common/fuzzy - pub/scm/linux/kernel/git/dgc/xfstests-dev - Git at Google

 ##/bin/bash

 # Routines for fuzzing and scrubbing a filesystem.
 #
 #-----------------------------------------------------------------------
 #  Copyright (c) 2017 Oracle.  All Rights Reserved.
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
 #  the Free Software Foundation; either version 2 of the License, or
 #  (at your option) any later version.
 #
 #  This program is distributed in the hope that it will be useful,
 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #  GNU General Public License for more details.
 #
 #  You should have received a copy of the GNU General Public License
 #  along with this program; if not, write to the Free Software
 #  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 #  USA
 #-----------------------------------------------------------------------

 # Modify various files after a fuzzing operation
 _scratch_fuzz_modify() {
 	nr="$1"

 	test -z "${nr}" && nr=50000
 	echo "+++ touch ${nr} files"
 	blk_sz=$(stat -f -c '%s' ${SCRATCH_MNT})
 	$XFS_IO_PROG -f -c "pwrite -S 0x63 0 ${blk_sz}" "/tmp/afile" > /dev/null
 	date="$(date)"
 	find "${SCRATCH_MNT}/" -type f 2> /dev/null | head -n "${nr}" | while read f; do
 		setfattr -n "user.date" -v "${date}" "$f"
 		cat "/tmp/afile" >> "$f"
 		mv "$f" "$f.longer"
 	done
 	sync
 	rm -rf "/tmp/afile"

 	echo "+++ create files"
 	mkdir -p "${SCRATCH_MNT}/test.moo"
 	$XFS_IO_PROG -f -c 'pwrite -S 0x80 0 65536' "${SCRATCH_MNT}/test.moo/urk" > /dev/null
 	sync

 	echo "+++ remove files"
 	rm -rf "${SCRATCH_MNT}/test.moo"
 }

 # Try to access files after fuzzing
 _scratch_fuzz_test() {
 	echo "+++ ls -laR" >> $seqres.full
 	ls -laR "${SCRATCH_MNT}/test.1/" >/dev/null 2>&1

 	echo "+++ cat files" >> $seqres.full
 	(find "${SCRATCH_MNT}/test.1/" -type f -size -1048576k -print0 | xargs -0 cat) >/dev/null 2>&1
 }

 # Do we have an online scrub program?
 _require_scrub() {
 	case "${FSTYP}" in
 	"xfs")
 		test -x "$XFS_SCRUB_PROG" || _notrun "xfs_scrub not found"
 		;;
 	*)
 		_notrun "No online scrub program for ${FSTYP}."
 		;;
 	esac
 }

 # Scrub the scratch filesystem metadata (online)
 _scratch_scrub() {
 	case "${FSTYP}" in
 	"xfs")
 		$XFS_SCRUB_PROG -d -T -v "$@" $SCRATCH_MNT
 		;;
 	*)
 		_fail "No online scrub program for ${FSTYP}."
 		;;
 	esac
 }

 # Filter out any keys with an array index >= 10, collapse any array range
 # ("[1-195]") to the first item, and ignore padding fields.
 __filter_xfs_db_keys() {
 	sed -e '/\([a-z]*\)\[\([0-9][0-9]\+\)\].*/d' \
 	    -e 's/\([a-zA-Z0-9_]*\)\[\([0-9]*\)-[0-9]*\]/\1[\2]/g' \
 	    -e '/pad/d'
 }

 # Filter the xfs_db print command's field debug information
 # into field name and type.
 __filter_xfs_db_print_fields() {
 	filter="$1"
 	if [ -z "${filter}" ] || [ "${filter}" = "nofilter" ]; then
 		filter='^'
 	fi
 	grep ' = ' | while read key equals value; do
 		fuzzkey="$(echo "${key}" | __filter_xfs_db_keys)"
 		if [ -z "${fuzzkey}" ]; then
 			continue
 		elif [[ "${value}" == "["* ]]; then
 			echo "${value}" | sed -e 's/^.//g' -e 's/.$//g' -e 's/,/\n/g' | while read subfield; do
 				echo "${fuzzkey}.${subfield}"
 			done | __filter_xfs_db_keys
 		else
 			echo "${fuzzkey}"
 		fi
 	done | egrep "${filter}"
 }

 # Navigate to some part of the filesystem and print the field info.
 # The first argument is an egrep filter for the fields
 # The rest of the arguments are xfs_db commands to locate the metadata.
 _scratch_xfs_list_metadata_fields() {
 	filter="$1"
 	shift
 	if [ -n "${SCRATCH_XFS_LIST_METADATA_FIELDS}" ]; then
 		echo "${SCRATCH_XFS_LIST_METADATA_FIELDS}" | tr '[ ,]' '[\n\n]'
 		return;
 	fi

 	local cmds=()
 	for arg in "$@"; do
 		cmds+=("-c" "${arg}")
 	done
 	_scratch_xfs_db "${cmds[@]}" -c print | __filter_xfs_db_print_fields "${filter}"
 }

 # Fuzz a metadata field
 # The first arg is the field name
 # The second arg is the xfs_db fuzz verb
 # The rest of the arguments are xfs_db commands to find the metadata.
 _scratch_xfs_fuzz_metadata_field() {
 	key="$1"
 	value="$2"
 	shift; shift

 	if [[ "${key}" == *crc ]]; then
 		fuzz_arg="-c"
 	else
 		fuzz_arg="-d"
 	fi
 	oldval="$(_scratch_xfs_get_metadata_field "${key}" "$@")"

 	local cmds=()
 	for arg in "$@"; do
 		cmds+=("-c" "${arg}")
 	done
 	while true; do
 		_scratch_xfs_db -x "${cmds[@]}" -c "fuzz ${fuzz_arg} ${key} ${value}"
 		echo
 		newval="$(_scratch_xfs_get_metadata_field "${key}" "$@" 2> /dev/null)"
 		if [ "${key}" != "random" ] || [ "${oldval}" != "${newval}" ]; then
 			break;
 		fi
 	done
 	if [ "${oldval}" = "${newval}" ]; then
 		echo "Field ${key} already set to ${newval}, skipping test."
 		return 1
 	fi
 	return 0
 }

 # Try to forcibly unmount the scratch fs
 __scratch_xfs_fuzz_unmount()
 {
 	while _scratch_unmount 2>/dev/null; do sleep 0.2; done
 }

 # Restore metadata to scratch device prior to field-fuzzing.
 __scratch_xfs_fuzz_mdrestore()
 {
 	test -e "${POPULATE_METADUMP}" || _fail "Need to set POPULATE_METADUMP"

 	__scratch_xfs_fuzz_unmount
 	xfs_mdrestore "${POPULATE_METADUMP}" "${SCRATCH_DEV}"
 }

 __fuzz_notify() {
 	echo "$@"
 	test -w /dev/ttyprintk && echo "$@" >> /dev/ttyprintk
 }

 # Fuzz one field of some piece of metadata.
 # First arg is the field name
 # Second arg is the fuzz verb (ones, zeroes, random, add, sub...)
 # Third arg is the repair mode (online, offline, both)
 __scratch_xfs_fuzz_field_test() {
 	field="$1"
 	fuzzverb="$2"
 	repair="$3"
 	shift; shift; shift

 	# Set the new field value
 	__fuzz_notify "+ Fuzz ${field} = ${fuzzverb}"
 	echo "========================"
 	_scratch_xfs_fuzz_metadata_field "${field}" ${fuzzverb} "$@"
 	res=$?
 	test $res -ne 0 && return

 	# Try to catch the error with scrub
 	echo "+ Try to catch the error"
 	_try_scratch_mount 2>&1
 	res=$?
 	if [ $res -eq 0 ]; then
 		# Try an online scrub unless we're fuzzing ag 0's sb,
 		# which scrub doesn't know how to fix.
 		echo "++ Online scrub"
 		if [ "$1" != "sb 0" ]; then
 			_scratch_scrub -n -a 1 -e continue 2>&1
 			res=$?
 			test $res -eq 0 && \
 				(>&2 echo "scrub didn't fail with ${field} = ${fuzzverb}.")
 		fi

 		# Try fixing the filesystem online?!
 		if [ "${repair}" = "online" ] || [ "${repair}" = "both" ]; then
 			__fuzz_notify "++ Try to repair filesystem online"
 			_scratch_scrub 2>&1
 			res=$?
 			test $res -ne 0 && \
 				(>&2 echo "online repair failed ($res) with ${field} = ${fuzzverb}.")
 		fi

 		__scratch_xfs_fuzz_unmount
 	elif [ "${repair}" = "online" ] || [ "${repair}" = "both" ]; then
 		(>&2 echo "mount failed ($res) with ${field} = ${fuzzverb}.")
 	fi

 	# Repair the filesystem offline?
 	if [ "${repair}" = "offline" ] || [ "${repair}" = "both" ]; then
 		echo "+ Try to repair the filesystem offline"
 		_repair_scratch_fs 2>&1
 		res=$?
 		test $res -ne 0 && \
 			(>&2 echo "offline repair failed ($res) with ${field} = ${fuzzverb}.")
 	fi

 	# See if repair finds a clean fs
 	echo "+ Make sure error is gone (offline)"
         _scratch_xfs_repair -n 2>&1
 	res=$?
 	test $res -ne 0 && \
 		(>&2 echo "offline re-scrub ($res) with ${field} = ${fuzzverb}.")

 	# See if scrub finds a clean fs
 	echo "+ Make sure error is gone (online)"
 	_try_scratch_mount 2>&1
 	res=$?
 	if [ $res -eq 0 ]; then
 		# Try an online scrub unless we're fuzzing ag 0's sb,
 		# which scrub doesn't know how to fix.
 		echo "++ Online scrub"
 		if [ "$1" != "sb 0" ]; then
 			_scratch_scrub -n -e continue 2>&1
 			res=$?
 			test $res -ne 0 && \
 				(>&2 echo "online re-scrub ($res) with ${field} = ${fuzzverb}.")
 		fi

 		# Try modifying the filesystem again!
 		__fuzz_notify "++ Try to write filesystem again"
 		_scratch_fuzz_modify 100 2>&1
 		__scratch_xfs_fuzz_unmount
 	else
 		(>&2 echo "re-mount failed ($res) with ${field} = ${fuzzverb}.")
 	fi

 	# See if repair finds a clean fs
 	echo "+ Re-check the filesystem (offline)"
 	_scratch_xfs_repair -n 2>&1
 	res=$?
 	test $res -ne 0 && \
 		(>&2 echo "re-repair failed ($res) with ${field} = ${fuzzverb}.")
 }

 # Make sure we have all the pieces we need for field fuzzing
 _require_scratch_xfs_fuzz_fields()
 {
 	_require_scratch_nocheck
 	_require_scrub
 	_require_populate_commands
 	_scratch_mkfs_xfs >/dev/null 2>&1
 	_require_xfs_db_command "fuzz"
 }

 # Grab the list of available fuzzing verbs
 _scratch_xfs_list_fuzz_verbs() {
 	if [ -n "${SCRATCH_XFS_LIST_FUZZ_VERBS}" ]; then
 		echo "${SCRATCH_XFS_LIST_FUZZ_VERBS}" | tr '[ ,]' '[\n\n]'
 		return;
 	fi
 	_scratch_xfs_db -x -c 'sb 0' -c 'fuzz' | grep '^Fuzz commands:' | \
 		sed -e 's/[,.]//g' -e 's/Fuzz commands: //g' -e 's/ /\n/g'
 }

 # Fuzz some of the fields of some piece of metadata
 # The first argument is an egrep filter for the field names
 # The second argument is the repair mode (online, offline, both)
 # The rest of the arguments are xfs_db commands to locate the metadata.
 #
 # Users can specify the fuzz verbs via SCRATCH_XFS_LIST_FUZZ_VERBS
 # They can specify the fields via SCRATCH_XFS_LIST_METADATA_FIELDS
 _scratch_xfs_fuzz_metadata() {
 	filter="$1"
 	repair="$2"
 	shift; shift

 	fields="$(_scratch_xfs_list_metadata_fields "${filter}" "$@")"
 	verbs="$(_scratch_xfs_list_fuzz_verbs)"
 	echo "Fields we propose to fuzz under: $@"
 	echo $(echo "${fields}")
 	echo "Verbs we propose to fuzz with:"
 	echo $(echo "${verbs}")

 	echo "${fields}" | while read field; do
 		echo "${verbs}" | while read fuzzverb; do
 			__scratch_xfs_fuzz_mdrestore
 			__scratch_xfs_fuzz_field_test "${field}" "${fuzzverb}" "${repair}" "$@"
 		done
 	done
 }
	##/bin/bash

	# Routines for fuzzing and scrubbing a filesystem.
	#
	#-----------------------------------------------------------------------
	# Copyright (c) 2017 Oracle. All Rights Reserved.
	# This program is free software; you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation; either version 2 of the License, or
	# (at your option) any later version.
	#
	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	# GNU General Public License for more details.
	#
	# You should have received a copy of the GNU General Public License
	# along with this program; if not, write to the Free Software
	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	# USA
	#-----------------------------------------------------------------------

	# Modify various files after a fuzzing operation
	_scratch_fuzz_modify() {
	nr="$1"

	test -z "${nr}" && nr=50000
	echo "+++ touch ${nr} files"
	blk_sz=$(stat -f -c '%s' ${SCRATCH_MNT})
	$XFS_IO_PROG -f -c "pwrite -S 0x63 0 ${blk_sz}" "/tmp/afile" > /dev/null
	date="$(date)"
	find "${SCRATCH_MNT}/" -type f 2> /dev/null \| head -n "${nr}" \| while read f; do
	setfattr -n "user.date" -v "${date}" "$f"
	cat "/tmp/afile" >> "$f"
	mv "$f" "$f.longer"
	done
	sync
	rm -rf "/tmp/afile"

	echo "+++ create files"
	mkdir -p "${SCRATCH_MNT}/test.moo"
	$XFS_IO_PROG -f -c 'pwrite -S 0x80 0 65536' "${SCRATCH_MNT}/test.moo/urk" > /dev/null
	sync

	echo "+++ remove files"
	rm -rf "${SCRATCH_MNT}/test.moo"
	}

	# Try to access files after fuzzing
	_scratch_fuzz_test() {
	echo "+++ ls -laR" >> $seqres.full
	ls -laR "${SCRATCH_MNT}/test.1/" >/dev/null 2>&1

	echo "+++ cat files" >> $seqres.full
	(find "${SCRATCH_MNT}/test.1/" -type f -size -1048576k -print0 \| xargs -0 cat) >/dev/null 2>&1
	}

	# Do we have an online scrub program?
	_require_scrub() {
	case "${FSTYP}" in
	"xfs")
	test -x "$XFS_SCRUB_PROG" \|\| _notrun "xfs_scrub not found"
	;;
	*)
	_notrun "No online scrub program for ${FSTYP}."
	;;
	esac
	}

	# Scrub the scratch filesystem metadata (online)
	_scratch_scrub() {
	case "${FSTYP}" in
	"xfs")
	$XFS_SCRUB_PROG -d -T -v "$@" $SCRATCH_MNT
	;;
	*)
	_fail "No online scrub program for ${FSTYP}."
	;;
	esac
	}

	# Filter out any keys with an array index >= 10, collapse any array range
	# ("[1-195]") to the first item, and ignore padding fields.
	__filter_xfs_db_keys() {
	sed -e '/\([a-z]\)\[\([0-9][0-9]\+\)\]./d' \
	-e 's/\([a-zA-Z0-9_]\)\[\([0-9]\)-[0-9]*\]/\1[\2]/g' \
	-e '/pad/d'
	}

	# Filter the xfs_db print command's field debug information
	# into field name and type.
	__filter_xfs_db_print_fields() {
	filter="$1"
	if [ -z "${filter}" ] \|\| [ "${filter}" = "nofilter" ]; then
	filter='^'
	fi
	grep ' = ' \| while read key equals value; do
	fuzzkey="$(echo "${key}" \| __filter_xfs_db_keys)"
	if [ -z "${fuzzkey}" ]; then
	continue
	elif [[ "${value}" == "["* ]]; then
	echo "${value}" \| sed -e 's/^.//g' -e 's/.$//g' -e 's/,/\n/g' \| while read subfield; do
	echo "${fuzzkey}.${subfield}"
	done \| __filter_xfs_db_keys
	else
	echo "${fuzzkey}"
	fi
	done \| egrep "${filter}"
	}

	# Navigate to some part of the filesystem and print the field info.
	# The first argument is an egrep filter for the fields
	# The rest of the arguments are xfs_db commands to locate the metadata.
	_scratch_xfs_list_metadata_fields() {
	filter="$1"
	shift
	if [ -n "${SCRATCH_XFS_LIST_METADATA_FIELDS}" ]; then
	echo "${SCRATCH_XFS_LIST_METADATA_FIELDS}" \| tr '[ ,]' '[\n\n]'
	return;
	fi

	local cmds=()
	for arg in "$@"; do
	cmds+=("-c" "${arg}")
	done
	_scratch_xfs_db "${cmds[@]}" -c print \| __filter_xfs_db_print_fields "${filter}"
	}

	# Fuzz a metadata field
	# The first arg is the field name
	# The second arg is the xfs_db fuzz verb
	# The rest of the arguments are xfs_db commands to find the metadata.
	_scratch_xfs_fuzz_metadata_field() {
	key="$1"
	value="$2"
	shift; shift

	if [[ "${key}" == *crc ]]; then
	fuzz_arg="-c"
	else
	fuzz_arg="-d"
	fi
	oldval="$(_scratch_xfs_get_metadata_field "${key}" "$@")"

	local cmds=()
	for arg in "$@"; do
	cmds+=("-c" "${arg}")
	done
	while true; do
	_scratch_xfs_db -x "${cmds[@]}" -c "fuzz ${fuzz_arg} ${key} ${value}"
	echo
	newval="$(_scratch_xfs_get_metadata_field "${key}" "$@" 2> /dev/null)"
	if [ "${key}" != "random" ] \|\| [ "${oldval}" != "${newval}" ]; then
	break;
	fi
	done
	if [ "${oldval}" = "${newval}" ]; then
	echo "Field ${key} already set to ${newval}, skipping test."
	return 1
	fi
	return 0
	}

	# Try to forcibly unmount the scratch fs
	__scratch_xfs_fuzz_unmount()
	{
	while _scratch_unmount 2>/dev/null; do sleep 0.2; done
	}

	# Restore metadata to scratch device prior to field-fuzzing.
	__scratch_xfs_fuzz_mdrestore()
	{
	test -e "${POPULATE_METADUMP}" \|\| _fail "Need to set POPULATE_METADUMP"

	__scratch_xfs_fuzz_unmount
	xfs_mdrestore "${POPULATE_METADUMP}" "${SCRATCH_DEV}"
	}

	__fuzz_notify() {
	echo "$@"
	test -w /dev/ttyprintk && echo "$@" >> /dev/ttyprintk
	}

	# Fuzz one field of some piece of metadata.
	# First arg is the field name
	# Second arg is the fuzz verb (ones, zeroes, random, add, sub...)
	# Third arg is the repair mode (online, offline, both)
	__scratch_xfs_fuzz_field_test() {
	field="$1"
	fuzzverb="$2"
	repair="$3"
	shift; shift; shift

	# Set the new field value
	__fuzz_notify "+ Fuzz ${field} = ${fuzzverb}"
	echo "========================"
	_scratch_xfs_fuzz_metadata_field "${field}" ${fuzzverb} "$@"
	res=$?
	test $res -ne 0 && return

	# Try to catch the error with scrub
	echo "+ Try to catch the error"
	_try_scratch_mount 2>&1
	res=$?
	if [ $res -eq 0 ]; then
	# Try an online scrub unless we're fuzzing ag 0's sb,
	# which scrub doesn't know how to fix.
	echo "++ Online scrub"
	if [ "$1" != "sb 0" ]; then
	_scratch_scrub -n -a 1 -e continue 2>&1
	res=$?
	test $res -eq 0 && \
	(>&2 echo "scrub didn't fail with ${field} = ${fuzzverb}.")
	fi

	# Try fixing the filesystem online?!
	if [ "${repair}" = "online" ] \|\| [ "${repair}" = "both" ]; then
	__fuzz_notify "++ Try to repair filesystem online"
	_scratch_scrub 2>&1
	res=$?
	test $res -ne 0 && \
	(>&2 echo "online repair failed ($res) with ${field} = ${fuzzverb}.")
	fi

	__scratch_xfs_fuzz_unmount
	elif [ "${repair}" = "online" ] \|\| [ "${repair}" = "both" ]; then
	(>&2 echo "mount failed ($res) with ${field} = ${fuzzverb}.")
	fi

	# Repair the filesystem offline?
	if [ "${repair}" = "offline" ] \|\| [ "${repair}" = "both" ]; then
	echo "+ Try to repair the filesystem offline"
	_repair_scratch_fs 2>&1
	res=$?
	test $res -ne 0 && \
	(>&2 echo "offline repair failed ($res) with ${field} = ${fuzzverb}.")
	fi

	# See if repair finds a clean fs
	echo "+ Make sure error is gone (offline)"
	_scratch_xfs_repair -n 2>&1
	res=$?
	test $res -ne 0 && \
	(>&2 echo "offline re-scrub ($res) with ${field} = ${fuzzverb}.")

	# See if scrub finds a clean fs
	echo "+ Make sure error is gone (online)"
	_try_scratch_mount 2>&1
	res=$?
	if [ $res -eq 0 ]; then
	# Try an online scrub unless we're fuzzing ag 0's sb,
	# which scrub doesn't know how to fix.
	echo "++ Online scrub"
	if [ "$1" != "sb 0" ]; then
	_scratch_scrub -n -e continue 2>&1
	res=$?
	test $res -ne 0 && \
	(>&2 echo "online re-scrub ($res) with ${field} = ${fuzzverb}.")
	fi

	# Try modifying the filesystem again!
	__fuzz_notify "++ Try to write filesystem again"
	_scratch_fuzz_modify 100 2>&1
	__scratch_xfs_fuzz_unmount
	else
	(>&2 echo "re-mount failed ($res) with ${field} = ${fuzzverb}.")
	fi

	# See if repair finds a clean fs
	echo "+ Re-check the filesystem (offline)"
	_scratch_xfs_repair -n 2>&1
	res=$?
	test $res -ne 0 && \
	(>&2 echo "re-repair failed ($res) with ${field} = ${fuzzverb}.")
	}

	# Make sure we have all the pieces we need for field fuzzing
	_require_scratch_xfs_fuzz_fields()
	{
	_require_scratch_nocheck
	_require_scrub
	_require_populate_commands
	_scratch_mkfs_xfs >/dev/null 2>&1
	_require_xfs_db_command "fuzz"
	}

	# Grab the list of available fuzzing verbs
	_scratch_xfs_list_fuzz_verbs() {
	if [ -n "${SCRATCH_XFS_LIST_FUZZ_VERBS}" ]; then
	echo "${SCRATCH_XFS_LIST_FUZZ_VERBS}" \| tr '[ ,]' '[\n\n]'
	return;
	fi
	_scratch_xfs_db -x -c 'sb 0' -c 'fuzz' \| grep '^Fuzz commands:' \| \
	sed -e 's/[,.]//g' -e 's/Fuzz commands: //g' -e 's/ /\n/g'
	}

	# Fuzz some of the fields of some piece of metadata
	# The first argument is an egrep filter for the field names
	# The second argument is the repair mode (online, offline, both)
	# The rest of the arguments are xfs_db commands to locate the metadata.
	#
	# Users can specify the fuzz verbs via SCRATCH_XFS_LIST_FUZZ_VERBS
	# They can specify the fields via SCRATCH_XFS_LIST_METADATA_FIELDS
	_scratch_xfs_fuzz_metadata() {
	filter="$1"
	repair="$2"
	shift; shift

	fields="$(_scratch_xfs_list_metadata_fields "${filter}" "$@")"
	verbs="$(_scratch_xfs_list_fuzz_verbs)"
	echo "Fields we propose to fuzz under: $@"
	echo $(echo "${fields}")
	echo "Verbs we propose to fuzz with:"
	echo $(echo "${verbs}")

	echo "${fields}" \| while read field; do
	echo "${verbs}" \| while read fuzzverb; do
	__scratch_xfs_fuzz_mdrestore
	__scratch_xfs_fuzz_field_test "${field}" "${fuzzverb}" "${repair}" "$@"
	done
	done
	}