qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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      1 #!/usr/bin/env python3
      2 # group: rw quick
      3 #
      4 # Tests for temporary external snapshot when we have bitmaps.
      5 #
      6 # Copyright (c) 2019 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 iotests
     23 from iotests import qemu_img_create, file_path, log, filter_qmp_event
     24 
     25 iotests.script_initialize(
     26     supported_fmts=['qcow2'],
     27     unsupported_imgopts=['compat']
     28 )
     29 
     30 base, top = file_path('base', 'top')
     31 size = 64 * 1024 * 3
     32 
     33 
     34 def print_bitmap(msg, vm):
     35     result = vm.qmp('query-block')['return'][0]
     36     info = result.get("inserted", {})
     37     if 'dirty-bitmaps' in info:
     38         bitmap = info['dirty-bitmaps'][0]
     39         log('{}: name={} dirty-clusters={}'.format(msg, bitmap['name'],
     40             bitmap['count'] // 64 // 1024))
     41     else:
     42         log(msg + ': not found')
     43 
     44 
     45 def test(persistent, restart):
     46     assert persistent or not restart
     47     log("\nTestcase {}persistent {} restart\n".format(
     48             '' if persistent else 'non-', 'with' if restart else 'without'))
     49 
     50     qemu_img_create('-f', iotests.imgfmt, base, str(size))
     51 
     52     vm = iotests.VM().add_drive(base)
     53     vm.launch()
     54 
     55     vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0',
     56                persistent=persistent)
     57     vm.hmp_qemu_io('drive0', 'write 0 64K')
     58     print_bitmap('initial bitmap', vm)
     59 
     60     vm.qmp_log('blockdev-snapshot-sync', device='drive0', snapshot_file=top,
     61                format=iotests.imgfmt, filters=[iotests.filter_qmp_testfiles])
     62     vm.hmp_qemu_io('drive0', 'write 64K 512')
     63     print_bitmap('check that no bitmaps are in snapshot', vm)
     64 
     65     if restart:
     66         log("... Restart ...")
     67         vm.shutdown()
     68         vm = iotests.VM().add_drive(top)
     69         vm.launch()
     70 
     71     vm.qmp_log('block-commit', device='drive0', top=top,
     72                filters=[iotests.filter_qmp_testfiles])
     73     ev = vm.events_wait((('BLOCK_JOB_READY', None),
     74                          ('BLOCK_JOB_COMPLETED', None)))
     75     log(filter_qmp_event(ev))
     76     if (ev['event'] == 'BLOCK_JOB_COMPLETED'):
     77         vm.shutdown()
     78         log(vm.get_log())
     79         exit()
     80 
     81     vm.qmp_log('block-job-complete', device='drive0')
     82     ev = vm.event_wait('BLOCK_JOB_COMPLETED')
     83     log(filter_qmp_event(ev))
     84     print_bitmap('check bitmap after commit', vm)
     85 
     86     vm.hmp_qemu_io('drive0', 'write 128K 64K')
     87     print_bitmap('check updated bitmap', vm)
     88 
     89     vm.shutdown()
     90 
     91 
     92 test(persistent=False, restart=False)
     93 test(persistent=True, restart=False)
     94 test(persistent=True, restart=True)