qemu/tests/qemu-iotests/273

#!/usr/bin/env bash
# group: backing quick
#
# Test multiple blockdev-snapshot calls with 'backing': null
#
# Copyright (C) 2019 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/>.
#

seq=$(basename "$0")
echo "QA output created by $seq"

status=1	# failure is the default!

_cleanup()
{
    _cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common.rc
. ./common.filter

# This is a qcow2 regression test
_supported_fmt qcow2
_supported_proto file fuse
_supported_os Linux
# External data files would add nodes to the block graph, so it would
# not match the reference output
_unsupported_imgopts data_file

do_run_qemu()
{
    echo Testing: "$@"
    $QEMU -nographic -qmp-pretty stdio -nodefaults "$@"
    echo
}

run_qemu()
{
    do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qemu | _filter_qmp |
        _filter_generated_node_ids | _filter_imgfmt |
        _filter_actual_image_size | _filter_img_info
}

TEST_IMG="$TEST_IMG.base" _make_test_img 64M
TEST_IMG="$TEST_IMG.mid" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT
_make_test_img -b "$TEST_IMG.mid" -F $IMGFMT

run_qemu \
    -blockdev file,node-name=base,filename="$TEST_IMG.base" \
     -blockdev file,node-name=midf,filename="$TEST_IMG.mid" \
     -blockdev '{"driver":"qcow2","node-name":"mid","file":"midf","backing":null}' \
     -blockdev file,node-name=topf,filename="$TEST_IMG" \
     -blockdev '{"driver":"qcow2","file":"topf","node-name":"top","backing":null}' \
<<EOF
{"execute":"qmp_capabilities"}
{"execute":"blockdev-snapshot","arguments":{"node":"base","overlay":"mid"}}
{"execute":"blockdev-snapshot","arguments":{"node":"mid","overlay":"top"}}
{"execute":"query-named-block-nodes"}
{"execute":"x-debug-query-block-graph"}
{"execute":"quit"}
EOF

# success, all done
echo "*** done"
rm -f $seq.full
status=0