netdev - Re: [PATCH v1 0/2] bpf: add longest prefix match map

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Date:   Fri, 30 Dec 2016 15:25:36 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     daniel@...que.org
Cc:     ast@...com, dh.herrmann@...il.com, daniel@...earbox.net,
        netdev@...r.kernel.org
Subject: Re: [PATCH v1 0/2] bpf: add longest prefix match map

From: Daniel Mack <daniel@...que.org>
Date: Thu, 29 Dec 2016 18:28:53 +0100

> This patch set adds a longest prefix match algorithm that can be used
> to match IP addresses to a stored set of ranges. It is exposed as a
> bpf map type.
>    
> Internally, data is stored in an unbalanced tree of nodes that has a
> maximum height of n, where n is the prefixlen the trie was created
> with.
>  
> Not that this has nothing to do with fib or fib6 and is in no way meant
> to replace or share code with it. It's rather a much simpler
> implementation that is specifically written with bpf maps in mind.
>  
> Patch 1/2 adds the implementation, and 2/2 an extensive test suite.
>  
> Feedback is much appreciated.

I'll give Alexei and Daniel time to provide feedback on this series.