netdev - More complex PBR rules

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Date:   Sun, 7 Jul 2019 00:06:58 +0100
From:   "Markus Moeller" <huaraz@...ller.plus.com>
To:     <netdev@...r.kernel.org>
Subject: More complex PBR rules

Hi Network developers

I am new to this group and wonder if you can advise how I could implement 
more complex PBR rules to achieve for example load balancing. The 
requirement I have is to route based on e.g. a hash like:

  hash(src-ip+dst-ip) mod N  routes via  gwX    0<X<=N   ( load balance over 
N gateways )

  This would help in situations where I can not use a MAC for identifying a 
gateway  ( e.g. in cloud environments) .

   Could someone point me to the kernel source code where PBR is performed ?

Thank you
Markus