[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/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>

#include "net-sysfs.h"

#ifdef CONFIG_SYSFS
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 device *dev,
			   struct device_attribute *attr, char *buf,
			   ssize_t (*format)(const struct net_device *, char *))
{
	struct net_device *net = to_net_dev(dev);
	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 device *dev,				\
			    struct device_attribute *attr, char *buf)	\
{									\
	return netdev_show(dev, attr, buf, format_##field);		\
}


/* use same locking and permission rules as SIF* ioctl's */
static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
			    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 device *dev, struct device_attribute *attr,
			    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 device *dev,
			    struct device_attribute *attr, 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 device *dev,
			    struct device_attribute *attr, 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 device *dev,
			    struct device_attribute *attr, 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 device *dev,
			      struct device_attribute *attr, 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 >= ARRAY_SIZE(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 device *dev, struct device_attribute *attr,
			 const char *buf, size_t len)
{
	return netdev_store(dev, attr, 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 device *dev, struct device_attribute *attr,
			   const char *buf, size_t len)
{
	return netdev_store(dev, attr, 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 device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t len)
{
	return netdev_store(dev, attr, buf, len, change_tx_queue_len);
}

static struct 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),
	{}
};

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

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

	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 device *d,				\
			   struct device_attribute *attr, char *buf) 	\
{									\
	return netstat_show(d, attr, buf,				\
			    offsetof(struct net_device_stats, name));	\
}									\
static 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[] = {
	&dev_attr_rx_packets.attr,
	&dev_attr_tx_packets.attr,
	&dev_attr_rx_bytes.attr,
	&dev_attr_tx_bytes.attr,
	&dev_attr_rx_errors.attr,
	&dev_attr_tx_errors.attr,
	&dev_attr_rx_dropped.attr,
	&dev_attr_tx_dropped.attr,
	&dev_attr_multicast.attr,
	&dev_attr_collisions.attr,
	&dev_attr_rx_length_errors.attr,
	&dev_attr_rx_over_errors.attr,
	&dev_attr_rx_crc_errors.attr,
	&dev_attr_rx_frame_errors.attr,
	&dev_attr_rx_fifo_errors.attr,
	&dev_attr_rx_missed_errors.attr,
	&dev_attr_tx_aborted_errors.attr,
	&dev_attr_tx_carrier_errors.attr,
	&dev_attr_tx_fifo_errors.attr,
	&dev_attr_tx_heartbeat_errors.attr,
	&dev_attr_tx_window_errors.attr,
	&dev_attr_rx_compressed.attr,
	&dev_attr_tx_compressed.attr,
	NULL
};


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

#ifdef CONFIG_WIRELESS_EXT
/* helper function that does all the locking etc for wireless stats */
static ssize_t wireless_show(struct device *d, char *buf,
			     ssize_t (*format)(const struct iw_statistics *,
					       char *))
{
	struct net_device *dev = to_net_dev(d);
	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);
		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 device *d,				\
			      struct device_attribute *attr, char *buf)	\
{									\
	return wireless_show(d, buf, format_iw_##name);			\
}									\
static 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[] = {
	&dev_attr_status.attr,
	&dev_attr_link.attr,
	&dev_attr_level.attr,
	&dev_attr_noise.attr,
	&dev_attr_nwid.attr,
	&dev_attr_crypt.attr,
	&dev_attr_fragment.attr,
	&dev_attr_retries.attr,
	&dev_attr_misc.attr,
	&dev_attr_beacon.attr,
	NULL
};

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

#endif /* CONFIG_SYSFS */

#ifdef CONFIG_HOTPLUG
static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
{
	struct net_device *dev = to_net_dev(d);
	int retval;

	/* pass interface to uevent. */
	retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
	if (retval)
		goto exit;

	/* pass ifindex to uevent.
	 * ifindex is useful as it won't change (interface name may change)
	 * and is what RtNetlink uses natively. */
	retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);

exit:
	return retval;
}
#endif

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

	BUG_ON(dev->reg_state != NETREG_RELEASED);

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

static struct class net_class = {
	.name = "net",
	.dev_release = netdev_release,
#ifdef CONFIG_SYSFS
	.dev_attrs = net_class_attributes,
#endif /* CONFIG_SYSFS */
#ifdef CONFIG_HOTPLUG
	.dev_uevent = netdev_uevent,
#endif
};

/* Delete sysfs entries but hold kobject reference until after all
 * netdev references are gone.
 */
void netdev_unregister_kobject(struct net_device * net)
{
	struct device *dev = &(net->dev);

	kobject_get(&dev->kobj);
	device_del(dev);
}

/* Create sysfs entries for network device. */
int netdev_register_kobject(struct net_device *net)
{
	struct device *dev = &(net->dev);
	struct attribute_group **groups = net->sysfs_groups;

	device_initialize(dev);
	dev->class = &net_class;
	dev->platform_data = net;
	dev->groups = groups;

	BUILD_BUG_ON(BUS_ID_SIZE < IFNAMSIZ);
	strlcpy(dev->bus_id, net->name, BUS_ID_SIZE);

#ifdef CONFIG_SYSFS
	if (net->get_stats)
		*groups++ = &netstat_group;

#ifdef CONFIG_WIRELESS_EXT
	if (net->wireless_handlers && net->wireless_handlers->get_wireless_stats)
		*groups++ = &wireless_group;
#endif
#endif /* CONFIG_SYSFS */

	return device_add(dev);
}

int netdev_kobject_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>
4ec93edb	5	*
1da177e4 LT	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/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	20
342709ef PE	21	#include "net-sysfs.h"
342709ef PE	22
8b41d188	23	#ifdef CONFIG_SYSFS
1da177e4	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
4ec93edb	29	static inline int dev_isalive(const struct net_device *dev)
1da177e4	30	{
fe9925b5	31	return dev->reg_state <= NETREG_REGISTERED;
1da177e4 LT	32	}
	33
	34	/* use same locking rules as GIF* ioctl's */
43cb76d9 GKH	35	static ssize_t netdev_show(const struct device *dev,
43cb76d9 GKH	36	struct device_attribute attr, char buf,
1da177e4 LT	37	ssize_t (format)(const struct net_device , char *))
1da177e4 LT	38	{
43cb76d9	39	struct net_device *net = to_net_dev(dev);
1da177e4 LT	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	} \
43cb76d9 GKH	56	static ssize_t show_##field(struct device *dev, \
43cb76d9 GKH	57	struct device_attribute attr, char buf) \
1da177e4	58	{ \
43cb76d9	59	return netdev_show(dev, attr, buf, format_##field); \
1da177e4 LT	60	}
	61
	62
	63	/* use same locking and permission rules as SIF* ioctl's */
43cb76d9	64	static ssize_t netdev_store(struct device dev, struct device_attribute attr,
1da177e4 LT	65	const char *buf, size_t len,
	66	int (set)(struct net_device , unsigned long))
	67	{
	68	struct net_device *net = to_net_dev(dev);
	69	char *endp;
	70	unsigned long new;
	71	int ret = -EINVAL;
	72
	73	if (!capable(CAP_NET_ADMIN))
	74	return -EPERM;
	75
	76	new = simple_strtoul(buf, &endp, 0);
	77	if (endp == buf)
	78	goto err;
	79
	80	rtnl_lock();
	81	if (dev_isalive(net)) {
	82	if ((ret = (*set)(net, new)) == 0)
	83	ret = len;
	84	}
	85	rtnl_unlock();
	86	err:
	87	return ret;
	88	}
	89
fd586bac KS	90	NETDEVICE_SHOW(addr_len, fmt_dec);
	91	NETDEVICE_SHOW(iflink, fmt_dec);
	92	NETDEVICE_SHOW(ifindex, fmt_dec);
	93	NETDEVICE_SHOW(features, fmt_long_hex);
	94	NETDEVICE_SHOW(type, fmt_dec);
b00055aa	95	NETDEVICE_SHOW(link_mode, fmt_dec);
1da177e4 LT	96
	97	/* use same locking rules as GIFHWADDR ioctl's */
	98	static ssize_t format_addr(char buf, const unsigned char addr, int len)
	99	{
	100	int i;
	101	char *cp = buf;
	102
	103	for (i = 0; i < len; i++)
	104	cp += sprintf(cp, "%02x%c", addr[i],
	105	i == (len - 1) ? '\n' : ':');
	106	return cp - buf;
	107	}
	108
43cb76d9 GKH	109	static ssize_t show_address(struct device dev, struct device_attribute attr,
43cb76d9 GKH	110	char *buf)
1da177e4 LT	111	{
	112	struct net_device *net = to_net_dev(dev);
	113	ssize_t ret = -EINVAL;
	114
	115	read_lock(&dev_base_lock);
	116	if (dev_isalive(net))
	117	ret = format_addr(buf, net->dev_addr, net->addr_len);
	118	read_unlock(&dev_base_lock);
	119	return ret;
	120	}
	121
43cb76d9 GKH	122	static ssize_t show_broadcast(struct device *dev,
43cb76d9 GKH	123	struct device_attribute attr, char buf)
1da177e4 LT	124	{
	125	struct net_device *net = to_net_dev(dev);
	126	if (dev_isalive(net))
	127	return format_addr(buf, net->broadcast, net->addr_len);
	128	return -EINVAL;
	129	}
	130
43cb76d9 GKH	131	static ssize_t show_carrier(struct device *dev,
43cb76d9 GKH	132	struct device_attribute attr, char buf)
1da177e4 LT	133	{
	134	struct net_device *netdev = to_net_dev(dev);
	135	if (netif_running(netdev)) {
	136	return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
	137	}
	138	return -EINVAL;
	139	}
	140
43cb76d9 GKH	141	static ssize_t show_dormant(struct device *dev,
43cb76d9 GKH	142	struct device_attribute attr, char buf)
b00055aa SR	143	{
	144	struct net_device *netdev = to_net_dev(dev);
	145
	146	if (netif_running(netdev))
	147	return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
	148
	149	return -EINVAL;
	150	}
	151
	152	static const char *operstates[] = {
	153	"unknown",
	154	"notpresent", /* currently unused */
	155	"down",
	156	"lowerlayerdown",
	157	"testing", /* currently unused */
	158	"dormant",
	159	"up"
	160	};
	161
43cb76d9 GKH	162	static ssize_t show_operstate(struct device *dev,
43cb76d9 GKH	163	struct device_attribute attr, char buf)
b00055aa SR	164	{
	165	const struct net_device *netdev = to_net_dev(dev);
	166	unsigned char operstate;
	167
	168	read_lock(&dev_base_lock);
	169	operstate = netdev->operstate;
	170	if (!netif_running(netdev))
	171	operstate = IF_OPER_DOWN;
	172	read_unlock(&dev_base_lock);
	173
e3a5cd9e	174	if (operstate >= ARRAY_SIZE(operstates))
b00055aa SR	175	return -EINVAL; /* should not happen */
	176
	177	return sprintf(buf, "%s\n", operstates[operstate]);
	178	}
	179
1da177e4 LT	180	/* read-write attributes */
	181	NETDEVICE_SHOW(mtu, fmt_dec);
	182
	183	static int change_mtu(struct net_device *net, unsigned long new_mtu)
	184	{
	185	return dev_set_mtu(net, (int) new_mtu);
	186	}
	187
43cb76d9 GKH	188	static ssize_t store_mtu(struct device dev, struct device_attribute attr,
43cb76d9 GKH	189	const char *buf, size_t len)
1da177e4	190	{
43cb76d9	191	return netdev_store(dev, attr, buf, len, change_mtu);
1da177e4 LT	192	}
1da177e4 LT	193
1da177e4 LT	194	NETDEVICE_SHOW(flags, fmt_hex);
	195
	196	static int change_flags(struct net_device *net, unsigned long new_flags)
	197	{
	198	return dev_change_flags(net, (unsigned) new_flags);
	199	}
	200
43cb76d9 GKH	201	static ssize_t store_flags(struct device dev, struct device_attribute attr,
43cb76d9 GKH	202	const char *buf, size_t len)
1da177e4	203	{
43cb76d9	204	return netdev_store(dev, attr, buf, len, change_flags);
1da177e4 LT	205	}
1da177e4 LT	206
1da177e4 LT	207	NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
	208
	209	static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
	210	{
	211	net->tx_queue_len = new_len;
	212	return 0;
	213	}
	214
43cb76d9 GKH	215	static ssize_t store_tx_queue_len(struct device *dev,
	216	struct device_attribute *attr,
	217	const char *buf, size_t len)
1da177e4	218	{
43cb76d9	219	return netdev_store(dev, attr, buf, len, change_tx_queue_len);
1da177e4 LT	220	}
1da177e4 LT	221
43cb76d9	222	static struct device_attribute net_class_attributes[] = {
fd586bac KS	223	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
	224	__ATTR(iflink, S_IRUGO, show_iflink, NULL),
	225	__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
	226	__ATTR(features, S_IRUGO, show_features, NULL),
	227	__ATTR(type, S_IRUGO, show_type, NULL),
b00055aa	228	__ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
fd586bac KS	229	__ATTR(address, S_IRUGO, show_address, NULL),
	230	__ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
	231	__ATTR(carrier, S_IRUGO, show_carrier, NULL),
b00055aa SR	232	__ATTR(dormant, S_IRUGO, show_dormant, NULL),
b00055aa SR	233	__ATTR(operstate, S_IRUGO, show_operstate, NULL),
fd586bac KS	234	__ATTR(mtu, S_IRUGO \| S_IWUSR, show_mtu, store_mtu),
	235	__ATTR(flags, S_IRUGO \| S_IWUSR, show_flags, store_flags),
	236	__ATTR(tx_queue_len, S_IRUGO \| S_IWUSR, show_tx_queue_len,
	237	store_tx_queue_len),
fd586bac	238	{}
1da177e4 LT	239	};
	240
	241	/* Show a given an attribute in the statistics group */
43cb76d9 GKH	242	static ssize_t netstat_show(const struct device *d,
43cb76d9 GKH	243	struct device_attribute attr, char buf,
1da177e4 LT	244	unsigned long offset)
1da177e4 LT	245	{
43cb76d9	246	struct net_device *dev = to_net_dev(d);
1da177e4 LT	247	struct net_device_stats *stats;
	248	ssize_t ret = -EINVAL;
	249
df1b86c5 PE	250	WARN_ON(offset > sizeof(struct net_device_stats) \|\|
df1b86c5 PE	251	offset % sizeof(unsigned long) != 0);
1da177e4 LT	252
	253	read_lock(&dev_base_lock);
	254	if (dev_isalive(dev) && dev->get_stats &&
4ec93edb	255	(stats = (*dev->get_stats)(dev)))
1da177e4 LT	256	ret = sprintf(buf, fmt_ulong,
	257	(unsigned long )(((u8 *) stats) + offset));
	258
	259	read_unlock(&dev_base_lock);
	260	return ret;
	261	}
	262
	263	/* generate a read-only statistics attribute */
	264	#define NETSTAT_ENTRY(name) \
43cb76d9 GKH	265	static ssize_t show_##name(struct device *d, \
43cb76d9 GKH	266	struct device_attribute attr, char buf) \
1da177e4	267	{ \
43cb76d9	268	return netstat_show(d, attr, buf, \
1da177e4 LT	269	offsetof(struct net_device_stats, name)); \
1da177e4 LT	270	} \
43cb76d9	271	static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
1da177e4 LT	272
	273	NETSTAT_ENTRY(rx_packets);
	274	NETSTAT_ENTRY(tx_packets);
	275	NETSTAT_ENTRY(rx_bytes);
	276	NETSTAT_ENTRY(tx_bytes);
	277	NETSTAT_ENTRY(rx_errors);
	278	NETSTAT_ENTRY(tx_errors);
	279	NETSTAT_ENTRY(rx_dropped);
	280	NETSTAT_ENTRY(tx_dropped);
	281	NETSTAT_ENTRY(multicast);
	282	NETSTAT_ENTRY(collisions);
	283	NETSTAT_ENTRY(rx_length_errors);
	284	NETSTAT_ENTRY(rx_over_errors);
	285	NETSTAT_ENTRY(rx_crc_errors);
	286	NETSTAT_ENTRY(rx_frame_errors);
	287	NETSTAT_ENTRY(rx_fifo_errors);
	288	NETSTAT_ENTRY(rx_missed_errors);
	289	NETSTAT_ENTRY(tx_aborted_errors);
	290	NETSTAT_ENTRY(tx_carrier_errors);
	291	NETSTAT_ENTRY(tx_fifo_errors);
	292	NETSTAT_ENTRY(tx_heartbeat_errors);
	293	NETSTAT_ENTRY(tx_window_errors);
	294	NETSTAT_ENTRY(rx_compressed);
	295	NETSTAT_ENTRY(tx_compressed);
	296
	297	static struct attribute *netstat_attrs[] = {
43cb76d9 GKH	298	&dev_attr_rx_packets.attr,
	299	&dev_attr_tx_packets.attr,
	300	&dev_attr_rx_bytes.attr,
	301	&dev_attr_tx_bytes.attr,
	302	&dev_attr_rx_errors.attr,
	303	&dev_attr_tx_errors.attr,
	304	&dev_attr_rx_dropped.attr,
	305	&dev_attr_tx_dropped.attr,
	306	&dev_attr_multicast.attr,
	307	&dev_attr_collisions.attr,
	308	&dev_attr_rx_length_errors.attr,
	309	&dev_attr_rx_over_errors.attr,
	310	&dev_attr_rx_crc_errors.attr,
	311	&dev_attr_rx_frame_errors.attr,
	312	&dev_attr_rx_fifo_errors.attr,
	313	&dev_attr_rx_missed_errors.attr,
	314	&dev_attr_tx_aborted_errors.attr,
	315	&dev_attr_tx_carrier_errors.attr,
	316	&dev_attr_tx_fifo_errors.attr,
	317	&dev_attr_tx_heartbeat_errors.attr,
	318	&dev_attr_tx_window_errors.attr,
	319	&dev_attr_rx_compressed.attr,
	320	&dev_attr_tx_compressed.attr,
1da177e4 LT	321	NULL
	322	};
	323
	324
	325	static struct attribute_group netstat_group = {
	326	.name = "statistics",
	327	.attrs = netstat_attrs,
	328	};
	329
9d4a6040	330	#ifdef CONFIG_WIRELESS_EXT
1da177e4	331	/* helper function that does all the locking etc for wireless stats */
43cb76d9	332	static ssize_t wireless_show(struct device d, char buf,
1da177e4 LT	333	ssize_t (format)(const struct iw_statistics ,
	334	char *))
	335	{
43cb76d9	336	struct net_device *dev = to_net_dev(d);
6dd214b5	337	const struct iw_statistics *iw = NULL;
1da177e4	338	ssize_t ret = -EINVAL;
4ec93edb	339
1da177e4	340	read_lock(&dev_base_lock);
6dd214b5	341	if (dev_isalive(dev)) {
e71a4783 SH	342	if (dev->wireless_handlers &&
e71a4783 SH	343	dev->wireless_handlers->get_wireless_stats)
6dd214b5	344	iw = dev->wireless_handlers->get_wireless_stats(dev);
6dd214b5 AB	345	if (iw != NULL)
	346	ret = (*format)(iw, buf);
	347	}
1da177e4 LT	348	read_unlock(&dev_base_lock);
	349
	350	return ret;
	351	}
	352
	353	/* show function template for wireless fields */
	354	#define WIRELESS_SHOW(name, field, format_string) \
	355	static ssize_t format_iw_##name(const struct iw_statistics iw, char buf) \
	356	{ \
	357	return sprintf(buf, format_string, iw->field); \
	358	} \
43cb76d9 GKH	359	static ssize_t show_iw_##name(struct device *d, \
43cb76d9 GKH	360	struct device_attribute attr, char buf) \
1da177e4	361	{ \
43cb76d9	362	return wireless_show(d, buf, format_iw_##name); \
1da177e4	363	} \
43cb76d9	364	static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
1da177e4 LT	365
	366	WIRELESS_SHOW(status, status, fmt_hex);
	367	WIRELESS_SHOW(link, qual.qual, fmt_dec);
	368	WIRELESS_SHOW(level, qual.level, fmt_dec);
	369	WIRELESS_SHOW(noise, qual.noise, fmt_dec);
	370	WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
	371	WIRELESS_SHOW(crypt, discard.code, fmt_dec);
	372	WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
	373	WIRELESS_SHOW(misc, discard.misc, fmt_dec);
	374	WIRELESS_SHOW(retries, discard.retries, fmt_dec);
	375	WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
	376
	377	static struct attribute *wireless_attrs[] = {
43cb76d9 GKH	378	&dev_attr_status.attr,
	379	&dev_attr_link.attr,
	380	&dev_attr_level.attr,
	381	&dev_attr_noise.attr,
	382	&dev_attr_nwid.attr,
	383	&dev_attr_crypt.attr,
	384	&dev_attr_fragment.attr,
	385	&dev_attr_retries.attr,
	386	&dev_attr_misc.attr,
	387	&dev_attr_beacon.attr,
1da177e4 LT	388	NULL
	389	};
	390
	391	static struct attribute_group wireless_group = {
	392	.name = "wireless",
	393	.attrs = wireless_attrs,
	394	};
	395	#endif
	396
8b41d188 EB	397	#endif /* CONFIG_SYSFS */
8b41d188 EB	398
1da177e4	399	#ifdef CONFIG_HOTPLUG
7eff2e7a	400	static int netdev_uevent(struct device d, struct kobj_uevent_env env)
1da177e4	401	{
43cb76d9	402	struct net_device *dev = to_net_dev(d);
7eff2e7a	403	int retval;
1da177e4	404
312c004d	405	/* pass interface to uevent. */
7eff2e7a	406	retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
bf62456e ER	407	if (retval)
bf62456e ER	408	goto exit;
ca2f37db JT	409
	410	/* pass ifindex to uevent.
	411	* ifindex is useful as it won't change (interface name may change)
	412	* and is what RtNetlink uses natively. */
7eff2e7a	413	retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1da177e4	414
bf62456e	415	exit:
bf62456e	416	return retval;
1da177e4 LT	417	}
	418	#endif
	419
	420	/*
4ec93edb	421	* netdev_release -- destroy and free a dead device.
43cb76d9	422	* Called when last reference to device kobject is gone.
1da177e4	423	*/
43cb76d9	424	static void netdev_release(struct device *d)
1da177e4	425	{
43cb76d9	426	struct net_device *dev = to_net_dev(d);
1da177e4 LT	427
	428	BUG_ON(dev->reg_state != NETREG_RELEASED);
	429
	430	kfree((char *)dev - dev->padded);
	431	}
	432
	433	static struct class net_class = {
	434	.name = "net",
43cb76d9	435	.dev_release = netdev_release,
8b41d188	436	#ifdef CONFIG_SYSFS
43cb76d9	437	.dev_attrs = net_class_attributes,
8b41d188	438	#endif /* CONFIG_SYSFS */
1da177e4	439	#ifdef CONFIG_HOTPLUG
43cb76d9	440	.dev_uevent = netdev_uevent,
1da177e4 LT	441	#endif
	442	};
	443
9093bbb2 SH	444	/* Delete sysfs entries but hold kobject reference until after all
	445	* netdev references are gone.
	446	*/
8b41d188	447	void netdev_unregister_kobject(struct net_device * net)
1da177e4	448	{
9093bbb2 SH	449	struct device *dev = &(net->dev);
	450
	451	kobject_get(&dev->kobj);
	452	device_del(dev);
1da177e4 LT	453	}
	454
	455	/* Create sysfs entries for network device. */
8b41d188	456	int netdev_register_kobject(struct net_device *net)
1da177e4	457	{
43cb76d9	458	struct device *dev = &(net->dev);
fe9925b5	459	struct attribute_group **groups = net->sysfs_groups;
1da177e4	460
43cb76d9 GKH	461	device_initialize(dev);
	462	dev->class = &net_class;
	463	dev->platform_data = net;
	464	dev->groups = groups;
1da177e4	465
fe9925b5	466	BUILD_BUG_ON(BUS_ID_SIZE < IFNAMSIZ);
43cb76d9	467	strlcpy(dev->bus_id, net->name, BUS_ID_SIZE);
1da177e4	468
8b41d188	469	#ifdef CONFIG_SYSFS
fe9925b5 SH	470	if (net->get_stats)
fe9925b5 SH	471	*groups++ = &netstat_group;
1da177e4	472
9d4a6040	473	#ifdef CONFIG_WIRELESS_EXT
baef1865	474	if (net->wireless_handlers && net->wireless_handlers->get_wireless_stats)
fe9925b5	475	*groups++ = &wireless_group;
1da177e4	476	#endif
8b41d188	477	#endif /* CONFIG_SYSFS */
1da177e4	478
43cb76d9	479	return device_add(dev);
1da177e4 LT	480	}
1da177e4 LT	481
8b41d188	482	int netdev_kobject_init(void)
1da177e4 LT	483	{
	484	return class_register(&net_class);
	485	}