Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt

Pull fscrypt updates from Eric Biggers:

 - Extend the FS_IOC_ADD_ENCRYPTION_KEY ioctl to allow the raw key to be
   provided via a keyring key.

 - Prepare for the new dirhash method (SipHash of plaintext name) that
   will be used by directories that are both encrypted and casefolded.

 - Switch to a new format for "no-key names" that prepares for the new
   dirhash method, and also fixes a longstanding bug where multiple
   filenames could map to the same no-key name.

 - Allow the crypto algorithms used by fscrypt to be built as loadable
   modules when the fscrypt-capable filesystems are.

 - Optimize fscrypt_zeroout_range().

 - Various cleanups.

* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt: (26 commits)
  fscrypt: improve format of no-key names
  ubifs: allow both hash and disk name to be provided in no-key names
  ubifs: don't trigger assertion on invalid no-key filename
  fscrypt: clarify what is meant by a per-file key
  fscrypt: derive dirhash key for casefolded directories
  fscrypt: don't allow v1 policies with casefolding
  fscrypt: add "fscrypt_" prefix to fname_encrypt()
  fscrypt: don't print name of busy file when removing key
  ubifs: use IS_ENCRYPTED() instead of ubifs_crypt_is_encrypted()
  fscrypt: document gfp_flags for bounce page allocation
  fscrypt: optimize fscrypt_zeroout_range()
  fscrypt: remove redundant bi_status check
  fscrypt: Allow modular crypto algorithms
  fscrypt: include <linux/ioctl.h> in UAPI header
  fscrypt: don't check for ENOKEY from fscrypt_get_encryption_info()
  fscrypt: remove fscrypt_is_direct_key_policy()
  fscrypt: move fscrypt_valid_enc_modes() to policy.c
  fscrypt: check for appropriate use of DIRECT_KEY flag earlier
  fscrypt: split up fscrypt_supported_policy() by policy version
  fscrypt: introduce fscrypt_needs_contents_encryption()
  ...

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