netdev - Re: [PATCH net-next 00/14] net: provide common RSS key infrastructure

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Message-Id: <20141116.160339.237379782878143946.davem@davemloft.net>
Date:	Sun, 16 Nov 2014 16:03:39 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	edumazet@...gle.com
Cc:	netdev@...r.kernel.org, Thomas.Lendacky@....com,
	ariel.elior@...gic.com, mchan@...adcom.com, prashant@...adcom.com,
	rasesh.mody@...gic.com, sathya.perla@...lex.com,
	subbu.seetharaman@...lex.com, ajit.khaparde@...lex.com,
	jesse.brandeburg@...el.com, jeffrey.t.kirsher@...el.com,
	amirv@...lanox.com, sshah@...arflare.com, sbhatewara@...are.com
Subject: Re: [PATCH net-next 00/14] net: provide common RSS key
 infrastructure

From: Eric Dumazet <edumazet@...gle.com>
Date: Sun, 16 Nov 2014 06:23:04 -0800

> RSS (Receive Side Scaling) uses a 40 bytes key to provide hash for incoming
> packets to select appropriate incoming queue on NIC.
> 
> Hash algo (Toeplitz) is also well known and documented by Microsoft
> (search for "Verifying the RSS Hash Calculation")
> 
> Problem is that some drivers use a well known key.
> It makes very easy for attackers to target one particular RX queue,
> knowing that number of RX queues is a power of two, or at least some
> small number.
> 
> Other drivers use a random value per port, making difficult
> tuning on bonding setups.
> 
> Lets add a common infrastructure, so that host gets an unique
> RSS key, and drivers do not have to worry about this.

Looks good, series applied, thanks Eric.
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