Re: [RFC PATCH v5 12/17] vsock/loopback: support MSG_ZEROCOPY for transport

[Stefano Garzarella]

On Sat, Jul 01, 2023 at 09:39:42AM +0300, Arseniy Krasnov wrote:
> Add 'msgzerocopy_allow()' callback for loopback transport.
>
> Signed-off-by: Arseniy Krasnov <AVKrasnov@xxxxxxxxxxxxxx>
> ---
> Changelog:
> v4 -> v5:
>  * Move 'msgzerocopy_allow' right after seqpacket callbacks.
>  * Don't use prototype for 'vsock_loopback_msgzerocopy_allow()'.
>
> net/vmw_vsock/vsock_loopback.c | 6 ++++++
> 1 file changed, 6 insertions(+)

Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>

> diff --git a/net/vmw_vsock/vsock_loopback.c b/net/vmw_vsock/vsock_loopback.c
> index 5c6360df1f31..048640167411 100644
> --- a/net/vmw_vsock/vsock_loopback.c
> +++ b/net/vmw_vsock/vsock_loopback.c
> @@ -47,6 +47,10 @@ static int vsock_loopback_cancel_pkt(struct vsock_sock *vsk)
> }
>
> static bool vsock_loopback_seqpacket_allow(u32 remote_cid);
> +static bool vsock_loopback_msgzerocopy_allow(void)
> +{
> +	return true;
> +}
>
> static struct virtio_transport loopback_transport = {
> 	.transport = {
> @@ -79,6 +83,8 @@ static struct virtio_transport loopback_transport = {
> 		.seqpacket_allow          = vsock_loopback_seqpacket_allow,
> 		.seqpacket_has_data       = virtio_transport_seqpacket_has_data,
>
> +		.msgzerocopy_allow        = vsock_loopback_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