tools/testing/vsock/vsock_uring_test.c

Source file repositories/reference/linux-study-clean/tools/testing/vsock/vsock_uring_test.c

File Facts

System
Linux kernel
Corpus path
tools/testing/vsock/vsock_uring_test.c
Extension
.c
Size
7715 bytes
Lines
354
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct vsock_io_uring_test {
	/* Number of valid elements in 'vecs'. */
	int vecs_cnt;
	struct iovec vecs[VSOCK_TEST_DATA_MAX_IOV];
};

static struct vsock_io_uring_test test_data_array[] = {
	/* All elements have page aligned base and size. */
	{
		.vecs_cnt = 3,
		{
			{ NULL, PAGE_SIZE },
			{ NULL, 2 * PAGE_SIZE },
			{ NULL, 3 * PAGE_SIZE },
		}
	},
	/* Middle element has both non-page aligned base and size. */
	{
		.vecs_cnt = 3,
		{
			{ NULL, PAGE_SIZE },
			{ (void *)1, 200  },
			{ NULL, 3 * PAGE_SIZE },
		}
	}
};

static void vsock_io_uring_client(const struct test_opts *opts,
				  const struct vsock_io_uring_test *test_data,
				  bool msg_zerocopy)
{
	struct io_uring_sqe *sqe;
	struct io_uring_cqe *cqe;
	struct io_uring ring;
	struct iovec *iovec;
	struct msghdr msg;
	int fd;

	fd = vsock_stream_connect(opts->peer_cid, opts->peer_port);
	if (fd < 0) {
		perror("connect");
		exit(EXIT_FAILURE);
	}

	if (msg_zerocopy)
		enable_so_zerocopy_check(fd);

	iovec = alloc_test_iovec(test_data->vecs, test_data->vecs_cnt);

	if (io_uring_queue_init(RING_ENTRIES_NUM, &ring, 0))
		error(1, errno, "io_uring_queue_init");

	if (io_uring_register_buffers(&ring, iovec, test_data->vecs_cnt))
		error(1, errno, "io_uring_register_buffers");

	memset(&msg, 0, sizeof(msg));
	msg.msg_iov = iovec;
	msg.msg_iovlen = test_data->vecs_cnt;
	sqe = io_uring_get_sqe(&ring);

	if (msg_zerocopy)
		io_uring_prep_sendmsg_zc(sqe, fd, &msg, 0);
	else
		io_uring_prep_sendmsg(sqe, fd, &msg, 0);

	if (io_uring_submit(&ring) != 1)
		error(1, errno, "io_uring_submit");

	if (io_uring_wait_cqe(&ring, &cqe))
		error(1, errno, "io_uring_wait_cqe");

	io_uring_cqe_seen(&ring, cqe);

	control_writeulong(iovec_hash_djb2(iovec, test_data->vecs_cnt));

	control_writeln("DONE");
	io_uring_queue_exit(&ring);
	free_test_iovec(test_data->vecs, iovec, test_data->vecs_cnt);
	close(fd);
}

static void vsock_io_uring_server(const struct test_opts *opts,
				  const struct vsock_io_uring_test *test_data)
{
	unsigned long remote_hash;
	unsigned long local_hash;
	struct io_uring ring;
	size_t data_len;
	size_t recv_len;
	void *data;

Annotation

Implementation Notes