qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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      1 #!/usr/bin/env python3
      2 # group: quick
      3 #
      4 # Simple mirror test
      5 #
      6 # Copyright (c) 2018 Virtuozzo International GmbH. All rights reserved.
      7 #
      8 # This program is free software; you can redistribute it and/or modify
      9 # it under the terms of the GNU General Public License as published by
     10 # the Free Software Foundation; either version 2 of the License, or
     11 # (at your option) any later version.
     12 #
     13 # This program is distributed in the hope that it will be useful,
     14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16 # GNU General Public License for more details.
     17 #
     18 # You should have received a copy of the GNU General Public License
     19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
     20 #
     21 
     22 import sys
     23 import os
     24 import iotests
     25 from iotests import qemu_img_create, qemu_io, file_path, log
     26 
     27 from qemu.machine import QEMUMachine
     28 
     29 iotests.script_initialize(supported_fmts=['qcow2'])
     30 
     31 # Note:
     32 # This test was added to check that mirror dead-lock was fixed (see previous
     33 # commit before this test addition).
     34 # And it didn't reproduce if at least one of the following:
     35 # 1. use small image size
     36 # 2. use raw format (not qcow2)
     37 # 3. drop kvm and use iotests.VM() (maybe, because of qtest) (however, it still
     38 #    reproduces, if just drop kvm, but gdb failed to produce full backtraces
     39 #    for me)
     40 # 4. add iothread
     41 
     42 size = 1 * 1024 * 1024 * 1024
     43 
     44 disk = file_path('disk')
     45 
     46 # prepare source image
     47 qemu_img_create('-f', iotests.imgfmt, '-o', 'preallocation=metadata', disk,
     48                 str(size))
     49 
     50 vm = QEMUMachine(iotests.qemu_prog)
     51 vm.add_args('-accel', 'kvm', '-accel', 'tcg')
     52 if iotests.qemu_default_machine == 's390-ccw-virtio':
     53         vm.add_args('-no-shutdown')
     54 vm.add_args('-drive', 'id=src,file=' + disk)
     55 vm.launch()
     56 
     57 log(vm.qmp('object-add', qom_type='throttle-group', id='tg0',
     58            limits={'bps-total': size}))
     59 
     60 log(vm.qmp('blockdev-add',
     61            **{ 'node-name': 'target',
     62                'driver': 'throttle',
     63                'throttle-group': 'tg0',
     64                'file': {
     65                    'driver': 'null-co',
     66                    'size': size
     67                 } }))
     68 
     69 log(vm.qmp('blockdev-mirror', device='src', target='target', sync='full'))
     70 
     71 try:
     72     vm.event_wait('BLOCK_JOB_READY', timeout=10.0)
     73 except:
     74     vm.shutdown()
     75     raise
     76 
     77 vm.shutdown()