On Fri, Sep 25, 2020 at 03:32:48PM -0500, Eric Blake wrote: > +The second is related to exposing the source of various extents within > +the image, with a single context named: > + > + qemu:allocation-depth > + > +In the allocation depth context, bits 0 and 1 form a tri-state value: > + > + bits 0-1 clear: NBD_STATE_DEPTH_UNALLOC, means the extent is unallocated > + bit 0 set: NBD_STATE_DEPTH_LOCAL, the extent is allocated in this image > + bit 1 set: NBD_STATE_DEPTH_BACKING, the extent is inherited from a > + backing layer
>From the cover description I imagined it would show the actual depth, ie: top -> backing -> backing -> backing depth: 1 2 3 .... (0 = unallocated) I wonder if that is possible? (Perhaps there's something I don't understand here.) Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org