Re: [PATCH v14 3/8] block: add block layer APIs resembling Linux ZonedBlockDevice ioctls

[Stefan Hajnoczi]

On Mon, Dec 19, 2022 at 03:29:14PM +0800, Sam Li wrote:
> Add a new zoned_host_device BlockDriver. The zoned_host_device option
> accepts only zoned host block devices. By adding zone management
> operations in this new BlockDriver, users can use the new block
> layer APIs including Report Zone and four zone management operations
> (open, close, finish, reset, reset_all).
> 
> Qemu-io uses the new APIs to perform zoned storage commands of the device:
> zone_report(zrp), zone_open(zo), zone_close(zc), zone_reset(zrs),
> zone_finish(zf).
> 
> For example, to test zone_report, use following command:
> $ ./build/qemu-io --image-opts -n driver=zoned_host_device, 
> filename=/dev/nullb0
> -c "zrp offset nr_zones"
> 
> Signed-off-by: Sam Li <faithilikerun@gmail.com>
> Reviewed-by: Hannes Reinecke <hare@suse.de>
> ---
>  block/block-backend.c             | 147 ++++++++++++
>  block/file-posix.c                | 364 ++++++++++++++++++++++++++++++
>  block/io.c                        |  41 ++++
>  include/block/block-io.h          |   7 +
>  include/block/block_int-common.h  |  21 ++
>  include/block/raw-aio.h           |   6 +-
>  include/sysemu/block-backend-io.h |  18 ++
>  meson.build                       |   4 +
>  qapi/block-core.json              |   8 +-
>  qemu-io-cmds.c                    | 149 ++++++++++++
>  10 files changed, 762 insertions(+), 3 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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