iproute2: Add netlink attribute to filter dump requests

Add a new netlink attribute type to the dump request to allow
filtering of the information returned for the respective matching
interfaces.  At this time the only filter defined is to request
virtual function (VF) device info for interfaces that attached VFs.

It will also be possible to extend the request with other yet to be
defined netlink attributes in the future.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
1 file changed