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 #define SHOW_FMT(name, fmt, member)                                     \
  27 static ssize_t name ## _show(struct device *dev,                        \
  28                               struct device_attribute *attr,            \
  29                               char *buf)                                \
  30 {                                                                       \
  31         return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);        \
  32 }
  33
  34 SHOW_FMT(index, "%d", wiphy_idx);
  35 SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
  36
  37 static struct device_attribute ieee80211_dev_attrs[] = {
  38         __ATTR_RO(index),
  39         __ATTR_RO(macaddress),
  40         {}
  41 };
  42
  43 static void wiphy_dev_release(struct device *dev)
  44 {
  45         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  46
  47         cfg80211_dev_free(rdev);
  48 }
  49
  50 #ifdef CONFIG_HOTPLUG
  51 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
  52 {
  53         /* TODO, we probably need stuff here */
  54         return 0;
  55 }
  56 #endif
  57
  58 static int wiphy_suspend(struct device *dev, pm_message_t state)
  59 {
  60         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  61         int ret = 0;
  62
  63         rdev->suspend_at = get_seconds();
  64
  65         if (rdev->ops->suspend) {
  66                 rtnl_lock();
  67                 ret = rdev->ops->suspend(&rdev->wiphy);
  68                 rtnl_unlock();
  69         }
  70
  71         return ret;
  72 }
  73
  74 static int wiphy_resume(struct device *dev)
  75 {
  76         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  77         int ret = 0;
  78
  79         /* Age scan results with time spent in suspend */
  80         spin_lock_bh(&rdev->bss_lock);
  81         cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
  82         spin_unlock_bh(&rdev->bss_lock);
  83
  84         if (rdev->ops->resume) {
  85                 rtnl_lock();
  86                 ret = rdev->ops->resume(&rdev->wiphy);
  87                 rtnl_unlock();
  88         }
  89
  90         return ret;
  91 }
  92
  93 struct class ieee80211_class = {
  94         .name = "ieee80211",
  95         .owner = THIS_MODULE,
  96         .dev_release = wiphy_dev_release,
  97         .dev_attrs = ieee80211_dev_attrs,
  98 #ifdef CONFIG_HOTPLUG
  99         .dev_uevent = wiphy_uevent,
 100 #endif
 101         .suspend = wiphy_suspend,
 102         .resume = wiphy_resume,
 103 };
 104
 105 int wiphy_sysfs_init(void)
 106 {
 107         return class_register(&ieee80211_class);
 108 }
 109
 110 void wiphy_sysfs_exit(void)
 111 {
 112         class_unregister(&ieee80211_class);
 113 }