sub_index_data
u8 buffer[sizeof(struct sub_index_data)];
result = VDO_ASSERT(offset == sizeof(struct sub_index_data),
sizeof(struct sub_index_data));
*bytes = (sizeof(struct sub_index_data) + params.list_count * sizeof(u64) +
struct sub_index_data header;
u8 buffer[sizeof(struct sub_index_data)];