Re: [PATCH v2 1/2] btrfs: add authentication support

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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.



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