[Rust-VMM] Crate for vhost-user device backend?

[Dr. David Alan Gilbert]

* Jiang Liu (liuj97 at gmail.com) wrote:
> 
> 
> > On Jan 17, 2019, at 11:00 PM, Liu, Jing2 <jing2.liu at linux.intel.com> wrote:
> > 
> > Hi Jiang,
> > 
> > On 1/17/2019 7:32 PM, Jiang Liu wrote:
> >>> On Jan 17, 2019, at 7:30 PM, Dr. David Alan Gilbert <dgilbert at redhat.com> wrote:
> >>> 
> >>> * Jiang Liu (liuj97 at gmail.com) wrote:
> >>>> 
> >>>> 
> >>>>> On Jan 17, 2019, at 6:58 PM, Marc-André Lureau <marcandre.lureau at gmail.com> wrote:
> >>>>> 
> >>>>> Hi
> >>>>> 
> >>>>> On Thu, Jan 17, 2019 at 2:56 PM Jiang Liu <liuj97 at gmail.com <mailto:liuj97 at gmail.com>> wrote:
> >>>>>> 
> >>>>>> We are working on a vhostuser-rs crate, and planned to posted it for RFC later.
> >>>>> 
> >>>>> Great news! Looking forward for it! Feel free to share WIP if you want help.
> >>>>> 
> >>>>>> 
> >>>>>>> On Jan 17, 2019, at 6:52 PM, Stefan Hajnoczi <stefanha at redhat.com> wrote:
> >>>>>>> 
> >>>>>>> Hi,
> >>>>>>> Has anyone implemented a vhost-user device backend in Rust?
> >>>>>>> 
> >>>>>>> QEMU's libvhost-user and DPDK's librte_vhost are C implementations that
> >>>>>>> provide a device backend API.  They allow you to implement
> >>>>>>> vhost-user-net, vhost-user-blk, and vhost-user-scsi devices as a
> >>>>>>> separate process from the main emulator.
> >>>> We are working on this direction, but  enhancements to firecracker/rust-vmm are need to support
> >>>> vhostuser. For example we need to support memfd based memory slot management. It’s really
> >>>> great if we could cooperate on it.
> >>> 
> >>> Are you working on it for the hypervisor side, or the device side, or
> >>> both?
> >> Currently we are focusing on the hypervisor side and vhostuser transport layer. No work on the virtio backend device yet.
> > 
> > What application will be the virtio backend on your scenario?
> > 
> 
> Hi Jing,
> 	Net and blk/scsi backends should be enough for most cases.

It would be interesting for us to be able to wire virtio-fs to
firecracker, and it would also be interesting to do a Rust filesystem
client.

Dave

> 
> > Jing
> > 
> >>> 
> >>> Dave
> >>> 
> >>>> 
> >>>>>>> 
> >>>>>>> Stefan
> >>>>>>> _______________________________________________
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> >>>>>> 
> >>>>>> 
> >>>>>> _______________________________________________
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> >>>>> 
> >>>>> 
> >>>>> 
> >>>>> -- 
> >>>>> Marc-André Lureau
> >>>> 
> >>> 
> >>>> _______________________________________________
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> >>>> Rust-vmm at lists.opendev.org
> >>>> http://lists.opendev.org/cgi-bin/mailman/listinfo/rust-vmm
> >>> 
> >>> --
> >>> Dr. David Alan Gilbert / dgilbert at redhat.com / Manchester, UK
> >> _______________________________________________
> >> Rust-vmm mailing list
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> >> http://lists.opendev.org/cgi-bin/mailman/listinfo/rust-vmm
> 
--
Dr. David Alan Gilbert / dgilbert at redhat.com / Manchester, UK