[PATCH v3 27/30] hmp: QAPIfy object_add

[Kevin Wolf <kwolf@xxxxxxxxxx>]

This switches the HMP command object_add from a QemuOpts-based parser to
user_creatable_add_from_str() which uses a keyval parser and enforces
the QAPI schema.

Apart from being a cleanup, this makes non-scalar properties and help
accessible. In order for help to be printed to the monitor instead of
stdout, the printf() calls in the help functions are changed to
qemu_printf().

Signed-off-by: Kevin Wolf <kwolf@xxxxxxxxxx>
Acked-by: Peter Krempa <pkrempa@xxxxxxxxxx>
Reviewed-by: Eric Blake <eblake@xxxxxxxxxx>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@xxxxxxxxxx>
---
 monitor/hmp-cmds.c      | 17 ++---------------
 qom/object_interfaces.c | 11 ++++++-----
 hmp-commands.hx         |  2 +-
 3 files changed, 9 insertions(+), 21 deletions(-)

diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index 3c88a4faef..652cf9ff21 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -1670,24 +1670,11 @@ void hmp_netdev_del(Monitor *mon, const QDict *qdict)
 
 void hmp_object_add(Monitor *mon, const QDict *qdict)
 {
+    const char *options = qdict_get_str(qdict, "object");
     Error *err = NULL;
-    QemuOpts *opts;
-    Object *obj = NULL;
-
-    opts = qemu_opts_from_qdict(qemu_find_opts("object"), qdict, &err);
-    if (err) {
-        goto end;
-    }
 
-    obj = user_creatable_add_opts(opts, &err);
-    qemu_opts_del(opts);
-
-end:
+    user_creatable_add_from_str(options, &err);
     hmp_handle_error(mon, err);
-
-    if (obj) {
-        object_unref(obj);
-    }
 }
 
 void hmp_getfd(Monitor *mon, const QDict *qdict)
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
index bf9f8cd2c6..6dcab60f09 100644
--- a/qom/object_interfaces.c
+++ b/qom/object_interfaces.c
@@ -14,6 +14,7 @@
 #include "qemu/id.h"
 #include "qemu/module.h"
 #include "qemu/option.h"
+#include "qemu/qemu-print.h"
 #include "qapi/opts-visitor.h"
 #include "qemu/config-file.h"
 
@@ -221,11 +222,11 @@ static void user_creatable_print_types(void)
 {
     GSList *l, *list;
 
-    printf("List of user creatable objects:\n");
+    qemu_printf("List of user creatable objects:\n");
     list = object_class_get_list_sorted(TYPE_USER_CREATABLE, false);
     for (l = list; l != NULL; l = l->next) {
         ObjectClass *oc = OBJECT_CLASS(l->data);
-        printf("  %s\n", object_class_get_name(oc));
+        qemu_printf("  %s\n", object_class_get_name(oc));
     }
     g_slist_free(list);
 }
@@ -256,12 +257,12 @@ static bool user_creatable_print_type_properites(const char *type)
     }
     g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
     if (array->len > 0) {
-        printf("%s options:\n", type);
+        qemu_printf("%s options:\n", type);
     } else {
-        printf("There are no options for %s.\n", type);
+        qemu_printf("There are no options for %s.\n", type);
     }
     for (i = 0; i < array->len; i++) {
-        printf("%s\n", (char *)array->pdata[i]);
+        qemu_printf("%s\n", (char *)array->pdata[i]);
     }
     g_ptr_array_set_free_func(array, g_free);
     g_ptr_array_free(array, true);
diff --git a/hmp-commands.hx b/hmp-commands.hx
index d4001f9c5d..6f5d9ce2fb 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1337,7 +1337,7 @@ ERST
 
     {
         .name       = "object_add",
-        .args_type  = "object:O",
+        .args_type  = "object:S",
         .params     = "[qom-type=]type,id=str[,prop=value][,...]",
         .help       = "create QOM object",
         .cmd        = hmp_object_add,
-- 
2.29.2