[linux.git] / net / mac80211 / ieee80211_iface.c

/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright (c) 2006 Jiri Benc <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/kernel.h>
#include <linux/if_arp.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "sta_info.h"
#include "debugfs_netdev.h"

void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata)
{
	int i;

	/* Default values for sub-interface parameters */
	sdata->drop_unencrypted = 0;
	sdata->eapol = 1;
	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
		skb_queue_head_init(&sdata->fragments[i].skb_list);
}

static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata)
{
	int i;

	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
		__skb_queue_purge(&sdata->fragments[i].skb_list);
	}
}

/* Must be called with rtnl lock held. */
int ieee80211_if_add(struct net_device *dev, const char *name,
		     struct net_device **new_dev, int type)
{
	struct net_device *ndev;
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct ieee80211_sub_if_data *sdata = NULL;
	int ret;

	ASSERT_RTNL();
	ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
			    name, ieee80211_if_setup);
	if (!ndev)
		return -ENOMEM;

	ret = dev_alloc_name(ndev, ndev->name);
	if (ret < 0)
		goto fail;

	memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
	ndev->base_addr = dev->base_addr;
	ndev->irq = dev->irq;
	ndev->mem_start = dev->mem_start;
	ndev->mem_end = dev->mem_end;
	SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));

	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
	ndev->ieee80211_ptr = &sdata->wdev;
	sdata->wdev.wiphy = local->hw.wiphy;
	sdata->type = IEEE80211_IF_TYPE_AP;
	sdata->dev = ndev;
	sdata->local = local;
	ieee80211_if_sdata_init(sdata);

	ret = register_netdevice(ndev);
	if (ret)
		goto fail;

	ieee80211_debugfs_add_netdev(sdata);
	ieee80211_if_set_type(ndev, type);

	write_lock_bh(&local->sub_if_lock);
	if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) {
		write_unlock_bh(&local->sub_if_lock);
		__ieee80211_if_del(local, sdata);
		return -ENODEV;
	}
	list_add(&sdata->list, &local->sub_if_list);
	if (new_dev)
		*new_dev = ndev;
	write_unlock_bh(&local->sub_if_lock);

	ieee80211_update_default_wep_only(local);

	return 0;

fail:
	free_netdev(ndev);
	return ret;
}

int ieee80211_if_add_mgmt(struct ieee80211_local *local)
{
	struct net_device *ndev;
	struct ieee80211_sub_if_data *nsdata;
	int ret;

	ASSERT_RTNL();

	ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d",
			    ieee80211_if_mgmt_setup);
	if (!ndev)
		return -ENOMEM;
	ret = dev_alloc_name(ndev, ndev->name);
	if (ret < 0)
		goto fail;

	memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
	SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));

	nsdata = IEEE80211_DEV_TO_SUB_IF(ndev);
	ndev->ieee80211_ptr = &nsdata->wdev;
	nsdata->wdev.wiphy = local->hw.wiphy;
	nsdata->type = IEEE80211_IF_TYPE_MGMT;
	nsdata->dev = ndev;
	nsdata->local = local;
	ieee80211_if_sdata_init(nsdata);

	ret = register_netdevice(ndev);
	if (ret)
		goto fail;

	ieee80211_debugfs_add_netdev(nsdata);

	if (local->open_count > 0)
		dev_open(ndev);
	local->apdev = ndev;
	return 0;

fail:
	free_netdev(ndev);
	return ret;
}

void ieee80211_if_del_mgmt(struct ieee80211_local *local)
{
	struct net_device *apdev;

	ASSERT_RTNL();
	apdev = local->apdev;
	ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev));
	local->apdev = NULL;
	unregister_netdevice(apdev);
}

void ieee80211_if_set_type(struct net_device *dev, int type)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	int oldtype = sdata->type;

	dev->hard_start_xmit = ieee80211_subif_start_xmit;

	sdata->type = type;
	switch (type) {
	case IEEE80211_IF_TYPE_WDS:
		sdata->bss = NULL;
		break;
	case IEEE80211_IF_TYPE_VLAN:
		break;
	case IEEE80211_IF_TYPE_AP:
		sdata->u.ap.dtim_period = 2;
		sdata->u.ap.force_unicast_rateidx = -1;
		sdata->u.ap.max_ratectrl_rateidx = -1;
		skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
		sdata->bss = &sdata->u.ap;
		break;
	case IEEE80211_IF_TYPE_STA:
	case IEEE80211_IF_TYPE_IBSS: {
		struct ieee80211_sub_if_data *msdata;
		struct ieee80211_if_sta *ifsta;

		ifsta = &sdata->u.sta;
		INIT_WORK(&ifsta->work, ieee80211_sta_work);
		setup_timer(&ifsta->timer, ieee80211_sta_timer,
			    (unsigned long) sdata);
		skb_queue_head_init(&ifsta->skb_queue);

		ifsta->capab = WLAN_CAPABILITY_ESS;
		ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
			IEEE80211_AUTH_ALG_SHARED_KEY;
		ifsta->create_ibss = 1;
		ifsta->wmm_enabled = 1;
		ifsta->auto_channel_sel = 1;
		ifsta->auto_bssid_sel = 1;

		msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev);
		sdata->bss = &msdata->u.ap;
		break;
	}
	case IEEE80211_IF_TYPE_MNTR:
		dev->type = ARPHRD_IEEE80211_RADIOTAP;
		dev->hard_start_xmit = ieee80211_monitor_start_xmit;
		break;
	default:
		printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
		       dev->name, __FUNCTION__, type);
	}
	ieee80211_debugfs_change_if_type(sdata, oldtype);
	ieee80211_update_default_wep_only(local);
}

/* Must be called with rtnl lock held. */
void ieee80211_if_reinit(struct net_device *dev)
{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct sta_info *sta;
	int i;

	ASSERT_RTNL();
	ieee80211_if_sdata_deinit(sdata);
	for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
		if (!sdata->keys[i])
			continue;
#if 0
		/* The interface is down at the moment, so there is not
		 * really much point in disabling the keys at this point. */
		memset(addr, 0xff, ETH_ALEN);
		if (local->ops->set_key)
			local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr,
					    local->keys[i], 0);
#endif
		ieee80211_key_free(sdata->keys[i]);
		sdata->keys[i] = NULL;
	}

	switch (sdata->type) {
	case IEEE80211_IF_TYPE_AP: {
		/* Remove all virtual interfaces that use this BSS
		 * as their sdata->bss */
		struct ieee80211_sub_if_data *tsdata, *n;
		LIST_HEAD(tmp_list);

		write_lock_bh(&local->sub_if_lock);
		list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) {
			if (tsdata != sdata && tsdata->bss == &sdata->u.ap) {
				printk(KERN_DEBUG "%s: removing virtual "
				       "interface %s because its BSS interface"
				       " is being removed\n",
				       sdata->dev->name, tsdata->dev->name);
				list_move_tail(&tsdata->list, &tmp_list);
			}
		}
		write_unlock_bh(&local->sub_if_lock);

		list_for_each_entry_safe(tsdata, n, &tmp_list, list)
			__ieee80211_if_del(local, tsdata);

		kfree(sdata->u.ap.beacon_head);
		kfree(sdata->u.ap.beacon_tail);
		kfree(sdata->u.ap.generic_elem);

		if (dev != local->mdev) {
			struct sk_buff *skb;
			while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
				local->total_ps_buffered--;
				dev_kfree_skb(skb);
			}
		}

		break;
	}
	case IEEE80211_IF_TYPE_WDS:
		sta = sta_info_get(local, sdata->u.wds.remote_addr);
		if (sta) {
			sta_info_free(sta);
			sta_info_put(sta);
		} else {
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
			printk(KERN_DEBUG "%s: Someone had deleted my STA "
			       "entry for the WDS link\n", dev->name);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
		}
		break;
	case IEEE80211_IF_TYPE_STA:
	case IEEE80211_IF_TYPE_IBSS:
		kfree(sdata->u.sta.extra_ie);
		sdata->u.sta.extra_ie = NULL;
		kfree(sdata->u.sta.assocreq_ies);
		sdata->u.sta.assocreq_ies = NULL;
		kfree(sdata->u.sta.assocresp_ies);
		sdata->u.sta.assocresp_ies = NULL;
		if (sdata->u.sta.probe_resp) {
			dev_kfree_skb(sdata->u.sta.probe_resp);
			sdata->u.sta.probe_resp = NULL;
		}

		break;
	case IEEE80211_IF_TYPE_MNTR:
		dev->type = ARPHRD_ETHER;
		break;
	}

	/* remove all STAs that are bound to this virtual interface */
	sta_info_flush(local, dev);

	memset(&sdata->u, 0, sizeof(sdata->u));
	ieee80211_if_sdata_init(sdata);
}

/* Must be called with rtnl lock held. */
void __ieee80211_if_del(struct ieee80211_local *local,
			struct ieee80211_sub_if_data *sdata)
{
	struct net_device *dev = sdata->dev;

	ieee80211_debugfs_remove_netdev(sdata);
	unregister_netdevice(dev);
	/* Except master interface, the net_device will be freed by
	 * net_device->destructor (i. e. ieee80211_if_free). */
}

/* Must be called with rtnl lock held. */
int ieee80211_if_remove(struct net_device *dev, const char *name, int id)
{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct ieee80211_sub_if_data *sdata, *n;

	ASSERT_RTNL();

	write_lock_bh(&local->sub_if_lock);
	list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) {
		if ((sdata->type == id || id == -1) &&
		    strcmp(name, sdata->dev->name) == 0 &&
		    sdata->dev != local->mdev) {
			list_del(&sdata->list);
			write_unlock_bh(&local->sub_if_lock);
			__ieee80211_if_del(local, sdata);
			ieee80211_update_default_wep_only(local);
			return 0;
		}
	}
	write_unlock_bh(&local->sub_if_lock);
	return -ENODEV;
}

void ieee80211_if_free(struct net_device *dev)
{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	/* local->apdev must be NULL when freeing management interface */
	BUG_ON(dev == local->apdev);
	ieee80211_if_sdata_deinit(sdata);
	free_netdev(dev);
}
Commit	Line	Data
f0706e82 JB	1	/*
	2	* Copyright 2002-2005, Instant802 Networks, Inc.
	3	* Copyright 2005-2006, Devicescape Software, Inc.
	4	* Copyright (c) 2006 Jiri Benc <[email protected]>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10	#include <linux/kernel.h>
	11	#include <linux/if_arp.h>
	12	#include <linux/netdevice.h>
	13	#include <linux/rtnetlink.h>
	14	#include <net/mac80211.h>
	15	#include "ieee80211_i.h"
	16	#include "sta_info.h"
e9f207f0	17	#include "debugfs_netdev.h"
f0706e82 JB	18
	19	void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata)
	20	{
	21	int i;
	22
	23	/* Default values for sub-interface parameters */
	24	sdata->drop_unencrypted = 0;
	25	sdata->eapol = 1;
	26	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
	27	skb_queue_head_init(&sdata->fragments[i].skb_list);
	28	}
	29
	30	static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata)
	31	{
	32	int i;
	33
	34	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
	35	__skb_queue_purge(&sdata->fragments[i].skb_list);
	36	}
	37	}
	38
	39	/* Must be called with rtnl lock held. */
	40	int ieee80211_if_add(struct net_device dev, const char name,
	41	struct net_device **new_dev, int type)
	42	{
	43	struct net_device *ndev;
	44	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	45	struct ieee80211_sub_if_data *sdata = NULL;
	46	int ret;
	47
	48	ASSERT_RTNL();
	49	ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
	50	name, ieee80211_if_setup);
	51	if (!ndev)
	52	return -ENOMEM;
	53
	54	ret = dev_alloc_name(ndev, ndev->name);
	55	if (ret < 0)
	56	goto fail;
	57
	58	memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
	59	ndev->base_addr = dev->base_addr;
	60	ndev->irq = dev->irq;
	61	ndev->mem_start = dev->mem_start;
	62	ndev->mem_end = dev->mem_end;
	63	SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
	64
	65	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
	66	ndev->ieee80211_ptr = &sdata->wdev;
	67	sdata->wdev.wiphy = local->hw.wiphy;
	68	sdata->type = IEEE80211_IF_TYPE_AP;
	69	sdata->dev = ndev;
	70	sdata->local = local;
	71	ieee80211_if_sdata_init(sdata);
	72
	73	ret = register_netdevice(ndev);
	74	if (ret)
	75	goto fail;
	76
e9f207f0	77	ieee80211_debugfs_add_netdev(sdata);
f0706e82 JB	78	ieee80211_if_set_type(ndev, type);
	79
	80	write_lock_bh(&local->sub_if_lock);
	81	if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) {
	82	write_unlock_bh(&local->sub_if_lock);
	83	__ieee80211_if_del(local, sdata);
	84	return -ENODEV;
	85	}
	86	list_add(&sdata->list, &local->sub_if_list);
	87	if (new_dev)
	88	*new_dev = ndev;
	89	write_unlock_bh(&local->sub_if_lock);
	90
	91	ieee80211_update_default_wep_only(local);
	92
	93	return 0;
	94
	95	fail:
	96	free_netdev(ndev);
	97	return ret;
	98	}
	99
	100	int ieee80211_if_add_mgmt(struct ieee80211_local *local)
	101	{
	102	struct net_device *ndev;
	103	struct ieee80211_sub_if_data *nsdata;
	104	int ret;
	105
	106	ASSERT_RTNL();
	107
	108	ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d",
	109	ieee80211_if_mgmt_setup);
	110	if (!ndev)
	111	return -ENOMEM;
	112	ret = dev_alloc_name(ndev, ndev->name);
	113	if (ret < 0)
	114	goto fail;
	115
	116	memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
	117	SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
	118
	119	nsdata = IEEE80211_DEV_TO_SUB_IF(ndev);
	120	ndev->ieee80211_ptr = &nsdata->wdev;
	121	nsdata->wdev.wiphy = local->hw.wiphy;
	122	nsdata->type = IEEE80211_IF_TYPE_MGMT;
	123	nsdata->dev = ndev;
	124	nsdata->local = local;
	125	ieee80211_if_sdata_init(nsdata);
	126
	127	ret = register_netdevice(ndev);
	128	if (ret)
	129	goto fail;
	130
e9f207f0 JB	131	ieee80211_debugfs_add_netdev(nsdata);
e9f207f0 JB	132
f0706e82 JB	133	if (local->open_count > 0)
	134	dev_open(ndev);
	135	local->apdev = ndev;
	136	return 0;
	137
	138	fail:
	139	free_netdev(ndev);
	140	return ret;
	141	}
	142
	143	void ieee80211_if_del_mgmt(struct ieee80211_local *local)
	144	{
	145	struct net_device *apdev;
	146
	147	ASSERT_RTNL();
	148	apdev = local->apdev;
e9f207f0	149	ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev));
f0706e82 JB	150	local->apdev = NULL;
	151	unregister_netdevice(apdev);
	152	}
	153
	154	void ieee80211_if_set_type(struct net_device *dev, int type)
	155	{
	156	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	157	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
e9f207f0	158	int oldtype = sdata->type;
f0706e82	159
40f7cac9 JB	160	dev->hard_start_xmit = ieee80211_subif_start_xmit;
40f7cac9 JB	161
f0706e82 JB	162	sdata->type = type;
	163	switch (type) {
	164	case IEEE80211_IF_TYPE_WDS:
	165	sdata->bss = NULL;
	166	break;
	167	case IEEE80211_IF_TYPE_VLAN:
	168	break;
	169	case IEEE80211_IF_TYPE_AP:
	170	sdata->u.ap.dtim_period = 2;
	171	sdata->u.ap.force_unicast_rateidx = -1;
	172	sdata->u.ap.max_ratectrl_rateidx = -1;
	173	skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
	174	sdata->bss = &sdata->u.ap;
	175	break;
	176	case IEEE80211_IF_TYPE_STA:
	177	case IEEE80211_IF_TYPE_IBSS: {
	178	struct ieee80211_sub_if_data *msdata;
	179	struct ieee80211_if_sta *ifsta;
	180
	181	ifsta = &sdata->u.sta;
	182	INIT_WORK(&ifsta->work, ieee80211_sta_work);
	183	setup_timer(&ifsta->timer, ieee80211_sta_timer,
	184	(unsigned long) sdata);
	185	skb_queue_head_init(&ifsta->skb_queue);
	186
	187	ifsta->capab = WLAN_CAPABILITY_ESS;
	188	ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN \|
	189	IEEE80211_AUTH_ALG_SHARED_KEY;
	190	ifsta->create_ibss = 1;
	191	ifsta->wmm_enabled = 1;
	192	ifsta->auto_channel_sel = 1;
	193	ifsta->auto_bssid_sel = 1;
	194
	195	msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev);
	196	sdata->bss = &msdata->u.ap;
	197	break;
	198	}
	199	case IEEE80211_IF_TYPE_MNTR:
	200	dev->type = ARPHRD_IEEE80211_RADIOTAP;
40f7cac9	201	dev->hard_start_xmit = ieee80211_monitor_start_xmit;
f0706e82 JB	202	break;
	203	default:
	204	printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
	205	dev->name, __FUNCTION__, type);
	206	}
e9f207f0	207	ieee80211_debugfs_change_if_type(sdata, oldtype);
f0706e82 JB	208	ieee80211_update_default_wep_only(local);
	209	}
	210
	211	/* Must be called with rtnl lock held. */
	212	void ieee80211_if_reinit(struct net_device *dev)
	213	{
	214	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	215	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	216	struct sta_info *sta;
	217	int i;
	218
	219	ASSERT_RTNL();
	220	ieee80211_if_sdata_deinit(sdata);
	221	for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
	222	if (!sdata->keys[i])
	223	continue;
	224	#if 0
	225	/* The interface is down at the moment, so there is not
	226	* really much point in disabling the keys at this point. */
	227	memset(addr, 0xff, ETH_ALEN);
	228	if (local->ops->set_key)
	229	local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr,
	230	local->keys[i], 0);
	231	#endif
	232	ieee80211_key_free(sdata->keys[i]);
	233	sdata->keys[i] = NULL;
	234	}
	235
	236	switch (sdata->type) {
	237	case IEEE80211_IF_TYPE_AP: {
	238	/* Remove all virtual interfaces that use this BSS
	239	* as their sdata->bss */
	240	struct ieee80211_sub_if_data tsdata, n;
	241	LIST_HEAD(tmp_list);
	242
	243	write_lock_bh(&local->sub_if_lock);
	244	list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) {
	245	if (tsdata != sdata && tsdata->bss == &sdata->u.ap) {
	246	printk(KERN_DEBUG "%s: removing virtual "
	247	"interface %s because its BSS interface"
	248	" is being removed\n",
	249	sdata->dev->name, tsdata->dev->name);
	250	list_move_tail(&tsdata->list, &tmp_list);
	251	}
	252	}
	253	write_unlock_bh(&local->sub_if_lock);
	254
	255	list_for_each_entry_safe(tsdata, n, &tmp_list, list)
	256	__ieee80211_if_del(local, tsdata);
	257
	258	kfree(sdata->u.ap.beacon_head);
	259	kfree(sdata->u.ap.beacon_tail);
	260	kfree(sdata->u.ap.generic_elem);
	261
	262	if (dev != local->mdev) {
	263	struct sk_buff *skb;
	264	while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
	265	local->total_ps_buffered--;
	266	dev_kfree_skb(skb);
	267	}
	268	}
	269
	270	break;
	271	}
272	case IEEE80211_IF_TYPE_WDS:
273	sta = sta_info_get(local, sdata->u.wds.remote_addr);
274	if (sta) {
be8755e1	275	sta_info_free(sta);
f0706e82	276	sta_info_put(sta);
f0706e82 JB	277	} else {
	278	#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
	279	printk(KERN_DEBUG "%s: Someone had deleted my STA "
	280	"entry for the WDS link\n", dev->name);
	281	#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
	282	}
	283	break;
	284	case IEEE80211_IF_TYPE_STA:
	285	case IEEE80211_IF_TYPE_IBSS:
	286	kfree(sdata->u.sta.extra_ie);
	287	sdata->u.sta.extra_ie = NULL;
	288	kfree(sdata->u.sta.assocreq_ies);
	289	sdata->u.sta.assocreq_ies = NULL;
	290	kfree(sdata->u.sta.assocresp_ies);
	291	sdata->u.sta.assocresp_ies = NULL;
	292	if (sdata->u.sta.probe_resp) {
	293	dev_kfree_skb(sdata->u.sta.probe_resp);
	294	sdata->u.sta.probe_resp = NULL;
	295	}
	296
	297	break;
	298	case IEEE80211_IF_TYPE_MNTR:
	299	dev->type = ARPHRD_ETHER;
	300	break;
	301	}
	302
	303	/* remove all STAs that are bound to this virtual interface */
	304	sta_info_flush(local, dev);
	305
	306	memset(&sdata->u, 0, sizeof(sdata->u));
	307	ieee80211_if_sdata_init(sdata);
	308	}
	309
	310	/* Must be called with rtnl lock held. */
	311	void __ieee80211_if_del(struct ieee80211_local *local,
	312	struct ieee80211_sub_if_data *sdata)
	313	{
	314	struct net_device *dev = sdata->dev;
	315
e9f207f0	316	ieee80211_debugfs_remove_netdev(sdata);
f0706e82 JB	317	unregister_netdevice(dev);
	318	/* Except master interface, the net_device will be freed by
	319	* net_device->destructor (i. e. ieee80211_if_free). */
	320	}
	321
	322	/* Must be called with rtnl lock held. */
	323	int ieee80211_if_remove(struct net_device dev, const char name, int id)
	324	{
	325	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	326	struct ieee80211_sub_if_data sdata, n;
	327
	328	ASSERT_RTNL();
	329
	330	write_lock_bh(&local->sub_if_lock);
	331	list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) {
	332	if ((sdata->type == id \|\| id == -1) &&
	333	strcmp(name, sdata->dev->name) == 0 &&
	334	sdata->dev != local->mdev) {
	335	list_del(&sdata->list);
	336	write_unlock_bh(&local->sub_if_lock);
	337	__ieee80211_if_del(local, sdata);
	338	ieee80211_update_default_wep_only(local);
	339	return 0;
	340	}
	341	}
	342	write_unlock_bh(&local->sub_if_lock);
	343	return -ENODEV;
	344	}
	345
	346	void ieee80211_if_free(struct net_device *dev)
	347	{
	348	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	349	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	350
	351	/* local->apdev must be NULL when freeing management interface */
	352	BUG_ON(dev == local->apdev);
	353	ieee80211_if_sdata_deinit(sdata);
	354	free_netdev(dev);
	355	}