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-rw-r--r--qom/object.c468
1 files changed, 468 insertions, 0 deletions
diff --git a/qom/object.c b/qom/object.c
index 3dabb1abb0..2506d78e68 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -12,6 +12,9 @@
#include "qemu/object.h"
#include "qemu-common.h"
+#include "qapi/qapi-visit-core.h"
+#include "hw/qdev.h"
+// FIXME remove above
#define MAX_INTERFACES 32
@@ -258,6 +261,7 @@ void object_initialize_with_type(void *data, TypeImpl *type)
memset(obj, 0, type->instance_size);
obj->class = type->class;
+ QTAILQ_INIT(&obj->properties);
object_init_with_type(obj, type);
}
@@ -268,6 +272,45 @@ void object_initialize(void *data, const char *typename)
object_initialize_with_type(data, type);
}
+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 (!strstart(prop->type, "child<", NULL)) {
+ continue;
+ }
+
+ if (prop->opaque == child) {
+ object_property_del(obj, prop->name, errp);
+ }
+ }
+}
+
+void object_unparent(Object *obj)
+{
+ if (obj->parent) {
+ object_property_del_child(obj->parent, obj, NULL);
+ }
+}
+
static void object_deinit(Object *obj, TypeImpl *type)
{
if (type->instance_finalize) {
@@ -283,6 +326,8 @@ static void object_deinit(Object *obj, TypeImpl *type)
if (type_has_parent(type)) {
object_deinit(obj, type_get_parent(type));
}
+
+ object_unparent(obj);
}
void object_finalize(void *data)
@@ -291,6 +336,7 @@ void object_finalize(void *data)
TypeImpl *ti = obj->class->type;
object_deinit(obj, ti);
+ object_property_del_all(obj);
}
Object *object_new_with_type(Type type)
@@ -502,3 +548,425 @@ void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
}
+
+void object_ref(Object *obj)
+{
+ obj->ref++;
+}
+
+void object_unref(Object *obj)
+{
+ g_assert(obj->ref > 0);
+ obj->ref--;
+
+ /* parent always holds a reference to its children */
+ if (obj->ref == 0) {
+ 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 = 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);
+}
+
+static ObjectProperty *object_property_find(Object *obj, const char *name)
+{
+ ObjectProperty *prop;
+
+ QTAILQ_FOREACH(prop, &obj->properties, node) {
+ if (strcmp(prop->name, name) == 0) {
+ return prop;
+ }
+ }
+
+ return NULL;
+}
+
+void object_property_del(Object *obj, const char *name, Error **errp)
+{
+ ObjectProperty *prop = object_property_find(obj, name);
+
+ QTAILQ_REMOVE(&obj->properties, prop, node);
+
+ prop->release(obj, prop->name, prop->opaque);
+
+ 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);
+
+ if (prop == NULL) {
+ error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name);
+ 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);
+
+ if (prop == NULL) {
+ error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name);
+ return;
+ }
+
+ if (!prop->set) {
+ error_set(errp, QERR_PERMISSION_DENIED);
+ } else {
+ prop->set(obj, v, prop->opaque, name, errp);
+ }
+}
+
+const char *object_property_get_type(Object *obj, const char *name, Error **errp)
+{
+ ObjectProperty *prop = object_property_find(obj, name);
+
+ if (prop == NULL) {
+ error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name);
+ return NULL;
+ }
+
+ return prop->type;
+}
+
+Object *object_get_root(void)
+{
+ static DeviceState *object_root;
+
+ if (!object_root) {
+ object_root = qdev_create(NULL, "container");
+ qdev_init_nofail(object_root);
+ }
+
+ return OBJECT(object_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);
+}
+
+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, NULL, 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;
+ bool ambiguous = false;
+ const char *type;
+ char *path;
+
+ type = object_property_get_type(obj, name, NULL);
+
+ visit_type_str(v, &path, name, errp);
+
+ if (*child) {
+ object_unref(*child);
+ }
+
+ if (strcmp(path, "") != 0) {
+ Object *target;
+
+ target = object_resolve_path(path, &ambiguous);
+ if (target) {
+ gchar *target_type;
+
+ target_type = g_strdup_printf("link<%s>",
+ object_get_typename(OBJECT(target)));
+ if (strcmp(target_type, type) == 0) {
+ *child = target;
+ object_ref(target);
+ } else {
+ error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, type);
+ }
+
+ g_free(target_type);
+ } else {
+ error_set(errp, QERR_DEVICE_NOT_FOUND, path);
+ }
+ } else {
+ *child = NULL;
+ }
+
+ g_free(path);
+}
+
+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 (!strstart(prop->type, "child<", NULL)) {
+ 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;
+}
+
+static Object *object_resolve_abs_path(Object *parent,
+ gchar **parts,
+ int index)
+{
+ ObjectProperty *prop;
+ Object *child;
+
+ if (parts[index] == NULL) {
+ return parent;
+ }
+
+ if (strcmp(parts[index], "") == 0) {
+ return object_resolve_abs_path(parent, parts, index + 1);
+ }
+
+ prop = object_property_find(parent, parts[index]);
+ if (prop == NULL) {
+ return NULL;
+ }
+
+ child = NULL;
+ if (strstart(prop->type, "link<", NULL)) {
+ Object **pchild = prop->opaque;
+ if (*pchild) {
+ child = *pchild;
+ }
+ } else if (strstart(prop->type, "child<", NULL)) {
+ child = prop->opaque;
+ }
+
+ if (!child) {
+ return NULL;
+ }
+
+ return object_resolve_abs_path(child, parts, index + 1);
+}
+
+static Object *object_resolve_partial_path(Object *parent,
+ gchar **parts,
+ bool *ambiguous)
+{
+ Object *obj;
+ ObjectProperty *prop;
+
+ obj = object_resolve_abs_path(parent, parts, 0);
+
+ QTAILQ_FOREACH(prop, &parent->properties, node) {
+ Object *found;
+
+ if (!strstart(prop->type, "child<", NULL)) {
+ continue;
+ }
+
+ found = object_resolve_partial_path(prop->opaque, parts, ambiguous);
+ if (found) {
+ if (obj) {
+ if (ambiguous) {
+ *ambiguous = true;
+ }
+ return NULL;
+ }
+ obj = found;
+ }
+
+ if (ambiguous && *ambiguous) {
+ return NULL;
+ }
+ }
+
+ return obj;
+}
+
+Object *object_resolve_path(const char *path, bool *ambiguous)
+{
+ bool partial_path = true;
+ Object *obj;
+ gchar **parts;
+
+ parts = g_strsplit(path, "/", 0);
+ if (parts == NULL || parts[0] == NULL) {
+ g_strfreev(parts);
+ return object_get_root();
+ }
+
+ if (strcmp(parts[0], "") == 0) {
+ partial_path = false;
+ }
+
+ if (partial_path) {
+ if (ambiguous) {
+ *ambiguous = false;
+ }
+ obj = object_resolve_partial_path(object_get_root(), parts, ambiguous);
+ } else {
+ obj = object_resolve_abs_path(object_get_root(), parts, 1);
+ }
+
+ g_strfreev(parts);
+
+ return obj;
+}
+
+typedef struct StringProperty
+{
+ char *(*get)(Object *, Error **);
+ void (*set)(Object *, const char *, Error **);
+} StringProperty;
+
+static void object_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 object_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 object_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 ? object_property_get_str : NULL,
+ set ? object_property_set_str : NULL,
+ object_property_release_str,
+ prop, errp);
+}