tests/overlay/056

#! /bin/bash
# FS QA Test No. 056
#
# Test fsck.overlay how to deal with impure xattr in overlayfs.
#
#-----------------------------------------------------------------------
# Copyright (c) 2018 Huawei.  All Rights Reserved.
# Author: zhangyi (F) <yi.zhang@huawei.com>
#
# 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.
#
# This program is distributed in the hope that it would 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 the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#-----------------------------------------------------------------------
#

seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1        # failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	cd /
	rm -f $tmp.*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter
. ./common/attr

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here
_supported_fs overlay
_supported_os Linux
_require_scratch_nocheck
_require_attrs
_require_command "$FSCK_OVERLAY_PROG" fsck.overlay

OVL_XATTR_IMPURE_VAL=y

# remove all files from previous tests
_scratch_mkfs

# Create a redirect directory
make_redirect_dir()
{
	local target=$1
	local value=$2

	mkdir -p $target
	$SETFATTR_PROG -n $OVL_XATTR_REDIRECT -v $value $target
}

# Remove impure xattr
remove_impure()
{
	local target=$1

	$SETFATTR_PROG -x $OVL_XATTR_IMPURE $target
}

# Check impure xattr
check_impure()
{
	local target=$1

	value=$($GETFATTR_PROG --absolute-names --only-values -n \
		$OVL_XATTR_IMPURE $target)

	[[ "$value" == "$OVL_XATTR_IMPURE_VAL" ]] || echo "Missing impure xattr"
}

# Create test directories
lowerdir=$OVL_BASE_SCRATCH_MNT/lower
lowerdir2=$OVL_BASE_SCRATCH_MNT/lower2
upperdir=$OVL_BASE_SCRATCH_MNT/upper
workdir=$OVL_BASE_SCRATCH_MNT/workdir

make_test_dirs()
{
	rm -rf $lowerdir $lowerdir2 $upperdir $workdir
	mkdir -p $lowerdir $lowerdir2 $upperdir $workdir
}

# Test missing impure xattr in directory which has origin targets, should fix
echo "+ Missing impure"
make_test_dirs
mkdir $lowerdir/{testdir1,testdir2}
mkdir $upperdir/{testdir1,testdir2}
touch $lowerdir/testdir1/foo
mkdir $lowerdir/testdir2/subdir
_overlay_scratch_mount_dirs $lowerdir $upperdir $workdir
touch $SCRATCH_MNT/testdir1/foo
touch $SCRATCH_MNT/testdir2/subdir
$UMOUNT_PROG $SCRATCH_MNT
remove_impure $upperdir/testdir1
remove_impure $upperdir/testdir2

_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
	echo "fsck should not fail"
check_impure $upperdir/testdir1
check_impure $upperdir/testdir2

# Test missing impure xattr in directory which has redirect directories,
# should fix
echo "+ Missing impure(2)"
make_test_dirs
mkdir $lowerdir/origin
make_redirect_dir $upperdir/testdir/subdir "/origin"

_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
	echo "fsck should not fail"
check_impure $upperdir/testdir

# Test missing impure xattr in directory which has merge directories,
# should fix
echo "+ Missing impure(3)"
make_test_dirs
mkdir $lowerdir/testdir $upperdir/testdir

_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
	echo "fsck should not fail"
check_impure $upperdir

# success, all done
status=0
exit