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qom: Split object_property_set_link()

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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>
This commit is contained in:
Stefan Hajnoczi 2014-03-19 08:58:53 +01:00 committed by Andreas Färber
parent c8897e8eb9
commit f5ec6704c7
1 changed files with 40 additions and 20 deletions
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60
qom/object.c
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@ -1039,17 +1039,50 @@ static void object_get_link_property(Object *obj, Visitor *v, void *opaque,
}
}
/*
* object_resolve_link:
*
* Lookup an object and ensure its type matches the link property type. This
* is similar to object_resolve_path() except type verification against the
* link property is performed.
*
* Returns: The matched object or NULL on path lookup failures.
*/
static Object *object_resolve_link(Object *obj, const char *name,
const char *path, Error **errp)
{
const char *type;
gchar *target_type;
bool ambiguous = false;
Object *target;
/* Go from link<FOO> to FOO. */
type = object_property_get_type(obj, name, NULL);
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) {
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);
}
target = NULL;
}
g_free(target_type);
return target;
}
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);
@ -1059,24 +1092,11 @@ static void object_set_link_property(Object *obj, Visitor *v, void *opaque,
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) {
target = object_resolve_link(obj, name, path, errp);
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);