Re: [Qemu-devel] [RFC]virtio-blk: add disk-name device property

[Eric Blake <eblake@redhat.com>]

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On 12/29/2016 08:41 PM, Junkang Fu wrote:
>>From 74e913fc41ea98d1dde692175f1e3fb6729342aa Mon Sep 17 00:00:00 2001
> From: "junkang.fjk" <junkang.fjk@alibaba-inc.com>
> Date: Wed, 24 Aug 2016 19:36:53 +0800
> Subject: [PATCH] virtio-blk: add disk-name device property
> 
> Current virtio-blk disk name(ex. /dev/vdb) has nothing to do with the
> target dev
> name specified in libvirt xml file. For example, we may get disk name
> /dev/vdb in
> VM while target dev specified in libvirt xml is vdc.

It's not really libvirt's fault.  The libvirt XML names are for
convenience, but nothing on the host side requires the guest to pick the
same naming scheme as the host.

I guess your proposal is to enhance the virtio spec such that clients
that are new enough to honor the new addition to the virtio spec will
change their name-picking algorithm to use the name provided by the
host, rather than their current approach of picking whatever name they
feel like, and then enhance libvirt to pass the XML name on down to the
guest?  It might work, but as others have pointed out, it will require a
virtio spec change first.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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