netdev - Re: [PATCH] net/openvswitch: Remove the skb encapsulation mark after decapsulation

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Date:	Wed, 22 Jan 2014 10:02:54 -0800
From:	Jesse Gross <jesse@...ira.com>
To:	Or Gerlitz <or.gerlitz@...il.com>
Cc:	Or Gerlitz <ogerlitz@...lanox.com>,
	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Joseph Gasparakis <joseph.gasparakis@...el.com>,
	Pravin B Shelar <pshelar@...ira.com>
Subject: Re: [PATCH] net/openvswitch: Remove the skb encapsulation mark after decapsulation

On Wed, Jan 22, 2014 at 9:23 AM, Or Gerlitz <or.gerlitz@...il.com> wrote:
> On Wed, Jan 22, 2014 at 7:02 PM, Jesse Gross <jesse@...ira.com> wrote:
>> On Wed, Jan 22, 2014 at 7:15 AM, Or Gerlitz <ogerlitz@...lanox.com> wrote:
>>> We must unset the skb encapsulation mark before injecting the
>>> decapsulated packet into ovs for the rest of its journey.
>>>
>>> This follows the practice set by 0afb166 "vxlan: Add capability of Rx
>>> checksum offload for inner packet" and the overall idea behind the
>>> skb encapsulation field.
>>>
>>> Cc: Joseph Gasparakis <joseph.gasparakis@...el.com>
>>> Cc: Pravin B Shelar <pshelar@...ira.com>
>>> Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
>>
>> This should be in the common decapsulation code. It doesn't make sense
>> to do this here when we set the layer pointers, encap bit, etc. in
>> common code on transmit.
>
> well that's a bit problematic, since the code in the vxlan driver vxlan_rcv()
> which has the potential to be common refers to vxlan->dev-> which is
> irrelevant for ovs, thoughts?

Well, as I said before, I don't really see the value in the
NETIF_F_RXCSUM flag on a VXLAN device but in any case you could break
that if statement in half and move the part that doesn't refer to
vxlan->dev into common code.
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