netdev - Re: [PATCH 5/5] ipv4: Add FIB nexthop exceptions.

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Date:	Tue, 17 Jul 2012 16:00:05 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 5/5] ipv4: Add FIB nexthop exceptions.

On Tue, 2012-07-17 at 06:14 -0700, David Miller wrote:
> In a regime where we have subnetted route entries, we need a way to
> store persistent storage about destination specific learned values
> such as redirects and PMTU values.
> 
> This is implemented here via nexthop exceptions.
> 
> The initial implementation is a simple linked list, and can be
> expanded to a hash table when it is shown to be justified.

Say a typical host uses a single default route, I am trying to convince
myself it can really use a simple linked list ?

Arent PMTU entries added by messages coming from untrusted sources ?

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