Add cross-link

1 files changed, 498 insertions, 0 deletions

diff --git a/contrib/libs/liburing/test/link.c b/contrib/libs/liburing/test/link.c
new file mode 100644
index 0000000000..6f839394c3
--- /dev/null
+++ b/contrib/libs/liburing/test/link.c
@@ -0,0 +1,498 @@
+#include "../config-host.h"
+/* SPDX-License-Identifier: MIT */
+/*
+ * Description: run various linked sqe tests
+ *
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include "liburing.h"
+#include "helpers.h"
+
+static int no_hardlink;
+
+/*
+ * Timer with single nop
+ */
+static int test_single_hardlink(struct io_uring *ring)
+{
+	struct __kernel_timespec ts;
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	int ret, i;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "get sqe failed\n");
+		goto err;
+	}
+	ts.tv_sec = 0;
+	ts.tv_nsec = 10000000ULL;
+	io_uring_prep_timeout(sqe, &ts, 0, 0);
+	sqe->flags |= IOSQE_IO_LINK | IOSQE_IO_HARDLINK;
+	sqe->user_data = 1;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "get sqe failed\n");
+		goto err;
+	}
+	io_uring_prep_nop(sqe);
+	sqe->user_data = 2;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	for (i = 0; i < 2; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "wait completion %d\n", ret);
+			goto err;
+		}
+		if (!cqe) {
+			fprintf(stderr, "failed to get cqe\n");
+			goto err;
+		}
+		if (no_hardlink)
+			goto next;
+		if (cqe->user_data == 1 && cqe->res == -EINVAL) {
+			fprintf(stdout, "Hard links not supported, skipping\n");
+			no_hardlink = 1;
+			goto next;
+		}
+		if (cqe->user_data == 1 && cqe->res != -ETIME) {
+			fprintf(stderr, "timeout failed with %d\n", cqe->res);
+			goto err;
+		}
+		if (cqe->user_data == 2 && cqe->res) {
+			fprintf(stderr, "nop failed with %d\n", cqe->res);
+			goto err;
+		}
+next:
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Timer -> timer -> nop
+ */
+static int test_double_hardlink(struct io_uring *ring)
+{
+	struct __kernel_timespec ts1, ts2;
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	int ret, i;
+
+	if (no_hardlink)
+		return 0;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "get sqe failed\n");
+		goto err;
+	}
+	ts1.tv_sec = 0;
+	ts1.tv_nsec = 10000000ULL;
+	io_uring_prep_timeout(sqe, &ts1, 0, 0);
+	sqe->flags |= IOSQE_IO_LINK | IOSQE_IO_HARDLINK;
+	sqe->user_data = 1;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "get sqe failed\n");
+		goto err;
+	}
+	ts2.tv_sec = 0;
+	ts2.tv_nsec = 15000000ULL;
+	io_uring_prep_timeout(sqe, &ts2, 0, 0);
+	sqe->flags |= IOSQE_IO_LINK | IOSQE_IO_HARDLINK;
+	sqe->user_data = 2;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		fprintf(stderr, "get sqe failed\n");
+		goto err;
+	}
+	io_uring_prep_nop(sqe);
+	sqe->user_data = 3;
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		fprintf(stderr, "sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	for (i = 0; i < 3; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "wait completion %d\n", ret);
+			goto err;
+		}
+		if (!cqe) {
+			fprintf(stderr, "failed to get cqe\n");
+			goto err;
+		}
+		if (cqe->user_data == 1 && cqe->res != -ETIME) {
+			fprintf(stderr, "timeout failed with %d\n", cqe->res);
+			goto err;
+		}
+		if (cqe->user_data == 2 && cqe->res != -ETIME) {
+			fprintf(stderr, "timeout failed with %d\n", cqe->res);
+			goto err;
+		}
+		if (cqe->user_data == 3 && cqe->res) {
+			fprintf(stderr, "nop failed with %d\n", cqe->res);
+			goto err;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+
+}
+
+/*
+ * Test failing head of chain, and dependent getting -ECANCELED
+ */
+static int test_single_link_fail(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	int ret, i;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_remove_buffers(sqe, 10, 1);
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		printf("sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	for (i = 0; i < 2; i++) {
+		ret = io_uring_peek_cqe(ring, &cqe);
+		if (ret < 0) {
+			printf("wait completion %d\n", ret);
+			goto err;
+		}
+		if (!cqe) {
+			printf("failed to get cqe\n");
+			goto err;
+		}
+		if (i == 0 && cqe->res != -ENOENT) {
+			printf("sqe0 failed with %d, wanted -ENOENT\n", cqe->res);
+			goto err;
+		}
+		if (i == 1 && cqe->res != -ECANCELED) {
+			printf("sqe1 failed with %d, wanted -ECANCELED\n", cqe->res);
+			goto err;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test two independent chains
+ */
+static int test_double_chain(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	int ret, i;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		printf("sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	for (i = 0; i < 4; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			printf("wait completion %d\n", ret);
+			goto err;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test multiple dependents
+ */
+static int test_double_link(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	int ret, i;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		printf("sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	for (i = 0; i < 3; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			printf("wait completion %d\n", ret);
+			goto err;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+/*
+ * Test single dependency
+ */
+static int test_single_link(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	int ret, i;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+
+	ret = io_uring_submit(ring);
+	if (ret <= 0) {
+		printf("sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	for (i = 0; i < 2; i++) {
+		ret = io_uring_wait_cqe(ring, &cqe);
+		if (ret < 0) {
+			printf("wait completion %d\n", ret);
+			goto err;
+		}
+		io_uring_cqe_seen(ring, cqe);
+	}
+
+	return 0;
+err:
+	return 1;
+}
+
+static int test_early_fail_and_wait(void)
+{
+	struct io_uring ring;
+	struct io_uring_sqe *sqe;
+	int ret, invalid_fd = 42;
+	struct iovec iov = { .iov_base = NULL, .iov_len = 0 };
+
+	/* create a new ring as it leaves it dirty */
+	ret = io_uring_queue_init(8, &ring, 0);
+	if (ret) {
+		printf("ring setup failed\n");
+		return 1;
+	}
+
+	sqe = io_uring_get_sqe(&ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_readv(sqe, invalid_fd, &iov, 1, 0);
+	sqe->flags |= IOSQE_IO_LINK;
+
+	sqe = io_uring_get_sqe(&ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+
+	io_uring_prep_nop(sqe);
+
+	ret = io_uring_submit_and_wait(&ring, 2);
+	if (ret <= 0 && ret != -EAGAIN) {
+		printf("sqe submit failed: %d\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[])
+{
+	struct io_uring ring, poll_ring;
+	int ret;
+
+	if (argc > 1)
+		return T_EXIT_SKIP;
+
+	ret = io_uring_queue_init(8, &ring, 0);
+	if (ret) {
+		printf("ring setup failed\n");
+		return T_EXIT_FAIL;
+
+	}
+
+	ret = io_uring_queue_init(8, &poll_ring, IORING_SETUP_IOPOLL);
+	if (ret) {
+		printf("poll_ring setup failed\n");
+		return T_EXIT_FAIL;
+	}
+
+	ret = test_single_link(&ring);
+	if (ret) {
+		printf("test_single_link failed\n");
+		return ret;
+	}
+
+	ret = test_double_link(&ring);
+	if (ret) {
+		printf("test_double_link failed\n");
+		return ret;
+	}
+
+	ret = test_double_chain(&ring);
+	if (ret) {
+		printf("test_double_chain failed\n");
+		return ret;
+	}
+
+	ret = test_single_link_fail(&poll_ring);
+	if (ret) {
+		printf("test_single_link_fail failed\n");
+		return ret;
+	}
+
+	ret = test_single_hardlink(&ring);
+	if (ret) {
+		fprintf(stderr, "test_single_hardlink\n");
+		return ret;
+	}
+
+	ret = test_double_hardlink(&ring);
+	if (ret) {
+		fprintf(stderr, "test_double_hardlink\n");
+		return ret;
+	}
+
+	ret = test_early_fail_and_wait();
+	if (ret) {
+		fprintf(stderr, "test_early_fail_and_wait\n");
+		return ret;
+	}
+
+	return T_EXIT_PASS;
+}