qom: Split object_property_set_link()
The path resolution logic in object_property_set_link() should be a separate function. This makes the code easier to read and maintain. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
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qom/object.c
60
qom/object.c
@ -1039,17 +1039,50 @@ static void object_get_link_property(Object *obj, Visitor *v, void *opaque,
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}
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}
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/*
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* object_resolve_link:
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*
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* Lookup an object and ensure its type matches the link property type. This
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* is similar to object_resolve_path() except type verification against the
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* link property is performed.
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*
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* Returns: The matched object or NULL on path lookup failures.
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*/
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static Object *object_resolve_link(Object *obj, const char *name,
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const char *path, Error **errp)
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{
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const char *type;
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gchar *target_type;
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bool ambiguous = false;
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Object *target;
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/* Go from link<FOO> to FOO. */
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type = object_property_get_type(obj, name, NULL);
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target_type = g_strndup(&type[5], strlen(type) - 6);
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target = object_resolve_path_type(path, target_type, &ambiguous);
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if (ambiguous) {
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error_set(errp, QERR_AMBIGUOUS_PATH, path);
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} else if (!target) {
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target = object_resolve_path(path, &ambiguous);
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if (target || ambiguous) {
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error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
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} else {
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error_set(errp, QERR_DEVICE_NOT_FOUND, path);
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}
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target = NULL;
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}
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g_free(target_type);
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return target;
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}
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static void object_set_link_property(Object *obj, Visitor *v, void *opaque,
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const char *name, Error **errp)
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{
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Object **child = opaque;
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Object *old_target;
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bool ambiguous = false;
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const char *type;
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char *path;
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gchar *target_type;
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type = object_property_get_type(obj, name, NULL);
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visit_type_str(v, &path, name, errp);
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@ -1059,25 +1092,12 @@ static void object_set_link_property(Object *obj, Visitor *v, void *opaque,
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if (strcmp(path, "") != 0) {
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Object *target;
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/* Go from link<FOO> to FOO. */
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target_type = g_strndup(&type[5], strlen(type) - 6);
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target = object_resolve_path_type(path, target_type, &ambiguous);
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if (ambiguous) {
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error_set(errp, QERR_AMBIGUOUS_PATH, path);
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} else if (target) {
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target = object_resolve_link(obj, name, path, errp);
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if (target) {
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object_ref(target);
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*child = target;
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} else {
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target = object_resolve_path(path, &ambiguous);
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if (target || ambiguous) {
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error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
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} else {
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error_set(errp, QERR_DEVICE_NOT_FOUND, path);
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}
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}
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g_free(target_type);
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}
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g_free(path);
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