Using service-linked roles for DataSync - Amazon DataSync
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Using service-linked roles for DataSync

Amazon DataSync uses Amazon Identity and Access Management (IAM) service-linked roles. A service-linked role is a unique type of IAM role that is linked directly to DataSync. Service-linked roles are predefined by DataSync and include all the permissions that the service requires to call other Amazon services on your behalf.