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net: add sysfs entry for device group
The group of a network device can be queried or changed from userspace using sysfs. For example, considering sysfs mounted in /sys, one can change the group that interface lo belongs to: echo 1 > /sys/class/net/lo/group Signed-off-by: Vlad Dogaru <ddvlad@rosedu.org> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 15 additions and 0 deletions
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@ -295,6 +295,20 @@ static ssize_t show_ifalias(struct device *dev,
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return ret;
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return ret;
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}
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}
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NETDEVICE_SHOW(group, fmt_dec);
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static int change_group(struct net_device *net, unsigned long new_group)
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{
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dev_set_group(net, (int) new_group);
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return 0;
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}
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static ssize_t store_group(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return netdev_store(dev, attr, buf, len, change_group);
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}
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static struct device_attribute net_class_attributes[] = {
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static struct device_attribute net_class_attributes[] = {
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__ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
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__ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
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__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
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__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
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@ -316,6 +330,7 @@ static struct device_attribute net_class_attributes[] = {
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__ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
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__ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
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__ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
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__ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
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store_tx_queue_len),
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store_tx_queue_len),
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__ATTR(group, S_IRUGO | S_IWUSR, show_group, store_group),
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{}
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{}
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};
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};
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