qxl_data_chunk
struct qxl_data_chunk chunk;
struct qxl_data_chunk chunk;
struct qxl_data_chunk chunk;
struct qxl_data_chunk chunk;
struct qxl_data_chunk *chunk;
size = PAGE_SIZE - offsetof(struct qxl_data_chunk, data);
out_offset = offsetof(struct qxl_data_chunk, data) + i * chunk_stride;
ret = qxl_allocate_chunk(qdev, release, image, sizeof(struct qxl_data_chunk) + stride * height);