On 06/05/2020 00:34, David Sterba wrote: > On Mon, May 04, 2020 at 08:38:36AM +0000, Johannes Thumshirn wrote: >> 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. > > Which also means that nodatacow can't be used as it implies nodatasum. > Yep, did this already.
