2 * This is the linux wireless configuration interface.
4 * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
8 #include <linux/module.h>
10 #include <linux/mutex.h>
11 #include <linux/list.h>
12 #include <linux/nl80211.h>
13 #include <linux/debugfs.h>
14 #include <linux/notifier.h>
15 #include <linux/device.h>
16 #include <net/genetlink.h>
17 #include <net/cfg80211.h>
18 #include <net/wireless.h>
22 /* name for sysfs, %d is appended */
23 #define PHY_NAME "phy"
25 MODULE_AUTHOR("Johannes Berg");
26 MODULE_LICENSE("GPL");
27 MODULE_DESCRIPTION("wireless configuration support");
29 /* RCU might be appropriate here since we usually
30 * only read the list, and that can happen quite
31 * often because we need to do it for each command */
32 LIST_HEAD(cfg80211_drv_list);
33 DEFINE_MUTEX(cfg80211_drv_mutex);
34 static int wiphy_counter;
37 static struct dentry *ieee80211_debugfs_dir;
39 /* exported functions */
41 struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv)
43 struct cfg80211_registered_device *drv;
46 alloc_size = sizeof(*drv) + sizeof_priv;
48 drv = kzalloc(alloc_size, GFP_KERNEL);
54 mutex_lock(&cfg80211_drv_mutex);
56 if (unlikely(wiphy_counter<0)) {
61 drv->idx = wiphy_counter;
63 /* give it a proper name */
64 snprintf(drv->wiphy.dev.bus_id, BUS_ID_SIZE,
65 PHY_NAME "%d", drv->idx);
67 /* now increase counter for the next time */
69 mutex_unlock(&cfg80211_drv_mutex);
71 mutex_init(&drv->mtx);
72 mutex_init(&drv->devlist_mtx);
73 INIT_LIST_HEAD(&drv->netdev_list);
75 device_initialize(&drv->wiphy.dev);
76 drv->wiphy.dev.class = &ieee80211_class;
77 drv->wiphy.dev.platform_data = drv;
81 EXPORT_SYMBOL(wiphy_new);
83 int wiphy_register(struct wiphy *wiphy)
85 struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy);
88 mutex_lock(&cfg80211_drv_mutex);
91 res = device_add(&drv->wiphy.dev);
95 list_add(&drv->list, &cfg80211_drv_list);
98 drv->wiphy.debugfsdir =
99 debugfs_create_dir(wiphy_name(&drv->wiphy),
100 ieee80211_debugfs_dir);
104 mutex_unlock(&cfg80211_drv_mutex);
107 EXPORT_SYMBOL(wiphy_register);
109 void wiphy_unregister(struct wiphy *wiphy)
111 struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy);
113 mutex_lock(&cfg80211_drv_mutex);
115 /* hold registered driver mutex during list removal as well
116 * to make sure no commands are in progress at the moment */
117 mutex_lock(&drv->mtx);
118 list_del(&drv->list);
119 mutex_unlock(&drv->mtx);
121 device_del(&drv->wiphy.dev);
122 debugfs_remove(drv->wiphy.debugfsdir);
124 mutex_unlock(&cfg80211_drv_mutex);
126 EXPORT_SYMBOL(wiphy_unregister);
128 void cfg80211_dev_free(struct cfg80211_registered_device *drv)
130 mutex_destroy(&drv->mtx);
131 mutex_destroy(&drv->devlist_mtx);
135 void wiphy_free(struct wiphy *wiphy)
137 put_device(&wiphy->dev);
139 EXPORT_SYMBOL(wiphy_free);
141 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
145 struct net_device *dev = ndev;
146 struct cfg80211_registered_device *rdev;
148 if (!dev->ieee80211_ptr)
151 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
154 case NETDEV_REGISTER:
155 mutex_lock(&rdev->devlist_mtx);
156 list_add(&dev->ieee80211_ptr->list, &rdev->netdev_list);
157 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
159 printk(KERN_ERR "wireless: failed to add phy80211 "
160 "symlink to netdev!\n");
162 dev->ieee80211_ptr->netdev = dev;
163 mutex_unlock(&rdev->devlist_mtx);
165 case NETDEV_UNREGISTER:
166 mutex_lock(&rdev->devlist_mtx);
167 if (!list_empty(&dev->ieee80211_ptr->list)) {
168 sysfs_remove_link(&dev->dev.kobj, "phy80211");
169 list_del_init(&dev->ieee80211_ptr->list);
171 mutex_unlock(&rdev->devlist_mtx);
178 static struct notifier_block cfg80211_netdev_notifier = {
179 .notifier_call = cfg80211_netdev_notifier_call,
182 static int cfg80211_init(void)
184 int err = wiphy_sysfs_init();
188 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
190 goto out_fail_notifier;
192 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
201 module_init(cfg80211_init);
203 static void cfg80211_exit(void)
205 debugfs_remove(ieee80211_debugfs_dir);
206 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
209 module_exit(cfg80211_exit);