On 2020/07/15 15:41, Shin'ichiro Kawasaki wrote:
> For NVMe ZNS and null_blk zoned drives, the zone capacity can be smaller
> than the zone size. To test zone capacity handling by fio for these
> devices, need to know each zone's zone capacity. If the blkzone tool is
> old and does not report zone capacity, t/zbd/test-zbd-support script run
> will fail for the devices.
For NVMe ZNS and null_blk zoned drives, a zone capacity can be smaller
than its size. To test zone capacity handling by fio for these
devices, t/zbd/test-zbd-support must be able to discover zone capacities to
avoid test failures.
>
> To avoid the failures, make zone capacity report by blkzone mandatory if
> the test target device is a ZNS device or a null_blk device.
>
> Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
> ---
> t/zbd/functions | 45 ++++++++++++++++++++++++++++++++++++++++++
> t/zbd/test-zbd-support | 3 +++
> 2 files changed, 48 insertions(+)
>
> diff --git a/t/zbd/functions b/t/zbd/functions
> index 1bd22ec4..344836c8 100644
> --- a/t/zbd/functions
> +++ b/t/zbd/functions
> @@ -19,6 +19,51 @@ if [ -n "${use_libzbc}" ] &&
> exit 1
> fi
>
> +blkzone_reports_capacity() {
> + local dev="${1}"
> +
> + [[ -n "${blkzone}" ]] &&
> + "${blkzone}" report -c 1 -o 0 "${dev}" | grep -q 'cap '
> +}
> +
> +# Whether or not $1 (/dev/...) is a NVME ZNS device.
> +is_nvme_zns() {
> + local s
> +
> + s=/sys/block/$(basename "${1}")/device/subsystem
> +
> + if [[ ! -h "${s}" || $(realpath "${s}") != /sys/class/nvme ]]; then
> + return 1
> + fi
> +
> + [[ $(</sys/block/$(basename "${1}")/queue/zoned) == host-managed ]]
> +}
> +
> +# Whether or not $1 (/dev/...) is a null_blk device with zone capacity smaller
> +# than zone size.
> +is_nullb_with_zone_cap() {
> + local f
> +
> + f=/sys/kernel/config/nullb/$(basename "${1}")
> + [[ -r "${f}/zone_capacity" &&
> + $(<"${f}/zone_capacity") -lt $(<"${f}/zone_size") ]]
> +}
> +
> +# Check if blkzone is available and suitable for the test target device. If not
> +# available, print error message and return 1. Otherwise return 0.
> +check_blkzone() {
> + local dev="${1}"
> +
> + # If the devices supports zone capacity, mandate zone capacity report by
> + # blkzone.
> + if is_nvme_zns "${dev}" || is_nullb_with_zone_cap "${dev}" &&
> + ! blkzone_reports_capacity "${dev}"; then
You need brackets around the or condition here since the AND operation must
consider the value of is_nvme_zns || is_nullb_with_zone_cap.
> + echo "Error: blkzone does not report zone capacity"
> + echo "Error: install latest util-linux with blkzone"
> + return 1
> + fi
> +}
> +
> # Reports the starting sector and length of the first sequential zone of device
> # $1.
> first_sequential_zone() {
> diff --git a/t/zbd/test-zbd-support b/t/zbd/test-zbd-support
> index 80dc3f30..f086bd10 100755
> --- a/t/zbd/test-zbd-support
> +++ b/t/zbd/test-zbd-support
> @@ -863,6 +863,9 @@ if [[ -b "$realdev" ]]; then
> case "$(<"/sys/class/block/$basename/queue/zoned")" in
> host-managed|host-aware)
> is_zbd=true
> + if ! check_blkzone "${dev}"; then
> + exit 1
> + fi
> if ! result=($(first_sequential_zone "$dev")); then
> echo "Failed to determine first sequential zone"
> exit 1
>
--
Damien Le Moal
Western Digital Research
