blob: 880dbe2e6f94979847df154fb0a35e4ed964df69 [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"
Johannes Berg704232c2007-04-23 12:20:05 -070029
30/* name for sysfs, %d is appended */
31#define PHY_NAME "phy"
32
33MODULE_AUTHOR("Johannes Berg");
34MODULE_LICENSE("GPL");
35MODULE_DESCRIPTION("wireless configuration support");
36
Johannes Berg5f2aa252010-01-17 15:49:02 +010037/* RCU-protected (and cfg80211_mutex for writers) */
Johannes Berg79c97e92009-07-07 03:56:12 +020038LIST_HEAD(cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +020039int cfg80211_rdev_list_generation;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050040
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050041DEFINE_MUTEX(cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -070042
43/* 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
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050054/* requires cfg80211_mutex to be held! */
Johannes Berg79c97e92009-07-07 03:56:12 +020055struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
Johannes Berg55682962007-09-20 13:09:35 -040056{
Johannes Berg79c97e92009-07-07 03:56:12 +020057 struct cfg80211_registered_device *result = NULL, *rdev;
Johannes Berg55682962007-09-20 13:09:35 -040058
Luis R. Rodriguez85fd1292009-02-21 00:04:20 -050059 if (!wiphy_idx_valid(wiphy_idx))
60 return NULL;
61
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -050062 assert_cfg80211_lock();
63
Johannes Berg79c97e92009-07-07 03:56:12 +020064 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
65 if (rdev->wiphy_idx == wiphy_idx) {
66 result = rdev;
Johannes Berg55682962007-09-20 13:09:35 -040067 break;
68 }
69 }
70
71 return result;
72}
73
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050074int get_wiphy_idx(struct wiphy *wiphy)
75{
Johannes Berg79c97e92009-07-07 03:56:12 +020076 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050077 if (!wiphy)
78 return WIPHY_IDX_STALE;
Johannes Berg79c97e92009-07-07 03:56:12 +020079 rdev = wiphy_to_dev(wiphy);
80 return rdev->wiphy_idx;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050081}
82
Johannes Berg79c97e92009-07-07 03:56:12 +020083/* requires cfg80211_rdev_mutex to be held! */
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050084struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
85{
Johannes Berg79c97e92009-07-07 03:56:12 +020086 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050087
88 if (!wiphy_idx_valid(wiphy_idx))
89 return NULL;
90
91 assert_cfg80211_lock();
92
Johannes Berg79c97e92009-07-07 03:56:12 +020093 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
94 if (!rdev)
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050095 return NULL;
Johannes Berg79c97e92009-07-07 03:56:12 +020096 return &rdev->wiphy;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050097}
98
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050099/* requires cfg80211_mutex to be held! */
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100100struct cfg80211_registered_device *
Johannes Berg79c97e92009-07-07 03:56:12 +0200101__cfg80211_rdev_from_info(struct genl_info *info)
Johannes Berg55682962007-09-20 13:09:35 -0400102{
103 int ifindex;
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500104 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
Johannes Berg55682962007-09-20 13:09:35 -0400105 struct net_device *dev;
106 int err = -EINVAL;
107
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500108 assert_cfg80211_lock();
109
Johannes Berg55682962007-09-20 13:09:35 -0400110 if (info->attrs[NL80211_ATTR_WIPHY]) {
Johannes Berg79c97e92009-07-07 03:56:12 +0200111 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
Johannes Berg55682962007-09-20 13:09:35 -0400112 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
113 err = -ENODEV;
114 }
115
116 if (info->attrs[NL80211_ATTR_IFINDEX]) {
117 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
Johannes Berg463d0182009-07-14 00:33:35 +0200118 dev = dev_get_by_index(genl_info_net(info), ifindex);
Johannes Berg55682962007-09-20 13:09:35 -0400119 if (dev) {
120 if (dev->ieee80211_ptr)
121 byifidx =
122 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
123 dev_put(dev);
124 }
125 err = -ENODEV;
126 }
127
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500128 if (bywiphyidx && byifidx) {
129 if (bywiphyidx != byifidx)
Johannes Berg55682962007-09-20 13:09:35 -0400130 return ERR_PTR(-EINVAL);
131 else
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500132 return bywiphyidx; /* == byifidx */
Johannes Berg55682962007-09-20 13:09:35 -0400133 }
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500134 if (bywiphyidx)
135 return bywiphyidx;
Johannes Berg55682962007-09-20 13:09:35 -0400136
137 if (byifidx)
138 return byifidx;
139
140 return ERR_PTR(err);
141}
142
143struct cfg80211_registered_device *
144cfg80211_get_dev_from_info(struct genl_info *info)
145{
Johannes Berg79c97e92009-07-07 03:56:12 +0200146 struct cfg80211_registered_device *rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400147
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500148 mutex_lock(&cfg80211_mutex);
Johannes Berg79c97e92009-07-07 03:56:12 +0200149 rdev = __cfg80211_rdev_from_info(info);
Johannes Berg55682962007-09-20 13:09:35 -0400150
151 /* if it is not an error we grab the lock on
152 * it to assure it won't be going away while
153 * we operate on it */
Johannes Berg79c97e92009-07-07 03:56:12 +0200154 if (!IS_ERR(rdev))
155 mutex_lock(&rdev->mtx);
Johannes Berg55682962007-09-20 13:09:35 -0400156
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500157 mutex_unlock(&cfg80211_mutex);
Johannes Berg55682962007-09-20 13:09:35 -0400158
Johannes Berg79c97e92009-07-07 03:56:12 +0200159 return rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400160}
161
162struct cfg80211_registered_device *
Johannes Berg463d0182009-07-14 00:33:35 +0200163cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
Johannes Berg55682962007-09-20 13:09:35 -0400164{
Johannes Berg79c97e92009-07-07 03:56:12 +0200165 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
Johannes Berg55682962007-09-20 13:09:35 -0400166 struct net_device *dev;
167
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500168 mutex_lock(&cfg80211_mutex);
Johannes Berg463d0182009-07-14 00:33:35 +0200169 dev = dev_get_by_index(net, ifindex);
Johannes Berg55682962007-09-20 13:09:35 -0400170 if (!dev)
171 goto out;
172 if (dev->ieee80211_ptr) {
Johannes Berg79c97e92009-07-07 03:56:12 +0200173 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
174 mutex_lock(&rdev->mtx);
Johannes Berg55682962007-09-20 13:09:35 -0400175 } else
Johannes Berg79c97e92009-07-07 03:56:12 +0200176 rdev = ERR_PTR(-ENODEV);
Johannes Berg55682962007-09-20 13:09:35 -0400177 dev_put(dev);
178 out:
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500179 mutex_unlock(&cfg80211_mutex);
Johannes Berg79c97e92009-07-07 03:56:12 +0200180 return rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400181}
182
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100183/* requires cfg80211_mutex to be held */
Johannes Berg55682962007-09-20 13:09:35 -0400184int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
185 char *newname)
186{
Johannes Berg79c97e92009-07-07 03:56:12 +0200187 struct cfg80211_registered_device *rdev2;
Johannes Berg76232252010-10-11 14:46:52 -0400188 int wiphy_idx, taken = -1, result, digits;
Johannes Berg55682962007-09-20 13:09:35 -0400189
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100190 assert_cfg80211_lock();
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700191
Johannes Berg76232252010-10-11 14:46:52 -0400192 /* prohibit calling the thing phy%d when %d is not its number */
193 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
194 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
195 /* count number of places needed to print wiphy_idx */
196 digits = 1;
197 while (wiphy_idx /= 10)
198 digits++;
199 /*
200 * deny the name if it is phy<idx> where <idx> is printed
201 * without leading zeroes. taken == strlen(newname) here
202 */
203 if (taken == strlen(PHY_NAME) + digits)
204 return -EINVAL;
205 }
206
207
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700208 /* Ignore nop renames */
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700209 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100210 return 0;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700211
212 /* Ensure another device does not already have this name. */
Johannes Berg79c97e92009-07-07 03:56:12 +0200213 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
214 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
Johannes Berg76232252010-10-11 14:46:52 -0400215 return -EINVAL;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700216
Johannes Berg55682962007-09-20 13:09:35 -0400217 result = device_rename(&rdev->wiphy.dev, newname);
218 if (result)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100219 return result;
Johannes Berg55682962007-09-20 13:09:35 -0400220
Johannes Berg33c03602008-10-08 10:23:48 +0200221 if (rdev->wiphy.debugfsdir &&
222 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
Johannes Berg55682962007-09-20 13:09:35 -0400223 rdev->wiphy.debugfsdir,
224 rdev->wiphy.debugfsdir->d_parent,
225 newname))
Joe Perchese9c02682010-11-16 19:56:49 -0800226 pr_err("failed to rename debugfs dir to %s!\n", newname);
Johannes Berg55682962007-09-20 13:09:35 -0400227
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100228 nl80211_notify_dev_rename(rdev);
Johannes Berg55682962007-09-20 13:09:35 -0400229
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100230 return 0;
Johannes Berg55682962007-09-20 13:09:35 -0400231}
232
Johannes Berg463d0182009-07-14 00:33:35 +0200233int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
234 struct net *net)
235{
236 struct wireless_dev *wdev;
237 int err = 0;
238
Johannes Berg5be83de2009-11-19 00:56:28 +0100239 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
Johannes Berg463d0182009-07-14 00:33:35 +0200240 return -EOPNOTSUPP;
241
242 list_for_each_entry(wdev, &rdev->netdev_list, list) {
243 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
244 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
245 if (err)
246 break;
247 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
248 }
249
250 if (err) {
251 /* failed -- clean up to old netns */
252 net = wiphy_net(&rdev->wiphy);
253
254 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
255 list) {
256 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
257 err = dev_change_net_namespace(wdev->netdev, net,
258 "wlan%d");
259 WARN_ON(err);
260 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
261 }
Johannes Berg04600792010-08-05 17:45:15 +0200262
263 return err;
Johannes Berg463d0182009-07-14 00:33:35 +0200264 }
265
266 wiphy_net_set(&rdev->wiphy, net);
267
Johannes Berg04600792010-08-05 17:45:15 +0200268 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
269 WARN_ON(err);
270
271 return 0;
Johannes Berg463d0182009-07-14 00:33:35 +0200272}
273
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200274static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
275{
Johannes Berg79c97e92009-07-07 03:56:12 +0200276 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200277
Johannes Berg79c97e92009-07-07 03:56:12 +0200278 rdev->ops->rfkill_poll(&rdev->wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200279}
280
281static int cfg80211_rfkill_set_block(void *data, bool blocked)
282{
Johannes Berg79c97e92009-07-07 03:56:12 +0200283 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200284 struct wireless_dev *wdev;
285
286 if (!blocked)
287 return 0;
288
289 rtnl_lock();
Johannes Berg79c97e92009-07-07 03:56:12 +0200290 mutex_lock(&rdev->devlist_mtx);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200291
Johannes Berg79c97e92009-07-07 03:56:12 +0200292 list_for_each_entry(wdev, &rdev->netdev_list, list)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200293 dev_close(wdev->netdev);
294
Johannes Berg79c97e92009-07-07 03:56:12 +0200295 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200296 rtnl_unlock();
297
298 return 0;
299}
300
301static void cfg80211_rfkill_sync_work(struct work_struct *work)
302{
Johannes Berg79c97e92009-07-07 03:56:12 +0200303 struct cfg80211_registered_device *rdev;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200304
Johannes Berg79c97e92009-07-07 03:56:12 +0200305 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
306 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200307}
308
Johannes Berg667503d2009-07-07 03:56:11 +0200309static void cfg80211_event_work(struct work_struct *work)
310{
311 struct cfg80211_registered_device *rdev;
Johannes Berg667503d2009-07-07 03:56:11 +0200312
313 rdev = container_of(work, struct cfg80211_registered_device,
314 event_work);
315
316 rtnl_lock();
317 cfg80211_lock_rdev(rdev);
Johannes Berg667503d2009-07-07 03:56:11 +0200318
Johannes Berg3d54d252009-08-21 14:51:05 +0200319 cfg80211_process_rdev_events(rdev);
Johannes Berg667503d2009-07-07 03:56:11 +0200320 cfg80211_unlock_rdev(rdev);
321 rtnl_unlock();
322}
323
Johannes Berg704232c2007-04-23 12:20:05 -0700324/* exported functions */
325
David Kilroy3dcf6702009-05-16 23:13:46 +0100326struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
Johannes Berg704232c2007-04-23 12:20:05 -0700327{
Denis ChengRq638af072008-09-23 02:35:37 +0800328 static int wiphy_counter;
Johannes Berg76232252010-10-11 14:46:52 -0400329
330 struct cfg80211_registered_device *rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700331 int alloc_size;
332
Johannes Berg0b20633d2009-07-07 03:56:13 +0200333 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
334 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
335 WARN_ON(ops->connect && !ops->disconnect);
336 WARN_ON(ops->join_ibss && !ops->leave_ibss);
337 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
338 WARN_ON(ops->add_station && !ops->del_station);
339 WARN_ON(ops->add_mpath && !ops->del_mpath);
Johannes Berg29cbe682010-12-03 09:20:44 +0100340 WARN_ON(ops->join_mesh && !ops->leave_mesh);
Johannes Berg41ade002007-12-19 02:03:29 +0100341
Johannes Berg79c97e92009-07-07 03:56:12 +0200342 alloc_size = sizeof(*rdev) + sizeof_priv;
Johannes Berg704232c2007-04-23 12:20:05 -0700343
Johannes Berg79c97e92009-07-07 03:56:12 +0200344 rdev = kzalloc(alloc_size, GFP_KERNEL);
345 if (!rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700346 return NULL;
347
Johannes Berg79c97e92009-07-07 03:56:12 +0200348 rdev->ops = ops;
Johannes Berg704232c2007-04-23 12:20:05 -0700349
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500350 mutex_lock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700351
Johannes Berg79c97e92009-07-07 03:56:12 +0200352 rdev->wiphy_idx = wiphy_counter++;
Johannes Berga4d73ee2007-04-26 20:50:35 -0700353
Johannes Berg79c97e92009-07-07 03:56:12 +0200354 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
Denis ChengRq638af072008-09-23 02:35:37 +0800355 wiphy_counter--;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500356 mutex_unlock(&cfg80211_mutex);
Johannes Berg76232252010-10-11 14:46:52 -0400357 /* ugh, wrapped! */
Johannes Berg79c97e92009-07-07 03:56:12 +0200358 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700359 return NULL;
360 }
Johannes Berg704232c2007-04-23 12:20:05 -0700361
Ben Greear5a254ff2010-09-27 09:07:26 -0700362 mutex_unlock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700363
Johannes Berg76232252010-10-11 14:46:52 -0400364 /* give it a proper name */
365 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
366
Johannes Berg79c97e92009-07-07 03:56:12 +0200367 mutex_init(&rdev->mtx);
368 mutex_init(&rdev->devlist_mtx);
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300369 mutex_init(&rdev->sched_scan_mtx);
Johannes Berg79c97e92009-07-07 03:56:12 +0200370 INIT_LIST_HEAD(&rdev->netdev_list);
371 spin_lock_init(&rdev->bss_lock);
372 INIT_LIST_HEAD(&rdev->bss_list);
373 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
Luciano Coelho807f8a82011-05-11 17:09:35 +0300374 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
Johannes Berg3d23e342009-09-29 23:27:28 +0200375#ifdef CONFIG_CFG80211_WEXT
376 rdev->wiphy.wext = &cfg80211_wext_handler;
377#endif
378
Johannes Berg79c97e92009-07-07 03:56:12 +0200379 device_initialize(&rdev->wiphy.dev);
380 rdev->wiphy.dev.class = &ieee80211_class;
381 rdev->wiphy.dev.platform_data = rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700382
Johannes Berg5be83de2009-11-19 00:56:28 +0100383#ifdef CONFIG_CFG80211_DEFAULT_PS
384 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
385#endif
Johannes Berg16cb9d42009-08-12 23:33:20 +0200386
Johannes Berg463d0182009-07-14 00:33:35 +0200387 wiphy_net_set(&rdev->wiphy, &init_net);
388
Johannes Berg79c97e92009-07-07 03:56:12 +0200389 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
390 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
391 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
392 &rdev->rfkill_ops, rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200393
Johannes Berg79c97e92009-07-07 03:56:12 +0200394 if (!rdev->rfkill) {
395 kfree(rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200396 return NULL;
397 }
398
Johannes Berg79c97e92009-07-07 03:56:12 +0200399 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
400 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
401 INIT_WORK(&rdev->event_work, cfg80211_event_work);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200402
Johannes Bergad002392009-08-18 19:51:57 +0200403 init_waitqueue_head(&rdev->dev_wait);
404
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200405 /*
406 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
407 * Fragmentation and RTS threshold are disabled by default with the
408 * special -1 value.
409 */
Johannes Berg79c97e92009-07-07 03:56:12 +0200410 rdev->wiphy.retry_short = 7;
411 rdev->wiphy.retry_long = 4;
412 rdev->wiphy.frag_threshold = (u32) -1;
413 rdev->wiphy.rts_threshold = (u32) -1;
Lukáš Turek81077e82009-12-21 22:50:47 +0100414 rdev->wiphy.coverage_class = 0;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200415
Johannes Berg79c97e92009-07-07 03:56:12 +0200416 return &rdev->wiphy;
Johannes Berg704232c2007-04-23 12:20:05 -0700417}
418EXPORT_SYMBOL(wiphy_new);
419
Johannes Berg7527a782011-05-13 10:58:57 +0200420static int wiphy_verify_combinations(struct wiphy *wiphy)
421{
422 const struct ieee80211_iface_combination *c;
423 int i, j;
424
425 /* If we have combinations enforce them */
426 if (wiphy->n_iface_combinations)
427 wiphy->flags |= WIPHY_FLAG_ENFORCE_COMBINATIONS;
428
429 for (i = 0; i < wiphy->n_iface_combinations; i++) {
430 u32 cnt = 0;
431 u16 all_iftypes = 0;
432
433 c = &wiphy->iface_combinations[i];
434
435 /* Combinations with just one interface aren't real */
436 if (WARN_ON(c->max_interfaces < 2))
437 return -EINVAL;
438
439 /* Need at least one channel */
440 if (WARN_ON(!c->num_different_channels))
441 return -EINVAL;
442
443 if (WARN_ON(!c->n_limits))
444 return -EINVAL;
445
446 for (j = 0; j < c->n_limits; j++) {
447 u16 types = c->limits[j].types;
448
449 /*
450 * interface types shouldn't overlap, this is
451 * used in cfg80211_can_change_interface()
452 */
453 if (WARN_ON(types & all_iftypes))
454 return -EINVAL;
455 all_iftypes |= types;
456
457 if (WARN_ON(!c->limits[j].max))
458 return -EINVAL;
459
460 /* Shouldn't list software iftypes in combinations! */
461 if (WARN_ON(wiphy->software_iftypes & types))
462 return -EINVAL;
463
464 cnt += c->limits[j].max;
465 /*
466 * Don't advertise an unsupported type
467 * in a combination.
468 */
469 if (WARN_ON((wiphy->interface_modes & types) != types))
470 return -EINVAL;
471 }
472
473 /* You can't even choose that many! */
474 if (WARN_ON(cnt < c->max_interfaces))
475 return -EINVAL;
476 }
477
478 return 0;
479}
480
Johannes Berg704232c2007-04-23 12:20:05 -0700481int wiphy_register(struct wiphy *wiphy)
482{
Johannes Berg79c97e92009-07-07 03:56:12 +0200483 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700484 int res;
Johannes Berg8318d782008-01-24 19:38:38 +0100485 enum ieee80211_band band;
486 struct ieee80211_supported_band *sband;
487 bool have_band = false;
488 int i;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700489 u16 ifmodes = wiphy->interface_modes;
490
Johannes Bergef15aac2010-01-20 12:02:33 +0100491 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
492 return -EINVAL;
493
494 if (WARN_ON(wiphy->addresses &&
495 !is_zero_ether_addr(wiphy->perm_addr) &&
496 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
497 ETH_ALEN)))
498 return -EINVAL;
499
500 if (wiphy->addresses)
501 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
502
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700503 /* sanity check ifmodes */
504 WARN_ON(!ifmodes);
Johannes Berg2e161f782010-08-12 15:38:38 +0200505 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700506 if (WARN_ON(ifmodes != wiphy->interface_modes))
507 wiphy->interface_modes = ifmodes;
Johannes Berg8318d782008-01-24 19:38:38 +0100508
Johannes Berg7527a782011-05-13 10:58:57 +0200509 res = wiphy_verify_combinations(wiphy);
510 if (res)
511 return res;
512
Johannes Berg8318d782008-01-24 19:38:38 +0100513 /* sanity check supported bands/channels */
514 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
515 sband = wiphy->bands[band];
516 if (!sband)
517 continue;
518
519 sband->band = band;
520
Johannes Berg881d9482009-01-21 15:13:48 +0100521 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
Johannes Berg8318d782008-01-24 19:38:38 +0100522 return -EINVAL;
Johannes Berg881d9482009-01-21 15:13:48 +0100523
524 /*
Amitkumar Karwar40db6c72011-04-21 14:10:27 -0700525 * Since cfg80211_disable_40mhz_24ghz is global, we can
526 * modify the sband's ht data even if the driver uses a
527 * global structure for that.
528 */
529 if (cfg80211_disable_40mhz_24ghz &&
530 band == IEEE80211_BAND_2GHZ &&
531 sband->ht_cap.ht_supported) {
532 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
533 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
534 }
535
536 /*
Johannes Berg881d9482009-01-21 15:13:48 +0100537 * Since we use a u32 for rate bitmaps in
538 * ieee80211_get_response_rate, we cannot
539 * have more than 32 legacy rates.
540 */
541 if (WARN_ON(sband->n_bitrates > 32))
542 return -EINVAL;
Johannes Berg8318d782008-01-24 19:38:38 +0100543
544 for (i = 0; i < sband->n_channels; i++) {
545 sband->channels[i].orig_flags =
546 sband->channels[i].flags;
547 sband->channels[i].orig_mag =
548 sband->channels[i].max_antenna_gain;
549 sband->channels[i].orig_mpwr =
550 sband->channels[i].max_power;
551 sband->channels[i].band = band;
552 }
553
554 have_band = true;
555 }
556
557 if (!have_band) {
558 WARN_ON(1);
559 return -EINVAL;
560 }
561
Johannes Bergff1b6e62011-05-04 15:37:28 +0200562 if (rdev->wiphy.wowlan.n_patterns) {
563 if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len ||
564 rdev->wiphy.wowlan.pattern_min_len >
565 rdev->wiphy.wowlan.pattern_max_len))
566 return -EINVAL;
567 }
568
Johannes Berg8318d782008-01-24 19:38:38 +0100569 /* check and set up bitrates */
570 ieee80211_set_bitrate_flags(wiphy);
571
Maxime Bizon5a652052010-07-21 17:21:38 +0200572 mutex_lock(&cfg80211_mutex);
573
Johannes Berg79c97e92009-07-07 03:56:12 +0200574 res = device_add(&rdev->wiphy.dev);
John W. Linvillec3d34d52010-08-30 17:36:40 -0400575 if (res) {
576 mutex_unlock(&cfg80211_mutex);
577 return res;
578 }
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200579
Johannes Berg2f0accc2009-06-10 16:50:29 +0200580 /* set up regulatory info */
581 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
582
Johannes Berg5f2aa252010-01-17 15:49:02 +0100583 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200584 cfg80211_rdev_list_generation++;
Johannes Berg704232c2007-04-23 12:20:05 -0700585
586 /* add to debugfs */
Johannes Berg79c97e92009-07-07 03:56:12 +0200587 rdev->wiphy.debugfsdir =
588 debugfs_create_dir(wiphy_name(&rdev->wiphy),
Johannes Berg704232c2007-04-23 12:20:05 -0700589 ieee80211_debugfs_dir);
Johannes Berg79c97e92009-07-07 03:56:12 +0200590 if (IS_ERR(rdev->wiphy.debugfsdir))
591 rdev->wiphy.debugfsdir = NULL;
Johannes Berg704232c2007-04-23 12:20:05 -0700592
Johannes Berg5be83de2009-11-19 00:56:28 +0100593 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -0400594 struct regulatory_request request;
595
596 request.wiphy_idx = get_wiphy_idx(wiphy);
597 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
598 request.alpha2[0] = '9';
599 request.alpha2[1] = '9';
600
601 nl80211_send_reg_change_event(&request);
602 }
603
Johannes Berg79c97e92009-07-07 03:56:12 +0200604 cfg80211_debugfs_rdev_add(rdev);
Maxime Bizon5a652052010-07-21 17:21:38 +0200605 mutex_unlock(&cfg80211_mutex);
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400606
John W. Linvillec3d34d52010-08-30 17:36:40 -0400607 /*
608 * due to a locking dependency this has to be outside of the
609 * cfg80211_mutex lock
610 */
611 res = rfkill_register(rdev->rfkill);
612 if (res)
613 goto out_rm_dev;
614
Johannes Berg2f0accc2009-06-10 16:50:29 +0200615 return 0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200616
Maxime Bizon5a652052010-07-21 17:21:38 +0200617out_rm_dev:
Johannes Berg79c97e92009-07-07 03:56:12 +0200618 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700619 return res;
620}
621EXPORT_SYMBOL(wiphy_register);
622
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200623void wiphy_rfkill_start_polling(struct wiphy *wiphy)
624{
Johannes Berg79c97e92009-07-07 03:56:12 +0200625 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200626
Johannes Berg79c97e92009-07-07 03:56:12 +0200627 if (!rdev->ops->rfkill_poll)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200628 return;
Johannes Berg79c97e92009-07-07 03:56:12 +0200629 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
630 rfkill_resume_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200631}
632EXPORT_SYMBOL(wiphy_rfkill_start_polling);
633
634void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
635{
Johannes Berg79c97e92009-07-07 03:56:12 +0200636 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200637
Johannes Berg79c97e92009-07-07 03:56:12 +0200638 rfkill_pause_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200639}
640EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
641
Johannes Berg704232c2007-04-23 12:20:05 -0700642void wiphy_unregister(struct wiphy *wiphy)
643{
Johannes Berg79c97e92009-07-07 03:56:12 +0200644 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700645
Johannes Berg79c97e92009-07-07 03:56:12 +0200646 rfkill_unregister(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200647
Johannes Bergf16bfc12007-04-26 20:51:12 -0700648 /* protect the device list */
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500649 mutex_lock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700650
Johannes Bergad002392009-08-18 19:51:57 +0200651 wait_event(rdev->dev_wait, ({
652 int __count;
653 mutex_lock(&rdev->devlist_mtx);
654 __count = rdev->opencount;
655 mutex_unlock(&rdev->devlist_mtx);
656 __count == 0;}));
657
658 mutex_lock(&rdev->devlist_mtx);
Johannes Berg79c97e92009-07-07 03:56:12 +0200659 BUG_ON(!list_empty(&rdev->netdev_list));
Johannes Bergad002392009-08-18 19:51:57 +0200660 mutex_unlock(&rdev->devlist_mtx);
661
662 /*
663 * First remove the hardware from everywhere, this makes
664 * it impossible to find from userspace.
665 */
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100666 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100667 list_del_rcu(&rdev->list);
668 synchronize_rcu();
Johannes Bergf16bfc12007-04-26 20:51:12 -0700669
670 /*
Johannes Berg79c97e92009-07-07 03:56:12 +0200671 * Try to grab rdev->mtx. If a command is still in progress,
Johannes Bergf16bfc12007-04-26 20:51:12 -0700672 * hopefully the driver will refuse it since it's tearing
673 * down the device already. We wait for this command to complete
674 * before unlinking the item from the list.
675 * Note: as codified by the BUG_ON above we cannot get here if
Johannes Bergad002392009-08-18 19:51:57 +0200676 * a virtual interface is still present. Hence, we can only get
677 * to lock contention here if userspace issues a command that
678 * identified the hardware by wiphy index.
Johannes Bergf16bfc12007-04-26 20:51:12 -0700679 */
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200680 cfg80211_lock_rdev(rdev);
Johannes Bergad002392009-08-18 19:51:57 +0200681 /* nothing */
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200682 cfg80211_unlock_rdev(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700683
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800684 /* If this device got a regulatory hint tell core its
685 * free to listen now to a new shiny device regulatory hint */
686 reg_device_remove(wiphy);
687
Johannes Bergf5ea9122009-08-07 16:17:38 +0200688 cfg80211_rdev_list_generation++;
Johannes Berg79c97e92009-07-07 03:56:12 +0200689 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700690
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500691 mutex_unlock(&cfg80211_mutex);
Johannes Berg66825882009-07-13 13:24:44 +0200692
Johannes Berg36e6fea2009-08-12 22:21:21 +0200693 flush_work(&rdev->scan_done_wk);
Johannes Berg66825882009-07-13 13:24:44 +0200694 cancel_work_sync(&rdev->conn_work);
Johannes Berg66825882009-07-13 13:24:44 +0200695 flush_work(&rdev->event_work);
Johannes Berg704232c2007-04-23 12:20:05 -0700696}
697EXPORT_SYMBOL(wiphy_unregister);
698
Johannes Berg79c97e92009-07-07 03:56:12 +0200699void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700700{
Johannes Berg2a519312009-02-10 21:25:55 +0100701 struct cfg80211_internal_bss *scan, *tmp;
Johannes Berg79c97e92009-07-07 03:56:12 +0200702 rfkill_destroy(rdev->rfkill);
703 mutex_destroy(&rdev->mtx);
704 mutex_destroy(&rdev->devlist_mtx);
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300705 mutex_destroy(&rdev->sched_scan_mtx);
Johannes Berg79c97e92009-07-07 03:56:12 +0200706 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
Johannes Berg78c1c7e2009-02-10 21:25:57 +0100707 cfg80211_put_bss(&scan->pub);
Johannes Bergff1b6e62011-05-04 15:37:28 +0200708 cfg80211_rdev_free_wowlan(rdev);
Johannes Berg79c97e92009-07-07 03:56:12 +0200709 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700710}
711
712void wiphy_free(struct wiphy *wiphy)
713{
714 put_device(&wiphy->dev);
715}
716EXPORT_SYMBOL(wiphy_free);
717
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200718void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
719{
Johannes Berg79c97e92009-07-07 03:56:12 +0200720 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200721
Johannes Berg79c97e92009-07-07 03:56:12 +0200722 if (rfkill_set_hw_state(rdev->rfkill, blocked))
723 schedule_work(&rdev->rfkill_sync);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200724}
725EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
726
Johannes Bergad002392009-08-18 19:51:57 +0200727static void wdev_cleanup_work(struct work_struct *work)
728{
729 struct wireless_dev *wdev;
730 struct cfg80211_registered_device *rdev;
731
732 wdev = container_of(work, struct wireless_dev, cleanup_work);
733 rdev = wiphy_to_dev(wdev->wiphy);
734
735 cfg80211_lock_rdev(rdev);
736
737 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
738 rdev->scan_req->aborted = true;
Johannes Berg01a0ac42009-08-20 21:36:16 +0200739 ___cfg80211_scan_done(rdev, true);
Johannes Bergad002392009-08-18 19:51:57 +0200740 }
741
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300742 cfg80211_unlock_rdev(rdev);
743
744 mutex_lock(&rdev->sched_scan_mtx);
745
Luciano Coelho807f8a82011-05-11 17:09:35 +0300746 if (WARN_ON(rdev->sched_scan_req &&
747 rdev->sched_scan_req->dev == wdev->netdev)) {
748 __cfg80211_stop_sched_scan(rdev, false);
749 }
750
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300751 mutex_unlock(&rdev->sched_scan_mtx);
Johannes Bergad002392009-08-18 19:51:57 +0200752
753 mutex_lock(&rdev->devlist_mtx);
754 rdev->opencount--;
755 mutex_unlock(&rdev->devlist_mtx);
756 wake_up(&rdev->dev_wait);
757
758 dev_put(wdev->netdev);
759}
760
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000761static struct device_type wiphy_type = {
762 .name = "wlan",
763};
764
Johannes Berg704232c2007-04-23 12:20:05 -0700765static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
766 unsigned long state,
767 void *ndev)
768{
769 struct net_device *dev = ndev;
Johannes Berg2a783c12009-07-01 21:26:45 +0200770 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg704232c2007-04-23 12:20:05 -0700771 struct cfg80211_registered_device *rdev;
Johannes Berg7527a782011-05-13 10:58:57 +0200772 int ret;
Johannes Berg704232c2007-04-23 12:20:05 -0700773
Johannes Berg2a783c12009-07-01 21:26:45 +0200774 if (!wdev)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200775 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700776
Johannes Berg2a783c12009-07-01 21:26:45 +0200777 rdev = wiphy_to_dev(wdev->wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700778
Johannes Berg2a783c12009-07-01 21:26:45 +0200779 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
Johannes Berg60719ff2008-09-16 14:55:09 +0200780
Johannes Berg704232c2007-04-23 12:20:05 -0700781 switch (state) {
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000782 case NETDEV_POST_INIT:
783 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
784 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700785 case NETDEV_REGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200786 /*
787 * NB: cannot take rdev->mtx here because this may be
788 * called within code protected by it when interfaces
789 * are added with nl80211.
790 */
Johannes Berg667503d2009-07-07 03:56:11 +0200791 mutex_init(&wdev->mtx);
Johannes Bergad002392009-08-18 19:51:57 +0200792 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
Johannes Berg667503d2009-07-07 03:56:11 +0200793 INIT_LIST_HEAD(&wdev->event_list);
794 spin_lock_init(&wdev->event_lock);
Johannes Berg2e161f782010-08-12 15:38:38 +0200795 INIT_LIST_HEAD(&wdev->mgmt_registrations);
796 spin_lock_init(&wdev->mgmt_registrations_lock);
Jouni Malinen026331c2010-02-15 12:53:10 +0200797
Johannes Berg704232c2007-04-23 12:20:05 -0700798 mutex_lock(&rdev->devlist_mtx);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100799 list_add_rcu(&wdev->list, &rdev->netdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200800 rdev->devlist_generation++;
Johannes Berg463d0182009-07-14 00:33:35 +0200801 /* can only change netns with wiphy */
802 dev->features |= NETIF_F_NETNS_LOCAL;
803
Johannes Berg704232c2007-04-23 12:20:05 -0700804 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
805 "phy80211")) {
Joe Perchese9c02682010-11-16 19:56:49 -0800806 pr_err("failed to add phy80211 symlink to netdev!\n");
Johannes Berg704232c2007-04-23 12:20:05 -0700807 }
Johannes Berg2a783c12009-07-01 21:26:45 +0200808 wdev->netdev = dev;
Samuel Ortizb23aa672009-07-01 21:26:54 +0200809 wdev->sme_state = CFG80211_SME_IDLE;
Johannes Bergbc92afd2009-07-01 21:26:57 +0200810 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg3d23e342009-09-29 23:27:28 +0200811#ifdef CONFIG_CFG80211_WEXT
Johannes Berg2a783c12009-07-01 21:26:45 +0200812 wdev->wext.default_key = -1;
813 wdev->wext.default_mgmt_key = -1;
Johannes Bergf2129352009-07-01 21:26:56 +0200814 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Kalle Valoffb9eb32010-02-17 17:58:10 +0200815#endif
816
Johannes Berg5be83de2009-11-19 00:56:28 +0100817 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
Kalle Valoffb9eb32010-02-17 17:58:10 +0200818 wdev->ps = true;
Johannes Berg5be83de2009-11-19 00:56:28 +0100819 else
Kalle Valoffb9eb32010-02-17 17:58:10 +0200820 wdev->ps = false;
Juuso Oikarinen9043f3b2010-04-27 12:47:41 +0300821 /* allow mac80211 to determine the timeout */
822 wdev->ps_timeout = -1;
Kalle Valoffb9eb32010-02-17 17:58:10 +0200823
John W. Linville4890e3b2009-09-30 14:50:17 -0400824 if (!dev->ethtool_ops)
825 dev->ethtool_ops = &cfg80211_ethtool_ops;
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100826
827 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
Johannes Berg074ac8d2010-09-16 14:58:22 +0200828 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100829 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
830 dev->priv_flags |= IFF_DONT_BRIDGE;
Johannes Berg704232c2007-04-23 12:20:05 -0700831 break;
Johannes Berg04a773a2009-04-19 21:24:32 +0200832 case NETDEV_GOING_DOWN:
Samuel Ortizb23aa672009-07-01 21:26:54 +0200833 switch (wdev->iftype) {
834 case NL80211_IFTYPE_ADHOC:
835 cfg80211_leave_ibss(rdev, dev, true);
836 break;
Johannes Berg074ac8d2010-09-16 14:58:22 +0200837 case NL80211_IFTYPE_P2P_CLIENT:
Samuel Ortizb23aa672009-07-01 21:26:54 +0200838 case NL80211_IFTYPE_STATION:
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300839 mutex_lock(&rdev->sched_scan_mtx);
Luciano Coelho807f8a82011-05-11 17:09:35 +0300840 __cfg80211_stop_sched_scan(rdev, false);
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300841 mutex_unlock(&rdev->sched_scan_mtx);
Luciano Coelho807f8a82011-05-11 17:09:35 +0300842
Johannes Berg667503d2009-07-07 03:56:11 +0200843 wdev_lock(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200844#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +0200845 kfree(wdev->wext.ie);
846 wdev->wext.ie = NULL;
847 wdev->wext.ie_len = 0;
Johannes Berg0eb14642009-07-02 15:49:03 +0200848 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Johannes Bergf2129352009-07-01 21:26:56 +0200849#endif
Johannes Berg667503d2009-07-07 03:56:11 +0200850 __cfg80211_disconnect(rdev, dev,
851 WLAN_REASON_DEAUTH_LEAVING, true);
Johannes Berg19957bb2009-07-02 17:20:43 +0200852 cfg80211_mlme_down(rdev, dev);
Johannes Berg667503d2009-07-07 03:56:11 +0200853 wdev_unlock(wdev);
Samuel Ortizb23aa672009-07-01 21:26:54 +0200854 break;
Johannes Berg29cbe682010-12-03 09:20:44 +0100855 case NL80211_IFTYPE_MESH_POINT:
856 cfg80211_leave_mesh(rdev, dev);
857 break;
Samuel Ortizb23aa672009-07-01 21:26:54 +0200858 default:
859 break;
860 }
Johannes Berg56d18932011-05-09 18:41:15 +0200861 wdev->beacon_interval = 0;
Johannes Berg01a0ac42009-08-20 21:36:16 +0200862 break;
863 case NETDEV_DOWN:
Johannes Bergad002392009-08-18 19:51:57 +0200864 dev_hold(dev);
Alban Browaeyse60d7442009-11-25 15:13:00 +0100865 queue_work(cfg80211_wq, &wdev->cleanup_work);
Johannes Berg04a773a2009-04-19 21:24:32 +0200866 break;
867 case NETDEV_UP:
Johannes Bergad002392009-08-18 19:51:57 +0200868 /*
869 * If we have a really quick DOWN/UP succession we may
870 * have this work still pending ... cancel it and see
871 * if it was pending, in which case we need to account
872 * for some of the work it would have done.
873 */
874 if (cancel_work_sync(&wdev->cleanup_work)) {
875 mutex_lock(&rdev->devlist_mtx);
876 rdev->opencount--;
877 mutex_unlock(&rdev->devlist_mtx);
878 dev_put(dev);
879 }
Johannes Berg667503d2009-07-07 03:56:11 +0200880 cfg80211_lock_rdev(rdev);
Johannes Bergaee83ea2009-08-09 11:51:29 +0200881 mutex_lock(&rdev->devlist_mtx);
Johannes Berg667503d2009-07-07 03:56:11 +0200882 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200883 switch (wdev->iftype) {
Johannes Berg29cbe682010-12-03 09:20:44 +0100884#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +0200885 case NL80211_IFTYPE_ADHOC:
Johannes Bergfffd0932009-07-08 14:22:54 +0200886 cfg80211_ibss_wext_join(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200887 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200888 case NL80211_IFTYPE_STATION:
Johannes Bergfffd0932009-07-08 14:22:54 +0200889 cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200890 break;
Johannes Berg29cbe682010-12-03 09:20:44 +0100891#endif
Javier Cardonac80d5452010-12-16 17:37:49 -0800892#ifdef CONFIG_MAC80211_MESH
Johannes Berg29cbe682010-12-03 09:20:44 +0100893 case NL80211_IFTYPE_MESH_POINT:
Javier Cardonac80d5452010-12-16 17:37:49 -0800894 {
895 /* backward compat code... */
896 struct mesh_setup setup;
897 memcpy(&setup, &default_mesh_setup,
898 sizeof(setup));
899 /* back compat only needed for mesh_id */
900 setup.mesh_id = wdev->ssid;
901 setup.mesh_id_len = wdev->mesh_id_up_len;
902 if (wdev->mesh_id_up_len)
903 __cfg80211_join_mesh(rdev, dev,
904 &setup,
905 &default_mesh_config);
906 break;
907 }
908#endif
Johannes Bergf2129352009-07-01 21:26:56 +0200909 default:
910 break;
911 }
Johannes Berg667503d2009-07-07 03:56:11 +0200912 wdev_unlock(wdev);
Johannes Bergad002392009-08-18 19:51:57 +0200913 rdev->opencount++;
Johannes Bergaee83ea2009-08-09 11:51:29 +0200914 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg667503d2009-07-07 03:56:11 +0200915 cfg80211_unlock_rdev(rdev);
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +0200916
917 /*
918 * Configure power management to the driver here so that its
919 * correctly set also after interface type changes etc.
920 */
921 if (wdev->iftype == NL80211_IFTYPE_STATION &&
922 rdev->ops->set_power_mgmt)
923 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
924 wdev->ps,
925 wdev->ps_timeout)) {
926 /* assume this means it's off */
927 wdev->ps = false;
928 }
Johannes Berg2a783c12009-07-01 21:26:45 +0200929 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700930 case NETDEV_UNREGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200931 /*
932 * NB: cannot take rdev->mtx here because this may be
933 * called within code protected by it when interfaces
934 * are removed with nl80211.
935 */
Johannes Berg704232c2007-04-23 12:20:05 -0700936 mutex_lock(&rdev->devlist_mtx);
Johannes Berge40cbda2009-07-30 14:04:01 +0200937 /*
938 * It is possible to get NETDEV_UNREGISTER
939 * multiple times. To detect that, check
940 * that the interface is still on the list
941 * of registered interfaces, and only then
942 * remove and clean it up.
943 */
Johannes Berg2a783c12009-07-01 21:26:45 +0200944 if (!list_empty(&wdev->list)) {
Johannes Berg704232c2007-04-23 12:20:05 -0700945 sysfs_remove_link(&dev->dev.kobj, "phy80211");
Johannes Berg5f2aa252010-01-17 15:49:02 +0100946 list_del_rcu(&wdev->list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200947 rdev->devlist_generation++;
Johannes Berg2e161f782010-08-12 15:38:38 +0200948 cfg80211_mlme_purge_registrations(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200949#ifdef CONFIG_CFG80211_WEXT
Johannes Berge40cbda2009-07-30 14:04:01 +0200950 kfree(wdev->wext.keys);
951#endif
Johannes Berg704232c2007-04-23 12:20:05 -0700952 }
953 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100954 /*
955 * synchronise (so that we won't find this netdev
956 * from other code any more) and then clear the list
957 * head so that the above code can safely check for
958 * !list_empty() to avoid double-cleanup.
959 */
960 synchronize_rcu();
961 INIT_LIST_HEAD(&wdev->list);
Johannes Berg704232c2007-04-23 12:20:05 -0700962 break;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200963 case NETDEV_PRE_UP:
Johannes Berg0b20633d2009-07-07 03:56:13 +0200964 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
965 return notifier_from_errno(-EOPNOTSUPP);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200966 if (rfkill_blocked(rdev->rfkill))
967 return notifier_from_errno(-ERFKILL);
Johannes Berg7527a782011-05-13 10:58:57 +0200968 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
969 if (ret)
970 return notifier_from_errno(ret);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200971 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700972 }
973
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200974 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700975}
976
977static struct notifier_block cfg80211_netdev_notifier = {
978 .notifier_call = cfg80211_netdev_notifier_call,
979};
980
Johannes Berg463d0182009-07-14 00:33:35 +0200981static void __net_exit cfg80211_pernet_exit(struct net *net)
982{
983 struct cfg80211_registered_device *rdev;
984
985 rtnl_lock();
986 mutex_lock(&cfg80211_mutex);
987 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
988 if (net_eq(wiphy_net(&rdev->wiphy), net))
989 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
990 }
991 mutex_unlock(&cfg80211_mutex);
992 rtnl_unlock();
993}
994
995static struct pernet_operations cfg80211_pernet_ops = {
996 .exit = cfg80211_pernet_exit,
997};
998
999static int __init cfg80211_init(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001000{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001001 int err;
1002
Johannes Berg463d0182009-07-14 00:33:35 +02001003 err = register_pernet_device(&cfg80211_pernet_ops);
1004 if (err)
1005 goto out_fail_pernet;
1006
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001007 err = wiphy_sysfs_init();
Johannes Berg704232c2007-04-23 12:20:05 -07001008 if (err)
1009 goto out_fail_sysfs;
1010
1011 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1012 if (err)
1013 goto out_fail_notifier;
1014
Johannes Berg55682962007-09-20 13:09:35 -04001015 err = nl80211_init();
1016 if (err)
1017 goto out_fail_nl80211;
1018
Johannes Berg704232c2007-04-23 12:20:05 -07001019 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1020
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001021 err = regulatory_init();
1022 if (err)
1023 goto out_fail_reg;
1024
Alban Browaeyse60d7442009-11-25 15:13:00 +01001025 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1026 if (!cfg80211_wq)
1027 goto out_fail_wq;
1028
Johannes Berg704232c2007-04-23 12:20:05 -07001029 return 0;
1030
Alban Browaeyse60d7442009-11-25 15:13:00 +01001031out_fail_wq:
1032 regulatory_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001033out_fail_reg:
1034 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -04001035out_fail_nl80211:
1036 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
Johannes Berg704232c2007-04-23 12:20:05 -07001037out_fail_notifier:
1038 wiphy_sysfs_exit();
1039out_fail_sysfs:
Johannes Berg463d0182009-07-14 00:33:35 +02001040 unregister_pernet_device(&cfg80211_pernet_ops);
1041out_fail_pernet:
Johannes Berg704232c2007-04-23 12:20:05 -07001042 return err;
1043}
Johannes Berg3a462462007-09-10 13:44:45 +02001044subsys_initcall(cfg80211_init);
Johannes Berg704232c2007-04-23 12:20:05 -07001045
Uwe Kleine-Königf884e382010-06-18 09:38:54 +02001046static void __exit cfg80211_exit(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001047{
1048 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -04001049 nl80211_exit();
Johannes Berg704232c2007-04-23 12:20:05 -07001050 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1051 wiphy_sysfs_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001052 regulatory_exit();
Johannes Berg463d0182009-07-14 00:33:35 +02001053 unregister_pernet_device(&cfg80211_pernet_ops);
Alban Browaeyse60d7442009-11-25 15:13:00 +01001054 destroy_workqueue(cfg80211_wq);
Johannes Berg704232c2007-04-23 12:20:05 -07001055}
1056module_exit(cfg80211_exit);