blob: 7fdb9409ad2ab251cefe2699f3abbc6bb4c8bee5 [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>
11#include <linux/nl80211.h>
12#include <linux/debugfs.h>
13#include <linux/notifier.h>
14#include <linux/device.h>
Zhu Yi16a832e2009-08-19 16:08:22 +080015#include <linux/etherdevice.h>
Johannes Berg1f87f7d2009-06-02 13:01:41 +020016#include <linux/rtnetlink.h>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +040017#include <linux/sched.h>
Johannes Berg704232c2007-04-23 12:20:05 -070018#include <net/genetlink.h>
19#include <net/cfg80211.h>
Johannes Berg55682962007-09-20 13:09:35 -040020#include "nl80211.h"
Johannes Berg704232c2007-04-23 12:20:05 -070021#include "core.h"
22#include "sysfs.h"
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -040023#include "debugfs.h"
Johannes Berga9a11622009-07-27 12:01:53 +020024#include "wext-compat.h"
John W. Linville4890e3b2009-09-30 14:50:17 -040025#include "ethtool.h"
Johannes Berg704232c2007-04-23 12:20:05 -070026
27/* name for sysfs, %d is appended */
28#define PHY_NAME "phy"
29
30MODULE_AUTHOR("Johannes Berg");
31MODULE_LICENSE("GPL");
32MODULE_DESCRIPTION("wireless configuration support");
33
Johannes Berg5f2aa252010-01-17 15:49:02 +010034/* RCU-protected (and cfg80211_mutex for writers) */
Johannes Berg79c97e92009-07-07 03:56:12 +020035LIST_HEAD(cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +020036int cfg80211_rdev_list_generation;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050037
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050038DEFINE_MUTEX(cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -070039
40/* for debugfs */
41static struct dentry *ieee80211_debugfs_dir;
42
Alban Browaeyse60d7442009-11-25 15:13:00 +010043/* for the cleanup, scan and event works */
44struct workqueue_struct *cfg80211_wq;
45
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050046/* requires cfg80211_mutex to be held! */
Johannes Berg79c97e92009-07-07 03:56:12 +020047struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
Johannes Berg55682962007-09-20 13:09:35 -040048{
Johannes Berg79c97e92009-07-07 03:56:12 +020049 struct cfg80211_registered_device *result = NULL, *rdev;
Johannes Berg55682962007-09-20 13:09:35 -040050
Luis R. Rodriguez85fd1292009-02-21 00:04:20 -050051 if (!wiphy_idx_valid(wiphy_idx))
52 return NULL;
53
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -050054 assert_cfg80211_lock();
55
Johannes Berg79c97e92009-07-07 03:56:12 +020056 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
57 if (rdev->wiphy_idx == wiphy_idx) {
58 result = rdev;
Johannes Berg55682962007-09-20 13:09:35 -040059 break;
60 }
61 }
62
63 return result;
64}
65
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050066int get_wiphy_idx(struct wiphy *wiphy)
67{
Johannes Berg79c97e92009-07-07 03:56:12 +020068 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050069 if (!wiphy)
70 return WIPHY_IDX_STALE;
Johannes Berg79c97e92009-07-07 03:56:12 +020071 rdev = wiphy_to_dev(wiphy);
72 return rdev->wiphy_idx;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050073}
74
Johannes Berg79c97e92009-07-07 03:56:12 +020075/* requires cfg80211_rdev_mutex to be held! */
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050076struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
77{
Johannes Berg79c97e92009-07-07 03:56:12 +020078 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050079
80 if (!wiphy_idx_valid(wiphy_idx))
81 return NULL;
82
83 assert_cfg80211_lock();
84
Johannes Berg79c97e92009-07-07 03:56:12 +020085 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
86 if (!rdev)
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050087 return NULL;
Johannes Berg79c97e92009-07-07 03:56:12 +020088 return &rdev->wiphy;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050089}
90
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050091/* requires cfg80211_mutex to be held! */
Johannes Berg4bbf4d52009-03-24 09:35:46 +010092struct cfg80211_registered_device *
Johannes Berg79c97e92009-07-07 03:56:12 +020093__cfg80211_rdev_from_info(struct genl_info *info)
Johannes Berg55682962007-09-20 13:09:35 -040094{
95 int ifindex;
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -050096 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
Johannes Berg55682962007-09-20 13:09:35 -040097 struct net_device *dev;
98 int err = -EINVAL;
99
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500100 assert_cfg80211_lock();
101
Johannes Berg55682962007-09-20 13:09:35 -0400102 if (info->attrs[NL80211_ATTR_WIPHY]) {
Johannes Berg79c97e92009-07-07 03:56:12 +0200103 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
Johannes Berg55682962007-09-20 13:09:35 -0400104 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
105 err = -ENODEV;
106 }
107
108 if (info->attrs[NL80211_ATTR_IFINDEX]) {
109 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
Johannes Berg463d0182009-07-14 00:33:35 +0200110 dev = dev_get_by_index(genl_info_net(info), ifindex);
Johannes Berg55682962007-09-20 13:09:35 -0400111 if (dev) {
112 if (dev->ieee80211_ptr)
113 byifidx =
114 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
115 dev_put(dev);
116 }
117 err = -ENODEV;
118 }
119
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500120 if (bywiphyidx && byifidx) {
121 if (bywiphyidx != byifidx)
Johannes Berg55682962007-09-20 13:09:35 -0400122 return ERR_PTR(-EINVAL);
123 else
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500124 return bywiphyidx; /* == byifidx */
Johannes Berg55682962007-09-20 13:09:35 -0400125 }
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500126 if (bywiphyidx)
127 return bywiphyidx;
Johannes Berg55682962007-09-20 13:09:35 -0400128
129 if (byifidx)
130 return byifidx;
131
132 return ERR_PTR(err);
133}
134
135struct cfg80211_registered_device *
136cfg80211_get_dev_from_info(struct genl_info *info)
137{
Johannes Berg79c97e92009-07-07 03:56:12 +0200138 struct cfg80211_registered_device *rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400139
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500140 mutex_lock(&cfg80211_mutex);
Johannes Berg79c97e92009-07-07 03:56:12 +0200141 rdev = __cfg80211_rdev_from_info(info);
Johannes Berg55682962007-09-20 13:09:35 -0400142
143 /* if it is not an error we grab the lock on
144 * it to assure it won't be going away while
145 * we operate on it */
Johannes Berg79c97e92009-07-07 03:56:12 +0200146 if (!IS_ERR(rdev))
147 mutex_lock(&rdev->mtx);
Johannes Berg55682962007-09-20 13:09:35 -0400148
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500149 mutex_unlock(&cfg80211_mutex);
Johannes Berg55682962007-09-20 13:09:35 -0400150
Johannes Berg79c97e92009-07-07 03:56:12 +0200151 return rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400152}
153
154struct cfg80211_registered_device *
Johannes Berg463d0182009-07-14 00:33:35 +0200155cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
Johannes Berg55682962007-09-20 13:09:35 -0400156{
Johannes Berg79c97e92009-07-07 03:56:12 +0200157 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
Johannes Berg55682962007-09-20 13:09:35 -0400158 struct net_device *dev;
159
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500160 mutex_lock(&cfg80211_mutex);
Johannes Berg463d0182009-07-14 00:33:35 +0200161 dev = dev_get_by_index(net, ifindex);
Johannes Berg55682962007-09-20 13:09:35 -0400162 if (!dev)
163 goto out;
164 if (dev->ieee80211_ptr) {
Johannes Berg79c97e92009-07-07 03:56:12 +0200165 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
166 mutex_lock(&rdev->mtx);
Johannes Berg55682962007-09-20 13:09:35 -0400167 } else
Johannes Berg79c97e92009-07-07 03:56:12 +0200168 rdev = ERR_PTR(-ENODEV);
Johannes Berg55682962007-09-20 13:09:35 -0400169 dev_put(dev);
170 out:
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500171 mutex_unlock(&cfg80211_mutex);
Johannes Berg79c97e92009-07-07 03:56:12 +0200172 return rdev;
Johannes Berg55682962007-09-20 13:09:35 -0400173}
174
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100175/* requires cfg80211_mutex to be held */
Johannes Berg55682962007-09-20 13:09:35 -0400176int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
177 char *newname)
178{
Johannes Berg79c97e92009-07-07 03:56:12 +0200179 struct cfg80211_registered_device *rdev2;
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500180 int wiphy_idx, taken = -1, result, digits;
Johannes Berg55682962007-09-20 13:09:35 -0400181
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100182 assert_cfg80211_lock();
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700183
Johannes Berg55682962007-09-20 13:09:35 -0400184 /* prohibit calling the thing phy%d when %d is not its number */
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500185 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
186 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
187 /* count number of places needed to print wiphy_idx */
Johannes Berg55682962007-09-20 13:09:35 -0400188 digits = 1;
Luis R. Rodriguezb5850a72009-02-21 00:04:19 -0500189 while (wiphy_idx /= 10)
Johannes Berg55682962007-09-20 13:09:35 -0400190 digits++;
191 /*
192 * deny the name if it is phy<idx> where <idx> is printed
193 * without leading zeroes. taken == strlen(newname) here
194 */
195 if (taken == strlen(PHY_NAME) + digits)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100196 return -EINVAL;
Johannes Berg55682962007-09-20 13:09:35 -0400197 }
198
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700199
200 /* Ignore nop renames */
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700201 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100202 return 0;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700203
204 /* Ensure another device does not already have this name. */
Johannes Berg79c97e92009-07-07 03:56:12 +0200205 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
206 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100207 return -EINVAL;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700208
Johannes Berg55682962007-09-20 13:09:35 -0400209 result = device_rename(&rdev->wiphy.dev, newname);
210 if (result)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100211 return result;
Johannes Berg55682962007-09-20 13:09:35 -0400212
Johannes Berg33c03602008-10-08 10:23:48 +0200213 if (rdev->wiphy.debugfsdir &&
214 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
Johannes Berg55682962007-09-20 13:09:35 -0400215 rdev->wiphy.debugfsdir,
216 rdev->wiphy.debugfsdir->d_parent,
217 newname))
218 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
219 newname);
220
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100221 nl80211_notify_dev_rename(rdev);
Johannes Berg55682962007-09-20 13:09:35 -0400222
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100223 return 0;
Johannes Berg55682962007-09-20 13:09:35 -0400224}
225
Johannes Berg463d0182009-07-14 00:33:35 +0200226int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
227 struct net *net)
228{
229 struct wireless_dev *wdev;
230 int err = 0;
231
Johannes Berg5be83de2009-11-19 00:56:28 +0100232 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
Johannes Berg463d0182009-07-14 00:33:35 +0200233 return -EOPNOTSUPP;
234
235 list_for_each_entry(wdev, &rdev->netdev_list, list) {
236 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
237 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
238 if (err)
239 break;
240 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
241 }
242
243 if (err) {
244 /* failed -- clean up to old netns */
245 net = wiphy_net(&rdev->wiphy);
246
247 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
248 list) {
249 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
250 err = dev_change_net_namespace(wdev->netdev, net,
251 "wlan%d");
252 WARN_ON(err);
253 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
254 }
255 }
256
257 wiphy_net_set(&rdev->wiphy, net);
258
259 return err;
260}
261
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200262static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
263{
Johannes Berg79c97e92009-07-07 03:56:12 +0200264 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200265
Johannes Berg79c97e92009-07-07 03:56:12 +0200266 rdev->ops->rfkill_poll(&rdev->wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200267}
268
269static int cfg80211_rfkill_set_block(void *data, bool blocked)
270{
Johannes Berg79c97e92009-07-07 03:56:12 +0200271 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200272 struct wireless_dev *wdev;
273
274 if (!blocked)
275 return 0;
276
277 rtnl_lock();
Johannes Berg79c97e92009-07-07 03:56:12 +0200278 mutex_lock(&rdev->devlist_mtx);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200279
Johannes Berg79c97e92009-07-07 03:56:12 +0200280 list_for_each_entry(wdev, &rdev->netdev_list, list)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200281 dev_close(wdev->netdev);
282
Johannes Berg79c97e92009-07-07 03:56:12 +0200283 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200284 rtnl_unlock();
285
286 return 0;
287}
288
289static void cfg80211_rfkill_sync_work(struct work_struct *work)
290{
Johannes Berg79c97e92009-07-07 03:56:12 +0200291 struct cfg80211_registered_device *rdev;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200292
Johannes Berg79c97e92009-07-07 03:56:12 +0200293 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
294 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200295}
296
Johannes Berg667503dd2009-07-07 03:56:11 +0200297static void cfg80211_event_work(struct work_struct *work)
298{
299 struct cfg80211_registered_device *rdev;
Johannes Berg667503dd2009-07-07 03:56:11 +0200300
301 rdev = container_of(work, struct cfg80211_registered_device,
302 event_work);
303
304 rtnl_lock();
305 cfg80211_lock_rdev(rdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200306
Johannes Berg3d54d252009-08-21 14:51:05 +0200307 cfg80211_process_rdev_events(rdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200308 cfg80211_unlock_rdev(rdev);
309 rtnl_unlock();
310}
311
Johannes Berg704232c2007-04-23 12:20:05 -0700312/* exported functions */
313
David Kilroy3dcf6702009-05-16 23:13:46 +0100314struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
Johannes Berg704232c2007-04-23 12:20:05 -0700315{
Denis ChengRq638af072008-09-23 02:35:37 +0800316 static int wiphy_counter;
317
Johannes Berg79c97e92009-07-07 03:56:12 +0200318 struct cfg80211_registered_device *rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700319 int alloc_size;
320
Johannes Berg0b20633d2009-07-07 03:56:13 +0200321 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
322 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
323 WARN_ON(ops->connect && !ops->disconnect);
324 WARN_ON(ops->join_ibss && !ops->leave_ibss);
325 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
326 WARN_ON(ops->add_station && !ops->del_station);
327 WARN_ON(ops->add_mpath && !ops->del_mpath);
Johannes Berg41ade002007-12-19 02:03:29 +0100328
Johannes Berg79c97e92009-07-07 03:56:12 +0200329 alloc_size = sizeof(*rdev) + sizeof_priv;
Johannes Berg704232c2007-04-23 12:20:05 -0700330
Johannes Berg79c97e92009-07-07 03:56:12 +0200331 rdev = kzalloc(alloc_size, GFP_KERNEL);
332 if (!rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700333 return NULL;
334
Johannes Berg79c97e92009-07-07 03:56:12 +0200335 rdev->ops = ops;
Johannes Berg704232c2007-04-23 12:20:05 -0700336
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500337 mutex_lock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700338
Johannes Berg79c97e92009-07-07 03:56:12 +0200339 rdev->wiphy_idx = wiphy_counter++;
Johannes Berga4d73ee2007-04-26 20:50:35 -0700340
Johannes Berg79c97e92009-07-07 03:56:12 +0200341 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
Denis ChengRq638af072008-09-23 02:35:37 +0800342 wiphy_counter--;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500343 mutex_unlock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700344 /* ugh, wrapped! */
Johannes Berg79c97e92009-07-07 03:56:12 +0200345 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700346 return NULL;
347 }
Johannes Berg704232c2007-04-23 12:20:05 -0700348
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500349 mutex_unlock(&cfg80211_mutex);
Denis ChengRq638af072008-09-23 02:35:37 +0800350
Johannes Berg704232c2007-04-23 12:20:05 -0700351 /* give it a proper name */
Johannes Berg79c97e92009-07-07 03:56:12 +0200352 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
Johannes Berg704232c2007-04-23 12:20:05 -0700353
Johannes Berg79c97e92009-07-07 03:56:12 +0200354 mutex_init(&rdev->mtx);
355 mutex_init(&rdev->devlist_mtx);
356 INIT_LIST_HEAD(&rdev->netdev_list);
357 spin_lock_init(&rdev->bss_lock);
358 INIT_LIST_HEAD(&rdev->bss_list);
359 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
Johannes Berg704232c2007-04-23 12:20:05 -0700360
Johannes Berg3d23e342009-09-29 23:27:28 +0200361#ifdef CONFIG_CFG80211_WEXT
362 rdev->wiphy.wext = &cfg80211_wext_handler;
363#endif
364
Johannes Berg79c97e92009-07-07 03:56:12 +0200365 device_initialize(&rdev->wiphy.dev);
366 rdev->wiphy.dev.class = &ieee80211_class;
367 rdev->wiphy.dev.platform_data = rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700368
Johannes Berg5be83de2009-11-19 00:56:28 +0100369#ifdef CONFIG_CFG80211_DEFAULT_PS
370 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
371#endif
Johannes Berg16cb9d42009-08-12 23:33:20 +0200372
Johannes Berg463d0182009-07-14 00:33:35 +0200373 wiphy_net_set(&rdev->wiphy, &init_net);
374
Johannes Berg79c97e92009-07-07 03:56:12 +0200375 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
376 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
377 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
378 &rdev->rfkill_ops, rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200379
Johannes Berg79c97e92009-07-07 03:56:12 +0200380 if (!rdev->rfkill) {
381 kfree(rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200382 return NULL;
383 }
384
Johannes Berg79c97e92009-07-07 03:56:12 +0200385 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
386 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
387 INIT_WORK(&rdev->event_work, cfg80211_event_work);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200388
Johannes Bergad002392009-08-18 19:51:57 +0200389 init_waitqueue_head(&rdev->dev_wait);
390
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200391 /*
392 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
393 * Fragmentation and RTS threshold are disabled by default with the
394 * special -1 value.
395 */
Johannes Berg79c97e92009-07-07 03:56:12 +0200396 rdev->wiphy.retry_short = 7;
397 rdev->wiphy.retry_long = 4;
398 rdev->wiphy.frag_threshold = (u32) -1;
399 rdev->wiphy.rts_threshold = (u32) -1;
Lukáš Turek81077e82009-12-21 22:50:47 +0100400 rdev->wiphy.coverage_class = 0;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200401
Johannes Berg79c97e92009-07-07 03:56:12 +0200402 return &rdev->wiphy;
Johannes Berg704232c2007-04-23 12:20:05 -0700403}
404EXPORT_SYMBOL(wiphy_new);
405
406int wiphy_register(struct wiphy *wiphy)
407{
Johannes Berg79c97e92009-07-07 03:56:12 +0200408 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700409 int res;
Johannes Berg8318d782008-01-24 19:38:38 +0100410 enum ieee80211_band band;
411 struct ieee80211_supported_band *sband;
412 bool have_band = false;
413 int i;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700414 u16 ifmodes = wiphy->interface_modes;
415
Johannes Bergef15aac2010-01-20 12:02:33 +0100416 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
417 return -EINVAL;
418
419 if (WARN_ON(wiphy->addresses &&
420 !is_zero_ether_addr(wiphy->perm_addr) &&
421 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
422 ETH_ALEN)))
423 return -EINVAL;
424
425 if (wiphy->addresses)
426 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
427
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700428 /* sanity check ifmodes */
429 WARN_ON(!ifmodes);
430 ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
431 if (WARN_ON(ifmodes != wiphy->interface_modes))
432 wiphy->interface_modes = ifmodes;
Johannes Berg8318d782008-01-24 19:38:38 +0100433
434 /* sanity check supported bands/channels */
435 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
436 sband = wiphy->bands[band];
437 if (!sband)
438 continue;
439
440 sband->band = band;
441
Johannes Berg881d9482009-01-21 15:13:48 +0100442 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
Johannes Berg8318d782008-01-24 19:38:38 +0100443 return -EINVAL;
Johannes Berg881d9482009-01-21 15:13:48 +0100444
445 /*
446 * Since we use a u32 for rate bitmaps in
447 * ieee80211_get_response_rate, we cannot
448 * have more than 32 legacy rates.
449 */
450 if (WARN_ON(sband->n_bitrates > 32))
451 return -EINVAL;
Johannes Berg8318d782008-01-24 19:38:38 +0100452
453 for (i = 0; i < sband->n_channels; i++) {
454 sband->channels[i].orig_flags =
455 sband->channels[i].flags;
456 sband->channels[i].orig_mag =
457 sband->channels[i].max_antenna_gain;
458 sband->channels[i].orig_mpwr =
459 sband->channels[i].max_power;
460 sband->channels[i].band = band;
461 }
462
463 have_band = true;
464 }
465
466 if (!have_band) {
467 WARN_ON(1);
468 return -EINVAL;
469 }
470
471 /* check and set up bitrates */
472 ieee80211_set_bitrate_flags(wiphy);
473
Johannes Berg79c97e92009-07-07 03:56:12 +0200474 res = device_add(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700475 if (res)
Johannes Berg2f0accc2009-06-10 16:50:29 +0200476 return res;
Johannes Berg704232c2007-04-23 12:20:05 -0700477
Johannes Berg79c97e92009-07-07 03:56:12 +0200478 res = rfkill_register(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200479 if (res)
480 goto out_rm_dev;
481
Johannes Berg2f0accc2009-06-10 16:50:29 +0200482 mutex_lock(&cfg80211_mutex);
483
484 /* set up regulatory info */
485 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
486
Johannes Berg5f2aa252010-01-17 15:49:02 +0100487 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200488 cfg80211_rdev_list_generation++;
Johannes Berg704232c2007-04-23 12:20:05 -0700489
Johannes Berg2f0accc2009-06-10 16:50:29 +0200490 mutex_unlock(&cfg80211_mutex);
491
Johannes Berg704232c2007-04-23 12:20:05 -0700492 /* add to debugfs */
Johannes Berg79c97e92009-07-07 03:56:12 +0200493 rdev->wiphy.debugfsdir =
494 debugfs_create_dir(wiphy_name(&rdev->wiphy),
Johannes Berg704232c2007-04-23 12:20:05 -0700495 ieee80211_debugfs_dir);
Johannes Berg79c97e92009-07-07 03:56:12 +0200496 if (IS_ERR(rdev->wiphy.debugfsdir))
497 rdev->wiphy.debugfsdir = NULL;
Johannes Berg704232c2007-04-23 12:20:05 -0700498
Johannes Berg5be83de2009-11-19 00:56:28 +0100499 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -0400500 struct regulatory_request request;
501
502 request.wiphy_idx = get_wiphy_idx(wiphy);
503 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
504 request.alpha2[0] = '9';
505 request.alpha2[1] = '9';
506
507 nl80211_send_reg_change_event(&request);
508 }
509
Johannes Berg79c97e92009-07-07 03:56:12 +0200510 cfg80211_debugfs_rdev_add(rdev);
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400511
Johannes Berg2f0accc2009-06-10 16:50:29 +0200512 return 0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200513
514 out_rm_dev:
Johannes Berg79c97e92009-07-07 03:56:12 +0200515 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700516 return res;
517}
518EXPORT_SYMBOL(wiphy_register);
519
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200520void wiphy_rfkill_start_polling(struct wiphy *wiphy)
521{
Johannes Berg79c97e92009-07-07 03:56:12 +0200522 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200523
Johannes Berg79c97e92009-07-07 03:56:12 +0200524 if (!rdev->ops->rfkill_poll)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200525 return;
Johannes Berg79c97e92009-07-07 03:56:12 +0200526 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
527 rfkill_resume_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200528}
529EXPORT_SYMBOL(wiphy_rfkill_start_polling);
530
531void wiphy_rfkill_stop_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 rfkill_pause_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200536}
537EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
538
Johannes Berg704232c2007-04-23 12:20:05 -0700539void wiphy_unregister(struct wiphy *wiphy)
540{
Johannes Berg79c97e92009-07-07 03:56:12 +0200541 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700542
Johannes Berg79c97e92009-07-07 03:56:12 +0200543 rfkill_unregister(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200544
Johannes Bergf16bfc12007-04-26 20:51:12 -0700545 /* protect the device list */
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500546 mutex_lock(&cfg80211_mutex);
Johannes Berg704232c2007-04-23 12:20:05 -0700547
Johannes Bergad002392009-08-18 19:51:57 +0200548 wait_event(rdev->dev_wait, ({
549 int __count;
550 mutex_lock(&rdev->devlist_mtx);
551 __count = rdev->opencount;
552 mutex_unlock(&rdev->devlist_mtx);
553 __count == 0;}));
554
555 mutex_lock(&rdev->devlist_mtx);
Johannes Berg79c97e92009-07-07 03:56:12 +0200556 BUG_ON(!list_empty(&rdev->netdev_list));
Johannes Bergad002392009-08-18 19:51:57 +0200557 mutex_unlock(&rdev->devlist_mtx);
558
559 /*
560 * First remove the hardware from everywhere, this makes
561 * it impossible to find from userspace.
562 */
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100563 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100564 list_del_rcu(&rdev->list);
565 synchronize_rcu();
Johannes Bergf16bfc12007-04-26 20:51:12 -0700566
567 /*
Johannes Berg79c97e92009-07-07 03:56:12 +0200568 * Try to grab rdev->mtx. If a command is still in progress,
Johannes Bergf16bfc12007-04-26 20:51:12 -0700569 * hopefully the driver will refuse it since it's tearing
570 * down the device already. We wait for this command to complete
571 * before unlinking the item from the list.
572 * Note: as codified by the BUG_ON above we cannot get here if
Johannes Bergad002392009-08-18 19:51:57 +0200573 * a virtual interface is still present. Hence, we can only get
574 * to lock contention here if userspace issues a command that
575 * identified the hardware by wiphy index.
Johannes Bergf16bfc12007-04-26 20:51:12 -0700576 */
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200577 cfg80211_lock_rdev(rdev);
Johannes Bergad002392009-08-18 19:51:57 +0200578 /* nothing */
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200579 cfg80211_unlock_rdev(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700580
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800581 /* If this device got a regulatory hint tell core its
582 * free to listen now to a new shiny device regulatory hint */
583 reg_device_remove(wiphy);
584
Johannes Bergf5ea9122009-08-07 16:17:38 +0200585 cfg80211_rdev_list_generation++;
Johannes Berg79c97e92009-07-07 03:56:12 +0200586 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700587
Luis R. Rodrigueza1794392009-02-21 00:04:21 -0500588 mutex_unlock(&cfg80211_mutex);
Johannes Berg66825882009-07-13 13:24:44 +0200589
Johannes Berg36e6fea2009-08-12 22:21:21 +0200590 flush_work(&rdev->scan_done_wk);
Johannes Berg66825882009-07-13 13:24:44 +0200591 cancel_work_sync(&rdev->conn_work);
Johannes Berg66825882009-07-13 13:24:44 +0200592 flush_work(&rdev->event_work);
Johannes Berg704232c2007-04-23 12:20:05 -0700593}
594EXPORT_SYMBOL(wiphy_unregister);
595
Johannes Berg79c97e92009-07-07 03:56:12 +0200596void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700597{
Johannes Berg2a519312009-02-10 21:25:55 +0100598 struct cfg80211_internal_bss *scan, *tmp;
Johannes Berg79c97e92009-07-07 03:56:12 +0200599 rfkill_destroy(rdev->rfkill);
600 mutex_destroy(&rdev->mtx);
601 mutex_destroy(&rdev->devlist_mtx);
602 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
Johannes Berg78c1c7e2009-02-10 21:25:57 +0100603 cfg80211_put_bss(&scan->pub);
Johannes Berg79c97e92009-07-07 03:56:12 +0200604 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700605}
606
607void wiphy_free(struct wiphy *wiphy)
608{
609 put_device(&wiphy->dev);
610}
611EXPORT_SYMBOL(wiphy_free);
612
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200613void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
614{
Johannes Berg79c97e92009-07-07 03:56:12 +0200615 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200616
Johannes Berg79c97e92009-07-07 03:56:12 +0200617 if (rfkill_set_hw_state(rdev->rfkill, blocked))
618 schedule_work(&rdev->rfkill_sync);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200619}
620EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
621
Johannes Bergad002392009-08-18 19:51:57 +0200622static void wdev_cleanup_work(struct work_struct *work)
623{
624 struct wireless_dev *wdev;
625 struct cfg80211_registered_device *rdev;
626
627 wdev = container_of(work, struct wireless_dev, cleanup_work);
628 rdev = wiphy_to_dev(wdev->wiphy);
629
630 cfg80211_lock_rdev(rdev);
631
632 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
633 rdev->scan_req->aborted = true;
Johannes Berg01a0ac42009-08-20 21:36:16 +0200634 ___cfg80211_scan_done(rdev, true);
Johannes Bergad002392009-08-18 19:51:57 +0200635 }
636
637 cfg80211_unlock_rdev(rdev);
638
639 mutex_lock(&rdev->devlist_mtx);
640 rdev->opencount--;
641 mutex_unlock(&rdev->devlist_mtx);
642 wake_up(&rdev->dev_wait);
643
644 dev_put(wdev->netdev);
645}
646
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000647static struct device_type wiphy_type = {
648 .name = "wlan",
649};
650
Johannes Berg704232c2007-04-23 12:20:05 -0700651static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
652 unsigned long state,
653 void *ndev)
654{
655 struct net_device *dev = ndev;
Johannes Berg2a783c12009-07-01 21:26:45 +0200656 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg704232c2007-04-23 12:20:05 -0700657 struct cfg80211_registered_device *rdev;
658
Johannes Berg2a783c12009-07-01 21:26:45 +0200659 if (!wdev)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200660 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700661
Johannes Berg2a783c12009-07-01 21:26:45 +0200662 rdev = wiphy_to_dev(wdev->wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700663
Johannes Berg2a783c12009-07-01 21:26:45 +0200664 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
Johannes Berg60719ff2008-09-16 14:55:09 +0200665
Johannes Berg704232c2007-04-23 12:20:05 -0700666 switch (state) {
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000667 case NETDEV_POST_INIT:
668 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
669 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700670 case NETDEV_REGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200671 /*
672 * NB: cannot take rdev->mtx here because this may be
673 * called within code protected by it when interfaces
674 * are added with nl80211.
675 */
Johannes Berg667503dd2009-07-07 03:56:11 +0200676 mutex_init(&wdev->mtx);
Johannes Bergad002392009-08-18 19:51:57 +0200677 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
Johannes Berg667503dd2009-07-07 03:56:11 +0200678 INIT_LIST_HEAD(&wdev->event_list);
679 spin_lock_init(&wdev->event_lock);
Jouni Malinen026331c2010-02-15 12:53:10 +0200680 INIT_LIST_HEAD(&wdev->action_registrations);
681 spin_lock_init(&wdev->action_registrations_lock);
682
Johannes Berg704232c2007-04-23 12:20:05 -0700683 mutex_lock(&rdev->devlist_mtx);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100684 list_add_rcu(&wdev->list, &rdev->netdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200685 rdev->devlist_generation++;
Johannes Berg463d0182009-07-14 00:33:35 +0200686 /* can only change netns with wiphy */
687 dev->features |= NETIF_F_NETNS_LOCAL;
688
Johannes Berg704232c2007-04-23 12:20:05 -0700689 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
690 "phy80211")) {
691 printk(KERN_ERR "wireless: failed to add phy80211 "
692 "symlink to netdev!\n");
693 }
Johannes Berg2a783c12009-07-01 21:26:45 +0200694 wdev->netdev = dev;
Samuel Ortizb23aa672009-07-01 21:26:54 +0200695 wdev->sme_state = CFG80211_SME_IDLE;
Johannes Bergbc92afd2009-07-01 21:26:57 +0200696 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg3d23e342009-09-29 23:27:28 +0200697#ifdef CONFIG_CFG80211_WEXT
Johannes Berg2a783c12009-07-01 21:26:45 +0200698 wdev->wext.default_key = -1;
699 wdev->wext.default_mgmt_key = -1;
Johannes Bergf2129352009-07-01 21:26:56 +0200700 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Kalle Valoffb9eb32010-02-17 17:58:10 +0200701#endif
702
Johannes Berg5be83de2009-11-19 00:56:28 +0100703 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
Kalle Valoffb9eb32010-02-17 17:58:10 +0200704 wdev->ps = true;
Johannes Berg5be83de2009-11-19 00:56:28 +0100705 else
Kalle Valoffb9eb32010-02-17 17:58:10 +0200706 wdev->ps = false;
707 wdev->ps_timeout = 100;
Johannes Bergbc92afd2009-07-01 21:26:57 +0200708 if (rdev->ops->set_power_mgmt)
709 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
Kalle Valoffb9eb32010-02-17 17:58:10 +0200710 wdev->ps,
711 wdev->ps_timeout)) {
Johannes Bergbc92afd2009-07-01 21:26:57 +0200712 /* assume this means it's off */
Kalle Valoffb9eb32010-02-17 17:58:10 +0200713 wdev->ps = false;
Johannes Bergbc92afd2009-07-01 21:26:57 +0200714 }
Kalle Valoffb9eb32010-02-17 17:58:10 +0200715
John W. Linville4890e3b2009-09-30 14:50:17 -0400716 if (!dev->ethtool_ops)
717 dev->ethtool_ops = &cfg80211_ethtool_ops;
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100718
719 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
720 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
721 dev->priv_flags |= IFF_DONT_BRIDGE;
Johannes Berg704232c2007-04-23 12:20:05 -0700722 break;
Johannes Berg04a773a2009-04-19 21:24:32 +0200723 case NETDEV_GOING_DOWN:
Samuel Ortizb23aa672009-07-01 21:26:54 +0200724 switch (wdev->iftype) {
725 case NL80211_IFTYPE_ADHOC:
726 cfg80211_leave_ibss(rdev, dev, true);
727 break;
728 case NL80211_IFTYPE_STATION:
Johannes Berg667503dd2009-07-07 03:56:11 +0200729 wdev_lock(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200730#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +0200731 kfree(wdev->wext.ie);
732 wdev->wext.ie = NULL;
733 wdev->wext.ie_len = 0;
Johannes Berg0eb14642009-07-02 15:49:03 +0200734 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Johannes Bergf2129352009-07-01 21:26:56 +0200735#endif
Johannes Berg667503dd2009-07-07 03:56:11 +0200736 __cfg80211_disconnect(rdev, dev,
737 WLAN_REASON_DEAUTH_LEAVING, true);
Johannes Berg19957bb2009-07-02 17:20:43 +0200738 cfg80211_mlme_down(rdev, dev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200739 wdev_unlock(wdev);
Samuel Ortizb23aa672009-07-01 21:26:54 +0200740 break;
741 default:
742 break;
743 }
Johannes Berg01a0ac42009-08-20 21:36:16 +0200744 break;
745 case NETDEV_DOWN:
Johannes Bergad002392009-08-18 19:51:57 +0200746 dev_hold(dev);
Alban Browaeyse60d7442009-11-25 15:13:00 +0100747 queue_work(cfg80211_wq, &wdev->cleanup_work);
Johannes Berg04a773a2009-04-19 21:24:32 +0200748 break;
749 case NETDEV_UP:
Johannes Bergad002392009-08-18 19:51:57 +0200750 /*
751 * If we have a really quick DOWN/UP succession we may
752 * have this work still pending ... cancel it and see
753 * if it was pending, in which case we need to account
754 * for some of the work it would have done.
755 */
756 if (cancel_work_sync(&wdev->cleanup_work)) {
757 mutex_lock(&rdev->devlist_mtx);
758 rdev->opencount--;
759 mutex_unlock(&rdev->devlist_mtx);
760 dev_put(dev);
761 }
Johannes Berg667503dd2009-07-07 03:56:11 +0200762 cfg80211_lock_rdev(rdev);
Johannes Bergaee83ea2009-08-09 11:51:29 +0200763 mutex_lock(&rdev->devlist_mtx);
Johannes Berg8c5d9802010-01-11 16:14:57 +0100764#ifdef CONFIG_CFG80211_WEXT
Johannes Berg667503dd2009-07-07 03:56:11 +0200765 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200766 switch (wdev->iftype) {
767 case NL80211_IFTYPE_ADHOC:
Johannes Bergfffd0932009-07-08 14:22:54 +0200768 cfg80211_ibss_wext_join(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200769 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200770 case NL80211_IFTYPE_STATION:
Johannes Bergfffd0932009-07-08 14:22:54 +0200771 cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +0200772 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200773 default:
774 break;
775 }
Johannes Berg667503dd2009-07-07 03:56:11 +0200776 wdev_unlock(wdev);
Johannes Berg8c5d9802010-01-11 16:14:57 +0100777#endif
Johannes Bergad002392009-08-18 19:51:57 +0200778 rdev->opencount++;
Johannes Bergaee83ea2009-08-09 11:51:29 +0200779 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg667503dd2009-07-07 03:56:11 +0200780 cfg80211_unlock_rdev(rdev);
Johannes Berg2a783c12009-07-01 21:26:45 +0200781 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700782 case NETDEV_UNREGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200783 /*
784 * NB: cannot take rdev->mtx here because this may be
785 * called within code protected by it when interfaces
786 * are removed with nl80211.
787 */
Johannes Berg704232c2007-04-23 12:20:05 -0700788 mutex_lock(&rdev->devlist_mtx);
Johannes Berge40cbdac2009-07-30 14:04:01 +0200789 /*
790 * It is possible to get NETDEV_UNREGISTER
791 * multiple times. To detect that, check
792 * that the interface is still on the list
793 * of registered interfaces, and only then
794 * remove and clean it up.
795 */
Johannes Berg2a783c12009-07-01 21:26:45 +0200796 if (!list_empty(&wdev->list)) {
Johannes Berg704232c2007-04-23 12:20:05 -0700797 sysfs_remove_link(&dev->dev.kobj, "phy80211");
Johannes Berg5f2aa252010-01-17 15:49:02 +0100798 list_del_rcu(&wdev->list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200799 rdev->devlist_generation++;
Jouni Malinen026331c2010-02-15 12:53:10 +0200800 cfg80211_mlme_purge_actions(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +0200801#ifdef CONFIG_CFG80211_WEXT
Johannes Berge40cbdac2009-07-30 14:04:01 +0200802 kfree(wdev->wext.keys);
803#endif
Johannes Berg704232c2007-04-23 12:20:05 -0700804 }
805 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100806 /*
807 * synchronise (so that we won't find this netdev
808 * from other code any more) and then clear the list
809 * head so that the above code can safely check for
810 * !list_empty() to avoid double-cleanup.
811 */
812 synchronize_rcu();
813 INIT_LIST_HEAD(&wdev->list);
Johannes Berg704232c2007-04-23 12:20:05 -0700814 break;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200815 case NETDEV_PRE_UP:
Johannes Berg0b20633d2009-07-07 03:56:13 +0200816 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
817 return notifier_from_errno(-EOPNOTSUPP);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200818 if (rfkill_blocked(rdev->rfkill))
819 return notifier_from_errno(-ERFKILL);
820 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700821 }
822
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200823 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700824}
825
826static struct notifier_block cfg80211_netdev_notifier = {
827 .notifier_call = cfg80211_netdev_notifier_call,
828};
829
Johannes Berg463d0182009-07-14 00:33:35 +0200830static void __net_exit cfg80211_pernet_exit(struct net *net)
831{
832 struct cfg80211_registered_device *rdev;
833
834 rtnl_lock();
835 mutex_lock(&cfg80211_mutex);
836 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
837 if (net_eq(wiphy_net(&rdev->wiphy), net))
838 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
839 }
840 mutex_unlock(&cfg80211_mutex);
841 rtnl_unlock();
842}
843
844static struct pernet_operations cfg80211_pernet_ops = {
845 .exit = cfg80211_pernet_exit,
846};
847
848static int __init cfg80211_init(void)
Johannes Berg704232c2007-04-23 12:20:05 -0700849{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700850 int err;
851
Johannes Berg463d0182009-07-14 00:33:35 +0200852 err = register_pernet_device(&cfg80211_pernet_ops);
853 if (err)
854 goto out_fail_pernet;
855
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700856 err = wiphy_sysfs_init();
Johannes Berg704232c2007-04-23 12:20:05 -0700857 if (err)
858 goto out_fail_sysfs;
859
860 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
861 if (err)
862 goto out_fail_notifier;
863
Johannes Berg55682962007-09-20 13:09:35 -0400864 err = nl80211_init();
865 if (err)
866 goto out_fail_nl80211;
867
Johannes Berg704232c2007-04-23 12:20:05 -0700868 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
869
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700870 err = regulatory_init();
871 if (err)
872 goto out_fail_reg;
873
Alban Browaeyse60d7442009-11-25 15:13:00 +0100874 cfg80211_wq = create_singlethread_workqueue("cfg80211");
875 if (!cfg80211_wq)
876 goto out_fail_wq;
877
Johannes Berg704232c2007-04-23 12:20:05 -0700878 return 0;
879
Alban Browaeyse60d7442009-11-25 15:13:00 +0100880out_fail_wq:
881 regulatory_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700882out_fail_reg:
883 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -0400884out_fail_nl80211:
885 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
Johannes Berg704232c2007-04-23 12:20:05 -0700886out_fail_notifier:
887 wiphy_sysfs_exit();
888out_fail_sysfs:
Johannes Berg463d0182009-07-14 00:33:35 +0200889 unregister_pernet_device(&cfg80211_pernet_ops);
890out_fail_pernet:
Johannes Berg704232c2007-04-23 12:20:05 -0700891 return err;
892}
Johannes Berg3a462462007-09-10 13:44:45 +0200893subsys_initcall(cfg80211_init);
Johannes Berg704232c2007-04-23 12:20:05 -0700894
895static void cfg80211_exit(void)
896{
897 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -0400898 nl80211_exit();
Johannes Berg704232c2007-04-23 12:20:05 -0700899 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
900 wiphy_sysfs_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700901 regulatory_exit();
Johannes Berg463d0182009-07-14 00:33:35 +0200902 unregister_pernet_device(&cfg80211_pernet_ops);
Alban Browaeyse60d7442009-11-25 15:13:00 +0100903 destroy_workqueue(cfg80211_wq);
Johannes Berg704232c2007-04-23 12:20:05 -0700904}
905module_exit(cfg80211_exit);