@@ -51,3 +51,8 @@ notes=FIXME,
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max-line-length=79
+
+
+[SIMILARITIES]
+
+min-similarity-lines=6
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@@ -0,0 +1,132 @@
+#!/usr/bin/env python3
+# group: auto backup
+#
+# Copyright (c) 2022 Virtuozzo International GmbH
+#
+# 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 os
+import re
+
+from qemu.machine import QEMUMachine
+
+import iotests
+from iotests import qemu_img_create, qemu_io
+
+
+temp_img = os.path.join(iotests.test_dir, 'temp')
+source_img = os.path.join(iotests.test_dir, 'source')
+size = '1M'
+
+
+class TestCbwError(iotests.QMPTestCase):
+ def tearDown(self):
+ self.vm.shutdown()
+ os.remove(temp_img)
+ os.remove(source_img)
+
+ def setUp(self):
+ qemu_img_create('-f', iotests.imgfmt, source_img, size)
+ qemu_img_create('-f', iotests.imgfmt, temp_img, size)
+ qemu_io('-c', 'write 0 1M', source_img)
+
+ self.vm = QEMUMachine(iotests.qemu_prog)
+ self.vm.launch()
+
+ def do_cbw_error(self, on_cbw_error):
+ result = self.vm.qmp('blockdev-add', {
+ 'node-name': 'cbw',
+ 'driver': 'copy-before-write',
+ 'on-cbw-error': on_cbw_error,
+ 'file': {
+ 'driver': iotests.imgfmt,
+ 'file': {
+ 'driver': 'file',
+ 'filename': source_img,
+ }
+ },
+ 'target': {
+ 'driver': iotests.imgfmt,
+ 'file': {
+ 'driver': 'blkdebug',
+ 'image': {
+ 'driver': 'file',
+ 'filename': temp_img
+ },
+ 'inject-error': [
+ {
+ 'event': 'write_aio',
+ 'errno': 5,
+ 'immediately': False,
+ 'once': True
+ }
+ ]
+ }
+ }
+ })
+ self.assert_qmp(result, 'return', {})
+
+ result = self.vm.qmp('blockdev-add', {
+ 'node-name': 'access',
+ 'driver': 'snapshot-access',
+ 'file': 'cbw'
+ })
+ self.assert_qmp(result, 'return', {})
+
+ result = self.vm.qmp('human-monitor-command',
+ command_line='qemu-io cbw "write 0 1M"')
+ self.assert_qmp(result, 'return', '')
+
+ result = self.vm.qmp('human-monitor-command',
+ command_line='qemu-io access "read 0 1M"')
+ self.assert_qmp(result, 'return', '')
+
+ self.vm.shutdown()
+ log = self.vm.get_log()
+ log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
+ log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
+ log = iotests.filter_qemu_io(log)
+ return log
+
+ def test_break_snapshot_on_cbw_error(self):
+ """break-snapshot behavior:
+ Guest write succeed, but further snapshot-read fails, as snapshot is
+ broken.
+ """
+ log = self.do_cbw_error('break-snapshot')
+
+ self.assertEqual(log, """\
+wrote 1048576/1048576 bytes at offset 0
+1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read failed: Permission denied
+""")
+
+ def test_break_guest_write_on_cbw_error(self):
+ """break-guest-write behavior:
+ Guest write fails, but snapshot-access continues working and further
+ snapshot-read succeeds.
+ """
+ log = self.do_cbw_error('break-guest-write')
+
+ self.assertEqual(log, """\
+write failed: Input/output error
+read 1048576/1048576 bytes at offset 0
+1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+""")
+
+
+if __name__ == '__main__':
+ iotests.main(supported_fmts=['qcow2'],
+ supported_protocols=['file'])
new file mode 100644
@@ -0,0 +1,5 @@
+..
+----------------------------------------------------------------------
+Ran 2 tests
+
+OK
Add tests for new option of copy-before-write filter: on-cbw-error. Note that we use QEMUMachine instead of VM class, because in further commit we'll want to use throttling which doesn't work with -accel qtest used by VM. We also touch pylintrc to not break iotest 297. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@openvz.org> --- tests/qemu-iotests/pylintrc | 5 + tests/qemu-iotests/tests/copy-before-write | 132 ++++++++++++++++++ .../qemu-iotests/tests/copy-before-write.out | 5 + 3 files changed, 142 insertions(+) create mode 100755 tests/qemu-iotests/tests/copy-before-write create mode 100644 tests/qemu-iotests/tests/copy-before-write.out