[libvirt] New QEMU daemon for persistent reservations

[Paolo Bonzini]

On 03/10/2017 17:59, Michal Privoznik wrote:
> Ah, this breaks my design. I guess
> 
>   <disk>
>     <pr>
>       <source type='unix' path='/path/to/qemu-pr-helper' mode='server'/>
>     </pr>
>   </disk>
> 
> is pure madness, isn't it?

Yes, but OTOH if libvirtd starts the daemon, nobody cares about the
source type, so perhaps

   <pr driver='helper' mode='shared'>
     <source ... />
   </pr>

(mandatory source) vs.

   <pr driver='helper' mode='private'>
     <path>/path/to/qemu-pr-helper</path>
   </pr>

(optional path, default from global configuration) vs.

   <pr driver='passthrough'/>

(no helper)?

Paolo