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 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 <arm...@redhat.com>
---
include/qapi/qmp/dispatch.h | 1 +
qapi/qmp-dispatch.c | 13 +++++++++++++
tests/test-qmp-cmds.c | 24 ++++++++++++++++++++++++
scripts/qapi/commands.py | 10 +++++++---
4 files changed, 45 insertions(+), 3 deletions(-)
diff --git a/include/qapi/qmp/dispatch.h b/include/qapi/qmp/dispatch.h
index 9aa426a398..ef256f2bb7 100644
--- a/include/qapi/qmp/dispatch.h
+++ b/include/qapi/qmp/dispatch.h
@@ -24,6 +24,7 @@ typedef enum QmpCommandOptions
QCO_NO_SUCCESS_RESP = (1U << 0),
QCO_ALLOW_OOB = (1U << 1),
QCO_ALLOW_PRECONFIG = (1U << 2),
+ QCO_DEPRECATED = (1U << 3),
} QmpCommandOptions;
typedef struct QmpCommand
diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c
index 57d823c8e1..18d62cd83b 100644
--- a/qapi/qmp-dispatch.c
+++ b/qapi/qmp-dispatch.c
@@ -130,6 +130,19 @@ QDict *qmp_dispatch(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,
"The command %s has been disabled for this instance",
diff --git a/tests/test-qmp-cmds.c b/tests/test-qmp-cmds.c
index 82d599630c..a2099fee7d 100644
--- a/tests/test-qmp-cmds.c
+++ b/tests/test-qmp-cmds.c
@@ -277,6 +277,28 @@ static void test_dispatch_cmd_io(void)
qobject_unref(ret3);
}
+static void test_dispatch_cmd_deprecated(void)
+{
+ const char *cmd = "{ 'execute': 'test-command-features1' }";
+ QDict *ret;
+
+ memset(&compat_policy, 0, sizeof(compat_policy));
+
+ /* accept */
+ ret = qobject_to(QDict, do_qmp_dispatch(false, cmd));
+ assert(ret && qdict_size(ret) == 0);
+ qobject_unref(ret);
+
+ compat_policy.has_deprecated_input = true;
+ compat_policy.deprecated_input = COMPAT_POLICY_INPUT_ACCEPT;
+ ret = qobject_to(QDict, do_qmp_dispatch(false, cmd));
+ assert(ret && qdict_size(ret) == 0);
+ qobject_unref(ret);
+
+ compat_policy.deprecated_input = COMPAT_POLICY_INPUT_REJECT;
+ do_qmp_dispatch_error(false, ERROR_CLASS_COMMAND_NOT_FOUND, cmd);
+}
+
static void test_dispatch_cmd_ret_deprecated(void)
{
const char *cmd = "{ 'execute': 'test-features0' }";
@@ -375,6 +397,8 @@ int main(int argc, char **argv)
g_test_add_func("/qmp/dispatch_cmd_io", test_dispatch_cmd_io);
g_test_add_func("/qmp/dispatch_cmd_success_response",
test_dispatch_cmd_success_response);
+ g_test_add_func("/qmp/dispatch_cmd_deprecated",
+ test_dispatch_cmd_deprecated);
g_test_add_func("/qmp/dispatch_cmd_ret_deprecated",
test_dispatch_cmd_ret_deprecated);
g_test_add_func("/qmp/dealloc_types", test_dealloc_types);
diff --git a/scripts/qapi/commands.py b/scripts/qapi/commands.py
index 35b79c554d..f628bbf144 100644
--- a/scripts/qapi/commands.py
+++ b/scripts/qapi/commands.py
@@ -194,9 +194,13 @@ out:
return ret
-def gen_register_command(name, success_response, allow_oob, allow_preconfig):
+def gen_register_command(name, features,
+ success_response, allow_oob, allow_preconfig):
options = []
+ if 'deprecated' in [f.name for f in features]:
+ options += ['QCO_DEPRECATED']
+
if not success_response:
options += ['QCO_NO_SUCCESS_RESP']
if allow_oob:
@@ -302,8 +306,8 @@ void %(c_prefix)sqmp_init_marshal(QmpCommandList *cmds);
self._genh.add(gen_command_decl(name, arg_type, boxed, ret_type))
self._genh.add(gen_marshal_decl(name))
self._genc.add(gen_marshal(name, arg_type, boxed, ret_type))
- self._regy.add(gen_register_command(name, success_response,
- allow_oob, allow_preconfig))
+ self._regy.add(gen_register_command(
+ name, features, success_response, allow_oob, allow_preconfig))
def gen_commands(schema, output_dir, prefix):
--
2.21.1
