[openib-general] [RFC] Support for Additional Scopes for IPoIB MC Groups

[Roland Dreier]

 > In preparation for IB routers, other scopes should be supported.
 > 
 > Is an acceptable approach to supporting additional scopes to add a
 > module parameter for this ?

I don't think that's a good solution, since it forces every IPoIB
interface to use the same scope.  I think there should be some
per-interface way to set the scope, either via sysfs or an ethtool interface.