LXR linux/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
  21static 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)                                     \
  28static 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}                                                                       \
  34static DEVICE_ATTR_RO(name)
  35
  36SHOW_FMT(index, "%d", wiphy_idx);
  37SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
  38SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
  39
  40static ssize_t name_show(struct device *dev,
  41                         struct device_attribute *attr,
  42                         char *buf)
  43{
  44        struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  45
  46        return sprintf(buf, "%s\n", wiphy_name(wiphy));
  47}
  48static DEVICE_ATTR_RO(name);
  49
  50static ssize_t addresses_show(struct device *dev,
  51                              struct device_attribute *attr,
  52                              char *buf)
  53{
  54        struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
  55        char *start = buf;
  56        int i;
  57
  58        if (!wiphy->addresses)
  59                return sprintf(buf, "%pM\n", wiphy->perm_addr);
  60
  61        for (i = 0; i < wiphy->n_addresses; i++)
  62                buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);
  63
  64        return buf - start;
  65}
  66static DEVICE_ATTR_RO(addresses);
  67
  68static struct attribute *ieee80211_attrs[] = {
  69        &dev_attr_index.attr,
  70        &dev_attr_macaddress.attr,
  71        &dev_attr_address_mask.attr,
  72        &dev_attr_addresses.attr,
  73        &dev_attr_name.attr,
  74        NULL,
  75};
  76ATTRIBUTE_GROUPS(ieee80211);
  77
  78static void wiphy_dev_release(struct device *dev)
  79{
  80        struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
  81
  82        cfg80211_dev_free(rdev);
  83}
  84
  85static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
  86{
  87        /* TODO, we probably need stuff here */
  88        return 0;
  89}
  90
  91#ifdef CONFIG_PM_SLEEP
  92static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
  93{
  94        struct wireless_dev *wdev;
  95
  96        list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
  97                cfg80211_leave(rdev, wdev);
  98}
  99
 100static int wiphy_suspend(struct device *dev)
 101{
 102        struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
 103        int ret = 0;
 104
 105        rdev->suspend_at = get_seconds();
 106
 107        rtnl_lock();
 108        if (rdev->wiphy.registered) {
 109                if (!rdev->wiphy.wowlan_config) {
 110                        cfg80211_leave_all(rdev);
 111                        cfg80211_process_rdev_events(rdev);
 112                }
 113                if (rdev->ops->suspend)
 114                        ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
 115                if (ret == 1) {
 116                        /* Driver refuse to configure wowlan */
 117                        cfg80211_leave_all(rdev);
 118                        cfg80211_process_rdev_events(rdev);
 119                        ret = rdev_suspend(rdev, NULL);
 120                }
 121        }
 122        rtnl_unlock();
 123
 124        return ret;
 125}
 126
 127static int wiphy_resume(struct device *dev)
 128{
 129        struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
 130        int ret = 0;
 131
 132        /* Age scan results with time spent in suspend */
 133        cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
 134
 135        rtnl_lock();
 136        if (rdev->wiphy.registered && rdev->ops->resume)
 137                ret = rdev_resume(rdev);
 138        rtnl_unlock();
 139
 140        return ret;
 141}
 142
 143static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
 144#define WIPHY_PM_OPS (&wiphy_pm_ops)
 145#else
 146#define WIPHY_PM_OPS NULL
 147#endif
 148
 149static const void *wiphy_namespace(struct device *d)
 150{
 151        struct wiphy *wiphy = container_of(d, struct wiphy, dev);
 152
 153        return wiphy_net(wiphy);
 154}
 155
 156struct class ieee80211_class = {
 157        .name = "ieee80211",
 158        .owner = THIS_MODULE,
 159        .dev_release = wiphy_dev_release,
 160        .dev_groups = ieee80211_groups,
 161        .dev_uevent = wiphy_uevent,
 162        .pm = WIPHY_PM_OPS,
 163        .ns_type = &net_ns_type_operations,
 164        .namespace = wiphy_namespace,
 165};
 166
 167int wiphy_sysfs_init(void)
 168{
 169        return class_register(&ieee80211_class);
 170}
 171
 172void wiphy_sysfs_exit(void)
 173{
 174        class_unregister(&ieee80211_class);
 175}
 176