On 01/05/2020 08:30, Eric Biggers wrote: > btrfs also has an inode flag BTRFS_INODE_NODATASUM, which looks scary as it > results in the file being unauthenticated. Presumably the authentication of the > filesystem metadata is supposed to prevent this flag from being maliciously > cleared? It might be a good idea to forbid this flag if the filesystem is using > the authentication feature. Yes indeed, authentication and nodatasum must be mutually exclusive. Thanks for spotting.