dummynet: bandwidth is limited to 2 Gbit/s ?

[Rodney W. Grimes]

> On 24.09.2019 12:42, Andriy Gapon wrote:
> 
> > It seems that the userland component of ipfw/dummynet uses int for the bandwidth
> > represented in bit/s.  Also, int is used for passing that value from the
> > userland to the kernel.
> > 
> > What would be the best way to extend this?
> > Just use a larger type?
> > Or maybe add another field to try to preserve KBI backward compatibility?
> > 
> > Thank you.
> 
> AFAIK, we never had any public ABI or stable KBI interface announced to userland or in-kernel consumers
> and had no consumers of dummynet other than ipfw(8) binary. Just increase type.

Any attempt to mfc this would break KABI/userland and that is never
a good thing to do.  It may not be a public ABI, but it is an ABI,
and stability of that and backwards compatibility are always a good
thing to strive for.

-- 
Rod Grimes                                                 rgrimes at freebsd.org