On Mon, Jun 05, 2023 at 06:41:06PM +0800, Sam Li wrote:
> To configure the zoned format feature on the qcow2 driver, it
> requires following arguments: the device size, zoned profile,
> zoned model, zone size, zone capacity, number of conventional
> zones, limits on zone resources (max append sectors, max open
> zones, and max_active_zones).
>
> To create a qcow2 file with zoned format, use command like this:
> $ qemu-img create -f qcow2 test.qcow2 -o size=768M -o
> zone_size=64M -o zone_capacity=64M -o zone_nr_conv=0 -o
> max_append_sectors=512 -o max_open_zones=0 -o max_active_zones=0
> -o zoned_profile=zbc
>
> Signed-off-by: Sam Li <faithilike...@gmail.com>
> ---
> block/qcow2.c | 119 +++++++++++++++++++++++++++++++
> block/qcow2.h | 21 ++++++
> include/block/block-common.h | 5 ++
> include/block/block_int-common.h | 8 +++
> qapi/block-core.json | 46 ++++++++----
> 5 files changed, 185 insertions(+), 14 deletions(-)
>
...
> diff --git a/block/qcow2.c b/block/qcow2.c
> index 7f3948360d..b886dab42b 100644
> --- a/block/qcow2.c
> +++ b/block/qcow2.c
> @@ -73,6 +73,7 @@ typedef struct {
> #define QCOW2_EXT_MAGIC_CRYPTO_HEADER 0x0537be77
> #define QCOW2_EXT_MAGIC_BITMAPS 0x23852875
> #define QCOW2_EXT_MAGIC_DATA_FILE 0x44415441
> +#define QCOW2_EXT_MAGIC_ZONED_FORMAT 0x7a6264
>
> static int coroutine_fn
> qcow2_co_preadv_compressed(BlockDriverState *bs,
> @@ -210,6 +211,7 @@ qcow2_read_extensions(BlockDriverState *bs, uint64_t
> start_offset,
> uint64_t offset;
> int ret;
> Qcow2BitmapHeaderExt bitmaps_ext;
> + Qcow2ZonedHeaderExtension zoned_ext;
>
> if (need_update_header != NULL) {
> *need_update_header = false;
> @@ -431,6 +433,37 @@ qcow2_read_extensions(BlockDriverState *bs, uint64_t
> start_offset,
> break;
> }
>
> + case QCOW2_EXT_MAGIC_ZONED_FORMAT:
> + {
Missing a patch to docs/interop/qcow2.txt that describes the new
header so that other qcow2 implementations can be interoperable with
it.
[unrelated - maybe we should convert that file to .rst someday?]
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
