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Date:   Thu, 6 Jul 2023 18:56:01 +0200
From:   Stefano Garzarella <sgarzare@redhat.com>
To:     Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Cc:     Stefan Hajnoczi <stefanha@redhat.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        "Michael S. Tsirkin" <mst@redhat.com>,
        Jason Wang <jasowang@redhat.com>,
        Bobby Eshleman <bobby.eshleman@bytedance.com>,
        kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel@sberdevices.ru, oxffffaa@gmail.com
Subject: Re: [RFC PATCH v5 12/17] vsock/loopback: support MSG_ZEROCOPY for
 transport
Message-ID: <p2ctmue6xm6v7px7uir2rtav6lvgenakmh45t2hd5qvdxvbeyq@cqmlufisosgx>
References: <20230701063947.3422088-1-AVKrasnov@sberdevices.ru>
 <20230701063947.3422088-13-AVKrasnov@sberdevices.ru>
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In-Reply-To: <20230701063947.3422088-13-AVKrasnov@sberdevices.ru>
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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@sberdevices.ru>
>---
> 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@redhat.com>

>
>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
>