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qapi: Implement deprecated-input=reject for QMP commands

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

    {"execute": "query-cpus"}

fails like this

    {"error": {"class": "CommandNotFound", "desc": "Deprecated command query-cpus disabled by policy"}}

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

    {"error": {"class": "CommandNotFound", "desc": "The command query-cpus has not been found"}}

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210318155519.1224118-10-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2021-03-18 16:55:17 +01:00
parent 130d482422
commit d2032598c4
4 changed files with 45 additions and 3 deletions
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13
qapi/qmp-dispatch.c
View file

@ -167,6 +167,19 @@ QDict *qmp_dispatch(const QmpCommandList *cmds, QObject *request,
"The command %s has not been found", command);
goto out;
}
if (cmd->options & QCO_DEPRECATED) {
switch (compat_policy.deprecated_input) {
case COMPAT_POLICY_INPUT_ACCEPT:
break;
case COMPAT_POLICY_INPUT_REJECT:
error_set(&err, ERROR_CLASS_COMMAND_NOT_FOUND,
"Deprecated command %s disabled by policy",
command);
goto out;
default:
abort();
}
}
if (!cmd->enabled) {
error_set(&err, ERROR_CLASS_COMMAND_NOT_FOUND,
"Command %s has been disabled%s%s",