[net-next-2.6.git] / net / core / net-sysfs.c

/*
 * net-sysfs.c - network device class and attributes
 *
 * Copyright (c) 2003 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/config.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <net/sock.h>
#include <linux/rtnetlink.h>
#include <linux/wireless.h>
#include <net/iw_handler.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)

static const char fmt_hex[] = "%#x\n";
static const char fmt_long_hex[] = "%#lx\n";
static const char fmt_dec[] = "%d\n";
static const char fmt_ulong[] = "%lu\n";

static inline int dev_isalive(const struct net_device *dev) 
{
	return dev->reg_state == NETREG_REGISTERED;
}

/* use same locking rules as GIF* ioctl's */
static ssize_t netdev_show(const struct class_device *cd, char *buf,
			   ssize_t (*format)(const struct net_device *, char *))
{
	struct net_device *net = to_net_dev(cd);
	ssize_t ret = -EINVAL;

	read_lock(&dev_base_lock);
	if (dev_isalive(net))
		ret = (*format)(net, buf);
	read_unlock(&dev_base_lock);

	return ret;
}

/* generate a show function for simple field */
#define NETDEVICE_SHOW(field, format_string)				\
static ssize_t format_##field(const struct net_device *net, char *buf)	\
{									\
	return sprintf(buf, format_string, net->field);			\
}									\
static ssize_t show_##field(struct class_device *cd, char *buf)		\
{									\
	return netdev_show(cd, buf, format_##field);			\
}


/* use same locking and permission rules as SIF* ioctl's */
static ssize_t netdev_store(struct class_device *dev,
			    const char *buf, size_t len,
			    int (*set)(struct net_device *, unsigned long))
{
	struct net_device *net = to_net_dev(dev);
	char *endp;
	unsigned long new;
	int ret = -EINVAL;

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

	new = simple_strtoul(buf, &endp, 0);
	if (endp == buf)
		goto err;

	rtnl_lock();
	if (dev_isalive(net)) {
		if ((ret = (*set)(net, new)) == 0)
			ret = len;
	}
	rtnl_unlock();
 err:
	return ret;
}

NETDEVICE_SHOW(addr_len, fmt_dec);
NETDEVICE_SHOW(iflink, fmt_dec);
NETDEVICE_SHOW(ifindex, fmt_dec);
NETDEVICE_SHOW(features, fmt_long_hex);
NETDEVICE_SHOW(type, fmt_dec);

/* use same locking rules as GIFHWADDR ioctl's */
static ssize_t format_addr(char *buf, const unsigned char *addr, int len)
{
	int i;
	char *cp = buf;

	for (i = 0; i < len; i++)
		cp += sprintf(cp, "%02x%c", addr[i],
			      i == (len - 1) ? '\n' : ':');
	return cp - buf;
}

static ssize_t show_address(struct class_device *dev, char *buf)
{
	struct net_device *net = to_net_dev(dev);
	ssize_t ret = -EINVAL;

	read_lock(&dev_base_lock);
	if (dev_isalive(net))
	    ret = format_addr(buf, net->dev_addr, net->addr_len);
	read_unlock(&dev_base_lock);
	return ret;
}

static ssize_t show_broadcast(struct class_device *dev, char *buf)
{
	struct net_device *net = to_net_dev(dev);
	if (dev_isalive(net))
		return format_addr(buf, net->broadcast, net->addr_len);
	return -EINVAL;
}

static ssize_t show_carrier(struct class_device *dev, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	if (netif_running(netdev)) {
		return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
	}
	return -EINVAL;
}

/* read-write attributes */
NETDEVICE_SHOW(mtu, fmt_dec);

static int change_mtu(struct net_device *net, unsigned long new_mtu)
{
	return dev_set_mtu(net, (int) new_mtu);
}

static ssize_t store_mtu(struct class_device *dev, const char *buf, size_t len)
{
	return netdev_store(dev, buf, len, change_mtu);
}

NETDEVICE_SHOW(flags, fmt_hex);

static int change_flags(struct net_device *net, unsigned long new_flags)
{
	return dev_change_flags(net, (unsigned) new_flags);
}

static ssize_t store_flags(struct class_device *dev, const char *buf, size_t len)
{
	return netdev_store(dev, buf, len, change_flags);
}

NETDEVICE_SHOW(tx_queue_len, fmt_ulong);

static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
{
	net->tx_queue_len = new_len;
	return 0;
}

static ssize_t store_tx_queue_len(struct class_device *dev, const char *buf, size_t len)
{
	return netdev_store(dev, buf, len, change_tx_queue_len);
}

NETDEVICE_SHOW(weight, fmt_dec);

static int change_weight(struct net_device *net, unsigned long new_weight)
{
	net->weight = new_weight;
	return 0;
}

static ssize_t store_weight(struct class_device *dev, const char *buf, size_t len)
{
	return netdev_store(dev, buf, len, change_weight);
}

static struct class_device_attribute net_class_attributes[] = {
	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
	__ATTR(iflink, S_IRUGO, show_iflink, NULL),
	__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
	__ATTR(features, S_IRUGO, show_features, NULL),
	__ATTR(type, S_IRUGO, show_type, NULL),
	__ATTR(address, S_IRUGO, show_address, NULL),
	__ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
	__ATTR(carrier, S_IRUGO, show_carrier, NULL),
	__ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),
	__ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
	__ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
	       store_tx_queue_len),
	__ATTR(weight, S_IRUGO | S_IWUSR, show_weight, store_weight),
	{}
};

/* Show a given an attribute in the statistics group */
static ssize_t netstat_show(const struct class_device *cd, char *buf, 
			    unsigned long offset)
{
	struct net_device *dev = to_net_dev(cd);
	struct net_device_stats *stats;
	ssize_t ret = -EINVAL;

	if (offset > sizeof(struct net_device_stats) ||
	    offset % sizeof(unsigned long) != 0)
		WARN_ON(1);

	read_lock(&dev_base_lock);
	if (dev_isalive(dev) && dev->get_stats &&
	    (stats = (*dev->get_stats)(dev))) 
		ret = sprintf(buf, fmt_ulong,
			      *(unsigned long *)(((u8 *) stats) + offset));

	read_unlock(&dev_base_lock);
	return ret;
}

/* generate a read-only statistics attribute */
#define NETSTAT_ENTRY(name)						\
static ssize_t show_##name(struct class_device *cd, char *buf) 		\
{									\
	return netstat_show(cd, buf, 					\
			    offsetof(struct net_device_stats, name));	\
}									\
static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)

NETSTAT_ENTRY(rx_packets);
NETSTAT_ENTRY(tx_packets);
NETSTAT_ENTRY(rx_bytes);
NETSTAT_ENTRY(tx_bytes);
NETSTAT_ENTRY(rx_errors);
NETSTAT_ENTRY(tx_errors);
NETSTAT_ENTRY(rx_dropped);
NETSTAT_ENTRY(tx_dropped);
NETSTAT_ENTRY(multicast);
NETSTAT_ENTRY(collisions);
NETSTAT_ENTRY(rx_length_errors);
NETSTAT_ENTRY(rx_over_errors);
NETSTAT_ENTRY(rx_crc_errors);
NETSTAT_ENTRY(rx_frame_errors);
NETSTAT_ENTRY(rx_fifo_errors);
NETSTAT_ENTRY(rx_missed_errors);
NETSTAT_ENTRY(tx_aborted_errors);
NETSTAT_ENTRY(tx_carrier_errors);
NETSTAT_ENTRY(tx_fifo_errors);
NETSTAT_ENTRY(tx_heartbeat_errors);
NETSTAT_ENTRY(tx_window_errors);
NETSTAT_ENTRY(rx_compressed);
NETSTAT_ENTRY(tx_compressed);

static struct attribute *netstat_attrs[] = {
	&class_device_attr_rx_packets.attr,
	&class_device_attr_tx_packets.attr,
	&class_device_attr_rx_bytes.attr,
	&class_device_attr_tx_bytes.attr,
	&class_device_attr_rx_errors.attr,
	&class_device_attr_tx_errors.attr,
	&class_device_attr_rx_dropped.attr,
	&class_device_attr_tx_dropped.attr,
	&class_device_attr_multicast.attr,
	&class_device_attr_collisions.attr,
	&class_device_attr_rx_length_errors.attr,
	&class_device_attr_rx_over_errors.attr,
	&class_device_attr_rx_crc_errors.attr,
	&class_device_attr_rx_frame_errors.attr,
	&class_device_attr_rx_fifo_errors.attr,
	&class_device_attr_rx_missed_errors.attr,
	&class_device_attr_tx_aborted_errors.attr,
	&class_device_attr_tx_carrier_errors.attr,
	&class_device_attr_tx_fifo_errors.attr,
	&class_device_attr_tx_heartbeat_errors.attr,
	&class_device_attr_tx_window_errors.attr,
	&class_device_attr_rx_compressed.attr,
	&class_device_attr_tx_compressed.attr,
	NULL
};


static struct attribute_group netstat_group = {
	.name  = "statistics",
	.attrs  = netstat_attrs,
};

#ifdef WIRELESS_EXT
/* helper function that does all the locking etc for wireless stats */
static ssize_t wireless_show(struct class_device *cd, char *buf,
			     ssize_t (*format)(const struct iw_statistics *,
					       char *))
{
	struct net_device *dev = to_net_dev(cd);
	const struct iw_statistics *iw = NULL;
	ssize_t ret = -EINVAL;
	
	read_lock(&dev_base_lock);
	if (dev_isalive(dev)) {
		if(dev->wireless_handlers &&
		   dev->wireless_handlers->get_wireless_stats)
			iw = dev->wireless_handlers->get_wireless_stats(dev);
		else if (dev->get_wireless_stats)
			iw = dev->get_wireless_stats(dev);
		if (iw != NULL)
			ret = (*format)(iw, buf);
	}
	read_unlock(&dev_base_lock);

	return ret;
}

/* show function template for wireless fields */
#define WIRELESS_SHOW(name, field, format_string)			\
static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
{									\
	return sprintf(buf, format_string, iw->field);			\
}									\
static ssize_t show_iw_##name(struct class_device *cd, char *buf)	\
{									\
	return wireless_show(cd, buf, format_iw_##name);		\
}									\
static CLASS_DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)

WIRELESS_SHOW(status, status, fmt_hex);
WIRELESS_SHOW(link, qual.qual, fmt_dec);
WIRELESS_SHOW(level, qual.level, fmt_dec);
WIRELESS_SHOW(noise, qual.noise, fmt_dec);
WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
WIRELESS_SHOW(crypt, discard.code, fmt_dec);
WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
WIRELESS_SHOW(misc, discard.misc, fmt_dec);
WIRELESS_SHOW(retries, discard.retries, fmt_dec);
WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);

static struct attribute *wireless_attrs[] = {
	&class_device_attr_status.attr,
	&class_device_attr_link.attr,
	&class_device_attr_level.attr,
	&class_device_attr_noise.attr,
	&class_device_attr_nwid.attr,
	&class_device_attr_crypt.attr,
	&class_device_attr_fragment.attr,
	&class_device_attr_retries.attr,
	&class_device_attr_misc.attr,
	&class_device_attr_beacon.attr,
	NULL
};

static struct attribute_group wireless_group = {
	.name = "wireless",
	.attrs = wireless_attrs,
};
#endif

#ifdef CONFIG_HOTPLUG
static int netdev_uevent(struct class_device *cd, char **envp,
			 int num_envp, char *buf, int size)
{
	struct net_device *dev = to_net_dev(cd);
	int i = 0;
	int n;

	/* pass interface to uevent. */
	envp[i++] = buf;
	n = snprintf(buf, size, "INTERFACE=%s", dev->name) + 1;
	buf += n;
	size -= n;

	if ((size <= 0) || (i >= num_envp))
		return -ENOMEM;

	envp[i] = NULL;
	return 0;
}
#endif

/*
 *	netdev_release -- destroy and free a dead device. 
 *	Called when last reference to class_device kobject is gone.
 */
static void netdev_release(struct class_device *cd)
{
	struct net_device *dev 
		= container_of(cd, struct net_device, class_dev);

	BUG_ON(dev->reg_state != NETREG_RELEASED);

	kfree((char *)dev - dev->padded);
}

static struct class net_class = {
	.name = "net",
	.release = netdev_release,
	.class_dev_attrs = net_class_attributes,
#ifdef CONFIG_HOTPLUG
	.uevent = netdev_uevent,
#endif
};

void netdev_unregister_sysfs(struct net_device * net)
{
	struct class_device * class_dev = &(net->class_dev);

	if (net->get_stats)
		sysfs_remove_group(&class_dev->kobj, &netstat_group);

#ifdef WIRELESS_EXT
	if (net->get_wireless_stats || (net->wireless_handlers &&
			net->wireless_handlers->get_wireless_stats))
		sysfs_remove_group(&class_dev->kobj, &wireless_group);
#endif
	class_device_del(class_dev);

}

/* Create sysfs entries for network device. */
int netdev_register_sysfs(struct net_device *net)
{
	struct class_device *class_dev = &(net->class_dev);
	int ret;

	class_dev->class = &net_class;
	class_dev->class_data = net;

	strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
	if ((ret = class_device_register(class_dev)))
		goto out;

	if (net->get_stats &&
	    (ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
		goto out_unreg; 

#ifdef WIRELESS_EXT
	if (net->get_wireless_stats || (net->wireless_handlers &&
			net->wireless_handlers->get_wireless_stats)) {
		ret = sysfs_create_group(&class_dev->kobj, &wireless_group);
		if (ret)
			goto out_cleanup;
	}
	return 0;
out_cleanup:
	if (net->get_stats)
		sysfs_remove_group(&class_dev->kobj, &netstat_group);
#else
	return 0;
#endif

out_unreg:
	printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n",
	       net->name, ret);
	class_device_unregister(class_dev);
out:
	return ret;
}

int netdev_sysfs_init(void)
{
	return class_register(&net_class);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* net-sysfs.c - network device class and attributes
	3	*
	4	* Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
4fc268d2	12	#include <linux/capability.h>
1da177e4 LT	13	#include <linux/config.h>
	14	#include <linux/kernel.h>
	15	#include <linux/netdevice.h>
	16	#include <linux/if_arp.h>
	17	#include <net/sock.h>
	18	#include <linux/rtnetlink.h>
	19	#include <linux/wireless.h>
6dd214b5	20	#include <net/iw_handler.h>
1da177e4 LT	21
	22	#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
	23	#define to_net_dev(class) container_of(class, struct net_device, class_dev)
	24
	25	static const char fmt_hex[] = "%#x\n";
d1102b59	26	static const char fmt_long_hex[] = "%#lx\n";
1da177e4 LT	27	static const char fmt_dec[] = "%d\n";
	28	static const char fmt_ulong[] = "%lu\n";
	29
	30	static inline int dev_isalive(const struct net_device *dev)
	31	{
	32	return dev->reg_state == NETREG_REGISTERED;
	33	}
	34
	35	/* use same locking rules as GIF* ioctl's */
	36	static ssize_t netdev_show(const struct class_device cd, char buf,
	37	ssize_t (format)(const struct net_device , char *))
	38	{
	39	struct net_device *net = to_net_dev(cd);
	40	ssize_t ret = -EINVAL;
	41
	42	read_lock(&dev_base_lock);
	43	if (dev_isalive(net))
	44	ret = (*format)(net, buf);
	45	read_unlock(&dev_base_lock);
	46
	47	return ret;
	48	}
	49
	50	/* generate a show function for simple field */
	51	#define NETDEVICE_SHOW(field, format_string) \
	52	static ssize_t format_##field(const struct net_device net, char buf) \
	53	{ \
	54	return sprintf(buf, format_string, net->field); \
	55	} \
	56	static ssize_t show_##field(struct class_device cd, char buf) \
	57	{ \
	58	return netdev_show(cd, buf, format_##field); \
	59	}
	60
	61
	62	/* use same locking and permission rules as SIF* ioctl's */
	63	static ssize_t netdev_store(struct class_device *dev,
	64	const char *buf, size_t len,
	65	int (set)(struct net_device , unsigned long))
	66	{
	67	struct net_device *net = to_net_dev(dev);
	68	char *endp;
	69	unsigned long new;
	70	int ret = -EINVAL;
	71
	72	if (!capable(CAP_NET_ADMIN))
	73	return -EPERM;
	74
	75	new = simple_strtoul(buf, &endp, 0);
	76	if (endp == buf)
	77	goto err;
	78
	79	rtnl_lock();
	80	if (dev_isalive(net)) {
	81	if ((ret = (*set)(net, new)) == 0)
	82	ret = len;
	83	}
	84	rtnl_unlock();
	85	err:
	86	return ret;
	87	}
	88
fd586bac KS	89	NETDEVICE_SHOW(addr_len, fmt_dec);
	90	NETDEVICE_SHOW(iflink, fmt_dec);
	91	NETDEVICE_SHOW(ifindex, fmt_dec);
	92	NETDEVICE_SHOW(features, fmt_long_hex);
	93	NETDEVICE_SHOW(type, fmt_dec);
1da177e4 LT	94
	95	/* use same locking rules as GIFHWADDR ioctl's */
	96	static ssize_t format_addr(char buf, const unsigned char addr, int len)
	97	{
	98	int i;
	99	char *cp = buf;
	100
	101	for (i = 0; i < len; i++)
	102	cp += sprintf(cp, "%02x%c", addr[i],
	103	i == (len - 1) ? '\n' : ':');
	104	return cp - buf;
	105	}
	106
	107	static ssize_t show_address(struct class_device dev, char buf)
	108	{
	109	struct net_device *net = to_net_dev(dev);
	110	ssize_t ret = -EINVAL;
	111
	112	read_lock(&dev_base_lock);
	113	if (dev_isalive(net))
	114	ret = format_addr(buf, net->dev_addr, net->addr_len);
	115	read_unlock(&dev_base_lock);
	116	return ret;
	117	}
	118
	119	static ssize_t show_broadcast(struct class_device dev, char buf)
	120	{
	121	struct net_device *net = to_net_dev(dev);
	122	if (dev_isalive(net))
	123	return format_addr(buf, net->broadcast, net->addr_len);
	124	return -EINVAL;
	125	}
	126
	127	static ssize_t show_carrier(struct class_device dev, char buf)
	128	{
	129	struct net_device *netdev = to_net_dev(dev);
	130	if (netif_running(netdev)) {
	131	return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
	132	}
	133	return -EINVAL;
	134	}
	135
1da177e4 LT	136	/* read-write attributes */
	137	NETDEVICE_SHOW(mtu, fmt_dec);
	138
	139	static int change_mtu(struct net_device *net, unsigned long new_mtu)
	140	{
	141	return dev_set_mtu(net, (int) new_mtu);
	142	}
	143
	144	static ssize_t store_mtu(struct class_device dev, const char buf, size_t len)
	145	{
	146	return netdev_store(dev, buf, len, change_mtu);
	147	}
	148
1da177e4 LT	149	NETDEVICE_SHOW(flags, fmt_hex);
	150
	151	static int change_flags(struct net_device *net, unsigned long new_flags)
	152	{
	153	return dev_change_flags(net, (unsigned) new_flags);
	154	}
	155
	156	static ssize_t store_flags(struct class_device dev, const char buf, size_t len)
	157	{
	158	return netdev_store(dev, buf, len, change_flags);
	159	}
	160
1da177e4 LT	161	NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
	162
	163	static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
	164	{
	165	net->tx_queue_len = new_len;
	166	return 0;
	167	}
	168
	169	static ssize_t store_tx_queue_len(struct class_device dev, const char buf, size_t len)
	170	{
	171	return netdev_store(dev, buf, len, change_tx_queue_len);
	172	}
	173
699a4114 SH	174	NETDEVICE_SHOW(weight, fmt_dec);
	175
	176	static int change_weight(struct net_device *net, unsigned long new_weight)
	177	{
	178	net->weight = new_weight;
	179	return 0;
	180	}
	181
	182	static ssize_t store_weight(struct class_device dev, const char buf, size_t len)
	183	{
	184	return netdev_store(dev, buf, len, change_weight);
	185	}
	186
fd586bac KS	187	static struct class_device_attribute net_class_attributes[] = {
	188	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
	189	__ATTR(iflink, S_IRUGO, show_iflink, NULL),
	190	__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
	191	__ATTR(features, S_IRUGO, show_features, NULL),
	192	__ATTR(type, S_IRUGO, show_type, NULL),
	193	__ATTR(address, S_IRUGO, show_address, NULL),
	194	__ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
	195	__ATTR(carrier, S_IRUGO, show_carrier, NULL),
	196	__ATTR(mtu, S_IRUGO \| S_IWUSR, show_mtu, store_mtu),
	197	__ATTR(flags, S_IRUGO \| S_IWUSR, show_flags, store_flags),
	198	__ATTR(tx_queue_len, S_IRUGO \| S_IWUSR, show_tx_queue_len,
	199	store_tx_queue_len),
	200	__ATTR(weight, S_IRUGO \| S_IWUSR, show_weight, store_weight),
	201	{}
1da177e4 LT	202	};
	203
	204	/* Show a given an attribute in the statistics group */
	205	static ssize_t netstat_show(const struct class_device cd, char buf,
	206	unsigned long offset)
	207	{
	208	struct net_device *dev = to_net_dev(cd);
	209	struct net_device_stats *stats;
	210	ssize_t ret = -EINVAL;
	211
	212	if (offset > sizeof(struct net_device_stats) \|\|
	213	offset % sizeof(unsigned long) != 0)
	214	WARN_ON(1);
	215
	216	read_lock(&dev_base_lock);
	217	if (dev_isalive(dev) && dev->get_stats &&
	218	(stats = (*dev->get_stats)(dev)))
	219	ret = sprintf(buf, fmt_ulong,
	220	(unsigned long )(((u8 *) stats) + offset));
	221
	222	read_unlock(&dev_base_lock);
	223	return ret;
	224	}
	225
	226	/* generate a read-only statistics attribute */
	227	#define NETSTAT_ENTRY(name) \
	228	static ssize_t show_##name(struct class_device cd, char buf) \
	229	{ \
	230	return netstat_show(cd, buf, \
	231	offsetof(struct net_device_stats, name)); \
	232	} \
	233	static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
	234
	235	NETSTAT_ENTRY(rx_packets);
	236	NETSTAT_ENTRY(tx_packets);
	237	NETSTAT_ENTRY(rx_bytes);
	238	NETSTAT_ENTRY(tx_bytes);
	239	NETSTAT_ENTRY(rx_errors);
	240	NETSTAT_ENTRY(tx_errors);
	241	NETSTAT_ENTRY(rx_dropped);
	242	NETSTAT_ENTRY(tx_dropped);
	243	NETSTAT_ENTRY(multicast);
	244	NETSTAT_ENTRY(collisions);
	245	NETSTAT_ENTRY(rx_length_errors);
	246	NETSTAT_ENTRY(rx_over_errors);
	247	NETSTAT_ENTRY(rx_crc_errors);
	248	NETSTAT_ENTRY(rx_frame_errors);
	249	NETSTAT_ENTRY(rx_fifo_errors);
	250	NETSTAT_ENTRY(rx_missed_errors);
	251	NETSTAT_ENTRY(tx_aborted_errors);
	252	NETSTAT_ENTRY(tx_carrier_errors);
	253	NETSTAT_ENTRY(tx_fifo_errors);
	254	NETSTAT_ENTRY(tx_heartbeat_errors);
	255	NETSTAT_ENTRY(tx_window_errors);
	256	NETSTAT_ENTRY(rx_compressed);
	257	NETSTAT_ENTRY(tx_compressed);
	258
	259	static struct attribute *netstat_attrs[] = {
	260	&class_device_attr_rx_packets.attr,
	261	&class_device_attr_tx_packets.attr,
	262	&class_device_attr_rx_bytes.attr,
	263	&class_device_attr_tx_bytes.attr,
	264	&class_device_attr_rx_errors.attr,
	265	&class_device_attr_tx_errors.attr,
266	&class_device_attr_rx_dropped.attr,
267	&class_device_attr_tx_dropped.attr,
268	&class_device_attr_multicast.attr,
269	&class_device_attr_collisions.attr,
270	&class_device_attr_rx_length_errors.attr,
271	&class_device_attr_rx_over_errors.attr,
272	&class_device_attr_rx_crc_errors.attr,
273	&class_device_attr_rx_frame_errors.attr,
274	&class_device_attr_rx_fifo_errors.attr,
275	&class_device_attr_rx_missed_errors.attr,
276	&class_device_attr_tx_aborted_errors.attr,
277	&class_device_attr_tx_carrier_errors.attr,
278	&class_device_attr_tx_fifo_errors.attr,
279	&class_device_attr_tx_heartbeat_errors.attr,
280	&class_device_attr_tx_window_errors.attr,
281	&class_device_attr_rx_compressed.attr,
282	&class_device_attr_tx_compressed.attr,
283	NULL
284	};
285
286
287	static struct attribute_group netstat_group = {
288	.name = "statistics",
289	.attrs = netstat_attrs,
290	};
291
292	#ifdef WIRELESS_EXT
293	/* helper function that does all the locking etc for wireless stats */
294	static ssize_t wireless_show(struct class_device cd, char buf,
295	ssize_t (format)(const struct iw_statistics ,
296	char *))
297	{
298	struct net_device *dev = to_net_dev(cd);
6dd214b5	299	const struct iw_statistics *iw = NULL;
1da177e4 LT	300	ssize_t ret = -EINVAL;
	301
	302	read_lock(&dev_base_lock);
6dd214b5 AB	303	if (dev_isalive(dev)) {
	304	if(dev->wireless_handlers &&
	305	dev->wireless_handlers->get_wireless_stats)
	306	iw = dev->wireless_handlers->get_wireless_stats(dev);
	307	else if (dev->get_wireless_stats)
	308	iw = dev->get_wireless_stats(dev);
	309	if (iw != NULL)
	310	ret = (*format)(iw, buf);
	311	}
1da177e4 LT	312	read_unlock(&dev_base_lock);
	313
	314	return ret;
	315	}
	316
	317	/* show function template for wireless fields */
	318	#define WIRELESS_SHOW(name, field, format_string) \
	319	static ssize_t format_iw_##name(const struct iw_statistics iw, char buf) \
	320	{ \
	321	return sprintf(buf, format_string, iw->field); \
	322	} \
	323	static ssize_t show_iw_##name(struct class_device cd, char buf) \
	324	{ \
	325	return wireless_show(cd, buf, format_iw_##name); \
	326	} \
	327	static CLASS_DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
	328
	329	WIRELESS_SHOW(status, status, fmt_hex);
	330	WIRELESS_SHOW(link, qual.qual, fmt_dec);
	331	WIRELESS_SHOW(level, qual.level, fmt_dec);
	332	WIRELESS_SHOW(noise, qual.noise, fmt_dec);
	333	WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
	334	WIRELESS_SHOW(crypt, discard.code, fmt_dec);
	335	WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
	336	WIRELESS_SHOW(misc, discard.misc, fmt_dec);
	337	WIRELESS_SHOW(retries, discard.retries, fmt_dec);
	338	WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
	339
	340	static struct attribute *wireless_attrs[] = {
	341	&class_device_attr_status.attr,
	342	&class_device_attr_link.attr,
	343	&class_device_attr_level.attr,
	344	&class_device_attr_noise.attr,
	345	&class_device_attr_nwid.attr,
	346	&class_device_attr_crypt.attr,
	347	&class_device_attr_fragment.attr,
	348	&class_device_attr_retries.attr,
	349	&class_device_attr_misc.attr,
	350	&class_device_attr_beacon.attr,
	351	NULL
	352	};
	353
	354	static struct attribute_group wireless_group = {
	355	.name = "wireless",
	356	.attrs = wireless_attrs,
	357	};
	358	#endif
	359
	360	#ifdef CONFIG_HOTPLUG
312c004d KS	361	static int netdev_uevent(struct class_device cd, char *envp,
312c004d KS	362	int num_envp, char *buf, int size)
1da177e4 LT	363	{
	364	struct net_device *dev = to_net_dev(cd);
	365	int i = 0;
	366	int n;
	367
312c004d	368	/* pass interface to uevent. */
1da177e4 LT	369	envp[i++] = buf;
	370	n = snprintf(buf, size, "INTERFACE=%s", dev->name) + 1;
	371	buf += n;
	372	size -= n;
	373
	374	if ((size <= 0) \|\| (i >= num_envp))
	375	return -ENOMEM;
	376
	377	envp[i] = NULL;
	378	return 0;
	379	}
	380	#endif
	381
	382	/*
	383	* netdev_release -- destroy and free a dead device.
	384	* Called when last reference to class_device kobject is gone.
	385	*/
	386	static void netdev_release(struct class_device *cd)
	387	{
	388	struct net_device *dev
	389	= container_of(cd, struct net_device, class_dev);
	390
	391	BUG_ON(dev->reg_state != NETREG_RELEASED);
	392
	393	kfree((char *)dev - dev->padded);
	394	}
	395
	396	static struct class net_class = {
	397	.name = "net",
	398	.release = netdev_release,
fd586bac	399	.class_dev_attrs = net_class_attributes,
1da177e4	400	#ifdef CONFIG_HOTPLUG
312c004d	401	.uevent = netdev_uevent,
1da177e4 LT	402	#endif
	403	};
	404
	405	void netdev_unregister_sysfs(struct net_device * net)
	406	{
	407	struct class_device * class_dev = &(net->class_dev);
	408
	409	if (net->get_stats)
	410	sysfs_remove_group(&class_dev->kobj, &netstat_group);
	411
	412	#ifdef WIRELESS_EXT
6dd214b5 AB	413	if (net->get_wireless_stats \|\| (net->wireless_handlers &&
6dd214b5 AB	414	net->wireless_handlers->get_wireless_stats))
1da177e4 LT	415	sysfs_remove_group(&class_dev->kobj, &wireless_group);
	416	#endif
	417	class_device_del(class_dev);
	418
	419	}
	420
	421	/* Create sysfs entries for network device. */
	422	int netdev_register_sysfs(struct net_device *net)
	423	{
	424	struct class_device *class_dev = &(net->class_dev);
1da177e4 LT	425	int ret;
	426
	427	class_dev->class = &net_class;
	428	class_dev->class_data = net;
	429
	430	strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
	431	if ((ret = class_device_register(class_dev)))
	432	goto out;
	433
1da177e4 LT	434	if (net->get_stats &&
	435	(ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
	436	goto out_unreg;
	437
	438	#ifdef WIRELESS_EXT
6dd214b5 AB	439	if (net->get_wireless_stats \|\| (net->wireless_handlers &&
	440	net->wireless_handlers->get_wireless_stats)) {
	441	ret = sysfs_create_group(&class_dev->kobj, &wireless_group);
	442	if (ret)
	443	goto out_cleanup;
	444	}
1da177e4 LT	445	return 0;
	446	out_cleanup:
	447	if (net->get_stats)
	448	sysfs_remove_group(&class_dev->kobj, &netstat_group);
	449	#else
	450	return 0;
	451	#endif
	452
	453	out_unreg:
	454	printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n",
	455	net->name, ret);
	456	class_device_unregister(class_dev);
	457	out:
	458	return ret;
	459	}
	460
	461	int netdev_sysfs_init(void)
	462	{
	463	return class_register(&net_class);
	464	}