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#!/usr/bin/env python3
#
# Test json:{} filenames with qemu-internal BDSs
# (the one of commit, to be precise)
#
# 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: Max Reitz <mreitz@redhat.com>
import iotests
from iotests import log, qemu_img, qemu_io_silent, filter_qmp_testfiles, \
filter_qmp_imgfmt
import json
# Need backing file support (for arbitrary backing formats)
iotests.verify_image_format(supported_fmts=['qcow2', 'qcow', 'qed'])
iotests.verify_platform(['linux'])
# There are two variations of this test:
# (1) We do not set filter_node_name. In that case, the commit_top
# driver should not appear anywhere.
# (2) We do set filter_node_name. In that case, it should appear.
#
# This for loop executes both.
for filter_node_name in False, True:
log('')
log('--- filter_node_name: %s ---' % filter_node_name)
log('')
with iotests.FilePath('base.img') as base_img_path, \
iotests.FilePath('mid.img') as mid_img_path, \
iotests.FilePath('top.img') as top_img_path, \
iotests.VM() as vm:
assert qemu_img('create', '-f', iotests.imgfmt,
base_img_path, '64M') == 0
assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
mid_img_path) == 0
assert qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path,
top_img_path) == 0
# Something to commit
assert qemu_io_silent(mid_img_path, '-c', 'write -P 1 0 1M') == 0
vm.launch()
# Change the bottom-most image's backing file (to null-co://)
# to enforce json:{} filenames
vm.qmp_log('blockdev-add',
node_name='top',
driver=iotests.imgfmt,
file={
'driver': 'file',
'filename': top_img_path
},
backing={
'node-name': 'mid',
'driver': iotests.imgfmt,
'file': {
'driver': 'file',
'filename': mid_img_path
},
'backing': {
'node-name': 'base',
'driver': iotests.imgfmt,
'file': {
'driver': 'file',
'filename': base_img_path
},
'backing': {
'driver': 'null-co'
}
}
},
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
# As long as block-commit does not accept node names, we have to
# get our mid/base filenames here
mid_name = vm.node_info('mid')['image']['filename']
base_name = vm.node_info('base')['image']['filename']
assert mid_name[:5] == 'json:'
assert base_name[:5] == 'json:'
# Start the block job
if filter_node_name:
vm.qmp_log('block-commit',
job_id='commit',
device='top',
filter_node_name='filter_node',
top=mid_name,
base=base_name,
speed=1,
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
else:
vm.qmp_log('block-commit',
job_id='commit',
device='top',
top=mid_name,
base=base_name,
speed=1,
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
vm.qmp_log('job-pause', id='commit')
# Get and parse top's json:{} filename
top_name = vm.node_info('top')['image']['filename']
vm.shutdown()
assert top_name[:5] == 'json:'
top_options = json.loads(top_name[5:])
if filter_node_name:
# This should be present and set
assert top_options['backing']['driver'] == 'commit_top'
# And the mid image is commit_top's backing image
mid_options = top_options['backing']['backing']
else:
# The mid image should appear as the immediate backing BDS
# of top
mid_options = top_options['backing']
assert mid_options['driver'] == iotests.imgfmt
assert mid_options['file']['filename'] == mid_img_path
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