5b9237f67c
This catches objects initializing beyond allocated memory, e.g., when subtypes get extended with instance state of their own. Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Andreas Färber <afaerber@suse.de>
1372 lines
33 KiB
C
1372 lines
33 KiB
C
/*
|
|
* QEMU Object Model
|
|
*
|
|
* Copyright IBM, Corp. 2011
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
*
|
|
* 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 "qom/object.h"
|
|
#include "qemu-common.h"
|
|
#include "qapi/visitor.h"
|
|
#include "qapi/string-input-visitor.h"
|
|
#include "qapi/string-output-visitor.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
#include "trace.h"
|
|
|
|
/* TODO: replace QObject with a simpler visitor to avoid a dependency
|
|
* of the QOM core on QObject? */
|
|
#include "qom/qom-qobject.h"
|
|
#include "qapi/qmp/qobject.h"
|
|
#include "qapi/qmp/qbool.h"
|
|
#include "qapi/qmp/qint.h"
|
|
#include "qapi/qmp/qstring.h"
|
|
|
|
#define MAX_INTERFACES 32
|
|
|
|
typedef struct InterfaceImpl InterfaceImpl;
|
|
typedef struct TypeImpl TypeImpl;
|
|
|
|
struct InterfaceImpl
|
|
{
|
|
const char *typename;
|
|
};
|
|
|
|
struct TypeImpl
|
|
{
|
|
const char *name;
|
|
|
|
size_t class_size;
|
|
|
|
size_t instance_size;
|
|
|
|
void (*class_init)(ObjectClass *klass, void *data);
|
|
void (*class_base_init)(ObjectClass *klass, void *data);
|
|
void (*class_finalize)(ObjectClass *klass, void *data);
|
|
|
|
void *class_data;
|
|
|
|
void (*instance_init)(Object *obj);
|
|
void (*instance_post_init)(Object *obj);
|
|
void (*instance_finalize)(Object *obj);
|
|
|
|
bool abstract;
|
|
|
|
const char *parent;
|
|
TypeImpl *parent_type;
|
|
|
|
ObjectClass *class;
|
|
|
|
int num_interfaces;
|
|
InterfaceImpl interfaces[MAX_INTERFACES];
|
|
};
|
|
|
|
static Type type_interface;
|
|
|
|
static GHashTable *type_table_get(void)
|
|
{
|
|
static GHashTable *type_table;
|
|
|
|
if (type_table == NULL) {
|
|
type_table = g_hash_table_new(g_str_hash, g_str_equal);
|
|
}
|
|
|
|
return type_table;
|
|
}
|
|
|
|
static void type_table_add(TypeImpl *ti)
|
|
{
|
|
g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
|
|
}
|
|
|
|
static TypeImpl *type_table_lookup(const char *name)
|
|
{
|
|
return g_hash_table_lookup(type_table_get(), name);
|
|
}
|
|
|
|
static TypeImpl *type_register_internal(const TypeInfo *info)
|
|
{
|
|
TypeImpl *ti = g_malloc0(sizeof(*ti));
|
|
int i;
|
|
|
|
g_assert(info->name != NULL);
|
|
|
|
if (type_table_lookup(info->name) != NULL) {
|
|
fprintf(stderr, "Registering `%s' which already exists\n", info->name);
|
|
abort();
|
|
}
|
|
|
|
ti->name = g_strdup(info->name);
|
|
ti->parent = g_strdup(info->parent);
|
|
|
|
ti->class_size = info->class_size;
|
|
ti->instance_size = info->instance_size;
|
|
|
|
ti->class_init = info->class_init;
|
|
ti->class_base_init = info->class_base_init;
|
|
ti->class_finalize = info->class_finalize;
|
|
ti->class_data = info->class_data;
|
|
|
|
ti->instance_init = info->instance_init;
|
|
ti->instance_post_init = info->instance_post_init;
|
|
ti->instance_finalize = info->instance_finalize;
|
|
|
|
ti->abstract = info->abstract;
|
|
|
|
for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
|
|
ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
|
|
}
|
|
ti->num_interfaces = i;
|
|
|
|
type_table_add(ti);
|
|
|
|
return ti;
|
|
}
|
|
|
|
TypeImpl *type_register(const TypeInfo *info)
|
|
{
|
|
assert(info->parent);
|
|
return type_register_internal(info);
|
|
}
|
|
|
|
TypeImpl *type_register_static(const TypeInfo *info)
|
|
{
|
|
return type_register(info);
|
|
}
|
|
|
|
static TypeImpl *type_get_by_name(const char *name)
|
|
{
|
|
if (name == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
return type_table_lookup(name);
|
|
}
|
|
|
|
static TypeImpl *type_get_parent(TypeImpl *type)
|
|
{
|
|
if (!type->parent_type && type->parent) {
|
|
type->parent_type = type_get_by_name(type->parent);
|
|
g_assert(type->parent_type != NULL);
|
|
}
|
|
|
|
return type->parent_type;
|
|
}
|
|
|
|
static bool type_has_parent(TypeImpl *type)
|
|
{
|
|
return (type->parent != NULL);
|
|
}
|
|
|
|
static size_t type_class_get_size(TypeImpl *ti)
|
|
{
|
|
if (ti->class_size) {
|
|
return ti->class_size;
|
|
}
|
|
|
|
if (type_has_parent(ti)) {
|
|
return type_class_get_size(type_get_parent(ti));
|
|
}
|
|
|
|
return sizeof(ObjectClass);
|
|
}
|
|
|
|
static size_t type_object_get_size(TypeImpl *ti)
|
|
{
|
|
if (ti->instance_size) {
|
|
return ti->instance_size;
|
|
}
|
|
|
|
if (type_has_parent(ti)) {
|
|
return type_object_get_size(type_get_parent(ti));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
|
|
{
|
|
assert(target_type);
|
|
|
|
/* Check if typename is a direct ancestor of type */
|
|
while (type) {
|
|
if (type == target_type) {
|
|
return true;
|
|
}
|
|
|
|
type = type_get_parent(type);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void type_initialize(TypeImpl *ti);
|
|
|
|
static void type_initialize_interface(TypeImpl *ti, const char *parent)
|
|
{
|
|
InterfaceClass *new_iface;
|
|
TypeInfo info = { };
|
|
TypeImpl *iface_impl;
|
|
|
|
info.parent = parent;
|
|
info.name = g_strdup_printf("%s::%s", ti->name, info.parent);
|
|
info.abstract = true;
|
|
|
|
iface_impl = type_register(&info);
|
|
type_initialize(iface_impl);
|
|
g_free((char *)info.name);
|
|
|
|
new_iface = (InterfaceClass *)iface_impl->class;
|
|
new_iface->concrete_class = ti->class;
|
|
|
|
ti->class->interfaces = g_slist_append(ti->class->interfaces,
|
|
iface_impl->class);
|
|
}
|
|
|
|
static void type_initialize(TypeImpl *ti)
|
|
{
|
|
TypeImpl *parent;
|
|
|
|
if (ti->class) {
|
|
return;
|
|
}
|
|
|
|
ti->class_size = type_class_get_size(ti);
|
|
ti->instance_size = type_object_get_size(ti);
|
|
|
|
ti->class = g_malloc0(ti->class_size);
|
|
|
|
parent = type_get_parent(ti);
|
|
if (parent) {
|
|
type_initialize(parent);
|
|
GSList *e;
|
|
int i;
|
|
|
|
g_assert(parent->class_size <= ti->class_size);
|
|
memcpy(ti->class, parent->class, parent->class_size);
|
|
ti->class->interfaces = NULL;
|
|
|
|
for (e = parent->class->interfaces; e; e = e->next) {
|
|
ObjectClass *iface = e->data;
|
|
type_initialize_interface(ti, object_class_get_name(iface));
|
|
}
|
|
|
|
for (i = 0; i < ti->num_interfaces; i++) {
|
|
TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
|
|
for (e = ti->class->interfaces; e; e = e->next) {
|
|
TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
|
|
|
|
if (type_is_ancestor(target_type, t)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (e) {
|
|
continue;
|
|
}
|
|
|
|
type_initialize_interface(ti, ti->interfaces[i].typename);
|
|
}
|
|
}
|
|
|
|
ti->class->type = ti;
|
|
|
|
while (parent) {
|
|
if (parent->class_base_init) {
|
|
parent->class_base_init(ti->class, ti->class_data);
|
|
}
|
|
parent = type_get_parent(parent);
|
|
}
|
|
|
|
if (ti->class_init) {
|
|
ti->class_init(ti->class, ti->class_data);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
static void object_init_with_type(Object *obj, TypeImpl *ti)
|
|
{
|
|
if (type_has_parent(ti)) {
|
|
object_init_with_type(obj, type_get_parent(ti));
|
|
}
|
|
|
|
if (ti->instance_init) {
|
|
ti->instance_init(obj);
|
|
}
|
|
}
|
|
|
|
static void object_post_init_with_type(Object *obj, TypeImpl *ti)
|
|
{
|
|
if (ti->instance_post_init) {
|
|
ti->instance_post_init(obj);
|
|
}
|
|
|
|
if (type_has_parent(ti)) {
|
|
object_post_init_with_type(obj, type_get_parent(ti));
|
|
}
|
|
}
|
|
|
|
void object_initialize_with_type(void *data, size_t size, TypeImpl *type)
|
|
{
|
|
Object *obj = data;
|
|
|
|
g_assert(type != NULL);
|
|
type_initialize(type);
|
|
|
|
g_assert(type->instance_size >= sizeof(Object));
|
|
g_assert(type->abstract == false);
|
|
g_assert(size >= type->instance_size);
|
|
|
|
memset(obj, 0, type->instance_size);
|
|
obj->class = type->class;
|
|
object_ref(obj);
|
|
QTAILQ_INIT(&obj->properties);
|
|
object_init_with_type(obj, type);
|
|
object_post_init_with_type(obj, type);
|
|
}
|
|
|
|
void object_initialize(void *data, size_t size, const char *typename)
|
|
{
|
|
TypeImpl *type = type_get_by_name(typename);
|
|
|
|
object_initialize_with_type(data, size, type);
|
|
}
|
|
|
|
static inline bool object_property_is_child(ObjectProperty *prop)
|
|
{
|
|
return strstart(prop->type, "child<", NULL);
|
|
}
|
|
|
|
static inline bool object_property_is_link(ObjectProperty *prop)
|
|
{
|
|
return strstart(prop->type, "link<", NULL);
|
|
}
|
|
|
|
static void object_property_del_all(Object *obj)
|
|
{
|
|
while (!QTAILQ_EMPTY(&obj->properties)) {
|
|
ObjectProperty *prop = QTAILQ_FIRST(&obj->properties);
|
|
|
|
QTAILQ_REMOVE(&obj->properties, prop, node);
|
|
|
|
if (prop->release) {
|
|
prop->release(obj, prop->name, prop->opaque);
|
|
}
|
|
|
|
g_free(prop->name);
|
|
g_free(prop->type);
|
|
g_free(prop);
|
|
}
|
|
}
|
|
|
|
static void object_property_del_child(Object *obj, Object *child, Error **errp)
|
|
{
|
|
ObjectProperty *prop;
|
|
|
|
QTAILQ_FOREACH(prop, &obj->properties, node) {
|
|
if (object_property_is_child(prop) && prop->opaque == child) {
|
|
object_property_del(obj, prop->name, errp);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void object_unparent(Object *obj)
|
|
{
|
|
if (!obj->parent) {
|
|
return;
|
|
}
|
|
|
|
object_ref(obj);
|
|
if (obj->class->unparent) {
|
|
(obj->class->unparent)(obj);
|
|
}
|
|
if (obj->parent) {
|
|
object_property_del_child(obj->parent, obj, NULL);
|
|
}
|
|
object_unref(obj);
|
|
}
|
|
|
|
static void object_deinit(Object *obj, TypeImpl *type)
|
|
{
|
|
if (type->instance_finalize) {
|
|
type->instance_finalize(obj);
|
|
}
|
|
|
|
if (type_has_parent(type)) {
|
|
object_deinit(obj, type_get_parent(type));
|
|
}
|
|
}
|
|
|
|
static void object_finalize(void *data)
|
|
{
|
|
Object *obj = data;
|
|
TypeImpl *ti = obj->class->type;
|
|
|
|
object_deinit(obj, ti);
|
|
object_property_del_all(obj);
|
|
|
|
g_assert(obj->ref == 0);
|
|
if (obj->free) {
|
|
obj->free(obj);
|
|
}
|
|
}
|
|
|
|
Object *object_new_with_type(Type type)
|
|
{
|
|
Object *obj;
|
|
|
|
g_assert(type != NULL);
|
|
type_initialize(type);
|
|
|
|
obj = g_malloc(type->instance_size);
|
|
object_initialize_with_type(obj, type->instance_size, type);
|
|
obj->free = g_free;
|
|
|
|
return obj;
|
|
}
|
|
|
|
Object *object_new(const char *typename)
|
|
{
|
|
TypeImpl *ti = type_get_by_name(typename);
|
|
|
|
return object_new_with_type(ti);
|
|
}
|
|
|
|
Object *object_dynamic_cast(Object *obj, const char *typename)
|
|
{
|
|
if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
|
|
return obj;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
Object *object_dynamic_cast_assert(Object *obj, const char *typename,
|
|
const char *file, int line, const char *func)
|
|
{
|
|
trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
|
|
typename, file, line, func);
|
|
|
|
#ifdef CONFIG_QOM_CAST_DEBUG
|
|
int i;
|
|
Object *inst;
|
|
|
|
for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
|
|
if (obj->class->cast_cache[i] == typename) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
inst = object_dynamic_cast(obj, typename);
|
|
|
|
if (!inst && obj) {
|
|
fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
|
|
file, line, func, obj, typename);
|
|
abort();
|
|
}
|
|
|
|
assert(obj == inst);
|
|
|
|
if (obj && obj == inst) {
|
|
for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
|
|
obj->class->cast_cache[i - 1] = obj->class->cast_cache[i];
|
|
}
|
|
obj->class->cast_cache[i - 1] = typename;
|
|
}
|
|
|
|
out:
|
|
#endif
|
|
return obj;
|
|
}
|
|
|
|
ObjectClass *object_class_dynamic_cast(ObjectClass *class,
|
|
const char *typename)
|
|
{
|
|
ObjectClass *ret = NULL;
|
|
TypeImpl *target_type;
|
|
TypeImpl *type;
|
|
|
|
if (!class) {
|
|
return NULL;
|
|
}
|
|
|
|
/* A simple fast path that can trigger a lot for leaf classes. */
|
|
type = class->type;
|
|
if (type->name == typename) {
|
|
return class;
|
|
}
|
|
|
|
target_type = type_get_by_name(typename);
|
|
if (!target_type) {
|
|
/* target class type unknown, so fail the cast */
|
|
return NULL;
|
|
}
|
|
|
|
if (type->class->interfaces &&
|
|
type_is_ancestor(target_type, type_interface)) {
|
|
int found = 0;
|
|
GSList *i;
|
|
|
|
for (i = class->interfaces; i; i = i->next) {
|
|
ObjectClass *target_class = i->data;
|
|
|
|
if (type_is_ancestor(target_class->type, target_type)) {
|
|
ret = target_class;
|
|
found++;
|
|
}
|
|
}
|
|
|
|
/* The match was ambiguous, don't allow a cast */
|
|
if (found > 1) {
|
|
ret = NULL;
|
|
}
|
|
} else if (type_is_ancestor(type, target_type)) {
|
|
ret = class;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
|
|
const char *typename,
|
|
const char *file, int line,
|
|
const char *func)
|
|
{
|
|
ObjectClass *ret;
|
|
|
|
trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
|
|
typename, file, line, func);
|
|
|
|
#ifdef CONFIG_QOM_CAST_DEBUG
|
|
int i;
|
|
|
|
for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
|
|
if (class->cast_cache[i] == typename) {
|
|
ret = class;
|
|
goto out;
|
|
}
|
|
}
|
|
#else
|
|
if (!class || !class->interfaces) {
|
|
return class;
|
|
}
|
|
#endif
|
|
|
|
ret = object_class_dynamic_cast(class, typename);
|
|
if (!ret && class) {
|
|
fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
|
|
file, line, func, class, typename);
|
|
abort();
|
|
}
|
|
|
|
#ifdef CONFIG_QOM_CAST_DEBUG
|
|
if (class && ret == class) {
|
|
for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
|
|
class->cast_cache[i - 1] = class->cast_cache[i];
|
|
}
|
|
class->cast_cache[i - 1] = typename;
|
|
}
|
|
out:
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
const char *object_get_typename(Object *obj)
|
|
{
|
|
return obj->class->type->name;
|
|
}
|
|
|
|
ObjectClass *object_get_class(Object *obj)
|
|
{
|
|
return obj->class;
|
|
}
|
|
|
|
bool object_class_is_abstract(ObjectClass *klass)
|
|
{
|
|
return klass->type->abstract;
|
|
}
|
|
|
|
const char *object_class_get_name(ObjectClass *klass)
|
|
{
|
|
return klass->type->name;
|
|
}
|
|
|
|
ObjectClass *object_class_by_name(const char *typename)
|
|
{
|
|
TypeImpl *type = type_get_by_name(typename);
|
|
|
|
if (!type) {
|
|
return NULL;
|
|
}
|
|
|
|
type_initialize(type);
|
|
|
|
return type->class;
|
|
}
|
|
|
|
ObjectClass *object_class_get_parent(ObjectClass *class)
|
|
{
|
|
TypeImpl *type = type_get_parent(class->type);
|
|
|
|
if (!type) {
|
|
return NULL;
|
|
}
|
|
|
|
type_initialize(type);
|
|
|
|
return type->class;
|
|
}
|
|
|
|
typedef struct OCFData
|
|
{
|
|
void (*fn)(ObjectClass *klass, void *opaque);
|
|
const char *implements_type;
|
|
bool include_abstract;
|
|
void *opaque;
|
|
} OCFData;
|
|
|
|
static void object_class_foreach_tramp(gpointer key, gpointer value,
|
|
gpointer opaque)
|
|
{
|
|
OCFData *data = opaque;
|
|
TypeImpl *type = value;
|
|
ObjectClass *k;
|
|
|
|
type_initialize(type);
|
|
k = type->class;
|
|
|
|
if (!data->include_abstract && type->abstract) {
|
|
return;
|
|
}
|
|
|
|
if (data->implements_type &&
|
|
!object_class_dynamic_cast(k, data->implements_type)) {
|
|
return;
|
|
}
|
|
|
|
data->fn(k, data->opaque);
|
|
}
|
|
|
|
void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
|
|
const char *implements_type, bool include_abstract,
|
|
void *opaque)
|
|
{
|
|
OCFData data = { fn, implements_type, include_abstract, opaque };
|
|
|
|
g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
|
|
}
|
|
|
|
int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
|
|
void *opaque)
|
|
{
|
|
ObjectProperty *prop;
|
|
int ret = 0;
|
|
|
|
QTAILQ_FOREACH(prop, &obj->properties, node) {
|
|
if (object_property_is_child(prop)) {
|
|
ret = fn(prop->opaque, opaque);
|
|
if (ret != 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
|
|
{
|
|
GSList **list = opaque;
|
|
|
|
*list = g_slist_prepend(*list, klass);
|
|
}
|
|
|
|
GSList *object_class_get_list(const char *implements_type,
|
|
bool include_abstract)
|
|
{
|
|
GSList *list = NULL;
|
|
|
|
object_class_foreach(object_class_get_list_tramp,
|
|
implements_type, include_abstract, &list);
|
|
return list;
|
|
}
|
|
|
|
void object_ref(Object *obj)
|
|
{
|
|
atomic_inc(&obj->ref);
|
|
}
|
|
|
|
void object_unref(Object *obj)
|
|
{
|
|
g_assert(obj->ref > 0);
|
|
|
|
/* parent always holds a reference to its children */
|
|
if (atomic_fetch_dec(&obj->ref) == 1) {
|
|
object_finalize(obj);
|
|
}
|
|
}
|
|
|
|
void object_property_add(Object *obj, const char *name, const char *type,
|
|
ObjectPropertyAccessor *get,
|
|
ObjectPropertyAccessor *set,
|
|
ObjectPropertyRelease *release,
|
|
void *opaque, Error **errp)
|
|
{
|
|
ObjectProperty *prop;
|
|
|
|
QTAILQ_FOREACH(prop, &obj->properties, node) {
|
|
if (strcmp(prop->name, name) == 0) {
|
|
error_setg(errp, "attempt to add duplicate property '%s'"
|
|
" to object (type '%s')", name,
|
|
object_get_typename(obj));
|
|
return;
|
|
}
|
|
}
|
|
|
|
prop = g_malloc0(sizeof(*prop));
|
|
|
|
prop->name = g_strdup(name);
|
|
prop->type = g_strdup(type);
|
|
|
|
prop->get = get;
|
|
prop->set = set;
|
|
prop->release = release;
|
|
prop->opaque = opaque;
|
|
|
|
QTAILQ_INSERT_TAIL(&obj->properties, prop, node);
|
|
}
|
|
|
|
ObjectProperty *object_property_find(Object *obj, const char *name,
|
|
Error **errp)
|
|
{
|
|
ObjectProperty *prop;
|
|
|
|
QTAILQ_FOREACH(prop, &obj->properties, node) {
|
|
if (strcmp(prop->name, name) == 0) {
|
|
return prop;
|
|
}
|
|
}
|
|
|
|
error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name);
|
|
return NULL;
|
|
}
|
|
|
|
void object_property_del(Object *obj, const char *name, Error **errp)
|
|
{
|
|
ObjectProperty *prop = object_property_find(obj, name, errp);
|
|
if (prop == NULL) {
|
|
return;
|
|
}
|
|
|
|
if (prop->release) {
|
|
prop->release(obj, name, prop->opaque);
|
|
}
|
|
|
|
QTAILQ_REMOVE(&obj->properties, prop, node);
|
|
|
|
g_free(prop->name);
|
|
g_free(prop->type);
|
|
g_free(prop);
|
|
}
|
|
|
|
void object_property_get(Object *obj, Visitor *v, const char *name,
|
|
Error **errp)
|
|
{
|
|
ObjectProperty *prop = object_property_find(obj, name, errp);
|
|
if (prop == NULL) {
|
|
return;
|
|
}
|
|
|
|
if (!prop->get) {
|
|
error_set(errp, QERR_PERMISSION_DENIED);
|
|
} else {
|
|
prop->get(obj, v, prop->opaque, name, errp);
|
|
}
|
|
}
|
|
|
|
void object_property_set(Object *obj, Visitor *v, const char *name,
|
|
Error **errp)
|
|
{
|
|
ObjectProperty *prop = object_property_find(obj, name, errp);
|
|
if (prop == NULL) {
|
|
return;
|
|
}
|
|
|
|
if (!prop->set) {
|
|
error_set(errp, QERR_PERMISSION_DENIED);
|
|
} else {
|
|
prop->set(obj, v, prop->opaque, name, errp);
|
|
}
|
|
}
|
|
|
|
void object_property_set_str(Object *obj, const char *value,
|
|
const char *name, Error **errp)
|
|
{
|
|
QString *qstr = qstring_from_str(value);
|
|
object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
|
|
|
|
QDECREF(qstr);
|
|
}
|
|
|
|
char *object_property_get_str(Object *obj, const char *name,
|
|
Error **errp)
|
|
{
|
|
QObject *ret = object_property_get_qobject(obj, name, errp);
|
|
QString *qstring;
|
|
char *retval;
|
|
|
|
if (!ret) {
|
|
return NULL;
|
|
}
|
|
qstring = qobject_to_qstring(ret);
|
|
if (!qstring) {
|
|
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
|
|
retval = NULL;
|
|
} else {
|
|
retval = g_strdup(qstring_get_str(qstring));
|
|
}
|
|
|
|
QDECREF(qstring);
|
|
return retval;
|
|
}
|
|
|
|
void object_property_set_link(Object *obj, Object *value,
|
|
const char *name, Error **errp)
|
|
{
|
|
object_property_set_str(obj, object_get_canonical_path(value),
|
|
name, errp);
|
|
}
|
|
|
|
Object *object_property_get_link(Object *obj, const char *name,
|
|
Error **errp)
|
|
{
|
|
char *str = object_property_get_str(obj, name, errp);
|
|
Object *target = NULL;
|
|
|
|
if (str && *str) {
|
|
target = object_resolve_path(str, NULL);
|
|
if (!target) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, str);
|
|
}
|
|
}
|
|
|
|
g_free(str);
|
|
return target;
|
|
}
|
|
|
|
void object_property_set_bool(Object *obj, bool value,
|
|
const char *name, Error **errp)
|
|
{
|
|
QBool *qbool = qbool_from_int(value);
|
|
object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
|
|
|
|
QDECREF(qbool);
|
|
}
|
|
|
|
bool object_property_get_bool(Object *obj, const char *name,
|
|
Error **errp)
|
|
{
|
|
QObject *ret = object_property_get_qobject(obj, name, errp);
|
|
QBool *qbool;
|
|
bool retval;
|
|
|
|
if (!ret) {
|
|
return false;
|
|
}
|
|
qbool = qobject_to_qbool(ret);
|
|
if (!qbool) {
|
|
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
|
|
retval = false;
|
|
} else {
|
|
retval = qbool_get_int(qbool);
|
|
}
|
|
|
|
QDECREF(qbool);
|
|
return retval;
|
|
}
|
|
|
|
void object_property_set_int(Object *obj, int64_t value,
|
|
const char *name, Error **errp)
|
|
{
|
|
QInt *qint = qint_from_int(value);
|
|
object_property_set_qobject(obj, QOBJECT(qint), name, errp);
|
|
|
|
QDECREF(qint);
|
|
}
|
|
|
|
int64_t object_property_get_int(Object *obj, const char *name,
|
|
Error **errp)
|
|
{
|
|
QObject *ret = object_property_get_qobject(obj, name, errp);
|
|
QInt *qint;
|
|
int64_t retval;
|
|
|
|
if (!ret) {
|
|
return -1;
|
|
}
|
|
qint = qobject_to_qint(ret);
|
|
if (!qint) {
|
|
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
|
|
retval = -1;
|
|
} else {
|
|
retval = qint_get_int(qint);
|
|
}
|
|
|
|
QDECREF(qint);
|
|
return retval;
|
|
}
|
|
|
|
void object_property_parse(Object *obj, const char *string,
|
|
const char *name, Error **errp)
|
|
{
|
|
StringInputVisitor *mi;
|
|
mi = string_input_visitor_new(string);
|
|
object_property_set(obj, string_input_get_visitor(mi), name, errp);
|
|
|
|
string_input_visitor_cleanup(mi);
|
|
}
|
|
|
|
char *object_property_print(Object *obj, const char *name,
|
|
Error **errp)
|
|
{
|
|
StringOutputVisitor *mo;
|
|
char *string;
|
|
|
|
mo = string_output_visitor_new();
|
|
object_property_get(obj, string_output_get_visitor(mo), name, errp);
|
|
string = string_output_get_string(mo);
|
|
string_output_visitor_cleanup(mo);
|
|
return string;
|
|
}
|
|
|
|
const char *object_property_get_type(Object *obj, const char *name, Error **errp)
|
|
{
|
|
ObjectProperty *prop = object_property_find(obj, name, errp);
|
|
if (prop == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
return prop->type;
|
|
}
|
|
|
|
Object *object_get_root(void)
|
|
{
|
|
static Object *root;
|
|
|
|
if (!root) {
|
|
root = object_new("container");
|
|
}
|
|
|
|
return root;
|
|
}
|
|
|
|
static void object_get_child_property(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
Object *child = opaque;
|
|
gchar *path;
|
|
|
|
path = object_get_canonical_path(child);
|
|
visit_type_str(v, &path, name, errp);
|
|
g_free(path);
|
|
}
|
|
|
|
static void object_finalize_child_property(Object *obj, const char *name,
|
|
void *opaque)
|
|
{
|
|
Object *child = opaque;
|
|
|
|
object_unref(child);
|
|
}
|
|
|
|
void object_property_add_child(Object *obj, const char *name,
|
|
Object *child, Error **errp)
|
|
{
|
|
gchar *type;
|
|
|
|
type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child)));
|
|
|
|
object_property_add(obj, name, type, object_get_child_property,
|
|
NULL, object_finalize_child_property, child, errp);
|
|
|
|
object_ref(child);
|
|
g_assert(child->parent == NULL);
|
|
child->parent = obj;
|
|
|
|
g_free(type);
|
|
}
|
|
|
|
static void object_get_link_property(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
Object **child = opaque;
|
|
gchar *path;
|
|
|
|
if (*child) {
|
|
path = object_get_canonical_path(*child);
|
|
visit_type_str(v, &path, name, errp);
|
|
g_free(path);
|
|
} else {
|
|
path = (gchar *)"";
|
|
visit_type_str(v, &path, name, errp);
|
|
}
|
|
}
|
|
|
|
static void object_set_link_property(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
Object **child = opaque;
|
|
Object *old_target;
|
|
bool ambiguous = false;
|
|
const char *type;
|
|
char *path;
|
|
gchar *target_type;
|
|
|
|
type = object_property_get_type(obj, name, NULL);
|
|
|
|
visit_type_str(v, &path, name, errp);
|
|
|
|
old_target = *child;
|
|
*child = NULL;
|
|
|
|
if (strcmp(path, "") != 0) {
|
|
Object *target;
|
|
|
|
/* Go from link<FOO> to FOO. */
|
|
target_type = g_strndup(&type[5], strlen(type) - 6);
|
|
target = object_resolve_path_type(path, target_type, &ambiguous);
|
|
|
|
if (ambiguous) {
|
|
error_set(errp, QERR_AMBIGUOUS_PATH, path);
|
|
} else if (target) {
|
|
object_ref(target);
|
|
*child = target;
|
|
} else {
|
|
target = object_resolve_path(path, &ambiguous);
|
|
if (target || ambiguous) {
|
|
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
|
|
} else {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, path);
|
|
}
|
|
}
|
|
g_free(target_type);
|
|
}
|
|
|
|
g_free(path);
|
|
|
|
if (old_target != NULL) {
|
|
object_unref(old_target);
|
|
}
|
|
}
|
|
|
|
void object_property_add_link(Object *obj, const char *name,
|
|
const char *type, Object **child,
|
|
Error **errp)
|
|
{
|
|
gchar *full_type;
|
|
|
|
full_type = g_strdup_printf("link<%s>", type);
|
|
|
|
object_property_add(obj, name, full_type,
|
|
object_get_link_property,
|
|
object_set_link_property,
|
|
NULL, child, errp);
|
|
|
|
g_free(full_type);
|
|
}
|
|
|
|
gchar *object_get_canonical_path(Object *obj)
|
|
{
|
|
Object *root = object_get_root();
|
|
char *newpath = NULL, *path = NULL;
|
|
|
|
while (obj != root) {
|
|
ObjectProperty *prop = NULL;
|
|
|
|
g_assert(obj->parent != NULL);
|
|
|
|
QTAILQ_FOREACH(prop, &obj->parent->properties, node) {
|
|
if (!object_property_is_child(prop)) {
|
|
continue;
|
|
}
|
|
|
|
if (prop->opaque == obj) {
|
|
if (path) {
|
|
newpath = g_strdup_printf("%s/%s", prop->name, path);
|
|
g_free(path);
|
|
path = newpath;
|
|
} else {
|
|
path = g_strdup(prop->name);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
g_assert(prop != NULL);
|
|
|
|
obj = obj->parent;
|
|
}
|
|
|
|
newpath = g_strdup_printf("/%s", path);
|
|
g_free(path);
|
|
|
|
return newpath;
|
|
}
|
|
|
|
Object *object_resolve_path_component(Object *parent, const gchar *part)
|
|
{
|
|
ObjectProperty *prop = object_property_find(parent, part, NULL);
|
|
if (prop == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (object_property_is_link(prop)) {
|
|
return *(Object **)prop->opaque;
|
|
} else if (object_property_is_child(prop)) {
|
|
return prop->opaque;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static Object *object_resolve_abs_path(Object *parent,
|
|
gchar **parts,
|
|
const char *typename,
|
|
int index)
|
|
{
|
|
Object *child;
|
|
|
|
if (parts[index] == NULL) {
|
|
return object_dynamic_cast(parent, typename);
|
|
}
|
|
|
|
if (strcmp(parts[index], "") == 0) {
|
|
return object_resolve_abs_path(parent, parts, typename, index + 1);
|
|
}
|
|
|
|
child = object_resolve_path_component(parent, parts[index]);
|
|
if (!child) {
|
|
return NULL;
|
|
}
|
|
|
|
return object_resolve_abs_path(child, parts, typename, index + 1);
|
|
}
|
|
|
|
static Object *object_resolve_partial_path(Object *parent,
|
|
gchar **parts,
|
|
const char *typename,
|
|
bool *ambiguous)
|
|
{
|
|
Object *obj;
|
|
ObjectProperty *prop;
|
|
|
|
obj = object_resolve_abs_path(parent, parts, typename, 0);
|
|
|
|
QTAILQ_FOREACH(prop, &parent->properties, node) {
|
|
Object *found;
|
|
|
|
if (!object_property_is_child(prop)) {
|
|
continue;
|
|
}
|
|
|
|
found = object_resolve_partial_path(prop->opaque, parts,
|
|
typename, ambiguous);
|
|
if (found) {
|
|
if (obj) {
|
|
if (ambiguous) {
|
|
*ambiguous = true;
|
|
}
|
|
return NULL;
|
|
}
|
|
obj = found;
|
|
}
|
|
|
|
if (ambiguous && *ambiguous) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
Object *object_resolve_path_type(const char *path, const char *typename,
|
|
bool *ambiguous)
|
|
{
|
|
Object *obj;
|
|
gchar **parts;
|
|
|
|
parts = g_strsplit(path, "/", 0);
|
|
assert(parts);
|
|
|
|
if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
|
|
if (ambiguous) {
|
|
*ambiguous = false;
|
|
}
|
|
obj = object_resolve_partial_path(object_get_root(), parts,
|
|
typename, ambiguous);
|
|
} else {
|
|
obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
|
|
}
|
|
|
|
g_strfreev(parts);
|
|
|
|
return obj;
|
|
}
|
|
|
|
Object *object_resolve_path(const char *path, bool *ambiguous)
|
|
{
|
|
return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
|
|
}
|
|
|
|
typedef struct StringProperty
|
|
{
|
|
char *(*get)(Object *, Error **);
|
|
void (*set)(Object *, const char *, Error **);
|
|
} StringProperty;
|
|
|
|
static void property_get_str(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
StringProperty *prop = opaque;
|
|
char *value;
|
|
|
|
value = prop->get(obj, errp);
|
|
if (value) {
|
|
visit_type_str(v, &value, name, errp);
|
|
g_free(value);
|
|
}
|
|
}
|
|
|
|
static void property_set_str(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
StringProperty *prop = opaque;
|
|
char *value;
|
|
Error *local_err = NULL;
|
|
|
|
visit_type_str(v, &value, name, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
prop->set(obj, value, errp);
|
|
g_free(value);
|
|
}
|
|
|
|
static void property_release_str(Object *obj, const char *name,
|
|
void *opaque)
|
|
{
|
|
StringProperty *prop = opaque;
|
|
g_free(prop);
|
|
}
|
|
|
|
void object_property_add_str(Object *obj, const char *name,
|
|
char *(*get)(Object *, Error **),
|
|
void (*set)(Object *, const char *, Error **),
|
|
Error **errp)
|
|
{
|
|
StringProperty *prop = g_malloc0(sizeof(*prop));
|
|
|
|
prop->get = get;
|
|
prop->set = set;
|
|
|
|
object_property_add(obj, name, "string",
|
|
get ? property_get_str : NULL,
|
|
set ? property_set_str : NULL,
|
|
property_release_str,
|
|
prop, errp);
|
|
}
|
|
|
|
typedef struct BoolProperty
|
|
{
|
|
bool (*get)(Object *, Error **);
|
|
void (*set)(Object *, bool, Error **);
|
|
} BoolProperty;
|
|
|
|
static void property_get_bool(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
BoolProperty *prop = opaque;
|
|
bool value;
|
|
|
|
value = prop->get(obj, errp);
|
|
visit_type_bool(v, &value, name, errp);
|
|
}
|
|
|
|
static void property_set_bool(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
BoolProperty *prop = opaque;
|
|
bool value;
|
|
Error *local_err = NULL;
|
|
|
|
visit_type_bool(v, &value, name, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
prop->set(obj, value, errp);
|
|
}
|
|
|
|
static void property_release_bool(Object *obj, const char *name,
|
|
void *opaque)
|
|
{
|
|
BoolProperty *prop = opaque;
|
|
g_free(prop);
|
|
}
|
|
|
|
void object_property_add_bool(Object *obj, const char *name,
|
|
bool (*get)(Object *, Error **),
|
|
void (*set)(Object *, bool, Error **),
|
|
Error **errp)
|
|
{
|
|
BoolProperty *prop = g_malloc0(sizeof(*prop));
|
|
|
|
prop->get = get;
|
|
prop->set = set;
|
|
|
|
object_property_add(obj, name, "bool",
|
|
get ? property_get_bool : NULL,
|
|
set ? property_set_bool : NULL,
|
|
property_release_bool,
|
|
prop, errp);
|
|
}
|
|
|
|
static char *qdev_get_type(Object *obj, Error **errp)
|
|
{
|
|
return g_strdup(object_get_typename(obj));
|
|
}
|
|
|
|
static void object_instance_init(Object *obj)
|
|
{
|
|
object_property_add_str(obj, "type", qdev_get_type, NULL, NULL);
|
|
}
|
|
|
|
static void register_types(void)
|
|
{
|
|
static TypeInfo interface_info = {
|
|
.name = TYPE_INTERFACE,
|
|
.class_size = sizeof(InterfaceClass),
|
|
.abstract = true,
|
|
};
|
|
|
|
static TypeInfo object_info = {
|
|
.name = TYPE_OBJECT,
|
|
.instance_size = sizeof(Object),
|
|
.instance_init = object_instance_init,
|
|
.abstract = true,
|
|
};
|
|
|
|
type_interface = type_register_internal(&interface_info);
|
|
type_register_internal(&object_info);
|
|
}
|
|
|
|
type_init(register_types)
|