[PATCH v2 0/4] ubifs: support authentication without hmac

[Torben Hohn]

This PQ adds support for ubifs authentication without HMAC,
which obviously only works for a read-only mount.

ubiblock and dm-verity are not supported by u-boot, and
the kernel on the target is loaded by u-boot out of the RFS.

This is a first try to implement this.
It boots fine, and the WARN_ON is not triggered.

I plan to update the docs also, but i would like to have
some positive comments on this before.

Changes since v1:

- apply comments from Sascha an revert the
  ubifs_authicated_(read|write) stuff.
  Use ubifs_assert(c, !c->ro_mount) instead.
- Prevent remount rw, when hmac-less authentication is used
- add missing check, for ro mode, when no auth_key_name is specified.

Torben Hohn (4):
  ubifs: move #include "debug.h" above auth.c
  ubifs: support authentication, for ro mount, when no key is given
  ubifs: sprinkle ubifs_assert(c, !c->ro_mount) in hmac auth
  ubifs: prevent remounting rw when no hmac key was given

 fs/ubifs/auth.c    | 62 +++++++++++++++++++++++++++++++++++++++++++++-
 fs/ubifs/gc.c      |  1 +
 fs/ubifs/journal.c |  8 ++++++
 fs/ubifs/replay.c  |  1 +
 fs/ubifs/sb.c      |  5 ++++
 fs/ubifs/super.c   | 28 ++++++++++++++++++++-
 fs/ubifs/ubifs.h   | 12 ++++++++-
 7 files changed, 114 insertions(+), 3 deletions(-)

-- 
2.20.1