test/test/sq-space_left: test kernel vs liburing side sync on short submit

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

1 files changed, 105 insertions, 1 deletions

diff --git a/test/sq-space_left.c b/test/sq-space_left.c
index d7baeba..617ce28 100644
--- a/test/sq-space_left.c
+++ b/test/sq-space_left.c
@@ -12,7 +12,7 @@
 
 #include "liburing.h"
 
-int main(int argc, char *argv[])
+static int test_left(void)
 {
 	struct io_uring_sqe *sqe;
 	struct io_uring ring;
@@ -50,3 +50,107 @@ err:
 	io_uring_queue_exit(&ring);
 	return 1;
 }
+
+static int test_sync(void)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring ring;
+	int ret, i;
+
+	ret = io_uring_queue_init(32, &ring, 0);
+	if (ret) {
+		fprintf(stderr, "ring setup failed: %d\n", ret);
+		return 1;
+
+	}
+
+	/* prep 8 NOPS */
+	for (i = 0; i < 8; i++) {
+		sqe = io_uring_get_sqe(&ring);
+		if (!sqe) {
+			fprintf(stderr, "get sqe failed\n");
+			goto err;
+		}
+		io_uring_prep_nop(sqe);
+	}
+
+	/* prep known bad command, this should terminate submission */
+	sqe = io_uring_get_sqe(&ring);
+	if (!sqe) {
+		fprintf(stderr, "get sqe failed\n");
+		goto err;
+	}
+	io_uring_prep_nop(sqe);
+	sqe->opcode = 0xfe;
+
+	/* prep 8 NOPS */
+	for (i = 0; i < 8; i++) {
+		sqe = io_uring_get_sqe(&ring);
+		if (!sqe) {
+			fprintf(stderr, "get sqe failed\n");
+			goto err;
+		}
+		io_uring_prep_nop(sqe);
+	}
+
+	/* we should have 8 + 1 + 8 pending now */
+	ret = io_uring_sq_ready(&ring);
+	if (ret != 17) {
+		fprintf(stderr, "%d ready, wanted 17\n", ret);
+		goto err;
+	}
+
+	ret = io_uring_submit(&ring);
+
+	/* should submit 8 successfully, then error #9 and stop */
+	if (ret != 9) {
+		fprintf(stderr, "submitted %d, wanted 9\n", ret);
+		goto err;
+	}
+
+	/* should now have 8 ready, with 9 gone */
+	ret = io_uring_sq_ready(&ring);
+	if (ret != 8) {
+		fprintf(stderr, "%d ready, wanted 8\n", ret);
+		goto err;
+	}
+
+	ret = io_uring_submit(&ring);
+
+	/* the last 8 should submit fine */
+	if (ret != 8) {
+		fprintf(stderr, "submitted %d, wanted 8\n", ret);
+		goto err;
+	}
+
+	ret = io_uring_sq_ready(&ring);
+	if (ret) {
+		fprintf(stderr, "%d ready, wanted 0\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[])
+{
+	int ret;
+
+	ret = test_left();
+	if (ret) {
+		fprintf(stderr, "test_left failed\n");
+		return ret;
+	}
+
+	ret = test_sync();
+	if (ret) {
+		fprintf(stderr, "test_sync failed\n");
+		return ret;
+	}
+
+	return 0;
+}