To test the failure case, we modify iotests.py to allow us to specify
that we'd like to allow failures when we wait for block job events.
Reviewed-by: Max Reitz <mre...@redhat.com>
Signed-off-by: John Snow <js...@redhat.com>
---
tests/qemu-iotests/124 | 57 ++++++++++++++++++++++++++++++++++++++++++-
tests/qemu-iotests/124.out | 4 +--
tests/qemu-iotests/iotests.py | 6 +++--
3 files changed, 62 insertions(+), 5 deletions(-)
diff --git a/tests/qemu-iotests/124 b/tests/qemu-iotests/124
index da8f0e0..1c07387 100644
--- a/tests/qemu-iotests/124
+++ b/tests/qemu-iotests/124
@@ -135,7 +135,11 @@ class TestIncrementalBackup(iotests.QMPTestCase):
mode='existing')
self.assert_qmp(result, 'return', {})
- event = self.wait_until_completed(bitmap.node, check_offset=validate)
+ event = self.wait_until_completed(bitmap.node, check_offset=validate,
+ allow_failures=(not validate))
+ if 'error' in event['data']:
+ bitmap.del_target()
+ return False
if validate:
return self.check_incremental(target)
@@ -180,6 +184,57 @@ class TestIncrementalBackup(iotests.QMPTestCase):
return True
+ def test_incremental_failure(self):
+ '''Test: Verify backups made after a failure are correct.
+
+ Simulate a failure during an incremental backup block job,
+ emulate additional writes, then create another incremental backup
+ afterwards and verify that the backup created is correct.
+ '''
+
+ # Create a blkdebug interface to this img as 'drive1'
+ result = self.vm.qmp('blockdev-add', options={
+ 'id': 'drive1',
+ 'driver': iotests.imgfmt,
+ 'file': {
+ 'driver': 'blkdebug',
+ 'image': {
+ 'driver': 'file',
+ 'filename': self.test_img
+ },
+ 'set-state': [{
+ 'event': 'flush_to_disk',
+ 'state': 1,
+ 'new_state': 2
+ }],
+ 'inject-error': [{
+ 'event': 'read_aio',
+ 'errno': 5,
+ 'state': 2,
+ 'immediately': False,
+ 'once': True
+ }],
+ }
+ })
+ self.assert_qmp(result, 'return', {})
+
+ self.create_full_backup()
+ self.add_bitmap('bitmap0', 'drive1')
+ # Note: at this point, during a normal execution,
+ # Assume that the VM resumes and begins issuing IO requests here.
+
+ self.hmp_io_writes('drive1', (('0xab', 0, 512),
+ ('0xfe', '16M', '256k'),
+ ('0x64', '32736k', '64k')))
+
+ result = self.create_incremental(validate=False)
+ self.assertFalse(result)
+ self.hmp_io_writes('drive1', (('0x9a', 0, 512),
+ ('0x55', '8M', '352k'),
+ ('0x78', '15872k', '1M')))
+ self.create_incremental()
+
+
def test_sync_dirty_bitmap_missing(self):
self.assert_no_active_block_jobs()
self.files.append(self.foo_img)
diff --git a/tests/qemu-iotests/124.out b/tests/qemu-iotests/124.out
index 8d7e996..89968f3 100644
--- a/tests/qemu-iotests/124.out
+++ b/tests/qemu-iotests/124.out
@@ -1,5 +1,5 @@
-...
+....
----------------------------------------------------------------------
-Ran 3 tests
+Ran 4 tests
OK
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 1402854..0522501 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -273,14 +273,16 @@ class QMPTestCase(unittest.TestCase):
self.assert_no_active_block_jobs()
return result
- def wait_until_completed(self, drive='drive0', check_offset=True):
+ def wait_until_completed(self, drive='drive0', check_offset=True,
+ allow_failures=False):
'''Wait for a block job to finish, returning the event'''
completed = False
while not completed:
for event in self.vm.get_qmp_events(wait=True):
if event['event'] == 'BLOCK_JOB_COMPLETED':
self.assert_qmp(event, 'data/device', drive)
- self.assert_qmp_absent(event, 'data/error')
+ if not allow_failures:
+ self.assert_qmp_absent(event, 'data/error')
if check_offset:
self.assert_qmp(event, 'data/offset',
event['data']['len'])
completed = True
--
1.9.3
