Re: [Qemu-devel] [PATCH v4 0/6] Efficient VM backup for qemu

[Dietmar Maurer]

> > Sure.  nbd+unix:///exportname?socket=path is the new URI syntax, I
> > honestly forgot the old one.  SCM_CREDENTIALS checks (qemu-nbd --pid
> > or something like that) is not supported, but patches would be very welcome.
> 
> Yes, this is better than my tcp suggestion.

So if I want to use the code from nbd.c, I need to write a specialized 
BlockDriver
for the vma format (to pass that to nbd_export_new())?