#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2017-2018 Western Digital Corporation or its affiliates.
#
# Test NVMeOF flush command from host with a file backed ns.

. tests/nvme/rc

DESCRIPTION="unit test for NVMe flush for file backed ns"
QUICK=1

requires() {
	_have_program nvme && _have_modules loop nvme-loop && _have_configfs
}

test() {
	echo "Running ${TEST_NAME}"

	modprobe nvmet
	modprobe nvme-loop

	local port
	local nvmedev
	local file_path="$TMPDIR/img"
	local subsys_name="blktests-subsystem-1"

	truncate -s 1G "${file_path}"

	_create_nvmet_subsystem "${subsys_name}" "${file_path}" \
		 "91fdba0d-f87b-4c25-b80f-db7be1418b9e"
	port="$(_create_nvmet_port "loop")"
	_add_nvmet_subsys_to_port "${port}" "${subsys_name}"

	nvme connect -t loop -n "${subsys_name}"

	nvmedev="$(_find_nvme_loop_dev)"
	cat "/sys/block/${nvmedev}n1/uuid"
	cat "/sys/block/${nvmedev}n1/wwid"

	dd if=/dev/urandom of="/dev/${nvmedev}n1" count=128000 bs=4k status=none

	nvme flush "/dev/${nvmedev}" -n 1

	nvme disconnect -n "${subsys_name}"

	_remove_nvmet_subsystem_from_port "${port}" "${subsys_name}"
	_remove_nvmet_subsystem "${subsys_name}"
	_remove_nvmet_port "${port}"

	rm "${file_path}"

	echo "Test complete"
}
