t/io_uring: verbose error for -95/-EOPNOTSUPP failure

If we fail with this error and polling is enabled, it's because the
file system hosting the file doesn't support polling. Let the user
know.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/t/io_uring.c b/t/io_uring.c
index 62b48e446dea5ee517d7ddf59f5e12f99428ae26..7c75c887eb4f511616dfdba9fa48068e23832dd7 100644 (file)
--- a/t/io_uring.c
+++ b/t/io_uring.c
@@ -262,6 +262,8 @@ static int reap_events(struct submitter *s)
                        f->pending_ios--;
                        if (cqe->res != BS) {
                                printf("io: unexpected ret=%d\n", cqe->res);
                        f->pending_ios--;
                        if (cqe->res != BS) {
                                printf("io: unexpected ret=%d\n", cqe->res);

+                               if (polled && cqe->res == -EOPNOTSUPP)
+                                       printf("Your filesystem doesn't support poll\n");

                                return -1;
                        }
                }
                                return -1;
                        }
                }