Re: [PATCH v4 4/4] ext4: add inline encryption support

tytso
2020-07-08T17:18:35Z

On Thu, Jul 02, 2020 at 01:56:07AM +0000, Satya Tangirala wrote:
> From: Eric Biggers <ebiggers@google.com>
>
> Wire up ext4 to support inline encryption via the helper functions which
> fs/crypto/ now provides. This includes:
>
> - Adding a mount option 'inlinecrypt' which enables inline encryption
> on encrypted files where it can be used.
>
> - Setting the bio_crypt_ctx on bios that will be submitted to an
> inline-encrypted file.
>
> Note: submit_bh_wbc() in fs/buffer.c also needed to be patched for
> this part, since ext4 sometimes uses ll_rw_block() on file data.
>
> - Not adding logically discontiguous data to bios that will be submitted
> to an inline-encrypted file.
>
> - Not doing filesystem-layer crypto on inline-encrypted files.
>
> Signed-off-by: Eric Biggers <ebiggers@google.com>
> Co-developed-by: Satya Tangirala <satyat@google.com>
> Signed-off-by: Satya Tangirala <satyat@google.com>

Reviewed-by: Theodore Ts'o <tytso@mit.edu>