qemu/qom/qom-qmp-cmds.c

/*
 * QMP commands related to QOM
 *
 * Copyright IBM, Corp. 2011
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 * Contributions after 2012-01-13 are licensed under the terms of the
 * GNU GPL, version 2 or (at your option) any later version.
 */

#include "qemu/osdep.h"
#include "block/qdict.h"
#include "hw/qdev-core.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-qdev.h"
#include "qapi/qapi-commands-qom.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qobject-input-visitor.h"
#include "qemu/cutils.h"
#include "qom/object_interfaces.h"
#include "qom/qom-qobject.h"

ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
{
    Object *obj;
    bool ambiguous = false;
    ObjectPropertyInfoList *props = NULL;
    ObjectProperty *prop;
    ObjectPropertyIterator iter;

    obj = object_resolve_path(path, &ambiguous);
    if (obj == NULL) {
        if (ambiguous) {
            error_setg(errp, "Path '%s' is ambiguous", path);
        } else {
            error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
                      "Device '%s' not found", path);
        }
        return NULL;
    }

    object_property_iter_init(&iter, obj);
    while ((prop = object_property_iter_next(&iter))) {
        ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));

        entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
        entry->next = props;
        props = entry;

        entry->value->name = g_strdup(prop->name);
        entry->value->type = g_strdup(prop->type);
    }

    return props;
}

void qmp_qom_set(const char *path, const char *property, QObject *value,
                 Error **errp)
{
    Object *obj;

    obj = object_resolve_path(path, NULL);
    if (!obj) {
        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
                  "Device '%s' not found", path);
        return;
    }

    object_property_set_qobject(obj, value, property, errp);
}

QObject *qmp_qom_get(const char *path, const char *property, Error **errp)
{
    Object *obj;

    obj = object_resolve_path(path, NULL);
    if (!obj) {
        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
                  "Device '%s' not found", path);
        return NULL;
    }

    return object_property_get_qobject(obj, property, errp);
}

static void qom_list_types_tramp(ObjectClass *klass, void *data)
{
    ObjectTypeInfoList *e, **pret = data;
    ObjectTypeInfo *info;
    ObjectClass *parent = object_class_get_parent(klass);

    info = g_malloc0(sizeof(*info));
    info->name = g_strdup(object_class_get_name(klass));
    info->has_abstract = info->abstract = object_class_is_abstract(klass);
    if (parent) {
        info->has_parent = true;
        info->parent = g_strdup(object_class_get_name(parent));
    }

    e = g_malloc0(sizeof(*e));
    e->value = info;
    e->next = *pret;
    *pret = e;
}

ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
                                       const char *implements,
                                       bool has_abstract,
                                       bool abstract,
                                       Error **errp)
{
    ObjectTypeInfoList *ret = NULL;

    object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);

    return ret;
}

ObjectPropertyInfoList *qmp_device_list_properties(const char *typename,
                                                Error **errp)
{
    ObjectClass *klass;
    Object *obj;
    ObjectProperty *prop;
    ObjectPropertyIterator iter;
    ObjectPropertyInfoList *prop_list = NULL;

    klass = object_class_by_name(typename);
    if (klass == NULL) {
        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
                  "Device '%s' not found", typename);
        return NULL;
    }

    klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
    if (klass == NULL) {
        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "typename", TYPE_DEVICE);
        return NULL;
    }

    if (object_class_is_abstract(klass)) {
        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "typename",
                   "non-abstract device type");
        return NULL;
    }

    obj = object_new(typename);

    object_property_iter_init(&iter, obj);
    while ((prop = object_property_iter_next(&iter))) {
        ObjectPropertyInfo *info;
        ObjectPropertyInfoList *entry;

        /* Skip Object and DeviceState properties */
        if (strcmp(prop->name, "type") == 0 ||
            strcmp(prop->name, "realized") == 0 ||
            strcmp(prop->name, "hotpluggable") == 0 ||
            strcmp(prop->name, "hotplugged") == 0 ||
            strcmp(prop->name, "parent_bus") == 0) {
            continue;
        }

        /* Skip legacy properties since they are just string versions of
         * properties that we already list.
         */
        if (strstart(prop->name, "legacy-", NULL)) {
            continue;
        }

        info = g_new0(ObjectPropertyInfo, 1);
        info->name = g_strdup(prop->name);
        info->type = g_strdup(prop->type);
        info->has_description = !!prop->description;
        info->description = g_strdup(prop->description);
        info->default_value = qobject_ref(prop->defval);
        info->has_default_value = !!info->default_value;

        entry = g_malloc0(sizeof(*entry));
        entry->value = info;
        entry->next = prop_list;
        prop_list = entry;
    }

    object_unref(obj);

    return prop_list;
}

ObjectPropertyInfoList *qmp_qom_list_properties(const char *typename,
                                             Error **errp)
{
    ObjectClass *klass;
    Object *obj = NULL;
    ObjectProperty *prop;
    ObjectPropertyIterator iter;
    ObjectPropertyInfoList *prop_list = NULL;

    klass = object_class_by_name(typename);
    if (klass == NULL) {
        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
                  "Class '%s' not found", typename);
        return NULL;
    }

    klass = object_class_dynamic_cast(klass, TYPE_OBJECT);
    if (klass == NULL) {
        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "typename", TYPE_OBJECT);
        return NULL;
    }

    if (object_class_is_abstract(klass)) {
        object_class_property_iter_init(&iter, klass);
    } else {
        obj = object_new(typename);
        object_property_iter_init(&iter, obj);
    }
    while ((prop = object_property_iter_next(&iter))) {
        ObjectPropertyInfo *info;
        ObjectPropertyInfoList *entry;

        info = g_malloc0(sizeof(*info));
        info->name = g_strdup(prop->name);
        info->type = g_strdup(prop->type);
        info->has_description = !!prop->description;
        info->description = g_strdup(prop->description);

        entry = g_malloc0(sizeof(*entry));
        entry->value = info;
        entry->next = prop_list;
        prop_list = entry;
    }

    object_unref(obj);

    return prop_list;
}

void qmp_object_add(QDict *qdict, QObject **ret_data, Error **errp)
{
    QObject *props;
    QDict *pdict;
    Visitor *v;
    Object *obj;
    g_autofree char *type = NULL;
    g_autofree char *id = NULL;

    type = g_strdup(qdict_get_try_str(qdict, "qom-type"));
    if (!type) {
        error_setg(errp, QERR_MISSING_PARAMETER, "qom-type");
        return;
    }
    qdict_del(qdict, "qom-type");

    id = g_strdup(qdict_get_try_str(qdict, "id"));
    if (!id) {
        error_setg(errp, QERR_MISSING_PARAMETER, "id");
        return;
    }
    qdict_del(qdict, "id");

    props = qdict_get(qdict, "props");
    if (props) {
        pdict = qobject_to(QDict, props);
        if (!pdict) {
            error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
            return;
        }
        qobject_ref(pdict);
        qdict_del(qdict, "props");
        qdict_join(qdict, pdict, false);
        if (qdict_size(pdict) != 0) {
            error_setg(errp, "Option in 'props' conflicts with top level");
            qobject_unref(pdict);
            return;
        }
        qobject_unref(pdict);
    }

    v = qobject_input_visitor_new(QOBJECT(qdict));
    obj = user_creatable_add_type(type, id, qdict, v, errp);
    visit_free(v);
    if (obj) {
        object_unref(obj);
    }
    *ret_data = QOBJECT(qdict_new());
}

void qmp_object_del(const char *id, Error **errp)
{
    user_creatable_del(id, errp);
}