Re: [PATCH v5] ext4: add test for all ext4/ext3/ext2 mount options

Eryu Guan
2021-11-07T13:58:04Z

On Thu, Nov 04, 2021 at 11:24:50AM +0100, Lukas Czerner wrote:
> Add test to validate that all the ext4, ext3 and ext2 are properly
> recognized, validate and applied to avoid regressions as ext4 moves to
> the new mount API.
>
> Signed-off-by: Lukas Czerner <lczerner@redhat.com>
> ---
> V2: Move minimum kernel version requirement up to 5.12
> Rewrite kernel_gte() to work correctly
> V3: Rename functions to not start with _
> V4: Check kernel config file to make sure the test works with
> various kernel configuration
> V5: Check /proc/config.gz for kernel config location first

Thanks for the revision! Test passed for me now in my test env.

>
> tests/ext4/053 | 650 +++++++++++++++++++++++++++++++++++++++++++++
> tests/ext4/053.out | 2 +
> 2 files changed, 652 insertions(+)
> create mode 100755 tests/ext4/053
> create mode 100644 tests/ext4/053.out
>
> diff --git a/tests/ext4/053 b/tests/ext4/053
> new file mode 100755
> index 00000000..c4447623
> --- /dev/null
> +++ b/tests/ext4/053
> @@ -0,0 +1,650 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2021 Red Hat, Inc., Lukas Czerner <lczerner@redhat.com>.
> +#
> +# FS QA Test 053
> +#
> +# Sanity check of ext4 mount options
> +#
> +. ./common/preamble
> +_begin_fstest auto mount
> +
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1 # failure is the default!
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +_cleanup()
> +{
> + cd /
> + $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
> + if [ -n "$LOOP_LOGDEV" ];then
> + _destroy_loop_device $LOOP_LOGDEV 2>/dev/null
> + fi
> + rm -f $tmp.*
> +}
> +
> +_has_kernel_config()
> +{
> + option=$1
> + config="/proc/config.gz"
> + if [ -f $config ]; then
> + gzip -cd $config | grep -qE "^${option}=[my]"

Should make sure gzip is available first. Define GZIP_PROG in
common/config then

_require_command "$GZIP_PROG" gzip

in _require_kernel_config.

> + return
> + fi
> + config="/lib/modules/$(uname -r)/build/.config"

Check if $config exists as well? I think the kconfig_path() function
from LTP as xuyang suggested looks good.

> + grep -qE "^${option}=[my]" $config
> +}
> +
> +_require_kernel_config()
> +{
> + _has_kernel_config $1 || _notrun "Installed kernel not built with $1"
> +}

Above two helpers could be made common in common/rc.

Thanks,
Eryu

> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +. ./common/quota
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +echo "Silence is golden."
> +
> +SIZE=$((1024 * 1024)) # 1GB in KB
> +LOGSIZE=$((10 *1024)) # 10MB in KB
> +
> +_supported_fs ext2 ext3 ext4
> +_require_scratch_size $SIZE
> +_require_quota
> +_require_loop
> +_require_command "$TUNE2FS_PROG" tune2fs
> +MKE2FS_PROG=$(type -P mke2fs)
> +_require_command "$MKE2FS_PROG" mke2fs
> +_require_kernel_config CONFIG_QFMT_V2
> +
> +LOG=""
> +print_log() {
> + LOG="$LOG $@"
> +}
> +
> +KERNEL_VERSION=`uname -r | cut -d'.' -f1,2`
> +KERNEL_MAJ=${KERNEL_VERSION%.*}
> +KERNEL_MIN=${KERNEL_VERSION#*.}
> +
> +kernel_gte() {
> + major=${1%.*}
> + minor=${1#*.}
> +
> + if [ $KERNEL_MAJ -gt $major ]; then
> + return 0
> + elif [[ $KERNEL_MAJ -eq $major && $KERNEL_MIN -ge $minor ]]; then
> + return 0
> + fi
> + return 1
> +}
> +
> +
> +# The aim here is to keep the mount options behaviour stable going forward
> +# so there is not much point in testing older kernels.
> +kernel_gte 5.12 || _notrun "This test is only relevant for kernel versions 5.12 and higher"
> +
> +IGNORED="remount,defaults,ignored,removed"
> +CHECK_MINFO="lazytime,noatime,nodiratime,noexec,nosuid,ro"
> +ERR=0
> +
> +test_mnt() {
> + findmnt -n $SCRATCH_DEV > /dev/null 2>&1
> + [ $? -ne 0 ] && return $?
> +
> + if [ $# -eq 1 ]; then
> + OPTS=$1
> + elif [ $# -eq 2 ]; then
> + OPTS=$2
> + else
> + return 0
> + fi
> +
> + print_log "checking \"$OPTS\" "
> + # test options in /proc/fs/ext4/dev/options
> + (
> + ret=0
> + IFS=','
> + for option in $OPTS; do
> + if echo $IGNORED | grep -w $option; then
> + continue
> + fi
> +
> + [ $option = "noload" ] && option="norecovery"
> +
> + if [[ $option = ^* ]]; then
> + expected=1
> + else
> + expected=0
> + fi
> + option=${option#^}
> +
> + if echo $CHECK_MINFO | grep -w $option; then
> + findmnt -n -o OPTIONS $SCRATCH_DEV | grep $option
> + ret=$?
> + else
> + grep $option /proc/fs/ext4/$(_short_dev $SCRATCH_DEV)/options
> + ret=$?
> + fi
> +
> + if [ $ret -ne $expected ]; then
> + exit 1
> + fi
> + done
> + ) > /dev/null 2>&1
> + return $?
> +}
> +
> +fail() {
> + print_log " FAILED"
> + ERR=$((ERR+1))
> + echo $LOG | tee -a $seqres.full
> + LOG=""
> +}
> +
> +ok() {
> + print_log " OK"
> + echo $LOG >> $seqres.full
> + LOG=""
> +}
> +
> +simple_mount() {
> + _mount $* >> $seqres.full 2>&1
> +}
> +
> +# $1 - can hold -n option, if it does argumetns are shifted
> +# $1 - options to test
> +# $2 - if provided it's the option string to check for
> +do_mnt() {
> + device=$SCRATCH_DEV
> + # If -n argument is provided do not specify $SCRATCH_DEV
> + # usefull for remount
> + if [ "$1" == "-n" ]; then
> + unset device
> + shift
> + fi
> +
> + if [ -z "$1" ]; then
> + simple_mount $device $SCRATCH_MNT
> + ret=$?
> + else
> + simple_mount -o $1 $device $SCRATCH_MNT
> + ret=$?
> + fi
> + if [ $ret -eq 0 ]; then
> + test_mnt $1 $2
> + ret=$?
> + [ $ret -ne 0 ] && print_log "(not found)"
> + else
> + print_log "(failed mount)"
> + fi
> +
> + return $ret
> +}
> +
> +not_mnt() {
> + # We don't need -t not not_ variant
> + if [ "$1" == "-t" ]; then
> + shift
> + fi
> +
> + print_log "SHOULD FAIL mounting $fstype \"$1\" "
> + do_mnt $@
> + if [ $? -eq 0 ]; then
> + fail
> + else
> + ok
> + fi
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> +}
> +
> +mnt_only() {
> + print_log "mounting $fstype \"$1\" "
> + do_mnt $@
> + if [ $? -ne 0 ]; then
> + fail
> + else
> + ok
> + fi
> +}
> +
> +mnt() {
> + # Do we need to run the tune2fs mount option test ?
> + t2fs=0
> + if [ "$1" == "-t" ]; then
> + t2fs=1
> + shift
> + fi
> +
> + mnt_only $*
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> +
> + [ "$t2fs" -eq 0 ] && return
> +
> + op_set=$1
> + if [ $# -eq 1 ]; then
> + check=$1
> + elif [ $# -eq 2 ]; then
> + check=$2
> + else
> + return 0
> + fi
> +
> + # some options need translation for tune2fs
> + op_set=$(echo $op_set | sed -e 's/data=journal/journal_data/' \
> + -e 's/data=ordered/journal_data_ordered/' \
> + -e 's/data=writeback/journal_data_writeback/')
> + $TUNE2FS_PROG -o $op_set $SCRATCH_DEV > /dev/null 2>&1
> + mnt_only "defaults" $check
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> + if [ "$op_set" = ^* ]; then
> + op_set=${op_set#^}
> + else
> + op_set="^${op_set}"
> + fi
> + $TUNE2FS_PROG -o $op_set $SCRATCH_DEV > /dev/null 2>&1
> +}
> +
> +# $1 - options to mount with
> +# $2 - options to remount with
> +remount() {
> + # First do this specifying both dev and mnt
> + print_log "mounting $fstype \"$1\" "
> + do_mnt $1
> + [ $? -ne 0 ] && fail && return
> + print_log "remounting \"$2\" "
> + do_mnt remount,$2 $3
> + if [ $? -ne 0 ]; then
> + fail
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> + return
> + else
> + ok
> + fi
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> +
> + # Now just specify mnt
> + print_log "mounting $fstype \"$1\" "
> + do_mnt $1
> + [ $? -ne 0 ] && fail && return
> + print_log "remounting (MNT ONLY) \"$2\" "
> + do_mnt -n remount,$2 $3
> + if [ $? -ne 0 ]; then
> + fail
> + else
> + ok
> + fi
> +
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> +}
> +
> +# $1 - options to mount with, or -r argument
> +# $2 - options to remount with
> +not_remount_noumount() {
> + remount_only=0
> + # If -r is specified we're going to do remount only
> + if [ "$1" == "-r" ]; then
> + remount_only=1
> + # Dont need shift since first argument would
> + # have been consumed by mount anyway
> + fi
> +
> + if [ $remount_only -eq 0 ]; then
> + print_log "mounting $fstype \"$1\" "
> + do_mnt $1
> + [ $? -ne 0 ] && fail && return
> + fi
> + print_log "SHOULD FAIL remounting $fstype \"$2\" "
> + do_mnt remount,$2 $3
> + if [ $? -eq 0 ]; then
> + fail
> + else
> + ok
> + fi
> +
> + # Now just specify mnt
> + print_log "SHOULD FAIL remounting $fstype (MNT ONLY) \"$2\" "
> + do_mnt -n remount,$2 $3
> + if [ $? -eq 0 ]; then
> + fail
> + else
> + ok
> + fi
> +}
> +
> +not_remount() {
> + not_remount_noumount $*
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> +}
> +
> +
> +do_mkfs() {
> + $MKE2FS_PROG -T $fstype -Fq $* >> $seqres.full 2>&1 ||
> + _fail "mkfs failed - $MKFS_EXT4_PROG -Fq $* $SCRATCH_DEV"
> +}
> +
> +not_ext2() {
> + if [[ $fstype == "ext2" ]]; then
> + not_$*
> + else
> + $*
> + fi
> +}
> +
> +only_ext4() {
> + if [[ $fstype == "ext4" ]]; then
> + $*
> + else
> + not_$*
> + fi
> +}
> +
> +# Create logdev for external journal
> +LOOP_IMG=$tmp.logdev
> +truncate -s ${LOGSIZE}k $LOOP_IMG
> +LOOP_LOGDEV=`_create_loop_device $LOOP_IMG`
> +majmin=`stat -c "%t:%T" $LOOP_LOGDEV`
> +LOGDEV_DEVNUM=`echo "${majmin%:*}*2^8 + ${majmin#*:}" | bc`
> +
> +# Test all the extN file system supported by ext4 driver
> +fstype=
> +for fstype in ext2 ext3 ext4; do
> +
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> + $UMOUNT_PROG $SCRATCH_DEV 2> /dev/null
> +
> + do_mkfs $SCRATCH_DEV ${SIZE}k
> +
> + # do we have fstype support ?
> + do_mnt
> + if [ $? -ne 0 ]; then
> + print_log "$fstype not supported. Skipping..."
> + ok
> + continue
> + fi
> + if [ ! -f /proc/fs/ext4/$(_short_dev $SCRATCH_DEV)/options ]; then
> + print_log "$fstype not supported. Skipping..."
> + ok
> + continue
> + fi
> +
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> +
> + not_mnt failme
> + mnt
> + mnt bsddf
> + mnt minixdf
> + mnt grpid
> + mnt -t bsdgroups grpid
> + mnt nogrpid
> + mnt sysvgroups nogrpid
> + mnt resgid=1001
> + mnt resuid=1001
> + mnt sb=131072
> + mnt errors=continue
> + mnt errors=panic
> + mnt errors=remount-ro
> + mnt nouid32
> + mnt debug
> + mnt oldalloc removed
> + mnt orlov removed
> + mnt -t user_xattr
> + mnt nouser_xattr
> +
> + if _has_kernel_config CONFIG_EXT4_FS_POSIX_ACL; then
> + mnt -t acl
> + else
> + mnt -t acl ^acl
> + fi
> +
> + not_ext2 mnt noload norecovery
> + mnt bh removed
> + mnt nobh removed
> + not_ext2 mnt commit=7
> + mnt min_batch_time=200
> + mnt max_batch_time=10000
> + only_ext4 mnt journal_checksum
> + only_ext4 mnt nojournal_checksum
> + only_ext4 mnt journal_async_commit,data=writeback
> + mnt abort ignored
> + not_ext2 mnt -t data=journal
> + not_ext2 mnt -t data=ordered
> + not_ext2 mnt -t data=writeback
> + not_ext2 mnt data_err=abort
> + not_ext2 mnt data_err=ignore ignored
> + mnt usrjquota=aquota.user,jqfmt=vfsv0
> + not_mnt usrjquota=aquota.user
> + mnt usrjquota= ignored
> + mnt grpjquota=aquota.group,jqfmt=vfsv0
> + not_mnt grpjquota=aquota.group
> + mnt grpjquota= ignored
> + mnt jqfmt=vfsold
> + mnt jqfmt=vfsv0
> + mnt jqfmt=vfsv1
> + mnt grpquota
> + mnt quota
> + mnt noquota
> + mnt usrquota
> + mnt grpquota
> + mnt barrier
> + mnt barrier=0 nobarrier
> + mnt barrier=1 barrier
> + mnt barrier=99 barrier
> + mnt -t nobarrier
> + mnt i_version
> + mnt stripe=512
> + only_ext4 mnt delalloc
> + only_ext4 mnt -t nodelalloc
> + mnt warn_on_error
> + mnt nowarn_on_error
> + not_mnt debug_want_extra_isize=512
> + mnt debug_want_extra_isize=32 ignored
> + mnt mblk_io_submit removed
> + mnt nomblk_io_submit removed
> + mnt -t block_validity
> + mnt noblock_validity
> + mnt inode_readahead_blks=16
> + not_ext2 mnt journal_ioprio=6 ignored
> + mnt auto_da_alloc=0 noauto_da_alloc
> + mnt auto_da_alloc=1 auto_da_alloc
> + mnt auto_da_alloc=95 auto_da_alloc
> + mnt auto_da_alloc
> + mnt noauto_da_alloc
> + only_ext4 mnt dioread_nolock
> + only_ext4 mnt nodioread_nolock
> + only_ext4 mnt dioread_lock nodioread_nolock
> + mnt -t discard
> + mnt nodiscard
> + mnt init_itable=20
> + mnt init_itable
> + mnt init_itable=0
> + mnt noinit_itable
> + mnt max_dir_size_kb=4096
> +
> + if _has_kernel_config CONFIG_FS_ENCRYPTION; then
> + mnt test_dummy_encryption
> + mnt test_dummy_encryption=v1
> + mnt test_dummy_encryption=v2
> + not_mnt test_dummy_encryption=v3
> + not_mnt test_dummy_encryption=
> + else
> + mnt test_dummy_encryption ^test_dummy_encryption
> + mnt test_dummy_encryption=v1 ^test_dummy_encryption=v1
> + mnt test_dummy_encryption=v2 ^test_dummy_encryption=v2
> + not_mnt test_dummy_encryption=v3
> + not_mnt test_dummy_encryption=
> + fi
> +
> + if _has_kernel_config CONFIG_FS_ENCRYPTION_INLINE_CRYPT; then
> + mnt inlinecrypt
> + else
> + mnt inlinecrypt ^inlinecrypt
> + fi
> +
> + mnt prefetch_block_bitmaps removed
> + mnt no_prefetch_block_bitmaps
> + # We don't currently have a way to know that the option has been
> + # applied, so comment it out for now. This should be fixed in the
> + # future.
> + #mnt mb_optimize_scan=0
> + #mnt mb_optimize_scan=1
> + #not_mnt mb_optimize_scan=9
> + #not_mnt mb_optimize_scan=
> + mnt nombcache
> + mnt no_mbcache nombcache
> + mnt check=none removed
> + mnt nocheck removed
> + mnt reservation removed
> + mnt noreservation removed
> + mnt journal=20 ignored
> + not_mnt nonsenseoption
> + not_mnt nonsenseoption=value
> +
> + # generic mount options
> + mnt lazytime
> + mnt nolazytime ^lazytime
> + mnt noatime
> + mnt nodiratime
> + mnt noexec
> + mnt nosuid
> + mnt ro
> +
> + # generic remount check
> + remount barrier nobarrier
> + remount nobarrier barrier
> + remount discard nodiscard
> + remount nodiscard discard
> +
> + # dax mount options
> + simple_mount -o dax=always $SCRATCH_DEV $SCRATCH_MNT > /dev/null 2>&1
> + if [ $? -eq 0 ]; then
> + $UMOUNT_PROG $SCRATCH_MNT 2> /dev/null
> + mnt dax
> + mnt dax=always
> + mnt dax=never
> + mnt dax=inode
> +
> + not_remount lazytime dax
> + not_remount dax=always dax=never
> +
> + if [[ $fstype != "ext2" ]]; then
> + not_remount data=journal dax
> + not_remount data=journal dax=always
> + not_remount data=journal dax=never
> + not_remount data=journal dax=inode
> + fi
> + fi
> +
> + # Quota remount check
> + remount grpquota usrquota
> + remount usrquota quota
> + remount usrquota usrjquota=q.u,jqfmt=vfsv0
> + remount grpquota grpjquota=q.g,jqfmt=vfsv0
> +
> + not_remount usrquota grpjquota=q.g,jqfmt=vfsv0
> + not_remount grpquota usrjquota=q.u,jqfmt=vfsv0
> +
> + remount quota usrjquota=q.u,jqfmt=vfsv0
> + not_remount quota grpjquota=q.g,jqfmt=vfsv0
> +
> + remount usrjquota=q.u,jqfmt=vfsv0 grpjquota=q.g
> + not_remount usrjquota=q.u,jqfmt=vfsv0 usrjquota=q.ua
> + not_remount grpjquota=q.g,jqfmt=vfsv0 grpjquota=q.ga
> +
> + remount usrjquota=q.u,jqfmt=vfsv0 usrquota usrjquota=q.u,jqfmt=vfsv0
> + remount grpjquota=q.g,jqfmt=vfsv0 grpquota grpjquota=q.g,jqfmt=vfsv0
> + not_remount usrjquota=q.u,jqfmt=vfsv0 grpquota
> + not_remount grpjquota=q.g,jqfmt=vfsv0 usrquota
> +
> + remount grpjquota=q.g,jqfmt=vfsv0 grpjquota= ^grpjquota=
> + remount usrjquota=q.u,jqfmt=vfsv0 usrjquota= ^usrjquota=
> + remount grpjquota=q.g,usrjquota=q.u,jqfmt=vfsv0 grpjquota=,usrjquota= ^grpjquota=,^usrjquota=
> +
> + remount jqfmt=vfsv0 grpjquota=q.g
> + remount jqfmt=vfsv0 usrjquota=q.u
> +
> + if [[ $fstype != "ext2" ]]; then
> + remount noload data=journal norecovery
> + not_remount data=ordered data=journal
> + not_remount data=journal data=writeback
> + not_remount data=writeback data=ordered
> + fi
> +
> + do_mkfs -O journal_dev $LOOP_LOGDEV ${LOGSIZE}k
> + do_mkfs -J device=$LOOP_LOGDEV $SCRATCH_DEV ${SIZE}k
> + mnt defaults
> + mnt journal_path=$LOOP_LOGDEV ignored
> + mnt journal_dev=$LOGDEV_DEVNUM ignored
> + not_mnt journal_path=${LOOP_LOGDEV}_nonexistent ignored
> + not_mnt journal_dev=123456 ignored
> + not_mnt journal_dev=999999999999999 ignored
> +
> + do_mkfs -E quotatype=prjquota $SCRATCH_DEV ${SIZE}k
> + mnt prjquota
> +
> + # test clearing/changing journalled quota when enabled
> + echo "== Testing active journalled quota" >> $seqres.full
> + mnt_only prjquota,grpjquota=aquota.group,usrjquota=aquota.user,jqfmt=vfsv0
> +
> + # Prepare and enable quota
> + quotacheck -vugm $SCRATCH_MNT >> $seqres.full 2>&1
> + quotaon -vug $SCRATCH_MNT >> $seqres.full 2>&1
> +
> + not_remount_noumount -r grpjquota=
> + not_remount_noumount -r usrjquota=aaquota.user
> + not_remount_noumount -r grpjquota=aaquota.group
> + not_remount_noumount -r jqfmt=vfsv1
> + not_remount_noumount -r noquota
> + mnt_only remount,usrquota,grpquota ^usrquota,^grpquota
> + $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
> +
> + # test clearing/changing quota when enabled
> + do_mkfs -E quotatype=^prjquota $SCRATCH_DEV ${SIZE}k
> + not_mnt prjquota
> + echo "== Testing active non-journalled quota" >> $seqres.full
> + mnt_only grpquota,usrquota
> +
> + # Prepare and enable quota
> + quotacheck -vugm $SCRATCH_MNT >> $seqres.full 2>&1
> + quotaon -vug $SCRATCH_MNT >> $seqres.full 2>&1
> +
> + not_remount_noumount -r noquota
> + not_remount_noumount -r usrjquota=aquota.user
> + not_remount_noumount -r grpjquota=aquota.group
> + not_remount_noumount -r jqfmt=vfsv1
> + mnt_only remount,grpjquota= grpquota,^grpjquota
> + mnt_only remount,usrjquota= usrquota,^usrjquota
> + mnt_only remount,usrquota,grpquota usrquota,grpquota
> + quotaoff -f $SCRATCH_MNT >> $seqres.full 2>&1
> + mnt_only remount,noquota ^usrquota,^grpquota,quota
> + $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
> +
> + # Quota feature
> + echo "== Testing quota feature " >> $seqres.full
> + do_mkfs -O quota -E quotatype=prjquota $SCRATCH_DEV ${SIZE}k
> + mnt usrjquota=aquota.user,jqfmt=vfsv0 ^usrjquota=
> + mnt grpjquota=aquota.user,jqfmt=vfsv0 ^grpjquota=
> + mnt jqfmt=vfsv1 ^jqfmt=
> + mnt prjquota
> + mnt usrquota
> + mnt grpquota
> + not_remount defaults usrjquota=aquota.user
> + not_remount defaults grpjquota=aquota.user
> + not_remount defaults jqfmt=vfsv1
> + remount defaults grpjquota=,usrjquota= ignored
> +
> +done #for fstype in ext2 ext3 ext4; do
> +
> +$UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
> +echo "$ERR errors encountered" >> $seqres.full
> +
> +status=$ERR
> +exit
> diff --git a/tests/ext4/053.out b/tests/ext4/053.out
> new file mode 100644
> index 00000000..d58db7e4
> --- /dev/null
> +++ b/tests/ext4/053.out
> @@ -0,0 +1,2 @@
> +QA output created by 053
> +Silence is golden.
> --
> 2.31.1