[net-next-2.6.git] / net / core / net-sysfs.c

/*
 * net-sysfs.c - network device class and attributes
 *
 * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
 * 
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 */

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <net/sock.h>
#include <linux/rtnetlink.h>
#include <linux/wireless.h>

#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_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;
}

/* generate a read-only network device class attribute */
#define NETDEVICE_ATTR(field, format_string)				\
NETDEVICE_SHOW(field, format_string)					\
static CLASS_DEVICE_ATTR(field, S_IRUGO, show_##field, NULL)		\

NETDEVICE_ATTR(addr_len, fmt_dec);
NETDEVICE_ATTR(iflink, fmt_dec);
NETDEVICE_ATTR(ifindex, fmt_dec);
NETDEVICE_ATTR(features, fmt_hex);
NETDEVICE_ATTR(type, fmt_dec);

/* use same locking rules as GIFHWADDR ioctl's */
static ssize_t format_addr(char *buf, const unsigned char *addr, int len)
{
	int i;
	char *cp = buf;

	for (i = 0; i < len; i++)
		cp += sprintf(cp, "%02x%c", addr[i],
			      i == (len - 1) ? '\n' : ':');
	return cp - buf;
}

static ssize_t show_address(struct class_device *dev, char *buf)
{
	struct net_device *net = to_net_dev(dev);
	ssize_t ret = -EINVAL;

	read_lock(&dev_base_lock);
	if (dev_isalive(net))
	    ret = format_addr(buf, net->dev_addr, net->addr_len);
	read_unlock(&dev_base_lock);
	return ret;
}

static ssize_t show_broadcast(struct class_device *dev, char *buf)
{
	struct net_device *net = to_net_dev(dev);
	if (dev_isalive(net))
		return format_addr(buf, net->broadcast, net->addr_len);
	return -EINVAL;
}

static ssize_t show_carrier(struct class_device *dev, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	if (netif_running(netdev)) {
		return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
	}
	return -EINVAL;
}

static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
static CLASS_DEVICE_ATTR(broadcast, S_IRUGO, show_broadcast, NULL);
static CLASS_DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);

/* 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);
}

static CLASS_DEVICE_ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_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);
}

static CLASS_DEVICE_ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_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);
}

static CLASS_DEVICE_ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, 
			 store_tx_queue_len);


static struct class_device_attribute *net_class_attributes[] = {
	&class_device_attr_ifindex,
	&class_device_attr_iflink,
	&class_device_attr_addr_len,
	&class_device_attr_tx_queue_len,
	&class_device_attr_features,
	&class_device_attr_mtu,
	&class_device_attr_flags,
	&class_device_attr_type,
	&class_device_attr_address,
	&class_device_attr_broadcast,
	&class_device_attr_carrier,
	NULL
};

/* 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;
	ssize_t ret = -EINVAL;
	
	read_lock(&dev_base_lock);
	if (dev_isalive(dev) && dev->get_wireless_stats 
	    && (iw = dev->get_wireless_stats(dev)) != 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_hotplug(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 in env to hotplug. */
	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,
#ifdef CONFIG_HOTPLUG
	.hotplug = netdev_hotplug,
#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)
		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 i;
	struct class_device_attribute *attr;
	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;

	for (i = 0; (attr = net_class_attributes[i]) != NULL; i++) {
		if ((ret = class_device_create_file(class_dev, attr)))
		    goto out_unreg;
	}


	if (net->get_stats &&
	    (ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
		goto out_unreg; 

#ifdef WIRELESS_EXT
	if (net->get_wireless_stats &&
	    (ret = sysfs_create_group(&class_dev->kobj, &wireless_group)))
		goto out_cleanup; 

	return 0;
out_cleanup:
	if (net->get_stats)
		sysfs_remove_group(&class_dev->kobj, &netstat_group);
#else
	return 0;
#endif

out_unreg:
	printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n",
	       net->name, ret);
	class_device_unregister(class_dev);
out:
	return ret;
}

int netdev_sysfs_init(void)
{
	return class_register(&net_class);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* net-sysfs.c - network device class and attributes
	3	*
	4	* Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
	12	#include <linux/config.h>
	13	#include <linux/kernel.h>
	14	#include <linux/netdevice.h>
	15	#include <linux/if_arp.h>
	16	#include <net/sock.h>
	17	#include <linux/rtnetlink.h>
	18	#include <linux/wireless.h>
	19
	20	#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
	21	#define to_net_dev(class) container_of(class, struct net_device, class_dev)
	22
	23	static const char fmt_hex[] = "%#x\n";
	24	static const char fmt_dec[] = "%d\n";
	25	static const char fmt_ulong[] = "%lu\n";
	26
	27	static inline int dev_isalive(const struct net_device *dev)
	28	{
	29	return dev->reg_state == NETREG_REGISTERED;
	30	}
	31
	32	/* use same locking rules as GIF* ioctl's */
	33	static ssize_t netdev_show(const struct class_device cd, char buf,
	34	ssize_t (format)(const struct net_device , char *))
	35	{
	36	struct net_device *net = to_net_dev(cd);
	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	} \
	53	static ssize_t show_##field(struct class_device cd, char buf) \
	54	{ \
	55	return netdev_show(cd, buf, format_##field); \
	56	}
	57
	58
	59	/* use same locking and permission rules as SIF* ioctl's */
	60	static ssize_t netdev_store(struct class_device *dev,
	61	const char *buf, size_t len,
	62	int (set)(struct net_device , unsigned long))
	63	{
	64	struct net_device *net = to_net_dev(dev);
65	char *endp;
66	unsigned long new;
67	int ret = -EINVAL;
68
69	if (!capable(CAP_NET_ADMIN))
70	return -EPERM;
71
72	new = simple_strtoul(buf, &endp, 0);
73	if (endp == buf)
74	goto err;
75
76	rtnl_lock();
77	if (dev_isalive(net)) {
78	if ((ret = (*set)(net, new)) == 0)
79	ret = len;
80	}
81	rtnl_unlock();
82	err:
83	return ret;
84	}
85
86	/* generate a read-only network device class attribute */
87	#define NETDEVICE_ATTR(field, format_string) \
88	NETDEVICE_SHOW(field, format_string) \
89	static CLASS_DEVICE_ATTR(field, S_IRUGO, show_##field, NULL) \
90
91	NETDEVICE_ATTR(addr_len, fmt_dec);
92	NETDEVICE_ATTR(iflink, fmt_dec);
93	NETDEVICE_ATTR(ifindex, fmt_dec);
94	NETDEVICE_ATTR(features, fmt_hex);
95	NETDEVICE_ATTR(type, fmt_dec);
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
109	static ssize_t show_address(struct class_device dev, char buf)
110	{
111	struct net_device *net = to_net_dev(dev);
112	ssize_t ret = -EINVAL;
113
114	read_lock(&dev_base_lock);
115	if (dev_isalive(net))
116	ret = format_addr(buf, net->dev_addr, net->addr_len);
117	read_unlock(&dev_base_lock);
118	return ret;
119	}
120
121	static ssize_t show_broadcast(struct class_device dev, char buf)
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
129	static ssize_t show_carrier(struct class_device dev, char buf)
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
138	static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
139	static CLASS_DEVICE_ATTR(broadcast, S_IRUGO, show_broadcast, NULL);
140	static CLASS_DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
141
142	/* read-write attributes */
143	NETDEVICE_SHOW(mtu, fmt_dec);
144
145	static int change_mtu(struct net_device *net, unsigned long new_mtu)
146	{
147	return dev_set_mtu(net, (int) new_mtu);
148	}
149
150	static ssize_t store_mtu(struct class_device dev, const char buf, size_t len)
151	{
152	return netdev_store(dev, buf, len, change_mtu);
153	}
154
155	static CLASS_DEVICE_ATTR(mtu, S_IRUGO \| S_IWUSR, show_mtu, store_mtu);
156
157	NETDEVICE_SHOW(flags, fmt_hex);
158
159	static int change_flags(struct net_device *net, unsigned long new_flags)
160	{
161	return dev_change_flags(net, (unsigned) new_flags);
162	}
163
164	static ssize_t store_flags(struct class_device dev, const char buf, size_t len)
165	{
166	return netdev_store(dev, buf, len, change_flags);
167	}
168
169	static CLASS_DEVICE_ATTR(flags, S_IRUGO \| S_IWUSR, show_flags, store_flags);
170
171	NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
172
173	static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
174	{
175	net->tx_queue_len = new_len;
176	return 0;
177	}
178
179	static ssize_t store_tx_queue_len(struct class_device dev, const char buf, size_t len)
180	{
181	return netdev_store(dev, buf, len, change_tx_queue_len);
182	}
183
184	static CLASS_DEVICE_ATTR(tx_queue_len, S_IRUGO \| S_IWUSR, show_tx_queue_len,
185	store_tx_queue_len);
186
187
188	static struct class_device_attribute *net_class_attributes[] = {
189	&class_device_attr_ifindex,
190	&class_device_attr_iflink,
191	&class_device_attr_addr_len,
192	&class_device_attr_tx_queue_len,
193	&class_device_attr_features,
194	&class_device_attr_mtu,
195	&class_device_attr_flags,
196	&class_device_attr_type,
197	&class_device_attr_address,
198	&class_device_attr_broadcast,
199	&class_device_attr_carrier,
200	NULL
201	};
202
203	/* Show a given an attribute in the statistics group */
204	static ssize_t netstat_show(const struct class_device cd, char buf,
205	unsigned long offset)
206	{
207	struct net_device *dev = to_net_dev(cd);
208	struct net_device_stats *stats;
209	ssize_t ret = -EINVAL;
210
211	if (offset > sizeof(struct net_device_stats) \|\|
212	offset % sizeof(unsigned long) != 0)
213	WARN_ON(1);
214
215	read_lock(&dev_base_lock);
216	if (dev_isalive(dev) && dev->get_stats &&
217	(stats = (*dev->get_stats)(dev)))
218	ret = sprintf(buf, fmt_ulong,
219	(unsigned long )(((u8 *) stats) + offset));
220
221	read_unlock(&dev_base_lock);
222	return ret;
223	}
224
225	/* generate a read-only statistics attribute */
226	#define NETSTAT_ENTRY(name) \
227	static ssize_t show_##name(struct class_device cd, char buf) \
228	{ \
229	return netstat_show(cd, buf, \
230	offsetof(struct net_device_stats, name)); \
231	} \
232	static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
233
234	NETSTAT_ENTRY(rx_packets);
235	NETSTAT_ENTRY(tx_packets);
236	NETSTAT_ENTRY(rx_bytes);
237	NETSTAT_ENTRY(tx_bytes);
238	NETSTAT_ENTRY(rx_errors);
239	NETSTAT_ENTRY(tx_errors);
240	NETSTAT_ENTRY(rx_dropped);
241	NETSTAT_ENTRY(tx_dropped);
242	NETSTAT_ENTRY(multicast);
243	NETSTAT_ENTRY(collisions);
244	NETSTAT_ENTRY(rx_length_errors);
245	NETSTAT_ENTRY(rx_over_errors);
246	NETSTAT_ENTRY(rx_crc_errors);
247	NETSTAT_ENTRY(rx_frame_errors);
248	NETSTAT_ENTRY(rx_fifo_errors);
249	NETSTAT_ENTRY(rx_missed_errors);
250	NETSTAT_ENTRY(tx_aborted_errors);
251	NETSTAT_ENTRY(tx_carrier_errors);
252	NETSTAT_ENTRY(tx_fifo_errors);
253	NETSTAT_ENTRY(tx_heartbeat_errors);
254	NETSTAT_ENTRY(tx_window_errors);
255	NETSTAT_ENTRY(rx_compressed);
256	NETSTAT_ENTRY(tx_compressed);
257
258	static struct attribute *netstat_attrs[] = {
259	&class_device_attr_rx_packets.attr,
260	&class_device_attr_tx_packets.attr,
261	&class_device_attr_rx_bytes.attr,
262	&class_device_attr_tx_bytes.attr,
263	&class_device_attr_rx_errors.attr,
264	&class_device_attr_tx_errors.attr,
265	&class_device_attr_rx_dropped.attr,
266	&class_device_attr_tx_dropped.attr,
267	&class_device_attr_multicast.attr,
268	&class_device_attr_collisions.attr,
269	&class_device_attr_rx_length_errors.attr,
270	&class_device_attr_rx_over_errors.attr,
271	&class_device_attr_rx_crc_errors.attr,
272	&class_device_attr_rx_frame_errors.attr,
273	&class_device_attr_rx_fifo_errors.attr,
274	&class_device_attr_rx_missed_errors.attr,
275	&class_device_attr_tx_aborted_errors.attr,
276	&class_device_attr_tx_carrier_errors.attr,
277	&class_device_attr_tx_fifo_errors.attr,
278	&class_device_attr_tx_heartbeat_errors.attr,
279	&class_device_attr_tx_window_errors.attr,
280	&class_device_attr_rx_compressed.attr,
281	&class_device_attr_tx_compressed.attr,
282	NULL
283	};
284
285
286	static struct attribute_group netstat_group = {
287	.name = "statistics",
288	.attrs = netstat_attrs,
289	};
290
291	#ifdef WIRELESS_EXT
292	/* helper function that does all the locking etc for wireless stats */
293	static ssize_t wireless_show(struct class_device cd, char buf,
294	ssize_t (format)(const struct iw_statistics ,
295	char *))
296	{
297	struct net_device *dev = to_net_dev(cd);
298	const struct iw_statistics *iw;
299	ssize_t ret = -EINVAL;
300
301	read_lock(&dev_base_lock);
302	if (dev_isalive(dev) && dev->get_wireless_stats
303	&& (iw = dev->get_wireless_stats(dev)) != NULL)
304	ret = (*format)(iw, buf);
305	read_unlock(&dev_base_lock);
306
307	return ret;
308	}
309
310	/* show function template for wireless fields */
311	#define WIRELESS_SHOW(name, field, format_string) \
312	static ssize_t format_iw_##name(const struct iw_statistics iw, char buf) \
313	{ \
314	return sprintf(buf, format_string, iw->field); \
315	} \
316	static ssize_t show_iw_##name(struct class_device cd, char buf) \
317	{ \
318	return wireless_show(cd, buf, format_iw_##name); \
319	} \
320	static CLASS_DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
321
322	WIRELESS_SHOW(status, status, fmt_hex);
323	WIRELESS_SHOW(link, qual.qual, fmt_dec);
324	WIRELESS_SHOW(level, qual.level, fmt_dec);
325	WIRELESS_SHOW(noise, qual.noise, fmt_dec);
326	WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
327	WIRELESS_SHOW(crypt, discard.code, fmt_dec);
328	WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
329	WIRELESS_SHOW(misc, discard.misc, fmt_dec);
330	WIRELESS_SHOW(retries, discard.retries, fmt_dec);
331	WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
332
333	static struct attribute *wireless_attrs[] = {
334	&class_device_attr_status.attr,
335	&class_device_attr_link.attr,
336	&class_device_attr_level.attr,
337	&class_device_attr_noise.attr,
338	&class_device_attr_nwid.attr,
339	&class_device_attr_crypt.attr,
340	&class_device_attr_fragment.attr,
341	&class_device_attr_retries.attr,
342	&class_device_attr_misc.attr,
343	&class_device_attr_beacon.attr,
344	NULL
345	};
346
347	static struct attribute_group wireless_group = {
348	.name = "wireless",
349	.attrs = wireless_attrs,
350	};
351	#endif
352
353	#ifdef CONFIG_HOTPLUG
354	static int netdev_hotplug(struct class_device cd, char *envp,
355	int num_envp, char *buf, int size)
356	{
357	struct net_device *dev = to_net_dev(cd);
358	int i = 0;
359	int n;
360
361	/* pass interface in env to hotplug. */
362	envp[i++] = buf;
363	n = snprintf(buf, size, "INTERFACE=%s", dev->name) + 1;
364	buf += n;
365	size -= n;
366
367	if ((size <= 0) \|\| (i >= num_envp))
368	return -ENOMEM;
369
370	envp[i] = NULL;
371	return 0;
372	}
373	#endif
374
375	/*
376	* netdev_release -- destroy and free a dead device.
377	* Called when last reference to class_device kobject is gone.
378	*/
379	static void netdev_release(struct class_device *cd)
380	{
381	struct net_device *dev
382	= container_of(cd, struct net_device, class_dev);
383
384	BUG_ON(dev->reg_state != NETREG_RELEASED);
385
386	kfree((char *)dev - dev->padded);
387	}
388
389	static struct class net_class = {
390	.name = "net",
391	.release = netdev_release,
392	#ifdef CONFIG_HOTPLUG
393	.hotplug = netdev_hotplug,
394	#endif
395	};
396
397	void netdev_unregister_sysfs(struct net_device * net)
398	{
399	struct class_device * class_dev = &(net->class_dev);
400
401	if (net->get_stats)
402	sysfs_remove_group(&class_dev->kobj, &netstat_group);
403
404	#ifdef WIRELESS_EXT
405	if (net->get_wireless_stats)
406	sysfs_remove_group(&class_dev->kobj, &wireless_group);
407	#endif
408	class_device_del(class_dev);
409
410	}
411
412	/* Create sysfs entries for network device. */
413	int netdev_register_sysfs(struct net_device *net)
414	{
415	struct class_device *class_dev = &(net->class_dev);
416	int i;
417	struct class_device_attribute *attr;
418	int ret;
419
420	class_dev->class = &net_class;
421	class_dev->class_data = net;
422
423	strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
424	if ((ret = class_device_register(class_dev)))
425	goto out;
426
427	for (i = 0; (attr = net_class_attributes[i]) != NULL; i++) {
428	if ((ret = class_device_create_file(class_dev, attr)))
429	goto out_unreg;
430	}
431
432
433	if (net->get_stats &&
434	(ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
435	goto out_unreg;
436
437	#ifdef WIRELESS_EXT
438	if (net->get_wireless_stats &&
439	(ret = sysfs_create_group(&class_dev->kobj, &wireless_group)))
440	goto out_cleanup;
441
442	return 0;
443	out_cleanup:
444	if (net->get_stats)
445	sysfs_remove_group(&class_dev->kobj, &netstat_group);
446	#else
447	return 0;
448	#endif
449
450	out_unreg:
451	printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n",
452	net->name, ret);
453	class_device_unregister(class_dev);
454	out:
455	return ret;
456	}
457
458	int netdev_sysfs_init(void)
459	{
460	return class_register(&net_class);
461	}