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 static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
  87 {
  88         struct wireless_dev *wdev;
  89
  90         list_for_each_entry(wdev, &rdev->wdev_list, list)
  91                 cfg80211_leave(rdev, wdev);
  92 }
  93
  94 static int wiphy_suspend(struct device *dev, pm_message_t state)
  95 {
  96         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  97         int ret = 0;
  98
  99         rdev->suspend_at = get_seconds();
 100
 101         rtnl_lock();
 102         if (rdev->wiphy.registered) {
 103                 if (!rdev->wowlan)
 104                         cfg80211_leave_all(rdev);
 105                 if (rdev->ops->suspend)
 106                         ret = rdev_suspend(rdev, rdev->wowlan);
 107                 if (ret == 1) {
 108                         /* Driver refuse to configure wowlan */
 109                         cfg80211_leave_all(rdev);
 110                         ret = rdev_suspend(rdev, NULL);
 111                 }
 112         }
 113         rtnl_unlock();
 114
 115         return ret;
 116 }
 117
 118 static int wiphy_resume(struct device *dev)
 119 {
 120         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
 121         int ret = 0;
 122
 123         /* Age scan results with time spent in suspend */
 124         cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
 125
 126         if (rdev->ops->resume) {
 127                 rtnl_lock();
 128                 if (rdev->wiphy.registered)
 129                         ret = rdev_resume(rdev);
 130                 rtnl_unlock();
 131         }
 132
 133         return ret;
 134 }
 135
 136 static const void *wiphy_namespace(struct device *d)
 137 {
 138         struct wiphy *wiphy = container_of(d, struct wiphy, dev);
 139
 140         return wiphy_net(wiphy);
 141 }
 142
 143 struct class ieee80211_class = {
 144         .name = "ieee80211",
 145         .owner = THIS_MODULE,
 146         .dev_release = wiphy_dev_release,
 147         .dev_attrs = ieee80211_dev_attrs,
 148         .dev_uevent = wiphy_uevent,
 149         .suspend = wiphy_suspend,
 150         .resume = wiphy_resume,
 151         .ns_type = &net_ns_type_operations,
 152         .namespace = wiphy_namespace,
 153 };
 154
 155 int wiphy_sysfs_init(void)
 156 {
 157         return class_register(&ieee80211_class);
 158 }
 159
 160 void wiphy_sysfs_exit(void)
 161 {
 162         class_unregister(&ieee80211_class);
 163 }