libvirt users - May 2021 - How to hot plugin a new vhost-user-blk-pci device to running VM?

Thanks all of you for your help.
One more question regarding  vhost-user-blk-pci type device,  how to identify a
vhost-blk disk in QEUM VM ?  for example, disk name looks like vda,vdb,..., but
that some application in VM want to detect  that a certain entry is really the
device it is waiting for. Specific for windows , they always show as disk 0, 1,
2?.etc
Is there any way to identify those disk with each other in VM?

thanks

> ? 2021?5?17????3:13?Michal Pr?vozn?k <mprivozn at redhat.com> ???
> 
> On 5/17/21 7:08 AM, Liang Chaojun wrote:
>> 
>> Thanks Michal and Peter for your response. I? m running it on qemu 5.1
build by myself. BTW, follow Peter?s suggestion, where I can get the latest rpms
if I want to upgrade to Libvirt 7.1? As I know it seems need more than twenty
related rpms not include dependency.
> 
> Well, since you're building qemu yourself you could also build libvirt.
> Just be aware that the v7.3.0 release was the last one that supports
> RHEL-7. Newer releases might still work, but upstream does not aim to
> make everything work.
> 
> https://libvirt.org/platforms.html
> 
> Michal
> 
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On 5/21/21 5:28 PM, ??? wrote:
> Thanks all of you for your help.
> One more question regarding  vhost-user-blk-pci type device,  how to
identify a vhost-blk disk in QEUM VM ?  for example, disk name looks like
vda,vdb,..., but that some application in VM want to detect  that a certain
entry is really the device it is waiting for. Specific for windows , they always
show as disk 0, 1, 2?.etc
> Is there any way to identify those disk with each other in VM?
In general no. Usually disks will be enumerated sequentially - thus the
first disk on a sata/scsi/usb/.. bus will be sda, the second will be
sdb, and so on. But libvirt can't guarantee it - the same way you can't
guarantee how a disk is going to be called with real HW.

Michal