linux-kernel - RE: [PATCH] vsock: only load vmci transport on VMware hypervisor by default

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Message-ID: <KL1P15301MB0008087A3EF0A8D037CC4D52BF9F0@KL1P15301MB0008.APCP153.PROD.OUTLOOK.COM>
Date:   Tue, 29 Aug 2017 02:36:25 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     "'Jorgen S. Hansen'" <jhansen@...are.com>,
        'Stefan Hajnoczi' <stefanha@...hat.com>
CC:     "'davem@...emloft.net'" <davem@...emloft.net>,
        "'netdev@...r.kernel.org'" <netdev@...r.kernel.org>,
        "'gregkh@...uxfoundation.org'" <gregkh@...uxfoundation.org>,
        "'devel@...uxdriverproject.org'" <devel@...uxdriverproject.org>,
        KY Srinivasan <kys@...rosoft.com>,
        "Haiyang Zhang" <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        'George Zhang' <georgezhang@...are.com>,
        'Michal Kubecek' <mkubecek@...e.cz>,
        'Asias He' <asias@...hat.com>,
        'Vitaly Kuznetsov' <vkuznets@...hat.com>,
        'Cathy Avery' <cavery@...hat.com>,
        "'jasowang@...hat.com'" <jasowang@...hat.com>,
        'Rolf Neugebauer' <rolf.neugebauer@...ker.com>,
        "'Dave Scott'" <dave.scott@...ker.com>,
        'Marcelo Cerri' <marcelo.cerri@...onical.com>,
        "'apw@...onical.com'" <apw@...onical.com>,
        "'olaf@...fle.de'" <olaf@...fle.de>,
        "'joe@...ches.com'" <joe@...ches.com>,
        "'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
        "'Dan Carpenter'" <dan.carpenter@...cle.com>
Subject: RE: [PATCH] vsock: only load vmci transport on VMware hypervisor by
 default

> From: Dexuan Cui
> Sent: Tuesday, August 22, 2017 21:21
> > ...
> > ...
> > The only problem here would be the potential for a guest and a host app
> to
> > have a conflict wrt port numbers, even though they would be able to
> > operate fine, if restricted to their appropriate transport.
> >
> > Thanks,
> > Jorgen
> 
> Hi Jorgen, Stefan,
> Thank you for the detailed analysis!
> You have a much better understanding than me about the complex
> scenarios. Can you please work out a patch? :-)

Hi Jorgen, Stefan,
May I know your plan for this? 
 
> IMO Linux driver of Hyper-V sockets is the simplest case, as we only have
> the "to host" option (the host side driver of Hyper-V sockets runs on
> Windows kernel and I don't think the other hypervisors emulate
> the full Hyper-V VMBus 4.0, which is required to support Hyper-V sockets).
> 
> -- Dexuan

Thanks,
-- Dexuan