net/wireless/sysfs.c

   1 /*
   2  * This file provides /sys/class/ieee80211/<wiphy name>/
   3  * and some default attributes.
   4  *
   5  * Copyright 2005-2006  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2006       Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * This file is GPLv2 as found in COPYING.
   9  */
  10
  11 #include <linux/device.h>
  12 #include <linux/module.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <net/cfg80211.h>
  17 #include "sysfs.h"
  18 #include "core.h"
  19
  20 static inline struct cfg80211_registered_device *dev_to_rdev(
  21         struct device *dev)
  22 {
  23         return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
  24 }
  25
  26 static ssize_t _show_index(struct device *dev, struct device_attribute *attr,
  27                            char *buf)
  28 {
  29         return sprintf(buf, "%d\n", dev_to_rdev(dev)->idx);
  30 }
  31
  32 static ssize_t _show_permaddr(struct device *dev,
  33                               struct device_attribute *attr,
  34                               char *buf)
  35 {
  36         unsigned char *addr = dev_to_rdev(dev)->wiphy.perm_addr;
  37
  38         return sprintf(buf, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
  39                        addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
  40 }
  41
  42 static struct device_attribute ieee80211_dev_attrs[] = {
  43         __ATTR(index, S_IRUGO, _show_index, NULL),
  44         __ATTR(macaddress, S_IRUGO, _show_permaddr, NULL),
  45         {}
  46 };
  47
  48 static void wiphy_dev_release(struct device *dev)
  49 {
  50         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  51
  52         cfg80211_dev_free(rdev);
  53 }
  54
  55 static int wiphy_uevent(struct device *dev, char **envp,
  56                         int num_envp, char *buf, int size)
  57 {
  58         /* TODO, we probably need stuff here */
  59         return 0;
  60 }
  61
  62 struct class ieee80211_class = {
  63         .name = "ieee80211",
  64         .owner = THIS_MODULE,
  65         .dev_release = wiphy_dev_release,
  66         .dev_attrs = ieee80211_dev_attrs,
  67 #ifdef CONFIG_HOTPLUG
  68         .dev_uevent = wiphy_uevent,
  69 #endif
  70 };
  71
  72 int wiphy_sysfs_init(void)
  73 {
  74         return class_register(&ieee80211_class);
  75 }
  76
  77 void wiphy_sysfs_exit(void)
  78 {
  79         class_unregister(&ieee80211_class);
  80 }