[dm-devel] [PATCH 14/14] dm-zoned: metadata version 2

[Mike Snitzer]

On Fri, May 08 2020 at  5:03am -0400,
Hannes Reinecke <hare at suse.de> wrote:

> Implement handling for metadata version 2. The new metadata adds
> a label and UUID for the device mapper device, and additional UUID
> for the underlying block devices.
> It also allows for an additional regular drive to be used for
> emulating random access zones. The emulated zones will be placed
> logically in front of the zones from the zoned block device, causing
> the superblocks and metadata to be stored on that device.
> The first zone of the original zoned device will be used to hold
> another, tertiary copy of the metadata; this copy carries a
> generation number of 0 and is never updated; it's just used
> for identification.
> 
> Signed-off-by: Hannes Reinecke <hare at suse.de>
> Reviewed-by: Bob Liu <bob.liu at oracle.com>

Noticing some changes layered ontop of what I expected (your previous
version + Damien's changes [1] folded in).

The changelog on the 0th header doesn't really speak to the changes I'm
seeing.  Is it worth enumerating them to ease incremental review?
Damien?

[1] https://www.redhat.com/archives/dm-devel/2020-April/msg00273.html

Thanks,
Mike