[PATCH v2 00/11] fscrypt: rearrangements preliminary to extent encryption

[Sweet Tea Dorminy <sweettea-kernel@dorminy.me>]

As per [1], extent-based encryption needs to split allocating and
preparing crypto_skciphers, since extent infos will be loaded at IO time
and crypto_skciphers cannot be allocated at IO time. 

This changeset undertakes to split the existing code to clearly
distinguish preparation and allocation of fscrypt_prepared_keys,
wrapping crypto_skciphers. Elegance of code is in the eye of the
beholder, but I've tried a decent variety of arrangements here and this
seems like the clearest result to me; happy to adjust as desired, and
more changesets coming soon, this just seemed like the clearest cutoff
point for preliminaries without being pure refactoring.

Patchset should apply cleanly to fscrypt/for-next (as per base-commit
below), and pass ext4/f2fs tests (kvm-xfstests is not currently
succesfully setting up ubifs volumes for me).

[1] https://lore.kernel.org/linux-btrfs/Y7NQ1CvPyJiGRe00@sol.localdomain/ 

Changes from v1:
Included change 1, erroneously dropped, and generated patches using --base.

Sweet Tea Dorminy (11):
  fscrypt: move inline crypt decision to info setup.
  fscrypt: split and rename setup_file_encryption_key()
  fscrypt: split and rename setup_per_mode_enc_key()
  fscrypt: move dirhash key setup away from IO key setup
  fscrypt: reduce special-casing of IV_INO_LBLK_32
  fscrypt: make infos have a pointer to prepared keys
  fscrypt: move all the shared mode key setup deeper
  fscrypt: make ci->ci_direct_key a bool not a pointer
  fscrypt: make prepared keys record their type.
  fscrypt: explicitly track prepared parts of key
  fscrypt: split key alloc and preparation

 fs/crypto/crypto.c          |   2 +-
 fs/crypto/fname.c           |   4 +-
 fs/crypto/fscrypt_private.h |  73 +++++--
 fs/crypto/inline_crypt.c    |  30 +--
 fs/crypto/keysetup.c        | 387 ++++++++++++++++++++++++------------
 fs/crypto/keysetup_v1.c     |  13 +-
 6 files changed, 340 insertions(+), 169 deletions(-)


base-commit: 83e57e47906ce0e99bd61c70fae514e69960d274
-- 
2.40.0