[PATCH blktests 14/14] zbd/005: Test write ordering

[Damien Le Moal <damien.lemoal@wdc.com>]

From: Masato Suzuki <masato.suzuki@wdc.com>

Run a high queue depth direct sequential write fio job to check that
write requests are not being reordered when the deadline scheduler is
used. This test allowed to catch a bug fixed with commit
80e02039721 "block: mq-deadline: Fix write completion handling".

Signed-off-by: Masato Suzuki <masato.suzuki@wdc.com>
---
 tests/zbd/005     | 57 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/zbd/005.out |  2 ++
 2 files changed, 59 insertions(+)
 create mode 100755 tests/zbd/005
 create mode 100644 tests/zbd/005.out

diff --git a/tests/zbd/005 b/tests/zbd/005
new file mode 100755
index 0000000..7b38462
--- /dev/null
+++ b/tests/zbd/005
@@ -0,0 +1,57 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2018 Western Digital Corporation or its affiliates.
+#
+# Test zoned block device write ordering. Run simultaneous write operations
+# to a single zone and confirm no write ordering failure.
+# It checks fix by commit 80e02039721 ("block: mq-deadline: Fix write
+# completion handling").
+
+. tests/zbd/rc
+
+DESCRIPTION="write command ordering"
+TIMED=1
+
+requires() {
+	_have_fio
+}
+
+_find_first_sequential_zone() {
+	for ((idx =  NR_CONV_ZONES; idx < REPORTED_COUNT; idx++)); do
+		if [[ ${ZONE_TYPES[idx]} -eq ${ZONE_TYPE_SEQ_WRITE_REQUIRED} ]];
+		then
+			echo "${idx}"
+			return 0
+		fi
+	done
+	echo "Sequential write required zone not found"
+
+	return 1
+}
+
+test_device() {
+	local -i zone_idx
+	local -i offset
+
+	echo "Running ${TEST_NAME}"
+
+	_get_sysfs_variable "${TEST_DEV}" || return $?
+	_get_blkzone_report "${TEST_DEV}" || return $?
+
+	zone_idx=$(_find_first_sequential_zone) || return $?
+	offset=$((ZONE_STARTS[zone_idx] * 512))
+
+	blkzone reset -o "${ZONE_STARTS[zone_idx]}" "${TEST_DEV}"
+
+	: "${TIMEOUT:=30}"
+	set_scheduler "$(basename "$(readlink -f "${TEST_DEV}")")" deadline
+	FIO_PERF_FIELDS=("write io" "write iops")
+	_fio_perf --filename="${TEST_DEV}" --name zbdwo --rw=write --direct=1 \
+		  --ioengine=libaio --iodepth=128 --bs=256k \
+		  --offset="${offset}"
+
+	_put_blkzone_report
+	_put_sysfs_variable
+
+	echo "Test complete"
+}
diff --git a/tests/zbd/005.out b/tests/zbd/005.out
new file mode 100644
index 0000000..3ff78c6
--- /dev/null
+++ b/tests/zbd/005.out
@@ -0,0 +1,2 @@
+Running zbd/005
+Test complete
-- 
2.20.1