netdev - [PATCH] Expose netdevice dev

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Message-Id: <1208690572.9212.433.camel@pmac.infradead.org>
Date:	Sun, 20 Apr 2008 12:22:52 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org
Subject: [PATCH] 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@...radead.org>

--- ./linux-2.6.24.ppc/net/core/net-sysfs.c~	2008-04-13 13:38:24.000000000 +0100
+++ ./linux-2.6.24.ppc/net/core/net-sysfs.c	2008-04-14 10:58:32.000000000 +0100
@@ -87,6 +87,7 @@ static ssize_t netdev_store(struct devic
 	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
 
 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),


-- 
dwmw2

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