Function test_offsets

test/reg-wait.c:106–168

}

static int test_offsets(struct io_uring *ring, struct io_uring_reg_wait *base,
			size_t size, bool overallocated)
{
	struct io_uring_cqe *cqe;
	int max_index = size / sizeof(struct io_uring_reg_wait);
	struct io_uring_reg_wait *rw;
	unsigned long offset;
	int copy_size;
	void *rw_ptr;
	int ret;

	rw = base;
	memcpy(rw, &brief_wait, sizeof(brief_wait));
	ret = io_uring_submit_and_wait_reg(ring, &cqe, 1, 0);
	if (ret != -ETIME) {
		fprintf(stderr, "0 index failed: %d\n", ret);
		return T_EXIT_FAIL;
	}

	if (overallocated) {
		rw = base + max_index;
		memcpy(rw, &brief_wait, sizeof(brief_wait));
	}
	ret = io_uring_submit_and_wait_reg(ring, &cqe, 1, max_index);
	if (ret != -EFAULT) {
		fprintf(stderr, "max+1 index failed: %d\n", ret);
		return T_EXIT_FAIL;
	}

	rw = base + max_index - 1;
	memcpy(rw, &brief_wait, sizeof(brief_wait));
	ret = io_uring_submit_and_wait_reg(ring, &cqe, 1, max_index - 1);
	if (ret != -ETIME) {
		fprintf(stderr, "last index failed: %d\n", ret);
		return T_EXIT_FAIL;
	}

	offset = 0UL - sizeof(long);
	ret = test_wait_reg_offset(ring, 1, offset);
	if (ret != -EFAULT) {
		fprintf(stderr, "overflow offset failed: %d\n", ret);
		return T_EXIT_FAIL;
	}

	offset = size - sizeof(long);
	rw = (void *)base + offset;
	copy_size = overallocated ? sizeof(brief_wait) : sizeof(long);
	memcpy(rw, &brief_wait, copy_size);

	ret = test_wait_reg_offset(ring, 1, offset);
	if (ret != -EFAULT) {
		fprintf(stderr, "OOB offset failed: %d\n", ret);
		return T_EXIT_FAIL;
	}

	offset = 1;
	rw_ptr = (void *) base + offset;
	memcpy(rw_ptr, &brief_wait, sizeof(brief_wait));