Re: [Xen-devel] [PATCH RFC 1/8] public/io/blkif: add directory for backend parameters

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Thu, Nov 02, 2017 at 06:06:09PM +0000, Joao Martins wrote:
> The proposed directory provides a mechanism for tools to control the
> maximum feature set of the device being provisioned by backends.
> Examples include max ring page order, persistent grants, number of
> queues etc.
> 
> Signed-off-by: Joao Martins <joao.m.martins@xxxxxxxxxx>
> ---
>  xen/include/public/io/blkif.h | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/xen/include/public/io/blkif.h b/xen/include/public/io/blkif.h
> index 15a71e3fea..4c0a93a2bf 100644
> --- a/xen/include/public/io/blkif.h
> +++ b/xen/include/public/io/blkif.h
> @@ -133,6 +133,20 @@
>   *      This option doesn't require a backend to use O_DIRECT, so it
>   *      should not be used to try to control the caching behaviour.
>   *
> + * require

I would maybe name this 'config'.

> + *
> + *      The directory "require" maybe be created by tools domain to
> + *      override the maximum feature set that backend provides to the
> + *      frontend. The children entries within this directory are
> + *      features names and its correspondent value e.g.:
                                  ^ corresponding

Thanks, Roger.

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