Function __io_uring_submit

src/queue.c:480–499

* Submit sqes acquired from io_uring_get_sqe() to the kernel. * * Returns number of sqes submitted */

 * Returns number of sqes submitted
 */
static int __io_uring_submit(struct io_uring *ring, unsigned submitted,
			     unsigned wait_nr, bool getevents)
{
	bool cq_needs_enter = getevents || wait_nr || cq_ring_needs_enter(ring);
	unsigned flags = ring_enter_flags(ring);
	int ret;

	liburing_sanitize_ring(ring);

	if (sq_ring_needs_enter(ring, submitted, &flags) || cq_needs_enter) {
		if (cq_needs_enter)
			flags |= IORING_ENTER_GETEVENTS;

		ret = __sys_io_uring_enter(ring->enter_ring_fd, submitted,
					   wait_nr, flags, NULL);
	} else
		ret = submitted;

	return ret;
}

static int __io_uring_submit_and_wait(struct io_uring *ring, unsigned wait_nr)
{