#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) Linux Test Project, 2014-2022
# Author: Cyril Hrubis <chrubis@suse.cz>
#
# LTP test library for shell.

[ -n "$TST_LIB_LOADED" ] && return 0

export TST_PASS=0
export TST_FAIL=0
export TST_BROK=0
export TST_WARN=0
export TST_CONF=0
export TST_COUNT=1
export TST_ITERATIONS=1
export TST_TMPDIR_RHOST=0
export TST_LIB_LOADED=1

if [ -z "$TST_FS_TYPE" ]; then
	export TST_FS_TYPE="${LTP_DEV_FS_TYPE:-ext2}"
fi

. tst_ansi_color.sh
. tst_security.sh

# default trap function
trap "tst_brk TBROK 'test interrupted'" INT
trap "unset _tst_setup_timer_pid; tst_brk TBROK 'test terminated'" TERM

_tst_do_cleanup()
{
	if [ -n "$TST_DO_CLEANUP" -a -n "$TST_CLEANUP" -a -z "$LTP_NO_CLEANUP" ]; then
		if command -v $TST_CLEANUP >/dev/null 2>/dev/null; then
			TST_DO_CLEANUP=
			$TST_CLEANUP
		else
			tst_res TWARN "TST_CLEANUP=$TST_CLEANUP declared, but function not defined (or cmd not found)"
		fi
	fi
	TST_DO_CLEANUP=
}

_tst_do_exit()
{
	local ret=0
	TST_DO_EXIT=1

	_tst_do_cleanup

	cd "$LTPROOT"
	[ "$TST_MOUNT_FLAG" = 1 ] && tst_umount

	if [ "$TST_NEEDS_DEVICE" = 1 -a "$TST_DEVICE_FLAG" = 1 ]; then
		if ! tst_device release "$TST_DEVICE"; then
			tst_res TWARN "Failed to release device '$TST_DEVICE'"
		fi
	fi

	if [ "$TST_NEEDS_TMPDIR" = 1 -a -n "$TST_TMPDIR" ]; then
		rm -r "$TST_TMPDIR"
		[ "$TST_TMPDIR_RHOST" = 1 ] && tst_cleanup_rhost
	fi

	if [ -n "$TST_NEEDS_CHECKPOINTS" -a -f "$LTP_IPC_PATH" ]; then
		rm $LTP_IPC_PATH
	fi

	_tst_cleanup_timer

	if [ $TST_FAIL -gt 0 ]; then
		ret=$((ret|1))
	fi

	if [ $TST_BROK -gt 0 ]; then
		ret=$((ret|2))
	fi

	if [ $TST_WARN -gt 0 ]; then
		ret=$((ret|4))
	fi

	if [ $TST_CONF -gt 0 -a $TST_PASS -eq 0 ]; then
		ret=$((ret|32))
	fi

	if [ $TST_BROK -gt 0 -o $TST_FAIL -gt 0 -o $TST_WARN -gt 0 ]; then
		_tst_check_security_modules
	fi

	cat >&2 << EOF

Summary:
passed   $TST_PASS
failed   $TST_FAIL
broken   $TST_BROK
skipped  $TST_CONF
warnings $TST_WARN
EOF

	exit $ret
}

_tst_inc_res()
{
	case "$1" in
	TPASS) TST_PASS=$((TST_PASS+1));;
	TFAIL) TST_FAIL=$((TST_FAIL+1));;
	TBROK) TST_BROK=$((TST_BROK+1));;
	TWARN) TST_WARN=$((TST_WARN+1));;
	TCONF) TST_CONF=$((TST_CONF+1));;
	TINFO) ;;
	*) tst_brk TBROK "Invalid res type '$1'";;
	esac
}

tst_res()
{
	local res=$1
	shift

	_tst_inc_res "$res"

	printf "$TST_ID $TST_COUNT " >&2
	tst_print_colored $res "$res: " >&2
	echo "$@" >&2
}

tst_brk()
{
	local res=$1
	shift

	# TBROK => TWARN on cleanup or exit
	if [ "$res" = TBROK ] && [ "$TST_DO_EXIT" = 1 -o -z "$TST_DO_CLEANUP" -a -n "$TST_CLEANUP" ]; then
		tst_res TWARN "$@"
		TST_DO_CLEANUP=
		return
	fi

	if [ "$res" != TBROK -a "$res" != TCONF ]; then
		tst_res TBROK "tst_brk can be called only with TBROK or TCONF ($res)"
	else
		tst_res "$res" "$@"
	fi

	_tst_do_exit
}

ROD_SILENT()
{
	local tst_out

	tst_out="$(tst_rod $@ 2>&1)"
	if [ $? -ne 0 ]; then
		echo "$tst_out"
		tst_brk TBROK "$@ failed"
	fi
}

ROD()
{
	tst_rod "$@"
	if [ $? -ne 0 ]; then
		tst_brk TBROK "$@ failed"
	fi
}

_tst_expect_pass()
{
	local fnc="$1"
	shift

	tst_rod "$@"
	if [ $? -eq 0 ]; then
		tst_res TPASS "$@ passed as expected"
		return 0
	else
		$fnc TFAIL "$@ failed unexpectedly"
		return 1
	fi
}

_tst_expect_fail()
{
	local fnc="$1"
	shift

	# redirect stderr since we expect the command to fail
	tst_rod "$@" 2> /dev/null
	if [ $? -ne 0 ]; then
		tst_res TPASS "$@ failed as expected"
		return 0
	else
		$fnc TFAIL "$@ passed unexpectedly"
		return 1
	fi
}

EXPECT_PASS()
{
	_tst_expect_pass tst_res "$@"
}

EXPECT_PASS_BRK()
{
	_tst_expect_pass tst_brk "$@"
}

EXPECT_FAIL()
{
	_tst_expect_fail tst_res "$@"
}

EXPECT_FAIL_BRK()
{
	_tst_expect_fail tst_brk "$@"
}

TST_RETRY_FN_EXP_BACKOFF()
{
	local tst_fun="$1"
	local tst_exp=$2
	local tst_sec=$(($3 * 1000000))
	local tst_delay=1

	_tst_multiply_timeout tst_sec

	if [ $# -ne 3 ]; then
		tst_brk TBROK "TST_RETRY_FN_EXP_BACKOFF expects 3 parameters"
	fi

	if ! tst_is_int "$tst_sec"; then
		tst_brk TBROK "TST_RETRY_FN_EXP_BACKOFF: tst_sec must be integer ('$tst_sec')"
	fi

	while true; do
		eval "$tst_fun"
		if [ "$?" = "$tst_exp" ]; then
			break
		fi

		if [ $tst_delay -lt $tst_sec ]; then
			tst_sleep ${tst_delay}us
			tst_delay=$((tst_delay*2))
		else
			tst_brk TBROK "\"$tst_fun\" timed out"
		fi
	done

	return $tst_exp
}

TST_RETRY_FUNC()
{
	if [ $# -ne 2 ]; then
		tst_brk TBROK "TST_RETRY_FUNC expects 2 parameters"
	fi

	TST_RETRY_FN_EXP_BACKOFF "$1" "$2" 1
	return $2
}

TST_RTNL_CHK()
{
	local msg1="RTNETLINK answers: Function not implemented"
	local msg2="RTNETLINK answers: Operation not supported"
	local msg3="RTNETLINK answers: Protocol not supported"
	local output="$($@ 2>&1 || echo 'LTP_ERR')"
	local msg

	echo "$output" | grep -q "LTP_ERR" || return 0

	for msg in "$msg1" "$msg2" "$msg3"; do
		echo "$output" | grep -q "$msg" && tst_brk TCONF "'$@': $msg"
	done

	tst_brk TBROK "$@ failed: $output"
}

TST_CHECKPOINT_WAIT()
{
	ROD tst_checkpoint wait 10000 "$1"
}

TST_CHECKPOINT_WAKE()
{
	ROD tst_checkpoint wake 10000 "$1" 1
}

TST_CHECKPOINT_WAKE2()
{
	ROD tst_checkpoint wake 10000 "$1" "$2"
}

TST_CHECKPOINT_WAKE_AND_WAIT()
{
	TST_CHECKPOINT_WAKE "$1"
	TST_CHECKPOINT_WAIT "$1"
}

tst_mount()
{
	local mnt_opt mnt_err mnt_real

	if [ -n "$TST_FS_TYPE" ]; then
		mnt_opt="-t $TST_FS_TYPE"
		mnt_err=" $TST_FS_TYPE type"
	fi
	local cmd="mount $mnt_opt $TST_DEVICE $TST_MNTPOINT $TST_MNT_PARAMS"

	ROD_SILENT mkdir -p $TST_MNTPOINT
	tst_res TINFO "Mounting device: $cmd"
	$cmd
	local ret=$?

	if [ $ret -eq 32 ]; then
		tst_brk TCONF "Cannot mount${mnt_err}, missing driver?"
	fi

	if [ $ret -ne 0 ]; then
		tst_brk TBROK "Failed to mount device${mnt_err}: mount exit = $ret"
	fi
}

tst_umount()
{
	local mntpoint="${1:-$TST_MNTPOINT}"
	local i=0

	[ -z "$mntpoint" ] && return

	if ! echo "$mntpoint" | grep -q ^/; then
		tst_brk TCONF "The '$mntpoint' is not an absolute path"
	fi

	if ! grep -q "${mntpoint%/}" /proc/mounts; then
		tst_res TINFO "The '$mntpoint' is not mounted, skipping umount"
		return
	fi

	while [ "$i" -lt 50 ]; do
		if umount "$mntpoint" > /dev/null; then
			return
		fi

		i=$((i+1))

		tst_res TINFO "umount($mntpoint) failed, try $i ..."
		tst_res TINFO "Likely gvfsd-trash is probing newly mounted "\
		              "fs, kill it to speed up tests."

		tst_sleep 100ms
	done

	tst_res TWARN "Failed to umount($mntpoint) after 50 retries"
}

tst_mkfs()
{
	local opts
	local fs_type=${1:-$TST_FS_TYPE}
	[ $# -ge 1 ] && shift

	opts="$@"

	if [ "$fs_type" = tmpfs ]; then
		tst_res TINFO "Skipping mkfs for TMPFS filesystem"
		return
	fi

	if [ -z "$opts" ]; then
		if [ "$TST_NEEDS_DEVICE" != 1 ]; then
			tst_brk "Using default parameters in tst_mkfs requires TST_NEEDS_DEVICE=1"
		fi
		opts="$TST_DEVICE"
	fi

	tst_require_cmds mkfs.$fs_type

	tst_res TINFO "Formatting $fs_type with opts='$opts'"
	ROD_SILENT mkfs.$fs_type $opts
}

# Detect whether running under hypervisor: Microsoft Hyper-V
# Return 0: running under Hyper-V
# Return 1: not running under Hyper-V (bare metal, other hypervisor or
#           failure of detection)
tst_virt_hyperv()
{
	local v

	tst_cmd_available systemd-detect-virt || return 1

	v="$(systemd-detect-virt)"

	[ $? -eq 0 ] || return 1
	[ "$v" = "microsoft" ] || return 1

	return 0
}

tst_cmd_available()
{
	command -v $1 >/dev/null 2>&1
}

tst_require_cmds()
{
	local cmd
	for cmd in $*; do
		tst_cmd_available $cmd || tst_brk TCONF "'$cmd' not found"
	done
}

tst_check_cmds()
{
	local cmd
	for cmd in $*; do
		if ! tst_cmd_available $cmd; then
			tst_res TCONF "'$cmd' not found"
			return 1
		fi
	done
	return 0
}

tst_require_drivers()
{
	[ $# -eq 0 ] && return 0

	local drv

	drv="$(tst_check_drivers $@ 2>&1)"

	[ $? -ne 0 ] && tst_brk TCONF "$drv driver not available"
	return 0
}

tst_require_kconfigs()
{
	local delim

	if [ $# -gt 2 ]; then
		return 0
	elif [ $# -eq 1 ]; then
		delim="$TST_NEEDS_KCONFIGS_IFS"
	else
		delim="$2"
	fi

	[ -z "$1" ] && return 0

	tst_check_kconfigs "$1" "$delim" > /dev/null

	[ $? -ne 0 ] && tst_brk TCONF "Aborting due to unsuitable kernel config, see above!"
	return 0
}

tst_is_int()
{
	[ "$1" -eq "$1" ] 2>/dev/null
	return $?
}

tst_is_num()
{
	echo "$1" | grep -Eq '^[-+]?[0-9]+\.?[0-9]*$'
}

tst_usage()
{
	if [ -n "$TST_USAGE" ]; then
		$TST_USAGE
	else
		echo "usage: $0"
		echo
		echo "Options"
		echo "-------"
	fi

	echo "-h      Prints this help"
	echo "-i n    Execute test n times"

	cat << EOF

Environment Variables
---------------------
KCONFIG_PATH         Specify kernel config file
KCONFIG_SKIP_CHECK   Skip kernel config check if variable set (not set by default)
LTPROOT              Prefix for installed LTP (default: /opt/ltp)
LTP_COLORIZE_OUTPUT  Force colorized output behaviour (y/1 always, n/0: never)
LTP_DEV              Path to the block device to be used (for .needs_device)
LTP_DEV_FS_TYPE      Filesystem used for testing (default: ext2)
LTP_SINGLE_FS_TYPE   Testing only - specifies filesystem instead all supported (for TST_ALL_FILESYSTEMS=1)
LTP_TIMEOUT_MUL      Timeout multiplier (must be a number >=1, ceiled to int)
TMPDIR               Base directory for template directory (for .needs_tmpdir, default: /tmp)
EOF
}

_tst_resstr()
{
	echo "$TST_PASS$TST_FAIL$TST_CONF"
}

_tst_rescmp()
{
	local res=$(_tst_resstr)

	if [ "$1" = "$res" ]; then
		tst_brk TBROK "Test didn't report any results"
	fi
}

_tst_multiply_timeout()
{
	[ $# -ne 1 ] && tst_brk TBROK "_tst_multiply_timeout expect 1 parameter"
	eval "local timeout=\$$1"

	LTP_TIMEOUT_MUL=${LTP_TIMEOUT_MUL:-1}

	local err="LTP_TIMEOUT_MUL must be number >= 1!"

	tst_is_num "$LTP_TIMEOUT_MUL" || tst_brk TBROK "$err ($LTP_TIMEOUT_MUL)"

	if ! tst_is_int "$LTP_TIMEOUT_MUL"; then
		LTP_TIMEOUT_MUL=$(echo "$LTP_TIMEOUT_MUL" | cut -d. -f1)
		LTP_TIMEOUT_MUL=$((LTP_TIMEOUT_MUL+1))
		tst_res TINFO "ceiling LTP_TIMEOUT_MUL to $LTP_TIMEOUT_MUL"
	fi

	[ "$LTP_TIMEOUT_MUL" -ge 1 ] || tst_brk TBROK "$err ($LTP_TIMEOUT_MUL)"
	[ "$timeout" -ge 1 ] || tst_brk TBROK "timeout need to be >= 1 ($timeout)"

	eval "$1='$((timeout * LTP_TIMEOUT_MUL))'"
	return 0
}

_tst_cleanup_timer()
{
	if [ -n "$_tst_setup_timer_pid" ]; then
		kill -TERM $_tst_setup_timer_pid 2>/dev/null
		# kill is successful only on test timeout
		wait $_tst_setup_timer_pid 2>/dev/null || true
	fi
}

_tst_setup_timer()
{
	TST_TIMEOUT=${TST_TIMEOUT:-300}

	if [ "$TST_TIMEOUT" = -1 ]; then
		tst_res TINFO "Timeout per run is disabled"
		return
	fi

	if ! tst_is_int "$TST_TIMEOUT" || [ "$TST_TIMEOUT" -lt 1 ]; then
		tst_brk TBROK "TST_TIMEOUT must be int >= 1! ($TST_TIMEOUT)"
	fi

	local sec=$TST_TIMEOUT
	_tst_multiply_timeout sec
	local h=$((sec / 3600))
	local m=$((sec / 60 % 60))
	local s=$((sec % 60))
	local pid=$$

	tst_res TINFO "timeout per run is ${h}h ${m}m ${s}s"

	_tst_cleanup_timer

	tst_timeout_kill $sec $pid &

	_tst_setup_timer_pid=$!

	while true; do
		local state

		state=$(cut -d' ' -f3 "/proc/$_tst_setup_timer_pid/stat")

		if [ "$state" = "S" ]; then
			break;
		fi

		tst_sleep 1ms
	done
}

tst_require_root()
{
	if [ "$(id -ru)" != 0 ]; then
		tst_brk TCONF "Must be super/root for this test!"
	fi
}

tst_require_module()
{
	local _tst_module=$1

	for tst_module in "$_tst_module" \
	                  "$LTPROOT/testcases/bin/$_tst_module" \
	                  "$TST_STARTWD/$_tst_module"; do

			if [ -f "$tst_module" ]; then
				TST_MODPATH="$tst_module"
				break
			fi
	done

	if [ -z "$TST_MODPATH" ]; then
		tst_brk TCONF "Failed to find module '$_tst_module'"
	fi

	tst_res TINFO "Found module at '$TST_MODPATH'"
}

tst_set_timeout()
{
	TST_TIMEOUT="$1"
	_tst_setup_timer
}

_tst_init_checkpoints()
{
	local pagesize

	LTP_IPC_PATH="/dev/shm/ltp_${TST_ID}_$$"
	pagesize=$(tst_getconf PAGESIZE)
	if [ $? -ne 0 ]; then
		tst_brk TBROK "tst_getconf PAGESIZE failed"
	fi
	ROD_SILENT dd if=/dev/zero of="$LTP_IPC_PATH" bs="$pagesize" count=1
	ROD_SILENT chmod 600 "$LTP_IPC_PATH"
	export LTP_IPC_PATH
}

_prepare_device()
{
	if [ "$TST_FORMAT_DEVICE" = 1 ]; then
		tst_device clear "$TST_DEVICE"
		tst_mkfs $TST_FS_TYPE $TST_DEV_FS_OPTS $TST_DEVICE $TST_DEV_EXTRA_OPTS
	fi

	if [ "$TST_MOUNT_DEVICE" = 1 ]; then
		tst_mount
		TST_MOUNT_FLAG=1
	fi
}

_tst_run_tcases_per_fs()
{
	local fs
	local filesystems

	filesystems="$(tst_supported_fs -s "$TST_SKIP_FILESYSTEMS")"
	if [ $? -ne 0 ]; then
		tst_brk TCONF "There are no supported filesystems or all skipped"
	fi

	for fs in $filesystems; do
		tst_res TINFO "=== Testing on $fs ==="
		TST_FS_TYPE="$fs"
		_tst_run_iterations
	done
}

tst_run()
{
	local _tst_i
	local _tst_data
	local _tst_max
	local _tst_name
	local _tst_pattern='[='\''"} \t\/:`$\;|].*'
	local ret

	if [ -n "$TST_TEST_PATH" ]; then
		for _tst_i in $(grep '^[^#]*\bTST_' "$TST_TEST_PATH" | sed "s/.*TST_//; s/$_tst_pattern//"); do
			case "$_tst_i" in
			ALL_FILESYSTEMS|DISABLE_APPARMOR|DISABLE_SELINUX);;
			SETUP|CLEANUP|TESTFUNC|ID|CNT|MIN_KVER);;
			OPTS|USAGE|PARSE_ARGS|POS_ARGS);;
			NEEDS_ROOT|NEEDS_TMPDIR|TMPDIR|NEEDS_DEVICE|DEVICE);;
			NEEDS_CMDS|NEEDS_MODULE|MODPATH|DATAROOT);;
			NEEDS_DRIVERS|FS_TYPE|MNTPOINT|MNT_PARAMS);;
			NEEDS_KCONFIGS|NEEDS_KCONFIGS_IFS);;
			IPV6|IPV6_FLAG|IPVER|TEST_DATA|TEST_DATA_IFS);;
			RETRY_FUNC|RETRY_FN_EXP_BACKOFF|TIMEOUT);;
			NET_DATAROOT|NET_MAX_PKT|NET_RHOST_RUN_DEBUG|NETLOAD_CLN_NUMBER);;
			NET_SKIP_VARIABLE_INIT|NEEDS_CHECKPOINTS);;
			CHECKPOINT_WAIT|CHECKPOINT_WAKE);;
			CHECKPOINT_WAKE2|CHECKPOINT_WAKE_AND_WAIT);;
			DEV_EXTRA_OPTS|DEV_FS_OPTS|FORMAT_DEVICE|MOUNT_DEVICE);;
			SKIP_FILESYSTEMS|SKIP_IN_LOCKDOWN|SKIP_IN_SECUREBOOT);;
			*) tst_res TWARN "Reserved variable TST_$_tst_i used!";;
			esac
		done

		for _tst_i in $(grep '^[^#]*\b_tst_' "$TST_TEST_PATH" | sed "s/.*_tst_//; s/$_tst_pattern//"); do
			tst_res TWARN "Private variable or function _tst_$_tst_i used!"
		done
	fi

	if ! tst_is_int "$TST_ITERATIONS"; then
		tst_brk TBROK "Expected number (-i) not '$TST_ITERATIONS'"
	fi

	if [ "$TST_ITERATIONS" -lt 0 ]; then
		tst_brk TBROK "Number of iterations (-i) must be >= 0"
	fi

	[ "$TST_NEEDS_ROOT" = 1 ] && tst_require_root

	if [ "$TST_SKIP_IN_SECUREBOOT" = 1 ] && tst_secureboot_enabled; then
		tst_brk TCONF "SecureBoot enabled, skipping test"
	fi

	if [ "$TST_SKIP_IN_LOCKDOWN" = 1 ] && tst_lockdown_enabled; then
		tst_brk TCONF "Kernel is locked down, skipping test"
	fi

	[ "$TST_DISABLE_APPARMOR" = 1 ] && tst_disable_apparmor
	[ "$TST_DISABLE_SELINUX" = 1 ] && tst_disable_selinux

	tst_require_cmds $TST_NEEDS_CMDS
	tst_require_kconfigs "$TST_NEEDS_KCONFIGS"
	tst_require_drivers $TST_NEEDS_DRIVERS

	if [ -n "$TST_MIN_KVER" ]; then
		tst_kvcmp -lt "$TST_MIN_KVER" && \
			tst_brk TCONF "test requires kernel $TST_MIN_KVER+"
	fi

	[ -n "$TST_NEEDS_MODULE" ] && tst_require_module "$TST_NEEDS_MODULE"

	[ "$TST_MOUNT_DEVICE" = 1 ] && TST_FORMAT_DEVICE=1
	[ "$TST_FORMAT_DEVICE" = 1 -o "$TST_ALL_FILESYSTEMS" = 1 ] && TST_NEEDS_DEVICE=1
	[ "$TST_NEEDS_DEVICE" = 1 ] && TST_NEEDS_TMPDIR=1

	if [ "$TST_NEEDS_TMPDIR" = 1 ]; then
		if [ -z "$TMPDIR" ]; then
			export TMPDIR="/tmp"
		fi

		TST_TMPDIR=$(mktemp -d "$TMPDIR/LTP_$TST_ID.XXXXXXXXXX")
		# remove possible trailing slash or double slashes from TMPDIR
		TST_TMPDIR=$(echo "$TST_TMPDIR" | sed 's~/\+~/~g')

		chmod 777 "$TST_TMPDIR"

		TST_STARTWD=$(pwd)
		cd "$TST_TMPDIR"
	fi

	# needs to be after cd $TST_TMPDIR to keep test_dev.img under $TST_TMPDIR
	if [ "$TST_NEEDS_DEVICE" = 1 ]; then
		TST_DEVICE=$(tst_device acquire)

		if [ ! -b "$TST_DEVICE" -o $? -ne 0 ]; then
			unset TST_DEVICE
			tst_brk TBROK "Failed to acquire device"
		fi
		TST_DEVICE_FLAG=1

		if [ -z "$TST_FS_TYPE" ]; then
			export TST_FS_TYPE="${LTP_DEV_FS_TYPE:-ext2}"
		fi
	fi

	if [ "$TST_ALL_FILESYSTEMS" != 1 -a "$TST_SKIP_FILESYSTEMS" ]; then
		if ! tst_supported_fs -s "$TST_SKIP_FILESYSTEMS" -d . > /dev/null; then
			tst_brk TCONF "filesystem is not supported by the test"
		fi

		tst_res TINFO "filesystem is supported by the test"
	fi

	[ -n "$TST_NEEDS_CHECKPOINTS" ] && _tst_init_checkpoints

	TST_MNTPOINT="${TST_MNTPOINT:-$PWD/mntpoint}"

	if [ "$TST_ALL_FILESYSTEMS" = 1 ]; then
		_tst_run_tcases_per_fs
	else
		_tst_run_iterations
	fi

	_tst_do_exit
}

_tst_run_iterations()
{
	local _tst_i=$TST_ITERATIONS
	local _tst_j

	[ "$TST_NEEDS_TMPDIR" = 1 ] && cd "$TST_TMPDIR"

	_prepare_device

	_tst_setup_timer

	if [ -n "$TST_SETUP" ]; then
		if command -v $TST_SETUP >/dev/null 2>/dev/null; then
			TST_DO_CLEANUP=1
			$TST_SETUP
		else
			tst_brk TBROK "TST_SETUP=$TST_SETUP declared, but function not defined (or cmd not found)"
		fi
	fi

	#TODO check that test reports some results for each test function call
	while [ $_tst_i -gt 0 ]; do
		if [ -n "$TST_TEST_DATA" ]; then
			tst_require_cmds cut tr wc
			_tst_max=$(( $(echo $TST_TEST_DATA | tr -cd "$TST_TEST_DATA_IFS" | wc -c) +1))
			for _tst_j in $(seq $_tst_max); do
				_tst_data="$(echo "$TST_TEST_DATA" | cut -d"$TST_TEST_DATA_IFS" -f$_tst_j)"
				_tst_run_tests "$_tst_data"
			done
		else
			_tst_run_tests
		fi
		_tst_i=$((_tst_i-1))
	done

	_tst_do_cleanup

	if [ "$TST_MOUNT_FLAG" = 1 ]; then
		cd "$LTPROOT"
		tst_umount
		TST_MOUNT_FLAG=
	fi
}

_tst_run_tests()
{
	local _tst_data="$1"
	local _tst_i

	TST_DO_CLEANUP=1
	for _tst_i in $(seq ${TST_CNT:-1}); do
		if command -v ${TST_TESTFUNC}1 > /dev/null 2>&1; then
			_tst_run_test "$TST_TESTFUNC$_tst_i" $_tst_i "$_tst_data"
		else
			_tst_run_test "$TST_TESTFUNC" $_tst_i "$_tst_data"
		fi
	done
}

_tst_run_test()
{
	local _tst_res=$(_tst_resstr)
	local _tst_fnc="$1"
	shift

	$_tst_fnc "$@"
	_tst_rescmp "$_tst_res"
	TST_COUNT=$((TST_COUNT+1))
}

export LC_ALL=C

if [ -z "$TST_ID" ]; then
	_tst_filename=$(basename $0) || \
		tst_brk TCONF "Failed to set TST_ID from \$0 ('$0'), fix it with setting TST_ID before sourcing tst_test.sh"
	TST_ID=${_tst_filename%%.*}
fi
export TST_ID="$TST_ID"

if [ -z "$LTPROOT" ]; then
	export LTPROOT="$PWD"
	export TST_DATAROOT="$LTPROOT/datafiles"
else
	export TST_DATAROOT="$LTPROOT/testcases/data/$TST_ID"
fi

if [ -z "$TST_NO_DEFAULT_RUN" ]; then
	if TST_TEST_PATH=$(command -v $0) 2>/dev/null; then
		if ! grep -q tst_run "$TST_TEST_PATH"; then
			tst_brk TBROK "Test $0 must call tst_run!"
		fi
	fi

	if [ -z "$TST_TESTFUNC" ]; then
		tst_brk TBROK "TST_TESTFUNC is not defined"
	fi

	TST_TEST_DATA_IFS="${TST_TEST_DATA_IFS:- }"

	TST_NEEDS_KCONFIGS_IFS="${TST_NEEDS_KCONFIGS_IFS:-,}"

	if [ -n "$TST_CNT" ]; then
		if ! tst_is_int "$TST_CNT"; then
			tst_brk TBROK "TST_CNT must be integer"
		fi

		if [ "$TST_CNT" -le 0 ]; then
			tst_brk TBROK "TST_CNT must be > 0"
		fi
	fi

	if [ -n "$TST_POS_ARGS" ]; then
		if ! tst_is_int "$TST_POS_ARGS"; then
			tst_brk TBROK "TST_POS_ARGS must be integer"
		fi

		if [ "$TST_POS_ARGS" -le 0 ]; then
			tst_brk TBROK "TST_POS_ARGS must be > 0"
		fi
	fi

	TST_ARGS="$@"

	tst_res TINFO "Running: $(basename $0) $TST_ARGS"

	OPTIND=1

	while getopts ":hi:$TST_OPTS" _tst_name $TST_ARGS; do
		case $_tst_name in
		'h') tst_usage; exit 0;;
		'i') TST_ITERATIONS=$OPTARG;;
		'?') tst_usage; exit 2;;
		*) $TST_PARSE_ARGS "$_tst_name" "$OPTARG";;
		esac
	done

	shift $((OPTIND - 1))

	if [ -n "$TST_POS_ARGS" ]; then
		if [ $# -ne "$TST_POS_ARGS" ]; then
			tst_brk TBROK "Invalid number of positional parameters:"\
					  "have ($@) $#, expected ${TST_POS_ARGS}"
		fi
	else
		if [ $# -ne 0 ]; then
			tst_brk TBROK "Unexpected positional arguments '$@'"
		fi
	fi
fi