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 SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
  37
  38 static ssize_t addresses_show(struct device *dev,
  39                               struct device_attribute *attr,
  40                               char *buf)
  41 {
  42         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  43         char *start = buf;
  44         int i;
  45
  46         if (!wiphy->addresses)
  47                 return sprintf(buf, "%pM\n", wiphy->perm_addr);
  48
  49         for (i = 0; i < wiphy->n_addresses; i++)
  50                 buf += sprintf(buf, "%pM\n", &wiphy->addresses[i].addr);
  51
  52         return buf - start;
  53 }
  54
  55 static struct device_attribute ieee80211_dev_attrs[] = {
  56         __ATTR_RO(index),
  57         __ATTR_RO(macaddress),
  58         __ATTR_RO(address_mask),
  59         __ATTR_RO(addresses),
  60         {}
  61 };
  62
  63 static void wiphy_dev_release(struct device *dev)
  64 {
  65         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  66
  67         cfg80211_dev_free(rdev);
  68 }
  69
  70 #ifdef CONFIG_HOTPLUG
  71 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
  72 {
  73         /* TODO, we probably need stuff here */
  74         return 0;
  75 }
  76 #endif
  77
  78 static int wiphy_suspend(struct device *dev, pm_message_t state)
  79 {
  80         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  81         int ret = 0;
  82
  83         rdev->suspend_at = get_seconds();
  84
  85         if (rdev->ops->suspend) {
  86                 rtnl_lock();
  87                 ret = rdev->ops->suspend(&rdev->wiphy);
  88                 rtnl_unlock();
  89         }
  90
  91         return ret;
  92 }
  93
  94 static int wiphy_resume(struct device *dev)
  95 {
  96         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  97         int ret = 0;
  98
  99         /* Age scan results with time spent in suspend */
 100         spin_lock_bh(&rdev->bss_lock);
 101         cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
 102         spin_unlock_bh(&rdev->bss_lock);
 103
 104         if (rdev->ops->resume) {
 105                 rtnl_lock();
 106                 ret = rdev->ops->resume(&rdev->wiphy);
 107                 rtnl_unlock();
 108         }
 109
 110         return ret;
 111 }
 112
 113 struct class ieee80211_class = {
 114         .name = "ieee80211",
 115         .owner = THIS_MODULE,
 116         .dev_release = wiphy_dev_release,
 117         .dev_attrs = ieee80211_dev_attrs,
 118 #ifdef CONFIG_HOTPLUG
 119         .dev_uevent = wiphy_uevent,
 120 #endif
 121         .suspend = wiphy_suspend,
 122         .resume = wiphy_resume,
 123 };
 124
 125 int wiphy_sysfs_init(void)
 126 {
 127         return class_register(&ieee80211_class);
 128 }
 129
 130 void wiphy_sysfs_exit(void)
 131 {
 132         class_unregister(&ieee80211_class);
 133 }