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 auto migration quick
      3 #
      4 # Copyright (C) 2017 Red Hat, Inc.
      5 #
      6 # This program is free software; you can redistribute it and/or modify
      7 # it under the terms of the GNU General Public License as published by
      8 # the Free Software Foundation; either version 2 of the License, or
      9 # (at your option) any later version.
     10 #
     11 # This program is distributed in the hope that it will be useful,
     12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14 # GNU General Public License for more details.
     15 #
     16 # You should have received a copy of the GNU General Public License
     17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
     18 #
     19 # Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com>
     20 #
     21 # Check that QMP 'migrate' with multiple drives on a single IOThread completes
     22 # successfully.  This particular command triggered a hang in the source QEMU
     23 # process due to recursive AioContext locking in bdrv_invalidate_all() and
     24 # BDRV_POLL_WHILE().
     25 
     26 import iotests
     27 
     28 iotests.script_initialize(supported_fmts=['qcow2'],
     29                           supported_platforms=['linux'])
     30 
     31 with iotests.FilePath('disk0.img') as disk0_img_path, \
     32      iotests.FilePath('disk1.img') as disk1_img_path, \
     33      iotests.VM() as vm:
     34 
     35     img_size = '10M'
     36     iotests.qemu_img_create('-f', iotests.imgfmt, disk0_img_path, img_size)
     37     iotests.qemu_img_create('-f', iotests.imgfmt, disk1_img_path, img_size)
     38 
     39     iotests.log('Launching VM...')
     40     (vm.add_object('iothread,id=iothread0')
     41        .add_drive(disk0_img_path, 'node-name=drive0-node', interface='none')
     42        .add_drive(disk1_img_path, 'node-name=drive1-node', interface='none')
     43        .launch())
     44 
     45     iotests.log('Setting IOThreads...')
     46     iotests.log(vm.qmp('x-blockdev-set-iothread',
     47                        node_name='drive0-node', iothread='iothread0',
     48                        force=True))
     49     iotests.log(vm.qmp('x-blockdev-set-iothread',
     50                        node_name='drive1-node', iothread='iothread0',
     51                        force=True))
     52 
     53     iotests.log('Enabling migration QMP events...')
     54     iotests.log(vm.qmp('migrate-set-capabilities', capabilities=[
     55         {
     56             'capability': 'events',
     57             'state': True
     58         }
     59     ]))
     60 
     61     iotests.log('Starting migration...')
     62     iotests.log(vm.qmp('migrate', uri='exec:cat >/dev/null'))
     63     while True:
     64         event = vm.event_wait('MIGRATION')
     65         iotests.log(event, filters=[iotests.filter_qmp_event])
     66         if event['data']['status'] == 'completed':
     67             break