Function libcryptsetup_sys::crypt_keyslot_add_by_volume_key

pub unsafe extern "C" fn crypt_keyslot_add_by_volume_key(
    cd: *mut crypt_device, 
    keyslot: c_int, 
    volume_key: *const c_char, 
    volume_key_size: size_t, 
    passphrase: *const c_char, 
    passphrase_size: size_t
) -> c_int