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https://github.com/Motorhead1991/qemu.git
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9548cbefff
Declare that we need copy-before-write filter to avoid failure when filter is not whitelisted. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Tested-by: Thomas Huth <thuth@redhat.com> Message-Id: <20220706170834.242277-1-vsementsov@yandex-team.ru> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
222 lines
7.3 KiB
Python
Executable file
222 lines
7.3 KiB
Python
Executable file
#!/usr/bin/env python3
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# group: auto backup
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#
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# Copyright (c) 2022 Virtuozzo International GmbH
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import re
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from qemu.machine import QEMUMachine
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import iotests
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from iotests import qemu_img_create, qemu_io
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temp_img = os.path.join(iotests.test_dir, 'temp')
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source_img = os.path.join(iotests.test_dir, 'source')
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size = '1M'
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class TestCbwError(iotests.QMPTestCase):
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def tearDown(self):
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self.vm.shutdown()
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os.remove(temp_img)
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os.remove(source_img)
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def setUp(self):
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qemu_img_create('-f', iotests.imgfmt, source_img, size)
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qemu_img_create('-f', iotests.imgfmt, temp_img, size)
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qemu_io('-c', 'write 0 1M', source_img)
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opts = ['-nodefaults', '-display', 'none', '-machine', 'none']
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self.vm = QEMUMachine(iotests.qemu_prog, opts,
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base_temp_dir=iotests.test_dir,
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sock_dir=iotests.sock_dir)
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self.vm.launch()
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def do_cbw_error(self, on_cbw_error):
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result = self.vm.qmp('blockdev-add', {
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'node-name': 'cbw',
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'driver': 'copy-before-write',
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'on-cbw-error': on_cbw_error,
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'file': {
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'driver': iotests.imgfmt,
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'file': {
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'driver': 'file',
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'filename': source_img,
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}
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},
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'target': {
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'driver': iotests.imgfmt,
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'file': {
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'driver': 'blkdebug',
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'image': {
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'driver': 'file',
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'filename': temp_img
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},
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'inject-error': [
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{
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'event': 'write_aio',
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'errno': 5,
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'immediately': False,
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'once': True
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}
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]
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}
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}
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})
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self.assert_qmp(result, 'return', {})
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result = self.vm.qmp('blockdev-add', {
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'node-name': 'access',
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'driver': 'snapshot-access',
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'file': 'cbw'
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})
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self.assert_qmp(result, 'return', {})
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result = self.vm.qmp('human-monitor-command',
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command_line='qemu-io cbw "write 0 1M"')
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self.assert_qmp(result, 'return', '')
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result = self.vm.qmp('human-monitor-command',
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command_line='qemu-io access "read 0 1M"')
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self.assert_qmp(result, 'return', '')
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self.vm.shutdown()
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log = self.vm.get_log()
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log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
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log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
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log = iotests.filter_qemu_io(log)
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return log
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def test_break_snapshot_on_cbw_error(self):
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"""break-snapshot behavior:
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Guest write succeed, but further snapshot-read fails, as snapshot is
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broken.
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"""
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log = self.do_cbw_error('break-snapshot')
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self.assertEqual(log, """\
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wrote 1048576/1048576 bytes at offset 0
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read failed: Permission denied
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""")
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def test_break_guest_write_on_cbw_error(self):
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"""break-guest-write behavior:
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Guest write fails, but snapshot-access continues working and further
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snapshot-read succeeds.
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"""
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log = self.do_cbw_error('break-guest-write')
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self.assertEqual(log, """\
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write failed: Input/output error
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read 1048576/1048576 bytes at offset 0
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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""")
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def do_cbw_timeout(self, on_cbw_error):
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result = self.vm.qmp('object-add', {
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'qom-type': 'throttle-group',
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'id': 'group0',
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'limits': {'bps-write': 300 * 1024}
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})
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self.assert_qmp(result, 'return', {})
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result = self.vm.qmp('blockdev-add', {
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'node-name': 'cbw',
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'driver': 'copy-before-write',
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'on-cbw-error': on_cbw_error,
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'cbw-timeout': 1,
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'file': {
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'driver': iotests.imgfmt,
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'file': {
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'driver': 'file',
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'filename': source_img,
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}
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},
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'target': {
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'driver': 'throttle',
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'throttle-group': 'group0',
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'file': {
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'driver': 'qcow2',
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'file': {
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'driver': 'file',
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'filename': temp_img
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}
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}
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}
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})
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self.assert_qmp(result, 'return', {})
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result = self.vm.qmp('blockdev-add', {
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'node-name': 'access',
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'driver': 'snapshot-access',
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'file': 'cbw'
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})
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self.assert_qmp(result, 'return', {})
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result = self.vm.qmp('human-monitor-command',
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command_line='qemu-io cbw "write 0 512K"')
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self.assert_qmp(result, 'return', '')
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# We need second write to trigger throttling
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result = self.vm.qmp('human-monitor-command',
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command_line='qemu-io cbw "write 512K 512K"')
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self.assert_qmp(result, 'return', '')
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result = self.vm.qmp('human-monitor-command',
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command_line='qemu-io access "read 0 1M"')
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self.assert_qmp(result, 'return', '')
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self.vm.shutdown()
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log = self.vm.get_log()
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log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
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log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
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log = iotests.filter_qemu_io(log)
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return log
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def test_timeout_break_guest(self):
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log = self.do_cbw_timeout('break-guest-write')
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# macOS and FreeBSD tend to represent ETIMEDOUT as
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# "Operation timed out", when Linux prefer
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# "Connection timed out"
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log = log.replace('Operation timed out',
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'Connection timed out')
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self.assertEqual(log, """\
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wrote 524288/524288 bytes at offset 0
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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write failed: Connection timed out
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read 1048576/1048576 bytes at offset 0
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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""")
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def test_timeout_break_snapshot(self):
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log = self.do_cbw_timeout('break-snapshot')
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self.assertEqual(log, """\
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wrote 524288/524288 bytes at offset 0
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 524288/524288 bytes at offset 524288
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read failed: Permission denied
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""")
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if __name__ == '__main__':
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iotests.main(supported_fmts=['qcow2'],
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supported_protocols=['file'],
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required_fmts=['copy-before-write'])
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