[linux-block.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>

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

#ifdef CONFIG_HOTPLUG
static int netdev_uevent(struct device *d, char **envp,
			 int num_envp, char *buf, int size)
{
	struct net_device *dev = to_net_dev(d);
	int retval, len = 0, i = 0;

	/* pass interface to uevent. */
	retval = add_uevent_var(envp, num_envp, &i,
				buf, size, &len,
				"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(envp, num_envp, &i,
				buf, size, &len,
				"IFINDEX=%d", dev->ifindex);

exit:
	envp[i] = NULL;
	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,
	.dev_attrs = net_class_attributes,
#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_sysfs(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_sysfs(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);

	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

	return device_add(dev);
}

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>
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
1da177e4	21	static const char fmt_hex[] = "%#x\n";
d1102b59	22	static const char fmt_long_hex[] = "%#lx\n";
1da177e4 LT	23	static const char fmt_dec[] = "%d\n";
	24	static const char fmt_ulong[] = "%lu\n";
	25
4ec93edb	26	static inline int dev_isalive(const struct net_device *dev)
1da177e4	27	{
fe9925b5	28	return dev->reg_state <= NETREG_REGISTERED;
1da177e4 LT	29	}
	30
	31	/* use same locking rules as GIF* ioctl's */
43cb76d9 GKH	32	static ssize_t netdev_show(const struct device *dev,
43cb76d9 GKH	33	struct device_attribute attr, char buf,
1da177e4 LT	34	ssize_t (format)(const struct net_device , char *))
1da177e4 LT	35	{
43cb76d9	36	struct net_device *net = to_net_dev(dev);
1da177e4 LT	37	ssize_t ret = -EINVAL;
	38
	39	read_lock(&dev_base_lock);
	40	if (dev_isalive(net))
	41	ret = (*format)(net, buf);
	42	read_unlock(&dev_base_lock);
	43
	44	return ret;
	45	}
	46
	47	/* generate a show function for simple field */
	48	#define NETDEVICE_SHOW(field, format_string) \
	49	static ssize_t format_##field(const struct net_device net, char buf) \
	50	{ \
	51	return sprintf(buf, format_string, net->field); \
	52	} \
43cb76d9 GKH	53	static ssize_t show_##field(struct device *dev, \
43cb76d9 GKH	54	struct device_attribute attr, char buf) \
1da177e4	55	{ \
43cb76d9	56	return netdev_show(dev, attr, buf, format_##field); \
1da177e4 LT	57	}
	58
	59
	60	/* use same locking and permission rules as SIF* ioctl's */
43cb76d9	61	static ssize_t netdev_store(struct device dev, struct device_attribute attr,
1da177e4 LT	62	const char *buf, size_t len,
	63	int (set)(struct net_device , unsigned long))
	64	{
	65	struct net_device *net = to_net_dev(dev);
	66	char *endp;
	67	unsigned long new;
	68	int ret = -EINVAL;
	69
	70	if (!capable(CAP_NET_ADMIN))
	71	return -EPERM;
	72
	73	new = simple_strtoul(buf, &endp, 0);
	74	if (endp == buf)
	75	goto err;
	76
	77	rtnl_lock();
	78	if (dev_isalive(net)) {
	79	if ((ret = (*set)(net, new)) == 0)
	80	ret = len;
	81	}
	82	rtnl_unlock();
	83	err:
	84	return ret;
	85	}
	86
fd586bac KS	87	NETDEVICE_SHOW(addr_len, fmt_dec);
	88	NETDEVICE_SHOW(iflink, fmt_dec);
	89	NETDEVICE_SHOW(ifindex, fmt_dec);
	90	NETDEVICE_SHOW(features, fmt_long_hex);
	91	NETDEVICE_SHOW(type, fmt_dec);
b00055aa	92	NETDEVICE_SHOW(link_mode, 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
43cb76d9 GKH	106	static ssize_t show_address(struct device dev, struct device_attribute attr,
43cb76d9 GKH	107	char *buf)
1da177e4 LT	108	{
	109	struct net_device *net = to_net_dev(dev);
	110	ssize_t ret = -EINVAL;
	111
	112	read_lock(&dev_base_lock);
	113	if (dev_isalive(net))
	114	ret = format_addr(buf, net->dev_addr, net->addr_len);
	115	read_unlock(&dev_base_lock);
	116	return ret;
	117	}
	118
43cb76d9 GKH	119	static ssize_t show_broadcast(struct device *dev,
43cb76d9 GKH	120	struct device_attribute attr, char buf)
1da177e4 LT	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
43cb76d9 GKH	128	static ssize_t show_carrier(struct device *dev,
43cb76d9 GKH	129	struct device_attribute attr, char buf)
1da177e4 LT	130	{
	131	struct net_device *netdev = to_net_dev(dev);
	132	if (netif_running(netdev)) {
	133	return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
	134	}
	135	return -EINVAL;
	136	}
	137
43cb76d9 GKH	138	static ssize_t show_dormant(struct device *dev,
43cb76d9 GKH	139	struct device_attribute attr, char buf)
b00055aa SR	140	{
	141	struct net_device *netdev = to_net_dev(dev);
	142
	143	if (netif_running(netdev))
	144	return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
	145
	146	return -EINVAL;
	147	}
	148
	149	static const char *operstates[] = {
	150	"unknown",
	151	"notpresent", /* currently unused */
	152	"down",
	153	"lowerlayerdown",
	154	"testing", /* currently unused */
	155	"dormant",
	156	"up"
	157	};
	158
43cb76d9 GKH	159	static ssize_t show_operstate(struct device *dev,
43cb76d9 GKH	160	struct device_attribute attr, char buf)
b00055aa SR	161	{
	162	const struct net_device *netdev = to_net_dev(dev);
	163	unsigned char operstate;
	164
	165	read_lock(&dev_base_lock);
	166	operstate = netdev->operstate;
	167	if (!netif_running(netdev))
	168	operstate = IF_OPER_DOWN;
	169	read_unlock(&dev_base_lock);
	170
e3a5cd9e	171	if (operstate >= ARRAY_SIZE(operstates))
b00055aa SR	172	return -EINVAL; /* should not happen */
	173
	174	return sprintf(buf, "%s\n", operstates[operstate]);
	175	}
	176
1da177e4 LT	177	/* read-write attributes */
	178	NETDEVICE_SHOW(mtu, fmt_dec);
	179
	180	static int change_mtu(struct net_device *net, unsigned long new_mtu)
	181	{
	182	return dev_set_mtu(net, (int) new_mtu);
	183	}
	184
43cb76d9 GKH	185	static ssize_t store_mtu(struct device dev, struct device_attribute attr,
43cb76d9 GKH	186	const char *buf, size_t len)
1da177e4	187	{
43cb76d9	188	return netdev_store(dev, attr, buf, len, change_mtu);
1da177e4 LT	189	}
1da177e4 LT	190
1da177e4 LT	191	NETDEVICE_SHOW(flags, fmt_hex);
	192
	193	static int change_flags(struct net_device *net, unsigned long new_flags)
	194	{
	195	return dev_change_flags(net, (unsigned) new_flags);
	196	}
	197
43cb76d9 GKH	198	static ssize_t store_flags(struct device dev, struct device_attribute attr,
43cb76d9 GKH	199	const char *buf, size_t len)
1da177e4	200	{
43cb76d9	201	return netdev_store(dev, attr, buf, len, change_flags);
1da177e4 LT	202	}
1da177e4 LT	203
1da177e4 LT	204	NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
	205
	206	static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
	207	{
	208	net->tx_queue_len = new_len;
	209	return 0;
	210	}
	211
43cb76d9 GKH	212	static ssize_t store_tx_queue_len(struct device *dev,
	213	struct device_attribute *attr,
	214	const char *buf, size_t len)
1da177e4	215	{
43cb76d9	216	return netdev_store(dev, attr, buf, len, change_tx_queue_len);
1da177e4 LT	217	}
1da177e4 LT	218
43cb76d9	219	static struct device_attribute net_class_attributes[] = {
fd586bac KS	220	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
	221	__ATTR(iflink, S_IRUGO, show_iflink, NULL),
	222	__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
	223	__ATTR(features, S_IRUGO, show_features, NULL),
	224	__ATTR(type, S_IRUGO, show_type, NULL),
b00055aa	225	__ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
fd586bac KS	226	__ATTR(address, S_IRUGO, show_address, NULL),
	227	__ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
	228	__ATTR(carrier, S_IRUGO, show_carrier, NULL),
b00055aa SR	229	__ATTR(dormant, S_IRUGO, show_dormant, NULL),
b00055aa SR	230	__ATTR(operstate, S_IRUGO, show_operstate, NULL),
fd586bac KS	231	__ATTR(mtu, S_IRUGO \| S_IWUSR, show_mtu, store_mtu),
	232	__ATTR(flags, S_IRUGO \| S_IWUSR, show_flags, store_flags),
	233	__ATTR(tx_queue_len, S_IRUGO \| S_IWUSR, show_tx_queue_len,
	234	store_tx_queue_len),
fd586bac	235	{}
1da177e4 LT	236	};
	237
	238	/* Show a given an attribute in the statistics group */
43cb76d9 GKH	239	static ssize_t netstat_show(const struct device *d,
43cb76d9 GKH	240	struct device_attribute attr, char buf,
1da177e4 LT	241	unsigned long offset)
1da177e4 LT	242	{
43cb76d9	243	struct net_device *dev = to_net_dev(d);
1da177e4 LT	244	struct net_device_stats *stats;
	245	ssize_t ret = -EINVAL;
	246
	247	if (offset > sizeof(struct net_device_stats) \|\|
	248	offset % sizeof(unsigned long) != 0)
	249	WARN_ON(1);
	250
	251	read_lock(&dev_base_lock);
	252	if (dev_isalive(dev) && dev->get_stats &&
4ec93edb	253	(stats = (*dev->get_stats)(dev)))
1da177e4 LT	254	ret = sprintf(buf, fmt_ulong,
	255	(unsigned long )(((u8 *) stats) + offset));
	256
	257	read_unlock(&dev_base_lock);
	258	return ret;
	259	}
	260
	261	/* generate a read-only statistics attribute */
	262	#define NETSTAT_ENTRY(name) \
43cb76d9 GKH	263	static ssize_t show_##name(struct device *d, \
43cb76d9 GKH	264	struct device_attribute attr, char buf) \
1da177e4	265	{ \
43cb76d9	266	return netstat_show(d, attr, buf, \
1da177e4 LT	267	offsetof(struct net_device_stats, name)); \
1da177e4 LT	268	} \
43cb76d9	269	static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
1da177e4 LT	270
	271	NETSTAT_ENTRY(rx_packets);
	272	NETSTAT_ENTRY(tx_packets);
	273	NETSTAT_ENTRY(rx_bytes);
	274	NETSTAT_ENTRY(tx_bytes);
	275	NETSTAT_ENTRY(rx_errors);
	276	NETSTAT_ENTRY(tx_errors);
	277	NETSTAT_ENTRY(rx_dropped);
	278	NETSTAT_ENTRY(tx_dropped);
	279	NETSTAT_ENTRY(multicast);
	280	NETSTAT_ENTRY(collisions);
	281	NETSTAT_ENTRY(rx_length_errors);
	282	NETSTAT_ENTRY(rx_over_errors);
	283	NETSTAT_ENTRY(rx_crc_errors);
	284	NETSTAT_ENTRY(rx_frame_errors);
	285	NETSTAT_ENTRY(rx_fifo_errors);
	286	NETSTAT_ENTRY(rx_missed_errors);
	287	NETSTAT_ENTRY(tx_aborted_errors);
	288	NETSTAT_ENTRY(tx_carrier_errors);
	289	NETSTAT_ENTRY(tx_fifo_errors);
	290	NETSTAT_ENTRY(tx_heartbeat_errors);
	291	NETSTAT_ENTRY(tx_window_errors);
	292	NETSTAT_ENTRY(rx_compressed);
	293	NETSTAT_ENTRY(tx_compressed);
	294
	295	static struct attribute *netstat_attrs[] = {
43cb76d9 GKH	296	&dev_attr_rx_packets.attr,
	297	&dev_attr_tx_packets.attr,
	298	&dev_attr_rx_bytes.attr,
	299	&dev_attr_tx_bytes.attr,
	300	&dev_attr_rx_errors.attr,
	301	&dev_attr_tx_errors.attr,
	302	&dev_attr_rx_dropped.attr,
	303	&dev_attr_tx_dropped.attr,
	304	&dev_attr_multicast.attr,
	305	&dev_attr_collisions.attr,
	306	&dev_attr_rx_length_errors.attr,
	307	&dev_attr_rx_over_errors.attr,
	308	&dev_attr_rx_crc_errors.attr,
	309	&dev_attr_rx_frame_errors.attr,
	310	&dev_attr_rx_fifo_errors.attr,
	311	&dev_attr_rx_missed_errors.attr,
	312	&dev_attr_tx_aborted_errors.attr,
	313	&dev_attr_tx_carrier_errors.attr,
	314	&dev_attr_tx_fifo_errors.attr,
	315	&dev_attr_tx_heartbeat_errors.attr,
	316	&dev_attr_tx_window_errors.attr,
	317	&dev_attr_rx_compressed.attr,
	318	&dev_attr_tx_compressed.attr,
1da177e4 LT	319	NULL
	320	};
	321
	322
	323	static struct attribute_group netstat_group = {
	324	.name = "statistics",
	325	.attrs = netstat_attrs,
	326	};
	327
9d4a6040	328	#ifdef CONFIG_WIRELESS_EXT
1da177e4	329	/* helper function that does all the locking etc for wireless stats */
43cb76d9	330	static ssize_t wireless_show(struct device d, char buf,
1da177e4 LT	331	ssize_t (format)(const struct iw_statistics ,
	332	char *))
	333	{
43cb76d9	334	struct net_device *dev = to_net_dev(d);
6dd214b5	335	const struct iw_statistics *iw = NULL;
1da177e4	336	ssize_t ret = -EINVAL;
4ec93edb	337
1da177e4	338	read_lock(&dev_base_lock);
6dd214b5	339	if (dev_isalive(dev)) {
e71a4783 SH	340	if (dev->wireless_handlers &&
e71a4783 SH	341	dev->wireless_handlers->get_wireless_stats)
6dd214b5	342	iw = dev->wireless_handlers->get_wireless_stats(dev);
6dd214b5 AB	343	if (iw != NULL)
	344	ret = (*format)(iw, buf);
	345	}
1da177e4 LT	346	read_unlock(&dev_base_lock);
	347
	348	return ret;
	349	}
	350
	351	/* show function template for wireless fields */
	352	#define WIRELESS_SHOW(name, field, format_string) \
	353	static ssize_t format_iw_##name(const struct iw_statistics iw, char buf) \
	354	{ \
	355	return sprintf(buf, format_string, iw->field); \
	356	} \
43cb76d9 GKH	357	static ssize_t show_iw_##name(struct device *d, \
43cb76d9 GKH	358	struct device_attribute attr, char buf) \
1da177e4	359	{ \
43cb76d9	360	return wireless_show(d, buf, format_iw_##name); \
1da177e4	361	} \
43cb76d9	362	static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
1da177e4 LT	363
	364	WIRELESS_SHOW(status, status, fmt_hex);
	365	WIRELESS_SHOW(link, qual.qual, fmt_dec);
	366	WIRELESS_SHOW(level, qual.level, fmt_dec);
	367	WIRELESS_SHOW(noise, qual.noise, fmt_dec);
	368	WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
	369	WIRELESS_SHOW(crypt, discard.code, fmt_dec);
	370	WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
	371	WIRELESS_SHOW(misc, discard.misc, fmt_dec);
	372	WIRELESS_SHOW(retries, discard.retries, fmt_dec);
	373	WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
	374
	375	static struct attribute *wireless_attrs[] = {
43cb76d9 GKH	376	&dev_attr_status.attr,
	377	&dev_attr_link.attr,
	378	&dev_attr_level.attr,
	379	&dev_attr_noise.attr,
	380	&dev_attr_nwid.attr,
	381	&dev_attr_crypt.attr,
	382	&dev_attr_fragment.attr,
	383	&dev_attr_retries.attr,
	384	&dev_attr_misc.attr,
	385	&dev_attr_beacon.attr,
1da177e4 LT	386	NULL
	387	};
	388
	389	static struct attribute_group wireless_group = {
	390	.name = "wireless",
	391	.attrs = wireless_attrs,
	392	};
	393	#endif
	394
	395	#ifdef CONFIG_HOTPLUG
43cb76d9	396	static int netdev_uevent(struct device d, char *envp,
312c004d	397	int num_envp, char *buf, int size)
1da177e4	398	{
43cb76d9	399	struct net_device *dev = to_net_dev(d);
bf62456e	400	int retval, len = 0, i = 0;
1da177e4	401
312c004d	402	/* pass interface to uevent. */
bf62456e ER	403	retval = add_uevent_var(envp, num_envp, &i,
	404	buf, size, &len,
	405	"INTERFACE=%s", dev->name);
	406	if (retval)
	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. */
bf62456e ER	412	retval = add_uevent_var(envp, num_envp, &i,
	413	buf, size, &len,
	414	"IFINDEX=%d", dev->ifindex);
1da177e4	415
bf62456e	416	exit:
1da177e4	417	envp[i] = NULL;
bf62456e	418	return retval;
1da177e4 LT	419	}
	420	#endif
	421
	422	/*
4ec93edb	423	* netdev_release -- destroy and free a dead device.
43cb76d9	424	* Called when last reference to device kobject is gone.
1da177e4	425	*/
43cb76d9	426	static void netdev_release(struct device *d)
1da177e4	427	{
43cb76d9	428	struct net_device *dev = to_net_dev(d);
1da177e4 LT	429
	430	BUG_ON(dev->reg_state != NETREG_RELEASED);
	431
	432	kfree((char *)dev - dev->padded);
	433	}
	434
	435	static struct class net_class = {
	436	.name = "net",
43cb76d9 GKH	437	.dev_release = netdev_release,
43cb76d9 GKH	438	.dev_attrs = net_class_attributes,
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	*/
1da177e4 LT	447	void netdev_unregister_sysfs(struct net_device * net)
1da177e4 LT	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. */
	456	int netdev_register_sysfs(struct net_device *net)
	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
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 LT	475	#endif
1da177e4 LT	476
43cb76d9	477	return device_add(dev);
1da177e4 LT	478	}
	479
	480	int netdev_sysfs_init(void)
	481	{
	482	return class_register(&net_class);
	483	}