netdev - Re: [RFC PATCH net-next 2/4] switchdev: add fwd

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Message-ID: <557EEC8E.9070206@cumulusnetworks.com>
Date:	Mon, 15 Jun 2015 08:17:34 -0700
From:	roopa <roopa@...ulusnetworks.com>
To:	sfeldma@...il.com
CC:	netdev@...r.kernel.org, jiri@...nulli.us,
	simon.horman@...ronome.com, ronen.arad@...el.com,
	john.r.fastabend@...el.com, andrew@...n.ch, f.fainelli@...il.com,
	linux@...ck-us.net, davidch@...adcom.com,
	stephen@...workplumber.org
Subject: Re: [RFC PATCH net-next 2/4] switchdev: add fwd_mark generator helper

On 6/13/15, 11:04 AM, sfeldma@...il.com wrote:
> From: Scott Feldman <sfeldma@...il.com>
>
> skb->fwd_mark and dev->fwd_mark are 32-bit and should be unique for device
> and maybe even unique for a sub-set of ports within device, so add
> switchdev helper function to generate unique marks based on driver-supplied
> key.  Typically, the driver would use device switch ID for key, and maybe
> additional fields in key for grouped ports such as bridge ifindex.  The key
> can be of arbitrary length.
>
> The generator uses a global hash table to store fwd_marks hashed by key.
>
> Signed-off-by: Scott Feldman <sfeldma@...il.com>
Acked-by: Roopa Prabhu <roopa@...ulusnetworks.com>
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