1#!/usr/bin/env python3 2# group: rw 3# 4# Tests for active mirroring 5# 6# Copyright (C) 2018 Red Hat, Inc. 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 22import os 23import iotests 24from iotests import qemu_img 25 26source_img = os.path.join(iotests.test_dir, 'source.' + iotests.imgfmt) 27target_img = os.path.join(iotests.test_dir, 'target.' + iotests.imgfmt) 28 29class TestActiveMirror(iotests.QMPTestCase): 30 image_len = 128 * 1024 * 1024 # MB 31 potential_writes_in_flight = True 32 33 def setUp(self): 34 qemu_img('create', '-f', iotests.imgfmt, source_img, '128M') 35 qemu_img('create', '-f', iotests.imgfmt, target_img, '128M') 36 37 blk_source = {'id': 'source', 38 'if': 'none', 39 'node-name': 'source-node', 40 'driver': iotests.imgfmt, 41 'file': {'driver': 'file', 42 'filename': source_img}} 43 44 blk_target = {'node-name': 'target-node', 45 'driver': iotests.imgfmt, 46 'file': {'driver': 'file', 47 'filename': target_img}} 48 49 self.vm = iotests.VM() 50 self.vm.add_drive_raw(self.vm.qmp_to_opts(blk_source)) 51 self.vm.add_blockdev(self.vm.qmp_to_opts(blk_target)) 52 self.vm.add_device('virtio-blk,drive=source') 53 self.vm.launch() 54 55 def tearDown(self): 56 self.vm.shutdown() 57 58 if not self.potential_writes_in_flight: 59 self.assertTrue(iotests.compare_images(source_img, target_img), 60 'mirror target does not match source') 61 62 os.remove(source_img) 63 os.remove(target_img) 64 65 def doActiveIO(self, sync_source_and_target): 66 # Fill the source image 67 self.vm.hmp_qemu_io('source', 68 'write -P 1 0 %i' % self.image_len); 69 70 # Start some background requests 71 for offset in range(1 * self.image_len // 8, 3 * self.image_len // 8, 1024 * 1024): 72 self.vm.hmp_qemu_io('source', 'aio_write -P 2 %i 1M' % offset) 73 for offset in range(2 * self.image_len // 8, 3 * self.image_len // 8, 1024 * 1024): 74 self.vm.hmp_qemu_io('source', 'aio_write -z %i 1M' % offset) 75 76 # Start the block job 77 result = self.vm.qmp('blockdev-mirror', 78 job_id='mirror', 79 filter_node_name='mirror-node', 80 device='source-node', 81 target='target-node', 82 sync='full', 83 copy_mode='write-blocking') 84 self.assert_qmp(result, 'return', {}) 85 86 # Start some more requests 87 for offset in range(3 * self.image_len // 8, 5 * self.image_len // 8, 1024 * 1024): 88 self.vm.hmp_qemu_io('source', 'aio_write -P 3 %i 1M' % offset) 89 for offset in range(4 * self.image_len // 8, 5 * self.image_len // 8, 1024 * 1024): 90 self.vm.hmp_qemu_io('source', 'aio_write -z %i 1M' % offset) 91 92 # Wait for the READY event 93 self.wait_ready(drive='mirror') 94 95 # Now start some final requests; all of these (which land on 96 # the source) should be settled using the active mechanism. 97 # The mirror code itself asserts that the source BDS's dirty 98 # bitmap will stay clean between READY and COMPLETED. 99 for offset in range(5 * self.image_len // 8, 7 * self.image_len // 8, 1024 * 1024): 100 self.vm.hmp_qemu_io('source', 'aio_write -P 3 %i 1M' % offset) 101 for offset in range(6 * self.image_len // 8, 7 * self.image_len // 8, 1024 * 1024): 102 self.vm.hmp_qemu_io('source', 'aio_write -z %i 1M' % offset) 103 104 if sync_source_and_target: 105 # If source and target should be in sync after the mirror, 106 # we have to flush before completion 107 self.vm.hmp_qemu_io('source', 'aio_flush') 108 self.potential_writes_in_flight = False 109 110 self.complete_and_wait(drive='mirror', wait_ready=False) 111 112 def testActiveIO(self): 113 self.doActiveIO(False) 114 115 def testActiveIOFlushed(self): 116 self.doActiveIO(True) 117 118 def testUnalignedActiveIO(self): 119 # Fill the source image 120 result = self.vm.hmp_qemu_io('source', 'write -P 1 0 2M') 121 122 # Start the block job (very slowly) 123 result = self.vm.qmp('blockdev-mirror', 124 job_id='mirror', 125 filter_node_name='mirror-node', 126 device='source-node', 127 target='target-node', 128 sync='full', 129 copy_mode='write-blocking', 130 buf_size=(1048576 // 4), 131 speed=1) 132 self.assert_qmp(result, 'return', {}) 133 134 # Start an unaligned request to a dirty area 135 result = self.vm.hmp_qemu_io('source', 'write -P 2 %i 1' % (1048576 + 42)) 136 137 # Let the job finish 138 result = self.vm.qmp('block-job-set-speed', device='mirror', speed=0) 139 self.assert_qmp(result, 'return', {}) 140 self.complete_and_wait(drive='mirror') 141 142 self.potential_writes_in_flight = False 143 144 145if __name__ == '__main__': 146 iotests.main(supported_fmts=['qcow2', 'raw'], 147 supported_protocols=['file']) 148