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 #include "rdev-ops.h"
  20
  21 static inline struct cfg80211_registered_device *dev_to_rdev(
  22         struct device *dev)
  23 {
  24         return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
  25 }
  26
  27 #define SHOW_FMT(name, fmt, member)                                     \
  28 static ssize_t name ## _show(struct device *dev,                        \
  29                               struct device_attribute *attr,            \
  30                               char *buf)                                \
  31 {                                                                       \
  32         return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);        \
  33 }
  34
  35 SHOW_FMT(index, "%d", wiphy_idx);
  36 SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
  37 SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
  38
  39 static ssize_t name_show(struct device *dev,
  40                          struct device_attribute *attr,
  41                          char *buf) {
  42         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  43         return sprintf(buf, "%s\n", dev_name(&wiphy->dev));
  44 }
  45
  46
  47 static ssize_t addresses_show(struct device *dev,
  48                               struct device_attribute *attr,
  49                               char *buf)
  50 {
  51         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  52         char *start = buf;
  53         int i;
  54
  55         if (!wiphy->addresses)
  56                 return sprintf(buf, "%pM\n", wiphy->perm_addr);
  57
  58         for (i = 0; i < wiphy->n_addresses; i++)
  59                 buf += sprintf(buf, "%pM\n", &wiphy->addresses[i].addr);
  60
  61         return buf - start;
  62 }
  63
  64 static struct device_attribute ieee80211_dev_attrs[] = {
  65         __ATTR_RO(index),
  66         __ATTR_RO(macaddress),
  67         __ATTR_RO(address_mask),
  68         __ATTR_RO(addresses),
  69         __ATTR_RO(name),
  70         {}
  71 };
  72
  73 static void wiphy_dev_release(struct device *dev)
  74 {
  75         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  76
  77         cfg80211_dev_free(rdev);
  78 }
  79
  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
  86 #ifdef CONFIG_PM
  87 static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
  88 {
  89         struct wireless_dev *wdev;
  90
  91         list_for_each_entry(wdev, &rdev->wdev_list, list)
  92                 cfg80211_leave(rdev, wdev);
  93 }
  94
  95 static int wiphy_suspend(struct device *dev, pm_message_t state)
  96 {
  97         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  98         int ret = 0;
  99
 100         rdev->suspend_at = get_seconds();
 101
 102         rtnl_lock();
 103         if (rdev->wiphy.registered) {
 104                 if (!rdev->wiphy.wowlan_config)
 105                         cfg80211_leave_all(rdev);
 106                 if (rdev->ops->suspend)
 107                         ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
 108                 if (ret == 1) {
 109                         /* Driver refuse to configure wowlan */
 110                         cfg80211_leave_all(rdev);
 111                         ret = rdev_suspend(rdev, NULL);
 112                 }
 113         }
 114         rtnl_unlock();
 115
 116         return ret;
 117 }
 118
 119 static int wiphy_resume(struct device *dev)
 120 {
 121         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
 122         int ret = 0;
 123
 124         /* Age scan results with time spent in suspend */
 125         cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
 126
 127         if (rdev->ops->resume) {
 128                 rtnl_lock();
 129                 if (rdev->wiphy.registered)
 130                         ret = rdev_resume(rdev);
 131                 rtnl_unlock();
 132         }
 133
 134         return ret;
 135 }
 136 #endif
 137
 138 static const void *wiphy_namespace(struct device *d)
 139 {
 140         struct wiphy *wiphy = container_of(d, struct wiphy, dev);
 141
 142         return wiphy_net(wiphy);
 143 }
 144
 145 struct class ieee80211_class = {
 146         .name = "ieee80211",
 147         .owner = THIS_MODULE,
 148         .dev_release = wiphy_dev_release,
 149         .dev_attrs = ieee80211_dev_attrs,
 150         .dev_uevent = wiphy_uevent,
 151 #ifdef CONFIG_PM
 152         .suspend = wiphy_suspend,
 153         .resume = wiphy_resume,
 154 #endif
 155         .ns_type = &net_ns_type_operations,
 156         .namespace = wiphy_namespace,
 157 };
 158
 159 int wiphy_sysfs_init(void)
 160 {
 161         return class_register(&ieee80211_class);
 162 }
 163
 164 void wiphy_sysfs_exit(void)
 165 {
 166         class_unregister(&ieee80211_class);
 167 }