overlay: test workdir cleanup in mounting

"work" directory in workdir should be cleaned up
and recreated while overlayfs mounting. Or overlayfs
will be mounted read-only.

CC: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Xiong Zhou <xzhou@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

diff --git a/tests/overlay/024 b/tests/overlay/024
new file mode 100755 (executable)
index 0000000..2dbef12
--- /dev/null
+++ b/tests/overlay/024
@@ -0,0 +1,80 @@
+#! /bin/bash
+# FS QA Test 024
+#
+# "work" directory under workdir should be cleaned up
+# well on overlayfs startup, or overlayfs will be mounted
+# read-only.
+# Kernel commit below fixes it.
+# eea2fb4851e9 ovl: proper cleanup of workdir
+#
+# This reproducer was originally written by
+#     Miklos Szeredi <mszeredi@redhat.com>
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 Red Hat Inc.  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
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs overlay
+_supported_os Linux
+_require_scratch
+
+# Remove all files from previous tests
+_scratch_mkfs
+
+# making workdir
+wkdir=$SCRATCH_DEV/$OVERLAY_WORK_DIR
+mkdir -p $wkdir/work/foo
+
+_scratch_mount
+
+# try writing to mountpoint
+touch $SCRATCH_MNT/bar
+
+# checking work dir is clean
+if [ -e $wkdir/work/foo ] ; then
+       echo "work dir is not clean"
+else
+       echo "Silence is golden"
+fi
+# success, all done
+status=0
+exit

diff --git a/tests/overlay/024.out b/tests/overlay/024.out
new file mode 100644 (file)
index 0000000..fd6fbb1
--- /dev/null
+++ b/tests/overlay/024.out
@@ -0,0 +1,2 @@
+QA output created by 024
+Silence is golden

diff --git a/tests/overlay/group b/tests/overlay/group
index 09da1be2fcdbb29debf20ecc120c8d2af56770b7..0563a043b935935aa6d15c7f0261983ea1dce4c8 100644 (file)
--- a/tests/overlay/group
+++ b/tests/overlay/group
@@ -26,3 +26,4 @@
 021 auto quick copyup
 022 auto quick
 023 auto quick attr
+024 auto quick