[Libguestfs] [PATCH nbdkit 0/9] [mainly for discussion and early review] Implement extents.

[Richard W.M. Jones]

I want to post this but mainly for discussion and early review.  It's
not safe for these patches to all go upstream yet (because not all
filters have been checked/adjusted), but if any patches were to go
upstream then probably 1 & 2 only are safe.

File, VDDK, memory and data plugins all work, although I have only
done minimal testing on them.

The current tests, such as they are, all pass.  We probably do need
more testing of the extents feature specifically.

I have only tested against qemu (3.1.0) not against any other clients
(if any exist that support this feature?)

For reference the original plan which I'm working to is here:
https://www.redhat.com/archives/libguestfs/2019-March/msg00017.html
https://www.redhat.com/archives/libguestfs/2019-March/msg00021.html

Rich.