linux-kernel - Re: [PATCHv3 net] openvswitch: Don't validate IPv6 label masks.

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Date:	Fri, 21 Nov 2014 14:47:10 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	joestringer@...ira.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	pshelar@...ira.com, dev@...nvswitch.org
Subject: Re: [PATCHv3 net] openvswitch: Don't validate IPv6 label masks.

From: Joe Stringer <joestringer@...ira.com>
Date: Wed, 19 Nov 2014 13:54:49 -0800

> When userspace doesn't provide a mask, OVS datapath generates a fully
> unwildcarded mask for the flow by copying the flow and setting all bits
> in all fields. For IPv6 label, this creates a mask that matches on the
> upper 12 bits, causing the following error:
> 
> openvswitch: netlink: Invalid IPv6 flow label value (value=ffffffff, max=fffff)
> 
> This patch ignores the label validation check for masks, avoiding this
> error.
> 
> Signed-off-by: Joe Stringer <joestringer@...ira.com>
> ---
> v3: Alternative approach.
>     Was "openvswitch: Fix mask generation for IPv6 labels."
> v2: OR lower 20 bits (upper 12 bits remain from earlier memdup)

Applied.
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