[PATCH v2 12/20] iotests: 56: prepare for backup over block-copy

[Vladimir Sementsov-Ogievskiy]

After introducing parallel async copy requests instead of plain
cluster-by-cluster copying loop, we'll have to wait for paused status,
as we need to wait for several parallel request. So, let's gently wait
instead of just asserting that job already paused.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 tests/qemu-iotests/056 | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tests/qemu-iotests/056 b/tests/qemu-iotests/056
index f73fc74457..2ced356a43 100755
--- a/tests/qemu-iotests/056
+++ b/tests/qemu-iotests/056
@@ -306,8 +306,12 @@ class BackupTest(iotests.QMPTestCase):
         event = self.vm.event_wait(name="BLOCK_JOB_ERROR",
                                    match={'data': {'device': 'drive0'}})
         self.assertNotEqual(event, None)
-        # OK, job should be wedged
-        res = self.vm.qmp('query-block-jobs')
+        # OK, job should pause, but it can't do it immediately, as it can't
+        # cancel other parallel requests (which didn't fail)
+        while True:
+            res = self.vm.qmp('query-block-jobs')
+            if res['return'][0]['status'] == 'paused':
+                break
         self.assert_qmp(res, 'return[0]/status', 'paused')
         res = self.vm.qmp('block-job-dismiss', id='drive0')
         self.assert_qmp(res, 'error/desc',
-- 
2.21.0