blob: 645437cfc464d505a3673870f8c0a6eb73287535 [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 Berg667503dd2009-07-07 03:56:11 +0200309static void cfg80211_event_work(struct work_struct *work)
310{
311 struct cfg80211_registered_device *rdev;
Johannes Berg667503dd2009-07-07 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 Berg667503dd2009-07-07 03:56:11 +0200318
Johannes Berg3d54d252009-08-21 14:51:05 +0200319 cfg80211_process_rdev_events(rdev);
Johannes Berg667503dd2009-07-07 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 Berg77dbbb12011-07-13 10:48:55 +0200491 if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
492 !(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
493 return -EINVAL;
494
Johannes Bergef15aac2010-01-20 12:02:33 +0100495 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
496 return -EINVAL;
497
498 if (WARN_ON(wiphy->addresses &&
499 !is_zero_ether_addr(wiphy->perm_addr) &&
500 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
501 ETH_ALEN)))
502 return -EINVAL;
503
504 if (wiphy->addresses)
505 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
506
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700507 /* sanity check ifmodes */
508 WARN_ON(!ifmodes);
Johannes Berg2e161f72010-08-12 15:38:38 +0200509 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700510 if (WARN_ON(ifmodes != wiphy->interface_modes))
511 wiphy->interface_modes = ifmodes;
Johannes Berg8318d782008-01-24 19:38:38 +0100512
Johannes Berg7527a782011-05-13 10:58:57 +0200513 res = wiphy_verify_combinations(wiphy);
514 if (res)
515 return res;
516
Johannes Berg8318d782008-01-24 19:38:38 +0100517 /* sanity check supported bands/channels */
518 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
519 sband = wiphy->bands[band];
520 if (!sband)
521 continue;
522
523 sband->band = band;
524
Johannes Berg881d9482009-01-21 15:13:48 +0100525 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
Johannes Berg8318d782008-01-24 19:38:38 +0100526 return -EINVAL;
Johannes Berg881d9482009-01-21 15:13:48 +0100527
528 /*
Amitkumar Karwar40db6c72011-04-21 14:10:27 -0700529 * Since cfg80211_disable_40mhz_24ghz is global, we can
530 * modify the sband's ht data even if the driver uses a
531 * global structure for that.
532 */
533 if (cfg80211_disable_40mhz_24ghz &&
534 band == IEEE80211_BAND_2GHZ &&
535 sband->ht_cap.ht_supported) {
536 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
537 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
538 }
539
540 /*
Johannes Berg881d9482009-01-21 15:13:48 +0100541 * Since we use a u32 for rate bitmaps in
542 * ieee80211_get_response_rate, we cannot
543 * have more than 32 legacy rates.
544 */
545 if (WARN_ON(sband->n_bitrates > 32))
546 return -EINVAL;
Johannes Berg8318d782008-01-24 19:38:38 +0100547
548 for (i = 0; i < sband->n_channels; i++) {
549 sband->channels[i].orig_flags =
550 sband->channels[i].flags;
551 sband->channels[i].orig_mag =
552 sband->channels[i].max_antenna_gain;
553 sband->channels[i].orig_mpwr =
554 sband->channels[i].max_power;
555 sband->channels[i].band = band;
556 }
557
558 have_band = true;
559 }
560
561 if (!have_band) {
562 WARN_ON(1);
563 return -EINVAL;
564 }
565
Johannes Bergff1b6e62011-05-04 15:37:28 +0200566 if (rdev->wiphy.wowlan.n_patterns) {
567 if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len ||
568 rdev->wiphy.wowlan.pattern_min_len >
569 rdev->wiphy.wowlan.pattern_max_len))
570 return -EINVAL;
571 }
572
Johannes Berg8318d782008-01-24 19:38:38 +0100573 /* check and set up bitrates */
574 ieee80211_set_bitrate_flags(wiphy);
575
Maxime Bizon5a652052010-07-21 17:21:38 +0200576 mutex_lock(&cfg80211_mutex);
577
Johannes Berg79c97e92009-07-07 03:56:12 +0200578 res = device_add(&rdev->wiphy.dev);
John W. Linvillec3d34d52010-08-30 17:36:40 -0400579 if (res) {
580 mutex_unlock(&cfg80211_mutex);
581 return res;
582 }
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200583
Johannes Berg2f0accc2009-06-10 16:50:29 +0200584 /* set up regulatory info */
585 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
586
Johannes Berg5f2aa252010-01-17 15:49:02 +0100587 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200588 cfg80211_rdev_list_generation++;
Johannes Berg704232c2007-04-23 12:20:05 -0700589
590 /* add to debugfs */
Johannes Berg79c97e92009-07-07 03:56:12 +0200591 rdev->wiphy.debugfsdir =
592 debugfs_create_dir(wiphy_name(&rdev->wiphy),
Johannes Berg704232c2007-04-23 12:20:05 -0700593 ieee80211_debugfs_dir);
Johannes Berg79c97e92009-07-07 03:56:12 +0200594 if (IS_ERR(rdev->wiphy.debugfsdir))
595 rdev->wiphy.debugfsdir = NULL;
Johannes Berg704232c2007-04-23 12:20:05 -0700596
Johannes Berg5be83de2009-11-19 00:56:28 +0100597 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -0400598 struct regulatory_request request;
599
600 request.wiphy_idx = get_wiphy_idx(wiphy);
601 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
602 request.alpha2[0] = '9';
603 request.alpha2[1] = '9';
604
605 nl80211_send_reg_change_event(&request);
606 }
607
Johannes Berg79c97e92009-07-07 03:56:12 +0200608 cfg80211_debugfs_rdev_add(rdev);
Maxime Bizon5a652052010-07-21 17:21:38 +0200609 mutex_unlock(&cfg80211_mutex);
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400610
John W. Linvillec3d34d52010-08-30 17:36:40 -0400611 /*
612 * due to a locking dependency this has to be outside of the
613 * cfg80211_mutex lock
614 */
615 res = rfkill_register(rdev->rfkill);
616 if (res)
617 goto out_rm_dev;
618
Johannes Berg2f0accc2009-06-10 16:50:29 +0200619 return 0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200620
Maxime Bizon5a652052010-07-21 17:21:38 +0200621out_rm_dev:
Johannes Berg79c97e92009-07-07 03:56:12 +0200622 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700623 return res;
624}
625EXPORT_SYMBOL(wiphy_register);
626
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200627void wiphy_rfkill_start_polling(struct wiphy *wiphy)
628{
Johannes Berg79c97e92009-07-07 03:56:12 +0200629 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200630
Johannes Berg79c97e92009-07-07 03:56:12 +0200631 if (!rdev->ops->rfkill_poll)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200632 return;
Johannes Berg79c97e92009-07-07 03:56:12 +0200633 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
634 rfkill_resume_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200635}
636EXPORT_SYMBOL(wiphy_rfkill_start_polling);
637
638void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
639{
Johannes Berg79c97e92009-07-07 03:56:12 +0200640 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200641
Johannes Berg79c97e92009-07-07 03:56:12 +0200642 rfkill_pause_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200643}
644EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
645
Johannes Berg704232c2007-04-23 12:20:05 -0700646void wiphy_unregister(struct wiphy *wiphy)
647{
Johannes Berg79c97e92009-07-07 03:56:12 +0200648 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700649
Johannes Berg79c97e92009-07-07 03:56:12 +0200650 rfkill_unregister(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200651
Johannes Bergf16bfc12007-04-26 20:51:12 -0700652 /* protect the device list */
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500653 mutex_lock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700654
Johannes Bergad002392009-08-18 19:51:57 +0200655 wait_event(rdev->dev_wait, ({
656 int __count;
657 mutex_lock(&rdev->devlist_mtx);
658 __count = rdev->opencount;
659 mutex_unlock(&rdev->devlist_mtx);
660 __count == 0;}));
661
662 mutex_lock(&rdev->devlist_mtx);
Johannes Berg79c97e92009-07-07 03:56:12 +0200663 BUG_ON(!list_empty(&rdev->netdev_list));
Johannes Bergad002392009-08-18 19:51:57 +0200664 mutex_unlock(&rdev->devlist_mtx);
665
666 /*
667 * First remove the hardware from everywhere, this makes
668 * it impossible to find from userspace.
669 */
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100670 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100671 list_del_rcu(&rdev->list);
672 synchronize_rcu();
Johannes Bergf16bfc12007-04-26 20:51:12 -0700673
674 /*
Johannes Berg79c97e92009-07-07 03:56:12 +0200675 * Try to grab rdev->mtx. If a command is still in progress,
Johannes Bergf16bfc12007-04-26 20:51:12 -0700676 * hopefully the driver will refuse it since it's tearing
677 * down the device already. We wait for this command to complete
678 * before unlinking the item from the list.
679 * Note: as codified by the BUG_ON above we cannot get here if
Johannes Bergad002392009-08-18 19:51:57 +0200680 * a virtual interface is still present. Hence, we can only get
681 * to lock contention here if userspace issues a command that
682 * identified the hardware by wiphy index.
Johannes Bergf16bfc12007-04-26 20:51:12 -0700683 */
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200684 cfg80211_lock_rdev(rdev);
Johannes Bergad002392009-08-18 19:51:57 +0200685 /* nothing */
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200686 cfg80211_unlock_rdev(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700687
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800688 /* If this device got a regulatory hint tell core its
689 * free to listen now to a new shiny device regulatory hint */
690 reg_device_remove(wiphy);
691
Johannes Bergf5ea9122009-08-07 16:17:38 +0200692 cfg80211_rdev_list_generation++;
Johannes Berg79c97e92009-07-07 03:56:12 +0200693 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700694
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500695 mutex_unlock(&cfg80211_mutex);
Johannes Berg66825882009-07-13 13:24:44 +0200696
Johannes Berg36e6fea2009-08-12 22:21:21 +0200697 flush_work(&rdev->scan_done_wk);
Johannes Berg66825882009-07-13 13:24:44 +0200698 cancel_work_sync(&rdev->conn_work);
Johannes Berg66825882009-07-13 13:24:44 +0200699 flush_work(&rdev->event_work);
Johannes Berg704232c2007-04-23 12:20:05 -0700700}
701EXPORT_SYMBOL(wiphy_unregister);
702
Johannes Berg79c97e92009-07-07 03:56:12 +0200703void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700704{
Johannes Berg2a519312009-02-10 21:25:55 +0100705 struct cfg80211_internal_bss *scan, *tmp;
Johannes Berg79c97e92009-07-07 03:56:12 +0200706 rfkill_destroy(rdev->rfkill);
707 mutex_destroy(&rdev->mtx);
708 mutex_destroy(&rdev->devlist_mtx);
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300709 mutex_destroy(&rdev->sched_scan_mtx);
Johannes Berg79c97e92009-07-07 03:56:12 +0200710 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
Johannes Berg78c1c7e2009-02-10 21:25:57 +0100711 cfg80211_put_bss(&scan->pub);
Johannes Bergff1b6e62011-05-04 15:37:28 +0200712 cfg80211_rdev_free_wowlan(rdev);
Johannes Berg79c97e92009-07-07 03:56:12 +0200713 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700714}
715
716void wiphy_free(struct wiphy *wiphy)
717{
718 put_device(&wiphy->dev);
719}
720EXPORT_SYMBOL(wiphy_free);
721
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200722void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
723{
Johannes Berg79c97e92009-07-07 03:56:12 +0200724 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200725
Johannes Berg79c97e92009-07-07 03:56:12 +0200726 if (rfkill_set_hw_state(rdev->rfkill, blocked))
727 schedule_work(&rdev->rfkill_sync);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200728}
729EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
730
Johannes Bergad002392009-08-18 19:51:57 +0200731static void wdev_cleanup_work(struct work_struct *work)
732{
733 struct wireless_dev *wdev;
734 struct cfg80211_registered_device *rdev;
735
736 wdev = container_of(work, struct wireless_dev, cleanup_work);
737 rdev = wiphy_to_dev(wdev->wiphy);
738
739 cfg80211_lock_rdev(rdev);
740
741 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
742 rdev->scan_req->aborted = true;
Johannes Berg01a0ac42009-08-20 21:36:16 +0200743 ___cfg80211_scan_done(rdev, true);
Johannes Bergad002392009-08-18 19:51:57 +0200744 }
745
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300746 cfg80211_unlock_rdev(rdev);
747
748 mutex_lock(&rdev->sched_scan_mtx);
749
Luciano Coelho807f8a82011-05-11 17:09:35 +0300750 if (WARN_ON(rdev->sched_scan_req &&
751 rdev->sched_scan_req->dev == wdev->netdev)) {
752 __cfg80211_stop_sched_scan(rdev, false);
753 }
754
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300755 mutex_unlock(&rdev->sched_scan_mtx);
Johannes Bergad002392009-08-18 19:51:57 +0200756
757 mutex_lock(&rdev->devlist_mtx);
758 rdev->opencount--;
759 mutex_unlock(&rdev->devlist_mtx);
760 wake_up(&rdev->dev_wait);
761
762 dev_put(wdev->netdev);
763}
764
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000765static struct device_type wiphy_type = {
766 .name = "wlan",
767};
768
Johannes Berg704232c2007-04-23 12:20:05 -0700769static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
770 unsigned long state,
771 void *ndev)
772{
773 struct net_device *dev = ndev;
Johannes Berg2a783c12009-07-01 21:26:45 +0200774 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg704232c2007-04-23 12:20:05 -0700775 struct cfg80211_registered_device *rdev;
Johannes Berg7527a782011-05-13 10:58:57 +0200776 int ret;
Johannes Berg704232c2007-04-23 12:20:05 -0700777
Johannes Berg2a783c12009-07-01 21:26:45 +0200778 if (!wdev)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200779 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700780
Johannes Berg2a783c12009-07-01 21:26:45 +0200781 rdev = wiphy_to_dev(wdev->wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700782
Johannes Berg2a783c12009-07-01 21:26:45 +0200783 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
Johannes Berg60719ff2008-09-16 14:55:09 +0200784
Johannes Berg704232c2007-04-23 12:20:05 -0700785 switch (state) {
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000786 case NETDEV_POST_INIT:
787 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
788 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700789 case NETDEV_REGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200790 /*
791 * NB: cannot take rdev->mtx here because this may be
792 * called within code protected by it when interfaces
793 * are added with nl80211.
794 */
Johannes Berg667503dd2009-07-07 03:56:11 +0200795 mutex_init(&wdev->mtx);
Johannes Bergad002392009-08-18 19:51:57 +0200796 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
Johannes Berg667503dd2009-07-07 03:56:11 +0200797 INIT_LIST_HEAD(&wdev->event_list);
798 spin_lock_init(&wdev->event_lock);
Johannes Berg2e161f72010-08-12 15:38:38 +0200799 INIT_LIST_HEAD(&wdev->mgmt_registrations);
800 spin_lock_init(&wdev->mgmt_registrations_lock);
Jouni Malinen026331c2010-02-15 12:53:10 +0200801
Johannes Berg704232c2007-04-23 12:20:05 -0700802 mutex_lock(&rdev->devlist_mtx);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100803 list_add_rcu(&wdev->list, &rdev->netdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200804 rdev->devlist_generation++;
Johannes Berg463d0182009-07-14 00:33:35 +0200805 /* can only change netns with wiphy */
806 dev->features |= NETIF_F_NETNS_LOCAL;
807
Johannes Berg704232c2007-04-23 12:20:05 -0700808 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
809 "phy80211")) {
Joe Perchese9c02682010-11-16 19:56:49 -0800810 pr_err("failed to add phy80211 symlink to netdev!\n");
Johannes Berg704232c2007-04-23 12:20:05 -0700811 }
Johannes Berg2a783c12009-07-01 21:26:45 +0200812 wdev->netdev = dev;
Samuel Ortizb23aa672009-07-01 21:26:54 +0200813 wdev->sme_state = CFG80211_SME_IDLE;
Johannes Bergbc92afd2009-07-01 21:26:57 +0200814 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg3d23e342009-09-29 23:27:28 +0200815#ifdef CONFIG_CFG80211_WEXT
Johannes Berg2a783c12009-07-01 21:26:45 +0200816 wdev->wext.default_key = -1;
817 wdev->wext.default_mgmt_key = -1;
Johannes Bergf2129352009-07-01 21:26:56 +0200818 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Kalle Valoffb9eb32010-02-17 17:58:10 +0200819#endif
820
Johannes Berg5be83de2009-11-19 00:56:28 +0100821 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
Kalle Valoffb9eb32010-02-17 17:58:10 +0200822 wdev->ps = true;
Johannes Berg5be83de2009-11-19 00:56:28 +0100823 else
Kalle Valoffb9eb32010-02-17 17:58:10 +0200824 wdev->ps = false;
Juuso Oikarinen9043f3b2010-04-27 12:47:41 +0300825 /* allow mac80211 to determine the timeout */
826 wdev->ps_timeout = -1;
Kalle Valoffb9eb32010-02-17 17:58:10 +0200827
John W. Linville4890e3b2009-09-30 14:50:17 -0400828 if (!dev->ethtool_ops)
829 dev->ethtool_ops = &cfg80211_ethtool_ops;
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100830
831 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
Johannes Berg074ac8d2010-09-16 14:58:22 +0200832 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100833 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
834 dev->priv_flags |= IFF_DONT_BRIDGE;
Johannes Berg704232c2007-04-23 12:20:05 -0700835 break;
Johannes Berg04a773a2009-04-19 21:24:32 +0200836 case NETDEV_GOING_DOWN:
Samuel Ortizb23aa672009-07-01 21:26:54 +0200837 switch (wdev->iftype) {
838 case NL80211_IFTYPE_ADHOC:
839 cfg80211_leave_ibss(rdev, dev, true);
840 break;
Johannes Berg074ac8d2010-09-16 14:58:22 +0200841 case NL80211_IFTYPE_P2P_CLIENT:
Samuel Ortizb23aa672009-07-01 21:26:54 +0200842 case NL80211_IFTYPE_STATION:
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300843 mutex_lock(&rdev->sched_scan_mtx);
Luciano Coelho807f8a82011-05-11 17:09:35 +0300844 __cfg80211_stop_sched_scan(rdev, false);
Luciano Coelhoc10841c2011-06-30 08:32:41 +0300845 mutex_unlock(&rdev->sched_scan_mtx);
Luciano Coelho807f8a82011-05-11 17:09:35 +0300846
Johannes Berg667503dd2009-07-07 03:56:11 +0200847 wdev_lock(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200848#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +0200849 kfree(wdev->wext.ie);
850 wdev->wext.ie = NULL;
851 wdev->wext.ie_len = 0;
Johannes Berg0eb14642009-07-02 15:49:03 +0200852 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Johannes Bergf2129352009-07-01 21:26:56 +0200853#endif
Johannes Berg667503dd2009-07-07 03:56:11 +0200854 __cfg80211_disconnect(rdev, dev,
855 WLAN_REASON_DEAUTH_LEAVING, true);
Johannes Berg19957bb2009-07-02 17:20:43 +0200856 cfg80211_mlme_down(rdev, dev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200857 wdev_unlock(wdev);
Samuel Ortizb23aa672009-07-01 21:26:54 +0200858 break;
Johannes Berg29cbe682010-12-03 09:20:44 +0100859 case NL80211_IFTYPE_MESH_POINT:
860 cfg80211_leave_mesh(rdev, dev);
861 break;
Samuel Ortizb23aa672009-07-01 21:26:54 +0200862 default:
863 break;
864 }
Johannes Berg56d18932011-05-09 18:41:15 +0200865 wdev->beacon_interval = 0;
Johannes Berg01a0ac42009-08-20 21:36:16 +0200866 break;
867 case NETDEV_DOWN:
Johannes Bergad002392009-08-18 19:51:57 +0200868 dev_hold(dev);
Alban Browaeyse60d7442009-11-25 15:13:00 +0100869 queue_work(cfg80211_wq, &wdev->cleanup_work);
Johannes Berg04a773a2009-04-19 21:24:32 +0200870 break;
871 case NETDEV_UP:
Johannes Bergad002392009-08-18 19:51:57 +0200872 /*
873 * If we have a really quick DOWN/UP succession we may
874 * have this work still pending ... cancel it and see
875 * if it was pending, in which case we need to account
876 * for some of the work it would have done.
877 */
878 if (cancel_work_sync(&wdev->cleanup_work)) {
879 mutex_lock(&rdev->devlist_mtx);
880 rdev->opencount--;
881 mutex_unlock(&rdev->devlist_mtx);
882 dev_put(dev);
883 }
Johannes Berg667503dd2009-07-07 03:56:11 +0200884 cfg80211_lock_rdev(rdev);
Johannes Bergaee83ea2009-08-09 11:51:29 +0200885 mutex_lock(&rdev->devlist_mtx);
Johannes Berg667503dd2009-07-07 03:56:11 +0200886 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200887 switch (wdev->iftype) {
Johannes Berg29cbe682010-12-03 09:20:44 +0100888#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +0200889 case NL80211_IFTYPE_ADHOC:
Johannes Bergfffd0932009-07-08 14:22:54 +0200890 cfg80211_ibss_wext_join(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200891 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200892 case NL80211_IFTYPE_STATION:
Johannes Bergfffd0932009-07-08 14:22:54 +0200893 cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200894 break;
Johannes Berg29cbe682010-12-03 09:20:44 +0100895#endif
Javier Cardonac80d5452010-12-16 17:37:49 -0800896#ifdef CONFIG_MAC80211_MESH
Johannes Berg29cbe682010-12-03 09:20:44 +0100897 case NL80211_IFTYPE_MESH_POINT:
Javier Cardonac80d5452010-12-16 17:37:49 -0800898 {
899 /* backward compat code... */
900 struct mesh_setup setup;
901 memcpy(&setup, &default_mesh_setup,
902 sizeof(setup));
903 /* back compat only needed for mesh_id */
904 setup.mesh_id = wdev->ssid;
905 setup.mesh_id_len = wdev->mesh_id_up_len;
906 if (wdev->mesh_id_up_len)
907 __cfg80211_join_mesh(rdev, dev,
908 &setup,
909 &default_mesh_config);
910 break;
911 }
912#endif
Johannes Bergf2129352009-07-01 21:26:56 +0200913 default:
914 break;
915 }
Johannes Berg667503dd2009-07-07 03:56:11 +0200916 wdev_unlock(wdev);
Johannes Bergad002392009-08-18 19:51:57 +0200917 rdev->opencount++;
Johannes Bergaee83ea2009-08-09 11:51:29 +0200918 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg667503dd2009-07-07 03:56:11 +0200919 cfg80211_unlock_rdev(rdev);
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +0200920
921 /*
922 * Configure power management to the driver here so that its
923 * correctly set also after interface type changes etc.
924 */
Eliad Peller5966f2d2011-07-19 12:57:13 +0300925 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
926 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +0200927 rdev->ops->set_power_mgmt)
928 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
929 wdev->ps,
930 wdev->ps_timeout)) {
931 /* assume this means it's off */
932 wdev->ps = false;
933 }
Johannes Berg2a783c12009-07-01 21:26:45 +0200934 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700935 case NETDEV_UNREGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200936 /*
937 * NB: cannot take rdev->mtx here because this may be
938 * called within code protected by it when interfaces
939 * are removed with nl80211.
940 */
Johannes Berg704232c2007-04-23 12:20:05 -0700941 mutex_lock(&rdev->devlist_mtx);
Johannes Berge40cbdac2009-07-30 14:04:01 +0200942 /*
943 * It is possible to get NETDEV_UNREGISTER
944 * multiple times. To detect that, check
945 * that the interface is still on the list
946 * of registered interfaces, and only then
947 * remove and clean it up.
948 */
Johannes Berg2a783c12009-07-01 21:26:45 +0200949 if (!list_empty(&wdev->list)) {
Johannes Berg704232c2007-04-23 12:20:05 -0700950 sysfs_remove_link(&dev->dev.kobj, "phy80211");
Johannes Berg5f2aa252010-01-17 15:49:02 +0100951 list_del_rcu(&wdev->list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200952 rdev->devlist_generation++;
Johannes Berg2e161f72010-08-12 15:38:38 +0200953 cfg80211_mlme_purge_registrations(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200954#ifdef CONFIG_CFG80211_WEXT
Johannes Berge40cbdac2009-07-30 14:04:01 +0200955 kfree(wdev->wext.keys);
956#endif
Johannes Berg704232c2007-04-23 12:20:05 -0700957 }
958 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100959 /*
960 * synchronise (so that we won't find this netdev
961 * from other code any more) and then clear the list
962 * head so that the above code can safely check for
963 * !list_empty() to avoid double-cleanup.
964 */
965 synchronize_rcu();
966 INIT_LIST_HEAD(&wdev->list);
Johannes Berg704232c2007-04-23 12:20:05 -0700967 break;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200968 case NETDEV_PRE_UP:
Johannes Berg0b20633d2009-07-07 03:56:13 +0200969 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
970 return notifier_from_errno(-EOPNOTSUPP);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200971 if (rfkill_blocked(rdev->rfkill))
972 return notifier_from_errno(-ERFKILL);
Johannes Berg7527a782011-05-13 10:58:57 +0200973 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
974 if (ret)
975 return notifier_from_errno(ret);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200976 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700977 }
978
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200979 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700980}
981
982static struct notifier_block cfg80211_netdev_notifier = {
983 .notifier_call = cfg80211_netdev_notifier_call,
984};
985
Johannes Berg463d0182009-07-14 00:33:35 +0200986static void __net_exit cfg80211_pernet_exit(struct net *net)
987{
988 struct cfg80211_registered_device *rdev;
989
990 rtnl_lock();
991 mutex_lock(&cfg80211_mutex);
992 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
993 if (net_eq(wiphy_net(&rdev->wiphy), net))
994 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
995 }
996 mutex_unlock(&cfg80211_mutex);
997 rtnl_unlock();
998}
999
1000static struct pernet_operations cfg80211_pernet_ops = {
1001 .exit = cfg80211_pernet_exit,
1002};
1003
1004static int __init cfg80211_init(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001005{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001006 int err;
1007
Johannes Berg463d0182009-07-14 00:33:35 +02001008 err = register_pernet_device(&cfg80211_pernet_ops);
1009 if (err)
1010 goto out_fail_pernet;
1011
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001012 err = wiphy_sysfs_init();
Johannes Berg704232c2007-04-23 12:20:05 -07001013 if (err)
1014 goto out_fail_sysfs;
1015
1016 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1017 if (err)
1018 goto out_fail_notifier;
1019
Johannes Berg55682962007-09-20 13:09:35 -04001020 err = nl80211_init();
1021 if (err)
1022 goto out_fail_nl80211;
1023
Johannes Berg704232c2007-04-23 12:20:05 -07001024 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1025
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001026 err = regulatory_init();
1027 if (err)
1028 goto out_fail_reg;
1029
Alban Browaeyse60d7442009-11-25 15:13:00 +01001030 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1031 if (!cfg80211_wq)
1032 goto out_fail_wq;
1033
Johannes Berg704232c2007-04-23 12:20:05 -07001034 return 0;
1035
Alban Browaeyse60d7442009-11-25 15:13:00 +01001036out_fail_wq:
1037 regulatory_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001038out_fail_reg:
1039 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -04001040out_fail_nl80211:
1041 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
Johannes Berg704232c2007-04-23 12:20:05 -07001042out_fail_notifier:
1043 wiphy_sysfs_exit();
1044out_fail_sysfs:
Johannes Berg463d0182009-07-14 00:33:35 +02001045 unregister_pernet_device(&cfg80211_pernet_ops);
1046out_fail_pernet:
Johannes Berg704232c2007-04-23 12:20:05 -07001047 return err;
1048}
Johannes Berg3a462462007-09-10 13:44:45 +02001049subsys_initcall(cfg80211_init);
Johannes Berg704232c2007-04-23 12:20:05 -07001050
Uwe Kleine-Königf884e382010-06-18 09:38:54 +02001051static void __exit cfg80211_exit(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001052{
1053 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -04001054 nl80211_exit();
Johannes Berg704232c2007-04-23 12:20:05 -07001055 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1056 wiphy_sysfs_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001057 regulatory_exit();
Johannes Berg463d0182009-07-14 00:33:35 +02001058 unregister_pernet_device(&cfg80211_pernet_ops);
Alban Browaeyse60d7442009-11-25 15:13:00 +01001059 destroy_workqueue(cfg80211_wq);
Johannes Berg704232c2007-04-23 12:20:05 -07001060}
1061module_exit(cfg80211_exit);