Il 2020-03-31 02:49, David Miller ha scritto:

From: Stefano Salsano <redacted>
Date: Tue, 31 Mar 2020 01:23:48 +0200

quoted

Of course a new application (e.g. iproute2, pyroute) using a new optional
parameter will not work on older kernels, but simply because the new parameter
is not supported. It will not work even without our proposed patch.

On the other hand, we think that the solution in the patch is more backward
compatible. Without the patch, if we define new attributes, old applications
(e.g. iproute2 scripts) will not work on newer kernels, while with the optional
attributes approach proposed in the patch they will work with no issues !

Translation: You want to add backwards compatibility problems because
otherwise you'll have to add backwards compatibility problems.

no this is not the correct translation :-) we do not want to add any 
backward compatility problem

we need to add a number of new parameters, if we keep the current 
approach these parameters will be mandatory and we will have backward 
compatibility problems: old applications will not work with new kernels

if we are allowed to add optional parameters, old applications and new 
applications will be able to work with old kernels and new kernels in 
any combination

Sorry, I'm still not convinced.

You must find another way to achieve your objective.

-- 
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Stefano Salsano
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Dipartimento Ingegneria Elettronica
Universita' di Roma Tor Vergata
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