Re: [RFC PATCH v5 10/17] vhost/vsock: support MSG_ZEROCOPY for transport

[Stefano Garzarella]

On Sat, Jul 01, 2023 at 09:39:40AM +0300, Arseniy Krasnov wrote:
> Add 'msgzerocopy_allow()' callback for vhost transport.
>
> Signed-off-by: Arseniy Krasnov <AVKrasnov@xxxxxxxxxxxxxx>
> ---
> Changelog:
> v4 -> v5:
>  * Move 'msgzerocopy_allow' right after seqpacket callbacks.
>
> drivers/vhost/vsock.c | 7 +++++++
> 1 file changed, 7 insertions(+)

Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>

> diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
> index cb00e0e059e4..3fd0ab0c0edc 100644
> --- a/drivers/vhost/vsock.c
> +++ b/drivers/vhost/vsock.c
> @@ -398,6 +398,11 @@ static bool vhost_vsock_more_replies(struct vhost_vsock *vsock)
> 	return val < vq->num;
> }
>
> +static bool vhost_transport_msgzerocopy_allow(void)
> +{
> +	return true;
> +}
> +
> static bool vhost_transport_seqpacket_allow(u32 remote_cid);
>
> static struct virtio_transport vhost_transport = {
> @@ -431,6 +436,8 @@ static struct virtio_transport vhost_transport = {
> 		.seqpacket_allow          = vhost_transport_seqpacket_allow,
> 		.seqpacket_has_data       = virtio_transport_seqpacket_has_data,
>
> +		.msgzerocopy_allow        = vhost_transport_msgzerocopy_allow,
> +
> 		.notify_poll_in           = virtio_transport_notify_poll_in,
> 		.notify_poll_out          = virtio_transport_notify_poll_out,
> 		.notify_recv_init         = virtio_transport_notify_recv_init,
> --
> 2.25.1