iotests/169: Test source cont with backing bmap

Test migrating from a VM with a persistent bitmap in the backing chain,
and then continuing that VM after the migration

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200730120234.49288-3-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Max Reitz 2020-07-30 14:02:34 +02:00 committed by Eric Blake
parent fe16c7ddf8
commit edadc99a2e
2 changed files with 65 additions and 3 deletions

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@ -24,11 +24,12 @@ import time
import itertools
import operator
import re
from iotests import qemu_img
from iotests import qemu_img, qemu_img_create, Timeout
disk_a = os.path.join(iotests.test_dir, 'disk_a')
disk_b = os.path.join(iotests.test_dir, 'disk_b')
base_a = os.path.join(iotests.test_dir, 'base_a')
size = '1M'
mig_file = os.path.join(iotests.test_dir, 'mig_file')
mig_cmd = 'exec: cat > ' + mig_file
@ -234,6 +235,67 @@ for cmb in list(itertools.product((True, False), repeat=2)):
inject_test_case(TestDirtyBitmapMigration, name,
'do_test_migration_resume_source', *list(cmb))
class TestDirtyBitmapBackingMigration(iotests.QMPTestCase):
def setUp(self):
qemu_img_create('-f', iotests.imgfmt, base_a, size)
qemu_img_create('-f', iotests.imgfmt, '-F', iotests.imgfmt,
'-b', base_a, disk_a, size)
for f in (disk_a, base_a):
qemu_img('bitmap', '--add', f, 'bmap0')
blockdev = {
'node-name': 'node0',
'driver': iotests.imgfmt,
'file': {
'driver': 'file',
'filename': disk_a
},
'backing': {
'node-name': 'node0-base',
'driver': iotests.imgfmt,
'file': {
'driver': 'file',
'filename': base_a
}
}
}
self.vm = iotests.VM()
self.vm.launch()
result = self.vm.qmp('blockdev-add', **blockdev)
self.assert_qmp(result, 'return', {})
# Check that the bitmaps are there
for node in self.vm.qmp('query-named-block-nodes', flat=True)['return']:
if 'node0' in node['node-name']:
self.assert_qmp(node, 'dirty-bitmaps[0]/name', 'bmap0')
caps = [{'capability': 'events', 'state': True}]
result = self.vm.qmp('migrate-set-capabilities', capabilities=caps)
self.assert_qmp(result, 'return', {})
def tearDown(self):
self.vm.shutdown()
for f in (disk_a, base_a):
os.remove(f)
def test_cont_on_source(self):
"""
Continue the source after migration.
"""
result = self.vm.qmp('migrate', uri=f'exec: cat > /dev/null')
self.assert_qmp(result, 'return', {})
with Timeout(10, 'Migration timeout'):
self.vm.wait_migration('postmigrate')
result = self.vm.qmp('cont')
self.assert_qmp(result, 'return', {})
if __name__ == '__main__':
iotests.main(supported_fmts=['qcow2'],
supported_protocols=['file'])

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@ -1,5 +1,5 @@
....................................
.....................................
----------------------------------------------------------------------
Ran 36 tests
Ran 37 tests
OK