linux-kernel - [RFC 0/4] fs: provide per-filesystem options to disable fscrypt

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Date:   Thu, 10 Nov 2022 15:12:21 +0100
From:   Niels de Vos <ndevos@...hat.com>
To:     linux-fscrypt@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Xiubo Li <xiubli@...hat.com>,
        Marcel Lauhoff <marcel.lauhoff@...e.com>,
        Niels de Vos <ndevos@...hat.com>
Subject: [RFC 0/4] fs: provide per-filesystem options to disable fscrypt

While more filesystems are getting support for fscrypt, it is useful to
be able to disable fscrypt for a selection of filesystems, while
enabling it for others.

The new USE_FS_ENCRYPTION define gets picked up in
include/linux/fscrypt.h. This allows filesystems to choose to use the
empty function definitions, or the functional ones when fscrypt is to be
used with the filesystem.

Using USE_FS_ENCRYPTION is a relatively clean approach, and requires
minimal changes to the filesystems supporting fscrypt. This RFC is
mostly for checking the acceptance of this solution, or if an other
direction is preferred.

---

Niels de Vos (4):
  fscrypt: introduce USE_FS_ENCRYPTION
  fs: make fscrypt support an ext4 config option
  fs: make fscrypt support a f2fs config option
  fs: make fscrypt support a UBIFS config option

 Documentation/filesystems/fscrypt.rst |  2 +-
 fs/crypto/Kconfig                     |  3 +++
 fs/crypto/fscrypt_private.h           |  2 ++
 fs/ext4/Kconfig                       | 13 ++++++++++++-
 fs/ext4/Makefile                      |  2 +-
 fs/ext4/ext4.h                        | 12 ++++++++----
 fs/ext4/inode.c                       |  6 +++---
 fs/ext4/namei.c                       |  6 +++---
 fs/ext4/super.c                       |  6 +++---
 fs/ext4/sysfs.c                       |  8 ++++----
 fs/f2fs/Kconfig                       | 15 +++++++++++++--
 fs/f2fs/data.c                        |  2 +-
 fs/f2fs/dir.c                         |  6 +++---
 fs/f2fs/f2fs.h                        |  8 ++++++--
 fs/f2fs/super.c                       |  6 +++---
 fs/f2fs/sysfs.c                       |  8 ++++----
 fs/ubifs/Kconfig                      | 14 ++++++++++++--
 fs/ubifs/Makefile                     |  2 +-
 fs/ubifs/sb.c                         |  4 ++--
 fs/ubifs/ubifs.h                      |  7 +++++--
 include/linux/fscrypt.h               |  6 +++---
 21 files changed, 93 insertions(+), 45 deletions(-)

-- 
2.37.3