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Commit 9d29672c authored by David Woodhouse's avatar David Woodhouse Committed by David S. Miller
Browse files

[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: default avatarDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f7d0e5a5

net/core/net-sysfs.c

+2 −0
Original line number Diff line number Diff line
@@ -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),