Add cross-link

1 files changed, 205 insertions, 0 deletions

diff --git a/contrib/libs/liburing/test/timeout-overflow.c b/contrib/libs/liburing/test/timeout-overflow.c
new file mode 100644
index 0000000000..8c57ff31b1
--- /dev/null
+++ b/contrib/libs/liburing/test/timeout-overflow.c
@@ -0,0 +1,205 @@
+#include "../config-host.h"
+/* SPDX-License-Identifier: MIT */
+/*
+ * Description: run timeout overflow test
+ *
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <limits.h>
+#include <string.h>
+#include <sys/time.h>
+
+#include "liburing.h"
+#include "helpers.h"
+
+#define TIMEOUT_MSEC	200
+static int not_supported;
+
+static void msec_to_ts(struct __kernel_timespec *ts, unsigned int msec)
+{
+	ts->tv_sec = msec / 1000;
+	ts->tv_nsec = (msec % 1000) * 1000000;
+}
+
+static int check_timeout_support(void)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	struct io_uring_params p;
+	struct io_uring ring;
+	int ret;
+
+	memset(&p, 0, sizeof(p));
+	ret = io_uring_queue_init_params(1, &ring, &p);
+	if (ret) {
+		fprintf(stderr, "ring setup failed: %d\n", ret);
+		return T_EXIT_FAIL;
+	}
+
+	/* not really a match, but same kernel added batched completions */
+	if (p.features & IORING_FEAT_POLL_32BITS) {
+		not_supported = 1;
+		return T_EXIT_SKIP;
+	}
+
+	sqe = io_uring_get_sqe(&ring);
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+	io_uring_prep_timeout(sqe, &ts, 1, 0);
+
+	ret = io_uring_submit(&ring);
+	if (ret < 0) {
+		fprintf(stderr, "sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	ret = io_uring_wait_cqe(&ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "wait completion %d\n", ret);
+		goto err;
+	}
+
+	if (cqe->res == -EINVAL) {
+		not_supported = 1;
+		fprintf(stdout, "Timeout not supported, ignored\n");
+		return 0;
+	}
+
+	io_uring_cqe_seen(&ring, cqe);
+	io_uring_queue_exit(&ring);
+	return T_EXIT_PASS;
+err:
+	io_uring_queue_exit(&ring);
+	return T_EXIT_FAIL;
+}
+
+/*
+ * We first setup 4 timeout requests, which require a count value of 1, 1, 2,
+ * UINT_MAX, so the sequence is 1, 2, 4, 2. Before really timeout, this 4
+ * requests will not lead the change of cq_cached_tail, so as sq_dropped.
+ *
+ * And before this patch. The order of this four requests will be req1->req2->
+ * req4->req3. Actually, it should be req1->req2->req3->req4.
+ *
+ * Then, if there is 2 nop req. All timeout requests expect req4 will completed
+ * successful after the patch. And req1/req2 will completed successful with
+ * req3/req4 return -ETIME without this patch!
+ */
+static int test_timeout_overflow(void)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	struct io_uring ring;
+	int i, ret;
+
+	ret = io_uring_queue_init(16, &ring, 0);
+	if (ret) {
+		fprintf(stderr, "ring setup failed: %d\n", ret);
+		return 1;
+	}
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+	for (i = 0; i < 4; i++) {
+		unsigned num = 0;
+		sqe = io_uring_get_sqe(&ring);
+		switch (i) {
+		case 0:
+		case 1:
+			num = 1;
+			break;
+		case 2:
+			num = 2;
+			break;
+		case 3:
+			num = UINT_MAX;
+			break;
+		}
+		io_uring_prep_timeout(sqe, &ts, num, 0);
+	}
+
+	for (i = 0; i < 2; i++) {
+		sqe = io_uring_get_sqe(&ring);
+		io_uring_prep_nop(sqe);
+		io_uring_sqe_set_data(sqe, (void *) 1);
+	}
+	ret = io_uring_submit(&ring);
+	if (ret < 0) {
+		fprintf(stderr, "sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	i = 0;
+	while (i < 6) {
+		ret = io_uring_wait_cqe(&ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "wait completion %d\n", ret);
+			goto err;
+		}
+
+		/*
+		 * cqe1: first nop req
+		 * cqe2: first timeout req, because of cqe1
+		 * cqe3: second timeout req because of cqe1 + cqe2
+		 * cqe4: second nop req
+		 * cqe5~cqe6: the left three timeout req
+		 */
+		switch (i) {
+		case 0:
+		case 3:
+			if (io_uring_cqe_get_data(cqe) != (void *) 1) {
+				fprintf(stderr, "nop not seen as 1 or 2\n");
+				goto err;
+			}
+			break;
+		case 1:
+		case 2:
+		case 4:
+			if (cqe->res == -ETIME) {
+				fprintf(stderr, "expected not return -ETIME "
+					"for the #%d timeout req\n", i - 1);
+				goto err;
+			}
+			break;
+		case 5:
+			if (cqe->res != -ETIME) {
+				fprintf(stderr, "expected return -ETIME for "
+					"the #%d timeout req\n", i - 1);
+				goto err;
+			}
+			break;
+		}
+		io_uring_cqe_seen(&ring, cqe);
+		i++;
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+int main(int argc, char *argv[])
+{
+	int ret;
+
+	if (argc > 1)
+		return T_EXIT_SKIP;
+
+	ret = check_timeout_support();
+	if (ret == T_EXIT_FAIL) {
+		fprintf(stderr, "check_timeout_support failed: %d\n", ret);
+		return T_EXIT_FAIL;
+	}
+
+	if (not_supported)
+		return T_EXIT_SKIP;
+
+	ret = test_timeout_overflow();
+	if (ret) {
+		fprintf(stderr, "test_timeout_overflow failed\n");
+		return T_EXIT_FAIL;
+	}
+
+	return T_EXIT_PASS;
+}