On 30/03/2021 11:26, Pavel Begunkov wrote:
> Check that CQEs of a link comes in the order of submission, even when
> a link fails early during submission initial prep.
up
>
> Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
> ---
> test/link.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 53 insertions(+)
>
> diff --git a/test/link.c b/test/link.c
> index c89d6b2..fadd0b5 100644
> --- a/test/link.c
> +++ b/test/link.c
> @@ -429,6 +429,53 @@ err:
> return 1;
> }
>
> +static int test_link_fail_ordering(struct io_uring *ring)
> +{
> + struct io_uring_cqe *cqe;
> + struct io_uring_sqe *sqe;
> + int ret, i, nr_compl;
> +
> + sqe = io_uring_get_sqe(ring);
> + io_uring_prep_nop(sqe);
> + sqe->flags |= IOSQE_IO_LINK;
> + sqe->user_data = 0;
> +
> + sqe = io_uring_get_sqe(ring);
> + io_uring_prep_write(sqe, -1, NULL, 100, 0);
> + sqe->flags |= IOSQE_IO_LINK;
> + sqe->user_data = 1;
> +
> + sqe = io_uring_get_sqe(ring);
> + io_uring_prep_nop(sqe);
> + sqe->flags |= IOSQE_IO_LINK;
> + sqe->user_data = 2;
> +
> + nr_compl = ret = io_uring_submit(ring);
> + /* at least the first nop should have been submitted */
> + if (ret < 1) {
> + fprintf(stderr, "sqe submit failed: %d\n", ret);
> + goto err;
> + }
> +
> + for (i = 0; i < nr_compl; i++) {
> + ret = io_uring_wait_cqe(ring, &cqe);
> + if (ret) {
> + fprintf(stderr, "wait completion %d\n", ret);
> + goto err;
> + }
> + if (cqe->user_data != i) {
> + fprintf(stderr, "wrong CQE order, got %i, expected %i\n",
> + (int)cqe->user_data, i);
> + goto err;
> + }
> + io_uring_cqe_seen(ring, cqe);
> + }
> +
> + return 0;
> +err:
> + return 1;
> +}
> +
> int main(int argc, char *argv[])
> {
> struct io_uring ring, poll_ring;
> @@ -492,5 +539,11 @@ int main(int argc, char *argv[])
> return ret;
> }
>
> + ret = test_link_fail_ordering(&ring);
> + if (ret) {
> + fprintf(stderr, "test_link_fail_ordering last failed\n");
> + return ret;
> + }
> +
> return 0;
> }
>
--
Pavel Begunkov
