net/mac80211/debugfs_netdev.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
  * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
  *
  * 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/device.h>
 #include <linux/if.h>
 #include <linux/interrupt.h>
 #include <linux/netdevice.h>
 #include <linux/rtnetlink.h>
 #include <linux/notifier.h>
 #include <net/mac80211.h>
 #include <net/cfg80211.h>
 #include "ieee80211_i.h"
 #include "ieee80211_rate.h"
 #include "debugfs.h"
 #include "debugfs_netdev.h"

 static ssize_t ieee80211_if_read(
 	struct ieee80211_sub_if_data *sdata,
 	char __user *userbuf,
 	size_t count, loff_t *ppos,
 	ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
 {
 	char buf[70];
 	ssize_t ret = -EINVAL;

 	read_lock(&dev_base_lock);
 	if (sdata->dev->reg_state == NETREG_REGISTERED) {
 		ret = (*format)(sdata, buf, sizeof(buf));
 		ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
 	}
 	read_unlock(&dev_base_lock);
 	return ret;
 }

 #define IEEE80211_IF_FMT(name, field, format_string)			\
 static ssize_t ieee80211_if_fmt_##name(					\
 	const struct ieee80211_sub_if_data *sdata, char *buf,		\
 	int buflen)							\
 {									\
 	return scnprintf(buf, buflen, format_string, sdata->field);	\
 }
 #define IEEE80211_IF_FMT_DEC(name, field)				\
 		IEEE80211_IF_FMT(name, field, "%d\n")
 #define IEEE80211_IF_FMT_HEX(name, field)				\
 		IEEE80211_IF_FMT(name, field, "%#x\n")
 #define IEEE80211_IF_FMT_SIZE(name, field)				\
 		IEEE80211_IF_FMT(name, field, "%zd\n")

 #define IEEE80211_IF_FMT_ATOMIC(name, field)				\
 static ssize_t ieee80211_if_fmt_##name(					\
 	const struct ieee80211_sub_if_data *sdata,			\
 	char *buf, int buflen)						\
 {									\
 	return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
 }

 #define IEEE80211_IF_FMT_MAC(name, field)				\
 static ssize_t ieee80211_if_fmt_##name(					\
 	const struct ieee80211_sub_if_data *sdata, char *buf,		\
 	int buflen)							\
 {									\
 	DECLARE_MAC_BUF(mac);						\
 	return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
 }

 #define __IEEE80211_IF_FILE(name)					\
 static ssize_t ieee80211_if_read_##name(struct file *file,		\
 					char __user *userbuf,		\
 					size_t count, loff_t *ppos)	\
 {									\
 	return ieee80211_if_read(file->private_data,			\
 				 userbuf, count, ppos,			\
 				 ieee80211_if_fmt_##name);		\
 }									\
 static const struct file_operations name##_ops = {			\
 	.read = ieee80211_if_read_##name,				\
 	.open = mac80211_open_file_generic,				\
 }

 #define IEEE80211_IF_FILE(name, field, format)				\
 		IEEE80211_IF_FMT_##format(name, field)			\
 		__IEEE80211_IF_FILE(name)

 /* common attributes */
 IEEE80211_IF_FILE(channel_use, channel_use, DEC);
 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 IEEE80211_IF_FILE(ieee802_1x_pac, ieee802_1x_pac, DEC);

 /* STA/IBSS attributes */
 IEEE80211_IF_FILE(state, u.sta.state, DEC);
 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);

 static ssize_t ieee80211_if_fmt_flags(
 	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 {
 	return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
 		 sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
 		 sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
 		 sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
 		 sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
 		 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
 		 sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
 		 sdata->flags & IEEE80211_SDATA_USE_PROTECTION ? "CTS prot\n" : "");
 }
 __IEEE80211_IF_FILE(flags);

 /* AP attributes */
 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
 IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
 IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);

 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 {
 	return scnprintf(buf, buflen, "%u\n",
 			 skb_queue_len(&sdata->u.ap.ps_bc_buf));
 }
 __IEEE80211_IF_FILE(num_buffered_multicast);

 static ssize_t ieee80211_if_fmt_beacon_head_len(
 	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 {
 	if (sdata->u.ap.beacon_head)
 		return scnprintf(buf, buflen, "%d\n",
 				 sdata->u.ap.beacon_head_len);
 	return scnprintf(buf, buflen, "\n");
 }
 __IEEE80211_IF_FILE(beacon_head_len);

 static ssize_t ieee80211_if_fmt_beacon_tail_len(
 	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 {
 	if (sdata->u.ap.beacon_tail)
 		return scnprintf(buf, buflen, "%d\n",
 				 sdata->u.ap.beacon_tail_len);
 	return scnprintf(buf, buflen, "\n");
 }
 __IEEE80211_IF_FILE(beacon_tail_len);

 /* WDS attributes */
 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);

 #define DEBUGFS_ADD(name, type)\
 	sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
 		sdata->debugfsdir, sdata, &name##_ops);

 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 {
 	DEBUGFS_ADD(channel_use, sta);
 	DEBUGFS_ADD(drop_unencrypted, sta);
 	DEBUGFS_ADD(ieee802_1x_pac, sta);
 	DEBUGFS_ADD(state, sta);
 	DEBUGFS_ADD(bssid, sta);
 	DEBUGFS_ADD(prev_bssid, sta);
 	DEBUGFS_ADD(ssid_len, sta);
 	DEBUGFS_ADD(aid, sta);
 	DEBUGFS_ADD(ap_capab, sta);
 	DEBUGFS_ADD(capab, sta);
 	DEBUGFS_ADD(extra_ie_len, sta);
 	DEBUGFS_ADD(auth_tries, sta);
 	DEBUGFS_ADD(assoc_tries, sta);
 	DEBUGFS_ADD(auth_algs, sta);
 	DEBUGFS_ADD(auth_alg, sta);
 	DEBUGFS_ADD(auth_transaction, sta);
 	DEBUGFS_ADD(flags, sta);
 }

 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 {
 	DEBUGFS_ADD(channel_use, ap);
 	DEBUGFS_ADD(drop_unencrypted, ap);
 	DEBUGFS_ADD(ieee802_1x_pac, ap);
 	DEBUGFS_ADD(num_sta_ps, ap);
 	DEBUGFS_ADD(dtim_period, ap);
 	DEBUGFS_ADD(dtim_count, ap);
 	DEBUGFS_ADD(num_beacons, ap);
 	DEBUGFS_ADD(force_unicast_rateidx, ap);
 	DEBUGFS_ADD(max_ratectrl_rateidx, ap);
 	DEBUGFS_ADD(num_buffered_multicast, ap);
 	DEBUGFS_ADD(beacon_head_len, ap);
 	DEBUGFS_ADD(beacon_tail_len, ap);
 }

 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 {
 	DEBUGFS_ADD(channel_use, wds);
 	DEBUGFS_ADD(drop_unencrypted, wds);
 	DEBUGFS_ADD(ieee802_1x_pac, wds);
 	DEBUGFS_ADD(peer, wds);
 }

 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 {
 	DEBUGFS_ADD(channel_use, vlan);
 	DEBUGFS_ADD(drop_unencrypted, vlan);
 	DEBUGFS_ADD(ieee802_1x_pac, vlan);
 }

 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 {
 }

 static void add_files(struct ieee80211_sub_if_data *sdata)
 {
 	if (!sdata->debugfsdir)
 		return;

 	switch (sdata->type) {
 	case IEEE80211_IF_TYPE_STA:
 	case IEEE80211_IF_TYPE_IBSS:
 		add_sta_files(sdata);
 		break;
 	case IEEE80211_IF_TYPE_AP:
 		add_ap_files(sdata);
 		break;
 	case IEEE80211_IF_TYPE_WDS:
 		add_wds_files(sdata);
 		break;
 	case IEEE80211_IF_TYPE_MNTR:
 		add_monitor_files(sdata);
 		break;
 	case IEEE80211_IF_TYPE_VLAN:
 		add_vlan_files(sdata);
 		break;
 	default:
 		break;
 	}
 }

 #define DEBUGFS_DEL(name, type)					\
 	do {							\
 		debugfs_remove(sdata->debugfs.type.name);	\
 		sdata->debugfs.type.name = NULL;		\
 	} while (0)

 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
 {
 	DEBUGFS_DEL(channel_use, sta);
 	DEBUGFS_DEL(drop_unencrypted, sta);
 	DEBUGFS_DEL(ieee802_1x_pac, sta);
 	DEBUGFS_DEL(state, sta);
 	DEBUGFS_DEL(bssid, sta);
 	DEBUGFS_DEL(prev_bssid, sta);
 	DEBUGFS_DEL(ssid_len, sta);
 	DEBUGFS_DEL(aid, sta);
 	DEBUGFS_DEL(ap_capab, sta);
 	DEBUGFS_DEL(capab, sta);
 	DEBUGFS_DEL(extra_ie_len, sta);
 	DEBUGFS_DEL(auth_tries, sta);
 	DEBUGFS_DEL(assoc_tries, sta);
 	DEBUGFS_DEL(auth_algs, sta);
 	DEBUGFS_DEL(auth_alg, sta);
 	DEBUGFS_DEL(auth_transaction, sta);
 	DEBUGFS_DEL(flags, sta);
 }

 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
 {
 	DEBUGFS_DEL(channel_use, ap);
 	DEBUGFS_DEL(drop_unencrypted, ap);
 	DEBUGFS_DEL(ieee802_1x_pac, ap);
 	DEBUGFS_DEL(num_sta_ps, ap);
 	DEBUGFS_DEL(dtim_period, ap);
 	DEBUGFS_DEL(dtim_count, ap);
 	DEBUGFS_DEL(num_beacons, ap);
 	DEBUGFS_DEL(force_unicast_rateidx, ap);
 	DEBUGFS_DEL(max_ratectrl_rateidx, ap);
 	DEBUGFS_DEL(num_buffered_multicast, ap);
 	DEBUGFS_DEL(beacon_head_len, ap);
 	DEBUGFS_DEL(beacon_tail_len, ap);
 }

 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
 {
 	DEBUGFS_DEL(channel_use, wds);
 	DEBUGFS_DEL(drop_unencrypted, wds);
 	DEBUGFS_DEL(ieee802_1x_pac, wds);
 	DEBUGFS_DEL(peer, wds);
 }

 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
 {
 	DEBUGFS_DEL(channel_use, vlan);
 	DEBUGFS_DEL(drop_unencrypted, vlan);
 	DEBUGFS_DEL(ieee802_1x_pac, vlan);
 }

 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
 {
 }

 static void del_files(struct ieee80211_sub_if_data *sdata, int type)
 {
 	if (!sdata->debugfsdir)
 		return;

 	switch (type) {
 	case IEEE80211_IF_TYPE_STA:
 	case IEEE80211_IF_TYPE_IBSS:
 		del_sta_files(sdata);
 		break;
 	case IEEE80211_IF_TYPE_AP:
 		del_ap_files(sdata);
 		break;
 	case IEEE80211_IF_TYPE_WDS:
 		del_wds_files(sdata);
 		break;
 	case IEEE80211_IF_TYPE_MNTR:
 		del_monitor_files(sdata);
 		break;
 	case IEEE80211_IF_TYPE_VLAN:
 		del_vlan_files(sdata);
 		break;
 	default:
 		break;
 	}
 }

 static int notif_registered;

 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 {
 	char buf[10+IFNAMSIZ];

 	if (!notif_registered)
 		return;

 	sprintf(buf, "netdev:%s", sdata->dev->name);
 	sdata->debugfsdir = debugfs_create_dir(buf,
 		sdata->local->hw.wiphy->debugfsdir);
 }

 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 {
 	del_files(sdata, sdata->type);
 	debugfs_remove(sdata->debugfsdir);
 	sdata->debugfsdir = NULL;
 }

 void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
 				      int oldtype)
 {
 	del_files(sdata, oldtype);
 	add_files(sdata);
 }

 static int netdev_notify(struct notifier_block * nb,
 			 unsigned long state,
 			 void *ndev)
 {
 	struct net_device *dev = ndev;
 	struct dentry *dir;
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	char buf[10+IFNAMSIZ];

 	if (state != NETDEV_CHANGENAME)
 		return 0;

 	if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
 		return 0;

 	if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
 		return 0;

 	sprintf(buf, "netdev:%s", dev->name);
 	dir = sdata->debugfsdir;
 	if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 		printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 		       "dir to %s\n", buf);

 	return 0;
 }

 static struct notifier_block mac80211_debugfs_netdev_notifier = {
 	.notifier_call = netdev_notify,
 };

 void ieee80211_debugfs_netdev_init(void)
 {
 	int err;

 	err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 	if (err) {
 		printk(KERN_ERR
 		       "mac80211: failed to install netdev notifier,"
 		       " disabling per-netdev debugfs!\n");
 	} else
 		notif_registered = 1;
 }

 void ieee80211_debugfs_netdev_exit(void)
 {
 	unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 	notif_registered = 0;
 }
	/*
	* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
	*
	* 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/device.h>
	#include <linux/if.h>
	#include <linux/interrupt.h>
	#include <linux/netdevice.h>
	#include <linux/rtnetlink.h>
	#include <linux/notifier.h>
	#include <net/mac80211.h>
	#include <net/cfg80211.h>
	#include "ieee80211_i.h"
	#include "ieee80211_rate.h"
	#include "debugfs.h"
	#include "debugfs_netdev.h"

	static ssize_t ieee80211_if_read(
	struct ieee80211_sub_if_data *sdata,
	char __user *userbuf,
	size_t count, loff_t *ppos,
	ssize_t (format)(const struct ieee80211_sub_if_data , char *, int))
	{
	char buf[70];
	ssize_t ret = -EINVAL;

	read_lock(&dev_base_lock);
	if (sdata->dev->reg_state == NETREG_REGISTERED) {
	ret = (*format)(sdata, buf, sizeof(buf));
	ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
	}
	read_unlock(&dev_base_lock);
	return ret;
	}

	#define IEEE80211_IF_FMT(name, field, format_string) \
	static ssize_t ieee80211_if_fmt_##name( \
	const struct ieee80211_sub_if_data sdata, char buf, \
	int buflen) \
	{ \
	return scnprintf(buf, buflen, format_string, sdata->field); \
	}
	#define IEEE80211_IF_FMT_DEC(name, field) \
	IEEE80211_IF_FMT(name, field, "%d\n")
	#define IEEE80211_IF_FMT_HEX(name, field) \
	IEEE80211_IF_FMT(name, field, "%#x\n")
	#define IEEE80211_IF_FMT_SIZE(name, field) \
	IEEE80211_IF_FMT(name, field, "%zd\n")

	#define IEEE80211_IF_FMT_ATOMIC(name, field) \
	static ssize_t ieee80211_if_fmt_##name( \
	const struct ieee80211_sub_if_data *sdata, \
	char *buf, int buflen) \
	{ \
	return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
	}

	#define IEEE80211_IF_FMT_MAC(name, field) \
	static ssize_t ieee80211_if_fmt_##name( \
	const struct ieee80211_sub_if_data sdata, char buf, \
	int buflen) \
	{ \
	DECLARE_MAC_BUF(mac); \
	return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
	}

	#define __IEEE80211_IF_FILE(name) \
	static ssize_t ieee80211_if_read_##name(struct file *file, \
	char __user *userbuf, \
	size_t count, loff_t *ppos) \
	{ \
	return ieee80211_if_read(file->private_data, \
	userbuf, count, ppos, \
	ieee80211_if_fmt_##name); \
	} \
	static const struct file_operations name##_ops = { \
	.read = ieee80211_if_read_##name, \
	.open = mac80211_open_file_generic, \
	}

	#define IEEE80211_IF_FILE(name, field, format) \
	IEEE80211_IF_FMT_##format(name, field) \
	__IEEE80211_IF_FILE(name)

	/* common attributes */
	IEEE80211_IF_FILE(channel_use, channel_use, DEC);
	IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
	IEEE80211_IF_FILE(ieee802_1x_pac, ieee802_1x_pac, DEC);

	/* STA/IBSS attributes */
	IEEE80211_IF_FILE(state, u.sta.state, DEC);
	IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
	IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
	IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
	IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
	IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
	IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
	IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
	IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
	IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
	IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
	IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
	IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);

	static ssize_t ieee80211_if_fmt_flags(
	const struct ieee80211_sub_if_data sdata, char buf, int buflen)
	{
	return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
	sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
	sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
	sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
	sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
	sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
	sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
	sdata->flags & IEEE80211_SDATA_USE_PROTECTION ? "CTS prot\n" : "");
	}
	__IEEE80211_IF_FILE(flags);

	/* AP attributes */
	IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
	IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
	IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
	IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
	IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
	IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);

	static ssize_t ieee80211_if_fmt_num_buffered_multicast(
	const struct ieee80211_sub_if_data sdata, char buf, int buflen)
	{
	return scnprintf(buf, buflen, "%u\n",
	skb_queue_len(&sdata->u.ap.ps_bc_buf));
	}
	__IEEE80211_IF_FILE(num_buffered_multicast);

	static ssize_t ieee80211_if_fmt_beacon_head_len(
	const struct ieee80211_sub_if_data sdata, char buf, int buflen)
	{
	if (sdata->u.ap.beacon_head)
	return scnprintf(buf, buflen, "%d\n",
	sdata->u.ap.beacon_head_len);
	return scnprintf(buf, buflen, "\n");
	}
	__IEEE80211_IF_FILE(beacon_head_len);

	static ssize_t ieee80211_if_fmt_beacon_tail_len(
	const struct ieee80211_sub_if_data sdata, char buf, int buflen)
	{
	if (sdata->u.ap.beacon_tail)
	return scnprintf(buf, buflen, "%d\n",
	sdata->u.ap.beacon_tail_len);
	return scnprintf(buf, buflen, "\n");
	}
	__IEEE80211_IF_FILE(beacon_tail_len);

	/* WDS attributes */
	IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);

	#define DEBUGFS_ADD(name, type)\
	sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
	sdata->debugfsdir, sdata, &name##_ops);

	static void add_sta_files(struct ieee80211_sub_if_data *sdata)
	{
	DEBUGFS_ADD(channel_use, sta);
	DEBUGFS_ADD(drop_unencrypted, sta);
	DEBUGFS_ADD(ieee802_1x_pac, sta);
	DEBUGFS_ADD(state, sta);
	DEBUGFS_ADD(bssid, sta);
	DEBUGFS_ADD(prev_bssid, sta);
	DEBUGFS_ADD(ssid_len, sta);
	DEBUGFS_ADD(aid, sta);
	DEBUGFS_ADD(ap_capab, sta);
	DEBUGFS_ADD(capab, sta);
	DEBUGFS_ADD(extra_ie_len, sta);
	DEBUGFS_ADD(auth_tries, sta);
	DEBUGFS_ADD(assoc_tries, sta);
	DEBUGFS_ADD(auth_algs, sta);
	DEBUGFS_ADD(auth_alg, sta);
	DEBUGFS_ADD(auth_transaction, sta);
	DEBUGFS_ADD(flags, sta);
	}

	static void add_ap_files(struct ieee80211_sub_if_data *sdata)
	{
	DEBUGFS_ADD(channel_use, ap);
	DEBUGFS_ADD(drop_unencrypted, ap);
	DEBUGFS_ADD(ieee802_1x_pac, ap);
	DEBUGFS_ADD(num_sta_ps, ap);
	DEBUGFS_ADD(dtim_period, ap);
	DEBUGFS_ADD(dtim_count, ap);
	DEBUGFS_ADD(num_beacons, ap);
	DEBUGFS_ADD(force_unicast_rateidx, ap);
	DEBUGFS_ADD(max_ratectrl_rateidx, ap);
	DEBUGFS_ADD(num_buffered_multicast, ap);
	DEBUGFS_ADD(beacon_head_len, ap);
	DEBUGFS_ADD(beacon_tail_len, ap);
	}

	static void add_wds_files(struct ieee80211_sub_if_data *sdata)
	{
	DEBUGFS_ADD(channel_use, wds);
	DEBUGFS_ADD(drop_unencrypted, wds);
	DEBUGFS_ADD(ieee802_1x_pac, wds);
	DEBUGFS_ADD(peer, wds);
	}

	static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
	{
	DEBUGFS_ADD(channel_use, vlan);
	DEBUGFS_ADD(drop_unencrypted, vlan);
	DEBUGFS_ADD(ieee802_1x_pac, vlan);
	}

	static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
	{
	}

	static void add_files(struct ieee80211_sub_if_data *sdata)
	{
	if (!sdata->debugfsdir)
	return;

	switch (sdata->type) {
	case IEEE80211_IF_TYPE_STA:
	case IEEE80211_IF_TYPE_IBSS:
	add_sta_files(sdata);
	break;
	case IEEE80211_IF_TYPE_AP:
	add_ap_files(sdata);
	break;
	case IEEE80211_IF_TYPE_WDS:
	add_wds_files(sdata);
	break;
	case IEEE80211_IF_TYPE_MNTR:
	add_monitor_files(sdata);
	break;
	case IEEE80211_IF_TYPE_VLAN:
	add_vlan_files(sdata);
	break;
	default:
	break;
	}
	}

	#define DEBUGFS_DEL(name, type) \
	do { \
	debugfs_remove(sdata->debugfs.type.name); \
	sdata->debugfs.type.name = NULL; \
	} while (0)

	static void del_sta_files(struct ieee80211_sub_if_data *sdata)
	{
	DEBUGFS_DEL(channel_use, sta);
	DEBUGFS_DEL(drop_unencrypted, sta);
	DEBUGFS_DEL(ieee802_1x_pac, sta);
	DEBUGFS_DEL(state, sta);
	DEBUGFS_DEL(bssid, sta);
	DEBUGFS_DEL(prev_bssid, sta);
	DEBUGFS_DEL(ssid_len, sta);
	DEBUGFS_DEL(aid, sta);
	DEBUGFS_DEL(ap_capab, sta);
	DEBUGFS_DEL(capab, sta);
	DEBUGFS_DEL(extra_ie_len, sta);
	DEBUGFS_DEL(auth_tries, sta);
	DEBUGFS_DEL(assoc_tries, sta);
	DEBUGFS_DEL(auth_algs, sta);
	DEBUGFS_DEL(auth_alg, sta);
	DEBUGFS_DEL(auth_transaction, sta);
	DEBUGFS_DEL(flags, sta);
	}

	static void del_ap_files(struct ieee80211_sub_if_data *sdata)
	{
	DEBUGFS_DEL(channel_use, ap);
	DEBUGFS_DEL(drop_unencrypted, ap);
	DEBUGFS_DEL(ieee802_1x_pac, ap);
	DEBUGFS_DEL(num_sta_ps, ap);
	DEBUGFS_DEL(dtim_period, ap);
	DEBUGFS_DEL(dtim_count, ap);
	DEBUGFS_DEL(num_beacons, ap);
	DEBUGFS_DEL(force_unicast_rateidx, ap);
	DEBUGFS_DEL(max_ratectrl_rateidx, ap);
	DEBUGFS_DEL(num_buffered_multicast, ap);
	DEBUGFS_DEL(beacon_head_len, ap);
	DEBUGFS_DEL(beacon_tail_len, ap);
	}

	static void del_wds_files(struct ieee80211_sub_if_data *sdata)
	{
	DEBUGFS_DEL(channel_use, wds);
	DEBUGFS_DEL(drop_unencrypted, wds);
	DEBUGFS_DEL(ieee802_1x_pac, wds);
	DEBUGFS_DEL(peer, wds);
	}

	static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
	{
	DEBUGFS_DEL(channel_use, vlan);
	DEBUGFS_DEL(drop_unencrypted, vlan);
	DEBUGFS_DEL(ieee802_1x_pac, vlan);
	}

	static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
	{
	}

	static void del_files(struct ieee80211_sub_if_data *sdata, int type)
	{
	if (!sdata->debugfsdir)
	return;

	switch (type) {
	case IEEE80211_IF_TYPE_STA:
	case IEEE80211_IF_TYPE_IBSS:
	del_sta_files(sdata);
	break;
	case IEEE80211_IF_TYPE_AP:
	del_ap_files(sdata);
	break;
	case IEEE80211_IF_TYPE_WDS:
	del_wds_files(sdata);
	break;
	case IEEE80211_IF_TYPE_MNTR:
	del_monitor_files(sdata);
	break;
	case IEEE80211_IF_TYPE_VLAN:
	del_vlan_files(sdata);
	break;
	default:
	break;
	}
	}

	static int notif_registered;

	void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
	{
	char buf[10+IFNAMSIZ];

	if (!notif_registered)
	return;

	sprintf(buf, "netdev:%s", sdata->dev->name);
	sdata->debugfsdir = debugfs_create_dir(buf,
	sdata->local->hw.wiphy->debugfsdir);
	}

	void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
	{
	del_files(sdata, sdata->type);
	debugfs_remove(sdata->debugfsdir);
	sdata->debugfsdir = NULL;
	}

	void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
	int oldtype)
	{
	del_files(sdata, oldtype);
	add_files(sdata);
	}

	static int netdev_notify(struct notifier_block * nb,
	unsigned long state,
	void *ndev)
	{
	struct net_device *dev = ndev;
	struct dentry *dir;
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	char buf[10+IFNAMSIZ];

	if (state != NETDEV_CHANGENAME)
	return 0;

	if (!dev->ieee80211_ptr \|\| !dev->ieee80211_ptr->wiphy)
	return 0;

	if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
	return 0;

	sprintf(buf, "netdev:%s", dev->name);
	dir = sdata->debugfsdir;
	if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
	printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
	"dir to %s\n", buf);

	return 0;
	}

	static struct notifier_block mac80211_debugfs_netdev_notifier = {
	.notifier_call = netdev_notify,
	};

	void ieee80211_debugfs_netdev_init(void)
	{
	int err;

	err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
	if (err) {
	printk(KERN_ERR
	"mac80211: failed to install netdev notifier,"
	" disabling per-netdev debugfs!\n");
	} else
	notif_registered = 1;
	}

	void ieee80211_debugfs_netdev_exit(void)
	{
	unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
	notif_registered = 0;
	}