Add cross-link

1 files changed, 205 insertions, 0 deletions

diff --git a/contrib/libs/liburing/test/sq-poll-dup.c b/contrib/libs/liburing/test/sq-poll-dup.c
new file mode 100644
index 0000000000..bbeb63e6cb
--- /dev/null
+++ b/contrib/libs/liburing/test/sq-poll-dup.c
@@ -0,0 +1,205 @@
+#include "../config-host.h"
+/* SPDX-License-Identifier: MIT */
+/*
+ * Description: test SQPOLL with IORING_SETUP_ATTACH_WQ and closing of
+ * the original ring descriptor.
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/eventfd.h>
+#include <sys/resource.h>
+
+#include "helpers.h"
+#include "liburing.h"
+
+#define FILE_SIZE	(128 * 1024 * 1024)
+#define BS		4096
+#define BUFFERS		64
+
+#define NR_RINGS	4
+
+static struct iovec *vecs;
+static struct io_uring rings[NR_RINGS];
+
+static int wait_io(struct io_uring *ring, int nr_ios)
+{
+	struct io_uring_cqe *cqe;
+	int ret;
+
+	while (nr_ios) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret) {
+			fprintf(stderr, "wait_ret=%d\n", ret);
+			return 1;
+		}
+		if (cqe->res != BS) {
+			fprintf(stderr, "Unexpected ret %d\n", cqe->res);
+			return 1;
+		}
+		io_uring_cqe_seen(ring, cqe);
+		nr_ios--;
+	}
+
+	return 0;
+}
+
+static int queue_io(struct io_uring *ring, int fd, int nr_ios)
+{
+	unsigned long off;
+	int i;
+
+	i = 0;
+	off = 0;
+	while (nr_ios) {
+		struct io_uring_sqe *sqe;
+
+		sqe = io_uring_get_sqe(ring);
+		if (!sqe)
+			break;
+		io_uring_prep_read(sqe, fd, vecs[i].iov_base, vecs[i].iov_len, off);
+		nr_ios--;
+		i++;
+		off += BS;
+	}
+
+	io_uring_submit(ring);
+	return i;
+}
+
+static int do_io(int fd, int ring_start, int ring_end)
+{
+	int i, rets[NR_RINGS];
+	unsigned ios = 0;
+
+	while (ios < 32) {
+		for (i = ring_start; i < ring_end; i++) {
+			int ret = queue_io(&rings[i], fd, BUFFERS);
+			if (ret < 0)
+				goto err;
+			rets[i] = ret;
+		}
+		for (i = ring_start; i < ring_end; i++) {
+			if (wait_io(&rings[i], rets[i]))
+				goto err;
+		}
+		ios += BUFFERS;
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+static int test(int fd, int do_dup_and_close, int close_ring)
+{
+	int i, ret, ring_fd;
+
+	for (i = 0; i < NR_RINGS; i++) {
+		struct io_uring_params p = { };
+
+		p.flags = IORING_SETUP_SQPOLL;
+		p.sq_thread_idle = 100;
+		if (i) {
+			p.wq_fd = rings[0].ring_fd;
+			p.flags |= IORING_SETUP_ATTACH_WQ;
+		}
+		ret = io_uring_queue_init_params(BUFFERS, &rings[i], &p);
+		if (ret) {
+			fprintf(stderr, "queue_init: %d/%d\n", ret, i);
+			goto err;
+		}
+		/* no sharing for non-fixed either */
+		if (!(p.features & IORING_FEAT_SQPOLL_NONFIXED)) {
+			fprintf(stdout, "No SQPOLL sharing, skipping\n");
+			return 0;
+		}
+	}
+
+	/* test all rings */
+	if (do_io(fd, 0, NR_RINGS))
+		goto err;
+
+	/* dup and close original ring fd */
+	ring_fd = dup(rings[0].ring_fd);
+	if (close_ring)
+		close(rings[0].ring_fd);
+	rings[0].ring_fd = rings[0].enter_ring_fd = ring_fd;
+	if (do_dup_and_close)
+		goto done;
+
+	/* test all but closed one */
+	if (do_io(fd, 1, NR_RINGS))
+		goto err;
+
+	/* test closed one */
+	if (do_io(fd, 0, 1))
+		goto err;
+
+	/* make sure thread is idle so we enter the kernel */
+	usleep(200000);
+
+	/* test closed one */
+	if (do_io(fd, 0, 1))
+		goto err;
+
+
+done:
+	for (i = 0; i < NR_RINGS; i++)
+		io_uring_queue_exit(&rings[i]);
+
+	return 0;
+err:
+	return 1;
+}
+
+int main(int argc, char *argv[])
+{
+	char *fname;
+	int ret, fd;
+
+	if (argc > 1) {
+		fname = argv[1];
+	} else {
+		fname = ".basic-rw-poll-dup";
+		t_create_file(fname, FILE_SIZE);
+	}
+
+	vecs = t_create_buffers(BUFFERS, BS);
+
+	fd = open(fname, O_RDONLY | O_DIRECT);
+	if (fname != argv[1])
+		unlink(fname);
+
+	if (fd < 0) {
+		perror("open");
+		return -1;
+	}
+
+	ret = test(fd, 0, 0);
+	if (ret) {
+		fprintf(stderr, "test 0 0 failed\n");
+		goto err;
+	}
+
+	ret = test(fd, 0, 1);
+	if (ret) {
+		fprintf(stderr, "test 0 1 failed\n");
+		goto err;
+	}
+
+
+	ret = test(fd, 1, 0);
+	if (ret) {
+		fprintf(stderr, "test 1 0 failed\n");
+		goto err;
+	}
+
+	return 0;
+err:
+	return 1;
+}