check

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2002,2006 Silicon Graphics, Inc.  All Rights Reserved.
#
# Control script for QA
#
tmp="${TMPDIR:-/tmp}/$$"
status=0
needwrap=true
needsum=true
try=()
sum_bad=0
bad=()
notrun=()
interrupt=true
diff="diff -u"
showme=false
remain_args=()
randomize=false
exact_order=false
export here=`pwd`
xfile=""
subdir_xfile=""
brief_test_summary=false
do_report=false
DUMP_OUTPUT=false
iterations=1
istop=false
loop_on_fail=0
exclude_tests=()

# This is a global variable used to pass test failure text to reporting gunk
_err_msg=""

# start the initialisation work now
iam=check

# mkfs.xfs uses the presence of both of these variables to enable formerly
# supported tiny filesystem configurations that fstests use for fuzz testing
# in a controlled environment
export MSGVERB="text:action"
export QA_CHECK_FS=${QA_CHECK_FS:=true}

# number of diff lines from a failed test, 0 for whole output
export DIFF_LENGTH=${DIFF_LENGTH:=10}

# by default don't output timestamps
timestamp=${TIMESTAMP:=false}
. common/exit
. common/test_names

rm -f $tmp.list $tmp.tmp $tmp.grep $here/$iam.out $tmp.report.* $tmp.arglist

SRC_GROUPS="generic"
export SRC_DIR="tests"

usage()
{
	echo "Usage: $0 [options] [testlist]"'

General options:
    -b                      brief test summary
    -d                      dump test output to stdout
    -h, --help              show this help message
    -i <n>                  iterate the test list <n> times
    -I <n>                  iterate the test list <n> times, but stops
                              iterating further in case of any test failure
    -l                      line mode diff
    -L <n>                  loop tests <n> times following a failure, measuring
                              aggregate pass/fail metrics
    -n                      show me, do not run tests
    -r                      randomize test order
    -s section              run only specified section from config file
    -S section              exclude the specified section from the config file
    -T                      output timestamps
    -R fmt[,fmt]            generate report in formats specified. Supported
                              formats: xunit, xunit-quiet
    --exact-order           run tests in the exact order specified
    --extra-space <size>    require minimum free space on scratch device
    --fs <type>             test the given FSTYP; valid types include:
                              nfs, afs, glusterfs, cifs, 9p, fuse, virtiofs,
                              overlay, pvfs2, tmpfs, ubifs
    --large-fs              optimise scratch device for large filesystems
    --udiff                 show unified diff (default)

Test selection options:
    -e testlist             exclude a specific list of tests
    -E external_file        exclude tests listed in the given file
    -g group[,group...]     include tests from these groups
    -x group[,group...]     exclude tests from these groups
    -X exclude_file         exclude individual tests
    [testlist]              include tests matching names in testlist

Backward-compatible options:
    For compatibility, old options are still accepted (but deprecated):
    --fs <nfs|afs|glusterfs|...> is equivalent to:
        -nfs, -afs, -glusterfs, -cifs, -9p, -fuse, -virtiofs, -overlay,
        -pvfs2, -tmpfs, -ubifs
    -udiff is equivalent to --udiff.

testlist argument is a list of tests in the form of <test dir>/<test name>.

<test dir> is a directory under tests that contains a group file,
with a list of the names of the tests in that directory.

<test name> may be either a specific test file name (e.g. xfs/001) or
a test file name match pattern (e.g. xfs/*).

group argument is either a name of a tests group to collect from all
the test dirs (e.g. quick) or a name of a tests group to collect from
a specific tests dir in the form of <test dir>/<group name> (e.g. xfs/quick).
If you want to run all the tests in the test suite, use "-g all" to specify all
groups.

exclude_file argument refers to a name of a file inside each test directory.
For every test dir where this file is found, the listed test names are
excluded from the list of tests to run from that test dir.

external_file argument is a path to a single file containing a list of tests
to exclude in the form of <test dir>/<test name>.

examples:
 check xfs/001
 check --fs overlay -g quick
 check -g xfs/quick
 check -x stress xfs/*
 check -X .exclude -g auto
 check -E ~/.xfstests.exclude
'
	_fatal
}
get_sub_group_list()
{
	local d=$1
	local grp=$2

	test -s "$SRC_DIR/$d/group.list" || return 1

	local grpl=$(sed -n < $SRC_DIR/$d/group.list \
		-e 's/#.*//' \
		-e 's/$/ /' \
		-e "s;^\($VALID_TEST_NAME\).* $grp .*;$SRC_DIR/$d/\1;p")
	echo $grpl
}

get_group_list()
{
	local grp=$1
	local grpl=""
	local sub=$(dirname $grp)
	local fsgroup="$FSTYP"

	if [ -n "$sub" -a "$sub" != "." -a -d "$SRC_DIR/$sub" ]; then
		# group is given as <subdir>/<group> (e.g. xfs/quick)
		grp=$(basename $grp)
		get_sub_group_list $sub $grp
		return
	fi

	if [ "$FSTYP" = ext2 -o "$FSTYP" = ext3 ]; then
	    fsgroup=ext4
	fi
	for d in $SRC_GROUPS $fsgroup; do
		if ! test -d "$SRC_DIR/$d" ; then
			continue
		fi
		grpl="$grpl $(get_sub_group_list $d $grp)"
	done
	echo $grpl
}

# Find all tests, excluding files that are test metadata such as group files.
# It matches test names against $VALID_TEST_NAME defined in common/rc
get_all_tests()
{
	touch $tmp.list
	for d in $SRC_GROUPS $FSTYP; do
		if ! test -d "$SRC_DIR/$d" ; then
			continue
		fi
		ls $SRC_DIR/$d/* | \
			grep -v "\..*" | \
			grep "^$SRC_DIR/$d/$VALID_TEST_NAME"| \
			grep -v "group\|Makefile" >> $tmp.list 2>/dev/null
	done
}

# takes the list of tests to run in $tmp.list, and removes the tests passed to
# the function from that list.
trim_test_list()
{
	local test_list="$*"

	rm -f $tmp.grep
	local numsed=0
	for t in $test_list
	do
	    if [ $numsed -gt 100 ]; then
		grep -v -f $tmp.grep <$tmp.list >$tmp.tmp
		mv $tmp.tmp $tmp.list
		numsed=0
		rm -f $tmp.grep
	    fi
	    echo "^$t\$" >>$tmp.grep
	    numsed=`expr $numsed + 1`
	done
	grep -v -f $tmp.grep <$tmp.list >$tmp.tmp
	mv $tmp.tmp $tmp.list
	rm -f $tmp.grep
}

_timestamp()
{
    local now=`date "+%T"`
    echo -n " [$now]"
}

_prepare_test_list()
{
	unset list
	# Tests specified on the command line
	if [ -s $tmp.arglist ]; then
		cat $tmp.arglist > $tmp.list
	else
		touch $tmp.list
	fi

	# Specified groups to include
	# Note that the CLI processing adds a leading space to the first group
	# parameter, so we have to catch that here checking for "all"
	if [ ${#remain_args[@]} -eq 0 ] && [ "$GROUP_LIST" == " all" ]; then
		# no test numbers, do everything
		get_all_tests
	else
		for group in $GROUP_LIST; do
			list=$(get_group_list $group)
			if [ -z "$list" ]; then
				_fatal "Group \"$group\" is empty or not defined?"
			fi

			for t in $list; do
				grep -s "^$t\$" $tmp.list >/dev/null || \
							echo "$t" >>$tmp.list
			done
		done
	fi

	# Specified groups to exclude
	for xgroup in $XGROUP_LIST; do
		list=$(get_group_list $xgroup)
		if [ -z "$list" ]; then
			echo "Group \"$xgroup\" is empty or not defined?"
			continue
		fi

		trim_test_list $list
	done

	# sort the list of tests into numeric order unless we're running tests
	# in the exact order specified
	if ! $exact_order; then
		if $randomize; then
			if type shuf >& /dev/null; then
				sorter="shuf"
			else
				sorter="awk -v seed=$RANDOM -f randomize.awk"
			fi
		else
			sorter="cat"
		fi
		list=`sort -n $tmp.list | uniq | $sorter`
	else
		list=`cat $tmp.list`
	fi
	rm -f $tmp.list
}

deprecated_opt_warn()
{
	local old=$1
	shift

	echo "[WARN] $old is deprecated, replace it with $*"
}

# Backward compatible with the old options mode. Translate word-style options
# that getopt would misinterpret into long options.
compat_old_option()
{
	check_args=()
	while [ $# -gt 0 ]; do
		case "$1" in
		-nfs)
			check_args+=("--fs" "nfs")
			deprecated_opt_warn "-nfs" "--fs nfs"
			;;
		-afs)
			check_args+=("--fs" "afs")
			deprecated_opt_warn "-afs" "--fs afs"
			;;
		-glusterfs)
			check_args+=("--fs" "glusterfs")
			deprecated_opt_warn "-glusterfs" "--fs glusterfs"
			;;
		-cifs)
			check_args+=("--fs" "cifs")
			deprecated_opt_warn "-cifs" "--fs cifs"
			;;
		-9p)
			check_args+=("--fs" "9p")
			deprecated_opt_warn "-9p" "--fs 9p"
			;;
		-fuse)
			check_args+=("--fs" "fuse")
			deprecated_opt_warn "-fuse" "--fs fuse"
			;;
		-virtiofs)
			check_args+=("--fs" "virtiofs")
			deprecated_opt_warn "-virtiofs" "--fs virtiofs"
			;;
		-pvfs2)
			check_args+=("--fs" "pvfs2")
			deprecated_opt_warn "-pvfs2" "--fs pvfs2"
			;;
		-tmpfs)
			check_args+=("--fs" "tmpfs")
			deprecated_opt_warn "-tmpfs" "--fs tmpfs"
			;;
		-ubifs)
			check_args+=("--fs" "ubifs")
			deprecated_opt_warn "-ubifs" "--fs ubifs"
			;;
		-overlay)
			check_args+=("--fs" "overlay")
			deprecated_opt_warn "-overlay" "--fs overlay"
			;;
		-udiff)
			check_args+=("--udiff")
			deprecated_opt_warn "-udiff" "--udiff"
			;;
		-\?)
			check_args+=("--help")
			deprecated_opt_warn "-\?" "-h or --help"
			;;
		*)
			check_args+=("$1")
			;;
		esac
		shift
	done
}

# Process tests from command line now.
process_remain_tests()
{
	local list test_dir test_name group_file

	while [ $# -gt 0 ]; do
		case "$1" in
		-*)
			_fatal "Arguments before tests, please!"
			;;
		*)
			# Expand test pattern (e.g. xfs/???, *fs/001)
			list=$(cd $SRC_DIR; echo $1)
			for t in $list; do
				t=${t#$SRC_DIR/}
				test_dir=${t%%/*}
				test_name=${t##*/}
				group_file=$SRC_DIR/$test_dir/group.list

				if grep -Eq "^$test_name" $group_file; then
					# in group file ... OK
					echo $SRC_DIR/$test_dir/$test_name \
						>>$tmp.arglist
				else
					# oops
					echo "$t - unknown test, ignored"
				fi
			done
			;;
		esac

		shift
	done
}

parse_check_args()
{
	local short_opts="g:x:X:e:E:s:S:lnri:I:TdbR:L:h"
	local long_opts="fs:,exact-order,large-fs,extra-space:,udiff,help"

	compat_old_option "$@"

	# Note: The '+' prefix in getopt's option string preserves the existing
	# behavior that option parsing stops at the first non-option test argument.
	local parsed_opts
	parsed_opts=$(getopt -n "check" -o +"${short_opts}" -l "$long_opts" -- "${check_args[@]}")
	test $? -ne 0 && usage

	eval set -- "$parsed_opts"

	while [ $# -gt 0 ]; do
		case "$1" in
		--fs)
			if [ "$2" == "overlay" ];then
				[ "$FSTYP" == overlay ] || \
					export OVL_BASE_FSTYP="$FSTYP"
				FSTYP=overlay
				export OVERLAY=true
			else
				FSTYP="$2"
			fi
			shift
			;;
		--udiff)
			diff="$diff -u"
			;;
		-g)
			GROUP_LIST="$GROUP_LIST ${2//,/ }"
			shift
			;;
		-x)
			XGROUP_LIST="$XGROUP_LIST ${2//,/ }"
			shift
			;;
		-X)
			subdir_xfile="$2"
			shift
			;;
		-e)
			readarray -t -O "${#exclude_tests[@]}" exclude_tests < \
				<(echo "$2" | tr ', ' '\n\n')
			shift
			;;
		-E)
			if [ -f "$2" ]; then
				readarray -t -O ${#exclude_tests[@]} exclude_tests < \
					<(sed "s/#.*$//" "$2")
			fi
			shift
			;;
		-s)
			RUN_SECTION="$RUN_SECTION $2"
			shift
			;;
		-S)
			EXCLUDE_SECTION="$EXCLUDE_SECTION $2"
			shift
			;;
		-l)
			diff="diff"
			;;
		-n)
			showme=true
			;;
		-r)
			if $exact_order; then
				_fatal "Cannot specify -r and --exact-order."
			fi
			randomize=true
			;;
		--exact-order)
			if $randomize; then
				_fatal "Cannot specify --exact-order and -r."
			fi
			exact_order=true
			;;
		-i)
			iterations=$2
			shift
			;;
		-I)
			iterations=$2
			istop=true
			shift
			;;
		-T)
			timestamp=true
			;;
		-d)
			DUMP_OUTPUT=true
			;;
		-b)
			brief_test_summary=true
			;;
		-R)
			REPORT_LIST="$REPORT_LIST ${2//,/ }"
			do_report=true
			shift
			;;
		--large-fs)
			export LARGE_SCRATCH_DEV=yes
			;;
		--extra-space)
			export SCRATCH_DEV_EMPTY_SPACE="$2"
			shift
			;;
		-L)
			[[ $2 =~ ^[0-9]+$ ]] || usage
			loop_on_fail=$2
			shift
			;;
		-h|--help)
			usage
			;;
		--)
			shift
			break
			;;
		*)
			usage
			;;
		esac
		shift
	done

	# Remaining arguments (tests list)
	if [ $# -gt 0 ]; then
		remain_args=("$@")
		process_remain_tests "${remain_args[@]}"
	elif [ -z "$GROUP_LIST" ]; then
		# default group list is the auto group. If any other group or
		# test is specified, we use that instead.
		GROUP_LIST="auto"
	fi
}

parse_check_args "$@"

# we need common/rc, that also sources common/config. We need to source it
# after processing args, overlay needs FSTYP set before sourcing common/config
if ! . ./common/rc; then
	_fatal "check: failed to source common/rc"
fi

init_rc

# If the test config specified a soak test duration, see if there are any
# unit suffixes that need converting to an integer seconds count.
if [ -n "$SOAK_DURATION" ]; then
	SOAK_DURATION="$(echo "$SOAK_DURATION" | \
		sed -e 's/^\([.0-9]*\)\([a-z]\)*/\1 \2/g' | \
		$AWK_PROG -f $here/src/soak_duration.awk)"
	if [ $? -ne 0 ]; then
		_fatal
	fi
fi

# If the test config specified a fuzz rewrite test duration, see if there are
# any unit suffixes that need converting to an integer seconds count.
if [ -n "$FUZZ_REWRITE_DURATION" ]; then
	FUZZ_REWRITE_DURATION="$(echo "$FUZZ_REWRITE_DURATION" | \
		sed -e 's/^\([.0-9]*\)\([a-z]\)*/\1 \2/g' | \
		$AWK_PROG -f $here/src/soak_duration.awk)"
	if [ $? -ne 0 ]; then
		_fatal
	fi
fi

if [ -n "$subdir_xfile" ]; then
	for d in $SRC_GROUPS $FSTYP; do
		[ -f $SRC_DIR/$d/$subdir_xfile ] || continue
		for f in `sed "s/#.*$//" $SRC_DIR/$d/$subdir_xfile`; do
			exclude_tests+=($d/$f)
		done
	done
fi

if [ `id -u` -ne 0 ]
then
    _fatal "check: QA must be run as root"
fi

_wipe_counters()
{
	try=()
	notrun=()
	bad=()
}

_global_log() {
	echo "$1" >> $check.log
	if $OPTIONS_HAVE_SECTIONS; then
		echo "$1" >> ${REPORT_DIR}/check.log
	fi
}

if [ -n "$REPORT_GCOV" ]; then
	. ./common/gcov
	_gcov_check_report_gcov
fi

_wrapup()
{
	seq="check.$$"
	check="$RESULT_BASE/check"
	$interrupt && sect_stop=`_wallclock`

	if $showme && $needwrap; then
		if $do_report; then
			# $showme = all selected tests are notrun (no tries)
			_make_section_report "$section" "${#notrun[*]}" "0" \
					     "${#notrun[*]}" \
					     "$((sect_stop - sect_start))"
		fi
		needwrap=false
	elif $needwrap; then
		if [ -f $check.time -a -f $tmp.time ]; then
			cat $check.time $tmp.time  \
				| $AWK_PROG '
				{ t[$1] = $2 }
				END {
					if (NR > 0) {
						for (i in t) print i " " t[i]
					}
				}' \
				| sort -n >$tmp.out
			mv $tmp.out $check.time
			if $OPTIONS_HAVE_SECTIONS; then
				cp $check.time ${REPORT_DIR}/check.time
			fi
		fi

		_global_log ""
		_global_log "Kernel version: $(uname -r)"
		_global_log "$(date)"

		echo "SECTION       -- $section" >>$tmp.summary
		echo "=========================" >>$tmp.summary
		if ((${#try[*]} > 0)); then
			if [ $brief_test_summary == "false" ]; then
				echo "Ran: ${try[*]}"
				echo "Ran: ${try[*]}" >>$tmp.summary
			fi
			_global_log "Ran: ${try[*]}"
		fi

		$interrupt && echo "Interrupted!" | tee -a $check.log
		if $OPTIONS_HAVE_SECTIONS; then
			$interrupt && echo "Interrupted!" | tee -a \
				${REPORT_DIR}/check.log
		fi

		if ((${#notrun[*]} > 0)); then
			if [ $brief_test_summary == "false" ]; then
				echo "Not run: ${notrun[*]}"
				echo "Not run: ${notrun[*]}" >>$tmp.summary
			fi
			_global_log "Not run: ${notrun[*]}"
		fi

		if ((${#bad[*]} > 0)); then
			echo "Failures: ${bad[*]}"
			echo "Failed ${#bad[*]} of ${#try[*]} tests"
			_global_log "Failures: ${bad[*]}"
			_global_log "Failed ${#bad[*]} of ${#try[*]} tests"
			echo "Failures: ${bad[*]}" >>$tmp.summary
			echo "Failed ${#bad[*]} of ${#try[*]} tests" >>$tmp.summary
		else
			echo "Passed all ${#try[*]} tests"
			_global_log "Passed all ${#try[*]} tests"
			echo "Passed all ${#try[*]} tests" >>$tmp.summary
		fi
		echo "" >>$tmp.summary
		if $do_report; then
			_make_section_report "$section" "${#try[*]}" \
					     "${#bad[*]}" "${#notrun[*]}" \
					     "$((sect_stop - sect_start))"
		fi

		# Generate code coverage report
		if [ -n "$REPORT_GCOV" ]; then
			# don't trigger multiple times if caller hits ^C
			local gcov_report_dir="$REPORT_GCOV"
			test "$gcov_report_dir" = "1" && \
				gcov_report_dir="$REPORT_DIR/gcov"
			unset REPORT_GCOV

			_gcov_generate_report "$gcov_report_dir"
		fi

		needwrap=false
	fi

	sum_bad=`expr $sum_bad + ${#bad[*]}`
	_wipe_counters
	if ! $OPTIONS_HAVE_SECTIONS; then
		rm -f $tmp.*
	fi
}

_summary()
{
	_wrapup
	if $showme; then
		:
	elif $needsum; then
		count=`wc -L $tmp.summary | cut -f1 -d" "`
		cat $tmp.summary
		needsum=false
	fi
	rm -f $tmp.*
}

_check_filesystems()
{
	local ret=0

	if [ -f ${RESULT_DIR}/require_test ]; then
		if ! _check_test_fs ; then
			ret=1
			echo "Trying to repair broken TEST_DEV file system"
			_repair_test_fs
			_test_mount
		fi
		rm -f ${RESULT_DIR}/require_test*
	else
		_test_unmount 2> /dev/null
	fi
	if [ -f ${RESULT_DIR}/require_scratch ]; then
		_check_scratch_fs || ret=1
		rm -f ${RESULT_DIR}/require_scratch*
	fi
	_scratch_unmount 2> /dev/null
	return $ret
}

_expunge_test()
{
	local TEST_ID="$1"

	for f in "${exclude_tests[@]}"; do
		# $f may contain traling spaces and comments
		local id_regex="^${TEST_ID}\b"
		if [[ "$f" =~ ${id_regex} ]]; then
			echo "       [expunged]"
			return 0
		fi
	done
	return 1
}

# retain files which would be overwritten in subsequent reruns of the same test
_stash_fail_loop_files() {
	local seq_prefix="${REPORT_DIR}/${1}"
	local cp_suffix="$2"

	for i in ".full" ".dmesg" ".out.bad" ".notrun" ".core" ".hints" ".mountfail"; do
		rm -f "${seq_prefix}${i}${cp_suffix}"
		if [ -f "${seq_prefix}${i}" ]; then
			cp "${seq_prefix}${i}" "${seq_prefix}${i}${cp_suffix}"
		fi
	done
}

# Retain in @bad / @notrun the result of the just-run @test_seq. @try array
# entries are added prior to execution.
_stash_test_status() {
	local test_seq="$1"
	local test_status="$2"

	if $do_report && [[ $test_status != "expunge" ]]; then
		_make_testcase_report "$section" "$test_seq" \
				      "$test_status" "$((stop - start))"
	fi

	if ((${#loop_status[*]} > 0)); then
		# continuing or completing rerun-on-failure loop
		_stash_fail_loop_files "$test_seq" ".rerun${#loop_status[*]}"
		loop_status+=("$test_status")
		if ((${#loop_status[*]} > loop_on_fail)); then
			printf "%s aggregate results across %d runs: " \
				"$test_seq" "${#loop_status[*]}"
			awk "BEGIN {
				n=split(\"${loop_status[*]}\", arr);"'
				for (i = 1; i <= n; i++)
					stats[arr[i]]++;
				for (x in stats)
					printf("%s=%d (%.1f%%)",
					       (i-- > n ? x : ", " x),
					       stats[x], 100 * stats[x] / n);
				}'
			echo
			loop_status=()
		fi
		return	# only stash @bad result for initial failure in loop
	fi

	case "$test_status" in
	fail)
		if ((loop_on_fail > 0)); then
			# initial failure, start rerun-on-failure loop
			_stash_fail_loop_files "$test_seq" ".rerun0"
			loop_status+=("$test_status")
		fi
		bad+=("$test_seq")
		;;
	list|notrun)
		notrun+=("$test_seq")
		;;
	pass|expunge)
		;;
	*)
		echo "Unexpected test $test_seq status: $test_status"
		;;
	esac
}

# Figure out the maximum test name length, e.g. "generic/1212" => 12
max_test_namelen=$(ls "$SRC_DIR"/*/* | \
	awk 'BEGIN {x = 0} /\/[0-9]*$/ {l = length($0) - 6; if (l > x) x = l;} END {print x}')

# Can we run systemd scopes?
HAVE_SYSTEMD_SCOPES=
systemctl reset-failed "fstests-check" &>/dev/null
systemd-run --quiet --unit "fstests-check" --scope bash -c "exit 77" &> /dev/null
test $? -eq 77 && HAVE_SYSTEMD_SCOPES=yes

# Make the check script unattractive to the OOM killer...
OOM_SCORE_ADJ="/proc/self/oom_score_adj"
function _adjust_oom_score() {
	test -w "${OOM_SCORE_ADJ}" && echo "$1" > "${OOM_SCORE_ADJ}"
}
_adjust_oom_score -500

# ...and make the tests themselves somewhat more attractive to it, so that if
# the system runs out of memory it'll be the test that gets killed and not the
# test framework.  The test is run in a separate process without any of our
# functions, so we open-code adjusting the OOM score.
#
# If systemd is available, run the entire test script in a scope so that we can
# kill all subprocesses of the test if it fails to clean up after itself.  This
# is essential for ensuring that the post-test unmount succeeds.  Note that
# systemd doesn't automatically remove transient scopes that fail to terminate
# when systemd tells them to terminate (e.g. programs stuck in D state when
# systemd sends SIGKILL), so we use reset-failed to tear down the scope.
_run_seq() {
	local cmd=(bash -c "test -w ${OOM_SCORE_ADJ} && echo 250 > ${OOM_SCORE_ADJ}; exec ./$seq")
	local res

	if [ -n "${HAVE_SYSTEMD_SCOPES}" ]; then
		local unit="$(systemd-escape "fs$seq").scope"
		systemctl reset-failed "${unit}" &> /dev/null
		systemd-run --quiet --unit "${unit}" --scope "${cmd[@]}"
		res=$?
		systemctl stop "${unit}" &> /dev/null
		return "${res}"
	else
		"${cmd[@]}"
	fi
}

_detect_kmemleak
_prepare_test_list
fstests_start_time="$(date +"%F %T")"

# We are not using _exit in the trap handler so that it is obvious to the reader
# that we are using the last set value of "status" before we finally exit
# from the check script.
if $OPTIONS_HAVE_SECTIONS; then
	trap "_summary; exit \$status" 0 1 2 3 15
else
	trap "_wrapup; exit \$status" 0 1 2 3 15
fi

function run_section()
{
	local section=$1 skip

	OLD_FSTYP=$FSTYP
	OLD_TEST_FS_MOUNT_OPTS=$TEST_FS_MOUNT_OPTS

	# Do we need to run only some sections ?
	if [ ! -z "$RUN_SECTION" ]; then
		skip=true
		for s in $RUN_SECTION; do
			if [ $section == $s ]; then
				skip=false
				break;
			fi
		done
		if $skip; then
			return
		fi
	fi

	# Did this section get excluded?
	if [ ! -z "$EXCLUDE_SECTION" ]; then
		skip=false
		for s in $EXCLUDE_SECTION; do
			if [ $section == $s ]; then
				skip=true
				break;
			fi
		done
		if $skip; then
			return
		fi
	fi

	get_next_config $section
	_canonicalize_devices

	mkdir -p $RESULT_BASE
	if [ ! -d $RESULT_BASE ]; then
		_fatal "failed to create results directory $RESULT_BASE"
	fi

	if $OPTIONS_HAVE_SECTIONS; then
		echo "SECTION       -- $section"
	fi

	sect_start=`_wallclock`
	if $RECREATE_TEST_DEV || [ "$OLD_FSTYP" != "$FSTYP" ]; then
		echo "RECREATING    -- $FSTYP on $TEST_DEV"
		_test_unmount 2> /dev/null
		if ! _test_mkfs >$tmp.err 2>&1
		then
			echo "our local _test_mkfs routine ..."
			cat $tmp.err
			_fatal "check: failed to mkfs \$TEST_DEV using specified options"
		fi
		# Previous FSTYP derived from TEST_DEV could be changed, source
		# common/rc again with correct FSTYP to get FSTYP specific configs,
		# e.g. common/xfs
		. common/rc
		_prepare_test_list
	elif [ "$OLD_TEST_FS_MOUNT_OPTS" != "$TEST_FS_MOUNT_OPTS" ]; then
		# Unmount TEST_DEV to apply the updated mount options.
		# It will be mounted again by init_rc(), called shortly after.
		_test_unmount 2> /dev/null
	fi

	init_rc

	seq="check.$$"
	check="$RESULT_BASE/check"
	seqres="$check"

	# don't leave old full output behind on a clean run
	rm -f $check.full

	[ -f $check.time ] || touch $check.time

	# print out our test configuration
	echo "FSTYP         -- `_full_fstyp_details`"
	echo "PLATFORM      -- `_full_platform_details`"
	if [ ! -z "$SCRATCH_DEV" ]; then
	  echo "MKFS_OPTIONS  -- `_scratch_mkfs_options`"
	  echo "MOUNT_OPTIONS -- `_scratch_mount_options`"
	fi
	echo
	test -n "$REPORT_GCOV" && _gcov_reset
	needwrap=true

	if [ ! -z "$SCRATCH_DEV" ]; then
	  _scratch_unmount 2> /dev/null
	  # call the overridden mkfs - make sure the FS is built
	  # the same as we'll create it later.

	  if ! _scratch_mkfs >$tmp.err 2>&1
	  then
	      echo "our local _scratch_mkfs routine ..."
	      cat $tmp.err
	      _fatal "check: failed to mkfs \$SCRATCH_DEV using specified options"
	  fi

	  # call the overridden mount - make sure the FS mounts with
	  # the same options that we'll mount with later.
	  if ! _try_scratch_mount >$tmp.err 2>&1
	  then
	      echo "our local mount routine ..."
	      cat $tmp.err
	      _fatal "check: failed to mount \$SCRATCH_DEV using specified options"
	  else
	      _scratch_unmount
	  fi
	fi

	_check_test_fs

	loop_status=()	# track rerun-on-failure state
	local tc_status ix
	local -a _list=( $list )
	for ((ix = 0; ix < ${#_list[*]}; !${#loop_status[*]} && ix++)); do
		seq="${_list[$ix]}"

		if [ ! -f $seq ]; then
			# Try to get full name in case the user supplied only
			# seq id and the test has a name. A bit of hassle to
			# find really the test and not its sample output or
			# helping files.
			bname=$(basename $seq)
			full_seq=$(find $(dirname $seq) -name $bname* -executable |
				awk '(NR == 1 || length < length(shortest)) { shortest = $0 }\
				     END { print shortest }')
			if [ -f $full_seq ] && \
			   [ x$(echo $bname | grep -o "^$VALID_TEST_ID") != x ]; then
				seq=$full_seq
			fi
		fi

		# the filename for the test and the name output are different.
		# we don't include the tests/ directory in the name output.
		export seqnum=${seq#$SRC_DIR/}
		group=${seqnum%%/*}
		if $OPTIONS_HAVE_SECTIONS; then
			REPORT_DIR="$RESULT_BASE/$section"
		else
			REPORT_DIR="$RESULT_BASE"
		fi
		export RESULT_DIR="$REPORT_DIR/$group"
		seqres="$REPORT_DIR/$seqnum"

		# Generate the entire section report with whatever test results
		# we have so far.  Leave the $sect_time parameter empty so that
		# it's a little more obvious that this test run is incomplete.
		if $do_report; then
			_make_section_report "$section" "${#try[*]}" \
					     "${#bad[*]}" "${#notrun[*]}" \
					     "" &> /dev/null
		fi

		# Print test name and leave the cursor at a consistent column
		# number for later reporting of test outcome.
		printf "%-*s" "$max_test_namelen" "$seqnum"

		if $showme; then
			if _expunge_test $seqnum; then
				tc_status="expunge"
			else
				echo
				start=0
				stop=0
				tc_status="list"
			fi
			_stash_test_status "$seqnum" "$tc_status"
			continue
		fi

		tc_status="pass"
		if [ ! -f $seq ]; then
			echo " - no such test?"
			_stash_test_status "$seqnum" "$tc_status"
			continue
		fi

		# really going to try and run this one
		mkdir -p $RESULT_DIR
		rm -f ${RESULT_DIR}/require_scratch*
		rm -f ${RESULT_DIR}/require_test*
		rm -f $seqres.out.bad $seqres.hints $seqres.out.good

		# check if we really should run it
		if _expunge_test $seqnum; then
			tc_status="expunge"
			_stash_test_status "$seqnum" "$tc_status"
			continue
		fi

		# record that we really tried to run this test.
		if ((!${#loop_status[*]})); then
			try+=("$seqnum")
		fi

		awk 'BEGIN {lasttime="       "} \
		     $1 == "'$seqnum'" {lasttime=" " $2 "s ... "; exit} \
		     END {printf "%s", lasttime}' "$check.time"
		rm -f core $seqres.notrun
		_start_coredumpctl_collection

		start=`_wallclock`
		$timestamp && _timestamp
		[ ! -x $seq ] && chmod u+x $seq # ensure we can run it
		$LOGGER_PROG "run xfstest $seqnum"
		if [ -w /dev/kmsg ]; then
			export date_time=`date +"%F %T"`
			echo "run fstests $seqnum at $date_time" > /dev/kmsg
			# _check_dmesg depends on this log in dmesg
			touch ${RESULT_DIR}/check_dmesg
			rm -f ${RESULT_DIR}/dmesg_filter
		fi
		_try_wipe_scratch_devs > /dev/null 2>&1

		# clear the WARN_ONCE state to allow a potential problem
		# to be reported for each test
		(echo 1 > $DEBUGFS_MNT/clear_warn_once) > /dev/null 2>&1

		test_start_time="$(date +"%F %T")"
		if [ "$DUMP_OUTPUT" = true ]; then
			_run_seq 2>&1 | tee $tmp.out
			# Because $? would get tee's return code
			sts=${PIPESTATUS[0]}
		else
			_run_seq >$tmp.out 2>&1
			sts=$?
		fi

		# If someone sets kernel.core_pattern or kernel.core_uses_pid,
		# coredumps generated by fstests might have a longer name than
		# just "core".  Use globbing to find the most common patterns,
		# assuming there are no other coredump capture packages set up.
		local cores=0
		_finish_coredumpctl_collection
		for i in core core.*; do
			test -f "$i" || continue
			if ((cores++ == 0)); then
				_dump_err_cont "[dumped core]"
			fi
			(_adjust_oom_score 250; _save_coredump "$i")
			tc_status="fail"
		done

		if [ -f $seqres.notrun ]; then
			$timestamp && _timestamp
			stop=`_wallclock`
			$timestamp || echo -n "[not run] "
			$timestamp && echo " [not run]" && \
				      echo -n "	$seqnum -- "
			cat $seqres.notrun
			tc_status="notrun"
			rm -f "$seqres.mountfail?"
			_stash_test_status "$seqnum" "$tc_status"

			# Unmount the scratch fs so that we can wipe the scratch
			# dev state prior to the next test run.
			_scratch_unmount 2> /dev/null
			continue;
		fi

		if [ $sts -ne 0 ]; then
			_dump_err_cont "[failed, exit status $sts]"
			_test_unmount 2> /dev/null
			_scratch_unmount 2> /dev/null
			rm -f ${RESULT_DIR}/require_scratch*

			# Make sure the test filesystem is ready to go since
			# we don't call _check_filesystems for failed tests
			(_adjust_oom_score 250; _check_filesystems) || tc_status="fail"

			rm -f ${RESULT_DIR}/require_test*
			# Even though we failed, there may be something interesting in
			# dmesg which can help debugging.
			_check_dmesg
			tc_status="fail"
		else
			# The test apparently passed, so check for corruption
			# and log messages that shouldn't be there.  Run the
			# checking tools from a subshell with adjusted OOM
			# score so that the OOM killer will target them instead
			# of the check script itself.
			(_adjust_oom_score 250; _check_filesystems) || tc_status="fail"
			_check_dmesg || tc_status="fail"

			# Save any coredumps from the post-test fs checks
			for i in core core.*; do
				test -f "$i" || continue
				if ((cores++ == 0)); then
					_dump_err_cont "[dumped core]"
				fi
				(_adjust_oom_score 250; _save_coredump "$i")
				tc_status="fail"
			done
		fi

		# Reload the module after each test to check for leaks or
		# other problems.
		if [ -n "${TEST_FS_MODULE_RELOAD}" ]; then
			_test_unmount 2> /dev/null
			_scratch_unmount 2> /dev/null
			modprobe -r fs-$FSTYP
			modprobe fs-$FSTYP
		fi

		# Scan for memory leaks after every test so that associating
		# a leak to a particular test will be as accurate as possible.
		_check_kmemleak || tc_status="fail"

		# test ends after all checks are done.
		$timestamp && _timestamp
		stop=`_wallclock`

		local out=$here/$seq.out
		if [ -f $seqres.out.good ]; then
			out=$seqres.out.good
		fi
		if [ ! -f $out ]; then
			_dump_err "no qualified output"
			tc_status="fail"
			rm -f "$seqres.mountfail?"
			_stash_test_status "$seqnum" "$tc_status"
			continue;
		fi

		# coreutils 8.16+ changed quote formats in error messages
		# from `foo' to 'foo'. Filter old versions to match the new
		# version.
		sed -i "s/\`/\'/g" $tmp.out
		if diff $out $tmp.out >/dev/null 2>&1 ; then
			if [ "$tc_status" != "fail" ]; then
				echo "$seqnum `expr $stop - $start`" >>$tmp.time
				echo -n " `expr $stop - $start`s"
			fi
			echo ""
		else
			_dump_err "- output mismatch (see $seqres.out.bad)"
			mv $tmp.out $seqres.out.bad
			$diff $out $seqres.out.bad | {
			if test "$DIFF_LENGTH" -le 0; then
				cat
			else
				head -n "$DIFF_LENGTH"
				echo "..."
				echo "(Run '$diff $out $seqres.out.bad'" \
					" to see the entire diff)"
			fi; } | sed -e 's/^\(.\)/    \1/'
			tc_status="fail"
		fi
		if [ -f $seqres.hints ]; then
			if [ "$tc_status" == "fail" ]; then
				echo
				cat $seqres.hints
			else
				rm -f $seqres.hints
			fi
		fi

		if [ -f "$seqres.mountfail?" ]; then
			if [ "$tc_status" = "fail" ]; then
				# Let the user know if there were mount
				# failures on a test that failed because that
				# could be interesting.
				mv "$seqres.mountfail?" "$seqres.mountfail"
				_dump_err "check: possible mount failures (see $seqres.mountfail)"
			else
				# Don't retain mount failure logs for tests
				# that pass or were skipped because some tests
				# intentionally drive mount failures.
				rm -f "$seqres.mountfail?"
			fi
		fi

		_stash_test_status "$seqnum" "$tc_status"
	done

	# Reset these three variables so that unmount output doesn't get
	# written to $seqres.full of the last test to run.
	seq="check.$$"
	check="$RESULT_BASE/check"
	seqres="$check"

	sect_stop=`_wallclock`
	interrupt=false
	_wrapup
	interrupt=true
	echo

	_test_unmount 2> /dev/null
	_scratch_unmount 2> /dev/null
}

for ((iters = 0; iters < $iterations; iters++)) do
	for section in $HOST_OPTIONS_SECTIONS; do
		run_section $section
		if [ "$sum_bad" != 0 ] && [ "$istop" = true ]; then
			interrupt=false
			_exit `expr $sum_bad != 0`
		fi
	done
done

interrupt=false
_exit `expr $sum_bad != 0`