qom: Move HMP command handlers to qom/

Move the HMP command handlers related to QOM handlers from
monitor/hmp-cmds.c and qdev-monitor.c to new qom/qom-hmp-cmds.c, where
they are covered by MAINTAINERS section QOM.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Daniel P. Berrange" <berrange@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190619201050.19040-7-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
[Also move hmp_info_qom_tree(), tweak commit message accordingly]

qom/qom-hmp-cmds.c

@@ -0,0 +1,120 @@
+/*
+ * HMP commands related to QOM
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later.  See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/qdev-core.h"
+#include "monitor/hmp.h"
+#include "monitor/monitor.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-qom.h"
+#include "qapi/qmp/qdict.h"
+#include "qom/object.h"
+
+void hmp_qom_list(Monitor *mon, const QDict *qdict)
+{
+    const char *path = qdict_get_try_str(qdict, "path");
+    ObjectPropertyInfoList *list;
+    Error *err = NULL;
+
+    if (path == NULL) {
+        monitor_printf(mon, "/\n");
+        return;
+    }
+
+    list = qmp_qom_list(path, &err);
+    if (err == NULL) {
+        ObjectPropertyInfoList *start = list;
+        while (list != NULL) {
+            ObjectPropertyInfo *value = list->value;
+
+            monitor_printf(mon, "%s (%s)\n",
+                           value->name, value->type);
+            list = list->next;
+        }
+        qapi_free_ObjectPropertyInfoList(start);
+    }
+    hmp_handle_error(mon, &err);
+}
+
+void hmp_qom_set(Monitor *mon, const QDict *qdict)
+{
+    const char *path = qdict_get_str(qdict, "path");
+    const char *property = qdict_get_str(qdict, "property");
+    const char *value = qdict_get_str(qdict, "value");
+    Error *err = NULL;
+    bool ambiguous = false;
+    Object *obj;
+
+    obj = object_resolve_path(path, &ambiguous);
+    if (obj == NULL) {
+        error_set(&err, ERROR_CLASS_DEVICE_NOT_FOUND,
+                  "Device '%s' not found", path);
+    } else {
+        if (ambiguous) {
+            monitor_printf(mon, "Warning: Path '%s' is ambiguous\n", path);
+        }
+        object_property_parse(obj, value, property, &err);
+    }
+    hmp_handle_error(mon, &err);
+}
+
+typedef struct QOMCompositionState {
+    Monitor *mon;
+    int indent;
+} QOMCompositionState;
+
+static void print_qom_composition(Monitor *mon, Object *obj, int indent);
+
+static int print_qom_composition_child(Object *obj, void *opaque)
+{
+    QOMCompositionState *s = opaque;
+
+    print_qom_composition(s->mon, obj, s->indent);
+
+    return 0;
+}
+
+static void print_qom_composition(Monitor *mon, Object *obj, int indent)
+{
+    QOMCompositionState s = {
+        .mon = mon,
+        .indent = indent + 2,
+    };
+    char *name;
+
+    if (obj == object_get_root()) {
+        name = g_strdup("");
+    } else {
+        name = object_get_canonical_path_component(obj);
+    }
+    monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
+                   object_get_typename(obj));
+    g_free(name);
+    object_child_foreach(obj, print_qom_composition_child, &s);
+}
+
+void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
+{
+    const char *path = qdict_get_try_str(dict, "path");
+    Object *obj;
+    bool ambiguous = false;
+
+    if (path) {
+        obj = object_resolve_path(path, &ambiguous);
+        if (!obj) {
+            monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
+            return;
+        }
+        if (ambiguous) {
+            monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
+            return;
+        }
+    } else {
+        obj = qdev_get_machine();
+    }
+    print_qom_composition(mon, obj, 0);
+}