[mirror_ubuntu-bionic-kernel.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 *)netdev_priv(to_net_dev(cd)))

/*
 * 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;

	if (!rtnl_trylock())
		return restart_syscall();
	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)
524ad0a7	25	#define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
1da177e4 LT	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
af38f298 EB	175	if (!rtnl_trylock())
af38f298 EB	176	return restart_syscall();
17120889 SH	177	br_stp_set_enabled(br, val);
	178	rtnl_unlock();
	179
35b426c3	180	return len;
1da177e4	181	}
43cb76d9 GKH	182	static DEVICE_ATTR(stp_state, S_IRUGO \| S_IWUSR, show_stp_state,
43cb76d9 GKH	183	store_stp_state);
1da177e4	184
43cb76d9 GKH	185	static ssize_t show_priority(struct device d, struct device_attribute attr,
43cb76d9 GKH	186	char *buf)
1da177e4	187	{
43cb76d9	188	struct net_bridge *br = to_bridge(d);
1da177e4 LT	189	return sprintf(buf, "%d\n",
	190	(br->bridge_id.prio[0] << 8) \| br->bridge_id.prio[1]);
	191	}
	192
8d4698f7	193	static int set_priority(struct net_bridge *br, unsigned long val)
1da177e4 LT	194	{
1da177e4 LT	195	br_stp_set_bridge_priority(br, (u16) val);
8d4698f7	196	return 0;
1da177e4 LT	197	}
1da177e4 LT	198
43cb76d9	199	static ssize_t store_priority(struct device d, struct device_attribute attr,
1da177e4 LT	200	const char *buf, size_t len)
1da177e4 LT	201	{
43cb76d9	202	return store_bridge_parm(d, buf, len, set_priority);
1da177e4	203	}
43cb76d9	204	static DEVICE_ATTR(priority, S_IRUGO \| S_IWUSR, show_priority, store_priority);
1da177e4	205
43cb76d9 GKH	206	static ssize_t show_root_id(struct device d, struct device_attribute attr,
43cb76d9 GKH	207	char *buf)
1da177e4	208	{
43cb76d9	209	return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
1da177e4	210	}
43cb76d9	211	static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
1da177e4	212
43cb76d9 GKH	213	static ssize_t show_bridge_id(struct device d, struct device_attribute attr,
43cb76d9 GKH	214	char *buf)
1da177e4	215	{
43cb76d9	216	return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
1da177e4	217	}
43cb76d9	218	static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
1da177e4	219
43cb76d9 GKH	220	static ssize_t show_root_port(struct device d, struct device_attribute attr,
43cb76d9 GKH	221	char *buf)
1da177e4	222	{
43cb76d9	223	return sprintf(buf, "%d\n", to_bridge(d)->root_port);
1da177e4	224	}
43cb76d9	225	static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
1da177e4	226
43cb76d9 GKH	227	static ssize_t show_root_path_cost(struct device *d,
43cb76d9 GKH	228	struct device_attribute attr, char buf)
1da177e4	229	{
43cb76d9	230	return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
1da177e4	231	}
43cb76d9	232	static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
1da177e4	233
43cb76d9 GKH	234	static ssize_t show_topology_change(struct device *d,
43cb76d9 GKH	235	struct device_attribute attr, char buf)
1da177e4	236	{
43cb76d9	237	return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
1da177e4	238	}
43cb76d9	239	static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
1da177e4	240
43cb76d9 GKH	241	static ssize_t show_topology_change_detected(struct device *d,
	242	struct device_attribute *attr,
	243	char *buf)
1da177e4	244	{
43cb76d9	245	struct net_bridge *br = to_bridge(d);
1da177e4 LT	246	return sprintf(buf, "%d\n", br->topology_change_detected);
1da177e4 LT	247	}
43cb76d9 GKH	248	static DEVICE_ATTR(topology_change_detected, S_IRUGO,
43cb76d9 GKH	249	show_topology_change_detected, NULL);
1da177e4	250
43cb76d9 GKH	251	static ssize_t show_hello_timer(struct device *d,
43cb76d9 GKH	252	struct device_attribute attr, char buf)
1da177e4	253	{
43cb76d9	254	struct net_bridge *br = to_bridge(d);
1da177e4 LT	255	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
1da177e4 LT	256	}
43cb76d9	257	static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
1da177e4	258
43cb76d9 GKH	259	static ssize_t show_tcn_timer(struct device d, struct device_attribute attr,
43cb76d9 GKH	260	char *buf)
1da177e4	261	{
43cb76d9	262	struct net_bridge *br = to_bridge(d);
1da177e4 LT	263	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
1da177e4 LT	264	}
43cb76d9	265	static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
1da177e4	266
43cb76d9 GKH	267	static ssize_t show_topology_change_timer(struct device *d,
	268	struct device_attribute *attr,
	269	char *buf)
1da177e4	270	{
43cb76d9	271	struct net_bridge *br = to_bridge(d);
1da177e4 LT	272	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
1da177e4 LT	273	}
43cb76d9 GKH	274	static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
43cb76d9 GKH	275	NULL);
1da177e4	276
43cb76d9 GKH	277	static ssize_t show_gc_timer(struct device d, struct device_attribute attr,
43cb76d9 GKH	278	char *buf)
1da177e4	279	{
43cb76d9	280	struct net_bridge *br = to_bridge(d);
1da177e4 LT	281	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
1da177e4 LT	282	}
43cb76d9	283	static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
1da177e4	284
43cb76d9 GKH	285	static ssize_t show_group_addr(struct device *d,
43cb76d9 GKH	286	struct device_attribute attr, char buf)
fda93d92	287	{
43cb76d9	288	struct net_bridge *br = to_bridge(d);
fda93d92 SH	289	return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
	290	br->group_addr[0], br->group_addr[1],
	291	br->group_addr[2], br->group_addr[3],
	292	br->group_addr[4], br->group_addr[5]);
	293	}
	294
43cb76d9 GKH	295	static ssize_t store_group_addr(struct device *d,
	296	struct device_attribute *attr,
	297	const char *buf, size_t len)
fda93d92	298	{
43cb76d9	299	struct net_bridge *br = to_bridge(d);
fda93d92 SH	300	unsigned new_addr[6];
	301	int i;
	302
	303	if (!capable(CAP_NET_ADMIN))
	304	return -EPERM;
	305
	306	if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
	307	&new_addr[0], &new_addr[1], &new_addr[2],
	308	&new_addr[3], &new_addr[4], &new_addr[5]) != 6)
	309	return -EINVAL;
	310
	311	/* Must be 01:80:c2:00:00:0X */
	312	for (i = 0; i < 5; i++)
	313	if (new_addr[i] != br_group_address[i])
	314	return -EINVAL;
	315
	316	if (new_addr[5] & ~0xf)
	317	return -EINVAL;
	318
f64f9e71 JP	319	if (new_addr[5] == 1 \|\| /* 802.3x Pause address */
	320	new_addr[5] == 2 \|\| /* 802.3ad Slow protocols */
	321	new_addr[5] == 3) /* 802.1X PAE address */
fda93d92 SH	322	return -EINVAL;
	323
	324	spin_lock_bh(&br->lock);
	325	for (i = 0; i < 6; i++)
	326	br->group_addr[i] = new_addr[i];
	327	spin_unlock_bh(&br->lock);
	328	return len;
	329	}
	330
43cb76d9 GKH	331	static DEVICE_ATTR(group_addr, S_IRUGO \| S_IWUSR,
43cb76d9 GKH	332	show_group_addr, store_group_addr);
fda93d92	333
9cf63747 SH	334	static ssize_t store_flush(struct device *d,
	335	struct device_attribute *attr,
	336	const char *buf, size_t len)
	337	{
	338	struct net_bridge *br = to_bridge(d);
	339
	340	if (!capable(CAP_NET_ADMIN))
	341	return -EPERM;
	342
	343	br_fdb_flush(br);
	344	return len;
	345	}
	346	static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
fda93d92	347
1da177e4	348	static struct attribute *bridge_attrs[] = {
43cb76d9 GKH	349	&dev_attr_forward_delay.attr,
	350	&dev_attr_hello_time.attr,
	351	&dev_attr_max_age.attr,
	352	&dev_attr_ageing_time.attr,
	353	&dev_attr_stp_state.attr,
	354	&dev_attr_priority.attr,
	355	&dev_attr_bridge_id.attr,
	356	&dev_attr_root_id.attr,
	357	&dev_attr_root_path_cost.attr,
	358	&dev_attr_root_port.attr,
	359	&dev_attr_topology_change.attr,
	360	&dev_attr_topology_change_detected.attr,
	361	&dev_attr_hello_timer.attr,
	362	&dev_attr_tcn_timer.attr,
	363	&dev_attr_topology_change_timer.attr,
	364	&dev_attr_gc_timer.attr,
	365	&dev_attr_group_addr.attr,
9cf63747	366	&dev_attr_flush.attr,
1da177e4 LT	367	NULL
	368	};
	369
	370	static struct attribute_group bridge_group = {
	371	.name = SYSFS_BRIDGE_ATTR,
	372	.attrs = bridge_attrs,
	373	};
	374
	375	/*
	376	* Export the forwarding information table as a binary file
	377	* The records are struct __fdb_entry.
	378	*
	379	* Returns the number of bytes read.
	380	*/
91a69029 ZR	381	static ssize_t brforward_read(struct kobject *kobj,
	382	struct bin_attribute *bin_attr,
	383	char *buf, loff_t off, size_t count)
1da177e4	384	{
43cb76d9 GKH	385	struct device *dev = to_dev(kobj);
43cb76d9 GKH	386	struct net_bridge *br = to_bridge(dev);
1da177e4 LT	387	int n;
	388
	389	/* must read whole records */
	390	if (off % sizeof(struct __fdb_entry) != 0)
	391	return -EINVAL;
	392
9d6f229f	393	n = br_fdb_fillbuf(br, buf,
1da177e4 LT	394	count / sizeof(struct __fdb_entry),
	395	off / sizeof(struct __fdb_entry));
	396
	397	if (n > 0)
	398	n *= sizeof(struct __fdb_entry);
9d6f229f	399
1da177e4 LT	400	return n;
	401	}
	402
	403	static struct bin_attribute bridge_forward = {
	404	.attr = { .name = SYSFS_BRIDGE_FDB,
7b595756	405	.mode = S_IRUGO, },
1da177e4 LT	406	.read = brforward_read,
	407	};
	408
	409	/*
	410	* Add entries in sysfs onto the existing network class device
	411	* for the bridge.
	412	* Adds a attribute group "bridge" containing tuning parameters.
	413	* Binary attribute containing the forward table
	414	* Sub directory to hold links to interfaces.
	415	*
	416	* Note: the ifobj exists only to be a subdirectory
	417	* to hold links. The ifobj exists in same data structure
	418	* as it's parent the bridge so reference counting works.
	419	*/
	420	int br_sysfs_addbr(struct net_device *dev)
	421	{
43cb76d9	422	struct kobject *brobj = &dev->dev.kobj;
1da177e4 LT	423	struct net_bridge *br = netdev_priv(dev);
	424	int err;
	425
	426	err = sysfs_create_group(brobj, &bridge_group);
	427	if (err) {
	428	pr_info("%s: can't create group %s/%s\n",
0dc47877	429	__func__, dev->name, bridge_group.name);
1da177e4 LT	430	goto out1;
	431	}
	432
	433	err = sysfs_create_bin_file(brobj, &bridge_forward);
	434	if (err) {
1842c4be	435	pr_info("%s: can't create attribute file %s/%s\n",
0dc47877	436	__func__, dev->name, bridge_forward.attr.name);
1da177e4 LT	437	goto out2;
	438	}
	439
43b98c4a GKH	440	br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
43b98c4a GKH	441	if (!br->ifobj) {
1da177e4	442	pr_info("%s: can't add kobject (directory) %s/%s\n",
0dc47877	443	__func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
1da177e4 LT	444	goto out3;
	445	}
	446	return 0;
	447	out3:
43cb76d9	448	sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
1da177e4	449	out2:
43cb76d9	450	sysfs_remove_group(&dev->dev.kobj, &bridge_group);
1da177e4 LT	451	out1:
	452	return err;
	453
	454	}
	455
	456	void br_sysfs_delbr(struct net_device *dev)
	457	{
43cb76d9	458	struct kobject *kobj = &dev->dev.kobj;
1da177e4 LT	459	struct net_bridge *br = netdev_priv(dev);
1da177e4 LT	460
78a2d906	461	kobject_put(br->ifobj);
1da177e4 LT	462	sysfs_remove_bin_file(kobj, &bridge_forward);
	463	sysfs_remove_group(kobj, &bridge_group);
	464	}