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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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qapi/trace-events
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@ -17,6 +17,7 @@ visit_start_alternate(void *v, const char *name, void *obj, size_t size) "v=%p n
visit_end_alternate(void *v, void *obj) "v=%p obj=%p"
visit_optional(void *v, const char *name, bool *present) "v=%p name=%s present=%p"
visit_deprecated_accept(void *v, const char *name) "v=%p name=%s"
visit_deprecated(void *v, const char *name) "v=%p name=%s"
visit_type_enum(void *v, const char *name, int *obj) "v=%p name=%s obj=%p"