qemu_img_create('-f', iotests.imgfmt, disk_a, str(size))
qemu_img_create('-f', iotests.imgfmt, disk_b, str(size))
-srv = qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b)
-# Wait for NBD server availability
-t = 0
-ok = False
-while t < wait_limit:
- ok = qemu_io_silent_check('-f', 'raw', '-c', 'read 0 512', nbd_uri)
- if ok:
- break
- time.sleep(wait_step)
- t += wait_step
+with qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b):
+ vm = iotests.VM().add_drive(disk_a)
+ vm.launch()
+ vm.hmp_qemu_io('drive0', 'write 0 {}'.format(size))
+
+ vm.qmp_log('blockdev-add', filters=[iotests.filter_qmp_testfiles],
+ **{'node_name': 'backup0',
+ 'driver': 'raw',
+ 'file': {'driver': 'nbd',
+ 'server': {'type': 'unix', 'path': nbd_sock},
+ 'reconnect-delay': 10}})
+ vm.qmp_log('blockdev-backup', device='drive0', sync='full', target='backup0',
+ speed=(1 * 1024 * 1024))
+
+ # Wait for some progress
+ t = 0
+ while t < wait_limit:
+ jobs = vm.qmp('query-block-jobs')['return']
+ if jobs and jobs[0]['offset'] > 0:
+ break
+ time.sleep(wait_step)
+ t += wait_step
-assert ok
-
-vm = iotests.VM().add_drive(disk_a)
-vm.launch()
-vm.hmp_qemu_io('drive0', 'write 0 {}'.format(size))
-
-vm.qmp_log('blockdev-add', filters=[iotests.filter_qmp_testfiles],
- **{'node_name': 'backup0',
- 'driver': 'raw',
- 'file': {'driver': 'nbd',
- 'server': {'type': 'unix', 'path': nbd_sock},
- 'reconnect-delay': 10}})
-vm.qmp_log('blockdev-backup', device='drive0', sync='full', target='backup0',
- speed=(1 * 1024 * 1024))
-
-# Wait for some progress
-t = 0
-while t < wait_limit:
- jobs = vm.qmp('query-block-jobs')['return']
if jobs and jobs[0]['offset'] > 0:
- break
- time.sleep(wait_step)
- t += wait_step
-
-if jobs and jobs[0]['offset'] > 0:
- log('Backup job is started')
-
-log('Kill NBD server')
-srv.kill()
-srv.wait()
+ log('Backup job is started')
jobs = vm.qmp('query-block-jobs')['return']
if jobs and jobs[0]['offset'] < jobs[0]['len']:
# Emulate server down time for 1 second
time.sleep(1)
-log('Start NBD server')
-srv = qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b)
-
-e = vm.event_wait('BLOCK_JOB_COMPLETED')
-log('Backup completed: {}'.format(e['data']['offset']))
-
-vm.qmp_log('blockdev-del', node_name='backup0')
-srv.kill()
-vm.shutdown()
+with qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b):
+ e = vm.event_wait('BLOCK_JOB_COMPLETED')
+ log('Backup completed: {}'.format(e['data']['offset']))
+ vm.qmp_log('blockdev-del', node_name='backup0')
+ vm.shutdown()
import struct
import subprocess
import sys
+import time
from typing import (Any, Callable, Dict, Iterable,
List, Optional, Sequence, Tuple, TypeVar)
import unittest
+from contextlib import contextmanager
+
# pylint: disable=import-error, wrong-import-position
sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
from qemu import qtest
return subp.returncode, output if subp.returncode else ''
+@contextmanager
def qemu_nbd_popen(*args):
- '''Run qemu-nbd in daemon mode and return the parent's exit code'''
- return subprocess.Popen(qemu_nbd_args + ['--persistent'] + list(args))
+ '''Context manager running qemu-nbd within the context'''
+ pid_file = file_path("pid")
+
+ cmd = list(qemu_nbd_args)
+ cmd.extend(('--persistent', '--pid-file', pid_file))
+ cmd.extend(args)
+
+ log('Start NBD server')
+ p = subprocess.Popen(cmd)
+ try:
+ while not os.path.exists(pid_file):
+ if p.poll() is not None:
+ raise RuntimeError(
+ "qemu-nbd terminated with exit code {}: {}"
+ .format(p.returncode, ' '.join(cmd)))
+
+ time.sleep(0.01)
+ yield
+ finally:
+ log('Kill NBD server')
+ p.kill()
+ p.wait()
def compare_images(img1, img2, fmt1=imgfmt, fmt2=imgfmt):
'''Return True if two image files are identical'''