netdev - Re: [PATCH 2/3] vhost/vsock: support for SOCK

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Date:   Sat, 2 Jan 2021 13:12:13 +0300
From:   Arseny Krasnov <arseny.krasnov@...persky.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
CC:     Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] vhost/vsock: support for SOCK_SEQPACKET socket.

> oh this was not threaded correctly so I did not see rest of
> patches. ignore this pls will respond there.

Sorry, i'll resend whole patchset ASAP in one thread.

On 30.12.2020 23:58, Michael S. Tsirkin wrote:
> On Wed, Dec 30, 2020 at 03:56:03PM -0500, Michael S. Tsirkin wrote:
>> On Tue, Dec 29, 2020 at 02:06:33PM +0300, Arseny Krasnov wrote:
>>> 	This patch simply adds transport ops and removes
>>> ignore of non-stream type of packets.
>>>
>>> Signed-off-by: Arseny Krasnov <arseny.krasnov@...persky.com>
>> How is this supposed to work? virtio vsock at the moment
>> has byte level end to end credit accounting at the
>> protocol level. I suspect some protocol changes involving
>> more than this tweak would
>> be needed to properly support anything that isn't a stream.
>
> oh this was not threaded correctly so I did not see rest of
> patches. ignore this pls will respond there.
>
>>> ---
>>>  drivers/vhost/vsock.c | 6 ++++--
>>>  1 file changed, 4 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
>>> index a483cec31d5c..4a36ef1c52d0 100644
>>> --- a/drivers/vhost/vsock.c
>>> +++ b/drivers/vhost/vsock.c
>>> @@ -346,8 +346,7 @@ vhost_vsock_alloc_pkt(struct vhost_virtqueue *vq,
>>>  		return NULL;
>>>  	}
>>>  
>>> -	if (le16_to_cpu(pkt->hdr.type) == VIRTIO_VSOCK_TYPE_STREAM)
>>> -		pkt->len = le32_to_cpu(pkt->hdr.len);
>>> +	pkt->len = le32_to_cpu(pkt->hdr.len);
>>>  
>>>  	/* No payload */
>>>  	if (!pkt->len)
>>> @@ -416,6 +415,9 @@ static struct virtio_transport vhost_transport = {
>>>  		.stream_is_active         = virtio_transport_stream_is_active,
>>>  		.stream_allow             = virtio_transport_stream_allow,
>>>  
>>> +		.seqpacket_seq_send_len	  = virtio_transport_seqpacket_seq_send_len,
>>> +		.seqpacket_seq_get_len	  = virtio_transport_seqpacket_seq_get_len,
>>> +
>>>  		.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
>