[PATCH 18/20] python/aqmp: add _raw() execution interface

[John Snow <jsnow@redhat.com>]

This is added in anticipation of wanting it for a synchronous wrapper
for the iotest interface. Normally, execute() and execute_msg() both
raise QMP errors in the form of Python exceptions.

Many iotests expect the entire reply as-is. To reduce churn there, add a
private execution interface that will ease transition churn. However, I
do not wish to encourage its use, so it will remain a private interface.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 python/qemu/aqmp/qmp_protocol.py | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/python/qemu/aqmp/qmp_protocol.py b/python/qemu/aqmp/qmp_protocol.py
index 3c16cdc213..36baef9fb3 100644
--- a/python/qemu/aqmp/qmp_protocol.py
+++ b/python/qemu/aqmp/qmp_protocol.py
@@ -454,6 +454,31 @@ async def _execute(self, msg: Message, assign_id: bool = True) -> Message:
         exec_id = await self._issue(msg)
         return await self._reply(exec_id)
 
+    @upper_half
+    @require(Runstate.RUNNING)
+    async def _raw(
+            self,
+            msg: Union[Message, Mapping[str, object], bytes]
+    ) -> Message:
+        """
+        Issue a fairly raw `Message` to the QMP server and await a reply.
+
+        An AQMP execution ID will be assigned, so it isn't *truly* raw.
+
+        :param msg:
+            A Message to send to the server. It may be a `Message`, any
+            Mapping (including Dict), or raw bytes.
+
+        :return: Execution reply from the server.
+        :raise ExecInterruptedError:
+            When the reply could not be retrieved because the connection
+            was lost, or some other problem.
+        """
+        # 1. convert generic Mapping or bytes to a QMP Message
+        # 2. copy Message objects so that we assign an ID only to the copy.
+        msg = Message(msg)
+        return await self._execute(msg)
+
     @upper_half
     @require(Runstate.RUNNING)
     async def execute_msg(self, msg: Message) -> object:
-- 
2.31.1