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 name_show(struct device *dev,
  39                          struct device_attribute *attr,
  40                          char *buf) {
  41         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  42         return sprintf(buf, "%s\n", dev_name(&wiphy->dev));
  43 }
  44
  45
  46 static ssize_t addresses_show(struct device *dev,
  47                               struct device_attribute *attr,
  48                               char *buf)
  49 {
  50         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  51         char *start = buf;
  52         int i;
  53
  54         if (!wiphy->addresses)
  55                 return sprintf(buf, "%pM\n", wiphy->perm_addr);
  56
  57         for (i = 0; i < wiphy->n_addresses; i++)
  58                 buf += sprintf(buf, "%pM\n", &wiphy->addresses[i].addr);
  59
  60         return buf - start;
  61 }
  62
  63 static struct device_attribute ieee80211_dev_attrs[] = {
  64         __ATTR_RO(index),
  65         __ATTR_RO(macaddress),
  66         __ATTR_RO(address_mask),
  67         __ATTR_RO(addresses),
  68         __ATTR_RO(name),
  69         {}
  70 };
  71
  72 static void wiphy_dev_release(struct device *dev)
  73 {
  74         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  75
  76         cfg80211_dev_free(rdev);
  77 }
  78
  79 #ifdef CONFIG_HOTPLUG
  80 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
  81 {
  82         /* TODO, we probably need stuff here */
  83         return 0;
  84 }
  85 #endif
  86
  87 static int wiphy_suspend(struct device *dev, pm_message_t state)
  88 {
  89         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  90         int ret = 0;
  91
  92         rdev->suspend_at = get_seconds();
  93
  94         if (rdev->ops->suspend) {
  95                 rtnl_lock();
  96                 ret = rdev->ops->suspend(&rdev->wiphy);
  97                 rtnl_unlock();
  98         }
  99
 100         return ret;
 101 }
 102
 103 static int wiphy_resume(struct device *dev)
 104 {
 105         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
 106         int ret = 0;
 107
 108         /* Age scan results with time spent in suspend */
 109         spin_lock_bh(&rdev->bss_lock);
 110         cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
 111         spin_unlock_bh(&rdev->bss_lock);
 112
 113         if (rdev->ops->resume) {
 114                 rtnl_lock();
 115                 ret = rdev->ops->resume(&rdev->wiphy);
 116                 rtnl_unlock();
 117         }
 118
 119         return ret;
 120 }
 121
 122 static const void *wiphy_namespace(struct device *d)
 123 {
 124         struct wiphy *wiphy = container_of(d, struct wiphy, dev);
 125
 126         return wiphy_net(wiphy);
 127 }
 128
 129 struct class ieee80211_class = {
 130         .name = "ieee80211",
 131         .owner = THIS_MODULE,
 132         .dev_release = wiphy_dev_release,
 133         .dev_attrs = ieee80211_dev_attrs,
 134 #ifdef CONFIG_HOTPLUG
 135         .dev_uevent = wiphy_uevent,
 136 #endif
 137         .suspend = wiphy_suspend,
 138         .resume = wiphy_resume,
 139         .ns_type = &net_ns_type_operations,
 140         .namespace = wiphy_namespace,
 141 };
 142
 143 int wiphy_sysfs_init(void)
 144 {
 145         return class_register(&ieee80211_class);
 146 }
 147
 148 void wiphy_sysfs_exit(void)
 149 {
 150         class_unregister(&ieee80211_class);
 151 }