Re: new ABI

[Massimiliano Hofer <max@nucleus.it>]

On Thursday 24 August 2006 10:50 am, Jozsef Kadlecsik wrote:

> + Match/target versioning support, i.e. be able to specify
>   version-dependent features. That might require OR operation
>   support at some level in one rule:
>
> # Handle two versions of the same module:
> -m foo --foo-version 2 <flags 2> --OR --foo-version 1 <flags 1>
> # Handle new or possibly missing module
> -m bar --bar-version 1 <flags 1> --OR --false|true|fatal-error|ignore-rule
>
> Interesting question is how to handle such rules in the kernel, taking
> into account that we want the 'SAVE' operation to work correctly.

This could be a userspace problem. The kernel could disclose what matches are 
registered (given that the corresponding module is loaded) and what versions 
are supported.
Choosing different paths based on some fixed parameter like the current 
version isn't something we should do for every packet in transit.

-- 
Saluti,
   Massimiliano Hofer
        Nucleus