These can set a link to any object, as long as it is included in
the composition tree.
Signed-off-by: Paolo Bonzini<address@hidden>
---
include/qemu/object.h | 24 ++++++++++++++++++++++++
qom/object.c | 25 +++++++++++++++++++++++++
2 files changed, 49 insertions(+), 0 deletions(-)
diff --git a/include/qemu/object.h b/include/qemu/object.h
index 4ec7942..910b767 100644
--- a/include/qemu/object.h
+++ b/include/qemu/object.h
@@ -658,6 +658,30 @@ char *object_property_get_str(Object *obj, const char
*name,
struct Error **errp);
/**
+ * object_property_set_link:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes an object's canonical path to a property.
+ */
+void object_property_set_link(Object *obj, Object *value,
+ const char *name, struct Error **errp);
+
+/**
+ * object_property_get_link:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Returns: the value of the property, resolved from a path to an Object,
+ * or NULL if an error occurs (including when the property value is not a
+ * string or not a valid object path).
+ */
+Object *object_property_get_link(Object *obj, const char *name,
+ struct Error **errp);
+
+/**
* object_property_set_bool:
* @value: the value to be written to the property
* @name: the name of the property
diff --git a/qom/object.c b/qom/object.c
index e8418bc..b3cff50 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -710,6 +710,30 @@ char *object_property_get_str(Object *obj, const char
*name,
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)
{