scsi/098: Test F2FS write hint support

common/scsi_debug

@@ -26,6 +26,19 @@ _have_scsi_debug_npo2() {
 	return 1
 }
 
+_have_scsi_debug_group_number_stats() {
+	modprobe -r scsi_debug >&/dev/null
+	if modprobe scsi_debug delay=0 >&/dev/null &&
+		[[ -e /sys/bus/pseudo/drivers/scsi_debug/group_number_stats ]]
+	then
+		modprobe -r scsi_debug >&/dev/null
+		return 0
+	fi
+	SKIP_REASONS+=("scsi_debug does not support group number statistics")
+	modprobe -r scsi_debug >&/dev/null
+	return 1
+}
+
 _scsi_debug_key_path() {
 	local key=${1}
 

tests/scsi/098

@@ -0,0 +1,57 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2022 Google LLC
+
+. tests/zbd/rc
+. common/null_blk
+. common/scsi_debug
+
+DESCRIPTION="test F2FS write hint support"
+QUICK=1
+
+requires() {
+	_have_fio
+	_have_driver f2fs
+	_have_program mkfs.f2fs
+	_have_scsi_debug_group_number_stats
+}
+
+test() {
+	echo "Running ${TEST_NAME}"
+
+	local mount_dir="$TMPDIR/mnt"
+
+	local scsi_debug_params=(
+		delay=0
+		dev_size_mb=1024
+		sector_size=4096
+	)
+	_init_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 "${mount_dir}" &&
+	mount -t f2fs -o whint_mode=fs-based "${dev}" "${mount_dir}" &&
+	local fio_args=(
+		--size=1M
+		--directory="${mount_dir}"
+		--time_based
+		--runtime=10
+	) &&
+	_run_fio_verify_io "${fio_args[@]}" >>"${FULL}" 2>&1 ||
+	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/098.out

@@ -0,0 +1,5 @@
+Running scsi/098
+0
+2
+3
+Test complete