:10:27 -0700520 * Since cfg80211_disable_40mhz_24ghz is global, we can
521 * modify the sband's ht data even if the driver uses a
522 * global structure for that.
523 */
524 if (cfg80211_disable_40mhz_24ghz &&
525 band == IEEE80211_BAND_2GHZ &&
526 sband->ht_cap.ht_supported) {
527 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
528 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
529 }
530
531 /*
Johannes Berg881d9482009-01-21 15:13:48 +0100532 * Since we use a u32 for rate bitmaps in
533 * ieee80211_get_response_rate, we cannot
534 * have more than 32 legacy rates.
535 */
536 if (WARN_ON(sband->n_bitrates > 32))
537 return -EINVAL;
Johannes Berg8318d782008-01-24 19:38:38 +0100538
539 for (i = 0; i < sband->n_channels; i++) {
540 sband->channels[i].orig_flags =
541 sband->channels[i].flags;
Felix Fietkauc4a9faf2012-10-17 13:56:19 +0200542 sband->channels[i].orig_mag = INT_MAX;
Johannes Berg8318d782008-01-24 19:38:38 +0100543 sband->channels[i].orig_mpwr =
544 sband->channels[i].max_power;
545 sband->channels[i].band = band;
546 }
547
548 have_band = true;
549 }
550
551 if (!have_band) {
552 WARN_ON(1);
553 return -EINVAL;
554 }
555
Johannes Bergdfb89c52012-06-27 09:23:48 +0200556#ifdef CONFIG_PM
Johannes Berg964dc9e2013-06-03 17:25:34 +0200557 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
558 (!rdev->wiphy.wowlan->pattern_min_len ||
559 rdev->wiphy.wowlan->pattern_min_len >
560 rdev->wiphy.wowlan->pattern_max_len)))
561 return -EINVAL;
Johannes Bergdfb89c52012-06-27 09:23:48 +0200562#endif
Johannes Bergff1b6e62011-05-04 15:37:28 +0200563
Johannes Berg8318d782008-01-24 19:38:38 +0100564 /* check and set up bitrates */
565 ieee80211_set_bitrate_flags(wiphy);
566
Johannes Berg00c3a6e2013-10-26 17:14:38 +0200567 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
568
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200569 rtnl_lock();
Johannes Berg79c97e92009-07-07 03:56:12 +0200570 res = device_add(&rdev->wiphy.dev);
John W. Linvillec3d34d52010-08-30 17:36:40 -0400571 if (res) {
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200572 rtnl_unlock();
John W. Linvillec3d34d52010-08-30 17:36:40 -0400573 return res;
574 }
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200575
Johannes Berg2f0accc2009-06-10 16:50:29 +0200576 /* set up regulatory info */
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -0700577 wiphy_regulatory_register(wiphy);
Johannes Berg2f0accc2009-06-10 16:50:29 +0200578
Johannes Berg5f2aa252010-01-17 15:49:02 +0100579 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200580 cfg80211_rdev_list_generation++;
Johannes Berg704232c2007-04-23 12:20:05 -0700581
582 /* add to debugfs */
Johannes Berg79c97e92009-07-07 03:56:12 +0200583 rdev->wiphy.debugfsdir =
584 debugfs_create_dir(wiphy_name(&rdev->wiphy),
Johannes Berg704232c2007-04-23 12:20:05 -0700585 ieee80211_debugfs_dir);
Johannes Berg79c97e92009-07-07 03:56:12 +0200586 if (IS_ERR(rdev->wiphy.debugfsdir))
587 rdev->wiphy.debugfsdir = NULL;
Johannes Berg704232c2007-04-23 12:20:05 -0700588
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +0100589 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -0400590 struct regulatory_request request;
591
592 request.wiphy_idx = get_wiphy_idx(wiphy);
593 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
594 request.alpha2[0] = '9';
595 request.alpha2[1] = '9';
596
597 nl80211_send_reg_change_event(&request);
598 }
599
Johannes Berg79c97e92009-07-07 03:56:12 +0200600 cfg80211_debugfs_rdev_add(rdev);
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400601
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +0200602 rdev->wiphy.registered = true;
603 rtnl_unlock();
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200604
605 res = rfkill_register(rdev->rfkill);
606 if (res) {
607 rfkill_destroy(rdev->rfkill);
608 rdev->rfkill = NULL;
609 wiphy_unregister(&rdev->wiphy);
610 return res;
611 }
612
Johannes Berg2f0accc2009-06-10 16:50:29 +0200613 return 0;
Johannes Berg704232c2007-04-23 12:20:05 -0700614}
615EXPORT_SYMBOL(wiphy_register);
616
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200617void wiphy_rfkill_start_polling(struct wiphy *wiphy)
618{
Johannes Berg79c97e92009-07-07 03:56:12 +0200619 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200620
Johannes Berg79c97e92009-07-07 03:56:12 +0200621 if (!rdev->ops->rfkill_poll)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200622 return;
Johannes Berg79c97e92009-07-07 03:56:12 +0200623 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
624 rfkill_resume_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200625}
626EXPORT_SYMBOL(wiphy_rfkill_start_polling);
627
628void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
629{
Johannes Berg79c97e92009-07-07 03:56:12 +0200630 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200631
Johannes Berg79c97e92009-07-07 03:56:12 +0200632 rfkill_pause_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200633}
634EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
635
Johannes Berg704232c2007-04-23 12:20:05 -0700636void wiphy_unregister(struct wiphy *wiphy)
637{
Johannes Berg79c97e92009-07-07 03:56:12 +0200638 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700639
Johannes Berg5fe231e2013-05-08 21:45:15 +0200640 wait_event(rdev->dev_wait, ({
641 int __count;
642 rtnl_lock();
643 __count = rdev->opencount;
644 rtnl_unlock();
645 __count == 0; }));
646
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200647 if (rdev->rfkill)
648 rfkill_unregister(rdev->rfkill);
Johannes Berg256c90d2013-06-04 19:21:08 +0200649
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +0200650 rtnl_lock();
651 rdev->wiphy.registered = false;
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +0200652
Johannes Berg89a54e42012-06-15 14:33:17 +0200653 BUG_ON(!list_empty(&rdev->wdev_list));
Johannes Bergad002392009-08-18 19:51:57 +0200654
655 /*
656 * First remove the hardware from everywhere, this makes
657 * it impossible to find from userspace.
658 */
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100659 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100660 list_del_rcu(&rdev->list);
661 synchronize_rcu();
Johannes Bergf16bfc12007-04-26 20:51:12 -0700662
663 /*
Luis R. Rodriguezbfead082012-07-12 11:49:19 -0700664 * If this device got a regulatory hint tell core its
665 * free to listen now to a new shiny device regulatory hint
666 */
667 wiphy_regulatory_deregister(wiphy);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800668
Johannes Bergf5ea9122009-08-07 16:17:38 +0200669 cfg80211_rdev_list_generation++;
Johannes Berg79c97e92009-07-07 03:56:12 +0200670 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700671
Johannes Berg5fe231e2013-05-08 21:45:15 +0200672 rtnl_unlock();
Johannes Berg66825882009-07-13 13:24:44 +0200673
Johannes Berg36e6fea2009-08-12 22:21:21 +0200674 flush_work(&rdev->scan_done_wk);
Johannes Berg66825882009-07-13 13:24:44 +0200675 cancel_work_sync(&rdev->conn_work);
Johannes Berg66825882009-07-13 13:24:44 +0200676 flush_work(&rdev->event_work);
Simon Wunderlich04f39042013-02-08 18:16:19 +0100677 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
Johannes Berg6d525632012-04-04 15:05:25 +0200678
Johannes Berg6abb9cb2013-05-15 09:30:07 +0200679#ifdef CONFIG_PM
680 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
Hila Gonene35e4d22012-06-27 17:19:42 +0300681 rdev_set_wakeup(rdev, false);
Johannes Berg6abb9cb2013-05-15 09:30:07 +0200682#endif
Johannes Berg6d525632012-04-04 15:05:25 +0200683 cfg80211_rdev_free_wowlan(rdev);
Amitkumar Karwarbe29b992013-06-28 11:51:26 -0700684 cfg80211_rdev_free_coalesce(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700685}
686EXPORT_SYMBOL(wiphy_unregister);
687
Johannes Berg79c97e92009-07-07 03:56:12 +0200688void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700689{
Johannes Berg2a519312009-02-10 21:25:55 +0100690 struct cfg80211_internal_bss *scan, *tmp;
Ben Greear37c73b52012-10-26 14:49:25 -0700691 struct cfg80211_beacon_registration *reg, *treg;
Johannes Berg79c97e92009-07-07 03:56:12 +0200692 rfkill_destroy(rdev->rfkill);
Ben Greear37c73b52012-10-26 14:49:25 -0700693 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
694 list_del(&reg->list);
695 kfree(reg);
696 }
Johannes Berg79c97e92009-07-07 03:56:12 +0200697 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
Johannes Berg5b112d32013-02-01 01:49:58 +0100698 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
Johannes Berg79c97e92009-07-07 03:56:12 +0200699 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700700}
701
702void wiphy_free(struct wiphy *wiphy)
703{
704 put_device(&wiphy->dev);
705}
706EXPORT_SYMBOL(wiphy_free);
707
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200708void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
709{
Johannes Berg79c97e92009-07-07 03:56:12 +0200710 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200711
Johannes Berg79c97e92009-07-07 03:56:12 +0200712 if (rfkill_set_hw_state(rdev->rfkill, blocked))
713 schedule_work(&rdev->rfkill_sync);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200714}
715EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
716
Johannes Berg98104fde2012-06-16 00:19:54 +0200717void cfg80211_unregister_wdev(struct wireless_dev *wdev)
718{
719 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
720
721 ASSERT_RTNL();
722
723 if (WARN_ON(wdev->netdev))
724 return;
725
Johannes Berg98104fde2012-06-16 00:19:54 +0200726 list_del_rcu(&wdev->list);
727 rdev->devlist_generation++;
728
729 switch (wdev->iftype) {
730 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf9f47522013-03-19 15:04:07 +0100731 cfg80211_stop_p2p_device(rdev, wdev);
Johannes Berg98104fde2012-06-16 00:19:54 +0200732 break;
733 default:
734 WARN_ON_ONCE(1);
735 break;
736 }
Johannes Berg98104fde2012-06-16 00:19:54 +0200737}
738EXPORT_SYMBOL(cfg80211_unregister_wdev);
739
Johannes Bergf1e3d552014-01-21 00:00:56 +0100740static const struct device_type wiphy_type = {
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000741 .name = "wlan",
742};
743
Michal Kaziordbbae262012-06-29 12:47:01 +0200744void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
745 enum nl80211_iftype iftype, int num)
746{
Johannes Bergc5a7e582012-07-04 13:28:18 +0200747 ASSERT_RTNL();
Michal Kaziordbbae262012-06-29 12:47:01 +0200748
749 rdev->num_running_ifaces += num;
750 if (iftype == NL80211_IFTYPE_MONITOR)
751 rdev->num_running_monitor_ifaces += num;
Michal Kaziordbbae262012-06-29 12:47:01 +0200752}
753
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100754void cfg80211_leave(struct cfg80211_registered_device *rdev,
Johannes Berg5fe231e2013-05-08 21:45:15 +0200755 struct wireless_dev *wdev)
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100756{
757 struct net_device *dev = wdev->netdev;
758
Barak Bercovitz24d584d2013-12-05 11:21:26 +0200759 ASSERT_RTNL();
760
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100761 switch (wdev->iftype) {
762 case NL80211_IFTYPE_ADHOC:
763 cfg80211_leave_ibss(rdev, dev, true);
764 break;
765 case NL80211_IFTYPE_P2P_CLIENT:
766 case NL80211_IFTYPE_STATION:
Barak Bercovitz24d584d2013-12-05 11:21:26 +0200767 if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev)
768 __cfg80211_stop_sched_scan(rdev, false);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100769
770 wdev_lock(wdev);
771#ifdef CONFIG_CFG80211_WEXT
772 kfree(wdev->wext.ie);
773 wdev->wext.ie = NULL;
774 wdev->wext.ie_len = 0;
775 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
776#endif
Johannes Berg83739b02013-05-15 17:44:01 +0200777 cfg80211_disconnect(rdev, dev,
778 WLAN_REASON_DEAUTH_LEAVING, true);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100779 wdev_unlock(wdev);
780 break;
781 case NL80211_IFTYPE_MESH_POINT:
782 cfg80211_leave_mesh(rdev, dev);
783 break;
784 case NL80211_IFTYPE_AP:
Johannes Berg74418ed2013-07-30 10:11:25 +0200785 case NL80211_IFTYPE_P2P_GO:
Ilan Peer7c8d5e02014-02-25 15:33:38 +0200786 cfg80211_stop_ap(rdev, dev, true);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100787 break;
788 default:
789 break;
790 }
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100791}
792
Cristian Chilipireac4f60842012-05-08 12:38:53 +0300793static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
Jiri Pirko351638e2013-05-28 01:30:21 +0000794 unsigned long state, void *ptr)
Johannes Berg704232c2007-04-23 12:20:05 -0700795{
Jiri Pirko351638e2013-05-28 01:30:21 +0000796 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Johannes Berg2a783c12009-07-01 21:26:45 +0200797 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg704232c2007-04-23 12:20:05 -0700798 struct cfg80211_registered_device *rdev;
Johannes Berg7527a782011-05-13 10:58:57 +0200799 int ret;
Johannes Berg704232c2007-04-23 12:20:05 -0700800
Johannes Berg2a783c12009-07-01 21:26:45 +0200801 if (!wdev)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200802 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700803
Johannes Berg2a783c12009-07-01 21:26:45 +0200804 rdev = wiphy_to_dev(wdev->wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700805
Johannes Berg2a783c12009-07-01 21:26:45 +0200806 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
Johannes Berg60719ff2008-09-16 14:55:09 +0200807
Johannes Berg704232c2007-04-23 12:20:05 -0700808 switch (state) {
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000809 case NETDEV_POST_INIT:
810 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
811 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700812 case NETDEV_REGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200813 /*
814 * NB: cannot take rdev->mtx here because this may be
815 * called within code protected by it when interfaces
816 * are added with nl80211.
817 */
Johannes Berg667503dd2009-07-07 03:56:11 +0200818 mutex_init(&wdev->mtx);
819 INIT_LIST_HEAD(&wdev->event_list);
820 spin_lock_init(&wdev->event_lock);
Johannes Berg2e161f72010-08-12 15:38:38 +0200821 INIT_LIST_HEAD(&wdev->mgmt_registrations);
822 spin_lock_init(&wdev->mgmt_registrations_lock);
Jouni Malinen026331c2010-02-15 12:53:10 +0200823
Johannes Berg89a54e42012-06-15 14:33:17 +0200824 wdev->identifier = ++rdev->wdev_id;
825 list_add_rcu(&wdev->list, &rdev->wdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200826 rdev->devlist_generation++;
Johannes Berg463d0182009-07-14 00:33:35 +0200827 /* can only change netns with wiphy */
828 dev->features |= NETIF_F_NETNS_LOCAL;
829
Johannes Berg704232c2007-04-23 12:20:05 -0700830 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
831 "phy80211")) {
Joe Perchese9c02682010-11-16 19:56:49 -0800832 pr_err("failed to add phy80211 symlink to netdev!\n");
Johannes Berg704232c2007-04-23 12:20:05 -0700833 }
Johannes Berg2a783c12009-07-01 21:26:45 +0200834 wdev->netdev = dev;
Johannes Berg3d23e342009-09-29 23:27:28 +0200835#ifdef CONFIG_CFG80211_WEXT
Johannes Berg2a783c12009-07-01 21:26:45 +0200836 wdev->wext.default_key = -1;
837 wdev->wext.default_mgmt_key = -1;
Johannes Bergf2129352009-07-01 21:26:56 +0200838 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Kalle Valoffb9eb32010-02-17 17:58:10 +0200839#endif
840
Johannes Berg5be83de2009-11-19 00:56:28 +0100841 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
Kalle Valoffb9eb32010-02-17 17:58:10 +0200842 wdev->ps = true;
Johannes Berg5be83de2009-11-19 00:56:28 +0100843 else
Kalle Valoffb9eb32010-02-17 17:58:10 +0200844 wdev->ps = false;
Juuso Oikarinen9043f3b2010-04-27 12:47:41 +0300845 /* allow mac80211 to determine the timeout */
846 wdev->ps_timeout = -1;
Kalle Valoffb9eb32010-02-17 17:58:10 +0200847
Stanislaw Gruszkad07d7502013-01-10 23:19:10 +0000848 netdev_set_default_ethtool_ops(dev, &cfg80211_ethtool_ops);
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100849
850 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
Johannes Berg074ac8d2010-09-16 14:58:22 +0200851 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100852 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
853 dev->priv_flags |= IFF_DONT_BRIDGE;
Johannes Berg704232c2007-04-23 12:20:05 -0700854 break;
Johannes Berg04a773a2009-04-19 21:24:32 +0200855 case NETDEV_GOING_DOWN:
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100856 cfg80211_leave(rdev, wdev);
Johannes Berg01a0ac42009-08-20 21:36:16 +0200857 break;
858 case NETDEV_DOWN:
Michal Kaziordbbae262012-06-29 12:47:01 +0200859 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
Johannes Berga6173022014-01-22 11:14:18 +0200860 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
861 if (WARN_ON(!rdev->scan_req->notified))
862 rdev->scan_req->aborted = true;
Johannes Bergf9d15d12014-01-22 11:14:19 +0200863 ___cfg80211_scan_done(rdev, false);
Johannes Berga6173022014-01-22 11:14:18 +0200864 }
Johannes Berg5fe231e2013-05-08 21:45:15 +0200865
866 if (WARN_ON(rdev->sched_scan_req &&
867 rdev->sched_scan_req->dev == wdev->netdev)) {
868 __cfg80211_stop_sched_scan(rdev, false);
869 }
870
871 rdev->opencount--;
872 wake_up(&rdev->dev_wait);
Johannes Berg04a773a2009-04-19 21:24:32 +0200873 break;
874 case NETDEV_UP:
Johannes Berg4290cb42012-07-12 22:19:48 +0200875 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
Johannes Berg667503dd2009-07-07 03:56:11 +0200876 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200877 switch (wdev->iftype) {
Johannes Berg29cbe682010-12-03 09:20:44 +0100878#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +0200879 case NL80211_IFTYPE_ADHOC:
Johannes Bergfffd0932009-07-08 14:22:54 +0200880 cfg80211_ibss_wext_join(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200881 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200882 case NL80211_IFTYPE_STATION:
Johannes Bergfffd0932009-07-08 14:22:54 +0200883 cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200884 break;
Johannes Berg29cbe682010-12-03 09:20:44 +0100885#endif
Javier Cardonac80d5452010-12-16 17:37:49 -0800886#ifdef CONFIG_MAC80211_MESH
Johannes Berg29cbe682010-12-03 09:20:44 +0100887 case NL80211_IFTYPE_MESH_POINT:
Javier Cardonac80d5452010-12-16 17:37:49 -0800888 {
889 /* backward compat code... */
890 struct mesh_setup setup;
891 memcpy(&setup, &default_mesh_setup,
892 sizeof(setup));
893 /* back compat only needed for mesh_id */
894 setup.mesh_id = wdev->ssid;
895 setup.mesh_id_len = wdev->mesh_id_up_len;
896 if (wdev->mesh_id_up_len)
897 __cfg80211_join_mesh(rdev, dev,
898 &setup,
899 &default_mesh_config);
900 break;
901 }
902#endif
Johannes Bergf2129352009-07-01 21:26:56 +0200903 default:
904 break;
905 }
Johannes Berg667503dd2009-07-07 03:56:11 +0200906 wdev_unlock(wdev);
Johannes Bergad002392009-08-18 19:51:57 +0200907 rdev->opencount++;
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +0200908
909 /*
910 * Configure power management to the driver here so that its
911 * correctly set also after interface type changes etc.
912 */
Eliad Peller5966f2d2011-07-19 12:57:13 +0300913 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
914 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +0200915 rdev->ops->set_power_mgmt)
Hila Gonene35e4d22012-06-27 17:19:42 +0300916 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
917 wdev->ps_timeout)) {
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +0200918 /* assume this means it's off */
919 wdev->ps = false;
920 }
Johannes Berg2a783c12009-07-01 21:26:45 +0200921 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700922 case NETDEV_UNREGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200923 /*
Johannes Berge40cbdac2009-07-30 14:04:01 +0200924 * It is possible to get NETDEV_UNREGISTER
925 * multiple times. To detect that, check
926 * that the interface is still on the list
927 * of registered interfaces, and only then
928 * remove and clean it up.
929 */
Johannes Berg2a783c12009-07-01 21:26:45 +0200930 if (!list_empty(&wdev->list)) {
Johannes Berg704232c2007-04-23 12:20:05 -0700931 sysfs_remove_link(&dev->dev.kobj, "phy80211");
Johannes Berg5f2aa252010-01-17 15:49:02 +0100932 list_del_rcu(&wdev->list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200933 rdev->devlist_generation++;
Johannes Berg2e161f72010-08-12 15:38:38 +0200934 cfg80211_mlme_purge_registrations(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200935#ifdef CONFIG_CFG80211_WEXT
Johannes Berge40cbdac2009-07-30 14:04:01 +0200936 kfree(wdev->wext.keys);
937#endif
Johannes Berg704232c2007-04-23 12:20:05 -0700938 }
Johannes Berg5f2aa252010-01-17 15:49:02 +0100939 /*
940 * synchronise (so that we won't find this netdev
941 * from other code any more) and then clear the list
942 * head so that the above code can safely check for
943 * !list_empty() to avoid double-cleanup.
944 */
945 synchronize_rcu();
946 INIT_LIST_HEAD(&wdev->list);
Daniel Drake1f6fc432012-08-02 18:41:48 +0100947 /*
948 * Ensure that all events have been processed and
949 * freed.
950 */
951 cfg80211_process_wdev_events(wdev);
Ben Greearf9bef3d2013-06-19 14:06:26 -0700952
953 if (WARN_ON(wdev->current_bss)) {
954 cfg80211_unhold_bss(wdev->current_bss);
955 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
956 wdev->current_bss = NULL;
957 }
Johannes Berg704232c2007-04-23 12:20:05 -0700958 break;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200959 case NETDEV_PRE_UP:
Johannes Berg0b20633d2009-07-07 03:56:13 +0200960 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
961 return notifier_from_errno(-EOPNOTSUPP);
Johannes Berg7527a782011-05-13 10:58:57 +0200962 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
963 if (ret)
964 return notifier_from_errno(ret);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200965 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700966 }
967
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200968 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700969}
970
971static struct notifier_block cfg80211_netdev_notifier = {
972 .notifier_call = cfg80211_netdev_notifier_call,
973};
974
Johannes Berg463d0182009-07-14 00:33:35 +0200975static void __net_exit cfg80211_pernet_exit(struct net *net)
976{
977 struct cfg80211_registered_device *rdev;
978
979 rtnl_lock();
Johannes Berg463d0182009-07-14 00:33:35 +0200980 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
981 if (net_eq(wiphy_net(&rdev->wiphy), net))
982 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
983 }
Johannes Berg463d0182009-07-14 00:33:35 +0200984 rtnl_unlock();
985}
986
987static struct pernet_operations cfg80211_pernet_ops = {
988 .exit = cfg80211_pernet_exit,
989};
990
991static int __init cfg80211_init(void)
Johannes Berg704232c2007-04-23 12:20:05 -0700992{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700993 int err;
994
Johannes Berg463d0182009-07-14 00:33:35 +0200995 err = register_pernet_device(&cfg80211_pernet_ops);
996 if (err)
997 goto out_fail_pernet;
998
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700999 err = wiphy_sysfs_init();
Johannes Berg704232c2007-04-23 12:20:05 -07001000 if (err)
1001 goto out_fail_sysfs;
1002
1003 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1004 if (err)
1005 goto out_fail_notifier;
1006
Johannes Berg55682962007-09-20 13:09:35 -04001007 err = nl80211_init();
1008 if (err)
1009 goto out_fail_nl80211;
1010
Johannes Berg704232c2007-04-23 12:20:05 -07001011 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1012
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001013 err = regulatory_init();
1014 if (err)
1015 goto out_fail_reg;
1016
Alban Browaeyse60d7442009-11-25 15:13:00 +01001017 cfg80211_wq = create_singlethread_workqueue("cfg80211");
Wei Yongjunf00f1882013-03-20 20:22:54 +08001018 if (!cfg80211_wq) {
1019 err = -ENOMEM;
Alban Browaeyse60d7442009-11-25 15:13:00 +01001020 goto out_fail_wq;
Wei Yongjunf00f1882013-03-20 20:22:54 +08001021 }
Alban Browaeyse60d7442009-11-25 15:13:00 +01001022
Johannes Berg704232c2007-04-23 12:20:05 -07001023 return 0;
1024
Alban Browaeyse60d7442009-11-25 15:13:00 +01001025out_fail_wq:
1026 regulatory_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001027out_fail_reg:
1028 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -04001029out_fail_nl80211:
1030 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
Johannes Berg704232c2007-04-23 12:20:05 -07001031out_fail_notifier:
1032 wiphy_sysfs_exit();
1033out_fail_sysfs:
Johannes Berg463d0182009-07-14 00:33:35 +02001034 unregister_pernet_device(&cfg80211_pernet_ops);
1035out_fail_pernet:
Johannes Berg704232c2007-04-23 12:20:05 -07001036 return err;
1037}
Johannes Berg3a462462007-09-10 13:44:45 +02001038subsys_initcall(cfg80211_init);
Johannes Berg704232c2007-04-23 12:20:05 -07001039
Uwe Kleine-Königf884e382010-06-18 09:38:54 +02001040static void __exit cfg80211_exit(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001041{
1042 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -04001043 nl80211_exit();
Johannes Berg704232c2007-04-23 12:20:05 -07001044 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1045 wiphy_sysfs_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001046 regulatory_exit();
Johannes Berg463d0182009-07-14 00:33:35 +02001047 unregister_pernet_device(&cfg80211_pernet_ops);
Alban Browaeyse60d7442009-11-25 15:13:00 +01001048 destroy_workqueue(cfg80211_wq);
Johannes Berg704232c2007-04-23 12:20:05 -07001049}
1050module_exit(cfg80211_exit);