path: root/net/wireless/scan.c

/*
 * cfg80211 scan result handling
 *
 * Copyright 2008 Johannes Berg <johannes@sipsolutions.net>
 */
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <linux/nl80211.h>
#include <linux/etherdevice.h>
#include <net/arp.h>
#include <net/cfg80211.h>
#include <net/cfg80211-wext.h>
#include <net/iw_handler.h>
#include "core.h"
#include "nl80211.h"
#include "wext-compat.h"
#include "rdev-ops.h"

#define IEEE80211_SCAN_RESULT_EXPIRE	(30 * HZ)

static void bss_release(struct kref *ref)
{
	struct cfg80211_bss_ies *ies;
	struct cfg80211_internal_bss *bss;

	bss = container_of(ref, struct cfg80211_internal_bss, ref);

	if (WARN_ON(atomic_read(&bss->hold)))
		return;

	if (bss->pub.free_priv)
		bss->pub.free_priv(&bss->pub);

	ies = (void *)rcu_access_pointer(bss->pub.beacon_ies);
	if (ies)
		kfree_rcu(ies, rcu_head);
	ies = (void *)rcu_access_pointer(bss->pub.proberesp_ies);
	if (ies)
		kfree_rcu(ies, rcu_head);

	kfree(bss);
}

/* must hold dev->bss_lock! */
static void __cfg80211_unlink_bss(struct cfg80211_registered_device *dev,
				  struct cfg80211_internal_bss *bss)
{
	list_del_init(&bss->list);