Date:   Mon, 25 Oct 2021 10:06:57 +0200
From:   Lukas Czerner <lczerner@...hat.com>
To:     Eryu Guan <guan@...u.me>
Cc:     fstests@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: [PATCH v2] ext4: add test for all ext4/ext3/ext2 mount options

On Mon, Oct 25, 2021 at 12:31:28AM +0800, Eryu Guan wrote:
> On Wed, Oct 20, 2021 at 02:12:26PM +0200, 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@...hat.com>
> > ---
> > v2: Move minimum kernel version requirement up to 5.12
> >     Rewrite kernel_gte() to work correctly
> 
> fstests doesn't do version check but only actually try it and see if the
> wanted feature is supported, so I want to avoid this kernel version
> check as much as possible.
> 
> OTOH, I understand that there's no good way to tell if a mount option is
> supported by current kernel, and it's not clear a mount failure is
> caused by a regression or an unsupported mount option.

I understand that fstests doesn't do version checking and. But
the fact of the matter is that it is needed for this test for the
reasons you mentioned.

> 
> I'd like to see if anyone else has better ideas/suggestions.

So what's the goal here. Am I going to have to wait until someone comes
up with a better suggestion ?

> 
> Some minor issues below.
> 
> > +_mnt() {
> 
> Local functions don't need the _ prefix, that's for common helpers.

Ok, I can rename it.

-Lukas

> 
> > +	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 $*
> > +	$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 "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() {
> 
> Same here.
> 
> Thanks,
> Eryu
> 
> > +	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 $*
> > +	$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
> > +	mnt -t acl
> > +	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
> > +	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=
> > +	mnt inlinecrypt
> > +	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 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 -r grpjquota=
> > +	_not_remount -r usrjquota=aaquota.user
> > +	_not_remount -r grpjquota=aaquota.group
> > +	_not_remount -r jqfmt=vfsv1
> > +	_not_remount -r noquota
> > +	_mnt 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 grpquota,usrquota
> > +
> > +	# Prepare and enable quota
> > +	quotacheck -vugm $SCRATCH_MNT >> $seqres.full 2>&1
> > +	quotaon -vug $SCRATCH_MNT >> $seqres.full 2>&1
> > +
> > +	_not_remount -r noquota
> > +	_not_remount -r usrjquota=aquota.user
> > +	_not_remount -r grpjquota=aquota.group
> > +	_not_remount -r jqfmt=vfsv1
> > +	_mnt remount,grpjquota= grpquota,^grpjquota
> > +	_mnt remount,usrjquota= usrquota,^usrjquota
> > +	_mnt remount,usrquota,grpquota usrquota,grpquota
> > +	quotaoff -f $SCRATCH_MNT >> $seqres.full 2>&1
> > +	_mnt 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
> 

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