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block/block-backend: add block layer APIs resembling Linux ZonedBlockDevice ioctls

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Add zoned device option to host_device BlockDriver. It will be presented only
for zoned host block devices. By adding zone management operations to the
host_block_device 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=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>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20230508045533.175575-4-faithilikerun@gmail.com
Message-id: 20230324090605.28361-4-faithilikerun@gmail.com
[Adjust commit message prefix as suggested by Philippe Mathieu-Daudé
<philmd@linaro.org> and remove spurious ret = -errno in
raw_co_zone_mgmt().
--Stefan]
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Sam Li 2023-05-08 12:55:28 +08:00 • committed by Stefan Hajnoczi
parent a735b56e49
commit 6d43eaa396
9 changed files with 696 additions and 3 deletions
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21
include/block/block_int-common.h
View file

@ -713,6 +713,12 @@ struct BlockDriver {
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_load_vmstate)(
BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
int coroutine_fn (*bdrv_co_zone_report)(BlockDriverState *bs,
int64_t offset, unsigned int *nr_zones,
BlockZoneDescriptor *zones);
int coroutine_fn (*bdrv_co_zone_mgmt)(BlockDriverState *bs, BlockZoneOp op,
int64_t offset, int64_t len);
/* removable device specific */
bool coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_is_inserted)(
BlockDriverState *bs);
@ -865,6 +871,21 @@ typedef struct BlockLimits {
/* device zone model */
BlockZoneModel zoned;
/* zone size expressed in bytes */
uint32_t zone_size;
/* total number of zones */
uint32_t nr_zones;
/* maximum sectors of a zone append write operation */
uint32_t max_append_sectors;
/* maximum number of open zones */
uint32_t max_open_zones;
/* maximum number of active zones */
uint32_t max_active_zones;
} BlockLimits;
typedef struct BdrvOpBlocker BdrvOpBlocker;