[dpdk-dev] [RFC v2 2/2] vhost: support requests only handled by external backend

[Stojaczyk, Dariusz]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Maxime Coquelin
> Sent: Thursday, February 28, 2019 4:32 PM
> To: dev at dpdk.org; Liu, Changpeng <changpeng.liu at intel.com>; Bie, Tiwei
> <tiwei.bie at intel.com>; i.maximets at samsung.com
> Cc: Maxime Coquelin <maxime.coquelin at redhat.com>
> Subject: [dpdk-dev] [RFC v2 2/2] vhost: support requests only handled by
> external backend
> 
> External backends may have specific requests to handle, and so
> we don't want the vhost-user lib to handle these requests as
> errors.
> 
> This patch also changes the experimental API by introducing
> RTE_VHOST_MSG_RESULT_NOT_HANDLED so that vhost-user lib
> can report an error if a message is handled neither by
> the vhost-user library nor by the external backend.
> 
> The logic changes a bit so that if the callback returns
> with ERR, OK or REPLY, it is considered the message
> is handled by the external backend so it won't be
> handled by the vhost-user library.
> It is still possible for an external backend to listen
> to requests that have to be handled by the vhost-user
> library like SET_MEM_TABLE, but the callback have to
> return NOT_HANDLED in that case.
> 
> Suggested-by: Ilya Maximets <i.maximets at samsung.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
> ---

Besides the fall-through compilation issue,

Tested-by: Darek Stojaczyk <dariusz.stojaczyk at intel.com>

Thanks!