netdev - Re: [PATCH 0/6] virtio/vsock: introduce dgrams, sk

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Message-ID: <20220817135311-mutt-send-email-mst@kernel.org>
Date:   Wed, 17 Aug 2022 13:53:32 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Bobby Eshleman <bobbyeshleman@...il.com>
Cc:     Bobby Eshleman <bobby.eshleman@...il.com>,
        Bobby Eshleman <bobby.eshleman@...edance.com>,
        Cong Wang <cong.wang@...edance.com>,
        Jiang Wang <jiang.wang@...edance.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org
Subject: Re: [PATCH 0/6] virtio/vsock: introduce dgrams, sk_buff, and qdisc

On Tue, Aug 16, 2022 at 11:08:26AM +0000, Bobby Eshleman wrote:
> On Wed, Aug 17, 2022 at 01:02:52PM -0400, Michael S. Tsirkin wrote:
> > On Tue, Aug 16, 2022 at 09:42:51AM +0000, Bobby Eshleman wrote:
> > > > The basic question to answer then is this: with a net device qdisc
> > > > etc in the picture, how is this different from virtio net then?
> > > > Why do you still want to use vsock?
> > > > 
> > > 
> > > When using virtio-net, users looking for inter-VM communication are
> > > required to setup bridges, TAPs, allocate IP addresses or setup DNS,
> > > etc... and then finally when you have a network, you can open a socket
> > > on an IP address and port. This is the configuration that vsock avoids.
> > > For vsock, we just need a CID and a port, but no network configuration.
> > 
> > Surely when you mention DNS you are going overboard? vsock doesn't
> > remove the need for DNS as much as it does not support it.
> > 
> 
> Oops, s/DNS/dhcp.

That too.

-- 
MST