[Libguestfs] [PATCH nbdkit v5 FINAL 00/19] Implement extents.

[Eric Blake]

On 3/28/19 11:18 AM, Richard W.M. Jones wrote:
> This has already been pushed upstream.  I am simply posting these here
> so we have a reference in the mailing list in case we find bugs later
> (as I'm sure we will - it's a complex patch series).
> 
> Great thanks to Eric Blake for tireless review on this one.  It also
> seems to have identified a few minor bugs in qemu along the way.
> 

Should nbdkit-rate-filter.pod mention that extents is considered
effectively free (same as zeroing and trimming)?

I know that I want the nbd plugin to do extents passthrough, but I have
some work to do to teach it do to NBD_OPT_GO/structured replies first.

The full and null plugins should probably have a trivial .extents that
reports completely sparse, all of the time :)

Various plugins like partitioning and linuxdisk might be interesting to
support extents on (particularly since we know we pad in between files);
but it may be trickier to write.

Can curl or ssh access extents information?

Language bindings will also be an interesting exercise ;)

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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