From: David S. Miller <davem@davemloft.net>
Date: Tue, 17 Jul 2012 11:19:00 +0000 (-0700)
Subject: ipv4: Add FIB nexthop exceptions.
X-Git-Tag: v3.6-rc1~125^2~124^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4895c771c7f006b4b90f9d6b1d2210939ba57b38;p=pandora-kernel.git

ipv4: Add FIB nexthop exceptions.

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 2048 entry hash table with relaiming
starting at chain length 5.  A more sophisticated scheme can be
devised if that proves necessary.

Signed-off-by: David S. Miller <davem@davemloft.net>
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