netdev - Re: [PATCH 1/2] bonding: Doesn't support IPv6

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Date:	Sat, 29 Oct 2011 09:55:29 +0200
From:	Michał Mirosław <mirqus@...il.com>
To:	John <linux@...2.net>
Cc:	netdev@...r.kernel.org, andy@...yhouse.net
Subject: Re: [PATCH 1/2] bonding: Doesn't support IPv6

2011/10/29 John <linux@...2.net>:
> --- a/drivers/net/bonding/bond_main.c   2011-04-19 11:18:48.000000000 -0700
> +++ b/drivers/net/bonding/bond_main.c   2011-10-27 11:26:20.000000000 -0700
[...]
> +               v6hash = (v6hash >> 16) ^ (v6hash >> 8) ^ v6hash;

This XORs in only 3 of 4 bytes, and assuming count > 256 (its unlikely
you have more than 256 slaves in bond) the most significant byte is
wasted. It should be:

v6hash ^= v6hash >> 16;
v6hash ^= v6hash >> 8;

Same for IPv4 part.

OTOH, if that was your intention, then the description in your mail was wrong.

Best Regards,
Michał Mirosław
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