[NET]: Expose netdevice dev_id through sysfs (9d29672c) · Commits · 戴 / test

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>

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),

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