[PATCH 3/4] qom: Add user_creatable_print_help_from_qdict()

[Kevin Wolf <kwolf@redhat.com>]

This adds a function that, given a QDict of non-help options, prints
help for user creatable objects.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 include/qom/object_interfaces.h | 9 +++++++++
 qom/object_interfaces.c         | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h
index f118fb516b..53b114b11a 100644
--- a/include/qom/object_interfaces.h
+++ b/include/qom/object_interfaces.h
@@ -161,6 +161,15 @@ int user_creatable_add_opts_foreach(void *opaque,
  */
 bool user_creatable_print_help(const char *type, QemuOpts *opts);
 
+/**
+ * user_creatable_print_help_from_qdict:
+ * @args: options to create
+ *
+ * Prints help considering the other options given in @args (if "qom-type" is
+ * given and valid, print properties for the type, otherwise print valid types)
+ */
+void user_creatable_print_help_from_qdict(QDict *args);
+
 /**
  * user_creatable_del:
  * @id: the unique ID for the object
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
index 3fd1da157e..ed896fe764 100644
--- a/qom/object_interfaces.c
+++ b/qom/object_interfaces.c
@@ -279,6 +279,15 @@ bool user_creatable_print_help(const char *type, QemuOpts *opts)
     return false;
 }
 
+void user_creatable_print_help_from_qdict(QDict *args)
+{
+    const char *type = qdict_get_try_str(args, "qom-type");
+
+    if (!type || !user_creatable_print_type_properites(type)) {
+        user_creatable_print_types();
+    }
+}
+
 bool user_creatable_del(const char *id, Error **errp)
 {
     Object *container;
-- 
2.25.4