Re: [PATCH v2 4/9] block: Remove partition support for zoned block devices

[Hannes Reinecke <hare@suse.de>]

On 11/11/19 3:39 AM, Damien Le Moal wrote:
> No known partitioning tool supports zoned block devices, especially the
> host managed flavor with strong sequential write constraints.
> Furthermore, there are also no known user nor use cases for partitioned
> zoned block devices.
> 
> This patch removes partition device creation for zoned block devices,
> which allows simplifying the processing of zone commands for zoned
> block devices. A warning is added if a partition table is found on the
> device.
> 
> For report zones operations no zone sector information remapping is
> necessary anymore, simplifying the code. Of note is that remapping of
> zone reports for DM targets is still necessary as done by
> dm_remap_zone_report().
> 
> Similarly, remaping of a zone reset bio is not necessary anymore.
> Testing for the applicability of the zone reset all request also becomes
> simpler and only needs to check that the number of sectors of the
> requested zone range is equal to the disk capacity.
> 
> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> ---
>  block/blk-core.c          |  6 +---
>  block/blk-zoned.c         | 62 ++++++--------------------------
>  block/partition-generic.c | 74 +++++----------------------------------
>  drivers/md/dm.c           |  3 --
>  4 files changed, 21 insertions(+), 124 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      Teamlead Storage & Networking
hare@suse.de			                  +49 911 74053 688
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