[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/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>

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