[deliverable/linux.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"
#include "mesh.h"

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

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

	INIT_LIST_HEAD(&sdata->key_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 vif_params *params)
{
	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(*sdata) + local->hw.vif_data_size,
			    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->vif.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);

	if (ieee80211_vif_is_mesh(&sdata->vif) &&
	    params && params->mesh_id_len)
		ieee80211_if_sta_set_mesh_id(&sdata->u.sta,
					     params->mesh_id_len,
					     params->mesh_id);

	/* we're under RTNL so all this is fine */
	if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) {
		__ieee80211_if_del(local, sdata);
		return -ENODEV;
	}
	list_add_tail_rcu(&sdata->list, &local->interfaces);

	if (new_dev)
		*new_dev = ndev;

	return 0;

fail:
	free_netdev(ndev);
	return ret;
}

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->vif.type;

	/*
	 * We need to call this function on the master interface
	 * which already has a hard_start_xmit routine assigned
	 * which must not be changed.
	 */
	if (dev != sdata->local->mdev)
		dev->hard_start_xmit = ieee80211_subif_start_xmit;

	/*
	 * Called even when register_netdevice fails, it would
	 * oops if assigned before initialising the rest.
	 */
	dev->uninit = ieee80211_if_reinit;

	/* most have no BSS pointer */
	sdata->bss = NULL;
	sdata->vif.type = type;

	sdata->basic_rates = 0;

	switch (type) {
	case IEEE80211_IF_TYPE_WDS:
		/* nothing special */
		break;
	case IEEE80211_IF_TYPE_VLAN:
		sdata->u.vlan.ap = NULL;
		break;
	case IEEE80211_IF_TYPE_AP:
		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;
		INIT_LIST_HEAD(&sdata->u.ap.vlans);
		break;
	case IEEE80211_IF_TYPE_MESH_POINT:
	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;

		if (ieee80211_vif_is_mesh(&sdata->vif))
			ieee80211_mesh_init_sdata(sdata);
		break;
	}
	case IEEE80211_IF_TYPE_MNTR:
		dev->type = ARPHRD_IEEE80211_RADIOTAP;
		dev->hard_start_xmit = ieee80211_monitor_start_xmit;
		sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
				      MONITOR_FLAG_OTHER_BSS;
		break;
	default:
		printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
		       dev->name, __func__, 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;
	struct sk_buff *skb;

	ASSERT_RTNL();

	ieee80211_free_keys(sdata);

	ieee80211_if_sdata_deinit(sdata);

	/* Need to handle mesh specially to allow eliding the function call */
	if (ieee80211_vif_is_mesh(&sdata->vif))
		mesh_rmc_free(dev);

	switch (sdata->vif.type) {
	case IEEE80211_IF_TYPE_INVALID:
		/* cannot happen */
		WARN_ON(1);
		break;
	case IEEE80211_IF_TYPE_AP: {
		/* Remove all virtual interfaces that use this BSS
		 * as their sdata->bss */
		struct ieee80211_sub_if_data *tsdata, *n;
		struct beacon_data *beacon;

		list_for_each_entry_safe(tsdata, n, &local->interfaces, 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_del_rcu(&tsdata->list);
				/*
				 * We have lots of time and can afford
				 * to sync for each interface
				 */
				synchronize_rcu();
				__ieee80211_if_del(local, tsdata);
			}
		}

		beacon = sdata->u.ap.beacon;
		rcu_assign_pointer(sdata->u.ap.beacon, NULL);
		synchronize_rcu();
		kfree(beacon);

		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_MESH_POINT:
	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;
	case IEEE80211_IF_TYPE_VLAN:
		sdata->u.vlan.ap = NULL;
		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();

	list_for_each_entry_safe(sdata, n, &local->interfaces, list) {
		if ((sdata->vif.type == id || id == -1) &&
		    strcmp(name, sdata->dev->name) == 0 &&
		    sdata->dev != local->mdev) {
			list_del_rcu(&sdata->list);
			synchronize_rcu();
			__ieee80211_if_del(local, sdata);
			return 0;
		}
	}
	return -ENODEV;
}

void ieee80211_if_free(struct net_device *dev)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	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"
ee385855	18	#include "mesh.h"
f0706e82 JB	19
	20	void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata)
	21	{
	22	int i;
	23
	24	/* Default values for sub-interface parameters */
	25	sdata->drop_unencrypted = 0;
f0706e82 JB	26	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
f0706e82 JB	27	skb_queue_head_init(&sdata->fragments[i].skb_list);
11a843b7 JB	28
11a843b7 JB	29	INIT_LIST_HEAD(&sdata->key_list);
f0706e82 JB	30	}
	31
	32	static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata)
	33	{
	34	int i;
	35
	36	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
	37	__skb_queue_purge(&sdata->fragments[i].skb_list);
	38	}
	39	}
	40
	41	/* Must be called with rtnl lock held. */
	42	int ieee80211_if_add(struct net_device dev, const char name,
ee385855 LCC	43	struct net_device **new_dev, int type,
ee385855 LCC	44	struct vif_params *params)
f0706e82 JB	45	{
	46	struct net_device *ndev;
	47	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	48	struct ieee80211_sub_if_data *sdata = NULL;
	49	int ret;
	50
	51	ASSERT_RTNL();
32bfd35d	52	ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size,
f0706e82 JB	53	name, ieee80211_if_setup);
	54	if (!ndev)
	55	return -ENOMEM;
	56
	57	ret = dev_alloc_name(ndev, ndev->name);
	58	if (ret < 0)
	59	goto fail;
	60
	61	memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
	62	ndev->base_addr = dev->base_addr;
	63	ndev->irq = dev->irq;
	64	ndev->mem_start = dev->mem_start;
	65	ndev->mem_end = dev->mem_end;
	66	SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
	67
	68	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
	69	ndev->ieee80211_ptr = &sdata->wdev;
	70	sdata->wdev.wiphy = local->hw.wiphy;
51fb61e7	71	sdata->vif.type = IEEE80211_IF_TYPE_AP;
f0706e82 JB	72	sdata->dev = ndev;
	73	sdata->local = local;
	74	ieee80211_if_sdata_init(sdata);
	75
	76	ret = register_netdevice(ndev);
	77	if (ret)
	78	goto fail;
	79
e9f207f0	80	ieee80211_debugfs_add_netdev(sdata);
f0706e82 JB	81	ieee80211_if_set_type(ndev, type);
f0706e82 JB	82
902acc78 JB	83	if (ieee80211_vif_is_mesh(&sdata->vif) &&
	84	params && params->mesh_id_len)
	85	ieee80211_if_sta_set_mesh_id(&sdata->u.sta,
	86	params->mesh_id_len,
	87	params->mesh_id);
ee385855	88
79010420	89	/* we're under RTNL so all this is fine */
f0706e82	90	if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) {
f0706e82 JB	91	__ieee80211_if_del(local, sdata);
	92	return -ENODEV;
	93	}
79010420 JB	94	list_add_tail_rcu(&sdata->list, &local->interfaces);
79010420 JB	95
f0706e82 JB	96	if (new_dev)
f0706e82 JB	97	*new_dev = ndev;
f0706e82	98
f0706e82 JB	99	return 0;
	100
	101	fail:
	102	free_netdev(ndev);
	103	return ret;
	104	}
	105
f0706e82 JB	106	void ieee80211_if_set_type(struct net_device *dev, int type)
	107	{
	108	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7	109	int oldtype = sdata->vif.type;
f0706e82	110
5b2812e9 JB	111	/*
	112	* We need to call this function on the master interface
	113	* which already has a hard_start_xmit routine assigned
	114	* which must not be changed.
	115	*/
0654ff05	116	if (dev != sdata->local->mdev)
5b2812e9 JB	117	dev->hard_start_xmit = ieee80211_subif_start_xmit;
	118
	119	/*
	120	* Called even when register_netdevice fails, it would
	121	* oops if assigned before initialising the rest.
	122	*/
	123	dev->uninit = ieee80211_if_reinit;
	124
	125	/* most have no BSS pointer */
	126	sdata->bss = NULL;
51fb61e7	127	sdata->vif.type = type;
5b2812e9	128
8318d78a JB	129	sdata->basic_rates = 0;
8318d78a JB	130
f0706e82 JB	131	switch (type) {
f0706e82 JB	132	case IEEE80211_IF_TYPE_WDS:
5b2812e9	133	/* nothing special */
f0706e82 JB	134	break;
f0706e82 JB	135	case IEEE80211_IF_TYPE_VLAN:
0ec3ca44	136	sdata->u.vlan.ap = NULL;
f0706e82 JB	137	break;
f0706e82 JB	138	case IEEE80211_IF_TYPE_AP:
f0706e82 JB	139	sdata->u.ap.force_unicast_rateidx = -1;
	140	sdata->u.ap.max_ratectrl_rateidx = -1;
	141	skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
	142	sdata->bss = &sdata->u.ap;
0ec3ca44	143	INIT_LIST_HEAD(&sdata->u.ap.vlans);
f0706e82	144	break;
ee385855	145	case IEEE80211_IF_TYPE_MESH_POINT:
f0706e82 JB	146	case IEEE80211_IF_TYPE_STA:
	147	case IEEE80211_IF_TYPE_IBSS: {
	148	struct ieee80211_sub_if_data *msdata;
	149	struct ieee80211_if_sta *ifsta;
	150
	151	ifsta = &sdata->u.sta;
	152	INIT_WORK(&ifsta->work, ieee80211_sta_work);
	153	setup_timer(&ifsta->timer, ieee80211_sta_timer,
	154	(unsigned long) sdata);
	155	skb_queue_head_init(&ifsta->skb_queue);
	156
	157	ifsta->capab = WLAN_CAPABILITY_ESS;
	158	ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN \|
	159	IEEE80211_AUTH_ALG_SHARED_KEY;
d6f2da5b JS	160	ifsta->flags \|= IEEE80211_STA_CREATE_IBSS \|
	161	IEEE80211_STA_WMM_ENABLED \|
	162	IEEE80211_STA_AUTO_BSSID_SEL \|
	163	IEEE80211_STA_AUTO_CHANNEL_SEL;
f0706e82 JB	164
	165	msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev);
	166	sdata->bss = &msdata->u.ap;
ee385855	167
902acc78 JB	168	if (ieee80211_vif_is_mesh(&sdata->vif))
902acc78 JB	169	ieee80211_mesh_init_sdata(sdata);
f0706e82 JB	170	break;
	171	}
	172	case IEEE80211_IF_TYPE_MNTR:
	173	dev->type = ARPHRD_IEEE80211_RADIOTAP;
40f7cac9	174	dev->hard_start_xmit = ieee80211_monitor_start_xmit;
8cc9a739 MW	175	sdata->u.mntr_flags = MONITOR_FLAG_CONTROL \|
8cc9a739 MW	176	MONITOR_FLAG_OTHER_BSS;
f0706e82 JB	177	break;
	178	default:
	179	printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
0dc47877	180	dev->name, __func__, type);
f0706e82	181	}
e9f207f0	182	ieee80211_debugfs_change_if_type(sdata, oldtype);
f0706e82 JB	183	}
	184
	185	/* Must be called with rtnl lock held. */
	186	void ieee80211_if_reinit(struct net_device *dev)
	187	{
	188	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	189	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	190	struct sta_info *sta;
5b2812e9	191	struct sk_buff *skb;
f0706e82 JB	192
f0706e82 JB	193	ASSERT_RTNL();
11a843b7 JB	194
	195	ieee80211_free_keys(sdata);
	196
f0706e82	197	ieee80211_if_sdata_deinit(sdata);
f0706e82	198
902acc78 JB	199	/* Need to handle mesh specially to allow eliding the function call */
	200	if (ieee80211_vif_is_mesh(&sdata->vif))
	201	mesh_rmc_free(dev);
	202
51fb61e7	203	switch (sdata->vif.type) {
a2897552 JB	204	case IEEE80211_IF_TYPE_INVALID:
	205	/* cannot happen */
	206	WARN_ON(1);
	207	break;
f0706e82 JB	208	case IEEE80211_IF_TYPE_AP: {
	209	/* Remove all virtual interfaces that use this BSS
	210	* as their sdata->bss */
	211	struct ieee80211_sub_if_data tsdata, n;
e6a5ddf2	212	struct beacon_data *beacon;
f0706e82	213
79010420	214	list_for_each_entry_safe(tsdata, n, &local->interfaces, list) {
f0706e82 JB	215	if (tsdata != sdata && tsdata->bss == &sdata->u.ap) {
	216	printk(KERN_DEBUG "%s: removing virtual "
	217	"interface %s because its BSS interface"
	218	" is being removed\n",
	219	sdata->dev->name, tsdata->dev->name);
79010420 JB	220	list_del_rcu(&tsdata->list);
	221	/*
	222	* We have lots of time and can afford
	223	* to sync for each interface
	224	*/
	225	synchronize_rcu();
	226	__ieee80211_if_del(local, tsdata);
f0706e82 JB	227	}
f0706e82 JB	228	}
f0706e82	229
e6a5ddf2 JB	230	beacon = sdata->u.ap.beacon;
	231	rcu_assign_pointer(sdata->u.ap.beacon, NULL);
	232	synchronize_rcu();
	233	kfree(beacon);
f0706e82	234
5b2812e9 JB	235	while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
	236	local->total_ps_buffered--;
	237	dev_kfree_skb(skb);
f0706e82 JB	238	}
	239
	240	break;
	241	}
	242	case IEEE80211_IF_TYPE_WDS:
	243	sta = sta_info_get(local, sdata->u.wds.remote_addr);
	244	if (sta) {
be8755e1	245	sta_info_free(sta);
f0706e82	246	sta_info_put(sta);
f0706e82 JB	247	} else {
	248	#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
	249	printk(KERN_DEBUG "%s: Someone had deleted my STA "
	250	"entry for the WDS link\n", dev->name);
	251	#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
	252	}
	253	break;
6032f934	254	case IEEE80211_IF_TYPE_MESH_POINT:
f0706e82 JB	255	case IEEE80211_IF_TYPE_STA:
	256	case IEEE80211_IF_TYPE_IBSS:
	257	kfree(sdata->u.sta.extra_ie);
	258	sdata->u.sta.extra_ie = NULL;
	259	kfree(sdata->u.sta.assocreq_ies);
	260	sdata->u.sta.assocreq_ies = NULL;
	261	kfree(sdata->u.sta.assocresp_ies);
	262	sdata->u.sta.assocresp_ies = NULL;
	263	if (sdata->u.sta.probe_resp) {
	264	dev_kfree_skb(sdata->u.sta.probe_resp);
	265	sdata->u.sta.probe_resp = NULL;
	266	}
	267
	268	break;
	269	case IEEE80211_IF_TYPE_MNTR:
	270	dev->type = ARPHRD_ETHER;
	271	break;
0ec3ca44 JB	272	case IEEE80211_IF_TYPE_VLAN:
	273	sdata->u.vlan.ap = NULL;
	274	break;
f0706e82 JB	275	}
	276
	277	/* remove all STAs that are bound to this virtual interface */
	278	sta_info_flush(local, dev);
	279
	280	memset(&sdata->u, 0, sizeof(sdata->u));
	281	ieee80211_if_sdata_init(sdata);
	282	}
	283
	284	/* Must be called with rtnl lock held. */
	285	void __ieee80211_if_del(struct ieee80211_local *local,
	286	struct ieee80211_sub_if_data *sdata)
	287	{
	288	struct net_device *dev = sdata->dev;
	289
e9f207f0	290	ieee80211_debugfs_remove_netdev(sdata);
f0706e82 JB	291	unregister_netdevice(dev);
	292	/* Except master interface, the net_device will be freed by
	293	* net_device->destructor (i. e. ieee80211_if_free). */
	294	}
	295
	296	/* Must be called with rtnl lock held. */
	297	int ieee80211_if_remove(struct net_device dev, const char name, int id)
	298	{
	299	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	300	struct ieee80211_sub_if_data sdata, n;
	301
	302	ASSERT_RTNL();
	303
79010420	304	list_for_each_entry_safe(sdata, n, &local->interfaces, list) {
51fb61e7	305	if ((sdata->vif.type == id \|\| id == -1) &&
f0706e82 JB	306	strcmp(name, sdata->dev->name) == 0 &&
f0706e82 JB	307	sdata->dev != local->mdev) {
79010420 JB	308	list_del_rcu(&sdata->list);
79010420 JB	309	synchronize_rcu();
f0706e82	310	__ieee80211_if_del(local, sdata);
f0706e82 JB	311	return 0;
	312	}
	313	}
f0706e82 JB	314	return -ENODEV;
	315	}
	316
	317	void ieee80211_if_free(struct net_device *dev)
	318	{
f0706e82 JB	319	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 JB	320
f0706e82 JB	321	ieee80211_if_sdata_deinit(sdata);
	322	free_netdev(dev);
	323	}