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net: allow to change carrier via sysfs 

Make carrier writable

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Jiri Pirko 2012-12-27 23:49:38 +00:00 committed by David S. Miller
parent 4bf84c35c6
commit fdae0fde53
1 changed files with 14 additions and 1 deletions
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15
net/core/net-sysfs.c
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@ -126,6 +126,19 @@ static ssize_t show_broadcast(struct device *dev,
return -EINVAL;
}
static int change_carrier(struct net_device *net, unsigned long new_carrier)
{
if (!netif_running(net))
return -EINVAL;
return dev_change_carrier(net, (bool) new_carrier);
}
static ssize_t store_carrier(struct device *dev, struct device_attribute *attr,
const char *buf, size_t len)
{
return netdev_store(dev, attr, buf, len, change_carrier);
}
static ssize_t show_carrier(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -331,7 +344,7 @@ static struct device_attribute net_class_attributes[] = {
__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(carrier, S_IRUGO | S_IWUSR, show_carrier, store_carrier),
__ATTR(speed, S_IRUGO, show_speed, NULL),
__ATTR(duplex, S_IRUGO, show_duplex, NULL),
__ATTR(dormant, S_IRUGO, show_dormant, NULL),