Re: [RFC PATCH v4 10/17] vhost/vsock: support MSG_ZEROCOPY for transport

[Stefano Garzarella]

On Sat, Jun 03, 2023 at 11:49:32PM +0300, Arseniy Krasnov wrote:
> Add 'msgzerocopy_allow()' callback for vhost transport.
>
> Signed-off-by: Arseniy Krasnov <AVKrasnov@xxxxxxxxxxxxxx>
> ---
> drivers/vhost/vsock.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
> index b254aa4b756a..318866713ef7 100644
> --- a/drivers/vhost/vsock.c
> +++ b/drivers/vhost/vsock.c
> @@ -396,6 +396,11 @@ 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 = {
> @@ -442,6 +447,7 @@ static struct virtio_transport vhost_transport = {
> 		.notify_buffer_size       = virtio_transport_notify_buffer_size,
>
> 		.read_skb = virtio_transport_read_skb,
> +		.msgzerocopy_allow        = vhost_transport_msgzerocopy_allow,

Can we move this after .seqpacket section?

> 	},
>
> 	.send_pkt = vhost_transport_send_pkt,
> --
> 2.25.1