Function default_error

examples/proxy.c:290–299

		      struct io_uring_cqe *cqe);

static int default_error(struct error_handler *err,
			 struct io_uring __attribute__((__unused__)) *ring,
			 struct io_uring_cqe *cqe)
{
	struct conn *c = cqe_to_conn(cqe);

	fprintf(stderr, "%d: %s error %s\n", c->tid, err->name, strerror(-cqe->res));
	fprintf(stderr, "fd=%d, bid=%d\n", cqe_to_fd(cqe), cqe_to_bid(cqe));
	return 1;
}

/*
 * Move error handling out of the normal handling path, cleanly separating