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authorMarkus Armbruster <armbru@redhat.com>2021-03-18 16:55:11 +0100
committerMarkus Armbruster <armbru@redhat.com>2021-03-19 15:43:33 +0100
commit91fa93e516d080d440ead2ad4f88960545bd5b2c (patch)
treee37234fb14c3cd0f5822b5e8355205ed0c3ccbd0 /qapi
parent6dd75472d58d3d199eb5003a8d2ec2334c68f18f (diff)
downloadqemu-arm-91fa93e516d080d440ead2ad4f88960545bd5b2c.tar.gz
qapi: Implement deprecated-output=hide for QMP command results
This policy suppresses deprecated bits in output, and thus permits "testing the future". Implement it for QMP command results. Example: when QEMU is run with -compat deprecated-output=hide, then {"execute": "query-cpus-fast"} yields {"return": [{"thread-id": 9805, "props": {"core-id": 0, "thread-id": 0, "socket-id": 0}, "qom-path": "/machine/unattached/device[0]", "cpu-index": 0, "target": "x86_64"}]} instead of {"return": [{"arch": "x86", "thread-id": 22436, "props": {"core-id": 0, "thread-id": 0, "socket-id": 0}, "qom-path": "/machine/unattached/device[0]", "cpu-index": 0, "target": "x86_64"}]} Note the suppression of deprecated member "arch". Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210318155519.1224118-4-armbru@redhat.com>
Diffstat (limited to 'qapi')
-rw-r--r--qapi/qapi-visit-core.c9
-rw-r--r--qapi/qmp-dispatch.c9
-rw-r--r--qapi/qobject-output-visitor.c19
-rw-r--r--qapi/trace-events1
4 files changed, 38 insertions, 0 deletions
diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
index 7e5f40e7f0..d9726ecaa1 100644
--- a/qapi/qapi-visit-core.c
+++ b/qapi/qapi-visit-core.c
@@ -135,6 +135,15 @@ bool visit_optional(Visitor *v, const char *name, bool *present)
return *present;
}
+bool visit_deprecated(Visitor *v, const char *name)
+{
+ trace_visit_deprecated(v, name);
+ if (v->deprecated) {
+ return v->deprecated(v, name);
+ }
+ return true;
+}
+
bool visit_is_input(Visitor *v)
{
return v->type == VISITOR_INPUT;
diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c
index f6a65f502d..f79db89b60 100644
--- a/qapi/qmp-dispatch.c
+++ b/qapi/qmp-dispatch.c
@@ -19,6 +19,7 @@
#include "qapi/qmp/dispatch.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qjson.h"
+#include "qapi/qobject-output-visitor.h"
#include "sysemu/runstate.h"
#include "qapi/qmp/qbool.h"
#include "qemu/coroutine.h"
@@ -26,6 +27,14 @@
CompatPolicy compat_policy;
+Visitor *qobject_output_visitor_new_qmp(QObject **result)
+{
+ Visitor *v = qobject_output_visitor_new(result);
+
+ qobject_output_visitor_set_policy(v, compat_policy.deprecated_output);
+ return v;
+}
+
static QDict *qmp_dispatch_check_obj(QDict *dict, bool allow_oob,
Error **errp)
{
diff --git a/qapi/qobject-output-visitor.c b/qapi/qobject-output-visitor.c
index ba6f6ac8a7..e4873308d4 100644
--- a/qapi/qobject-output-visitor.c
+++ b/qapi/qobject-output-visitor.c
@@ -13,6 +13,7 @@
*/
#include "qemu/osdep.h"
+#include "qapi/compat-policy.h"
#include "qapi/qobject-output-visitor.h"
#include "qapi/visitor-impl.h"
#include "qemu/queue.h"
@@ -31,6 +32,8 @@ typedef struct QStackEntry {
struct QObjectOutputVisitor {
Visitor visitor;
+ CompatPolicyOutput deprecated_policy;
+
QSLIST_HEAD(, QStackEntry) stack; /* Stack of unfinished containers */
QObject *root; /* Root of the output visit */
QObject **result; /* User's storage location for result */
@@ -207,6 +210,13 @@ static bool qobject_output_type_null(Visitor *v, const char *name,
return true;
}
+static bool qobject_output_deprecated(Visitor *v, const char *name)
+{
+ QObjectOutputVisitor *qov = to_qov(v);
+
+ return qov->deprecated_policy != COMPAT_POLICY_OUTPUT_HIDE;
+}
+
/* Finish building, and return the root object.
* The root object is never null. The caller becomes the object's
* owner, and should use qobject_unref() when done with it. */
@@ -256,6 +266,7 @@ Visitor *qobject_output_visitor_new(QObject **result)
v->visitor.type_number = qobject_output_type_number;
v->visitor.type_any = qobject_output_type_any;
v->visitor.type_null = qobject_output_type_null;
+ v->visitor.deprecated = qobject_output_deprecated;
v->visitor.complete = qobject_output_complete;
v->visitor.free = qobject_output_free;
@@ -264,3 +275,11 @@ Visitor *qobject_output_visitor_new(QObject **result)
return &v->visitor;
}
+
+void qobject_output_visitor_set_policy(Visitor *v,
+ CompatPolicyOutput deprecated)
+{
+ QObjectOutputVisitor *qov = to_qov(v);
+
+ qov->deprecated_policy = deprecated;
+}
diff --git a/qapi/trace-events b/qapi/trace-events
index 5eb4afa110..eff1fbd199 100644
--- a/qapi/trace-events
+++ b/qapi/trace-events
@@ -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(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"
visit_type_int(void *v, const char *name, int64_t *obj) "v=%p name=%s obj=%p"