The unmerged and impure upper directories may contain invalid
whiteouts when we umount && modify lowerdir(e.g. clean up dir) and
remount overlay. This may lead to whiteouts exposure and rmdir
failure.
This case test impure dir's whiteouts check in ovl_iterate() and
ovl_remove_xxx().
Signed-off-by: zhangyi (F) <yi.zhang@xxxxxxxxxx>
---
tests/overlay/031 | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++
tests/overlay/031.out | 2 ++
tests/overlay/group | 1 +
3 files changed, 100 insertions(+)
create mode 100755 tests/overlay/031
create mode 100644 tests/overlay/031.out
diff --git a/tests/overlay/031 b/tests/overlay/031
new file mode 100755
index 0000000..674c11f
--- /dev/null
+++ b/tests/overlay/031
@@ -0,0 +1,97 @@
+#! /bin/bash
+# FS QA Test 031
+#
+# The unmerged and impure upper directories may contain invalid
+# whiteouts when we change lowerdir(e.g. clean up dir) and remount
+# overlay. This may lead to whiteouts exposure and rmdir failure.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 Huawei. 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.
+#
+# 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
+
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs overlay
+_supported_os Linux
+_require_scratch
+
+# remove all files from previous runs
+_scratch_mkfs
+
+# create test directory and test file
+lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
+upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
+workdir=$OVL_BASE_SCRATCH_MNT/$OVL_WORK
+mkdir -p $lowerdir/testdir
+touch $lowerdir/testdir/a
+
+# mount overlayfs and remove testfile to create a whiteout
+_scratch_mount
+
+rm -f $SCRATCH_MNT/testdir/a
+
+# unmount overlayfs but not base fs
+$UMOUNT_PROG $SCRATCH_MNT
+
+# clean up the lower directory and mount overlay again,
+# whiteout will expose.
+rm -rf $lowerdir/testdir
+
+_scratch_mount
+
+ls $SCRATCH_MNT/testdir
+
+# try to remove test dir from overlay dir, trigger ovl_remove_upper,
+# it will not clean up the dir and lead to rmdir failure.
+rm -rf $SCRATCH_MNT/testdir 2>&1 | _filter_scratch
+
+# umount overlay again, create a new file with the same name and
+# mount overlay again.
+$UMOUNT_PROG $SCRATCH_MNT
+touch $lowerdir/testdir
+
+_scratch_mount
+
+# try to remove test dir from overlay dir, trigger ovl_remove_and_whiteout,
+# it will not clean up the dir and lead to residue.
+rm -rf $SCRATCH_MNT/testdir 2>&1 | _filter_scratch
+ls $workdir/work
+
+# success, all done
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/overlay/031.out b/tests/overlay/031.out
new file mode 100644
index 0000000..b3d0bb0
--- /dev/null
+++ b/tests/overlay/031.out
@@ -0,0 +1,2 @@
+QA output created by 031
+Silence is golden
diff --git a/tests/overlay/group b/tests/overlay/group
index c5048c4..4001820 100644
--- a/tests/overlay/group
+++ b/tests/overlay/group
@@ -33,3 +33,4 @@
028 auto copyup quick
029 auto quick
030 auto quick perms
+031 auto quick
--
1.8.3.1
--
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