Re: [PATCH] vlan: set sysfs device_type to 'vlan'

From: Ben Greear
Date: Tue Oct 23 2012 - 19:03:28 EST

On 10/23/2012 03:52 PM, Ben Hutchings wrote:
On Tue, 2012-10-23 at 09:14 -0700, Ben Greear wrote:
On 10/22/2012 11:36 PM, David Miller wrote:
From: Doug Goldstein <cardoe@xxxxxxxxxx>
Date: Mon, 22 Oct 2012 00:53:57 -0500

Sets the sysfs device_type to 'vlan' for udev. This makes it easier for
applications that query network information via udev to identify vlans
instead of using strrchr().

Signed-off-by: Doug Goldstein <cardoe@xxxxxxxxxx>

You're extremely misguided. This change, in fact, makes it ten times
harder for such applications to query such devices.

If the application doesn't care, it can use the old way (which at least
for me, involves string-comparing the driver name ethtool returns, which
sucks at best).

The 'old way' that has only worked since Linux 2.6.29 (3.5 years)?

The 'right way' seems to be to query for VLAN information through
netlink. But that has only worked since Linux 2.6.23 (5 years ago).
The real 'old way' is to use SIOCGIFVLAN. :-/

Oh, I have the SIOCGIFVLAN fallback in place too.

But none of this is easy from a shell script, where reading a sysfs
file is quite easy.


Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at