Add a new zone state to represent an explicit open zone.
Many zoned specifications like ZBC/ZAC/ZNS have two different
zone states to represent an open zone: explicit open and
implicit open.
In e.g. ZNS, a zone is transitioned to explicit open when a
Zone Management Send is sent with a zone send action of open zone.
In ZNS, writing to e.g. an empty or closed zone, without first
sending a zone send action of open zone, will instead transition
the zone to implicit open.
The OCSSD specification only has a single open zone state.
In OCSSD, you can only transition to the open state by doing a write.
There is no separate function call to transition a zone to the open
state. Therefore, the OCSSD open state is most similar to the ZNS
implicit open state.
Since we cannot remove the SPDK_BDEV_ZONE_STATE_OPEN identifier,
for backwards compatibility reasons, make the SPDK_BDEV_ZONE_STATE_OPEN
identifier an alias to the new SPDK_BDEV_ZONE_STATE_IMP_OPEN identifier.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Change-Id: I98f3a280cd9e595100155568a3c0332c667a834b
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/6907
Community-CI: Broadcom CI
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
82d797af1a