fstests: test data integrity for rdonly remount

This test checks data integrity when remounting from rw to ro mode.

Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

tests/generic/599

@@ -0,0 +1,54 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2020 Chengguang Xu <cgxu519@mykernel.net>.
+# All Rights Reserved.
+#
+# FS QA Test 599
+#
+# Test data integrity for ro remount.
+#
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=0
+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 $seqres.full
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_fssum
+_require_scratch
+_require_scratch_shutdown
+
+_scratch_mkfs &>/dev/null
+_scratch_mount
+
+localdir=$SCRATCH_MNT/dir
+mkdir $localdir
+sync
+
+# fssum used for comparing checksum of test file(data & metedata),
+# exclude checking about atime, block structure, open error.
+$FSSUM_PROG -ugomAcdES -f -w $tmp.fssum $localdir
+_scratch_remount ro
+_scratch_shutdown
+_scratch_cycle_mount
+$FSSUM_PROG -r $tmp.fssum $localdir
+
+exit

tests/generic/599.out

@@ -0,0 +1,2 @@
+QA output created by 599
+OK

tests/generic/group

@@ -601,3 +601,4 @@
 596 auto quick
 597 auto quick perms
 598 auto quick perms
+599 auto quick remount shutdown