scsi/011: Test whether block and SCSI propagate filesystem data lifetime information

Test whether data lifetime (write hint) information is passed by the block
layer and SCSI core from filesystems to block devices.

Signed-off-by: Bart Van Assche <[email protected]>
[Shin'ichiro: renumbered the test case from 010 to 011]
Signed-off-by: Shin'ichiro Kawasaki <[email protected]>

Author: bvanassche

tests/scsi/011

@@ -0,0 +1,71 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2025 Google LLC
+
+. tests/scsi/rc
+. common/null_blk
+. common/scsi_debug
+
+DESCRIPTION="test data lifetime propagation"
+QUICK=1
+
+requires() {
+	_have_fio
+	_have_driver f2fs
+	# See also commit 7643f3fe2772 ("f2fs: assign the write hint per stream
+	# by default"; v6.10).
+	_have_kver 6 10
+	_have_program mkfs.f2fs
+	_have_scsi_debug_group_number_stats
+}
+
+run_test() {
+	set -e
+
+	local scsi_debug_params=(
+		delay=0
+		dev_size_mb=1024
+		sector_size=4096
+	)
+	_configure_scsi_debug "${scsi_debug_params[@]}"
+	local dev="/dev/${SCSI_DEBUG_DEVICES[0]}" fail
+	ls -ld "${dev}" >>"${FULL}"
+	mkfs.f2fs "${dev}" >>"${FULL}" 2>&1
+	mkdir -p "${mount_dir}"
+	mount -t f2fs "${dev}" "${mount_dir}"
+	local fio_args=(
+		--size=1M
+		--directory="${mount_dir}"
+		--time_based
+		--runtime=10
+	)
+
+	set +e
+
+	_run_fio_verify_io "${fio_args[@]}" >>"${FULL}" 2>&1
+}
+
+test() {
+	echo "Running ${TEST_NAME}"
+
+	# A global variable because it is also used in run_test().
+	mount_dir="$TMPDIR/mnt"
+
+	(
+		run_test
+	) || fail=true
+
+	umount "${mount_dir}" >>"${FULL}" 2>&1
+	head -n 999 /sys/bus/pseudo/drivers/scsi_debug/group_number_stats >> "${FULL}"
+	while read -r group count; do
+		if [ "$count" -gt 0 ]; then echo "$group"; fi
+	done < /sys/bus/pseudo/drivers/scsi_debug/group_number_stats
+	_exit_scsi_debug
+
+	if [ -z "$fail" ]; then
+		echo "Test complete"
+	else
+		echo "Test failed"
+		return 1
+	fi
+}

tests/scsi/011.out

@@ -0,0 +1,6 @@
+Running scsi/011
+0
+1
+2
+3
+Test complete