On Fri, 14 Feb 2014 18:59:37 -0800 "Luis R. Rodriguez" <mcgrof@xxxxxxxxxxxxxxxx> wrote: > From: "Luis R. Rodriguez" <mcgrof@xxxxxxxx> > > It doesn't make sense for some interfaces to become a root bridge > at any point in time. One example is virtual backend interfaces > which rely on other entities on the bridge for actual physical > connectivity. They only provide virtual access. > > Device drivers that know they should never become part of the > root bridge have been using a trick of setting their MAC address > to a high broadcast MAC address such as FE:FF:FF:FF:FF:FF. Instead > of using these hacks lets the interfaces annotate its intent and > generalizes a solution for multiple drivers, while letting the > drivers use a random MAC address or one prefixed with a proper OUI. > This sort of hack is used by both qemu and xen for their backend > interfaces. > > Cc: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx> > Cc: bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx > Cc: netdev@xxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx > Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxx> This is already supported in a more standard way via the root block flag. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
