OpenCloudOS-Kernel/tools/testing/vsock/vsock_test.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * vsock_test - vsock.ko test suite
 *
 * Copyright (C) 2017 Red Hat, Inc.
 *
 * Author: Stefan Hajnoczi <stefanha@redhat.com>
 */

#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>

#include "timeout.h"
#include "control.h"
#include "util.h"

static void test_stream_connection_reset(const struct test_opts *opts)
{
	union {
		struct sockaddr sa;
		struct sockaddr_vm svm;
	} addr = {
		.svm = {
			.svm_family = AF_VSOCK,
			.svm_port = 1234,
			.svm_cid = opts->peer_cid,
		},
	};
	int ret;
	int fd;

	fd = socket(AF_VSOCK, SOCK_STREAM, 0);

	timeout_begin(TIMEOUT);
	do {
		ret = connect(fd, &addr.sa, sizeof(addr.svm));
		timeout_check("connect");
	} while (ret < 0 && errno == EINTR);
	timeout_end();

	if (ret != -1) {
		fprintf(stderr, "expected connect(2) failure, got %d\n", ret);
		exit(EXIT_FAILURE);
	}
	if (errno != ECONNRESET) {
		fprintf(stderr, "unexpected connect(2) errno %d\n", errno);
		exit(EXIT_FAILURE);
	}

	close(fd);
}

static void test_stream_client_close_client(const struct test_opts *opts)
{
	int fd;

	fd = vsock_stream_connect(opts->peer_cid, 1234);
	if (fd < 0) {
		perror("connect");
		exit(EXIT_FAILURE);
	}

	send_byte(fd, 1, 0);
	close(fd);
	control_writeln("CLOSED");
}

static void test_stream_client_close_server(const struct test_opts *opts)
{
	int fd;

	fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
	if (fd < 0) {
		perror("accept");
		exit(EXIT_FAILURE);
	}

	control_expectln("CLOSED");

	send_byte(fd, -EPIPE, 0);
	recv_byte(fd, 1, 0);
	recv_byte(fd, 0, 0);
	close(fd);
}

static void test_stream_server_close_client(const struct test_opts *opts)
{
	int fd;

	fd = vsock_stream_connect(opts->peer_cid, 1234);
	if (fd < 0) {
		perror("connect");
		exit(EXIT_FAILURE);
	}

	control_expectln("CLOSED");

	send_byte(fd, -EPIPE, 0);
	recv_byte(fd, 1, 0);
	recv_byte(fd, 0, 0);
	close(fd);
}

static void test_stream_server_close_server(const struct test_opts *opts)
{
	int fd;

	fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
	if (fd < 0) {
		perror("accept");
		exit(EXIT_FAILURE);
	}

	send_byte(fd, 1, 0);
	close(fd);
	control_writeln("CLOSED");
}

/* With the standard socket sizes, VMCI is able to support about 100
 * concurrent stream connections.
 */
#define MULTICONN_NFDS 100

static void test_stream_multiconn_client(const struct test_opts *opts)
{
	int fds[MULTICONN_NFDS];
	int i;

	for (i = 0; i < MULTICONN_NFDS; i++) {
		fds[i] = vsock_stream_connect(opts->peer_cid, 1234);
		if (fds[i] < 0) {
			perror("connect");
			exit(EXIT_FAILURE);
		}
	}

	for (i = 0; i < MULTICONN_NFDS; i++) {
		if (i % 2)
			recv_byte(fds[i], 1, 0);
		else
			send_byte(fds[i], 1, 0);
	}

	for (i = 0; i < MULTICONN_NFDS; i++)
		close(fds[i]);
}

static void test_stream_multiconn_server(const struct test_opts *opts)
{
	int fds[MULTICONN_NFDS];
	int i;

	for (i = 0; i < MULTICONN_NFDS; i++) {
		fds[i] = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
		if (fds[i] < 0) {
			perror("accept");
			exit(EXIT_FAILURE);
		}
	}

	for (i = 0; i < MULTICONN_NFDS; i++) {
		if (i % 2)
			send_byte(fds[i], 1, 0);
		else
			recv_byte(fds[i], 1, 0);
	}

	for (i = 0; i < MULTICONN_NFDS; i++)
		close(fds[i]);
}

static struct test_case test_cases[] = {
	{
		.name = "SOCK_STREAM connection reset",
		.run_client = test_stream_connection_reset,
	},
	{
		.name = "SOCK_STREAM client close",
		.run_client = test_stream_client_close_client,
		.run_server = test_stream_client_close_server,
	},
	{
		.name = "SOCK_STREAM server close",
		.run_client = test_stream_server_close_client,
		.run_server = test_stream_server_close_server,
	},
	{
		.name = "SOCK_STREAM multiple connections",
		.run_client = test_stream_multiconn_client,
		.run_server = test_stream_multiconn_server,
	},
	{},
};

static const char optstring[] = "";
static const struct option longopts[] = {
	{
		.name = "control-host",
		.has_arg = required_argument,
		.val = 'H',
	},
	{
		.name = "control-port",
		.has_arg = required_argument,
		.val = 'P',
	},
	{
		.name = "mode",
		.has_arg = required_argument,
		.val = 'm',
	},
	{
		.name = "peer-cid",
		.has_arg = required_argument,
		.val = 'p',
	},
	{
		.name = "help",
		.has_arg = no_argument,
		.val = '?',
	},
	{},
};

static void usage(void)
{
	fprintf(stderr, "Usage: vsock_test [--help] [--control-host=<host>] --control-port=<port> --mode=client|server --peer-cid=<cid>\n"
		"\n"
		"  Server: vsock_test --control-port=1234 --mode=server --peer-cid=3\n"
		"  Client: vsock_test --control-host=192.168.0.1 --control-port=1234 --mode=client --peer-cid=2\n"
		"\n"
		"Run vsock.ko tests.  Must be launched in both guest\n"
		"and host.  One side must use --mode=client and\n"
		"the other side must use --mode=server.\n"
		"\n"
		"A TCP control socket connection is used to coordinate tests\n"
		"between the client and the server.  The server requires a\n"
		"listen address and the client requires an address to\n"
		"connect to.\n"
		"\n"
		"The CID of the other side must be given with --peer-cid=<cid>.\n");
	exit(EXIT_FAILURE);
}

int main(int argc, char **argv)
{
	const char *control_host = NULL;
	const char *control_port = NULL;
	struct test_opts opts = {
		.mode = TEST_MODE_UNSET,
		.peer_cid = VMADDR_CID_ANY,
	};

	init_signals();

	for (;;) {
		int opt = getopt_long(argc, argv, optstring, longopts, NULL);

		if (opt == -1)
			break;

		switch (opt) {
		case 'H':
			control_host = optarg;
			break;
		case 'm':
			if (strcmp(optarg, "client") == 0)
				opts.mode = TEST_MODE_CLIENT;
			else if (strcmp(optarg, "server") == 0)
				opts.mode = TEST_MODE_SERVER;
			else {
				fprintf(stderr, "--mode must be \"client\" or \"server\"\n");
				return EXIT_FAILURE;
			}
			break;
		case 'p':
			opts.peer_cid = parse_cid(optarg);
			break;
		case 'P':
			control_port = optarg;
			break;
		case '?':
		default:
			usage();
		}
	}

	if (!control_port)
		usage();
	if (opts.mode == TEST_MODE_UNSET)
		usage();
	if (opts.peer_cid == VMADDR_CID_ANY)
		usage();

	if (!control_host) {
		if (opts.mode != TEST_MODE_SERVER)
			usage();
		control_host = "0.0.0.0";
	}

	control_init(control_host, control_port,
		     opts.mode == TEST_MODE_SERVER);

	run_tests(test_cases, &opts);

	control_cleanup();
	return EXIT_SUCCESS;
}