[PATCH v3 2/7] overlay: add fsck.overlay whiteout test

zhangyi (F)
2018-01-12T11:59:48Z

Add fsck.overlay test case to test it how to deal with orphan/valid
whiteouts in underlying directories of overlayfs.

Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
---
tests/overlay/201 | 232 ++++++++++++++++++++++++++++++++++++++++++++++++++
tests/overlay/201.out | 10 +++
tests/overlay/group | 1 +
3 files changed, 243 insertions(+)
create mode 100755 tests/overlay/201
create mode 100644 tests/overlay/201.out

diff --git a/tests/overlay/201 b/tests/overlay/201
new file mode 100755
index 0000000..fbb9898
--- /dev/null
+++ b/tests/overlay/201
@@ -0,0 +1,232 @@
+#! /bin/bash
+# FS QA Test 201
+#
+# Test fsck.overlay how to deal with whiteouts in overlayfs.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 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
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs overlay
+_supported_os Linux
+_require_scratch
+_require_command "$FSCK_OVERLAY_PROG" fsck.overlay
+
+# remove all files from previous tests
+_scratch_mkfs
+
+OVL_REDIRECT_XATTR="trusted.overlay.redirect"
+OVL_OPAQUE_XATTR="trusted.overlay.opaque"
+OVL_OPAQUE_XATTR_VAL="y"
+
+# Check whiteout
+check_whiteout()
+{
+ for arg in $*
+ do
+ local ttype=`stat -c "%F:%t,%T" $arg`
+
+ [[ $ttype == "character special file:0,0" ]] || \
+ echo "Valid whiteout removed incorrectly"
+ done
+}
+
+# Create a whiteout
+make_whiteout()
+{
+ for arg in $*
+ do
+ mknod $arg c 0 0
+ done
+}
+
+# Create an opaque directory
+make_opaque_dir()
+{
+ local target=$1
+
+ mkdir -p $target
+ $SETFATTR_PROG -n $OVL_OPAQUE_XATTR -v $OVL_OPAQUE_XATTR_VAL $target
+}
+
+# Create a redirect directory
+make_redirect_dir()
+{
+ local target=$1
+ local value=$2
+
+ mkdir -p $target
+ $SETFATTR_PROG -n $OVL_REDIRECT_XATTR -v $value $target
+}
+
+# Create test directories
+lowerdir=$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 orphan whiteout in lower and upper layer, should remove
+echo "+ Orphan whiteout"
+make_test_dirs
+make_whiteout $lowerdir/foo $upperdir/{foo,bar}
+
+_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
+ _fail "fsck should not fail"
+ls $lowerdir
+ls $upperdir
+
+# Test valid whiteout covering lower target, should not remove
+echo "+ Valid whiteout"
+make_test_dirs
+touch $lowerdir2/{foo,bar}
+make_whiteout $upperdir/foo $lowerdir/bar
+
+_overlay_fsck_dirs "$lowerdir:$lowerdir2" $upperdir $workdir -p >> \
+ $seqres.full 2>&1 || _fail "fsck should not fail"
+check_whiteout $upperdir/foo $lowerdir/bar
+
+# Test orphan whiteout in opaque directory, should remove
+echo "+ Orphan whiteout(2)"
+make_test_dirs
+mkdir $lowerdir/testdir
+touch $lowerdir/testdir/foo
+make_opaque_dir $upperdir/testdir
+make_whiteout $upperdir/testdir/foo
+
+_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
+ _fail "fsck should not fail"
+ls $upperdir/testdir
+
+# Test orphan whiteout whose parent path is not an merged directory,
+# should remove
+echo "+ Orphan whiteout(3)"
+make_test_dirs
+mkdir $lowerdir2/{testdir1,testdir2,testdir3}
+touch $lowerdir2/{testdir1/foo,testdir2/foo,testdir3/foo}
+mkdir $upperdir/{testdir1,testdir2,testdir3,testdir4}
+touch $lowerdir/testdir1
+make_whiteout $lowerdir/testdir2
+make_opaque_dir $lowerdir/testdir3
+make_whiteout $upperdir/{testdir1/foo,/testdir2/foo,testdir3/foo,testdir4/foo}
+
+_overlay_fsck_dirs "$lowerdir:$lowerdir2" $upperdir $workdir -p >> \
+ $seqres.full 2>&1 || _fail "fsck should not fail"
+ls $upperdir/testdir1
+ls $upperdir/testdir2
+ls $upperdir/testdir3
+ls $upperdir/testdir4
+
+# Test orphan whiteout in redirect directory, should remove
+echo "+ Orphan whiteout(4)"
+make_test_dirs
+mkdir $lowerdir/{testdir,origin}
+touch $lowerdir/testdir/foo
+make_redirect_dir $upperdir/testdir "origin"
+make_whiteout $upperdir/testdir/foo
+
+_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
+ _fail "fsck should not fail"
+ls $upperdir/testdir
+
+# Test valid whiteout in redirect directory cover file in lower
+# redirect origin directory, should not remove
+echo "+ Valid whiteout(2)"
+make_test_dirs
+mkdir $lowerdir/origin
+touch $lowerdir/origin/foo
+make_redirect_dir $upperdir/testdir "origin"
+make_whiteout $upperdir/testdir/foo
+
+_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
+ _fail "fsck should not fail"
+check_whiteout $upperdir/testdir/foo
+
+# Test valid whiteout covering lower target whose parent directory
+# merge with a redirect directory in the middle layer, should not remove.
+echo "+ Valid whiteout(3)"
+make_test_dirs
+mkdir -p $lowerdir2/origin/subdir
+touch $lowerdir2/origin/subdir/foo
+make_redirect_dir $lowerdir/testdir "origin"
+mkdir -p $upperdir/testdir/subdir
+make_whiteout $upperdir/testdir/subdir/foo
+
+_overlay_fsck_dirs "$lowerdir:$lowerdir2" $upperdir $workdir -p \
+ >> $seqres.full 2>&1 || _fail "fsck should not fail"
+check_whiteout $upperdir/testdir/subdir/foo
+
+# Test invalid whiteout in opaque subdirectory in a redirect directory,
+# should remove
+echo "+ Orphan whiteout(5)"
+make_test_dirs
+mkdir -p $lowerdir/origin/subdir
+touch $lowerdir/origin/subdir/foo
+make_redirect_dir $upperdir/testdir "origin"
+make_opaque_dir $upperdir/testdir/subdir
+make_whiteout $upperdir/testdir/subdir/foo
+
+_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
+ _fail "fsck should not fail"
+ls $upperdir/testdir/subdir
+
+# Test valid whiteout in reidrect subdirectory in a opaque directory
+# covering lower target, should not remove
+echo "+ Valid whiteout(4)"
+make_test_dirs
+mkdir $lowerdir/origin
+touch $lowerdir/origin/foo
+make_opaque_dir $upperdir/testdir
+make_redirect_dir $upperdir/testdir/subdir "/origin"
+make_whiteout $upperdir/testdir/subdir/foo
+
+_overlay_fsck_dirs $lowerdir $upperdir $workdir -p >> $seqres.full 2>&1 || \
+ _fail "fsck should not fail"
+check_whiteout $upperdir/testdir/subdir/foo
+
+# success, all done
+status=0
+exit
diff --git a/tests/overlay/201.out b/tests/overlay/201.out
new file mode 100644
index 0000000..157bb85
--- /dev/null
+++ b/tests/overlay/201.out
@@ -0,0 +1,10 @@
+QA output created by 201
++ Orphan whiteout
++ Valid whiteout
++ Orphan whiteout(2)
++ Orphan whiteout(3)
++ Orphan whiteout(4)
++ Valid whiteout(2)
++ Valid whiteout(3)
++ Orphan whiteout(5)
++ Valid whiteout(4)
diff --git a/tests/overlay/group b/tests/overlay/group
index 7e541e4..7c5fcbb 100644
--- a/tests/overlay/group
+++ b/tests/overlay/group
@@ -49,3 +49,4 @@
044 auto quick copyup hardlink nonsamefs
047 auto quick copyup hardlink
048 auto quick copyup hardlink
+201 auto quick fsck
--
2.9.5