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(). Protect against regressions even though the AioContext 25# lock no longer exists. 26 27import iotests 28 29iotests.script_initialize(supported_fmts=['qcow2'], 30 supported_platforms=['linux']) 31 32with iotests.FilePath('disk0.img') as disk0_img_path, \ 33 iotests.FilePath('disk1.img') as disk1_img_path, \ 34 iotests.VM() as vm: 35 36 img_size = '10M' 37 iotests.qemu_img_create('-f', iotests.imgfmt, disk0_img_path, img_size) 38 iotests.qemu_img_create('-f', iotests.imgfmt, disk1_img_path, img_size) 39 40 iotests.log('Launching VM...') 41 (vm.add_object('iothread,id=iothread0') 42 .add_drive(disk0_img_path, 'node-name=drive0-node', interface='none') 43 .add_drive(disk1_img_path, 'node-name=drive1-node', interface='none') 44 .launch()) 45 46 iotests.log('Setting IOThreads...') 47 iotests.log(vm.qmp('x-blockdev-set-iothread', 48 node_name='drive0-node', iothread='iothread0', 49 force=True)) 50 iotests.log(vm.qmp('x-blockdev-set-iothread', 51 node_name='drive1-node', iothread='iothread0', 52 force=True)) 53 54 iotests.log('Enabling migration QMP events...') 55 iotests.log(vm.qmp('migrate-set-capabilities', capabilities=[ 56 { 57 'capability': 'events', 58 'state': True 59 } 60 ])) 61 62 iotests.log('Starting migration...') 63 iotests.log(vm.qmp('migrate', uri='exec:cat >/dev/null')) 64 while True: 65 event = vm.event_wait('MIGRATION') 66 iotests.log(event, filters=[iotests.filter_qmp_event]) 67 if event['data']['status'] == 'completed': 68 break 69