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[NET]: Expose netdevice dev_id through sysfs 

Expose dev_id to userspace, because it helps to disambiguate between
interfaces where the MAC address is unique.

This should allow us to simplify the handling of persistent naming for
S390 network devices in udev -- because it can depend on a simple
attribute of the device like the other match criteria, rather than
having a special case for SUBSYSTEMS=="ccwgroup".

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Woodhouse 2008-04-20 16:07:43 -07:00 committed by David S. Miller
parent f7d0e5a506
commit 9d29672c64
1 changed files with 2 additions and 0 deletions
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2
net/core/net-sysfs.c
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@ -87,6 +87,7 @@ static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
return ret;
}
NETDEVICE_SHOW(dev_id, fmt_hex);
NETDEVICE_SHOW(addr_len, fmt_dec);
NETDEVICE_SHOW(iflink, fmt_dec);
NETDEVICE_SHOW(ifindex, fmt_dec);
@ -210,6 +211,7 @@ static ssize_t store_tx_queue_len(struct device *dev,
static struct device_attribute net_class_attributes[] = {
__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
__ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
__ATTR(iflink, S_IRUGO, show_iflink, NULL),
__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
__ATTR(features, S_IRUGO, show_features, NULL),