Documentation/filesystems/fscrypt.rst

673   `FS_IOC_ADD_ENCRYPTION_KEY`_.  Then, the ``key_spec.u.identifier``
848             struct fscrypt_key_specifier key_spec;
880   ``key_spec.type`` must contain FSCRYPT_KEY_SPEC_TYPE_DESCRIPTOR, and
881   ``key_spec.u.descriptor`` must contain the descriptor of the key
888   policies, then ``key_spec.type`` must contain
889   FSCRYPT_KEY_SPEC_TYPE_IDENTIFIER, and ``key_spec.u.identifier`` is
904   key, whose ``type`` field matches ``key_spec.type``, and whose
1040             struct fscrypt_key_specifier key_spec;
1049 - The key to remove is specified by ``key_spec``:
1052       ``key_spec.type`` to FSCRYPT_KEY_SPEC_TYPE_DESCRIPTOR and fill
1053       in ``key_spec.u.descriptor``.  To remove this type of key, the
1058       ``key_spec.type`` to FSCRYPT_KEY_SPEC_TYPE_IDENTIFIER and fill
1059       in ``key_spec.u.identifier``.
1137             struct fscrypt_key_specifier key_spec;
1151 The caller must zero all input fields, then fill in ``key_spec``:
1154       ``key_spec.type`` to FSCRYPT_KEY_SPEC_TYPE_DESCRIPTOR and fill
1155       in ``key_spec.u.descriptor``.
1158       ``key_spec.type`` to FSCRYPT_KEY_SPEC_TYPE_IDENTIFIER and fill
1159       in ``key_spec.u.identifier``.