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 static DEVICE_ATTR_RO(name)
  35
  36 SHOW_FMT(index, "%d", wiphy_idx);
  37 SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
  38 SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
  39
  40 static ssize_t name_show(struct device *dev,
  41                          struct device_attribute *attr,
  42                          char *buf) {
  43         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  44         return sprintf(buf, "%s\n", dev_name(&wiphy->dev));
  45 }
  46 static DEVICE_ATTR_RO(name);
  47
  48 static ssize_t addresses_show(struct device *dev,
  49                               struct device_attribute *attr,
  50                               char *buf)
  51 {
  52         struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  53         char *start = buf;
  54         int i;
  55
  56         if (!wiphy->addresses)
  57                 return sprintf(buf, "%pM\n", wiphy->perm_addr);
  58
  59         for (i = 0; i < wiphy->n_addresses; i++)
  60                 buf += sprintf(buf, "%pM\n", &wiphy->addresses[i].addr);
  61
  62         return buf - start;
  63 }
  64 static DEVICE_ATTR_RO(addresses);
  65
  66 static struct attribute *ieee80211_attrs[] = {
  67         &dev_attr_index.attr,
  68         &dev_attr_macaddress.attr,
  69         &dev_attr_address_mask.attr,
  70         &dev_attr_addresses.attr,
  71         &dev_attr_name.attr,
  72         NULL,
  73 };
  74 ATTRIBUTE_GROUPS(ieee80211);
  75
  76 static void wiphy_dev_release(struct device *dev)
  77 {
  78         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  79
  80         cfg80211_dev_free(rdev);
  81 }
  82
  83 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
  84 {
  85         /* TODO, we probably need stuff here */
  86         return 0;
  87 }
  88
  89 #ifdef CONFIG_PM
  90 static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
  91 {
  92         struct wireless_dev *wdev;
  93
  94         list_for_each_entry(wdev, &rdev->wdev_list, list)
  95                 cfg80211_leave(rdev, wdev);
  96 }
  97
  98 static int wiphy_suspend(struct device *dev, pm_message_t state)
  99 {
 100         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
 101         int ret = 0;
 102
 103         rdev->suspend_at = get_seconds();
 104
 105         rtnl_lock();
 106         if (rdev->wiphy.registered) {
 107                 if (!rdev->wiphy.wowlan_config)
 108                         cfg80211_leave_all(rdev);
 109                 if (rdev->ops->suspend)
 110                         ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
 111                 if (ret == 1) {
 112                         /* Driver refuse to configure wowlan */
 113                         cfg80211_leave_all(rdev);
 114                         ret = rdev_suspend(rdev, NULL);
 115                 }
 116         }
 117         rtnl_unlock();
 118
 119         return ret;
 120 }
 121
 122 static int wiphy_resume(struct device *dev)
 123 {
 124         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
 125         int ret = 0;
 126
 127         /* Age scan results with time spent in suspend */
 128         cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
 129
 130         if (rdev->ops->resume) {
 131                 rtnl_lock();
 132                 if (rdev->wiphy.registered)
 133                         ret = rdev_resume(rdev);
 134                 rtnl_unlock();
 135         }
 136
 137         return ret;
 138 }
 139 #endif
 140
 141 static const void *wiphy_namespace(struct device *d)
 142 {
 143         struct wiphy *wiphy = container_of(d, struct wiphy, dev);
 144
 145         return wiphy_net(wiphy);
 146 }
 147
 148 struct class ieee80211_class = {
 149         .name = "ieee80211",
 150         .owner = THIS_MODULE,
 151         .dev_release = wiphy_dev_release,
 152         .dev_groups = ieee80211_groups,
 153         .dev_uevent = wiphy_uevent,
 154 #ifdef CONFIG_PM
 155         .suspend = wiphy_suspend,
 156         .resume = wiphy_resume,
 157 #endif
 158         .ns_type = &net_ns_type_operations,
 159         .namespace = wiphy_namespace,
 160 };
 161
 162 int wiphy_sysfs_init(void)
 163 {
 164         return class_register(&ieee80211_class);
 165 }
 166
 167 void wiphy_sysfs_exit(void)
 168 {
 169         class_unregister(&ieee80211_class);
 170 }