[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_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 ssize_t show_group_addr(struct class_device *cd, char *buf)
{
	struct net_bridge *br = to_bridge(cd);
	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 class_device *cd, const char *buf,
				    size_t len)
{
	struct net_bridge *br = to_bridge(cd);
	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 CLASS_DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
			 show_group_addr, store_group_addr);


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,
	&class_device_attr_group_addr.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);
}
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
	24	#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
	25	#define to_net_dev(class) container_of(class, struct net_device, class_dev)
	26	#define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv))
	27
	28	/*
	29	* Common code for storing bridge parameters.
	30	*/
	31	static ssize_t store_bridge_parm(struct class_device *cd,
	32	const char *buf, size_t len,
	33	void (set)(struct net_bridge , unsigned long))
	34	{
	35	struct net_bridge *br = to_bridge(cd);
	36	char *endp;
	37	unsigned long val;
	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);
	47	(*set)(br, val);
	48	spin_unlock_bh(&br->lock);
	49	return len;
	50	}
	51
	52
	53	static ssize_t show_forward_delay(struct class_device cd, char buf)
	54	{
	55	struct net_bridge *br = to_bridge(cd);
	56	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
	57	}
	58
	59	static void set_forward_delay(struct net_bridge *br, unsigned long val)
	60	{
	61	unsigned long delay = clock_t_to_jiffies(val);
	62	br->forward_delay = delay;
	63	if (br_is_root_bridge(br))
	64	br->bridge_forward_delay = delay;
	65	}
	66
	67	static ssize_t store_forward_delay(struct class_device cd, const char buf,
	68	size_t len)
	69	{
	70	return store_bridge_parm(cd, buf, len, set_forward_delay);
	71	}
	72	static CLASS_DEVICE_ATTR(forward_delay, S_IRUGO \| S_IWUSR,
	73	show_forward_delay, store_forward_delay);
	74
	75	static ssize_t show_hello_time(struct class_device cd, char buf)
	76	{
	77	return sprintf(buf, "%lu\n",
	78	jiffies_to_clock_t(to_bridge(cd)->hello_time));
79	}
80
81	static void set_hello_time(struct net_bridge *br, unsigned long val)
82	{
83	unsigned long t = clock_t_to_jiffies(val);
84	br->hello_time = t;
85	if (br_is_root_bridge(br))
86	br->bridge_hello_time = t;
87	}
88
89	static ssize_t store_hello_time(struct class_device cd, const char buf,
90	size_t len)
91	{
92	return store_bridge_parm(cd, buf, len, set_hello_time);
93	}
94
95	static CLASS_DEVICE_ATTR(hello_time, S_IRUGO \| S_IWUSR, show_hello_time,
96	store_hello_time);
97
98	static ssize_t show_max_age(struct class_device cd, char buf)
99	{
100	return sprintf(buf, "%lu\n",
101	jiffies_to_clock_t(to_bridge(cd)->max_age));
102	}
103
104	static void set_max_age(struct net_bridge *br, unsigned long val)
105	{
106	unsigned long t = clock_t_to_jiffies(val);
107	br->max_age = t;
108	if (br_is_root_bridge(br))
109	br->bridge_max_age = t;
110	}
111
112	static ssize_t store_max_age(struct class_device cd, const char buf,
113	size_t len)
114	{
115	return store_bridge_parm(cd, buf, len, set_max_age);
116	}
117
118	static CLASS_DEVICE_ATTR(max_age, S_IRUGO \| S_IWUSR, show_max_age,
119	store_max_age);
120
121	static ssize_t show_ageing_time(struct class_device cd, char buf)
122	{
123	struct net_bridge *br = to_bridge(cd);
124	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
125	}
126
127	static void set_ageing_time(struct net_bridge *br, unsigned long val)
128	{
129	br->ageing_time = clock_t_to_jiffies(val);
130	}
131
132	static ssize_t store_ageing_time(struct class_device cd, const char buf,
133	size_t len)
134	{
135	return store_bridge_parm(cd, buf, len, set_ageing_time);
136	}
137
138	static CLASS_DEVICE_ATTR(ageing_time, S_IRUGO \| S_IWUSR, show_ageing_time,
139	store_ageing_time);
140	static ssize_t show_stp_state(struct class_device cd, char buf)
141	{
142	struct net_bridge *br = to_bridge(cd);
143	return sprintf(buf, "%d\n", br->stp_enabled);
144	}
145
146	static void set_stp_state(struct net_bridge *br, unsigned long val)
147	{
148	br->stp_enabled = val;
149	}
150
151	static ssize_t store_stp_state(struct class_device *cd,
152	const char *buf, size_t len)
153	{
154	return store_bridge_parm(cd, buf, len, set_stp_state);
155	}
156
157	static CLASS_DEVICE_ATTR(stp_state, S_IRUGO \| S_IWUSR, show_stp_state,
158	store_stp_state);
159
160	static ssize_t show_priority(struct class_device cd, char buf)
161	{
162	struct net_bridge *br = to_bridge(cd);
163	return sprintf(buf, "%d\n",
164	(br->bridge_id.prio[0] << 8) \| br->bridge_id.prio[1]);
165	}
166
167	static void set_priority(struct net_bridge *br, unsigned long val)
168	{
169	br_stp_set_bridge_priority(br, (u16) val);
170	}
171
172	static ssize_t store_priority(struct class_device *cd,
173	const char *buf, size_t len)
174	{
175	return store_bridge_parm(cd, buf, len, set_priority);
176	}
177	static CLASS_DEVICE_ATTR(priority, S_IRUGO \| S_IWUSR, show_priority,
178	store_priority);
179
180	static ssize_t show_root_id(struct class_device cd, char buf)
181	{
182	return br_show_bridge_id(buf, &to_bridge(cd)->designated_root);
183	}
184	static CLASS_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
185
186	static ssize_t show_bridge_id(struct class_device cd, char buf)
187	{
188	return br_show_bridge_id(buf, &to_bridge(cd)->bridge_id);
189	}
190	static CLASS_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
191
192	static ssize_t show_root_port(struct class_device cd, char buf)
193	{
194	return sprintf(buf, "%d\n", to_bridge(cd)->root_port);
195	}
196	static CLASS_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
197
198	static ssize_t show_root_path_cost(struct class_device cd, char buf)
199	{
200	return sprintf(buf, "%d\n", to_bridge(cd)->root_path_cost);
201	}
202	static CLASS_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
203
204	static ssize_t show_topology_change(struct class_device cd, char buf)
205	{
206	return sprintf(buf, "%d\n", to_bridge(cd)->topology_change);
207	}
208	static CLASS_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
209
210	static ssize_t show_topology_change_detected(struct class_device cd, char buf)
211	{
212	struct net_bridge *br = to_bridge(cd);
213	return sprintf(buf, "%d\n", br->topology_change_detected);
214	}
215	static CLASS_DEVICE_ATTR(topology_change_detected, S_IRUGO, show_topology_change_detected, NULL);
216
217	static ssize_t show_hello_timer(struct class_device cd, char buf)
218	{
219	struct net_bridge *br = to_bridge(cd);
220	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
221	}
222	static CLASS_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
223
224	static ssize_t show_tcn_timer(struct class_device cd, char buf)
225	{
226	struct net_bridge *br = to_bridge(cd);
227	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
228	}
229	static CLASS_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
230
231	static ssize_t show_topology_change_timer(struct class_device cd, char buf)
232	{
233	struct net_bridge *br = to_bridge(cd);
234	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
235	}
236	static CLASS_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer, NULL);
237
238	static ssize_t show_gc_timer(struct class_device cd, char buf)
239	{
240	struct net_bridge *br = to_bridge(cd);
241	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
242	}
243	static CLASS_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
244
fda93d92 SH	245	static ssize_t show_group_addr(struct class_device cd, char buf)
	246	{
	247	struct net_bridge *br = to_bridge(cd);
	248	return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
	249	br->group_addr[0], br->group_addr[1],
	250	br->group_addr[2], br->group_addr[3],
	251	br->group_addr[4], br->group_addr[5]);
	252	}
	253
	254	static ssize_t store_group_addr(struct class_device cd, const char buf,
	255	size_t len)
	256	{
	257	struct net_bridge *br = to_bridge(cd);
	258	unsigned new_addr[6];
	259	int i;
	260
	261	if (!capable(CAP_NET_ADMIN))
	262	return -EPERM;
	263
	264	if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
	265	&new_addr[0], &new_addr[1], &new_addr[2],
	266	&new_addr[3], &new_addr[4], &new_addr[5]) != 6)
	267	return -EINVAL;
	268
	269	/* Must be 01:80:c2:00:00:0X */
	270	for (i = 0; i < 5; i++)
	271	if (new_addr[i] != br_group_address[i])
	272	return -EINVAL;
	273
	274	if (new_addr[5] & ~0xf)
	275	return -EINVAL;
	276
	277	if (new_addr[5] == 1 /* 802.3x Pause address */
	278	\|\| new_addr[5] == 2 /* 802.3ad Slow protocols */
	279	\|\| new_addr[5] == 3) /* 802.1X PAE address */
	280	return -EINVAL;
	281
	282	spin_lock_bh(&br->lock);
	283	for (i = 0; i < 6; i++)
	284	br->group_addr[i] = new_addr[i];
	285	spin_unlock_bh(&br->lock);
	286	return len;
	287	}
	288
	289	static CLASS_DEVICE_ATTR(group_addr, S_IRUGO \| S_IWUSR,
	290	show_group_addr, store_group_addr);
	291
	292
1da177e4 LT	293	static struct attribute *bridge_attrs[] = {
	294	&class_device_attr_forward_delay.attr,
	295	&class_device_attr_hello_time.attr,
	296	&class_device_attr_max_age.attr,
	297	&class_device_attr_ageing_time.attr,
	298	&class_device_attr_stp_state.attr,
	299	&class_device_attr_priority.attr,
	300	&class_device_attr_bridge_id.attr,
	301	&class_device_attr_root_id.attr,
	302	&class_device_attr_root_path_cost.attr,
	303	&class_device_attr_root_port.attr,
	304	&class_device_attr_topology_change.attr,
	305	&class_device_attr_topology_change_detected.attr,
	306	&class_device_attr_hello_timer.attr,
	307	&class_device_attr_tcn_timer.attr,
	308	&class_device_attr_topology_change_timer.attr,
	309	&class_device_attr_gc_timer.attr,
fda93d92	310	&class_device_attr_group_addr.attr,
1da177e4 LT	311	NULL
	312	};
	313
	314	static struct attribute_group bridge_group = {
	315	.name = SYSFS_BRIDGE_ATTR,
	316	.attrs = bridge_attrs,
	317	};
	318
	319	/*
	320	* Export the forwarding information table as a binary file
	321	* The records are struct __fdb_entry.
	322	*
	323	* Returns the number of bytes read.
	324	*/
	325	static ssize_t brforward_read(struct kobject kobj, char buf,
	326	loff_t off, size_t count)
	327	{
	328	struct class_device *cdev = to_class_dev(kobj);
	329	struct net_bridge *br = to_bridge(cdev);
	330	int n;
	331
	332	/* must read whole records */
	333	if (off % sizeof(struct __fdb_entry) != 0)
	334	return -EINVAL;
	335
	336	n = br_fdb_fillbuf(br, buf,
	337	count / sizeof(struct __fdb_entry),
	338	off / sizeof(struct __fdb_entry));
	339
	340	if (n > 0)
	341	n *= sizeof(struct __fdb_entry);
	342
	343	return n;
	344	}
	345
	346	static struct bin_attribute bridge_forward = {
	347	.attr = { .name = SYSFS_BRIDGE_FDB,
	348	.mode = S_IRUGO,
	349	.owner = THIS_MODULE, },
	350	.read = brforward_read,
	351	};
	352
	353	/*
	354	* Add entries in sysfs onto the existing network class device
	355	* for the bridge.
	356	* Adds a attribute group "bridge" containing tuning parameters.
	357	* Binary attribute containing the forward table
	358	* Sub directory to hold links to interfaces.
	359	*
	360	* Note: the ifobj exists only to be a subdirectory
	361	* to hold links. The ifobj exists in same data structure
	362	* as it's parent the bridge so reference counting works.
	363	*/
	364	int br_sysfs_addbr(struct net_device *dev)
	365	{
	366	struct kobject *brobj = &dev->class_dev.kobj;
	367	struct net_bridge *br = netdev_priv(dev);
	368	int err;
	369
	370	err = sysfs_create_group(brobj, &bridge_group);
	371	if (err) {
	372	pr_info("%s: can't create group %s/%s\n",
	373	__FUNCTION__, dev->name, bridge_group.name);
	374	goto out1;
375	}
376
377	err = sysfs_create_bin_file(brobj, &bridge_forward);
378	if (err) {
379	pr_info("%s: can't create attribue file %s/%s\n",
380	__FUNCTION__, dev->name, bridge_forward.attr.name);
381	goto out2;
382	}
383
384
385	kobject_set_name(&br->ifobj, SYSFS_BRIDGE_PORT_SUBDIR);
386	br->ifobj.ktype = NULL;
387	br->ifobj.kset = NULL;
388	br->ifobj.parent = brobj;
389
390	err = kobject_register(&br->ifobj);
391	if (err) {
392	pr_info("%s: can't add kobject (directory) %s/%s\n",
393	__FUNCTION__, dev->name, br->ifobj.name);
394	goto out3;
395	}
396	return 0;
397	out3:
398	sysfs_remove_bin_file(&dev->class_dev.kobj, &bridge_forward);
399	out2:
400	sysfs_remove_group(&dev->class_dev.kobj, &bridge_group);
401	out1:
402	return err;
403
404	}
405
406	void br_sysfs_delbr(struct net_device *dev)
407	{
408	struct kobject *kobj = &dev->class_dev.kobj;
409	struct net_bridge *br = netdev_priv(dev);
410
411	kobject_unregister(&br->ifobj);
412	sysfs_remove_bin_file(kobj, &bridge_forward);
413	sysfs_remove_group(kobj, &bridge_group);
414	}