package/mac80211/src/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 static ssize_t _show_index(struct device *dev, struct device_attribute *attr,
  27                            char *buf)
  28 {
  29         return sprintf(buf, "%d\n", dev_to_rdev(dev)->idx);
  30 }
  31
  32 static ssize_t _show_permaddr(struct device *dev,
  33                               struct device_attribute *attr,
  34                               char *buf)
  35 {
  36         unsigned char *addr = dev_to_rdev(dev)->wiphy.perm_addr;
  37
  38         return sprintf(buf, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
  39                        addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
  40 }
  41
  42 static ssize_t _store_add_iface(struct device *dev,
  43                                 struct device_attribute *attr,
  44                                 const char *buf, size_t len)
  45 {
  46         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  47         int res;
  48
  49         if (len > IFNAMSIZ)
  50                 return -EINVAL;
  51
  52         if (!rdev->ops->add_virtual_intf)
  53                 return -ENOSYS;
  54
  55         rtnl_lock();
  56         res = rdev->ops->add_virtual_intf(&rdev->wiphy, (char*)buf,
  57                                           NL80211_IFTYPE_UNSPECIFIED);
  58         rtnl_unlock();
  59
  60         return res ? res : len;
  61 }
  62
  63 static ssize_t _store_remove_iface(struct device *dev,
  64                                    struct device_attribute *attr,
  65                                    const char *buf, size_t len)
  66 {
  67         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  68         int res, ifidx;
  69         struct net_device *netdev;
  70
  71         if (len > IFNAMSIZ)
  72                 return -EINVAL;
  73
  74         if (!rdev->ops->del_virtual_intf)
  75                 return -ENOSYS;
  76
  77         netdev = dev_get_by_name(buf);
  78         if (!netdev)
  79                 return -ENODEV;
  80         ifidx = netdev->ifindex;
  81         dev_put(netdev);
  82
  83         rtnl_lock();
  84         res = rdev->ops->del_virtual_intf(&rdev->wiphy, ifidx);
  85         rtnl_unlock();
  86
  87         return res ? res : len;
  88 }
  89
  90 static struct device_attribute ieee80211_dev_attrs[] = {
  91         __ATTR(index, S_IRUGO, _show_index, NULL),
  92         __ATTR(macaddress, S_IRUGO, _show_permaddr, NULL),
  93         __ATTR(add_iface, S_IWUGO, NULL, _store_add_iface),
  94         __ATTR(remove_iface, S_IWUGO, NULL, _store_remove_iface),
  95         {}
  96 };
  97
  98 static void wiphy_dev_release(struct device *dev)
  99 {
 100         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
 101
 102         cfg80211_dev_free(rdev);
 103 }
 104
 105 static int wiphy_uevent(struct device *dev, char **envp,
 106                         int num_envp, char *buf, int size)
 107 {
 108         /* TODO, we probably need stuff here */
 109         return 0;
 110 }
 111
 112 struct class ieee80211_class = {
 113         .name = "ieee80211",
 114         .owner = THIS_MODULE,
 115         .dev_release = wiphy_dev_release,
 116         .dev_attrs = ieee80211_dev_attrs,
 117 #ifdef CONFIG_HOTPLUG
 118         .dev_uevent = wiphy_uevent,
 119 #endif
 120 };
 121
 122 int wiphy_sysfs_init(void)
 123 {
 124         return class_register(&ieee80211_class);
 125 }
 126
 127 void wiphy_sysfs_exit(void)
 128 {
 129         class_unregister(&ieee80211_class);
 130 }