[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>

#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;

	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 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
8b41d188	21	#ifdef CONFIG_SYSFS
1da177e4	22	static const char fmt_hex[] = "%#x\n";
d1102b59	23	static const char fmt_long_hex[] = "%#lx\n";
1da177e4 LT	24	static const char fmt_dec[] = "%d\n";
	25	static const char fmt_ulong[] = "%lu\n";
	26
4ec93edb	27	static inline int dev_isalive(const struct net_device *dev)
1da177e4	28	{
fe9925b5	29	return dev->reg_state <= NETREG_REGISTERED;
1da177e4 LT	30	}
	31
	32	/* use same locking rules as GIF* ioctl's */
43cb76d9 GKH	33	static ssize_t netdev_show(const struct device *dev,
43cb76d9 GKH	34	struct device_attribute attr, char buf,
1da177e4 LT	35	ssize_t (format)(const struct net_device , char *))
1da177e4 LT	36	{
43cb76d9	37	struct net_device *net = to_net_dev(dev);
1da177e4 LT	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	} \
43cb76d9 GKH	54	static ssize_t show_##field(struct device *dev, \
43cb76d9 GKH	55	struct device_attribute attr, char buf) \
1da177e4	56	{ \
43cb76d9	57	return netdev_show(dev, attr, buf, format_##field); \
1da177e4 LT	58	}
	59
	60
	61	/* use same locking and permission rules as SIF* ioctl's */
43cb76d9	62	static ssize_t netdev_store(struct device dev, struct device_attribute attr,
1da177e4 LT	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);
b00055aa	93	NETDEVICE_SHOW(link_mode, fmt_dec);
1da177e4 LT	94
	95	/* use same locking rules as GIFHWADDR ioctl's */
	96	static ssize_t format_addr(char buf, const unsigned char addr, int len)
	97	{
	98	int i;
	99	char *cp = buf;
	100
	101	for (i = 0; i < len; i++)
	102	cp += sprintf(cp, "%02x%c", addr[i],
	103	i == (len - 1) ? '\n' : ':');
	104	return cp - buf;
	105	}
	106
43cb76d9 GKH	107	static ssize_t show_address(struct device dev, struct device_attribute attr,
43cb76d9 GKH	108	char *buf)
1da177e4 LT	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
43cb76d9 GKH	120	static ssize_t show_broadcast(struct device *dev,
43cb76d9 GKH	121	struct device_attribute attr, char buf)
1da177e4 LT	122	{
	123	struct net_device *net = to_net_dev(dev);
	124	if (dev_isalive(net))
	125	return format_addr(buf, net->broadcast, net->addr_len);
	126	return -EINVAL;
	127	}
	128
43cb76d9 GKH	129	static ssize_t show_carrier(struct device *dev,
43cb76d9 GKH	130	struct device_attribute attr, char buf)
1da177e4 LT	131	{
	132	struct net_device *netdev = to_net_dev(dev);
	133	if (netif_running(netdev)) {
	134	return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
	135	}
	136	return -EINVAL;
	137	}
	138
43cb76d9 GKH	139	static ssize_t show_dormant(struct device *dev,
43cb76d9 GKH	140	struct device_attribute attr, char buf)
b00055aa SR	141	{
	142	struct net_device *netdev = to_net_dev(dev);
	143
	144	if (netif_running(netdev))
	145	return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
	146
	147	return -EINVAL;
	148	}
	149
	150	static const char *operstates[] = {
	151	"unknown",
	152	"notpresent", /* currently unused */
	153	"down",
	154	"lowerlayerdown",
	155	"testing", /* currently unused */
	156	"dormant",
	157	"up"
	158	};
	159
43cb76d9 GKH	160	static ssize_t show_operstate(struct device *dev,
43cb76d9 GKH	161	struct device_attribute attr, char buf)
b00055aa SR	162	{
	163	const struct net_device *netdev = to_net_dev(dev);
	164	unsigned char operstate;
	165
	166	read_lock(&dev_base_lock);
	167	operstate = netdev->operstate;
	168	if (!netif_running(netdev))
	169	operstate = IF_OPER_DOWN;
	170	read_unlock(&dev_base_lock);
	171
e3a5cd9e	172	if (operstate >= ARRAY_SIZE(operstates))
b00055aa SR	173	return -EINVAL; /* should not happen */
	174
	175	return sprintf(buf, "%s\n", operstates[operstate]);
	176	}
	177
1da177e4 LT	178	/* read-write attributes */
	179	NETDEVICE_SHOW(mtu, fmt_dec);
	180
	181	static int change_mtu(struct net_device *net, unsigned long new_mtu)
	182	{
	183	return dev_set_mtu(net, (int) new_mtu);
	184	}
	185
43cb76d9 GKH	186	static ssize_t store_mtu(struct device dev, struct device_attribute attr,
43cb76d9 GKH	187	const char *buf, size_t len)
1da177e4	188	{
43cb76d9	189	return netdev_store(dev, attr, buf, len, change_mtu);
1da177e4 LT	190	}
1da177e4 LT	191
1da177e4 LT	192	NETDEVICE_SHOW(flags, fmt_hex);
	193
	194	static int change_flags(struct net_device *net, unsigned long new_flags)
	195	{
	196	return dev_change_flags(net, (unsigned) new_flags);
	197	}
	198
43cb76d9 GKH	199	static ssize_t store_flags(struct device dev, struct device_attribute attr,
43cb76d9 GKH	200	const char *buf, size_t len)
1da177e4	201	{
43cb76d9	202	return netdev_store(dev, attr, buf, len, change_flags);
1da177e4 LT	203	}
1da177e4 LT	204
1da177e4 LT	205	NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
	206
	207	static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
	208	{
	209	net->tx_queue_len = new_len;
	210	return 0;
	211	}
	212
43cb76d9 GKH	213	static ssize_t store_tx_queue_len(struct device *dev,
	214	struct device_attribute *attr,
	215	const char *buf, size_t len)
1da177e4	216	{
43cb76d9	217	return netdev_store(dev, attr, buf, len, change_tx_queue_len);
1da177e4 LT	218	}
1da177e4 LT	219
43cb76d9	220	static struct device_attribute net_class_attributes[] = {
fd586bac KS	221	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
	222	__ATTR(iflink, S_IRUGO, show_iflink, NULL),
	223	__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
	224	__ATTR(features, S_IRUGO, show_features, NULL),
	225	__ATTR(type, S_IRUGO, show_type, NULL),
b00055aa	226	__ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
fd586bac KS	227	__ATTR(address, S_IRUGO, show_address, NULL),
	228	__ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
	229	__ATTR(carrier, S_IRUGO, show_carrier, NULL),
b00055aa SR	230	__ATTR(dormant, S_IRUGO, show_dormant, NULL),
b00055aa SR	231	__ATTR(operstate, S_IRUGO, show_operstate, NULL),
fd586bac KS	232	__ATTR(mtu, S_IRUGO \| S_IWUSR, show_mtu, store_mtu),
	233	__ATTR(flags, S_IRUGO \| S_IWUSR, show_flags, store_flags),
	234	__ATTR(tx_queue_len, S_IRUGO \| S_IWUSR, show_tx_queue_len,
	235	store_tx_queue_len),
fd586bac	236	{}
1da177e4 LT	237	};
	238
	239	/* Show a given an attribute in the statistics group */
43cb76d9 GKH	240	static ssize_t netstat_show(const struct device *d,
43cb76d9 GKH	241	struct device_attribute attr, char buf,
1da177e4 LT	242	unsigned long offset)
1da177e4 LT	243	{
43cb76d9	244	struct net_device *dev = to_net_dev(d);
1da177e4 LT	245	struct net_device_stats *stats;
	246	ssize_t ret = -EINVAL;
	247
	248	if (offset > sizeof(struct net_device_stats) \|\|
	249	offset % sizeof(unsigned long) != 0)
	250	WARN_ON(1);
	251
	252	read_lock(&dev_base_lock);
	253	if (dev_isalive(dev) && dev->get_stats &&
4ec93edb	254	(stats = (*dev->get_stats)(dev)))
1da177e4 LT	255	ret = sprintf(buf, fmt_ulong,
	256	(unsigned long )(((u8 *) stats) + offset));
	257
	258	read_unlock(&dev_base_lock);
	259	return ret;
	260	}
	261
	262	/* generate a read-only statistics attribute */
	263	#define NETSTAT_ENTRY(name) \
43cb76d9 GKH	264	static ssize_t show_##name(struct device *d, \
43cb76d9 GKH	265	struct device_attribute attr, char buf) \
1da177e4	266	{ \
43cb76d9	267	return netstat_show(d, attr, buf, \
1da177e4 LT	268	offsetof(struct net_device_stats, name)); \
1da177e4 LT	269	} \
43cb76d9	270	static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
1da177e4 LT	271
	272	NETSTAT_ENTRY(rx_packets);
	273	NETSTAT_ENTRY(tx_packets);
	274	NETSTAT_ENTRY(rx_bytes);
	275	NETSTAT_ENTRY(tx_bytes);
	276	NETSTAT_ENTRY(rx_errors);
	277	NETSTAT_ENTRY(tx_errors);
	278	NETSTAT_ENTRY(rx_dropped);
	279	NETSTAT_ENTRY(tx_dropped);
	280	NETSTAT_ENTRY(multicast);
	281	NETSTAT_ENTRY(collisions);
	282	NETSTAT_ENTRY(rx_length_errors);
	283	NETSTAT_ENTRY(rx_over_errors);
	284	NETSTAT_ENTRY(rx_crc_errors);
	285	NETSTAT_ENTRY(rx_frame_errors);
	286	NETSTAT_ENTRY(rx_fifo_errors);
	287	NETSTAT_ENTRY(rx_missed_errors);
	288	NETSTAT_ENTRY(tx_aborted_errors);
	289	NETSTAT_ENTRY(tx_carrier_errors);
	290	NETSTAT_ENTRY(tx_fifo_errors);
	291	NETSTAT_ENTRY(tx_heartbeat_errors);
	292	NETSTAT_ENTRY(tx_window_errors);
	293	NETSTAT_ENTRY(rx_compressed);
	294	NETSTAT_ENTRY(tx_compressed);
	295
	296	static struct attribute *netstat_attrs[] = {
43cb76d9 GKH	297	&dev_attr_rx_packets.attr,
	298	&dev_attr_tx_packets.attr,
	299	&dev_attr_rx_bytes.attr,
	300	&dev_attr_tx_bytes.attr,
	301	&dev_attr_rx_errors.attr,
	302	&dev_attr_tx_errors.attr,
	303	&dev_attr_rx_dropped.attr,
	304	&dev_attr_tx_dropped.attr,
	305	&dev_attr_multicast.attr,
	306	&dev_attr_collisions.attr,
	307	&dev_attr_rx_length_errors.attr,
	308	&dev_attr_rx_over_errors.attr,
	309	&dev_attr_rx_crc_errors.attr,
	310	&dev_attr_rx_frame_errors.attr,
	311	&dev_attr_rx_fifo_errors.attr,
	312	&dev_attr_rx_missed_errors.attr,
	313	&dev_attr_tx_aborted_errors.attr,
	314	&dev_attr_tx_carrier_errors.attr,
	315	&dev_attr_tx_fifo_errors.attr,
	316	&dev_attr_tx_heartbeat_errors.attr,
	317	&dev_attr_tx_window_errors.attr,
	318	&dev_attr_rx_compressed.attr,
	319	&dev_attr_tx_compressed.attr,
1da177e4 LT	320	NULL
	321	};
	322
	323
	324	static struct attribute_group netstat_group = {
	325	.name = "statistics",
	326	.attrs = netstat_attrs,
	327	};
	328
9d4a6040	329	#ifdef CONFIG_WIRELESS_EXT
1da177e4	330	/* helper function that does all the locking etc for wireless stats */
43cb76d9	331	static ssize_t wireless_show(struct device d, char buf,
1da177e4 LT	332	ssize_t (format)(const struct iw_statistics ,
	333	char *))
	334	{
43cb76d9	335	struct net_device *dev = to_net_dev(d);
6dd214b5	336	const struct iw_statistics *iw = NULL;
1da177e4	337	ssize_t ret = -EINVAL;
4ec93edb	338
1da177e4	339	read_lock(&dev_base_lock);
6dd214b5	340	if (dev_isalive(dev)) {
e71a4783 SH	341	if (dev->wireless_handlers &&
e71a4783 SH	342	dev->wireless_handlers->get_wireless_stats)
6dd214b5	343	iw = dev->wireless_handlers->get_wireless_stats(dev);
6dd214b5 AB	344	if (iw != NULL)
	345	ret = (*format)(iw, buf);
	346	}
1da177e4 LT	347	read_unlock(&dev_base_lock);
	348
	349	return ret;
	350	}
	351
	352	/* show function template for wireless fields */
	353	#define WIRELESS_SHOW(name, field, format_string) \
	354	static ssize_t format_iw_##name(const struct iw_statistics iw, char buf) \
	355	{ \
	356	return sprintf(buf, format_string, iw->field); \
	357	} \
43cb76d9 GKH	358	static ssize_t show_iw_##name(struct device *d, \
43cb76d9 GKH	359	struct device_attribute attr, char buf) \
1da177e4	360	{ \
43cb76d9	361	return wireless_show(d, buf, format_iw_##name); \
1da177e4	362	} \
43cb76d9	363	static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
1da177e4 LT	364
	365	WIRELESS_SHOW(status, status, fmt_hex);
	366	WIRELESS_SHOW(link, qual.qual, fmt_dec);
	367	WIRELESS_SHOW(level, qual.level, fmt_dec);
	368	WIRELESS_SHOW(noise, qual.noise, fmt_dec);
	369	WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
	370	WIRELESS_SHOW(crypt, discard.code, fmt_dec);
	371	WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
	372	WIRELESS_SHOW(misc, discard.misc, fmt_dec);
	373	WIRELESS_SHOW(retries, discard.retries, fmt_dec);
	374	WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
	375
	376	static struct attribute *wireless_attrs[] = {
43cb76d9 GKH	377	&dev_attr_status.attr,
	378	&dev_attr_link.attr,
	379	&dev_attr_level.attr,
	380	&dev_attr_noise.attr,
	381	&dev_attr_nwid.attr,
	382	&dev_attr_crypt.attr,
	383	&dev_attr_fragment.attr,
	384	&dev_attr_retries.attr,
	385	&dev_attr_misc.attr,
	386	&dev_attr_beacon.attr,
1da177e4 LT	387	NULL
	388	};
	389
	390	static struct attribute_group wireless_group = {
	391	.name = "wireless",
	392	.attrs = wireless_attrs,
	393	};
	394	#endif
	395
8b41d188 EB	396	#endif /* CONFIG_SYSFS */
8b41d188 EB	397
1da177e4	398	#ifdef CONFIG_HOTPLUG
7eff2e7a	399	static int netdev_uevent(struct device d, struct kobj_uevent_env env)
1da177e4	400	{
43cb76d9	401	struct net_device *dev = to_net_dev(d);
7eff2e7a	402	int retval;
1da177e4	403
312c004d	404	/* pass interface to uevent. */
7eff2e7a	405	retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
bf62456e ER	406	if (retval)
bf62456e ER	407	goto exit;
ca2f37db JT	408
	409	/* pass ifindex to uevent.
	410	* ifindex is useful as it won't change (interface name may change)
	411	* and is what RtNetlink uses natively. */
7eff2e7a	412	retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1da177e4	413
bf62456e	414	exit:
bf62456e	415	return retval;
1da177e4 LT	416	}
	417	#endif
	418
	419	/*
4ec93edb	420	* netdev_release -- destroy and free a dead device.
43cb76d9	421	* Called when last reference to device kobject is gone.
1da177e4	422	*/
43cb76d9	423	static void netdev_release(struct device *d)
1da177e4	424	{
43cb76d9	425	struct net_device *dev = to_net_dev(d);
1da177e4 LT	426
	427	BUG_ON(dev->reg_state != NETREG_RELEASED);
	428
	429	kfree((char *)dev - dev->padded);
	430	}
	431
	432	static struct class net_class = {
	433	.name = "net",
43cb76d9	434	.dev_release = netdev_release,
8b41d188	435	#ifdef CONFIG_SYSFS
43cb76d9	436	.dev_attrs = net_class_attributes,
8b41d188	437	#endif /* CONFIG_SYSFS */
1da177e4	438	#ifdef CONFIG_HOTPLUG
43cb76d9	439	.dev_uevent = netdev_uevent,
1da177e4 LT	440	#endif
	441	};
	442
9093bbb2 SH	443	/* Delete sysfs entries but hold kobject reference until after all
	444	* netdev references are gone.
	445	*/
8b41d188	446	void netdev_unregister_kobject(struct net_device * net)
1da177e4	447	{
9093bbb2 SH	448	struct device *dev = &(net->dev);
	449
	450	kobject_get(&dev->kobj);
	451	device_del(dev);
1da177e4 LT	452	}
	453
	454	/* Create sysfs entries for network device. */
8b41d188	455	int netdev_register_kobject(struct net_device *net)
1da177e4	456	{
43cb76d9	457	struct device *dev = &(net->dev);
fe9925b5	458	struct attribute_group **groups = net->sysfs_groups;
1da177e4	459
43cb76d9 GKH	460	device_initialize(dev);
	461	dev->class = &net_class;
	462	dev->platform_data = net;
	463	dev->groups = groups;
1da177e4	464
fe9925b5	465	BUILD_BUG_ON(BUS_ID_SIZE < IFNAMSIZ);
43cb76d9	466	strlcpy(dev->bus_id, net->name, BUS_ID_SIZE);
1da177e4	467
8b41d188	468	#ifdef CONFIG_SYSFS
fe9925b5 SH	469	if (net->get_stats)
fe9925b5 SH	470	*groups++ = &netstat_group;
1da177e4	471
9d4a6040	472	#ifdef CONFIG_WIRELESS_EXT
baef1865	473	if (net->wireless_handlers && net->wireless_handlers->get_wireless_stats)
fe9925b5	474	*groups++ = &wireless_group;
1da177e4	475	#endif
8b41d188	476	#endif /* CONFIG_SYSFS */
1da177e4	477
43cb76d9	478	return device_add(dev);
1da177e4 LT	479	}
1da177e4 LT	480
8b41d188	481	int netdev_kobject_init(void)
1da177e4 LT	482	{
	483	return class_register(&net_class);
	484	}