Add cross-link

1 files changed, 238 insertions, 0 deletions

diff --git a/contrib/libs/liburing/test/submit-reuse.c b/contrib/libs/liburing/test/submit-reuse.c
new file mode 100644
index 00000000000..92f6b2f5d03
--- /dev/null
+++ b/contrib/libs/liburing/test/submit-reuse.c
@@ -0,0 +1,238 @@
+#include "../config-host.h"
+/* SPDX-License-Identifier: MIT */
+/*
+ * Test reads that will punt to blocking context, with immediate overwrite
+ * of iovec->iov_base to NULL. If the kernel doesn't properly handle
+ * reuse of the iovec, we should get -EFAULT.
+ */
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <sys/time.h>
+
+#include "helpers.h"
+#include "liburing.h"
+
+#define STR_SIZE	32768
+#define FILE_SIZE	65536
+
+struct thread_data {
+	int fd1, fd2;
+	volatile int do_exit;
+};
+
+static void *flusher(void *__data)
+{
+	struct thread_data *data = __data;
+
+	while (!data->do_exit) {
+		posix_fadvise(data->fd1, 0, FILE_SIZE, POSIX_FADV_DONTNEED);
+		posix_fadvise(data->fd2, 0, FILE_SIZE, POSIX_FADV_DONTNEED);
+		usleep(10);
+	}
+
+	return NULL;
+}
+
+static char str1[STR_SIZE];
+static char str2[STR_SIZE];
+
+static struct io_uring ring;
+
+static int no_stable;
+
+static int prep(int fd, char *str, int split, int async)
+{
+	struct io_uring_sqe *sqe;
+	struct iovec iovs[16];
+	int ret, i;
+
+	if (split) {
+		int vsize = STR_SIZE / 16;
+		void *ptr = str;
+
+		for (i = 0; i < 16; i++) {
+			iovs[i].iov_base = ptr;
+			iovs[i].iov_len = vsize;
+			ptr += vsize;
+		}
+	} else {
+		iovs[0].iov_base = str;
+		iovs[0].iov_len = STR_SIZE;
+	}
+
+	sqe = io_uring_get_sqe(&ring);
+	io_uring_prep_readv(sqe, fd, iovs, split ? 16 : 1, 0);
+	sqe->user_data = fd;
+	if (async)
+		sqe->flags = IOSQE_ASYNC;
+	ret = io_uring_submit(&ring);
+	if (ret != 1) {
+		fprintf(stderr, "submit got %d\n", ret);
+		return 1;
+	}
+	if (split) {
+		for (i = 0; i < 16; i++)
+			iovs[i].iov_base = NULL;
+	} else {
+		iovs[0].iov_base = NULL;
+	}
+	return 0;
+}
+
+static int wait_nr(int nr)
+{
+	int i, ret;
+
+	for (i = 0; i < nr; i++) {
+		struct io_uring_cqe *cqe;
+
+		ret = io_uring_wait_cqe(&ring, &cqe);
+		if (ret)
+			return ret;
+		if (cqe->res < 0) {
+			fprintf(stderr, "cqe->res=%d\n", cqe->res);
+			return 1;
+		}
+		io_uring_cqe_seen(&ring, cqe);
+	}
+
+	return 0;
+}
+
+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);
+}
+
+static int test_reuse(int argc, char *argv[], int split, int async)
+{
+	struct thread_data data;
+	struct io_uring_params p = { };
+	int fd1, fd2, ret, i;
+	struct timeval tv;
+	pthread_t thread;
+	char *fname1 = ".reuse.1";
+	int do_unlink = 1;
+	void *tret;
+
+	ret = io_uring_queue_init_params(32, &ring, &p);
+	if (ret) {
+		fprintf(stderr, "io_uring_queue_init: %d\n", ret);
+		return 1;
+	}
+
+	if (!(p.features & IORING_FEAT_SUBMIT_STABLE)) {
+		fprintf(stdout, "FEAT_SUBMIT_STABLE not there, skipping\n");
+		io_uring_queue_exit(&ring);
+		no_stable = 1;
+		return 0;
+	}
+
+	if (argc > 1) {
+		fname1 = argv[1];
+		do_unlink = 0;
+	} else {
+		t_create_file(fname1, FILE_SIZE);
+	}
+
+	fd1 = open(fname1, O_RDONLY);
+	if (do_unlink)
+		unlink(fname1);
+	if (fd1 < 0) {
+		perror("open fname1");
+		goto err;
+	}
+
+	t_create_file(".reuse.2", FILE_SIZE);
+	fd2 = open(".reuse.2", O_RDONLY);
+	unlink(".reuse.2");
+	if (fd2 < 0) {
+		perror("open .reuse.2");
+		goto err;
+	}
+
+	data.fd1 = fd1;
+	data.fd2 = fd2;
+	data.do_exit = 0;
+	pthread_create(&thread, NULL, flusher, &data);
+	usleep(10000);
+
+	gettimeofday(&tv, NULL);
+	for (i = 0; i < 1000; i++) {
+		ret = prep(fd1, str1, split, async);
+		if (ret) {
+			fprintf(stderr, "prep1 failed: %d\n", ret);
+			goto err;
+		}
+		ret = prep(fd2, str2, split, async);
+		if (ret) {
+			fprintf(stderr, "prep1 failed: %d\n", ret);
+			goto err;
+		}
+		ret = wait_nr(2);
+		if (ret) {
+			fprintf(stderr, "wait_nr: %d\n", ret);
+			goto err;
+		}
+		if (mtime_since_now(&tv) > 5000)
+			break;
+	}
+
+	data.do_exit = 1;
+	pthread_join(thread, &tret);
+
+	close(fd2);
+	close(fd1);
+	io_uring_queue_exit(&ring);
+	return 0;
+err:
+	io_uring_queue_exit(&ring);
+	return 1;
+
+}
+
+int main(int argc, char *argv[])
+{
+	int ret, i;
+
+	for (i = 0; i < 4; i++) {
+		int split, async;
+
+		split = (i & 1) != 0;
+		async = (i & 2) != 0;
+
+		ret = test_reuse(argc, argv, split, async);
+		if (ret) {
+			fprintf(stderr, "test_reuse %d %d failed\n", split, async);
+			return ret;
+		}
+		if (no_stable)
+			break;
+	}
+
+	return 0;
+}