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qapi: Implement deprecated-input=reject for QMP command arguments

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This policy rejects deprecated input, and thus permits "testing the
future".  Implement it for QMP command arguments: reject commands with
deprecated ones.  Example: when QEMU is run with -compat
deprecated-input=reject, then

    {"execute": "eject", "arguments": {"device": "cd"}}

fails like this

    {"error": {"class": "GenericError", "desc": "Deprecated parameter 'device' disabled by policy"}}

When the deprecated parameter is removed, the error will change to

    {"error": {"class": "GenericError", "desc": "Parameter 'device' is unexpected"}}

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210318155519.1224118-11-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2021-03-18 16:55:18 +01:00
parent d2032598c4
commit db29164103
11 changed files with 101 additions and 2 deletions
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9
qapi/qmp-dispatch.c
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@ -19,6 +19,7 @@
#include "qapi/qmp/dispatch.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qobject-input-visitor.h"
#include "qapi/qobject-output-visitor.h"
#include "sysemu/runstate.h"
#include "qapi/qmp/qbool.h"
@ -27,6 +28,14 @@
CompatPolicy compat_policy;
Visitor *qobject_input_visitor_new_qmp(QObject *obj)
{
Visitor *v = qobject_input_visitor_new(obj);
qobject_input_visitor_set_policy(v, compat_policy.deprecated_input);
return v;
}
Visitor *qobject_output_visitor_new_qmp(QObject **result)
{
Visitor *v = qobject_output_visitor_new(result);