blob: 9c21ebf9780ea21ff22c9326da29a423061d088b [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
7#include <linux/if.h>
8#include <linux/module.h>
9#include <linux/err.h>
Johannes Berg704232c2007-04-23 12:20:05 -070010#include <linux/list.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090011#include <linux/slab.h>
Johannes Berg704232c2007-04-23 12:20:05 -070012#include <linux/nl80211.h>
13#include <linux/debugfs.h>
14#include <linux/notifier.h>
15#include <linux/device.h>
Zhu Yi16a832e2009-08-19 16:08:22 +080016#include <linux/etherdevice.h>
Johannes Berg1f87f7d2009-06-02 13:01:41 +020017#include <linux/rtnetlink.h>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +040018#include <linux/sched.h>
Johannes Berg704232c2007-04-23 12:20:05 -070019#include <net/genetlink.h>
20#include <net/cfg80211.h>
Johannes Berg55682962007-09-20 13:09:35 -040021#include "nl80211.h"
Johannes Berg704232c2007-04-23 12:20:05 -070022#include "core.h"
23#include "sysfs.h"
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -040024#include "debugfs.h"
Johannes Berga9a11622009-07-27 12:01:53 +020025#include "wext-compat.h"
John W. Linville4890e3b2009-09-30 14:50:17 -040026#include "ethtool.h"
Johannes Berg704232c2007-04-23 12:20:05 -070027
28/* name for sysfs, %d is appended */
29#define PHY_NAME "phy"
30
31MODULE_AUTHOR("Johannes Berg");
32MODULE_LICENSE("GPL");
33MODULE_DESCRIPTION("wireless configuration support");
34
Johannes Berg5f2aa252010-01-17 15:49:02 +010035/* RCU-protected (and cfg80211_mutex for writers) */
Johannes Berg79c97e92009-07-07 03:56:12 +020036LIST_HEAD(cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +020037int cfg80211_rdev_list_generation;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050038
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050039DEFINE_MUTEX(cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -070040
41/* for debugfs */
42static struct dentry *ieee80211_debugfs_dir;
43
Alban Browaeyse60d7442009-11-25 15:13:00 +010044/* for the cleanup, scan and event works */
45struct workqueue_struct *cfg80211_wq;
46
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050047/* requires cfg80211_mutex to be held! */
Johannes Berg79c97e92009-07-07 03:56:12 +020048struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
Johannes Berg55682962007-09-20 13:09:35 -040049{
Johannes Berg79c97e92009-07-07 03:56:12 +020050 struct cfg80211_registered_device *result = NULL, *rdev;
Johannes Berg55682962007-09-20 13:09:35 -040051
Luis R. Rodriguez85fd1292009-02-21 00:04:20 -050052 if (!wiphy_idx_valid(wiphy_idx))
53 return NULL;
54
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -050055 assert_cfg80211_lock();
56
Johannes Berg79c97e92009-07-07 03:56:12 +020057 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
58 if (rdev->wiphy_idx == wiphy_idx) {
59 result = rdev;
Johannes Berg55682962007-09-20 13:09:35 -040060 break;
61 }
62 }
63
64 return result;
65}
66
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050067int get_wiphy_idx(struct wiphy *wiphy)
68{
Johannes Berg79c97e92009-07-07 03:56:12 +020069 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050070 if (!wiphy)
71 return WIPHY_IDX_STALE;
Johannes Berg79c97e92009-07-07 03:56:12 +020072 rdev = wiphy_to_dev(wiphy);
73 return rdev->wiphy_idx;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050074}
75
Johannes Berg79c97e92009-07-07 03:56:12 +020076/* requires cfg80211_rdev_mutex to be held! */
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050077struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
78{
Johannes Berg79c97e92009-07-07 03:56:12 +020079 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050080
81 if (!wiphy_idx_valid(wiphy_idx))
82 return NULL;
83
84 assert_cfg80211_lock();
85
Johannes Berg79c97e92009-07-07 03:56:12 +020086 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
87 if (!rdev)
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050088 return NULL;
Johannes Berg79c97e92009-07-07 03:56:12 +020089 return &rdev->wiphy;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050090}
91
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050092/* requires cfg80211_mutex to be held! */
Johannes Berg4bbf4d52009-03-24 09:35:46 +010093struct cfg80211_registered_device *
Johannes Berg79c97e92009-07-07 03:56:12 +020094__cfg80211_rdev_from_info(struct genl_info *info)
Johannes Berg55682962007-09-20 13:09:35 -040095{
96 int ifindex;
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -050097 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
Johannes Berg55682962007-09-20 13:09:35 -040098 struct net_device *dev;
99 int err = -EINVAL;
100
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500101 assert_cfg80211_lock();
102
Johannes Berg55682962007-09-20 13:09:35 -0400103 if (info->attrs[NL80211_ATTR_WIPHY]) {
Johannes Berg79c97e92009-07-07 03:56:12 +0200104 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
Johannes Berg55682962007-09-20 13:09:35 -0400105 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
106 err = -ENODEV;
107 }
108
109 if (info->attrs[NL80211_ATTR_IFINDEX]) {
110 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
Johannes Berg463d0182009-07-14 00:33:35 +0200111 dev = dev_get_by_index(genl_info_net(info), ifindex);
Johannes Berg55682962007-09-20 13:09:35 -0400112 if (dev) {
113 if (dev->ieee80211_ptr)
114 byifidx =
115 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
116 dev_put(dev);
117 }
118 err = -ENODEV;
119 }
120
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500121 if (bywiphyidx && byifidx) {
122 if (bywiphyidx != byifidx)
Johannes Berg55682962007-09-20 13:09:35 -0400123 return ERR_PTR(-EINVAL);
124 else
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500125 return bywiphyidx; /* == byifidx */
Johannes Berg55682962007-09-20 13:09:35 -0400126 }
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500127 if (bywiphyidx)
128 return bywiphyidx;
Johannes Berg55682962007-09-20 13:09:35 -0400129
130 if (byifidx)
131 return byifidx;
132
133 return ERR_PTR(err);
134}
135
136struct cfg80211_registered_device *
137cfg80211_get_dev_from_info(struct genl_info *info)
138{
Johannes Berg79c97e92009-07-07 03:56:12 +0200139 struct cfg80211_registered_device *rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400140
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500141 mutex_lock(&cfg80211_mutex);
Johannes Berg79c97e92009-07-07 03:56:12 +0200142 rdev = __cfg80211_rdev_from_info(info);
Johannes Berg55682962007-09-20 13:09:35 -0400143
144 /* if it is not an error we grab the lock on
145 * it to assure it won't be going away while
146 * we operate on it */
Johannes Berg79c97e92009-07-07 03:56:12 +0200147 if (!IS_ERR(rdev))
148 mutex_lock(&rdev->mtx);
Johannes Berg55682962007-09-20 13:09:35 -0400149
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500150 mutex_unlock(&cfg80211_mutex);
Johannes Berg55682962007-09-20 13:09:35 -0400151
Johannes Berg79c97e92009-07-07 03:56:12 +0200152 return rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400153}
154
155struct cfg80211_registered_device *
Johannes Berg463d0182009-07-14 00:33:35 +0200156cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
Johannes Berg55682962007-09-20 13:09:35 -0400157{
Johannes Berg79c97e92009-07-07 03:56:12 +0200158 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
Johannes Berg55682962007-09-20 13:09:35 -0400159 struct net_device *dev;
160
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500161 mutex_lock(&cfg80211_mutex);
Johannes Berg463d0182009-07-14 00:33:35 +0200162 dev = dev_get_by_index(net, ifindex);
Johannes Berg55682962007-09-20 13:09:35 -0400163 if (!dev)
164 goto out;
165 if (dev->ieee80211_ptr) {
Johannes Berg79c97e92009-07-07 03:56:12 +0200166 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
167 mutex_lock(&rdev->mtx);
Johannes Berg55682962007-09-20 13:09:35 -0400168 } else
Johannes Berg79c97e92009-07-07 03:56:12 +0200169 rdev = ERR_PTR(-ENODEV);
Johannes Berg55682962007-09-20 13:09:35 -0400170 dev_put(dev);
171 out:
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500172 mutex_unlock(&cfg80211_mutex);
Johannes Berg79c97e92009-07-07 03:56:12 +0200173 return rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400174}
175
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100176/* requires cfg80211_mutex to be held */
Johannes Berg55682962007-09-20 13:09:35 -0400177int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
178 char *newname)
179{
Johannes Berg79c97e92009-07-07 03:56:12 +0200180 struct cfg80211_registered_device *rdev2;
Johannes Berg76232252010-10-11 14:46:52 -0400181 int wiphy_idx, taken = -1, result, digits;
Johannes Berg55682962007-09-20 13:09:35 -0400182
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100183 assert_cfg80211_lock();
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700184
Johannes Berg76232252010-10-11 14:46:52 -0400185 /* prohibit calling the thing phy%d when %d is not its number */
186 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
187 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
188 /* count number of places needed to print wiphy_idx */
189 digits = 1;
190 while (wiphy_idx /= 10)
191 digits++;
192 /*
193 * deny the name if it is phy<idx> where <idx> is printed
194 * without leading zeroes. taken == strlen(newname) here
195 */
196 if (taken == strlen(PHY_NAME) + digits)
197 return -EINVAL;
198 }
199
200
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700201 /* Ignore nop renames */
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700202 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100203 return 0;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700204
205 /* Ensure another device does not already have this name. */
Johannes Berg79c97e92009-07-07 03:56:12 +0200206 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
207 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
Johannes Berg76232252010-10-11 14:46:52 -0400208 return -EINVAL;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700209
Johannes Berg55682962007-09-20 13:09:35 -0400210 result = device_rename(&rdev->wiphy.dev, newname);
211 if (result)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100212 return result;
Johannes Berg55682962007-09-20 13:09:35 -0400213
Johannes Berg33c03602008-10-08 10:23:48 +0200214 if (rdev->wiphy.debugfsdir &&
215 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
Johannes Berg55682962007-09-20 13:09:35 -0400216 rdev->wiphy.debugfsdir,
217 rdev->wiphy.debugfsdir->d_parent,
218 newname))
219 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
220 newname);
221
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100222 nl80211_notify_dev_rename(rdev);
Johannes Berg55682962007-09-20 13:09:35 -0400223
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100224 return 0;
Johannes Berg55682962007-09-20 13:09:35 -0400225}
226
Johannes Berg463d0182009-07-14 00:33:35 +0200227int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
228 struct net *net)
229{
230 struct wireless_dev *wdev;
231 int err = 0;
232
Johannes Berg5be83de2009-11-19 00:56:28 +0100233 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
Johannes Berg463d0182009-07-14 00:33:35 +0200234 return -EOPNOTSUPP;
235
236 list_for_each_entry(wdev, &rdev->netdev_list, list) {
237 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
238 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
239 if (err)
240 break;
241 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
242 }
243
244 if (err) {
245 /* failed -- clean up to old netns */
246 net = wiphy_net(&rdev->wiphy);
247
248 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
249 list) {
250 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
251 err = dev_change_net_namespace(wdev->netdev, net,
252 "wlan%d");
253 WARN_ON(err);
254 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
255 }
Johannes Berg04600792010-08-05 17:45:15 +0200256
257 return err;
Johannes Berg463d0182009-07-14 00:33:35 +0200258 }
259
260 wiphy_net_set(&rdev->wiphy, net);
261
Johannes Berg04600792010-08-05 17:45:15 +0200262 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
263 WARN_ON(err);
264
265 return 0;
Johannes Berg463d0182009-07-14 00:33:35 +0200266}
267
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200268static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
269{
Johannes Berg79c97e92009-07-07 03:56:12 +0200270 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200271
Johannes Berg79c97e92009-07-07 03:56:12 +0200272 rdev->ops->rfkill_poll(&rdev->wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200273}
274
275static int cfg80211_rfkill_set_block(void *data, bool blocked)
276{
Johannes Berg79c97e92009-07-07 03:56:12 +0200277 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200278 struct wireless_dev *wdev;
279
280 if (!blocked)
281 return 0;
282
283 rtnl_lock();
Johannes Berg79c97e92009-07-07 03:56:12 +0200284 mutex_lock(&rdev->devlist_mtx);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200285
Johannes Berg79c97e92009-07-07 03:56:12 +0200286 list_for_each_entry(wdev, &rdev->netdev_list, list)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200287 dev_close(wdev->netdev);
288
Johannes Berg79c97e92009-07-07 03:56:12 +0200289 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200290 rtnl_unlock();
291
292 return 0;
293}
294
295static void cfg80211_rfkill_sync_work(struct work_struct *work)
296{
Johannes Berg79c97e92009-07-07 03:56:12 +0200297 struct cfg80211_registered_device *rdev;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200298
Johannes Berg79c97e92009-07-07 03:56:12 +0200299 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
300 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200301}
302
Johannes Berg667503d2009-07-07 03:56:11 +0200303static void cfg80211_event_work(struct work_struct *work)
304{
305 struct cfg80211_registered_device *rdev;
Johannes Berg667503d2009-07-07 03:56:11 +0200306
307 rdev = container_of(work, struct cfg80211_registered_device,
308 event_work);
309
310 rtnl_lock();
311 cfg80211_lock_rdev(rdev);
Johannes Berg667503d2009-07-07 03:56:11 +0200312
Johannes Berg3d54d252009-08-21 14:51:05 +0200313 cfg80211_process_rdev_events(rdev);
Johannes Berg667503d2009-07-07 03:56:11 +0200314 cfg80211_unlock_rdev(rdev);
315 rtnl_unlock();
316}
317
Johannes Berg704232c2007-04-23 12:20:05 -0700318/* exported functions */
319
David Kilroy3dcf6702009-05-16 23:13:46 +0100320struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
Johannes Berg704232c2007-04-23 12:20:05 -0700321{
Denis ChengRq638af072008-09-23 02:35:37 +0800322 static int wiphy_counter;
Johannes Berg76232252010-10-11 14:46:52 -0400323
324 struct cfg80211_registered_device *rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700325 int alloc_size;
326
Johannes Berg0b20633d2009-07-07 03:56:13 +0200327 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
328 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
329 WARN_ON(ops->connect && !ops->disconnect);
330 WARN_ON(ops->join_ibss && !ops->leave_ibss);
331 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
332 WARN_ON(ops->add_station && !ops->del_station);
333 WARN_ON(ops->add_mpath && !ops->del_mpath);
Johannes Berg41ade002007-12-19 02:03:29 +0100334
Johannes Berg79c97e92009-07-07 03:56:12 +0200335 alloc_size = sizeof(*rdev) + sizeof_priv;
Johannes Berg704232c2007-04-23 12:20:05 -0700336
Johannes Berg79c97e92009-07-07 03:56:12 +0200337 rdev = kzalloc(alloc_size, GFP_KERNEL);
338 if (!rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700339 return NULL;
340
Johannes Berg79c97e92009-07-07 03:56:12 +0200341 rdev->ops = ops;
Johannes Berg704232c2007-04-23 12:20:05 -0700342
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500343 mutex_lock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700344
Johannes Berg79c97e92009-07-07 03:56:12 +0200345 rdev->wiphy_idx = wiphy_counter++;
Johannes Berga4d73ee2007-04-26 20:50:35 -0700346
Johannes Berg79c97e92009-07-07 03:56:12 +0200347 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
Denis ChengRq638af072008-09-23 02:35:37 +0800348 wiphy_counter--;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500349 mutex_unlock(&cfg80211_mutex);
Johannes Berg76232252010-10-11 14:46:52 -0400350 /* ugh, wrapped! */
Johannes Berg79c97e92009-07-07 03:56:12 +0200351 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700352 return NULL;
353 }
Johannes Berg704232c2007-04-23 12:20:05 -0700354
Ben Greear5a254ff2010-09-27 09:07:26 -0700355 mutex_unlock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700356
Johannes Berg76232252010-10-11 14:46:52 -0400357 /* give it a proper name */
358 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
359
Johannes Berg79c97e92009-07-07 03:56:12 +0200360 mutex_init(&rdev->mtx);
361 mutex_init(&rdev->devlist_mtx);
362 INIT_LIST_HEAD(&rdev->netdev_list);
363 spin_lock_init(&rdev->bss_lock);
364 INIT_LIST_HEAD(&rdev->bss_list);
365 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
Johannes Berg704232c2007-04-23 12:20:05 -0700366
Johannes Berg3d23e342009-09-29 23:27:28 +0200367#ifdef CONFIG_CFG80211_WEXT
368 rdev->wiphy.wext = &cfg80211_wext_handler;
369#endif
370
Johannes Berg79c97e92009-07-07 03:56:12 +0200371 device_initialize(&rdev->wiphy.dev);
372 rdev->wiphy.dev.class = &ieee80211_class;
373 rdev->wiphy.dev.platform_data = rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700374
Johannes Berg5be83de2009-11-19 00:56:28 +0100375#ifdef CONFIG_CFG80211_DEFAULT_PS
376 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
377#endif
Johannes Berg16cb9d42009-08-12 23:33:20 +0200378
Johannes Berg463d0182009-07-14 00:33:35 +0200379 wiphy_net_set(&rdev->wiphy, &init_net);
380
Johannes Berg79c97e92009-07-07 03:56:12 +0200381 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
382 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
383 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
384 &rdev->rfkill_ops, rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200385
Johannes Berg79c97e92009-07-07 03:56:12 +0200386 if (!rdev->rfkill) {
387 kfree(rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200388 return NULL;
389 }
390
Johannes Berg79c97e92009-07-07 03:56:12 +0200391 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
392 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
393 INIT_WORK(&rdev->event_work, cfg80211_event_work);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200394
Johannes Bergad002392009-08-18 19:51:57 +0200395 init_waitqueue_head(&rdev->dev_wait);
396
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200397 /*
398 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
399 * Fragmentation and RTS threshold are disabled by default with the
400 * special -1 value.
401 */
Johannes Berg79c97e92009-07-07 03:56:12 +0200402 rdev->wiphy.retry_short = 7;
403 rdev->wiphy.retry_long = 4;
404 rdev->wiphy.frag_threshold = (u32) -1;
405 rdev->wiphy.rts_threshold = (u32) -1;
Lukáš Turek81077e82009-12-21 22:50:47 +0100406 rdev->wiphy.coverage_class = 0;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200407
Johannes Berg79c97e92009-07-07 03:56:12 +0200408 return &rdev->wiphy;
Johannes Berg704232c2007-04-23 12:20:05 -0700409}
410EXPORT_SYMBOL(wiphy_new);
411
412int wiphy_register(struct wiphy *wiphy)
413{
Johannes Berg79c97e92009-07-07 03:56:12 +0200414 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700415 int res;
Johannes Berg8318d782008-01-24 19:38:38 +0100416 enum ieee80211_band band;
417 struct ieee80211_supported_band *sband;
418 bool have_band = false;
419 int i;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700420 u16 ifmodes = wiphy->interface_modes;
421
Johannes Bergef15aac2010-01-20 12:02:33 +0100422 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
423 return -EINVAL;
424
425 if (WARN_ON(wiphy->addresses &&
426 !is_zero_ether_addr(wiphy->perm_addr) &&
427 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
428 ETH_ALEN)))
429 return -EINVAL;
430
431 if (wiphy->addresses)
432 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
433
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700434 /* sanity check ifmodes */
435 WARN_ON(!ifmodes);
Johannes Berg2e161f72010-08-12 15:38:38 +0200436 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700437 if (WARN_ON(ifmodes != wiphy->interface_modes))
438 wiphy->interface_modes = ifmodes;
Johannes Berg8318d782008-01-24 19:38:38 +0100439
440 /* sanity check supported bands/channels */
441 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
442 sband = wiphy->bands[band];
443 if (!sband)
444 continue;
445
446 sband->band = band;
447
Johannes Berg881d9482009-01-21 15:13:48 +0100448 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
Johannes Berg8318d782008-01-24 19:38:38 +0100449 return -EINVAL;
Johannes Berg881d9482009-01-21 15:13:48 +0100450
451 /*
452 * Since we use a u32 for rate bitmaps in
453 * ieee80211_get_response_rate, we cannot
454 * have more than 32 legacy rates.
455 */
456 if (WARN_ON(sband->n_bitrates > 32))
457 return -EINVAL;
Johannes Berg8318d782008-01-24 19:38:38 +0100458
459 for (i = 0; i < sband->n_channels; i++) {
460 sband->channels[i].orig_flags =
461 sband->channels[i].flags;
462 sband->channels[i].orig_mag =
463 sband->channels[i].max_antenna_gain;
464 sband->channels[i].orig_mpwr =
465 sband->channels[i].max_power;
466 sband->channels[i].band = band;
467 }
468
469 have_band = true;
470 }
471
472 if (!have_band) {
473 WARN_ON(1);
474 return -EINVAL;
475 }
476
477 /* check and set up bitrates */
478 ieee80211_set_bitrate_flags(wiphy);
479
Maxime Bizon5a652052010-07-21 17:21:38 +0200480 mutex_lock(&cfg80211_mutex);
481
Johannes Berg79c97e92009-07-07 03:56:12 +0200482 res = device_add(&rdev->wiphy.dev);
John W. Linvillec3d34d52010-08-30 17:36:40 -0400483 if (res) {
484 mutex_unlock(&cfg80211_mutex);
485 return res;
486 }
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200487
Johannes Berg2f0accc2009-06-10 16:50:29 +0200488 /* set up regulatory info */
489 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
490
Johannes Berg5f2aa252010-01-17 15:49:02 +0100491 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200492 cfg80211_rdev_list_generation++;
Johannes Berg704232c2007-04-23 12:20:05 -0700493
494 /* add to debugfs */
Johannes Berg79c97e92009-07-07 03:56:12 +0200495 rdev->wiphy.debugfsdir =
496 debugfs_create_dir(wiphy_name(&rdev->wiphy),
Johannes Berg704232c2007-04-23 12:20:05 -0700497 ieee80211_debugfs_dir);
Johannes Berg79c97e92009-07-07 03:56:12 +0200498 if (IS_ERR(rdev->wiphy.debugfsdir))
499 rdev->wiphy.debugfsdir = NULL;
Johannes Berg704232c2007-04-23 12:20:05 -0700500
Johannes Berg5be83de2009-11-19 00:56:28 +0100501 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -0400502 struct regulatory_request request;
503
504 request.wiphy_idx = get_wiphy_idx(wiphy);
505 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
506 request.alpha2[0] = '9';
507 request.alpha2[1] = '9';
508
509 nl80211_send_reg_change_event(&request);
510 }
511
Johannes Berg79c97e92009-07-07 03:56:12 +0200512 cfg80211_debugfs_rdev_add(rdev);
Maxime Bizon5a652052010-07-21 17:21:38 +0200513 mutex_unlock(&cfg80211_mutex);
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400514
John W. Linvillec3d34d52010-08-30 17:36:40 -0400515 /*
516 * due to a locking dependency this has to be outside of the
517 * cfg80211_mutex lock
518 */
519 res = rfkill_register(rdev->rfkill);
520 if (res)
521 goto out_rm_dev;
522
Johannes Berg2f0accc2009-06-10 16:50:29 +0200523 return 0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200524
Maxime Bizon5a652052010-07-21 17:21:38 +0200525out_rm_dev:
Johannes Berg79c97e92009-07-07 03:56:12 +0200526 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700527 return res;
528}
529EXPORT_SYMBOL(wiphy_register);
530
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200531void wiphy_rfkill_start_polling(struct wiphy *wiphy)
532{
Johannes Berg79c97e92009-07-07 03:56:12 +0200533 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200534
Johannes Berg79c97e92009-07-07 03:56:12 +0200535 if (!rdev->ops->rfkill_poll)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200536 return;
Johannes Berg79c97e92009-07-07 03:56:12 +0200537 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
538 rfkill_resume_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200539}
540EXPORT_SYMBOL(wiphy_rfkill_start_polling);
541
542void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
543{
Johannes Berg79c97e92009-07-07 03:56:12 +0200544 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200545
Johannes Berg79c97e92009-07-07 03:56:12 +0200546 rfkill_pause_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200547}
548EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
549
Johannes Berg704232c2007-04-23 12:20:05 -0700550void wiphy_unregister(struct wiphy *wiphy)
551{
Johannes Berg79c97e92009-07-07 03:56:12 +0200552 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700553
Johannes Berg79c97e92009-07-07 03:56:12 +0200554 rfkill_unregister(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200555
Johannes Bergf16bfc12007-04-26 20:51:12 -0700556 /* protect the device list */
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500557 mutex_lock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700558
Johannes Bergad002392009-08-18 19:51:57 +0200559 wait_event(rdev->dev_wait, ({
560 int __count;
561 mutex_lock(&rdev->devlist_mtx);
562 __count = rdev->opencount;
563 mutex_unlock(&rdev->devlist_mtx);
564 __count == 0;}));
565
566 mutex_lock(&rdev->devlist_mtx);
Johannes Berg79c97e92009-07-07 03:56:12 +0200567 BUG_ON(!list_empty(&rdev->netdev_list));
Johannes Bergad002392009-08-18 19:51:57 +0200568 mutex_unlock(&rdev->devlist_mtx);
569
570 /*
571 * First remove the hardware from everywhere, this makes
572 * it impossible to find from userspace.
573 */
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100574 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100575 list_del_rcu(&rdev->list);
576 synchronize_rcu();
Johannes Bergf16bfc12007-04-26 20:51:12 -0700577
578 /*
Johannes Berg79c97e92009-07-07 03:56:12 +0200579 * Try to grab rdev->mtx. If a command is still in progress,
Johannes Bergf16bfc12007-04-26 20:51:12 -0700580 * hopefully the driver will refuse it since it's tearing
581 * down the device already. We wait for this command to complete
582 * before unlinking the item from the list.
583 * Note: as codified by the BUG_ON above we cannot get here if
Johannes Bergad002392009-08-18 19:51:57 +0200584 * a virtual interface is still present. Hence, we can only get
585 * to lock contention here if userspace issues a command that
586 * identified the hardware by wiphy index.
Johannes Bergf16bfc12007-04-26 20:51:12 -0700587 */
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200588 cfg80211_lock_rdev(rdev);
Johannes Bergad002392009-08-18 19:51:57 +0200589 /* nothing */
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200590 cfg80211_unlock_rdev(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700591
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800592 /* If this device got a regulatory hint tell core its
593 * free to listen now to a new shiny device regulatory hint */
594 reg_device_remove(wiphy);
595
Johannes Bergf5ea9122009-08-07 16:17:38 +0200596 cfg80211_rdev_list_generation++;
Johannes Berg79c97e92009-07-07 03:56:12 +0200597 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700598
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500599 mutex_unlock(&cfg80211_mutex);
Johannes Berg66825882009-07-13 13:24:44 +0200600
Johannes Berg36e6fea2009-08-12 22:21:21 +0200601 flush_work(&rdev->scan_done_wk);
Johannes Berg66825882009-07-13 13:24:44 +0200602 cancel_work_sync(&rdev->conn_work);
Johannes Berg66825882009-07-13 13:24:44 +0200603 flush_work(&rdev->event_work);
Johannes Berg704232c2007-04-23 12:20:05 -0700604}
605EXPORT_SYMBOL(wiphy_unregister);
606
Johannes Berg79c97e92009-07-07 03:56:12 +0200607void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700608{
Johannes Berg2a519312009-02-10 21:25:55 +0100609 struct cfg80211_internal_bss *scan, *tmp;
Johannes Berg79c97e92009-07-07 03:56:12 +0200610 rfkill_destroy(rdev->rfkill);
611 mutex_destroy(&rdev->mtx);
612 mutex_destroy(&rdev->devlist_mtx);
613 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
Johannes Berg78c1c7e2009-02-10 21:25:57 +0100614 cfg80211_put_bss(&scan->pub);
Johannes Berg79c97e92009-07-07 03:56:12 +0200615 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700616}
617
618void wiphy_free(struct wiphy *wiphy)
619{
620 put_device(&wiphy->dev);
621}
622EXPORT_SYMBOL(wiphy_free);
623
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200624void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
625{
Johannes Berg79c97e92009-07-07 03:56:12 +0200626 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200627
Johannes Berg79c97e92009-07-07 03:56:12 +0200628 if (rfkill_set_hw_state(rdev->rfkill, blocked))
629 schedule_work(&rdev->rfkill_sync);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200630}
631EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
632
Johannes Bergad002392009-08-18 19:51:57 +0200633static void wdev_cleanup_work(struct work_struct *work)
634{
635 struct wireless_dev *wdev;
636 struct cfg80211_registered_device *rdev;
637
638 wdev = container_of(work, struct wireless_dev, cleanup_work);
639 rdev = wiphy_to_dev(wdev->wiphy);
640
641 cfg80211_lock_rdev(rdev);
642
643 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
644 rdev->scan_req->aborted = true;
Johannes Berg01a0ac42009-08-20 21:36:16 +0200645 ___cfg80211_scan_done(rdev, true);
Johannes Bergad002392009-08-18 19:51:57 +0200646 }
647
648 cfg80211_unlock_rdev(rdev);
649
650 mutex_lock(&rdev->devlist_mtx);
651 rdev->opencount--;
652 mutex_unlock(&rdev->devlist_mtx);
653 wake_up(&rdev->dev_wait);
654
655 dev_put(wdev->netdev);
656}
657
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000658static struct device_type wiphy_type = {
659 .name = "wlan",
660};
661
Johannes Berg704232c2007-04-23 12:20:05 -0700662static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
663 unsigned long state,
664 void *ndev)
665{
666 struct net_device *dev = ndev;
Johannes Berg2a783c12009-07-01 21:26:45 +0200667 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg704232c2007-04-23 12:20:05 -0700668 struct cfg80211_registered_device *rdev;
669
Johannes Berg2a783c12009-07-01 21:26:45 +0200670 if (!wdev)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200671 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700672
Johannes Berg2a783c12009-07-01 21:26:45 +0200673 rdev = wiphy_to_dev(wdev->wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700674
Johannes Berg2a783c12009-07-01 21:26:45 +0200675 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
Johannes Berg60719ff2008-09-16 14:55:09 +0200676
Johannes Berg704232c2007-04-23 12:20:05 -0700677 switch (state) {
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000678 case NETDEV_POST_INIT:
679 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
680 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700681 case NETDEV_REGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200682 /*
683 * NB: cannot take rdev->mtx here because this may be
684 * called within code protected by it when interfaces
685 * are added with nl80211.
686 */
Johannes Berg667503d2009-07-07 03:56:11 +0200687 mutex_init(&wdev->mtx);
Johannes Bergad002392009-08-18 19:51:57 +0200688 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
Johannes Berg667503d2009-07-07 03:56:11 +0200689 INIT_LIST_HEAD(&wdev->event_list);
690 spin_lock_init(&wdev->event_lock);
Johannes Berg2e161f72010-08-12 15:38:38 +0200691 INIT_LIST_HEAD(&wdev->mgmt_registrations);
692 spin_lock_init(&wdev->mgmt_registrations_lock);
Jouni Malinen026331c2010-02-15 12:53:10 +0200693
Johannes Berg704232c2007-04-23 12:20:05 -0700694 mutex_lock(&rdev->devlist_mtx);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100695 list_add_rcu(&wdev->list, &rdev->netdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200696 rdev->devlist_generation++;
Johannes Berg463d0182009-07-14 00:33:35 +0200697 /* can only change netns with wiphy */
698 dev->features |= NETIF_F_NETNS_LOCAL;
699
Johannes Berg704232c2007-04-23 12:20:05 -0700700 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
701 "phy80211")) {
702 printk(KERN_ERR "wireless: failed to add phy80211 "
703 "symlink to netdev!\n");
704 }
Johannes Berg2a783c12009-07-01 21:26:45 +0200705 wdev->netdev = dev;
Samuel Ortizb23aa672009-07-01 21:26:54 +0200706 wdev->sme_state = CFG80211_SME_IDLE;
Johannes Bergbc92afd2009-07-01 21:26:57 +0200707 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg3d23e342009-09-29 23:27:28 +0200708#ifdef CONFIG_CFG80211_WEXT
Johannes Berg2a783c12009-07-01 21:26:45 +0200709 wdev->wext.default_key = -1;
710 wdev->wext.default_mgmt_key = -1;
Johannes Bergf2129352009-07-01 21:26:56 +0200711 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Kalle Valoffb9eb32010-02-17 17:58:10 +0200712#endif
713
Johannes Berg5be83de2009-11-19 00:56:28 +0100714 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
Kalle Valoffb9eb32010-02-17 17:58:10 +0200715 wdev->ps = true;
Johannes Berg5be83de2009-11-19 00:56:28 +0100716 else
Kalle Valoffb9eb32010-02-17 17:58:10 +0200717 wdev->ps = false;
Juuso Oikarinen9043f3b2010-04-27 12:47:41 +0300718 /* allow mac80211 to determine the timeout */
719 wdev->ps_timeout = -1;
Johannes Bergbc92afd2009-07-01 21:26:57 +0200720 if (rdev->ops->set_power_mgmt)
721 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
Kalle Valoffb9eb32010-02-17 17:58:10 +0200722 wdev->ps,
723 wdev->ps_timeout)) {
Johannes Bergbc92afd2009-07-01 21:26:57 +0200724 /* assume this means it's off */
Kalle Valoffb9eb32010-02-17 17:58:10 +0200725 wdev->ps = false;
Johannes Bergbc92afd2009-07-01 21:26:57 +0200726 }
Kalle Valoffb9eb32010-02-17 17:58:10 +0200727
John W. Linville4890e3b2009-09-30 14:50:17 -0400728 if (!dev->ethtool_ops)
729 dev->ethtool_ops = &cfg80211_ethtool_ops;
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100730
731 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
Johannes Berg074ac8d2010-09-16 14:58:22 +0200732 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100733 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
734 dev->priv_flags |= IFF_DONT_BRIDGE;
Johannes Berg704232c2007-04-23 12:20:05 -0700735 break;
Johannes Berg04a773a2009-04-19 21:24:32 +0200736 case NETDEV_GOING_DOWN:
Samuel Ortizb23aa672009-07-01 21:26:54 +0200737 switch (wdev->iftype) {
738 case NL80211_IFTYPE_ADHOC:
739 cfg80211_leave_ibss(rdev, dev, true);
740 break;
Johannes Berg074ac8d2010-09-16 14:58:22 +0200741 case NL80211_IFTYPE_P2P_CLIENT:
Samuel Ortizb23aa672009-07-01 21:26:54 +0200742 case NL80211_IFTYPE_STATION:
Johannes Berg667503d2009-07-07 03:56:11 +0200743 wdev_lock(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200744#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +0200745 kfree(wdev->wext.ie);
746 wdev->wext.ie = NULL;
747 wdev->wext.ie_len = 0;
Johannes Berg0eb14642009-07-02 15:49:03 +0200748 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Johannes Bergf2129352009-07-01 21:26:56 +0200749#endif
Johannes Berg667503d2009-07-07 03:56:11 +0200750 __cfg80211_disconnect(rdev, dev,
751 WLAN_REASON_DEAUTH_LEAVING, true);
Johannes Berg19957bb2009-07-02 17:20:43 +0200752 cfg80211_mlme_down(rdev, dev);
Johannes Berg667503d2009-07-07 03:56:11 +0200753 wdev_unlock(wdev);
Samuel Ortizb23aa672009-07-01 21:26:54 +0200754 break;
755 default:
756 break;
757 }
Johannes Berg01a0ac42009-08-20 21:36:16 +0200758 break;
759 case NETDEV_DOWN:
Johannes Bergad002392009-08-18 19:51:57 +0200760 dev_hold(dev);
Alban Browaeyse60d7442009-11-25 15:13:00 +0100761 queue_work(cfg80211_wq, &wdev->cleanup_work);
Johannes Berg04a773a2009-04-19 21:24:32 +0200762 break;
763 case NETDEV_UP:
Johannes Bergad002392009-08-18 19:51:57 +0200764 /*
765 * If we have a really quick DOWN/UP succession we may
766 * have this work still pending ... cancel it and see
767 * if it was pending, in which case we need to account
768 * for some of the work it would have done.
769 */
770 if (cancel_work_sync(&wdev->cleanup_work)) {
771 mutex_lock(&rdev->devlist_mtx);
772 rdev->opencount--;
773 mutex_unlock(&rdev->devlist_mtx);
774 dev_put(dev);
775 }
Johannes Berg667503d2009-07-07 03:56:11 +0200776 cfg80211_lock_rdev(rdev);
Johannes Bergaee83ea2009-08-09 11:51:29 +0200777 mutex_lock(&rdev->devlist_mtx);
Johannes Berg8c5d9802010-01-11 16:14:57 +0100778#ifdef CONFIG_CFG80211_WEXT
Johannes Berg667503d2009-07-07 03:56:11 +0200779 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200780 switch (wdev->iftype) {
781 case NL80211_IFTYPE_ADHOC:
Johannes Bergfffd0932009-07-08 14:22:54 +0200782 cfg80211_ibss_wext_join(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200783 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200784 case NL80211_IFTYPE_STATION:
Johannes Bergfffd0932009-07-08 14:22:54 +0200785 cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200786 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200787 default:
788 break;
789 }
Johannes Berg667503d2009-07-07 03:56:11 +0200790 wdev_unlock(wdev);
Johannes Berg8c5d9802010-01-11 16:14:57 +0100791#endif
Johannes Bergad002392009-08-18 19:51:57 +0200792 rdev->opencount++;
Johannes Bergaee83ea2009-08-09 11:51:29 +0200793 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg667503d2009-07-07 03:56:11 +0200794 cfg80211_unlock_rdev(rdev);
Johannes Berg2a783c12009-07-01 21:26:45 +0200795 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700796 case NETDEV_UNREGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200797 /*
798 * NB: cannot take rdev->mtx here because this may be
799 * called within code protected by it when interfaces
800 * are removed with nl80211.
801 */
Johannes Berg704232c2007-04-23 12:20:05 -0700802 mutex_lock(&rdev->devlist_mtx);
Johannes Berge40cbda2009-07-30 14:04:01 +0200803 /*
804 * It is possible to get NETDEV_UNREGISTER
805 * multiple times. To detect that, check
806 * that the interface is still on the list
807 * of registered interfaces, and only then
808 * remove and clean it up.
809 */
Johannes Berg2a783c12009-07-01 21:26:45 +0200810 if (!list_empty(&wdev->list)) {
Johannes Berg704232c2007-04-23 12:20:05 -0700811 sysfs_remove_link(&dev->dev.kobj, "phy80211");
Johannes Berg5f2aa252010-01-17 15:49:02 +0100812 list_del_rcu(&wdev->list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200813 rdev->devlist_generation++;
Johannes Berg2e161f72010-08-12 15:38:38 +0200814 cfg80211_mlme_purge_registrations(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200815#ifdef CONFIG_CFG80211_WEXT
Johannes Berge40cbda2009-07-30 14:04:01 +0200816 kfree(wdev->wext.keys);
817#endif
Johannes Berg704232c2007-04-23 12:20:05 -0700818 }
819 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100820 /*
821 * synchronise (so that we won't find this netdev
822 * from other code any more) and then clear the list
823 * head so that the above code can safely check for
824 * !list_empty() to avoid double-cleanup.
825 */
826 synchronize_rcu();
827 INIT_LIST_HEAD(&wdev->list);
Johannes Berg704232c2007-04-23 12:20:05 -0700828 break;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200829 case NETDEV_PRE_UP:
Johannes Berg0b20633d2009-07-07 03:56:13 +0200830 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
831 return notifier_from_errno(-EOPNOTSUPP);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200832 if (rfkill_blocked(rdev->rfkill))
833 return notifier_from_errno(-ERFKILL);
834 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700835 }
836
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200837 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700838}
839
840static struct notifier_block cfg80211_netdev_notifier = {
841 .notifier_call = cfg80211_netdev_notifier_call,
842};
843
Johannes Berg463d0182009-07-14 00:33:35 +0200844static void __net_exit cfg80211_pernet_exit(struct net *net)
845{
846 struct cfg80211_registered_device *rdev;
847
848 rtnl_lock();
849 mutex_lock(&cfg80211_mutex);
850 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
851 if (net_eq(wiphy_net(&rdev->wiphy), net))
852 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
853 }
854 mutex_unlock(&cfg80211_mutex);
855 rtnl_unlock();
856}
857
858static struct pernet_operations cfg80211_pernet_ops = {
859 .exit = cfg80211_pernet_exit,
860};
861
862static int __init cfg80211_init(void)
Johannes Berg704232c2007-04-23 12:20:05 -0700863{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700864 int err;
865
Johannes Berg463d0182009-07-14 00:33:35 +0200866 err = register_pernet_device(&cfg80211_pernet_ops);
867 if (err)
868 goto out_fail_pernet;
869
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700870 err = wiphy_sysfs_init();
Johannes Berg704232c2007-04-23 12:20:05 -0700871 if (err)
872 goto out_fail_sysfs;
873
874 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
875 if (err)
876 goto out_fail_notifier;
877
Johannes Berg55682962007-09-20 13:09:35 -0400878 err = nl80211_init();
879 if (err)
880 goto out_fail_nl80211;
881
Johannes Berg704232c2007-04-23 12:20:05 -0700882 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
883
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700884 err = regulatory_init();
885 if (err)
886 goto out_fail_reg;
887
Alban Browaeyse60d7442009-11-25 15:13:00 +0100888 cfg80211_wq = create_singlethread_workqueue("cfg80211");
889 if (!cfg80211_wq)
890 goto out_fail_wq;
891
Johannes Berg704232c2007-04-23 12:20:05 -0700892 return 0;
893
Alban Browaeyse60d7442009-11-25 15:13:00 +0100894out_fail_wq:
895 regulatory_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700896out_fail_reg:
897 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -0400898out_fail_nl80211:
899 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
Johannes Berg704232c2007-04-23 12:20:05 -0700900out_fail_notifier:
901 wiphy_sysfs_exit();
902out_fail_sysfs:
Johannes Berg463d0182009-07-14 00:33:35 +0200903 unregister_pernet_device(&cfg80211_pernet_ops);
904out_fail_pernet:
Johannes Berg704232c2007-04-23 12:20:05 -0700905 return err;
906}
Johannes Berg3a462462007-09-10 13:44:45 +0200907subsys_initcall(cfg80211_init);
Johannes Berg704232c2007-04-23 12:20:05 -0700908
Uwe Kleine-Königf884e382010-06-18 09:38:54 +0200909static void __exit cfg80211_exit(void)
Johannes Berg704232c2007-04-23 12:20:05 -0700910{
911 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -0400912 nl80211_exit();
Johannes Berg704232c2007-04-23 12:20:05 -0700913 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
914 wiphy_sysfs_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700915 regulatory_exit();
Johannes Berg463d0182009-07-14 00:33:35 +0200916 unregister_pernet_device(&cfg80211_pernet_ops);
Alban Browaeyse60d7442009-11-25 15:13:00 +0100917 destroy_workqueue(cfg80211_wq);
Johannes Berg704232c2007-04-23 12:20:05 -0700918}
919module_exit(cfg80211_exit);