[v2,0/3,RESEND] sed-opal: keyrings, discovery, revert, key store

Message

Greg Joyce Aug. 18, 2022, 2:30 p.m. UTC

From: Greg Joyce <[e-mail]>

TCG SED Opal is a specification from The Trusted Computing Group
that allows self encrypting storage devices (SED) to be locked at
power on and require an authentication key to unlock the drive.

The current SED Opal implementation in the block driver
requires that authentication keys be provided in an ioctl
so that they can be presented to the underlying SED
capable drive. Currently, the key is typically entered by
a user with an application like sedutil or sedcli. While
this process works, it does not lend itself to automation
like unlock by a udev rule.

The SED block driver has been extended so it can alternatively
obtain a key from a sed-opal kernel keyring. The SED ioctls
will indicate the source of the key, either directly in the
ioctl data or from the keyring.

Two new SED ioctls have also been added. These are:
  1) IOC_OPAL_REVERT_LSP to revert LSP state
  2) IOC_OPAL_DISCOVERY to discover drive capabilities/state

change log:
	- removed platform functions for persistent key storage
	- replaced key update logic with key_create_or_update()
	- minor bracing and padding changes
	- add error returns
	- opal_key structure is application provided but kernel
	  verified
	- added brief description of TCG SED Opal

Greg Joyce (3):
  block: sed-opal: Implement IOC_OPAL_DISCOVERY
  block: sed-opal: Implement IOC_OPAL_REVERT_LSP
  block: sed-opal: keyring support for SED Opal keys

 block/Kconfig                 |   1 +
 block/opal_proto.h            |   4 +
 block/sed-opal.c              | 252 +++++++++++++++++++++++++++++++++-
 include/linux/sed-opal.h      |   5 +
 include/uapi/linux/sed-opal.h |  25 +++-
 5 files changed, 281 insertions(+), 6 deletions(-)


Signed-off-by: Greg Joyce <[e-mail]>
Reported-by: kernel test robot <[e-mail]>
base-commit: ff6992735ade75aae3e35d16b17da1008d753d28