From: Vlad Dogaru Date: Mon, 24 Jan 2011 03:37:29 +0000 (+0000) Subject: net: add sysfs entry for device group X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a512b92b3af4b03fc6834617a042dc85fbd4e34e;p=linux-beck.git 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 Acked-by: Stephen Hemminger Signed-off-by: David S. Miller --- diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 81367ccf3306..2e4a393dfc3b 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -295,6 +295,20 @@ static ssize_t show_ifalias(struct device *dev, 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), @@ -316,6 +330,7 @@ static struct device_attribute net_class_attributes[] = { __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(group, S_IRUGO | S_IWUSR, show_group, store_group), {} };