/* * 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 <linux/slab.h>#include <linux/nsproxy.h>#include <net/sock.h>#include <net/net_namespace.h>#include <linux/rtnetlink.h>#include <linux/wireless.h>#include <linux/vmalloc.h>#include <linux/export.h>#include <linux/jiffies.h>#include <net/wext.h> #include "net-sysfs.h" #ifdef CONFIG_SYSFSstatic 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_udec[] = "%u\n";static const char fmt_ulong[] = "%lu\n";static const char fmt_u64[] = "%llu\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);	unsigned long new;	int ret = -EINVAL; 	if (!capable(CAP_NET_ADMIN))		return -EPERM; 	ret = kstrtoul(buf, 0, &new);	if (ret)		goto err; 	if (!rtnl_trylock())		return restart_syscall(); 	if (dev_isalive(net)) {		if ((ret = (*set)(net, new)) == 0)			ret = len;	}	rtnl_unlock(); err:	return ret;} NETDEVICE_SHOW(dev_id, fmt_hex);NETDEVICE_SHOW(addr_assign_type, fmt_dec);NETDEVICE_SHOW(addr_len, fmt_dec);NETDEVICE_SHOW(iflink, fmt_dec);NETDEVICE_SHOW(ifindex, fmt_dec);NETDEVICE_SHOW(type, fmt_dec);NETDEVICE_SHOW(link_mode, fmt_dec); /* use same locking rules as GIFHWADDR ioctl's */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 = sysfs_format_mac(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 sysfs_format_mac(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_speed(struct device *dev,			  struct device_attribute *attr, char *buf){	struct net_device *netdev = to_net_dev(dev);	int ret = -EINVAL; 	if (!rtnl_trylock())		return restart_syscall(); 	if (netif_running(netdev)) {		struct ethtool_cmd cmd;		if (!__ethtool_get_settings(netdev, &cmd))			ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd));	}	rtnl_unlock();	return ret;} static ssize_t show_duplex(struct device *dev,			   struct device_attribute *attr, char *buf){	struct net_device *netdev = to_net_dev(dev);	int ret = -EINVAL; 	if (!rtnl_trylock())		return restart_syscall(); 	if (netif_running(netdev)) {		struct ethtool_cmd cmd;		if (!__ethtool_get_settings(netdev, &cmd))			ret = sprintf(buf, "%s\n",				      cmd.duplex ? "full" : "half");	}	rtnl_unlock();	return ret;} 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 *const 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 int) 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 ssize_t store_ifalias(struct device *dev, struct device_attribute *attr,			     const char *buf, size_t len){	struct net_device *netdev = to_net_dev(dev);	size_t count = len;	ssize_t ret; 	if (!capable(CAP_NET_ADMIN))		return -EPERM; 	/* ignore trailing newline */	if (len >  0 && buf[len - 1] == '\n')		--count; 	if (!rtnl_trylock())		return restart_syscall();	ret = dev_set_alias(netdev, buf, count);	rtnl_unlock(); 	return ret < 0 ? ret : len;} static ssize_t show_ifalias(struct device *dev,			    struct device_attribute *attr, char *buf){	const struct net_device *netdev = to_net_dev(dev);	ssize_t ret = 0; 	if (!rtnl_trylock())		return restart_syscall();	if (netdev->ifalias)		ret = sprintf(buf, "%s\n", netdev->ifalias);	rtnl_unlock();	return ret;} NETDEVICE_SHOW(group, fmt_dec); static int change_group(struct net_device *net, unsigned long new_group){	dev_set_group(net, (int) new_group);	return 0;} static ssize_t store_group(struct device *dev, struct device_attribute *attr,			 const char *buf, size_t len){	return netdev_store(dev, attr, buf, len, change_group);} static struct device_attribute net_class_attributes[] = {	__ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),	__ATTR(dev_id, S_IRUGO, show_dev_id, NULL),	__ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),	__ATTR(iflink, S_IRUGO, show_iflink, NULL),	__ATTR(ifindex, S_IRUGO, show_ifindex, 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(speed, S_IRUGO, show_speed, NULL),	__ATTR(duplex, S_IRUGO, show_duplex, NULL),	__ATTR(dormant, S_IRUGO, show_dormant, NULL),	__ATTR(operstate, S_IRUGO, show_operstate, NULL),	__ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),	__ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),	__ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,	       store_tx_queue_len),	__ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group),	{}}; /* 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);	ssize_t ret = -EINVAL; 	WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||			offset % sizeof(u64) != 0); 	read_lock(&dev_base_lock);	if (dev_isalive(dev)) {		struct rtnl_link_stats64 temp;		const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); 		ret = sprintf(buf, fmt_u64, *(u64 *)(((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 rtnl_link_stats64, 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_SYSFS/* 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;	ssize_t ret = -EINVAL; 	if (!rtnl_trylock())		return restart_syscall();	if (dev_isalive(dev)) {		iw = get_wireless_stats(dev);		if (iw)			ret = (*format)(iw, buf);	}	rtnl_unlock(); 	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_RPS/* * RX queue sysfs structures and functions. */struct rx_queue_attribute {	struct attribute attr;	ssize_t (*show)(struct netdev_rx_queue *queue,	    struct rx_queue_attribute *attr, char *buf);	ssize_t (*store)(struct netdev_rx_queue *queue,	    struct rx_queue_attribute *attr, const char *buf, size_t len);};#define to_rx_queue_attr(_attr) container_of(_attr,		\    struct rx_queue_attribute, attr)

Lines 1–500 of 1505. Load more