Here are the data structures with brief descriptions:

Ccrypt_active_device
Ccrypt_params_hw_opal
Ccrypt_params_integrity
Ccrypt_params_loopaes
Ccrypt_params_luks1
Ccrypt_params_luks2
Ccrypt_params_plain
Ccrypt_params_reencrypt
Ccrypt_params_tcrypt
Ccrypt_params_verity
Ccrypt_pbkdf_type
Ccrypt_token_handler
Ccrypt_token_params_luks2_keyring