1#!/usr/bin/env python3 2# 3# Copyright (C) 2017 Red Hat, Inc. 4# 5# This program is free software; you can redistribute it and/or modify 6# it under the terms of the GNU General Public License as published by 7# the Free Software Foundation; either version 2 of the License, or 8# (at your option) any later version. 9# 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14# 15# You should have received a copy of the GNU General Public License 16# along with this program. If not, see <http://www.gnu.org/licenses/>. 17# 18# Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com> 19# 20# Check that QMP 'migrate' with multiple drives on a single IOThread completes 21# successfully. This particular command triggered a hang in the source QEMU 22# process due to recursive AioContext locking in bdrv_invalidate_all() and 23# BDRV_POLL_WHILE(). 24 25import iotests 26 27iotests.verify_image_format(supported_fmts=['qcow2']) 28iotests.verify_platform(['linux']) 29 30with iotests.FilePath('disk0.img') as disk0_img_path, \ 31 iotests.FilePath('disk1.img') as disk1_img_path, \ 32 iotests.VM() as vm: 33 34 img_size = '10M' 35 iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, disk0_img_path, img_size) 36 iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, disk1_img_path, img_size) 37 38 iotests.log('Launching VM...') 39 (vm.add_object('iothread,id=iothread0') 40 .add_drive(disk0_img_path, 'node-name=drive0-node', interface='none') 41 .add_drive(disk1_img_path, 'node-name=drive1-node', interface='none') 42 .launch()) 43 44 iotests.log('Setting IOThreads...') 45 iotests.log(vm.qmp('x-blockdev-set-iothread', 46 node_name='drive0-node', iothread='iothread0', 47 force=True)) 48 iotests.log(vm.qmp('x-blockdev-set-iothread', 49 node_name='drive1-node', iothread='iothread0', 50 force=True)) 51 52 iotests.log('Enabling migration QMP events...') 53 iotests.log(vm.qmp('migrate-set-capabilities', capabilities=[ 54 { 55 'capability': 'events', 56 'state': True 57 } 58 ])) 59 60 iotests.log('Starting migration...') 61 iotests.log(vm.qmp('migrate', uri='exec:cat >/dev/null')) 62 while True: 63 event = vm.event_wait('MIGRATION') 64 iotests.log(event, filters=[iotests.filter_qmp_event]) 65 if event['data']['status'] == 'completed': 66 break 67