Function test_full_page_reg

test/buf-ring.c:209–255

}

static int test_full_page_reg(int bgid)
{
#if defined(__hppa__)
	return T_EXIT_SKIP;
#else
	struct io_uring ring;
	int ret;
	void *ptr;
	struct io_uring_buf_reg reg = { };
	int entries = pagesize / sizeof(struct io_uring_buf);

	ret = io_uring_queue_init(1, &ring, 0);
	if (ret) {
		fprintf(stderr, "queue init failed %d\n", ret);
		return T_EXIT_FAIL;
	}

	ret = posix_memalign(&ptr, pagesize, pagesize * 2);
	if (ret) {
		fprintf(stderr, "posix_memalign failed %d\n", ret);
		goto err;
	}

	ret = mprotect(ptr + pagesize, pagesize, PROT_NONE);
	if (ret) {
		fprintf(stderr, "mprotect failed %d\n", errno);
		goto err1;
	}

	reg.ring_addr = (unsigned long) ptr;
	reg.ring_entries = entries;
	reg.bgid = bgid;

	ret = io_uring_register_buf_ring(&ring, &reg, 0);
	if (ret)
		fprintf(stderr, "register buf ring failed %d\n", ret);

	if (mprotect(ptr + pagesize, pagesize, PROT_READ | PROT_WRITE))
		fprintf(stderr, "reverting mprotect failed %d\n", errno);

err1:
	free(ptr);
err:
	io_uring_queue_exit(&ring);
	return ret ? T_EXIT_FAIL : T_EXIT_PASS;
#endif
}

static int test_one_read(int fd, int bgid, struct io_uring *ring)
{