[PATCH blktests 2/2] nvme/049: add fio md_per_io_size option

[Shin'ichiro Kawasaki]

When TEST_DEV namespace has a format with metadata, fio workloads with
io_uring_cmd engine errors out with the message "md_per_io_size should
be at least 64 bytes". To avoid the failure, add the option
--md_per_io_size to the fio workloads.

Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki at wdc.com>
Cc: Kanchan Joshi <joshi.k at samsung.com>
---
 tests/nvme/049 | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tests/nvme/049 b/tests/nvme/049
index 7304d66..70a6d11 100755
--- a/tests/nvme/049
+++ b/tests/nvme/049
@@ -15,6 +15,15 @@ requires() {
 	_have_fio_ver 3 33
 }
 
+metadata_bytes_per_4k_io() {
+	local phys_bs md_bytes
+
+	phys_bs=$(<"${TEST_DEV_SYSFS}"/queue/physical_block_size)
+	md_bytes=$(<"${TEST_DEV_SYSFS}"/metadata_bytes)
+
+	echo $((4096 * md_bytes / phys_bs))
+}
+
 test_device() {
 	echo "Running ${TEST_NAME}"
 
@@ -23,6 +32,7 @@ test_device() {
 	local target_size=4096
 	local common_args=()
 	local fio_output
+	local md_io_bytes
 
 	test_dev_bs=$(_min_io "$ngdev")
 	common_args=(
@@ -39,6 +49,9 @@ test_device() {
 		--runtime=2
 	)
 
+	md_io_bytes=$(metadata_bytes_per_4k_io)
+	((md_io_bytes)) && common_args+=(--md_per_io_size="${md_io_bytes}")
+
 	((test_dev_bs > target_size)) && target_size=$test_dev_bs
 
 	# check security permission
-- 
2.49.0