Re: [Qemu-devel] [PATCH] xen-upstream-qemu: get vncpassword through xenstore, enable VNC_AUTH_VNC

[Stefano Stabellini]

On Thu, 21 Apr 2011, ZhouPeng wrote:
> Thank you for your review.
> 
> Does this means the xen-upsteam-qemu will give up xenstore?
> 
> Many features of xen except for vncpasswd
> may need that xl send||receive msg to||from xen-qemu.
> I think some other part of xen may need to read xenstore which may be
> updated by qemu.
> xenstore's sharing characteristic give much convenience for many-way
> msg communication,
> but the RPC may only give single-way.
> 
> So I am somewhat in doubt xen-upstream-qemu will give up xenstore.
> 
> IMO, I don't think qemu may accept xenstore's code only used by xen,
> 
> except
> qemu need to add a new general shared many-way msg exchange mechanism,
> like xenstore database.
> 

Even though a "QMP bus" could be useful, I don't think there is anything
like that at the moment.
Also considering that each qemu instance takes care of a single guest,
the usefulness of such a mechanism is reduced.

Anyhow in this particular case using QMP seems appropriate: I would
welcome patches to add QMP support to libxenlight, even though I realize
that it is a bigger effort than this single patch.