On Wed, 25 Aug 2004 10:53:39 -0700
Stephen Hemminger [off-list ref] wrote:

Extend netem options to support new features.

This breaks all existing tc binaries.  We have to stop
doing this.

Yes, you can extend the structure, but when you do that you
have to teach functions like netem_change() how to cope
with the old structure layout.