qemu-iotests: Test commit block job where top has two parents

Signed-off-by: NKevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/191

+#!/bin/bash
+#
+# Test commit block job where top has two parents
+#
+# Copyright (C) 2017 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=kwolf@redhat.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+status=1 # failure is the default!
+
+MIG_SOCKET="${TEST_DIR}/migrate"
+
+_cleanup()
+{
+    rm -f "${TEST_IMG}.mid"
+    rm -f "${TEST_IMG}.ovl2"
+    rm -f "${TEST_IMG}.ovl3"
+    _cleanup_test_img
+    _cleanup_qemu
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+. ./common.qemu
+
+_supported_fmt qcow2
+_unsupported_imgopts compat=0.10
+_supported_proto file
+_supported_os Linux
+
+size=64M
+
+echo
+echo === Preparing and starting VM ===
+echo
+
+TEST_IMG="${TEST_IMG}.base" _make_test_img $size
+TEST_IMG="${TEST_IMG}.mid" _make_test_img -b "${TEST_IMG}.base"
+_make_test_img -b "${TEST_IMG}.mid"
+TEST_IMG="${TEST_IMG}.ovl2" _make_test_img -b "${TEST_IMG}.mid"
+
+$QEMU_IO -c 'write -P 0x55 1M 64k' "${TEST_IMG}.mid" | _filter_qemu_io
+
+qemu_comm_method="qmp"
+qmp_pretty="y"
+
+_launch_qemu \
+    -blockdev "driver=${IMGFMT},file.driver=file,file.filename=${TEST_IMG}.base,node-name=base" \
+    -blockdev "driver=${IMGFMT},file.driver=file,file.filename=${TEST_IMG}.mid,node-name=mid,backing=base" \
+    -blockdev "driver=${IMGFMT},file.driver=file,file.filename=${TEST_IMG},node-name=top,backing=mid" \
+    -blockdev "driver=${IMGFMT},file.driver=file,file.filename=${TEST_IMG}.ovl2,node-name=top2,backing=mid"
+h=$QEMU_HANDLE
+_send_qemu_cmd $h "{ 'execute': 'qmp_capabilities' }" '^}'
+
+echo
+echo === Perform commit job ===
+echo
+
+_send_qemu_cmd $h \
+    "{ 'execute': 'block-commit',
+       'arguments': { 'job-id': 'commit0',
+                      'device': 'top',
+                      'base':'$TEST_IMG.base',
+                      'top': '$TEST_IMG.mid' } }" \
+    "BLOCK_JOB_COMPLETED"
+_send_qemu_cmd $h "" "^}"
+
+echo
+echo === Check that both top and top2 point to base now ===
+echo
+
+_send_qemu_cmd $h "{ 'execute': 'query-named-block-nodes' }" "^}" |
+    _filter_generated_node_ids
+
+_send_qemu_cmd $h "{ 'execute': 'quit' }" "^}"
+wait=1 _cleanup_qemu
+
+_img_info
+TEST_IMG="$TEST_IMG.ovl2" _img_info
+
+
+echo
+echo === Preparing and starting VM with -drive ===
+echo
+
+TEST_IMG="${TEST_IMG}.base" _make_test_img $size
+TEST_IMG="${TEST_IMG}.mid" _make_test_img -b "${TEST_IMG}.base"
+_make_test_img -b "${TEST_IMG}.mid"
+TEST_IMG="${TEST_IMG}.ovl2" _make_test_img -b "${TEST_IMG}.mid"
+TEST_IMG="${TEST_IMG}.ovl3" _make_test_img -b "${TEST_IMG}.ovl2"
+
+$QEMU_IO -c 'write -P 0x55 1M 64k' "${TEST_IMG}.mid" | _filter_qemu_io
+
+qemu_comm_method="qmp"
+qmp_pretty="y"
+
+_launch_qemu \
+    -drive "driver=${IMGFMT},file=${TEST_IMG},node-name=top,backing.node-name=mid" \
+    -drive "driver=${IMGFMT},file=${TEST_IMG}.ovl3,node-name=top2,backing.backing=mid"
+h=$QEMU_HANDLE
+_send_qemu_cmd $h "{ 'execute': 'qmp_capabilities' }" '^}'
+
+echo
+echo === Perform commit job ===
+echo
+
+_send_qemu_cmd $h \
+    "{ 'execute': 'block-commit',
+       'arguments': { 'job-id': 'commit0',
+                      'device': 'top',
+                      'base':'$TEST_IMG.base',
+                      'top': '$TEST_IMG.mid' } }" \
+    "BLOCK_JOB_COMPLETED"
+_send_qemu_cmd $h "" "^}"
+
+echo
+echo === Check that both top and top2 point to base now ===
+echo
+
+_send_qemu_cmd $h "{ 'execute': 'query-named-block-nodes' }" "^}" |
+    _filter_generated_node_ids
+
+_send_qemu_cmd $h "{ 'execute': 'quit' }" "^}"
+wait=1 _cleanup_qemu
+
+_img_info
+TEST_IMG="$TEST_IMG.ovl2" _img_info
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0

tests/qemu-iotests/group

@@ -188,6 +188,7 @@
 188 rw auto quick
 189 rw auto
 190 rw auto quick
+191 rw auto
 192 rw auto quick
 194 rw auto migration quick
 195 rw auto quick