iotests: prepare 124 and 257 bitmap querying for backup-top filter

After backup-top filter appearing it's not possible to see dirty
bitmaps in top node, so use node-name instead.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190920142056.12778-10-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 9fb5181c3d..3a8f378f90 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -641,6 +641,33 @@ class VM(qtest.QEMUQtestMachine):
                 return x
         return None
 
+    def query_bitmaps(self):
+        res = self.qmp("query-named-block-nodes")
+        return {device['node-name']: device['dirty-bitmaps']
+                for device in res['return'] if 'dirty-bitmaps' in device}
+
+    def get_bitmap(self, node_name, bitmap_name, recording=None, bitmaps=None):
+        """
+        get a specific bitmap from the object returned by query_bitmaps.
+        :param recording: If specified, filter results by the specified value.
+        :param bitmaps: If specified, use it instead of call query_bitmaps()
+        """
+        if bitmaps is None:
+            bitmaps = self.query_bitmaps()
+
+        for bitmap in bitmaps[node_name]:
+            if bitmap.get('name', '') == bitmap_name:
+                if recording is None:
+                    return bitmap
+                elif bitmap.get('recording') == recording:
+                    return bitmap
+        return None
+
+    def check_bitmap_status(self, node_name, bitmap_name, fields):
+        ret = self.get_bitmap(node_name, bitmap_name)
+
+        return fields.items() <= ret.items()
+
 
 index_re = re.compile(r'([^\[]+)\[([^\]]+)\]')