Test wait after under-consuming
In case of an error submission won't consume all sqes. This tests that
it will get back to the userspace even if (to_submit == to_wait)
@@ -384,6 +384,50 @@ err:
return 1;
}
+static int test_early_fail_and_wait(void)
+{
+ struct io_uring ring;
+ struct io_uring_sqe *sqe;
+ int ret, invalid_fd = 42;
+ struct iovec iov = { .iov_base = NULL, .iov_len = 0 };
+
+ /* create a new ring as it leaves it dirty */
+ ret = io_uring_queue_init(8, &ring, 0);
+ if (ret) {
+ printf("ring setup failed\n");
+ return 1;
+ }
+
+ sqe = io_uring_get_sqe(&ring);
+ if (!sqe) {
+ printf("get sqe failed\n");
+ goto err;
+ }
+
+ io_uring_prep_readv(sqe, invalid_fd, &iov, 1, 0);
+ sqe->flags |= IOSQE_IO_LINK;
+
+ sqe = io_uring_get_sqe(&ring);
+ if (!sqe) {
+ printf("get sqe failed\n");
+ goto err;
+ }
+
+ io_uring_prep_nop(sqe);
+
+ ret = io_uring_submit_and_wait(&ring, 2);
+ if (ret <= 0 && ret != -EAGAIN) {
+ printf("sqe submit failed: %d\n", ret);
+ goto err;
+ }
+
+ io_uring_queue_exit(&ring);
+ return 0;
+err:
+ io_uring_queue_exit(&ring);
+ return 1;
+}
+
int main(int argc, char *argv[])
{
struct io_uring ring, poll_ring;
@@ -400,7 +444,6 @@ int main(int argc, char *argv[])
if (ret) {
printf("poll_ring setup failed\n");
return 1;
-
}
ret = test_single_link(&ring);
@@ -439,5 +482,11 @@ int main(int argc, char *argv[])
return ret;
}
+ ret = test_early_fail_and_wait();
+ if (ret) {
+ fprintf(stderr, "test_early_fail_and_wait\n");
+ return ret;
+ }
+
return 0;
}
