[libvirt] RFC: disk tray opened event and changing media API cooperation

[Nikolay Shirokovskiy]

ping

On 29.06.2016 15:12, Nikolay Shirokovskiy wrote:
>  Hi, all.
> 
>   I want to remove media if disk is ejected from guest. I can leverage tray
> opened event for it but this event generated if i change media thru API call
> too. Thus I can't just remove media on any such event. However it would be
> possible if libvirt do not propagate tray opened event that originates from
> qemuDomainUpdateDeviceFlags actions. On this way we need also to close tray
> back if it was originally closed so state visible to client is in sync with
> actual. I can imagine other cases when closing tray at the end of
> qemuDomainUpdateDeviceFlags will be useful. Say implementing a kind of changer
> in mgmt layer so that if guest ejects disk mgmt insert next media from some
> playlist. In this case tray should be closed so that guest will see that media
> is changed.
> 
>   In short I suggest:
> 
> 1. close tray at the end of chaning/ejecting media
> 2. if tray is opened during the operation than mask this event from client
> 
> Nikolay
> 
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