This adds initial support for ZNS by aligning the NVMe spec. defined ZNS
structures and commands with the fio Zone representation and
implementation of the following io-engine functions:
get_zoned_model() / spdk_fio_get_zoned_model(), when namespace is ZNS
and the Zoned-Command-Set is enabled, then this function informs fio
that the device is ZBD_HOST_MANAGED.
report_zones() / spdk_fio_report_zones(), submits a single
zone-mgmt-recv and waits for its completion, converts the spec-defined
zone-descriptors to the fio ZBD_ZONE representation and returns the
number of zones in the converted report.
reset_wp() / spdk_fio_reset_wp(), submits multiple zone-mgmt-send,
covering the range [offset, offset+length] and waits for their
completion.
Four helper-functions are added to assist in the above implementations.
get_fio_qpair(), this helper is added to retrieve the namespace matching
the given fio-file, ensuring that management commands reach the correct
namespace.
spdk_fio_qpair_mdts_nbytes(), this helper is added to assist
report_zones() retrieve the zone-report within the bounds of the
maximum-data-transfer of the device.
The functions pcu() and pcu_cb() provide a means to submit
management-commands and waiting for their completions. They are needed
since, although mgmt-send/recv are IO-commands in the context of NVMe,
then for fio they are not part of the regular queue/event/getevents but
utilized in a synchronous/blocking manner.
Note, in the fio-zone-representation, then the start/len/capacity/wp
fields are in units of bytes, whereas the corresponding values in NVMe
are in lbas/sectors. It is worth noting as the offset <-> lba
conversions do not take NVMe configurations with extended-lba format
into account. Thus, the implementation is initial support for ZNS as
more work is needed to support pi/extended-lba configurations.
Note, a guard FIO_HAS_ZBD checks for the required io-engine ops version
and indirectly testing for available of fio Zone representation by
testing for a macro introduced in the same fio-release as the required
fio Zone representation.
Signed-off-by: Simon A. F. Lund <simon.lund@samsung.com>
Change-Id: Id3d1d61a52db2e55019032c724197df4d559271a
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4836
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
8a1d6f446d