This patch adds some test cases how mirroring relates to filters. One
of them tests what happens when you mirror off a filtered COW node, two
others use the mirror filter node as basically our only example of an
implicitly created filter node so far (besides the commit filter).
Signed-off-by: Max Reitz <mre...@redhat.com>
---
tests/qemu-iotests/041 | 146 ++++++++++++++++++++++++++++++++++++-
tests/qemu-iotests/041.out | 4 +-
2 files changed, 147 insertions(+), 3 deletions(-)
diff --git a/tests/qemu-iotests/041 b/tests/qemu-iotests/041
index 186bd0f031..c21c8b36d5 100755
--- a/tests/qemu-iotests/041
+++ b/tests/qemu-iotests/041
@@ -20,8 +20,9 @@
import time
import os
+import json
import iotests
-from iotests import qemu_img, qemu_io
+from iotests import qemu_img, qemu_img_pipe, qemu_io
backing_img = os.path.join(iotests.test_dir, 'backing.img')
target_backing_img = os.path.join(iotests.test_dir, 'target-backing.img')
@@ -1185,5 +1186,148 @@ class TestReplaces(iotests.QMPTestCase):
os.remove(test_img)
os.remove(target_img)
+# Tests for mirror with filters (and how the mirror filter behaves, as
+# an example for an implicit filter)
+class TestFilters(iotests.QMPTestCase):
+ def setUp(self):
+ qemu_img('create', '-f', iotests.imgfmt, backing_img, '1M')
+ qemu_img('create', '-f', iotests.imgfmt, '-b', backing_img, test_img)
+ qemu_img('create', '-f', iotests.imgfmt, '-b', backing_img, target_img)
+
+ qemu_io('-c', 'write -P 1 0 512k', backing_img)
+ qemu_io('-c', 'write -P 2 512k 512k', test_img)
+
+ self.vm = iotests.VM()
+ self.vm.launch()
+
+ result = self.vm.qmp('blockdev-add', **{
+ 'node-name': 'target',
+ 'driver': iotests.imgfmt,
+ 'file': {
+ 'driver': 'file',
+ 'filename': target_img
+ },
+ 'backing': None
+ })
+ self.assert_qmp(result, 'return', {})
+
+ self.filterless_chain = {
+ 'node-name': 'source',
+ 'driver': iotests.imgfmt,
+ 'file': {
+ 'driver': 'file',
+ 'filename': test_img
+ },
+ 'backing': {
+ 'node-name': 'backing',
+ 'driver': iotests.imgfmt,
+ 'file': {
+ 'driver': 'file',
+ 'filename': backing_img
+ }
+ }
+ }
+
+ def tearDown(self):
+ self.vm.shutdown()
+
+ os.remove(test_img)
+ os.remove(target_img)
+ os.remove(backing_img)
+
+ def test_cor(self):
+ result = self.vm.qmp('blockdev-add', **{
+ 'node-name': 'filter',
+ 'driver': 'copy-on-read',
+ 'file': self.filterless_chain
+ })
+ self.assert_qmp(result, 'return', {})
+
+ result = self.vm.qmp('blockdev-mirror',
+ job_id='mirror',
+ device='filter',
+ target='target',
+ sync='top')
+ self.assert_qmp(result, 'return', {})
+
+ self.complete_and_wait('mirror')
+
+ self.vm.qmp('blockdev-del', node_name='target')
+
+ target_map = qemu_img_pipe('map', '--output=json', target_img)
+ target_map = json.loads(target_map)
+
+ assert target_map[0]['start'] == 0
+ assert target_map[0]['length'] == 512 * 1024
+ assert target_map[0]['depth'] == 1
+
+ assert target_map[1]['start'] == 512 * 1024
+ assert target_map[1]['length'] == 512 * 1024
+ assert target_map[1]['depth'] == 0
+
+ def test_implicit_mirror_filter(self):
+ result = self.vm.qmp('blockdev-add', **self.filterless_chain)
+ self.assert_qmp(result, 'return', {})
+
+ # We need this so we can query from above the mirror node
+ result = self.vm.qmp('device_add',
+ driver='virtio-blk',
+ id='virtio',
+ bus='pci.0',
+ drive='source')
+ self.assert_qmp(result, 'return', {})
+
+ result = self.vm.qmp('blockdev-mirror',
+ job_id='mirror',
+ device='source',
+ target='target',
+ sync='top')
+ self.assert_qmp(result, 'return', {})
+
+ # The mirror filter is now an implicit node, so it should be
+ # invisible when querying the backing chain
+ device_info = self.vm.qmp('query-block')['return'][0]
+ assert device_info['qdev'] ==
'/machine/peripheral/virtio/virtio-backend'
+
+ assert device_info['inserted']['node-name'] == 'source'
+
+ image_info = device_info['inserted']['image']
+ assert image_info['filename'] == test_img
+ assert image_info['backing-image']['filename'] == backing_img
+
+ self.complete_and_wait('mirror')
+
+ def test_explicit_mirror_filter(self):
+ # Same test as above, but this time we give the mirror filter
+ # a node-name so it will not be invisible
+ result = self.vm.qmp('blockdev-add', **self.filterless_chain)
+ self.assert_qmp(result, 'return', {})
+
+ # We need this so we can query from above the mirror node
+ result = self.vm.qmp('device_add',
+ driver='virtio-blk',
+ id='virtio',
+ bus='pci.0',
+ drive='source')
+ self.assert_qmp(result, 'return', {})
+
+ result = self.vm.qmp('blockdev-mirror',
+ job_id='mirror',
+ device='source',
+ target='target',
+ sync='top',
+ filter_node_name='mirror-filter')
+ self.assert_qmp(result, 'return', {})
+
+ # With a node-name given to it, the mirror filter should now
+ # be visible
+ device_info = self.vm.qmp('query-block')['return'][0]
+ assert device_info['qdev'] ==
'/machine/peripheral/virtio/virtio-backend'
+
+ assert device_info['inserted']['node-name'] == 'mirror-filter'
+
+ self.complete_and_wait('mirror')
+
+
if __name__ == '__main__':
iotests.main(supported_fmts=['qcow2', 'qed'])
diff --git a/tests/qemu-iotests/041.out b/tests/qemu-iotests/041.out
index d71481b010..2c448b4239 100644
--- a/tests/qemu-iotests/041.out
+++ b/tests/qemu-iotests/041.out
@@ -1,5 +1,5 @@
-.......................................................................................
+..........................................................................................
----------------------------------------------------------------------
-Ran 87 tests
+Ran 90 tests
OK
--
2.17.1
