Re: Traffic shaping - class ID 16bit limit?

On Thu, 25 Aug 2011 19:06:58 +0200
Miroslav Kratochvil [off-list ref] wrote:

quoted

quoted

Technically the ClassID seems to be "hardcoded" as a 16bit value, but
after some source searching, I haven't found any good reason for it to
be 16-bit only.

Granted it was a poor choice in the initial design.
It is wired into the API and changing it would be quite painful.

I was feeling something like that would come.

If I get it correctly, the API change would consist of:

- some netlink protocol change
- slight modification of qdisc_class_hash
- modifications in all (four?) hierarchical schedulers
- tiny expansion of userspace tc utility

And all the magic compatiablity layers to make old code
work with new code.