Add cross-link

1 files changed, 1524 insertions, 0 deletions

diff --git a/contrib/libs/liburing/test/timeout.c b/contrib/libs/liburing/test/timeout.c
new file mode 100644
index 0000000000..41d8627938
--- /dev/null
+++ b/contrib/libs/liburing/test/timeout.c
@@ -0,0 +1,1524 @@
+#include "../config-host.h"
+/* SPDX-License-Identifier: MIT */
+/*
+ * Description: run various timeout tests
+ *
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "liburing.h"
+#include "../src/syscall.h"
+
+#define TIMEOUT_MSEC	200
+static int not_supported;
+static int no_modify;
+
+static void msec_to_ts(struct __kernel_timespec *ts, unsigned int msec)
+{
+	ts->tv_sec = msec / 1000;
+	ts->tv_nsec = (msec % 1000) * 1000000;
+}
+
+static unsigned long long mtime_since(const struct timeval *s,
+				      const struct timeval *e)
+{
+	long long sec, usec;
+
+	sec = e->tv_sec - s->tv_sec;
+	usec = (e->tv_usec - s->tv_usec);
+	if (sec > 0 && usec < 0) {
+		sec--;
+		usec += 1000000;
+	}
+
+	sec *= 1000;
+	usec /= 1000;
+	return sec + usec;
+}
+
+static unsigned long long mtime_since_now(struct timeval *tv)
+{
+	struct timeval end;
+
+	gettimeofday(&end, NULL);
+	return mtime_since(tv, &end);
+}
+
+/*
+ * Test that we return to userspace if a timeout triggers, even if we
+ * don't satisfy the number of events asked for.
+ */
+static int test_single_timeout_many(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	unsigned long long exp;
+	struct __kernel_timespec ts;
+	struct timeval tv;
+	int ret;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	gettimeofday(&tv, NULL);
+	ret = __sys_io_uring_enter(ring->ring_fd, 0, 4, IORING_ENTER_GETEVENTS,
+					NULL);
+	if (ret < 0) {
+		fprintf(stderr, "%s: io_uring_enter %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	ret = io_uring_wait_cqe(ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+	ret = cqe->res;
+	io_uring_cqe_seen(ring, cqe);
+	if (ret == -EINVAL) {
+		fprintf(stdout, "Timeout not supported, ignored\n");
+		not_supported = 1;
+		return 0;
+	} else if (ret != -ETIME) {
+		fprintf(stderr, "Timeout: %s\n", strerror(-ret));
+		goto err;
+	}
+
+	exp = mtime_since_now(&tv);
+	if (exp >= TIMEOUT_MSEC / 2 && exp <= (TIMEOUT_MSEC * 3) / 2)
+		return 0;
+	fprintf(stderr, "%s: Timeout seems wonky (got %llu)\n", __FUNCTION__, exp);
+err:
+	return 1;
+}
+
+/*
+ * Test numbered trigger of timeout
+ */
+static int test_single_timeout_nr(struct io_uring *ring, int nr)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	struct __kernel_timespec ts;
+	int i, ret;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+	io_uring_prep_timeout(sqe, &ts, nr, 0);
+
+	sqe = io_uring_get_sqe(ring);
+	io_uring_prep_nop(sqe);
+	io_uring_sqe_set_data(sqe, (void *) 1);
+	sqe = io_uring_get_sqe(ring);
+	io_uring_prep_nop(sqe);
+	io_uring_sqe_set_data(sqe, (void *) 1);
+
+	ret = io_uring_submit_and_wait(ring, 3);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	i = 0;
+	while (i < 3) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+
+		ret = cqe->res;
+
+		/*
+		 * NOP commands have user_data as 1. Check that we get the
+		 * at least 'nr' NOPs first, then the successfully removed timeout.
+		 */
+		if (io_uring_cqe_get_data(cqe) == NULL) {
+			if (i < nr) {
+				fprintf(stderr, "%s: timeout received too early\n", __FUNCTION__);
+				goto err;
+			}
+			if (ret) {
+				fprintf(stderr, "%s: timeout triggered by passage of"
+					" time, not by events completed\n", __FUNCTION__);
+				goto err;
+			}
+		}
+
+		io_uring_cqe_seen(ring, cqe);
+		if (ret) {
+			fprintf(stderr, "res: %d\n", ret);
+			goto err;
+		}
+		i++;
+	};
+
+	return 0;
+err:
+	return 1;
+}
+
+static int test_single_timeout_wait(struct io_uring *ring,
+				    struct io_uring_params *p)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	struct __kernel_timespec ts;
+	int i, ret;
+
+	sqe = io_uring_get_sqe(ring);
+	io_uring_prep_nop(sqe);
+	io_uring_sqe_set_data(sqe, (void *) 1);
+
+	sqe = io_uring_get_sqe(ring);
+	io_uring_prep_nop(sqe);
+	io_uring_sqe_set_data(sqe, (void *) 1);
+
+	/* no implied submit for newer kernels */
+	if (p->features & IORING_FEAT_EXT_ARG) {
+		ret = io_uring_submit(ring);
+		if (ret != 2) {
+			fprintf(stderr, "%s: submit %d\n", __FUNCTION__, ret);
+			return 1;
+		}
+	}
+
+	msec_to_ts(&ts, 1000);
+
+	i = 0;
+	do {
+		ret = io_uring_wait_cqes(ring, &cqe, 2, &ts, NULL);
+		if (ret == -ETIME)
+			break;
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait timeout failed: %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+
+		ret = cqe->res;
+		io_uring_cqe_seen(ring, cqe);
+		if (ret < 0) {
+			fprintf(stderr, "res: %d\n", ret);
+			goto err;
+		}
+		i++;
+	} while (1);
+
+	if (i != 2) {
+		fprintf(stderr, "got %d completions\n", i);
+		goto err;
+	}
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test single timeout waking us up
+ */
+static int test_single_timeout(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	unsigned long long exp;
+	struct __kernel_timespec ts;
+	struct timeval tv;
+	int ret;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	gettimeofday(&tv, NULL);
+	ret = io_uring_wait_cqe(ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+	ret = cqe->res;
+	io_uring_cqe_seen(ring, cqe);
+	if (ret == -EINVAL) {
+		fprintf(stdout, "%s: Timeout not supported, ignored\n", __FUNCTION__);
+		not_supported = 1;
+		return 0;
+	} else if (ret != -ETIME) {
+		fprintf(stderr, "%s: Timeout: %s\n", __FUNCTION__, strerror(-ret));
+		goto err;
+	}
+
+	exp = mtime_since_now(&tv);
+	if (exp >= TIMEOUT_MSEC / 2 && exp <= (TIMEOUT_MSEC * 3) / 2)
+		return 0;
+	fprintf(stderr, "%s: Timeout seems wonky (got %llu)\n", __FUNCTION__, exp);
+err:
+	return 1;
+}
+
+static int test_single_timeout_remove_notfound(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	struct __kernel_timespec ts;
+	int ret, i;
+
+	if (no_modify)
+		return 0;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+	io_uring_prep_timeout(sqe, &ts, 2, 0);
+	sqe->user_data = 1;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	io_uring_prep_timeout_remove(sqe, 2, 0);
+	sqe->user_data = 2;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	/*
+	 * We should get two completions. One is our modify request, which should
+	 * complete with -ENOENT. The other is the timeout that will trigger after
+	 * TIMEOUT_MSEC.
+	 */
+	for (i = 0; i < 2; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+		if (cqe->user_data == 2) {
+			if (cqe->res != -ENOENT) {
+				fprintf(stderr, "%s: modify ret %d, wanted ENOENT\n", __FUNCTION__, cqe->res);
+				break;
+			}
+		} else if (cqe->user_data == 1) {
+			if (cqe->res != -ETIME) {
+				fprintf(stderr, "%s: timeout ret %d, wanted -ETIME\n", __FUNCTION__, cqe->res);
+				break;
+			}
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+	return 0;
+err:
+	return 1;
+}
+
+static int test_single_timeout_remove(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	struct __kernel_timespec ts;
+	int ret, i;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 1;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	io_uring_prep_timeout_remove(sqe, 1, 0);
+	sqe->user_data = 2;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	/*
+	 * We should have two completions ready. One is for the original timeout
+	 * request, user_data == 1, that should have a ret of -ECANCELED. The other
+	 * is for our modify request, user_data == 2, that should have a ret of 0.
+	 */
+	for (i = 0; i < 2; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+		if (no_modify)
+			goto seen;
+		if (cqe->res == -EINVAL && cqe->user_data == 2) {
+			fprintf(stdout, "Timeout modify not supported, ignoring\n");
+			no_modify = 1;
+			goto seen;
+		}
+		if (cqe->user_data == 1) {
+			if (cqe->res != -ECANCELED) {
+				fprintf(stderr, "%s: timeout ret %d, wanted canceled\n", __FUNCTION__, cqe->res);
+				break;
+			}
+		} else if (cqe->user_data == 2) {
+			if (cqe->res) {
+				fprintf(stderr, "%s: modify ret %d, wanted 0\n", __FUNCTION__, cqe->res);
+				break;
+			}
+		}
+seen:
+		io_uring_cqe_seen(ring, cqe);
+	}
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test single absolute timeout waking us up
+ */
+static int test_single_timeout_abs(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	unsigned long long exp;
+	struct __kernel_timespec ts;
+	struct timespec abs_ts;
+	struct timeval tv;
+	int ret;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	clock_gettime(CLOCK_MONOTONIC, &abs_ts);
+	ts.tv_sec = abs_ts.tv_sec + 1;
+	ts.tv_nsec = abs_ts.tv_nsec;
+	io_uring_prep_timeout(sqe, &ts, 0, IORING_TIMEOUT_ABS);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	gettimeofday(&tv, NULL);
+	ret = io_uring_wait_cqe(ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+	ret = cqe->res;
+	io_uring_cqe_seen(ring, cqe);
+	if (ret == -EINVAL) {
+		fprintf(stdout, "Absolute timeouts not supported, ignored\n");
+		return 0;
+	} else if (ret != -ETIME) {
+		fprintf(stderr, "Timeout: %s\n", strerror(-ret));
+		goto err;
+	}
+
+	exp = mtime_since_now(&tv);
+	if (exp >= 1000 / 2 && exp <= (1000 * 3) / 2)
+		return 0;
+	fprintf(stderr, "%s: Timeout seems wonky (got %llu)\n", __FUNCTION__, exp);
+err:
+	return 1;
+}
+
+/*
+ * Test that timeout is canceled on exit
+ */
+static int test_single_timeout_exit(struct io_uring *ring)
+{
+	struct io_uring_sqe *sqe;
+	struct __kernel_timespec ts;
+	int ret;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+
+	msec_to_ts(&ts, 30000);
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	io_uring_queue_exit(ring);
+	return 0;
+err:
+	io_uring_queue_exit(ring);
+	return 1;
+}
+
+/*
+ * Test multi timeouts waking us up
+ */
+static int test_multi_timeout(struct io_uring *ring)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts[2];
+	unsigned int timeout[2];
+	unsigned long long exp;
+	struct timeval tv;
+	int ret, i;
+
+	/* req_1: timeout req, count = 1, time = (TIMEOUT_MSEC * 2) */
+	timeout[0] = TIMEOUT_MSEC * 2;
+	msec_to_ts(&ts[0], timeout[0]);
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts[0], 1, 0);
+	sqe->user_data = 1;
+
+	/* req_2: timeout req, count = 1, time = TIMEOUT_MSEC */
+	timeout[1] = TIMEOUT_MSEC;
+	msec_to_ts(&ts[1], timeout[1]);
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts[1], 1, 0);
+	sqe->user_data = 2;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	gettimeofday(&tv, NULL);
+	for (i = 0; i < 2; i++) {
+		unsigned int time = 0;
+		__u64 user_data = 0;
+
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+
+		/*
+		 * Both of these two reqs should timeout, but req_2 should
+		 * return before req_1.
+		 */
+		switch (i) {
+		case 0:
+			user_data = 2;
+			time = timeout[1];
+			break;
+		case 1:
+			user_data = 1;
+			time = timeout[0];
+			break;
+		}
+
+		if (cqe->user_data != user_data) {
+			fprintf(stderr, "%s: unexpected timeout req %d sequence\n",
+				__FUNCTION__, i+1);
+			goto err;
+		}
+		if (cqe->res != -ETIME) {
+			fprintf(stderr, "%s: Req %d timeout: %s\n",
+				__FUNCTION__, i+1, strerror(cqe->res));
+			goto err;
+		}
+		exp = mtime_since_now(&tv);
+		if (exp < time / 2 || exp > (time * 3) / 2) {
+			fprintf(stderr, "%s: Req %d timeout seems wonky (got %llu)\n",
+				__FUNCTION__, i+1, exp);
+			goto err;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test multi timeout req with different count
+ */
+static int test_multi_timeout_nr(struct io_uring *ring)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	int ret, i;
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+
+	/* req_1: timeout req, count = 2 */
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 2, 0);
+	sqe->user_data = 1;
+
+	/* req_2: timeout req, count = 1 */
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 1, 0);
+	sqe->user_data = 2;
+
+	/* req_3: nop req */
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_nop(sqe);
+	io_uring_sqe_set_data(sqe, (void *) 1);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	/*
+	 * req_2 (count=1) should return without error and req_1 (count=2)
+	 * should timeout.
+	 */
+	for (i = 0; i < 3; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+
+		switch (i) {
+		case 0:
+			/* Should be nop req */
+			if (io_uring_cqe_get_data(cqe) != (void *) 1) {
+				fprintf(stderr, "%s: nop not seen as 1 or 2\n", __FUNCTION__);
+				goto err;
+			}
+			break;
+		case 1:
+			/* Should be timeout req_2 */
+			if (cqe->user_data != 2) {
+				fprintf(stderr, "%s: unexpected timeout req %d sequence\n",
+					__FUNCTION__, i+1);
+				goto err;
+			}
+			if (cqe->res < 0) {
+				fprintf(stderr, "%s: Req %d res %d\n",
+					__FUNCTION__, i+1, cqe->res);
+				goto err;
+			}
+			break;
+		case 2:
+			/* Should be timeout req_1 */
+			if (cqe->user_data != 1) {
+				fprintf(stderr, "%s: unexpected timeout req %d sequence\n",
+					__FUNCTION__, i+1);
+				goto err;
+			}
+			if (cqe->res != -ETIME) {
+				fprintf(stderr, "%s: Req %d timeout: %s\n",
+					__FUNCTION__, i+1, strerror(cqe->res));
+				goto err;
+			}
+			break;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test timeout <link> timeout <drain> timeout
+ */
+static int test_timeout_flags1(struct io_uring *ring)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	int ret, i;
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 1;
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 2;
+	sqe->flags |= IOSQE_IO_DRAIN;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 3;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	for (i = 0; i < 3; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+
+		if (cqe->res == -EINVAL) {
+			if (!i)
+				fprintf(stdout, "%s: timeout flags not supported\n",
+						__FUNCTION__);
+			io_uring_cqe_seen(ring, cqe);
+			continue;
+		}
+
+		switch (cqe->user_data) {
+		case 1:
+			if (cqe->res != -ETIME) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res, -ETIME);
+				goto err;
+			}
+			break;
+		case 2:
+			if (cqe->res != -ECANCELED) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res,
+						-ECANCELED);
+				goto err;
+			}
+			break;
+		case 3:
+			if (cqe->res != -ETIME) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res, -ETIME);
+				goto err;
+			}
+			break;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test timeout <link> timeout <link> timeout
+ */
+static int test_timeout_flags2(struct io_uring *ring)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	int ret, i;
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 1;
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 2;
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 3;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	for (i = 0; i < 3; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+
+		if (cqe->res == -EINVAL) {
+			if (!i)
+				fprintf(stdout, "%s: timeout flags not supported\n",
+						__FUNCTION__);
+			io_uring_cqe_seen(ring, cqe);
+			continue;
+		}
+
+		switch (cqe->user_data) {
+		case 1:
+			if (cqe->res != -ETIME) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res, -ETIME);
+				goto err;
+			}
+			break;
+		case 2:
+		case 3:
+			if (cqe->res != -ECANCELED) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res,
+						-ECANCELED);
+				goto err;
+			}
+			break;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test timeout <drain> timeout <link> timeout
+ */
+static int test_timeout_flags3(struct io_uring *ring)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	int ret, i;
+
+	msec_to_ts(&ts, TIMEOUT_MSEC);
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 1;
+	sqe->flags |= IOSQE_IO_DRAIN;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 2;
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 3;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	for (i = 0; i < 3; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+
+		if (cqe->res == -EINVAL) {
+			if (!i)
+				fprintf(stdout, "%s: timeout flags not supported\n",
+						__FUNCTION__);
+			io_uring_cqe_seen(ring, cqe);
+			continue;
+		}
+
+		switch (cqe->user_data) {
+		case 1:
+		case 2:
+			if (cqe->res != -ETIME) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res, -ETIME);
+				goto err;
+			}
+			break;
+		case 3:
+			if (cqe->res != -ECANCELED) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res,
+						-ECANCELED);
+				goto err;
+			}
+			break;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+static int test_update_timeout(struct io_uring *ring, unsigned long ms,
+				bool abs, bool async, bool linked)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts, ts_upd;
+	unsigned long long exp_ms, base_ms = 10000;
+	struct timeval tv;
+	int ret, i, nr = 2;
+	__u32 mode = abs ? IORING_TIMEOUT_ABS : 0;
+
+	msec_to_ts(&ts_upd, ms);
+	gettimeofday(&tv, NULL);
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	msec_to_ts(&ts, base_ms);
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->user_data = 1;
+
+	if (linked) {
+		sqe = io_uring_get_sqe(ring);
+		if (!sqe) {
+			fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+			goto err;
+		}
+		io_uring_prep_nop(sqe);
+		sqe->user_data = 3;
+		sqe->flags = IOSQE_IO_LINK;
+		if (async)
+			sqe->flags |= IOSQE_ASYNC;
+		nr++;
+	}
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout_update(sqe, &ts_upd, 1, mode);
+	sqe->user_data = 2;
+	if (async)
+		sqe->flags |= IOSQE_ASYNC;
+
+	ret = io_uring_submit(ring);
+	if (ret != nr) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	for (i = 0; i < nr; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+			goto err;
+		}
+
+		switch (cqe->user_data) {
+		case 1:
+			if (cqe->res != -ETIME) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res, -ETIME);
+				goto err;
+			}
+			break;
+		case 2:
+			if (cqe->res != 0) {
+				fprintf(stderr, "%s: got %d, wanted %d\n",
+						__FUNCTION__, cqe->res,
+						0);
+				goto err;
+			}
+			break;
+		case 3:
+			if (cqe->res != 0) {
+				fprintf(stderr, "nop failed\n");
+				goto err;
+			}
+			break;
+		default:
+			goto err;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	exp_ms = mtime_since_now(&tv);
+	if (exp_ms >= base_ms / 2) {
+		fprintf(stderr, "too long, timeout wasn't updated\n");
+		goto err;
+	}
+	if (ms >= 1000 && !abs && exp_ms < ms / 2) {
+		fprintf(stderr, "fired too early, potentially updated to 0 ms"
+					"instead of %lu\n", ms);
+		goto err;
+	}
+	return 0;
+err:
+	return 1;
+}
+
+static int test_update_nonexistent_timeout(struct io_uring *ring)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	int ret;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	msec_to_ts(&ts, 0);
+	io_uring_prep_timeout_update(sqe, &ts, 42, 0);
+
+	ret = io_uring_submit(ring);
+	if (ret != 1) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	ret = io_uring_wait_cqe(ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	ret = cqe->res;
+	if (ret == -ENOENT)
+		ret = 0;
+	io_uring_cqe_seen(ring, cqe);
+	return ret;
+err:
+	return 1;
+}
+
+static int test_update_invalid_flags(struct io_uring *ring)
+{
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	int ret;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	io_uring_prep_timeout_remove(sqe, 0, IORING_TIMEOUT_ABS);
+
+	ret = io_uring_submit(ring);
+	if (ret != 1) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	ret = io_uring_wait_cqe(ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+	if (cqe->res != -EINVAL) {
+		fprintf(stderr, "%s: got %d, wanted %d\n",
+				__FUNCTION__, cqe->res, -EINVAL);
+		goto err;
+	}
+	io_uring_cqe_seen(ring, cqe);
+
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
+		goto err;
+	}
+	msec_to_ts(&ts, 0);
+	io_uring_prep_timeout_update(sqe, &ts, 0, -1);
+
+	ret = io_uring_submit(ring);
+	if (ret != 1) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+
+	ret = io_uring_wait_cqe(ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+		goto err;
+	}
+	if (cqe->res != -EINVAL) {
+		fprintf(stderr, "%s: got %d, wanted %d\n",
+				__FUNCTION__, cqe->res, -EINVAL);
+		goto err;
+	}
+	io_uring_cqe_seen(ring, cqe);
+
+	return 0;
+err:
+	return 1;
+}
+
+static int fill_exec_target(char *dst, char *path)
+{
+	struct stat sb;
+
+	/*
+	 * Should either be ./exec-target.t or test/exec-target.t
+	 */
+	sprintf(dst, "%s", path);
+	return stat(dst, &sb);
+}
+
+static int test_timeout_link_cancel(void)
+{
+	struct io_uring ring;
+	struct io_uring_cqe *cqe;
+	char prog_path[PATH_MAX];
+	pid_t p;
+	int ret, i, wstatus;
+
+	if (fill_exec_target(prog_path, "./exec-target.t") &&
+	    fill_exec_target(prog_path, "test/exec-target.t")) {
+		fprintf(stdout, "Can't find exec-target, skipping\n");
+		return 0;
+	}
+
+	ret = io_uring_queue_init(8, &ring, 0);
+	if (ret) {
+		fprintf(stderr, "ring create failed: %d\n", ret);
+		return 1;
+	}
+
+	p = fork();
+	if (p == -1) {
+		fprintf(stderr, "fork() failed\n");
+		return 1;
+	}
+
+	if (p == 0) {
+		struct io_uring_sqe *sqe;
+		struct __kernel_timespec ts;
+
+		msec_to_ts(&ts, 10000);
+		sqe = io_uring_get_sqe(&ring);
+		io_uring_prep_timeout(sqe, &ts, 0, 0);
+		sqe->flags |= IOSQE_IO_LINK;
+		sqe->user_data = 0;
+
+		sqe = io_uring_get_sqe(&ring);
+		io_uring_prep_nop(sqe);
+		sqe->user_data = 1;
+
+		ret = io_uring_submit(&ring);
+		if (ret != 2) {
+			fprintf(stderr, "%s: got %d, wanted 1\n", __FUNCTION__, ret);
+			exit(1);
+		}
+
+		/* trigger full cancellation */
+		ret = execl(prog_path, prog_path, NULL);
+		if (ret) {
+			fprintf(stderr, "exec failed %i\n", errno);
+			exit(1);
+		}
+		exit(0);
+	}
+
+	if (waitpid(p, &wstatus, 0) == (pid_t)-1) {
+		perror("waitpid()");
+		return 1;
+	}
+	if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus)) {
+		fprintf(stderr, "child failed %i\n", WEXITSTATUS(wstatus));
+		return 1;
+	}
+
+	for (i = 0; i < 2; ++i) {
+		ret = io_uring_wait_cqe(&ring, &cqe);
+		if (ret) {
+			fprintf(stderr, "wait_cqe=%d\n", ret);
+			return 1;
+		}
+		if (cqe->res != -ECANCELED) {
+			fprintf(stderr, "invalid result, user_data: %i res: %i\n",
+					(int)cqe->user_data, cqe->res);
+			return 1;
+		}
+		io_uring_cqe_seen(&ring, cqe);
+	}
+
+	io_uring_queue_exit(&ring);
+	return 0;
+}
+
+
+static int test_not_failing_links(void)
+{
+	struct io_uring ring;
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct __kernel_timespec ts;
+	int ret;
+
+	ret = io_uring_queue_init(8, &ring, 0);
+	if (ret) {
+		fprintf(stderr, "ring create failed: %d\n", ret);
+		return 1;
+	}
+
+	msec_to_ts(&ts, 1);
+	sqe = io_uring_get_sqe(&ring);
+	io_uring_prep_timeout(sqe, &ts, 0, IORING_TIMEOUT_ETIME_SUCCESS);
+	sqe->user_data = 1;
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(&ring);
+	io_uring_prep_nop(sqe);
+	sqe->user_data = 2;
+
+	ret = io_uring_submit(&ring);
+	if (ret != 2) {
+		fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
+		return 1;
+	}
+
+	ret = io_uring_wait_cqe(&ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+		return 1;
+	} else if (cqe->user_data == 1 && cqe->res == -EINVAL) {
+		fprintf(stderr, "ETIME_SUCCESS is not supported, skip\n");
+		goto done;
+	} else if (cqe->res != -ETIME || cqe->user_data != 1) {
+		fprintf(stderr, "timeout failed %i %i\n", cqe->res,
+				(int)cqe->user_data);
+		return 1;
+	}
+	io_uring_cqe_seen(&ring, cqe);
+
+	ret = io_uring_wait_cqe(&ring, &cqe);
+	if (ret < 0) {
+		fprintf(stderr, "%s: wait completion %d\n", __FUNCTION__, ret);
+		return 1;
+	} else if (cqe->res || cqe->user_data != 2) {
+		fprintf(stderr, "nop failed %i %i\n", cqe->res,
+				(int)cqe->user_data);
+		return 1;
+	}
+done:
+	io_uring_cqe_seen(&ring, cqe);
+	io_uring_queue_exit(&ring);
+	return 0;
+}
+
+
+int main(int argc, char *argv[])
+{
+	struct io_uring ring, sqpoll_ring;
+	bool has_timeout_update, sqpoll;
+	struct io_uring_params p = { };
+	int ret;
+
+	if (argc > 1)
+		return 0;
+
+	ret = io_uring_queue_init_params(8, &ring, &p);
+	if (ret) {
+		fprintf(stderr, "ring setup failed\n");
+		return 1;
+	}
+
+	ret = io_uring_queue_init(8, &sqpoll_ring, IORING_SETUP_SQPOLL);
+	sqpoll = !ret;
+
+	ret = test_single_timeout(&ring);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout failed\n");
+		return ret;
+	}
+	if (not_supported)
+		return 0;
+
+	ret = test_multi_timeout(&ring);
+	if (ret) {
+		fprintf(stderr, "test_multi_timeout failed\n");
+		return ret;
+	}
+
+	ret = test_single_timeout_abs(&ring);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout_abs failed\n");
+		return ret;
+	}
+
+	ret = test_single_timeout_remove(&ring);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout_remove failed\n");
+		return ret;
+	}
+
+	ret = test_single_timeout_remove_notfound(&ring);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout_remove_notfound failed\n");
+		return ret;
+	}
+
+	ret = test_single_timeout_many(&ring);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout_many failed\n");
+		return ret;
+	}
+
+	ret = test_single_timeout_nr(&ring, 1);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout_nr(1) failed\n");
+		return ret;
+	}
+	ret = test_single_timeout_nr(&ring, 2);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout_nr(2) failed\n");
+		return ret;
+	}
+
+	ret = test_multi_timeout_nr(&ring);
+	if (ret) {
+		fprintf(stderr, "test_multi_timeout_nr failed\n");
+		return ret;
+	}
+
+	ret = test_timeout_flags1(&ring);
+	if (ret) {
+		fprintf(stderr, "test_timeout_flags1 failed\n");
+		return ret;
+	}
+
+	ret = test_timeout_flags2(&ring);
+	if (ret) {
+		fprintf(stderr, "test_timeout_flags2 failed\n");
+		return ret;
+	}
+
+	ret = test_timeout_flags3(&ring);
+	if (ret) {
+		fprintf(stderr, "test_timeout_flags3 failed\n");
+		return ret;
+	}
+
+	ret = test_single_timeout_wait(&ring, &p);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout_wait failed\n");
+		return ret;
+	}
+
+	/* io_uring_wait_cqes() may have left a timeout, reinit ring */
+	io_uring_queue_exit(&ring);
+	ret = io_uring_queue_init(8, &ring, 0);
+	if (ret) {
+		fprintf(stderr, "ring setup failed\n");
+		return 1;
+	}
+
+	ret = test_update_nonexistent_timeout(&ring);
+	has_timeout_update = (ret != -EINVAL);
+	if (has_timeout_update) {
+		if (ret) {
+			fprintf(stderr, "test_update_nonexistent_timeout failed\n");
+			return ret;
+		}
+
+		ret = test_update_invalid_flags(&ring);
+		if (ret) {
+			fprintf(stderr, "test_update_invalid_flags failed\n");
+			return ret;
+		}
+
+		ret = test_update_timeout(&ring, 0, false, false, false);
+		if (ret) {
+			fprintf(stderr, "test_update_timeout failed\n");
+			return ret;
+		}
+
+		ret = test_update_timeout(&ring, 1, false, false, false);
+		if (ret) {
+			fprintf(stderr, "test_update_timeout 1ms failed\n");
+			return ret;
+		}
+
+		ret = test_update_timeout(&ring, 1000, false, false, false);
+		if (ret) {
+			fprintf(stderr, "test_update_timeout 1s failed\n");
+			return ret;
+		}
+
+		ret = test_update_timeout(&ring, 0, true, true, false);
+		if (ret) {
+			fprintf(stderr, "test_update_timeout abs failed\n");
+			return ret;
+		}
+
+
+		ret = test_update_timeout(&ring, 0, false, true, false);
+		if (ret) {
+			fprintf(stderr, "test_update_timeout async failed\n");
+			return ret;
+		}
+
+		ret = test_update_timeout(&ring, 0, false, false, true);
+		if (ret) {
+			fprintf(stderr, "test_update_timeout linked failed\n");
+			return ret;
+		}
+
+		if (sqpoll) {
+			ret = test_update_timeout(&sqpoll_ring, 0, false, false,
+						  false);
+			if (ret) {
+				fprintf(stderr, "test_update_timeout sqpoll"
+						"failed\n");
+				return ret;
+			}
+		}
+	}
+
+	/*
+	 * this test must go last, it kills the ring
+	 */
+	ret = test_single_timeout_exit(&ring);
+	if (ret) {
+		fprintf(stderr, "test_single_timeout_exit failed\n");
+		return ret;
+	}
+
+	ret = test_timeout_link_cancel();
+	if (ret) {
+		fprintf(stderr, "test_timeout_link_cancel failed\n");
+		return ret;
+	}
+
+	ret = test_not_failing_links();
+	if (ret) {
+		fprintf(stderr, "test_not_failing_links failed\n");
+		return ret;
+	}
+
+	if (sqpoll)
+		io_uring_queue_exit(&sqpoll_ring);
+	return 0;
+}