tests: qemublock: Add checkpoint deletion test for deep backing chain

Add test cases for merging various pairs of bitmaps when snapshots were
created together with checkpoints.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

tests/qemublocktest.c

@@ -1019,6 +1019,12 @@ mymain(void)
     TEST_CHECKPOINT_DELETE_MERGE("basic-intermediate3", "d", "c", "basic");
     TEST_CHECKPOINT_DELETE_MERGE("basic-current", "current", "d", "basic");
 
+    TEST_CHECKPOINT_DELETE_MERGE("snapshots-noparent", "a", NULL, "snapshots");
+    TEST_CHECKPOINT_DELETE_MERGE("snapshots-intermediate1", "b", "a", "snapshots");
+    TEST_CHECKPOINT_DELETE_MERGE("snapshots-intermediate2", "c", "b", "snapshots");
+    TEST_CHECKPOINT_DELETE_MERGE("snapshots-intermediate3", "d", "c", "snapshots");
+    TEST_CHECKPOINT_DELETE_MERGE("snapshots-current", "current", "d", "snapshots");
+
  cleanup:
     virHashFree(diskxmljsondata.schema);
     qemuTestDriverFree(&driver);

tests/qemublocktestdata/checkpointdelete/snapshots-current-out.json

+[
+  {
+    "type": "block-dirty-bitmap-enable",
+    "data": {
+      "node": "libvirt-1-format",
+      "name": "d"
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-merge",
+    "data": {
+      "node": "libvirt-1-format",
+      "target": "d",
+      "bitmaps": [
+        {
+          "node": "libvirt-1-format",
+          "name": "current"
+        }
+      ]
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-1-format",
+      "name": "current"
+    }
+  }
+]

tests/qemublocktestdata/checkpointdelete/snapshots-intermediate1-out.json

+[
+  {
+    "type": "block-dirty-bitmap-merge",
+    "data": {
+      "node": "libvirt-3-format",
+      "target": "a",
+      "bitmaps": [
+        {
+          "node": "libvirt-3-format",
+          "name": "b"
+        }
+      ]
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-3-format",
+      "name": "b"
+    }
+  }
+]

tests/qemublocktestdata/checkpointdelete/snapshots-intermediate2-out.json

+[
+  {
+    "type": "block-dirty-bitmap-add",
+    "data": {
+      "node": "libvirt-2-format",
+      "name": "b",
+      "persistent": true,
+      "disabled": true,
+      "granularity": 65536
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-merge",
+    "data": {
+      "node": "libvirt-2-format",
+      "target": "b",
+      "bitmaps": [
+        {
+          "node": "libvirt-2-format",
+          "name": "c"
+        }
+      ]
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-2-format",
+      "name": "c"
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-enable",
+    "data": {
+      "node": "libvirt-3-format",
+      "name": "b"
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-merge",
+    "data": {
+      "node": "libvirt-3-format",
+      "target": "b",
+      "bitmaps": [
+        {
+          "node": "libvirt-3-format",
+          "name": "c"
+        }
+      ]
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-3-format",
+      "name": "c"
+    }
+  }
+]

tests/qemublocktestdata/checkpointdelete/snapshots-intermediate3-out.json

+[
+  {
+    "type": "block-dirty-bitmap-add",
+    "data": {
+      "node": "libvirt-1-format",
+      "name": "c",
+      "persistent": true,
+      "disabled": true,
+      "granularity": 65536
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-merge",
+    "data": {
+      "node": "libvirt-1-format",
+      "target": "c",
+      "bitmaps": [
+        {
+          "node": "libvirt-1-format",
+          "name": "d"
+        }
+      ]
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-1-format",
+      "name": "d"
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-enable",
+    "data": {
+      "node": "libvirt-2-format",
+      "name": "c"
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-merge",
+    "data": {
+      "node": "libvirt-2-format",
+      "target": "c",
+      "bitmaps": [
+        {
+          "node": "libvirt-2-format",
+          "name": "d"
+        }
+      ]
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-2-format",
+      "name": "d"
+    }
+  }
+]

tests/qemublocktestdata/checkpointdelete/snapshots-noparent-out.json

+[
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-3-format",
+      "name": "a"
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-4-format",
+      "name": "a"
+    }
+  },
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-5-format",
+      "name": "a"
+    }
+  }
+]