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iotests: 194: wait for migration completion on target too 

It is possible, that shutdown on target occurs earlier than migration
finish. In this case we crash in bdrv_release_dirty_bitmap_locked()
on assertion "assert(!bdrv_dirty_bitmap_busy(bitmap));" as we do have
busy bitmap, as bitmap migration is ongoing.

We'll fix bitmap migration to gracefully cancel on early shutdown soon.
Now let's fix iotest 194 to wait migration completion before shutdown.

Note that in this test dest_vm.shutdown() is called implicitly, as vms
used as context-providers, see __exit__() method of QEMUMachine class.

Actually, not waiting migration finish is a wrong thing, but the test
started to crash after commit ae00aa2398
"iotests: 194: test also migration of dirty bitmap", which added dirty
bitmaps here. So, Fixes: tag won't hurt.

Fixes: ae00aa2398
Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: grammar tweak]
Message-Id: <20200604083341.26978-1-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2020-06-04 11:33:41 +03:00 committed by Eric Blake
parent 31d321c2b3
commit 93d487807b
2 changed files with 15 additions and 0 deletions
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10
tests/qemu-iotests/194
View File

@ -87,4 +87,14 @@ with iotests.FilePath('source.img') as source_img_path, \
iotests.log(dest_vm.qmp('nbd-server-stop'))
break
iotests.log('Wait for migration completion on target...')
migr_events = (('MIGRATION', {'data': {'status': 'completed'}}),
('MIGRATION', {'data': {'status': 'failed'}}))
event = dest_vm.events_wait(migr_events)
iotests.log(event, filters=[iotests.filter_qmp_event])
iotests.log('Check bitmaps on source:')
iotests.log(source_vm.qmp('query-block')['return'][0]['dirty-bitmaps'])
iotests.log('Check bitmaps on target:')
iotests.log(dest_vm.qmp('query-block')['return'][0]['dirty-bitmaps'])

5
tests/qemu-iotests/194.out
View File

@ -21,4 +21,9 @@ Gracefully ending the `drive-mirror` job on source...
{"data": {"device": "mirror-job0", "len": 1073741824, "offset": 1073741824, "speed": 0, "type": "mirror"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
Stopping the NBD server on destination...
{"return": {}}
Wait for migration completion on target...
{"data": {"status": "completed"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
Check bitmaps on source:
[{"busy": false, "count": 0, "granularity": 65536, "name": "bitmap0", "persistent": false, "recording": true, "status": "active"}]
Check bitmaps on target:
[{"busy": false, "count": 0, "granularity": 65536, "name": "bitmap0", "persistent": false, "recording": true, "status": "active"}]