[mirror_ubuntu-focal-kernel.git] / net / mac80211 / ieee80211_iface.c

/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
 *
 * 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);

	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);
	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->flags |= IEEE80211_STA_CREATE_IBSS |
			IEEE80211_STA_WMM_ENABLED |
			IEEE80211_STA_AUTO_BSSID_SEL |
			IEEE80211_STA_AUTO_CHANNEL_SEL;

		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);
}

/* 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],
					    local->default_wep_only);
#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);
			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 <jbenc@suse.cz>
	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
f0706e82 JB	91	return 0;
	92
	93	fail:
	94	free_netdev(ndev);
	95	return ret;
	96	}
	97
	98	int ieee80211_if_add_mgmt(struct ieee80211_local *local)
	99	{
	100	struct net_device *ndev;
	101	struct ieee80211_sub_if_data *nsdata;
	102	int ret;
	103
	104	ASSERT_RTNL();
	105
	106	ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d",
	107	ieee80211_if_mgmt_setup);
	108	if (!ndev)
	109	return -ENOMEM;
	110	ret = dev_alloc_name(ndev, ndev->name);
	111	if (ret < 0)
	112	goto fail;
	113
	114	memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
	115	SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
	116
	117	nsdata = IEEE80211_DEV_TO_SUB_IF(ndev);
	118	ndev->ieee80211_ptr = &nsdata->wdev;
	119	nsdata->wdev.wiphy = local->hw.wiphy;
	120	nsdata->type = IEEE80211_IF_TYPE_MGMT;
	121	nsdata->dev = ndev;
	122	nsdata->local = local;
	123	ieee80211_if_sdata_init(nsdata);
	124
	125	ret = register_netdevice(ndev);
	126	if (ret)
	127	goto fail;
	128
e9f207f0 JB	129	ieee80211_debugfs_add_netdev(nsdata);
e9f207f0 JB	130
f0706e82 JB	131	if (local->open_count > 0)
	132	dev_open(ndev);
	133	local->apdev = ndev;
	134	return 0;
	135
	136	fail:
	137	free_netdev(ndev);
	138	return ret;
	139	}
	140
	141	void ieee80211_if_del_mgmt(struct ieee80211_local *local)
	142	{
	143	struct net_device *apdev;
	144
	145	ASSERT_RTNL();
	146	apdev = local->apdev;
e9f207f0	147	ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev));
f0706e82 JB	148	local->apdev = NULL;
	149	unregister_netdevice(apdev);
	150	}
	151
	152	void ieee80211_if_set_type(struct net_device *dev, int type)
	153	{
	154	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
e9f207f0	155	int oldtype = sdata->type;
f0706e82	156
40f7cac9 JB	157	dev->hard_start_xmit = ieee80211_subif_start_xmit;
40f7cac9 JB	158
f0706e82 JB	159	sdata->type = type;
	160	switch (type) {
	161	case IEEE80211_IF_TYPE_WDS:
	162	sdata->bss = NULL;
	163	break;
	164	case IEEE80211_IF_TYPE_VLAN:
	165	break;
	166	case IEEE80211_IF_TYPE_AP:
	167	sdata->u.ap.dtim_period = 2;
	168	sdata->u.ap.force_unicast_rateidx = -1;
	169	sdata->u.ap.max_ratectrl_rateidx = -1;
	170	skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
	171	sdata->bss = &sdata->u.ap;
	172	break;
	173	case IEEE80211_IF_TYPE_STA:
	174	case IEEE80211_IF_TYPE_IBSS: {
	175	struct ieee80211_sub_if_data *msdata;
	176	struct ieee80211_if_sta *ifsta;
	177
	178	ifsta = &sdata->u.sta;
	179	INIT_WORK(&ifsta->work, ieee80211_sta_work);
	180	setup_timer(&ifsta->timer, ieee80211_sta_timer,
	181	(unsigned long) sdata);
	182	skb_queue_head_init(&ifsta->skb_queue);
	183
	184	ifsta->capab = WLAN_CAPABILITY_ESS;
	185	ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN \|
	186	IEEE80211_AUTH_ALG_SHARED_KEY;
d6f2da5b JS	187	ifsta->flags \|= IEEE80211_STA_CREATE_IBSS \|
	188	IEEE80211_STA_WMM_ENABLED \|
	189	IEEE80211_STA_AUTO_BSSID_SEL \|
	190	IEEE80211_STA_AUTO_CHANNEL_SEL;
f0706e82 JB	191
	192	msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev);
	193	sdata->bss = &msdata->u.ap;
	194	break;
	195	}
	196	case IEEE80211_IF_TYPE_MNTR:
	197	dev->type = ARPHRD_IEEE80211_RADIOTAP;
40f7cac9	198	dev->hard_start_xmit = ieee80211_monitor_start_xmit;
f0706e82 JB	199	break;
	200	default:
	201	printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
	202	dev->name, __FUNCTION__, type);
	203	}
e9f207f0	204	ieee80211_debugfs_change_if_type(sdata, oldtype);
f0706e82 JB	205	}
	206
	207	/* Must be called with rtnl lock held. */
	208	void ieee80211_if_reinit(struct net_device *dev)
	209	{
	210	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	211	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	212	struct sta_info *sta;
	213	int i;
	214
	215	ASSERT_RTNL();
	216	ieee80211_if_sdata_deinit(sdata);
	217	for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
	218	if (!sdata->keys[i])
	219	continue;
	220	#if 0
	221	/* The interface is down at the moment, so there is not
	222	* really much point in disabling the keys at this point. */
	223	memset(addr, 0xff, ETH_ALEN);
	224	if (local->ops->set_key)
	225	local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr,
8f20fc24 JB	226	local->keys[i],
8f20fc24 JB	227	local->default_wep_only);
f0706e82 JB	228	#endif
	229	ieee80211_key_free(sdata->keys[i]);
	230	sdata->keys[i] = NULL;
	231	}
	232
	233	switch (sdata->type) {
	234	case IEEE80211_IF_TYPE_AP: {
	235	/* Remove all virtual interfaces that use this BSS
	236	* as their sdata->bss */
	237	struct ieee80211_sub_if_data tsdata, n;
	238	LIST_HEAD(tmp_list);
	239
	240	write_lock_bh(&local->sub_if_lock);
	241	list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) {
	242	if (tsdata != sdata && tsdata->bss == &sdata->u.ap) {
	243	printk(KERN_DEBUG "%s: removing virtual "
	244	"interface %s because its BSS interface"
	245	" is being removed\n",
	246	sdata->dev->name, tsdata->dev->name);
	247	list_move_tail(&tsdata->list, &tmp_list);
	248	}
	249	}
	250	write_unlock_bh(&local->sub_if_lock);
	251
	252	list_for_each_entry_safe(tsdata, n, &tmp_list, list)
	253	__ieee80211_if_del(local, tsdata);
	254
	255	kfree(sdata->u.ap.beacon_head);
	256	kfree(sdata->u.ap.beacon_tail);
	257	kfree(sdata->u.ap.generic_elem);
	258
	259	if (dev != local->mdev) {
	260	struct sk_buff *skb;
	261	while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
	262	local->total_ps_buffered--;
	263	dev_kfree_skb(skb);
	264	}
	265	}
	266
	267	break;
	268	}
	269	case IEEE80211_IF_TYPE_WDS:
	270	sta = sta_info_get(local, sdata->u.wds.remote_addr);
	271	if (sta) {
be8755e1	272	sta_info_free(sta);
f0706e82	273	sta_info_put(sta);
f0706e82 JB	274	} else {
	275	#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
	276	printk(KERN_DEBUG "%s: Someone had deleted my STA "
	277	"entry for the WDS link\n", dev->name);
	278	#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
	279	}
	280	break;
	281	case IEEE80211_IF_TYPE_STA:
	282	case IEEE80211_IF_TYPE_IBSS:
	283	kfree(sdata->u.sta.extra_ie);
	284	sdata->u.sta.extra_ie = NULL;
	285	kfree(sdata->u.sta.assocreq_ies);
	286	sdata->u.sta.assocreq_ies = NULL;
	287	kfree(sdata->u.sta.assocresp_ies);
	288	sdata->u.sta.assocresp_ies = NULL;
	289	if (sdata->u.sta.probe_resp) {
	290	dev_kfree_skb(sdata->u.sta.probe_resp);
	291	sdata->u.sta.probe_resp = NULL;
	292	}
	293
	294	break;
	295	case IEEE80211_IF_TYPE_MNTR:
	296	dev->type = ARPHRD_ETHER;
	297	break;
	298	}
	299
	300	/* remove all STAs that are bound to this virtual interface */
	301	sta_info_flush(local, dev);
	302
	303	memset(&sdata->u, 0, sizeof(sdata->u));
	304	ieee80211_if_sdata_init(sdata);
	305	}
	306
	307	/* Must be called with rtnl lock held. */
	308	void __ieee80211_if_del(struct ieee80211_local *local,
	309	struct ieee80211_sub_if_data *sdata)
	310	{
	311	struct net_device *dev = sdata->dev;
	312
e9f207f0	313	ieee80211_debugfs_remove_netdev(sdata);
f0706e82 JB	314	unregister_netdevice(dev);
	315	/* Except master interface, the net_device will be freed by
	316	* net_device->destructor (i. e. ieee80211_if_free). */
	317	}
	318
	319	/* Must be called with rtnl lock held. */
	320	int ieee80211_if_remove(struct net_device dev, const char name, int id)
	321	{
	322	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	323	struct ieee80211_sub_if_data sdata, n;
	324
	325	ASSERT_RTNL();
	326
	327	write_lock_bh(&local->sub_if_lock);
	328	list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) {
	329	if ((sdata->type == id \|\| id == -1) &&
	330	strcmp(name, sdata->dev->name) == 0 &&
	331	sdata->dev != local->mdev) {
	332	list_del(&sdata->list);
	333	write_unlock_bh(&local->sub_if_lock);
	334	__ieee80211_if_del(local, sdata);
f0706e82 JB	335	return 0;
	336	}
	337	}
	338	write_unlock_bh(&local->sub_if_lock);
	339	return -ENODEV;
	340	}
	341
	342	void ieee80211_if_free(struct net_device *dev)
	343	{
	344	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	345	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	346
	347	/* local->apdev must be NULL when freeing management interface */
	348	BUG_ON(dev == local->apdev);
	349	ieee80211_if_sdata_deinit(sdata);
	350	free_netdev(dev);
	351	}