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