[linux.git] / net / core / net-sysfs.c

/*
 * net-sysfs.c - network device class and attributes
 *
 * Copyright (c) 2003 Stephen Hemminger <[email protected]>
 * 
 *	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);
NETDEVICE_SHOW(link_mode, 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;
}

static ssize_t show_dormant(struct class_device *dev, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);

	if (netif_running(netdev))
		return sprintf(buf, fmt_dec, !!netif_dormant(netdev));

	return -EINVAL;
}

static const char *operstates[] = {
	"unknown",
	"notpresent", /* currently unused */
	"down",
	"lowerlayerdown",
	"testing", /* currently unused */
	"dormant",
	"up"
};

static ssize_t show_operstate(struct class_device *dev, char *buf)
{
	const struct net_device *netdev = to_net_dev(dev);
	unsigned char operstate;

	read_lock(&dev_base_lock);
	operstate = netdev->operstate;
	if (!netif_running(netdev))
		operstate = IF_OPER_DOWN;
	read_unlock(&dev_base_lock);

	if (operstate >= sizeof(operstates))
		return -EINVAL; /* should not happen */

	return sprintf(buf, "%s\n", operstates[operstate]);
}

/* 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(link_mode, S_IRUGO, show_link_mode, NULL),
	__ATTR(address, S_IRUGO, show_address, NULL),
	__ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
	__ATTR(carrier, S_IRUGO, show_carrier, NULL),
	__ATTR(dormant, S_IRUGO, show_dormant, NULL),
	__ATTR(operstate, S_IRUGO, show_operstate, 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 <[email protected]>
	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);
b00055aa	94	NETDEVICE_SHOW(link_mode, fmt_dec);
1da177e4 LT	95
	96	/* use same locking rules as GIFHWADDR ioctl's */
	97	static ssize_t format_addr(char buf, const unsigned char addr, int len)
	98	{
	99	int i;
	100	char *cp = buf;
	101
	102	for (i = 0; i < len; i++)
	103	cp += sprintf(cp, "%02x%c", addr[i],
	104	i == (len - 1) ? '\n' : ':');
	105	return cp - buf;
	106	}
	107
	108	static ssize_t show_address(struct class_device dev, char buf)
	109	{
	110	struct net_device *net = to_net_dev(dev);
	111	ssize_t ret = -EINVAL;
	112
	113	read_lock(&dev_base_lock);
	114	if (dev_isalive(net))
	115	ret = format_addr(buf, net->dev_addr, net->addr_len);
	116	read_unlock(&dev_base_lock);
	117	return ret;
	118	}
	119
	120	static ssize_t show_broadcast(struct class_device dev, char buf)
	121	{
	122	struct net_device *net = to_net_dev(dev);
	123	if (dev_isalive(net))
	124	return format_addr(buf, net->broadcast, net->addr_len);
	125	return -EINVAL;
	126	}
	127
	128	static ssize_t show_carrier(struct class_device dev, char buf)
	129	{
	130	struct net_device *netdev = to_net_dev(dev);
	131	if (netif_running(netdev)) {
	132	return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
	133	}
	134	return -EINVAL;
	135	}
	136
b00055aa SR	137	static ssize_t show_dormant(struct class_device dev, char buf)
	138	{
	139	struct net_device *netdev = to_net_dev(dev);
	140
	141	if (netif_running(netdev))
	142	return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
	143
	144	return -EINVAL;
	145	}
	146
	147	static const char *operstates[] = {
	148	"unknown",
	149	"notpresent", /* currently unused */
	150	"down",
	151	"lowerlayerdown",
	152	"testing", /* currently unused */
	153	"dormant",
	154	"up"
	155	};
	156
	157	static ssize_t show_operstate(struct class_device dev, char buf)
	158	{
	159	const struct net_device *netdev = to_net_dev(dev);
	160	unsigned char operstate;
	161
	162	read_lock(&dev_base_lock);
	163	operstate = netdev->operstate;
	164	if (!netif_running(netdev))
	165	operstate = IF_OPER_DOWN;
	166	read_unlock(&dev_base_lock);
	167
	168	if (operstate >= sizeof(operstates))
	169	return -EINVAL; /* should not happen */
	170
	171	return sprintf(buf, "%s\n", operstates[operstate]);
	172	}
	173
1da177e4 LT	174	/* read-write attributes */
	175	NETDEVICE_SHOW(mtu, fmt_dec);
	176
	177	static int change_mtu(struct net_device *net, unsigned long new_mtu)
	178	{
	179	return dev_set_mtu(net, (int) new_mtu);
	180	}
	181
	182	static ssize_t store_mtu(struct class_device dev, const char buf, size_t len)
	183	{
	184	return netdev_store(dev, buf, len, change_mtu);
	185	}
	186
1da177e4 LT	187	NETDEVICE_SHOW(flags, fmt_hex);
	188
	189	static int change_flags(struct net_device *net, unsigned long new_flags)
	190	{
	191	return dev_change_flags(net, (unsigned) new_flags);
	192	}
	193
	194	static ssize_t store_flags(struct class_device dev, const char buf, size_t len)
	195	{
	196	return netdev_store(dev, buf, len, change_flags);
	197	}
	198
1da177e4 LT	199	NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
	200
	201	static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
	202	{
	203	net->tx_queue_len = new_len;
	204	return 0;
	205	}
	206
	207	static ssize_t store_tx_queue_len(struct class_device dev, const char buf, size_t len)
	208	{
	209	return netdev_store(dev, buf, len, change_tx_queue_len);
	210	}
	211
699a4114 SH	212	NETDEVICE_SHOW(weight, fmt_dec);
	213
	214	static int change_weight(struct net_device *net, unsigned long new_weight)
	215	{
	216	net->weight = new_weight;
	217	return 0;
	218	}
	219
	220	static ssize_t store_weight(struct class_device dev, const char buf, size_t len)
	221	{
	222	return netdev_store(dev, buf, len, change_weight);
	223	}
	224
fd586bac KS	225	static struct class_device_attribute net_class_attributes[] = {
	226	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
	227	__ATTR(iflink, S_IRUGO, show_iflink, NULL),
	228	__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
	229	__ATTR(features, S_IRUGO, show_features, NULL),
	230	__ATTR(type, S_IRUGO, show_type, NULL),
b00055aa	231	__ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
fd586bac KS	232	__ATTR(address, S_IRUGO, show_address, NULL),
	233	__ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
	234	__ATTR(carrier, S_IRUGO, show_carrier, NULL),
b00055aa SR	235	__ATTR(dormant, S_IRUGO, show_dormant, NULL),
b00055aa SR	236	__ATTR(operstate, S_IRUGO, show_operstate, NULL),
fd586bac KS	237	__ATTR(mtu, S_IRUGO \| S_IWUSR, show_mtu, store_mtu),
	238	__ATTR(flags, S_IRUGO \| S_IWUSR, show_flags, store_flags),
	239	__ATTR(tx_queue_len, S_IRUGO \| S_IWUSR, show_tx_queue_len,
	240	store_tx_queue_len),
	241	__ATTR(weight, S_IRUGO \| S_IWUSR, show_weight, store_weight),
	242	{}
1da177e4 LT	243	};
	244
	245	/* Show a given an attribute in the statistics group */
	246	static ssize_t netstat_show(const struct class_device cd, char buf,
	247	unsigned long offset)
	248	{
	249	struct net_device *dev = to_net_dev(cd);
	250	struct net_device_stats *stats;
	251	ssize_t ret = -EINVAL;
	252
	253	if (offset > sizeof(struct net_device_stats) \|\|
	254	offset % sizeof(unsigned long) != 0)
	255	WARN_ON(1);
	256
	257	read_lock(&dev_base_lock);
	258	if (dev_isalive(dev) && dev->get_stats &&
	259	(stats = (*dev->get_stats)(dev)))
	260	ret = sprintf(buf, fmt_ulong,
	261	(unsigned long )(((u8 *) stats) + offset));
	262
	263	read_unlock(&dev_base_lock);
	264	return ret;
	265	}
	266
	267	/* generate a read-only statistics attribute */
	268	#define NETSTAT_ENTRY(name) \
	269	static ssize_t show_##name(struct class_device cd, char buf) \
	270	{ \
	271	return netstat_show(cd, buf, \
	272	offsetof(struct net_device_stats, name)); \
	273	} \
	274	static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
	275
	276	NETSTAT_ENTRY(rx_packets);
	277	NETSTAT_ENTRY(tx_packets);
	278	NETSTAT_ENTRY(rx_bytes);
	279	NETSTAT_ENTRY(tx_bytes);
	280	NETSTAT_ENTRY(rx_errors);
	281	NETSTAT_ENTRY(tx_errors);
	282	NETSTAT_ENTRY(rx_dropped);
	283	NETSTAT_ENTRY(tx_dropped);
	284	NETSTAT_ENTRY(multicast);
	285	NETSTAT_ENTRY(collisions);
	286	NETSTAT_ENTRY(rx_length_errors);
	287	NETSTAT_ENTRY(rx_over_errors);
	288	NETSTAT_ENTRY(rx_crc_errors);
	289	NETSTAT_ENTRY(rx_frame_errors);
	290	NETSTAT_ENTRY(rx_fifo_errors);
	291	NETSTAT_ENTRY(rx_missed_errors);
	292	NETSTAT_ENTRY(tx_aborted_errors);
	293	NETSTAT_ENTRY(tx_carrier_errors);
	294	NETSTAT_ENTRY(tx_fifo_errors);
	295	NETSTAT_ENTRY(tx_heartbeat_errors);
	296	NETSTAT_ENTRY(tx_window_errors);
	297	NETSTAT_ENTRY(rx_compressed);
	298	NETSTAT_ENTRY(tx_compressed);
	299
	300	static struct attribute *netstat_attrs[] = {
	301	&class_device_attr_rx_packets.attr,
	302	&class_device_attr_tx_packets.attr,
	303	&class_device_attr_rx_bytes.attr,
	304	&class_device_attr_tx_bytes.attr,
	305	&class_device_attr_rx_errors.attr,
	306	&class_device_attr_tx_errors.attr,
307	&class_device_attr_rx_dropped.attr,
308	&class_device_attr_tx_dropped.attr,
309	&class_device_attr_multicast.attr,
310	&class_device_attr_collisions.attr,
311	&class_device_attr_rx_length_errors.attr,
312	&class_device_attr_rx_over_errors.attr,
313	&class_device_attr_rx_crc_errors.attr,
314	&class_device_attr_rx_frame_errors.attr,
315	&class_device_attr_rx_fifo_errors.attr,
316	&class_device_attr_rx_missed_errors.attr,
317	&class_device_attr_tx_aborted_errors.attr,
318	&class_device_attr_tx_carrier_errors.attr,
319	&class_device_attr_tx_fifo_errors.attr,
320	&class_device_attr_tx_heartbeat_errors.attr,
321	&class_device_attr_tx_window_errors.attr,
322	&class_device_attr_rx_compressed.attr,
323	&class_device_attr_tx_compressed.attr,
324	NULL
325	};
326
327
328	static struct attribute_group netstat_group = {
329	.name = "statistics",
330	.attrs = netstat_attrs,
331	};
332
333	#ifdef WIRELESS_EXT
334	/* helper function that does all the locking etc for wireless stats */
335	static ssize_t wireless_show(struct class_device cd, char buf,
336	ssize_t (format)(const struct iw_statistics ,
337	char *))
338	{
339	struct net_device *dev = to_net_dev(cd);
6dd214b5	340	const struct iw_statistics *iw = NULL;
1da177e4 LT	341	ssize_t ret = -EINVAL;
	342
	343	read_lock(&dev_base_lock);
6dd214b5 AB	344	if (dev_isalive(dev)) {
	345	if(dev->wireless_handlers &&
	346	dev->wireless_handlers->get_wireless_stats)
	347	iw = dev->wireless_handlers->get_wireless_stats(dev);
	348	else if (dev->get_wireless_stats)
	349	iw = dev->get_wireless_stats(dev);
	350	if (iw != NULL)
	351	ret = (*format)(iw, buf);
	352	}
1da177e4 LT	353	read_unlock(&dev_base_lock);
	354
	355	return ret;
	356	}
	357
	358	/* show function template for wireless fields */
	359	#define WIRELESS_SHOW(name, field, format_string) \
	360	static ssize_t format_iw_##name(const struct iw_statistics iw, char buf) \
	361	{ \
	362	return sprintf(buf, format_string, iw->field); \
	363	} \
	364	static ssize_t show_iw_##name(struct class_device cd, char buf) \
	365	{ \
	366	return wireless_show(cd, buf, format_iw_##name); \
	367	} \
	368	static CLASS_DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
	369
	370	WIRELESS_SHOW(status, status, fmt_hex);
	371	WIRELESS_SHOW(link, qual.qual, fmt_dec);
	372	WIRELESS_SHOW(level, qual.level, fmt_dec);
	373	WIRELESS_SHOW(noise, qual.noise, fmt_dec);
	374	WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
	375	WIRELESS_SHOW(crypt, discard.code, fmt_dec);
	376	WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
	377	WIRELESS_SHOW(misc, discard.misc, fmt_dec);
	378	WIRELESS_SHOW(retries, discard.retries, fmt_dec);
	379	WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
	380
	381	static struct attribute *wireless_attrs[] = {
	382	&class_device_attr_status.attr,
	383	&class_device_attr_link.attr,
	384	&class_device_attr_level.attr,
	385	&class_device_attr_noise.attr,
	386	&class_device_attr_nwid.attr,
	387	&class_device_attr_crypt.attr,
	388	&class_device_attr_fragment.attr,
	389	&class_device_attr_retries.attr,
	390	&class_device_attr_misc.attr,
	391	&class_device_attr_beacon.attr,
	392	NULL
	393	};
	394
	395	static struct attribute_group wireless_group = {
	396	.name = "wireless",
	397	.attrs = wireless_attrs,
	398	};
	399	#endif
	400
	401	#ifdef CONFIG_HOTPLUG
312c004d KS	402	static int netdev_uevent(struct class_device cd, char *envp,
312c004d KS	403	int num_envp, char *buf, int size)
1da177e4 LT	404	{
	405	struct net_device *dev = to_net_dev(cd);
	406	int i = 0;
	407	int n;
	408
312c004d	409	/* pass interface to uevent. */
1da177e4 LT	410	envp[i++] = buf;
	411	n = snprintf(buf, size, "INTERFACE=%s", dev->name) + 1;
	412	buf += n;
	413	size -= n;
	414
	415	if ((size <= 0) \|\| (i >= num_envp))
	416	return -ENOMEM;
	417
	418	envp[i] = NULL;
	419	return 0;
	420	}
	421	#endif
	422
	423	/*
	424	* netdev_release -- destroy and free a dead device.
	425	* Called when last reference to class_device kobject is gone.
	426	*/
	427	static void netdev_release(struct class_device *cd)
	428	{
	429	struct net_device *dev
	430	= container_of(cd, struct net_device, class_dev);
	431
	432	BUG_ON(dev->reg_state != NETREG_RELEASED);
	433
	434	kfree((char *)dev - dev->padded);
	435	}
	436
	437	static struct class net_class = {
	438	.name = "net",
	439	.release = netdev_release,
fd586bac	440	.class_dev_attrs = net_class_attributes,
1da177e4	441	#ifdef CONFIG_HOTPLUG
312c004d	442	.uevent = netdev_uevent,
1da177e4 LT	443	#endif
	444	};
	445
	446	void netdev_unregister_sysfs(struct net_device * net)
	447	{
	448	struct class_device * class_dev = &(net->class_dev);
	449
	450	if (net->get_stats)
	451	sysfs_remove_group(&class_dev->kobj, &netstat_group);
	452
	453	#ifdef WIRELESS_EXT
6dd214b5 AB	454	if (net->get_wireless_stats \|\| (net->wireless_handlers &&
6dd214b5 AB	455	net->wireless_handlers->get_wireless_stats))
1da177e4 LT	456	sysfs_remove_group(&class_dev->kobj, &wireless_group);
	457	#endif
	458	class_device_del(class_dev);
	459
	460	}
	461
	462	/* Create sysfs entries for network device. */
	463	int netdev_register_sysfs(struct net_device *net)
	464	{
	465	struct class_device *class_dev = &(net->class_dev);
1da177e4 LT	466	int ret;
	467
	468	class_dev->class = &net_class;
	469	class_dev->class_data = net;
	470
	471	strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
	472	if ((ret = class_device_register(class_dev)))
	473	goto out;
	474
1da177e4 LT	475	if (net->get_stats &&
	476	(ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
	477	goto out_unreg;
	478
	479	#ifdef WIRELESS_EXT
6dd214b5 AB	480	if (net->get_wireless_stats \|\| (net->wireless_handlers &&
	481	net->wireless_handlers->get_wireless_stats)) {
	482	ret = sysfs_create_group(&class_dev->kobj, &wireless_group);
	483	if (ret)
	484	goto out_cleanup;
	485	}
1da177e4 LT	486	return 0;
	487	out_cleanup:
	488	if (net->get_stats)
	489	sysfs_remove_group(&class_dev->kobj, &netstat_group);
	490	#else
	491	return 0;
	492	#endif
	493
	494	out_unreg:
	495	printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n",
	496	net->name, ret);
	497	class_device_unregister(class_dev);
	498	out:
	499	return ret;
	500	}
	501
	502	int netdev_sysfs_init(void)
	503	{
	504	return class_register(&net_class);
	505	}