net/bridge/br_sysfs_br.c - kernel/msm-4.9 - Gitiles

 /*
  *	Sysfs attributes of bridge ports
  *	Linux ethernet bridge
  *
  *	Authors:
  *	Stephen Hemminger		<shemminger@osdl.org>
  *
  *	This program is free software; you can redistribute it and/or
  *	modify it under the terms of the GNU General Public License
  *	as published by the Free Software Foundation; either version
  *	2 of the License, or (at your option) any later version.
  */

 #include <linux/capability.h>
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
 #include <linux/if_bridge.h>
 #include <linux/rtnetlink.h>
 #include <linux/spinlock.h>
 #include <linux/times.h>

 #include "br_private.h"

 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
 #define to_net_dev(class) container_of(class, struct net_device, class_dev)
 #define to_bridge(cd)	((struct net_bridge *)(to_net_dev(cd)->priv))

 /*
  * Common code for storing bridge parameters.
  */
 static ssize_t store_bridge_parm(struct class_device *cd,
 				 const char *buf, size_t len,
 				 void (*set)(struct net_bridge *, unsigned long))
 {
 	struct net_bridge *br = to_bridge(cd);
 	char *endp;
 	unsigned long val;

 	if (!capable(CAP_NET_ADMIN))
 		return -EPERM;

 	val = simple_strtoul(buf, &endp, 0);
 	if (endp == buf)
 		return -EINVAL;

 	spin_lock_bh(&br->lock);
 	(*set)(br, val);
 	spin_unlock_bh(&br->lock);
 	return len;
 }


 static ssize_t show_forward_delay(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
 }

 static void set_forward_delay(struct net_bridge *br, unsigned long val)
 {
 	unsigned long delay = clock_t_to_jiffies(val);
 	br->forward_delay = delay;
 	if (br_is_root_bridge(br))
 		br->bridge_forward_delay = delay;
 }

 static ssize_t store_forward_delay(struct class_device *cd, const char *buf,
 				   size_t len)
 {
 	return store_bridge_parm(cd, buf, len, set_forward_delay);
 }
 static CLASS_DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
 			 show_forward_delay, store_forward_delay);

 static ssize_t show_hello_time(struct class_device *cd, char *buf)
 {
 	return sprintf(buf, "%lu\n",
 		       jiffies_to_clock_t(to_bridge(cd)->hello_time));
 }

 static void set_hello_time(struct net_bridge *br, unsigned long val)
 {
 	unsigned long t = clock_t_to_jiffies(val);
 	br->hello_time = t;
 	if (br_is_root_bridge(br))
 		br->bridge_hello_time = t;
 }

 static ssize_t store_hello_time(struct class_device *cd, const char *buf,
 				size_t len)
 {
 	return store_bridge_parm(cd, buf, len, set_hello_time);
 }

 static CLASS_DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
 			 store_hello_time);

 static ssize_t show_max_age(struct class_device *cd, char *buf)
 {
 	return sprintf(buf, "%lu\n",
 		       jiffies_to_clock_t(to_bridge(cd)->max_age));
 }

 static void set_max_age(struct net_bridge *br, unsigned long val)
 {
 	unsigned long t = clock_t_to_jiffies(val);
 	br->max_age = t;
 	if (br_is_root_bridge(br))
 		br->bridge_max_age = t;
 }

 static ssize_t store_max_age(struct class_device *cd, const char *buf,
 				size_t len)
 {
 	return store_bridge_parm(cd, buf, len, set_max_age);
 }

 static CLASS_DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age,
 			 store_max_age);

 static ssize_t show_ageing_time(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
 }

 static void set_ageing_time(struct net_bridge *br, unsigned long val)
 {
 	br->ageing_time = clock_t_to_jiffies(val);
 }

 static ssize_t store_ageing_time(struct class_device *cd, const char *buf,
 				 size_t len)
 {
 	return store_bridge_parm(cd, buf, len, set_ageing_time);
 }

 static CLASS_DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
 			 store_ageing_time);
 static ssize_t show_stp_state(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%d\n", br->stp_enabled);
 }

 static void set_stp_state(struct net_bridge *br, unsigned long val)
 {
 	br->stp_enabled = val;
 }

 static ssize_t store_stp_state(struct class_device *cd,
 			       const char *buf, size_t len)
 {
 	return store_bridge_parm(cd, buf, len, set_stp_state);
 }

 static CLASS_DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
 			 store_stp_state);

 static ssize_t show_priority(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%d\n",
 		       (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
 }

 static void set_priority(struct net_bridge *br, unsigned long val)
 {
 	br_stp_set_bridge_priority(br, (u16) val);
 }

 static ssize_t store_priority(struct class_device *cd,
 			       const char *buf, size_t len)
 {
 	return store_bridge_parm(cd, buf, len, set_priority);
 }
 static CLASS_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority,
 			 store_priority);

 static ssize_t show_root_id(struct class_device *cd, char *buf)
 {
 	return br_show_bridge_id(buf, &to_bridge(cd)->designated_root);
 }
 static CLASS_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);

 static ssize_t show_bridge_id(struct class_device *cd, char *buf)
 {
 	return br_show_bridge_id(buf, &to_bridge(cd)->bridge_id);
 }
 static CLASS_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);

 static ssize_t show_root_port(struct class_device *cd, char *buf)
 {
 	return sprintf(buf, "%d\n", to_bridge(cd)->root_port);
 }
 static CLASS_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);

 static ssize_t show_root_path_cost(struct class_device *cd, char *buf)
 {
 	return sprintf(buf, "%d\n", to_bridge(cd)->root_path_cost);
 }
 static CLASS_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);

 static ssize_t show_topology_change(struct class_device *cd, char *buf)
 {
 	return sprintf(buf, "%d\n", to_bridge(cd)->topology_change);
 }
 static CLASS_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);

 static ssize_t show_topology_change_detected(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%d\n", br->topology_change_detected);
 }
 static CLASS_DEVICE_ATTR(topology_change_detected, S_IRUGO, show_topology_change_detected, NULL);

 static ssize_t show_hello_timer(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
 }
 static CLASS_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);

 static ssize_t show_tcn_timer(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
 }
 static CLASS_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);

 static ssize_t show_topology_change_timer(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
 }
 static CLASS_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer, NULL);

 static ssize_t show_gc_timer(struct class_device *cd, char *buf)
 {
 	struct net_bridge *br = to_bridge(cd);
 	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
 }
 static CLASS_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);

 static struct attribute *bridge_attrs[] = {
 	&class_device_attr_forward_delay.attr,
 	&class_device_attr_hello_time.attr,
 	&class_device_attr_max_age.attr,
 	&class_device_attr_ageing_time.attr,
 	&class_device_attr_stp_state.attr,
 	&class_device_attr_priority.attr,
 	&class_device_attr_bridge_id.attr,
 	&class_device_attr_root_id.attr,
 	&class_device_attr_root_path_cost.attr,
 	&class_device_attr_root_port.attr,
 	&class_device_attr_topology_change.attr,
 	&class_device_attr_topology_change_detected.attr,
 	&class_device_attr_hello_timer.attr,
 	&class_device_attr_tcn_timer.attr,
 	&class_device_attr_topology_change_timer.attr,
 	&class_device_attr_gc_timer.attr,
 	NULL
 };

 static struct attribute_group bridge_group = {
 	.name = SYSFS_BRIDGE_ATTR,
 	.attrs = bridge_attrs,
 };

 /*
  * Export the forwarding information table as a binary file
  * The records are struct __fdb_entry.
  *
  * Returns the number of bytes read.
  */
 static ssize_t brforward_read(struct kobject *kobj, char *buf,
 			   loff_t off, size_t count)
 {
 	struct class_device *cdev = to_class_dev(kobj);
 	struct net_bridge *br = to_bridge(cdev);
 	int n;

 	/* must read whole records */
 	if (off % sizeof(struct __fdb_entry) != 0)
 		return -EINVAL;

 	n =  br_fdb_fillbuf(br, buf,
 			    count / sizeof(struct __fdb_entry),
 			    off / sizeof(struct __fdb_entry));

 	if (n > 0)
 		n *= sizeof(struct __fdb_entry);

 	return n;
 }

 static struct bin_attribute bridge_forward = {
 	.attr = { .name = SYSFS_BRIDGE_FDB,
 		  .mode = S_IRUGO,
 		  .owner = THIS_MODULE, },
 	.read = brforward_read,
 };

 /*
  * Add entries in sysfs onto the existing network class device
  * for the bridge.
  *   Adds a attribute group "bridge" containing tuning parameters.
  *   Binary attribute containing the forward table
  *   Sub directory to hold links to interfaces.
  *
  * Note: the ifobj exists only to be a subdirectory
  *   to hold links.  The ifobj exists in same data structure
  *   as it's parent the bridge so reference counting works.
  */
 int br_sysfs_addbr(struct net_device *dev)
 {
 	struct kobject *brobj = &dev->class_dev.kobj;
 	struct net_bridge *br = netdev_priv(dev);
 	int err;

 	err = sysfs_create_group(brobj, &bridge_group);
 	if (err) {
 		pr_info("%s: can't create group %s/%s\n",
 			__FUNCTION__, dev->name, bridge_group.name);
 		goto out1;
 	}

 	err = sysfs_create_bin_file(brobj, &bridge_forward);
 	if (err) {
 		pr_info("%s: can't create attribue file %s/%s\n",
 			__FUNCTION__, dev->name, bridge_forward.attr.name);
 		goto out2;
 	}


 	kobject_set_name(&br->ifobj, SYSFS_BRIDGE_PORT_SUBDIR);
 	br->ifobj.ktype = NULL;
 	br->ifobj.kset = NULL;
 	br->ifobj.parent = brobj;

 	err = kobject_register(&br->ifobj);
 	if (err) {
 		pr_info("%s: can't add kobject (directory) %s/%s\n",
 			__FUNCTION__, dev->name, br->ifobj.name);
 		goto out3;
 	}
 	return 0;
  out3:
 	sysfs_remove_bin_file(&dev->class_dev.kobj, &bridge_forward);
  out2:
 	sysfs_remove_group(&dev->class_dev.kobj, &bridge_group);
  out1:
 	return err;

 }

 void br_sysfs_delbr(struct net_device *dev)
 {
 	struct kobject *kobj = &dev->class_dev.kobj;
 	struct net_bridge *br = netdev_priv(dev);

 	kobject_unregister(&br->ifobj);
 	sysfs_remove_bin_file(kobj, &bridge_forward);
 	sysfs_remove_group(kobj, &bridge_group);
 }
	/*
	* Sysfs attributes of bridge ports
	* Linux ethernet bridge
	*
	* Authors:
	* Stephen Hemminger <shemminger@osdl.org>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*/

	#include <linux/capability.h>
	#include <linux/kernel.h>
	#include <linux/netdevice.h>
	#include <linux/if_bridge.h>
	#include <linux/rtnetlink.h>
	#include <linux/spinlock.h>
	#include <linux/times.h>

	#include "br_private.h"

	#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
	#define to_net_dev(class) container_of(class, struct net_device, class_dev)
	#define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv))

	/*
	* Common code for storing bridge parameters.
	*/
	static ssize_t store_bridge_parm(struct class_device *cd,
	const char *buf, size_t len,
	void (set)(struct net_bridge , unsigned long))
	{
	struct net_bridge *br = to_bridge(cd);
	char *endp;
	unsigned long val;

	if (!capable(CAP_NET_ADMIN))
	return -EPERM;

	val = simple_strtoul(buf, &endp, 0);
	if (endp == buf)
	return -EINVAL;

	spin_lock_bh(&br->lock);
	(*set)(br, val);
	spin_unlock_bh(&br->lock);
	return len;
	}


	static ssize_t show_forward_delay(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
	}

	static void set_forward_delay(struct net_bridge *br, unsigned long val)
	{
	unsigned long delay = clock_t_to_jiffies(val);
	br->forward_delay = delay;
	if (br_is_root_bridge(br))
	br->bridge_forward_delay = delay;
	}

	static ssize_t store_forward_delay(struct class_device cd, const char buf,
	size_t len)
	{
	return store_bridge_parm(cd, buf, len, set_forward_delay);
	}
	static CLASS_DEVICE_ATTR(forward_delay, S_IRUGO \| S_IWUSR,
	show_forward_delay, store_forward_delay);

	static ssize_t show_hello_time(struct class_device cd, char buf)
	{
	return sprintf(buf, "%lu\n",
	jiffies_to_clock_t(to_bridge(cd)->hello_time));
	}

	static void set_hello_time(struct net_bridge *br, unsigned long val)
	{
	unsigned long t = clock_t_to_jiffies(val);
	br->hello_time = t;
	if (br_is_root_bridge(br))
	br->bridge_hello_time = t;
	}

	static ssize_t store_hello_time(struct class_device cd, const char buf,
	size_t len)
	{
	return store_bridge_parm(cd, buf, len, set_hello_time);
	}

	static CLASS_DEVICE_ATTR(hello_time, S_IRUGO \| S_IWUSR, show_hello_time,
	store_hello_time);

	static ssize_t show_max_age(struct class_device cd, char buf)
	{
	return sprintf(buf, "%lu\n",
	jiffies_to_clock_t(to_bridge(cd)->max_age));
	}

	static void set_max_age(struct net_bridge *br, unsigned long val)
	{
	unsigned long t = clock_t_to_jiffies(val);
	br->max_age = t;
	if (br_is_root_bridge(br))
	br->bridge_max_age = t;
	}

	static ssize_t store_max_age(struct class_device cd, const char buf,
	size_t len)
	{
	return store_bridge_parm(cd, buf, len, set_max_age);
	}

	static CLASS_DEVICE_ATTR(max_age, S_IRUGO \| S_IWUSR, show_max_age,
	store_max_age);

	static ssize_t show_ageing_time(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
	}

	static void set_ageing_time(struct net_bridge *br, unsigned long val)
	{
	br->ageing_time = clock_t_to_jiffies(val);
	}

	static ssize_t store_ageing_time(struct class_device cd, const char buf,
	size_t len)
	{
	return store_bridge_parm(cd, buf, len, set_ageing_time);
	}

	static CLASS_DEVICE_ATTR(ageing_time, S_IRUGO \| S_IWUSR, show_ageing_time,
	store_ageing_time);
	static ssize_t show_stp_state(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%d\n", br->stp_enabled);
	}

	static void set_stp_state(struct net_bridge *br, unsigned long val)
	{
	br->stp_enabled = val;
	}

	static ssize_t store_stp_state(struct class_device *cd,
	const char *buf, size_t len)
	{
	return store_bridge_parm(cd, buf, len, set_stp_state);
	}

	static CLASS_DEVICE_ATTR(stp_state, S_IRUGO \| S_IWUSR, show_stp_state,
	store_stp_state);

	static ssize_t show_priority(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%d\n",
	(br->bridge_id.prio[0] << 8) \| br->bridge_id.prio[1]);
	}

	static void set_priority(struct net_bridge *br, unsigned long val)
	{
	br_stp_set_bridge_priority(br, (u16) val);
	}

	static ssize_t store_priority(struct class_device *cd,
	const char *buf, size_t len)
	{
	return store_bridge_parm(cd, buf, len, set_priority);
	}
	static CLASS_DEVICE_ATTR(priority, S_IRUGO \| S_IWUSR, show_priority,
	store_priority);

	static ssize_t show_root_id(struct class_device cd, char buf)
	{
	return br_show_bridge_id(buf, &to_bridge(cd)->designated_root);
	}
	static CLASS_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);

	static ssize_t show_bridge_id(struct class_device cd, char buf)
	{
	return br_show_bridge_id(buf, &to_bridge(cd)->bridge_id);
	}
	static CLASS_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);

	static ssize_t show_root_port(struct class_device cd, char buf)
	{
	return sprintf(buf, "%d\n", to_bridge(cd)->root_port);
	}
	static CLASS_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);

	static ssize_t show_root_path_cost(struct class_device cd, char buf)
	{
	return sprintf(buf, "%d\n", to_bridge(cd)->root_path_cost);
	}
	static CLASS_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);

	static ssize_t show_topology_change(struct class_device cd, char buf)
	{
	return sprintf(buf, "%d\n", to_bridge(cd)->topology_change);
	}
	static CLASS_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);

	static ssize_t show_topology_change_detected(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%d\n", br->topology_change_detected);
	}
	static CLASS_DEVICE_ATTR(topology_change_detected, S_IRUGO, show_topology_change_detected, NULL);

	static ssize_t show_hello_timer(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
	}
	static CLASS_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);

	static ssize_t show_tcn_timer(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
	}
	static CLASS_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);

	static ssize_t show_topology_change_timer(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
	}
	static CLASS_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer, NULL);

	static ssize_t show_gc_timer(struct class_device cd, char buf)
	{
	struct net_bridge *br = to_bridge(cd);
	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
	}
	static CLASS_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);

	static struct attribute *bridge_attrs[] = {
	&class_device_attr_forward_delay.attr,
	&class_device_attr_hello_time.attr,
	&class_device_attr_max_age.attr,
	&class_device_attr_ageing_time.attr,
	&class_device_attr_stp_state.attr,
	&class_device_attr_priority.attr,
	&class_device_attr_bridge_id.attr,
	&class_device_attr_root_id.attr,
	&class_device_attr_root_path_cost.attr,
	&class_device_attr_root_port.attr,
	&class_device_attr_topology_change.attr,
	&class_device_attr_topology_change_detected.attr,
	&class_device_attr_hello_timer.attr,
	&class_device_attr_tcn_timer.attr,
	&class_device_attr_topology_change_timer.attr,
	&class_device_attr_gc_timer.attr,
	NULL
	};

	static struct attribute_group bridge_group = {
	.name = SYSFS_BRIDGE_ATTR,
	.attrs = bridge_attrs,
	};

	/*
	* Export the forwarding information table as a binary file
	* The records are struct __fdb_entry.
	*
	* Returns the number of bytes read.
	*/
	static ssize_t brforward_read(struct kobject kobj, char buf,
	loff_t off, size_t count)
	{
	struct class_device *cdev = to_class_dev(kobj);
	struct net_bridge *br = to_bridge(cdev);
	int n;

	/* must read whole records */
	if (off % sizeof(struct __fdb_entry) != 0)
	return -EINVAL;

	n = br_fdb_fillbuf(br, buf,
	count / sizeof(struct __fdb_entry),
	off / sizeof(struct __fdb_entry));

	if (n > 0)
	n *= sizeof(struct __fdb_entry);

	return n;
	}

	static struct bin_attribute bridge_forward = {
	.attr = { .name = SYSFS_BRIDGE_FDB,
	.mode = S_IRUGO,
	.owner = THIS_MODULE, },
	.read = brforward_read,
	};

	/*
	* Add entries in sysfs onto the existing network class device
	* for the bridge.
	* Adds a attribute group "bridge" containing tuning parameters.
	* Binary attribute containing the forward table
	* Sub directory to hold links to interfaces.
	*
	* Note: the ifobj exists only to be a subdirectory
	* to hold links. The ifobj exists in same data structure
	* as it's parent the bridge so reference counting works.
	*/
	int br_sysfs_addbr(struct net_device *dev)
	{
	struct kobject *brobj = &dev->class_dev.kobj;
	struct net_bridge *br = netdev_priv(dev);
	int err;

	err = sysfs_create_group(brobj, &bridge_group);
	if (err) {
	pr_info("%s: can't create group %s/%s\n",
	__FUNCTION__, dev->name, bridge_group.name);
	goto out1;
	}

	err = sysfs_create_bin_file(brobj, &bridge_forward);
	if (err) {
	pr_info("%s: can't create attribue file %s/%s\n",
	__FUNCTION__, dev->name, bridge_forward.attr.name);
	goto out2;
	}


	kobject_set_name(&br->ifobj, SYSFS_BRIDGE_PORT_SUBDIR);
	br->ifobj.ktype = NULL;
	br->ifobj.kset = NULL;
	br->ifobj.parent = brobj;

	err = kobject_register(&br->ifobj);
	if (err) {
	pr_info("%s: can't add kobject (directory) %s/%s\n",
	__FUNCTION__, dev->name, br->ifobj.name);
	goto out3;
	}
	return 0;
	out3:
	sysfs_remove_bin_file(&dev->class_dev.kobj, &bridge_forward);
	out2:
	sysfs_remove_group(&dev->class_dev.kobj, &bridge_group);
	out1:
	return err;

	}

	void br_sysfs_delbr(struct net_device *dev)
	{
	struct kobject *kobj = &dev->class_dev.kobj;
	struct net_bridge *br = netdev_priv(dev);

	kobject_unregister(&br->ifobj);
	sysfs_remove_bin_file(kobj, &bridge_forward);
	sysfs_remove_group(kobj, &bridge_group);
	}