qemu/tests/qemu-iotests/tests/image-fleecing
Emanuele Giuseppe Esposito 87e4d4a205 pylint: fix errors and warnings generated by tests/qemu-iotests/297
Test 297 in tests/qemu-iotests currently fails: pylint has
learned new things to check, or we simply missed them.

All fixes in this patch are related to additional spaces used
or wrong indentation. No functional change intended.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20211008062821.1010967-2-eesposit@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
2021-11-02 12:47:51 +01:00

194 lines
5.8 KiB
Python
Executable File

#!/usr/bin/env python3
# group: rw quick
#
# This test covers the basic fleecing workflow, which provides a
# point-in-time snapshot of a node that can be queried over NBD.
#
# Copyright (C) 2018 Red Hat, Inc.
# John helped, too.
#
# 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: John Snow <jsnow@redhat.com>
import iotests
from iotests import log, qemu_img, qemu_io, qemu_io_silent
iotests.script_initialize(
supported_fmts=['qcow2', 'qcow', 'qed', 'vmdk', 'vhdx', 'raw'],
supported_platforms=['linux'],
required_fmts=['copy-before-write'],
)
patterns = [('0x5d', '0', '64k'),
('0xd5', '1M', '64k'),
('0xdc', '32M', '64k'),
('0xcd', '0x3ff0000', '64k')] # 64M - 64K
overwrite = [('0xab', '0', '64k'), # Full overwrite
('0xad', '0x00f8000', '64k'), # Partial-left (1M-32K)
('0x1d', '0x2008000', '64k'), # Partial-right (32M+32K)
('0xea', '0x3fe0000', '64k')] # Adjacent-left (64M - 128K)
zeroes = [('0', '0x00f8000', '32k'), # Left-end of partial-left (1M-32K)
('0', '0x2010000', '32k'), # Right-end of partial-right (32M+64K)
('0', '0x3fe0000', '64k')] # overwrite[3]
remainder = [('0xd5', '0x108000', '32k'), # Right-end of partial-left [1]
('0xdc', '32M', '32k'), # Left-end of partial-right [2]
('0xcd', '0x3ff0000', '64k')] # patterns[3]
def do_test(use_cbw, base_img_path, fleece_img_path, nbd_sock_path, vm):
log('--- Setting up images ---')
log('')
assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
assert qemu_img('create', '-f', 'qcow2', fleece_img_path, '64M') == 0
for p in patterns:
qemu_io('-f', iotests.imgfmt,
'-c', 'write -P%s %s %s' % p, base_img_path)
log('Done')
log('')
log('--- Launching VM ---')
log('')
src_node = 'source'
tmp_node = 'temp'
qom_path = '/machine/peripheral/sda'
vm.add_blockdev(f'driver={iotests.imgfmt},file.driver=file,'
f'file.filename={base_img_path},node-name={src_node}')
vm.add_device('virtio-scsi')
vm.add_device(f'scsi-hd,id=sda,drive={src_node}')
vm.launch()
log('Done')
log('')
log('--- Setting up Fleecing Graph ---')
log('')
# create tmp_node backed by src_node
log(vm.qmp('blockdev-add', {
'driver': 'qcow2',
'node-name': tmp_node,
'file': {
'driver': 'file',
'filename': fleece_img_path,
},
'backing': src_node,
}))
# Establish CBW from source to fleecing node
if use_cbw:
log(vm.qmp('blockdev-add', {
'driver': 'copy-before-write',
'node-name': 'fl-cbw',
'file': src_node,
'target': tmp_node
}))
log(vm.qmp('qom-set', path=qom_path, property='drive', value='fl-cbw'))
else:
log(vm.qmp('blockdev-backup',
job_id='fleecing',
device=src_node,
target=tmp_node,
sync='none'))
log('')
log('--- Setting up NBD Export ---')
log('')
nbd_uri = 'nbd+unix:///%s?socket=%s' % (tmp_node, nbd_sock_path)
log(vm.qmp('nbd-server-start',
{'addr': {'type': 'unix',
'data': {'path': nbd_sock_path}}}))
log(vm.qmp('nbd-server-add', device=tmp_node))
log('')
log('--- Sanity Check ---')
log('')
for p in patterns + zeroes:
cmd = 'read -P%s %s %s' % p
log(cmd)
assert qemu_io_silent('-r', '-f', 'raw', '-c', cmd, nbd_uri) == 0
log('')
log('--- Testing COW ---')
log('')
for p in overwrite:
cmd = 'write -P%s %s %s' % p
log(cmd)
log(vm.hmp_qemu_io(qom_path, cmd, qdev=True))
log('')
log('--- Verifying Data ---')
log('')
for p in patterns + zeroes:
cmd = 'read -P%s %s %s' % p
log(cmd)
assert qemu_io_silent('-r', '-f', 'raw', '-c', cmd, nbd_uri) == 0
log('')
log('--- Cleanup ---')
log('')
if use_cbw:
log(vm.qmp('qom-set', path=qom_path, property='drive', value=src_node))
log(vm.qmp('blockdev-del', node_name='fl-cbw'))
else:
log(vm.qmp('block-job-cancel', device='fleecing'))
e = vm.event_wait('BLOCK_JOB_CANCELLED')
assert e is not None
log(e, filters=[iotests.filter_qmp_event])
log(vm.qmp('nbd-server-stop'))
log(vm.qmp('blockdev-del', node_name=tmp_node))
vm.shutdown()
log('')
log('--- Confirming writes ---')
log('')
for p in overwrite + remainder:
cmd = 'read -P%s %s %s' % p
log(cmd)
assert qemu_io_silent(base_img_path, '-c', cmd) == 0
log('')
log('Done')
def test(use_cbw):
with iotests.FilePath('base.img') as base_img_path, \
iotests.FilePath('fleece.img') as fleece_img_path, \
iotests.FilePath('nbd.sock',
base_dir=iotests.sock_dir) as nbd_sock_path, \
iotests.VM() as vm:
do_test(use_cbw, base_img_path, fleece_img_path, nbd_sock_path, vm)
log('=== Test backup(sync=none) based fleecing ===\n')
test(False)
log('=== Test filter based fleecing ===\n')
test(True)