iotests: Add VMDK backing file correlation test
This new test verifies that VMDK backing file reads fail when the
backing file has a non-matching CID. This includes non-VMDK backing
files.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180702210721.4847-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
diff --git a/tests/qemu-iotests/225 b/tests/qemu-iotests/225
new file mode 100755
index 0000000..f2ee715
--- /dev/null
+++ b/tests/qemu-iotests/225
@@ -0,0 +1,132 @@
+#!/bin/bash
+#
+# Test vmdk backing file correlation
+#
+# Copyright (C) 2018 Red Hat, Inc.
+#
+# 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; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=mreitz@redhat.com
+
+seq=$(basename $0)
+echo "QA output created by $seq"
+
+here=$PWD
+status=1 # failure is the default!
+
+_cleanup()
+{
+ _cleanup_test_img
+ rm -f "$TEST_IMG.not_base"
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+. ./common.qemu
+
+# This tests vmdk-specific low-level functionality
+_supported_fmt vmdk
+_supported_proto file
+_supported_os Linux
+_unsupported_imgopts "subformat=monolithicFlat" \
+ "subformat=twoGbMaxExtentFlat" \
+ "subformat=twoGbMaxExtentSparse"
+
+TEST_IMG="$TEST_IMG.base" _make_test_img 1M
+TEST_IMG="$TEST_IMG.not_base" _make_test_img 1M
+_make_test_img -b "$TEST_IMG.base"
+
+make_opts()
+{
+ node_name=$1
+ filename=$2
+ backing=$3
+
+ if [ -z "$backing" ]; then
+ backing="null"
+ else
+ backing="'$backing'"
+ fi
+
+ echo "{ 'node-name': '$node_name',
+ 'driver': 'vmdk',
+ 'file': {
+ 'driver': 'file',
+ 'filename': '$filename'
+ },
+ 'backing': $backing }"
+}
+
+overlay_opts=$(make_opts overlay "$TEST_IMG" backing)
+base_opts=$(make_opts backing "$TEST_IMG.base")
+not_base_opts=$(make_opts backing "$TEST_IMG.not_base")
+
+not_vmdk_opts="{ 'node-name': 'backing', 'driver': 'null-co' }"
+
+echo
+echo '=== Testing fitting VMDK backing image ==='
+echo
+
+qemu_comm_method=monitor \
+ _launch_qemu -blockdev "$base_opts" -blockdev "$overlay_opts"
+
+# Should not return an error
+_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'ops'
+
+_cleanup_qemu
+
+
+echo
+echo '=== Testing unrelated VMDK backing image ==='
+echo
+
+qemu_comm_method=monitor \
+ _launch_qemu -blockdev "$not_base_opts" -blockdev "$overlay_opts"
+
+# Should fail (gracefully)
+_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'failed'
+
+_cleanup_qemu
+
+
+echo
+echo '=== Testing non-VMDK backing image ==='
+echo
+
+# FIXME: This is the reason why we have to use two -blockdev
+# invocations. You can only fully override the backing file options
+# if you either specify a node reference (as done here) or the new
+# options contain file.filename (which in this case they do not).
+# In other cases, file.filename will be set to whatever the image
+# header of the overlay contains (which we do not want). I consider
+# this a FIXME because with -blockdev, you cannot specify "partial"
+# options, so setting file.filename but leaving the rest as specified
+# by the user does not make sense.
+qemu_comm_method=monitor \
+ _launch_qemu -blockdev "$not_vmdk_opts" -blockdev "$overlay_opts"
+
+# Should fail (gracefully)
+_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'failed'
+
+_cleanup_qemu
+
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
