#!/usr/bin/env python3 # # Test commit job graph modifications while requests are active # # Copyright (C) 2019 Red Hat, Inc. # # Creator/Owner: Kevin Wolf <kwolf@redhat.com> # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # import iotests from iotests import imgfmt iotests.script_initialize(supported_fmts=['qcow2']) iotests.log('Finishing a commit job with background reads') iotests.log('============================================') iotests.log('') with iotests.FilePath('t.qcow2') as disk_path, \ iotests.FilePath('t.qcow2.mid') as mid_path, \ iotests.FilePath('t.qcow2.base') as base_path, \ iotests.VM() as vm: iotests.log("=== Create backing chain and start VM ===") iotests.log("") size = 128 * 1024 * 1024 size_str = str(size) iotests.create_image(base_path, size) iotests.qemu_img_log('create', '-f', iotests.imgfmt, mid_path, size_str) iotests.qemu_img_log('create', '-f', iotests.imgfmt, disk_path, size_str) # Create a backing chain like this: # base <- [throttled: bps-read=4096] <- mid <- overlay vm.add_object('throttle-group,x-bps-read=4096,id=throttle0') vm.add_blockdev('file,filename=%s,node-name=base' % (base_path)) vm.add_blockdev('throttle,throttle-group=throttle0,file=base,node-name=throttled') vm.add_blockdev('file,filename=%s,node-name=mid-file' % (mid_path)) vm.add_blockdev('qcow2,file=mid-file,node-name=mid,backing=throttled') vm.add_drive_raw('if=none,id=overlay,driver=qcow2,file=%s,backing=mid' % (disk_path)) vm.launch() iotests.log("=== Start background read requests ===") iotests.log("") def start_requests(): vm.hmp_qemu_io('overlay', 'aio_read 0 4k') vm.hmp_qemu_io('overlay', 'aio_read 0 4k') start_requests() iotests.log("=== Run a commit job ===") iotests.log("") result = vm.qmp_log('block-commit', job_id='job0', auto_finalize=False, device='overlay', top_node='mid') vm.run_job('job0', auto_finalize=False, pre_finalize=start_requests, auto_dismiss=True) vm.shutdown() iotests.log('') iotests.log('Closing the VM while a job is being cancelled') iotests.log('=============================================') iotests.log('') with iotests.FilePath('src.qcow2') as src_path, \ iotests.FilePath('dst.qcow2') as dst_path, \ iotests.VM() as vm: iotests.log('=== Create images and start VM ===') iotests.log('') size = 128 * 1024 * 1024 size_str = str(size) iotests.qemu_img_log('create', '-f', iotests.imgfmt, src_path, size_str) iotests.qemu_img_log('create', '-f', iotests.imgfmt, dst_path, size_str) iotests.log(iotests.qemu_io('-f', iotests.imgfmt, '-c', 'write 0 1M', src_path), filters=[iotests.filter_test_dir, iotests.filter_qemu_io]) vm.add_object('throttle-group,x-bps-read=4096,id=throttle0') vm.add_blockdev('file,node-name=src-file,filename=%s' % (src_path)) vm.add_blockdev('%s,node-name=src,file=src-file' % (iotests.imgfmt)) vm.add_blockdev('file,node-name=dst-file,filename=%s' % (dst_path)) vm.add_blockdev('%s,node-name=dst,file=dst-file' % (iotests.imgfmt)) vm.add_blockdev('throttle,node-name=src-throttled,' + 'throttle-group=throttle0,file=src') vm.add_device('virtio-blk,drive=src-throttled') vm.launch() iotests.log('=== Start a mirror job ===') iotests.log('') vm.qmp_log('blockdev-mirror', job_id='job0', device='src-throttled', target='dst', sync='full') vm.qmp_log('block-job-cancel', device='job0') vm.qmp_log('quit') vm.shutdown(has_quit=True)