[dpdk-stable] [PATCH v3] vhost: add header check in dequeue offload

[Maxime Coquelin]

On 4/12/21 11:33 AM, David Marchand wrote:
> On Mon, Apr 12, 2021 at 11:09 AM Wang, Xiao W <xiao.w.wang at intel.com> wrote:
>> Considering the major consumer of vhost API is virtual switch/router, I tend to keep the current implementation and apply this fix patch.
>> Any comments?
> 
> This is just a hack that bypasses the vswitch control.
> 
> It happens to work when the vswitch does nothing.
> If anything is done, like popping a vlan header, the vswitch needs to
> update l3 offset.
> 
> 

I agree with David, current behavior is wrong.

Furthermore, when the lib is used via the Vhost PMD, the application
should not have to handle it differently on whether it is Vhost PMD or
any physical NIC PMD.