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Date:   Mon, 26 Jun 2023 18:10:56 +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 v4 10/17] vhost/vsock: support MSG_ZEROCOPY for
 transport
Message-ID: <cqlp2jr7laleku3reiqf64swlieso6rvi47u5cnlu24kfn3fnm@3x45ihmjox77>
References: <20230603204939.1598818-1-AVKrasnov@sberdevices.ru>
 <20230603204939.1598818-11-AVKrasnov@sberdevices.ru>
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In-Reply-To: <20230603204939.1598818-11-AVKrasnov@sberdevices.ru>
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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@sberdevices.ru>
>---
> 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
>