[linux-block.git] / net / bridge / br_sysfs_br.c

/*
 *	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_dev(obj)	container_of(obj, struct device, kobj)
#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 device *d,
				 const char *buf, size_t len,
				 int (*set)(struct net_bridge *, unsigned long))
{
	struct net_bridge *br = to_bridge(d);
	char *endp;
	unsigned long val;
	int err;

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

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

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


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

static int 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;
	return 0;
}

static ssize_t store_forward_delay(struct device *d,
				   struct device_attribute *attr,
				   const char *buf, size_t len)
{
	return store_bridge_parm(d, buf, len, set_forward_delay);
}
static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
		   show_forward_delay, store_forward_delay);

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

static int set_hello_time(struct net_bridge *br, unsigned long val)
{
	unsigned long t = clock_t_to_jiffies(val);

	if (t < HZ)
		return -EINVAL;

	br->hello_time = t;
	if (br_is_root_bridge(br))
		br->bridge_hello_time = t;
	return 0;
}

static ssize_t store_hello_time(struct device *d,
				struct device_attribute *attr, const char *buf,
				size_t len)
{
	return store_bridge_parm(d, buf, len, set_hello_time);
}
static DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
		   store_hello_time);

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

static int 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;
	return 0;
}

static ssize_t store_max_age(struct device *d, struct device_attribute *attr,
			     const char *buf, size_t len)
{
	return store_bridge_parm(d, buf, len, set_max_age);
}
static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);

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

static int set_ageing_time(struct net_bridge *br, unsigned long val)
{
	br->ageing_time = clock_t_to_jiffies(val);
	return 0;
}

static ssize_t store_ageing_time(struct device *d,
				 struct device_attribute *attr,
				 const char *buf, size_t len)
{
	return store_bridge_parm(d, buf, len, set_ageing_time);
}
static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
		   store_ageing_time);

static ssize_t show_stp_state(struct device *d,
			      struct device_attribute *attr, char *buf)
{
	struct net_bridge *br = to_bridge(d);
	return sprintf(buf, "%d\n", br->stp_enabled);
}


static ssize_t store_stp_state(struct device *d,
			       struct device_attribute *attr, const char *buf,
			       size_t len)
{
	struct net_bridge *br = to_bridge(d);
	char *endp;
	unsigned long val;

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

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

	rtnl_lock();
	br_stp_set_enabled(br, val);
	rtnl_unlock();

	return len;
}
static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
		   store_stp_state);

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

static int set_priority(struct net_bridge *br, unsigned long val)
{
	br_stp_set_bridge_priority(br, (u16) val);
	return 0;
}

static ssize_t store_priority(struct device *d, struct device_attribute *attr,
			       const char *buf, size_t len)
{
	return store_bridge_parm(d, buf, len, set_priority);
}
static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);

static ssize_t show_root_id(struct device *d, struct device_attribute *attr,
			    char *buf)
{
	return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
}
static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);

static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr,
			      char *buf)
{
	return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
}
static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);

static ssize_t show_root_port(struct device *d, struct device_attribute *attr,
			      char *buf)
{
	return sprintf(buf, "%d\n", to_bridge(d)->root_port);
}
static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);

static ssize_t show_root_path_cost(struct device *d,
				   struct device_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
}
static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);

static ssize_t show_topology_change(struct device *d,
				    struct device_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
}
static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);

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

static ssize_t show_hello_timer(struct device *d,
				struct device_attribute *attr, char *buf)
{
	struct net_bridge *br = to_bridge(d);
	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
}
static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);

static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr,
			      char *buf)
{
	struct net_bridge *br = to_bridge(d);
	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
}
static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);

static ssize_t show_topology_change_timer(struct device *d,
					  struct device_attribute *attr,
					  char *buf)
{
	struct net_bridge *br = to_bridge(d);
	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
}
static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
		   NULL);

static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr,
			     char *buf)
{
	struct net_bridge *br = to_bridge(d);
	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
}
static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);

static ssize_t show_group_addr(struct device *d,
			       struct device_attribute *attr, char *buf)
{
	struct net_bridge *br = to_bridge(d);
	return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
		       br->group_addr[0], br->group_addr[1],
		       br->group_addr[2], br->group_addr[3],
		       br->group_addr[4], br->group_addr[5]);
}

static ssize_t store_group_addr(struct device *d,
				struct device_attribute *attr,
				const char *buf, size_t len)
{
	struct net_bridge *br = to_bridge(d);
	unsigned new_addr[6];
	int i;

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

	if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
		   &new_addr[0], &new_addr[1], &new_addr[2],
		   &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
		return -EINVAL;

	/* Must be 01:80:c2:00:00:0X */
	for (i = 0; i < 5; i++)
		if (new_addr[i] != br_group_address[i])
			return -EINVAL;

	if (new_addr[5] & ~0xf)
		return -EINVAL;

	if (new_addr[5] == 1 	/* 802.3x Pause address */
	    || new_addr[5] == 2 /* 802.3ad Slow protocols */
	    || new_addr[5] == 3) /* 802.1X PAE address */
		return -EINVAL;

	spin_lock_bh(&br->lock);
	for (i = 0; i < 6; i++)
		br->group_addr[i] = new_addr[i];
	spin_unlock_bh(&br->lock);
	return len;
}

static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
		   show_group_addr, store_group_addr);

static ssize_t store_flush(struct device *d,
			   struct device_attribute *attr,
			   const char *buf, size_t len)
{
	struct net_bridge *br = to_bridge(d);

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

	br_fdb_flush(br);
	return len;
}
static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);

static struct attribute *bridge_attrs[] = {
	&dev_attr_forward_delay.attr,
	&dev_attr_hello_time.attr,
	&dev_attr_max_age.attr,
	&dev_attr_ageing_time.attr,
	&dev_attr_stp_state.attr,
	&dev_attr_priority.attr,
	&dev_attr_bridge_id.attr,
	&dev_attr_root_id.attr,
	&dev_attr_root_path_cost.attr,
	&dev_attr_root_port.attr,
	&dev_attr_topology_change.attr,
	&dev_attr_topology_change_detected.attr,
	&dev_attr_hello_timer.attr,
	&dev_attr_tcn_timer.attr,
	&dev_attr_topology_change_timer.attr,
	&dev_attr_gc_timer.attr,
	&dev_attr_group_addr.attr,
	&dev_attr_flush.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,
			      struct bin_attribute *bin_attr,
			      char *buf, loff_t off, size_t count)
{
	struct device *dev = to_dev(kobj);
	struct net_bridge *br = to_bridge(dev);
	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, },
	.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->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",
			__func__, dev->name, bridge_group.name);
		goto out1;
	}

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

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

}

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

	kobject_put(br->ifobj);
	sysfs_remove_bin_file(kobj, &bridge_forward);
	sysfs_remove_group(kobj, &bridge_group);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Sysfs attributes of bridge ports
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Stephen Hemminger <shemminger@osdl.org>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; either version
	11	* 2 of the License, or (at your option) any later version.
	12	*/
	13
4fc268d2	14	#include <linux/capability.h>
1da177e4 LT	15	#include <linux/kernel.h>
	16	#include <linux/netdevice.h>
	17	#include <linux/if_bridge.h>
	18	#include <linux/rtnetlink.h>
	19	#include <linux/spinlock.h>
	20	#include <linux/times.h>
	21
	22	#include "br_private.h"
	23
43cb76d9	24	#define to_dev(obj) container_of(obj, struct device, kobj)
1da177e4 LT	25	#define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv))
	26
	27	/*
	28	* Common code for storing bridge parameters.
	29	*/
43cb76d9	30	static ssize_t store_bridge_parm(struct device *d,
1da177e4	31	const char *buf, size_t len,
8d4698f7	32	int (set)(struct net_bridge , unsigned long))
1da177e4	33	{
43cb76d9	34	struct net_bridge *br = to_bridge(d);
1da177e4 LT	35	char *endp;
1da177e4 LT	36	unsigned long val;
8d4698f7	37	int err;
1da177e4 LT	38
	39	if (!capable(CAP_NET_ADMIN))
	40	return -EPERM;
	41
	42	val = simple_strtoul(buf, &endp, 0);
	43	if (endp == buf)
	44	return -EINVAL;
	45
	46	spin_lock_bh(&br->lock);
8d4698f7	47	err = (*set)(br, val);
1da177e4	48	spin_unlock_bh(&br->lock);
8d4698f7	49	return err ? err : len;
1da177e4 LT	50	}
	51
	52
43cb76d9 GKH	53	static ssize_t show_forward_delay(struct device *d,
43cb76d9 GKH	54	struct device_attribute attr, char buf)
1da177e4	55	{
43cb76d9	56	struct net_bridge *br = to_bridge(d);
1da177e4 LT	57	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
	58	}
	59
8d4698f7	60	static int set_forward_delay(struct net_bridge *br, unsigned long val)
1da177e4 LT	61	{
	62	unsigned long delay = clock_t_to_jiffies(val);
	63	br->forward_delay = delay;
	64	if (br_is_root_bridge(br))
	65	br->bridge_forward_delay = delay;
8d4698f7	66	return 0;
1da177e4 LT	67	}
1da177e4 LT	68
43cb76d9 GKH	69	static ssize_t store_forward_delay(struct device *d,
	70	struct device_attribute *attr,
	71	const char *buf, size_t len)
1da177e4	72	{
43cb76d9	73	return store_bridge_parm(d, buf, len, set_forward_delay);
1da177e4	74	}
43cb76d9 GKH	75	static DEVICE_ATTR(forward_delay, S_IRUGO \| S_IWUSR,
43cb76d9 GKH	76	show_forward_delay, store_forward_delay);
1da177e4	77
43cb76d9 GKH	78	static ssize_t show_hello_time(struct device d, struct device_attribute attr,
43cb76d9 GKH	79	char *buf)
1da177e4 LT	80	{
1da177e4 LT	81	return sprintf(buf, "%lu\n",
43cb76d9	82	jiffies_to_clock_t(to_bridge(d)->hello_time));
1da177e4 LT	83	}
1da177e4 LT	84
8d4698f7	85	static int set_hello_time(struct net_bridge *br, unsigned long val)
1da177e4 LT	86	{
1da177e4 LT	87	unsigned long t = clock_t_to_jiffies(val);
8d4698f7 SH	88
	89	if (t < HZ)
	90	return -EINVAL;
	91
1da177e4 LT	92	br->hello_time = t;
	93	if (br_is_root_bridge(br))
	94	br->bridge_hello_time = t;
8d4698f7	95	return 0;
1da177e4 LT	96	}
1da177e4 LT	97
43cb76d9 GKH	98	static ssize_t store_hello_time(struct device *d,
43cb76d9 GKH	99	struct device_attribute attr, const char buf,
1da177e4 LT	100	size_t len)
1da177e4 LT	101	{
43cb76d9	102	return store_bridge_parm(d, buf, len, set_hello_time);
1da177e4	103	}
43cb76d9 GKH	104	static DEVICE_ATTR(hello_time, S_IRUGO \| S_IWUSR, show_hello_time,
43cb76d9 GKH	105	store_hello_time);
1da177e4	106
43cb76d9 GKH	107	static ssize_t show_max_age(struct device d, struct device_attribute attr,
43cb76d9 GKH	108	char *buf)
1da177e4 LT	109	{
1da177e4 LT	110	return sprintf(buf, "%lu\n",
43cb76d9	111	jiffies_to_clock_t(to_bridge(d)->max_age));
1da177e4 LT	112	}
1da177e4 LT	113
8d4698f7	114	static int set_max_age(struct net_bridge *br, unsigned long val)
1da177e4 LT	115	{
	116	unsigned long t = clock_t_to_jiffies(val);
	117	br->max_age = t;
	118	if (br_is_root_bridge(br))
	119	br->bridge_max_age = t;
8d4698f7	120	return 0;
1da177e4 LT	121	}
1da177e4 LT	122
43cb76d9 GKH	123	static ssize_t store_max_age(struct device d, struct device_attribute attr,
43cb76d9 GKH	124	const char *buf, size_t len)
1da177e4	125	{
43cb76d9	126	return store_bridge_parm(d, buf, len, set_max_age);
1da177e4	127	}
43cb76d9	128	static DEVICE_ATTR(max_age, S_IRUGO \| S_IWUSR, show_max_age, store_max_age);
1da177e4	129
43cb76d9 GKH	130	static ssize_t show_ageing_time(struct device *d,
43cb76d9 GKH	131	struct device_attribute attr, char buf)
1da177e4	132	{
43cb76d9	133	struct net_bridge *br = to_bridge(d);
1da177e4 LT	134	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
	135	}
	136
8d4698f7	137	static int set_ageing_time(struct net_bridge *br, unsigned long val)
1da177e4 LT	138	{
1da177e4 LT	139	br->ageing_time = clock_t_to_jiffies(val);
8d4698f7	140	return 0;
1da177e4 LT	141	}
1da177e4 LT	142
43cb76d9 GKH	143	static ssize_t store_ageing_time(struct device *d,
	144	struct device_attribute *attr,
	145	const char *buf, size_t len)
1da177e4	146	{
43cb76d9	147	return store_bridge_parm(d, buf, len, set_ageing_time);
1da177e4	148	}
43cb76d9 GKH	149	static DEVICE_ATTR(ageing_time, S_IRUGO \| S_IWUSR, show_ageing_time,
43cb76d9 GKH	150	store_ageing_time);
1da177e4	151
43cb76d9 GKH	152	static ssize_t show_stp_state(struct device *d,
43cb76d9 GKH	153	struct device_attribute attr, char buf)
1da177e4	154	{
43cb76d9	155	struct net_bridge *br = to_bridge(d);
1da177e4 LT	156	return sprintf(buf, "%d\n", br->stp_enabled);
	157	}
	158
1da177e4	159
43cb76d9 GKH	160	static ssize_t store_stp_state(struct device *d,
	161	struct device_attribute attr, const char buf,
	162	size_t len)
1da177e4	163	{
17120889 SH	164	struct net_bridge *br = to_bridge(d);
	165	char *endp;
	166	unsigned long val;
	167
	168	if (!capable(CAP_NET_ADMIN))
	169	return -EPERM;
	170
	171	val = simple_strtoul(buf, &endp, 0);
	172	if (endp == buf)
	173	return -EINVAL;
	174
	175	rtnl_lock();
	176	br_stp_set_enabled(br, val);
	177	rtnl_unlock();
	178
35b426c3	179	return len;
1da177e4	180	}
43cb76d9 GKH	181	static DEVICE_ATTR(stp_state, S_IRUGO \| S_IWUSR, show_stp_state,
43cb76d9 GKH	182	store_stp_state);
1da177e4	183
43cb76d9 GKH	184	static ssize_t show_priority(struct device d, struct device_attribute attr,
43cb76d9 GKH	185	char *buf)
1da177e4	186	{
43cb76d9	187	struct net_bridge *br = to_bridge(d);
1da177e4 LT	188	return sprintf(buf, "%d\n",
	189	(br->bridge_id.prio[0] << 8) \| br->bridge_id.prio[1]);
	190	}
	191
8d4698f7	192	static int set_priority(struct net_bridge *br, unsigned long val)
1da177e4 LT	193	{
1da177e4 LT	194	br_stp_set_bridge_priority(br, (u16) val);
8d4698f7	195	return 0;
1da177e4 LT	196	}
1da177e4 LT	197
43cb76d9	198	static ssize_t store_priority(struct device d, struct device_attribute attr,
1da177e4 LT	199	const char *buf, size_t len)
1da177e4 LT	200	{
43cb76d9	201	return store_bridge_parm(d, buf, len, set_priority);
1da177e4	202	}
43cb76d9	203	static DEVICE_ATTR(priority, S_IRUGO \| S_IWUSR, show_priority, store_priority);
1da177e4	204
43cb76d9 GKH	205	static ssize_t show_root_id(struct device d, struct device_attribute attr,
43cb76d9 GKH	206	char *buf)
1da177e4	207	{
43cb76d9	208	return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
1da177e4	209	}
43cb76d9	210	static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
1da177e4	211
43cb76d9 GKH	212	static ssize_t show_bridge_id(struct device d, struct device_attribute attr,
43cb76d9 GKH	213	char *buf)
1da177e4	214	{
43cb76d9	215	return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
1da177e4	216	}
43cb76d9	217	static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
1da177e4	218
43cb76d9 GKH	219	static ssize_t show_root_port(struct device d, struct device_attribute attr,
43cb76d9 GKH	220	char *buf)
1da177e4	221	{
43cb76d9	222	return sprintf(buf, "%d\n", to_bridge(d)->root_port);
1da177e4	223	}
43cb76d9	224	static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
1da177e4	225
43cb76d9 GKH	226	static ssize_t show_root_path_cost(struct device *d,
43cb76d9 GKH	227	struct device_attribute attr, char buf)
1da177e4	228	{
43cb76d9	229	return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
1da177e4	230	}
43cb76d9	231	static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
1da177e4	232
43cb76d9 GKH	233	static ssize_t show_topology_change(struct device *d,
43cb76d9 GKH	234	struct device_attribute attr, char buf)
1da177e4	235	{
43cb76d9	236	return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
1da177e4	237	}
43cb76d9	238	static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
1da177e4	239
43cb76d9 GKH	240	static ssize_t show_topology_change_detected(struct device *d,
	241	struct device_attribute *attr,
	242	char *buf)
1da177e4	243	{
43cb76d9	244	struct net_bridge *br = to_bridge(d);
1da177e4 LT	245	return sprintf(buf, "%d\n", br->topology_change_detected);
1da177e4 LT	246	}
43cb76d9 GKH	247	static DEVICE_ATTR(topology_change_detected, S_IRUGO,
43cb76d9 GKH	248	show_topology_change_detected, NULL);
1da177e4	249
43cb76d9 GKH	250	static ssize_t show_hello_timer(struct device *d,
43cb76d9 GKH	251	struct device_attribute attr, char buf)
1da177e4	252	{
43cb76d9	253	struct net_bridge *br = to_bridge(d);
1da177e4 LT	254	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
1da177e4 LT	255	}
43cb76d9	256	static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
1da177e4	257
43cb76d9 GKH	258	static ssize_t show_tcn_timer(struct device d, struct device_attribute attr,
43cb76d9 GKH	259	char *buf)
1da177e4	260	{
43cb76d9	261	struct net_bridge *br = to_bridge(d);
1da177e4 LT	262	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
1da177e4 LT	263	}
43cb76d9	264	static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
1da177e4	265
43cb76d9 GKH	266	static ssize_t show_topology_change_timer(struct device *d,
	267	struct device_attribute *attr,
	268	char *buf)
1da177e4	269	{
43cb76d9	270	struct net_bridge *br = to_bridge(d);
1da177e4 LT	271	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
1da177e4 LT	272	}
43cb76d9 GKH	273	static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
43cb76d9 GKH	274	NULL);
1da177e4	275
43cb76d9 GKH	276	static ssize_t show_gc_timer(struct device d, struct device_attribute attr,
43cb76d9 GKH	277	char *buf)
1da177e4	278	{
43cb76d9	279	struct net_bridge *br = to_bridge(d);
1da177e4 LT	280	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
1da177e4 LT	281	}
43cb76d9	282	static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
1da177e4	283
43cb76d9 GKH	284	static ssize_t show_group_addr(struct device *d,
43cb76d9 GKH	285	struct device_attribute attr, char buf)
fda93d92	286	{
43cb76d9	287	struct net_bridge *br = to_bridge(d);
fda93d92 SH	288	return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
	289	br->group_addr[0], br->group_addr[1],
	290	br->group_addr[2], br->group_addr[3],
	291	br->group_addr[4], br->group_addr[5]);
	292	}
	293
43cb76d9 GKH	294	static ssize_t store_group_addr(struct device *d,
	295	struct device_attribute *attr,
	296	const char *buf, size_t len)
fda93d92	297	{
43cb76d9	298	struct net_bridge *br = to_bridge(d);
fda93d92 SH	299	unsigned new_addr[6];
	300	int i;
	301
	302	if (!capable(CAP_NET_ADMIN))
	303	return -EPERM;
	304
	305	if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
	306	&new_addr[0], &new_addr[1], &new_addr[2],
	307	&new_addr[3], &new_addr[4], &new_addr[5]) != 6)
	308	return -EINVAL;
	309
	310	/* Must be 01:80:c2:00:00:0X */
	311	for (i = 0; i < 5; i++)
	312	if (new_addr[i] != br_group_address[i])
	313	return -EINVAL;
	314
	315	if (new_addr[5] & ~0xf)
	316	return -EINVAL;
	317
	318	if (new_addr[5] == 1 /* 802.3x Pause address */
	319	\|\| new_addr[5] == 2 /* 802.3ad Slow protocols */
	320	\|\| new_addr[5] == 3) /* 802.1X PAE address */
	321	return -EINVAL;
	322
	323	spin_lock_bh(&br->lock);
	324	for (i = 0; i < 6; i++)
	325	br->group_addr[i] = new_addr[i];
	326	spin_unlock_bh(&br->lock);
	327	return len;
	328	}
	329
43cb76d9 GKH	330	static DEVICE_ATTR(group_addr, S_IRUGO \| S_IWUSR,
43cb76d9 GKH	331	show_group_addr, store_group_addr);
fda93d92	332
9cf63747 SH	333	static ssize_t store_flush(struct device *d,
	334	struct device_attribute *attr,
	335	const char *buf, size_t len)
	336	{
	337	struct net_bridge *br = to_bridge(d);
	338
	339	if (!capable(CAP_NET_ADMIN))
	340	return -EPERM;
	341
	342	br_fdb_flush(br);
	343	return len;
	344	}
	345	static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
fda93d92	346
1da177e4	347	static struct attribute *bridge_attrs[] = {
43cb76d9 GKH	348	&dev_attr_forward_delay.attr,
	349	&dev_attr_hello_time.attr,
	350	&dev_attr_max_age.attr,
	351	&dev_attr_ageing_time.attr,
	352	&dev_attr_stp_state.attr,
	353	&dev_attr_priority.attr,
	354	&dev_attr_bridge_id.attr,
	355	&dev_attr_root_id.attr,
	356	&dev_attr_root_path_cost.attr,
	357	&dev_attr_root_port.attr,
	358	&dev_attr_topology_change.attr,
	359	&dev_attr_topology_change_detected.attr,
	360	&dev_attr_hello_timer.attr,
	361	&dev_attr_tcn_timer.attr,
	362	&dev_attr_topology_change_timer.attr,
	363	&dev_attr_gc_timer.attr,
	364	&dev_attr_group_addr.attr,
9cf63747	365	&dev_attr_flush.attr,
1da177e4 LT	366	NULL
	367	};
	368
	369	static struct attribute_group bridge_group = {
	370	.name = SYSFS_BRIDGE_ATTR,
	371	.attrs = bridge_attrs,
	372	};
	373
	374	/*
	375	* Export the forwarding information table as a binary file
	376	* The records are struct __fdb_entry.
	377	*
	378	* Returns the number of bytes read.
	379	*/
91a69029 ZR	380	static ssize_t brforward_read(struct kobject *kobj,
	381	struct bin_attribute *bin_attr,
	382	char *buf, loff_t off, size_t count)
1da177e4	383	{
43cb76d9 GKH	384	struct device *dev = to_dev(kobj);
43cb76d9 GKH	385	struct net_bridge *br = to_bridge(dev);
1da177e4 LT	386	int n;
	387
	388	/* must read whole records */
	389	if (off % sizeof(struct __fdb_entry) != 0)
	390	return -EINVAL;
	391
9d6f229f	392	n = br_fdb_fillbuf(br, buf,
1da177e4 LT	393	count / sizeof(struct __fdb_entry),
	394	off / sizeof(struct __fdb_entry));
	395
	396	if (n > 0)
	397	n *= sizeof(struct __fdb_entry);
9d6f229f	398
1da177e4 LT	399	return n;
	400	}
	401
	402	static struct bin_attribute bridge_forward = {
	403	.attr = { .name = SYSFS_BRIDGE_FDB,
7b595756	404	.mode = S_IRUGO, },
1da177e4 LT	405	.read = brforward_read,
	406	};
	407
	408	/*
	409	* Add entries in sysfs onto the existing network class device
	410	* for the bridge.
	411	* Adds a attribute group "bridge" containing tuning parameters.
	412	* Binary attribute containing the forward table
	413	* Sub directory to hold links to interfaces.
	414	*
	415	* Note: the ifobj exists only to be a subdirectory
	416	* to hold links. The ifobj exists in same data structure
	417	* as it's parent the bridge so reference counting works.
	418	*/
	419	int br_sysfs_addbr(struct net_device *dev)
	420	{
43cb76d9	421	struct kobject *brobj = &dev->dev.kobj;
1da177e4 LT	422	struct net_bridge *br = netdev_priv(dev);
	423	int err;
	424
	425	err = sysfs_create_group(brobj, &bridge_group);
	426	if (err) {
	427	pr_info("%s: can't create group %s/%s\n",
0dc47877	428	__func__, dev->name, bridge_group.name);
1da177e4 LT	429	goto out1;
	430	}
	431
	432	err = sysfs_create_bin_file(brobj, &bridge_forward);
	433	if (err) {
1842c4be	434	pr_info("%s: can't create attribute file %s/%s\n",
0dc47877	435	__func__, dev->name, bridge_forward.attr.name);
1da177e4 LT	436	goto out2;
	437	}
	438
43b98c4a GKH	439	br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
43b98c4a GKH	440	if (!br->ifobj) {
1da177e4	441	pr_info("%s: can't add kobject (directory) %s/%s\n",
0dc47877	442	__func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
1da177e4 LT	443	goto out3;
	444	}
	445	return 0;
	446	out3:
43cb76d9	447	sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
1da177e4	448	out2:
43cb76d9	449	sysfs_remove_group(&dev->dev.kobj, &bridge_group);
1da177e4 LT	450	out1:
	451	return err;
	452
	453	}
	454
	455	void br_sysfs_delbr(struct net_device *dev)
	456	{
43cb76d9	457	struct kobject *kobj = &dev->dev.kobj;
1da177e4 LT	458	struct net_bridge *br = netdev_priv(dev);
1da177e4 LT	459
78a2d906	460	kobject_put(br->ifobj);
1da177e4 LT	461	sysfs_remove_bin_file(kobj, &bridge_forward);
	462	sysfs_remove_group(kobj, &bridge_group);
	463	}