682 lines
13 KiB
C
682 lines
13 KiB
C
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/*
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* vsock_diag_test - vsock_diag.ko test suite
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*
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* Copyright (C) 2017 Red Hat, Inc.
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*
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* Author: Stefan Hajnoczi <stefanha@redhat.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; version 2
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* of the License.
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*/
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#include <getopt.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <linux/list.h>
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#include <linux/net.h>
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#include <linux/netlink.h>
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#include <linux/sock_diag.h>
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#include <netinet/tcp.h>
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#include "../../../include/uapi/linux/vm_sockets.h"
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#include "../../../include/uapi/linux/vm_sockets_diag.h"
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#include "timeout.h"
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#include "control.h"
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enum test_mode {
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TEST_MODE_UNSET,
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TEST_MODE_CLIENT,
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TEST_MODE_SERVER
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};
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/* Per-socket status */
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struct vsock_stat {
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struct list_head list;
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struct vsock_diag_msg msg;
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};
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static const char *sock_type_str(int type)
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{
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switch (type) {
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case SOCK_DGRAM:
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return "DGRAM";
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case SOCK_STREAM:
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return "STREAM";
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default:
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return "INVALID TYPE";
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}
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}
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static const char *sock_state_str(int state)
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{
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switch (state) {
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case TCP_CLOSE:
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return "UNCONNECTED";
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case TCP_SYN_SENT:
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return "CONNECTING";
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case TCP_ESTABLISHED:
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return "CONNECTED";
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case TCP_CLOSING:
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return "DISCONNECTING";
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case TCP_LISTEN:
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return "LISTEN";
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default:
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return "INVALID STATE";
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}
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}
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static const char *sock_shutdown_str(int shutdown)
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{
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switch (shutdown) {
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case 1:
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return "RCV_SHUTDOWN";
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case 2:
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return "SEND_SHUTDOWN";
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case 3:
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return "RCV_SHUTDOWN | SEND_SHUTDOWN";
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default:
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return "0";
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}
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}
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static void print_vsock_addr(FILE *fp, unsigned int cid, unsigned int port)
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{
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if (cid == VMADDR_CID_ANY)
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fprintf(fp, "*:");
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else
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fprintf(fp, "%u:", cid);
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if (port == VMADDR_PORT_ANY)
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fprintf(fp, "*");
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else
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fprintf(fp, "%u", port);
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}
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static void print_vsock_stat(FILE *fp, struct vsock_stat *st)
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{
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print_vsock_addr(fp, st->msg.vdiag_src_cid, st->msg.vdiag_src_port);
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fprintf(fp, " ");
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print_vsock_addr(fp, st->msg.vdiag_dst_cid, st->msg.vdiag_dst_port);
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fprintf(fp, " %s %s %s %u\n",
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sock_type_str(st->msg.vdiag_type),
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sock_state_str(st->msg.vdiag_state),
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sock_shutdown_str(st->msg.vdiag_shutdown),
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st->msg.vdiag_ino);
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}
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static void print_vsock_stats(FILE *fp, struct list_head *head)
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{
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struct vsock_stat *st;
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list_for_each_entry(st, head, list)
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print_vsock_stat(fp, st);
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}
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static struct vsock_stat *find_vsock_stat(struct list_head *head, int fd)
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{
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struct vsock_stat *st;
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struct stat stat;
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if (fstat(fd, &stat) < 0) {
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perror("fstat");
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exit(EXIT_FAILURE);
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}
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list_for_each_entry(st, head, list)
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if (st->msg.vdiag_ino == stat.st_ino)
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return st;
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fprintf(stderr, "cannot find fd %d\n", fd);
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exit(EXIT_FAILURE);
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}
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static void check_no_sockets(struct list_head *head)
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{
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if (!list_empty(head)) {
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fprintf(stderr, "expected no sockets\n");
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print_vsock_stats(stderr, head);
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exit(1);
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}
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}
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static void check_num_sockets(struct list_head *head, int expected)
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{
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struct list_head *node;
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int n = 0;
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list_for_each(node, head)
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n++;
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if (n != expected) {
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fprintf(stderr, "expected %d sockets, found %d\n",
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expected, n);
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print_vsock_stats(stderr, head);
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exit(EXIT_FAILURE);
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}
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}
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static void check_socket_state(struct vsock_stat *st, __u8 state)
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{
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if (st->msg.vdiag_state != state) {
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fprintf(stderr, "expected socket state %#x, got %#x\n",
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state, st->msg.vdiag_state);
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exit(EXIT_FAILURE);
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}
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}
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static void send_req(int fd)
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{
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struct sockaddr_nl nladdr = {
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.nl_family = AF_NETLINK,
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};
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struct {
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struct nlmsghdr nlh;
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struct vsock_diag_req vreq;
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} req = {
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.nlh = {
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.nlmsg_len = sizeof(req),
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.nlmsg_type = SOCK_DIAG_BY_FAMILY,
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.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP,
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},
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.vreq = {
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.sdiag_family = AF_VSOCK,
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.vdiag_states = ~(__u32)0,
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},
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};
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struct iovec iov = {
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.iov_base = &req,
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.iov_len = sizeof(req),
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};
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struct msghdr msg = {
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.msg_name = &nladdr,
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.msg_namelen = sizeof(nladdr),
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.msg_iov = &iov,
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.msg_iovlen = 1,
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};
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for (;;) {
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if (sendmsg(fd, &msg, 0) < 0) {
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if (errno == EINTR)
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continue;
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perror("sendmsg");
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exit(EXIT_FAILURE);
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}
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return;
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}
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}
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static ssize_t recv_resp(int fd, void *buf, size_t len)
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{
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struct sockaddr_nl nladdr = {
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.nl_family = AF_NETLINK,
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};
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struct iovec iov = {
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.iov_base = buf,
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.iov_len = len,
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};
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struct msghdr msg = {
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.msg_name = &nladdr,
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.msg_namelen = sizeof(nladdr),
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.msg_iov = &iov,
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.msg_iovlen = 1,
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};
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ssize_t ret;
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do {
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ret = recvmsg(fd, &msg, 0);
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} while (ret < 0 && errno == EINTR);
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if (ret < 0) {
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perror("recvmsg");
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exit(EXIT_FAILURE);
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}
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return ret;
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}
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static void add_vsock_stat(struct list_head *sockets,
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const struct vsock_diag_msg *resp)
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{
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struct vsock_stat *st;
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st = malloc(sizeof(*st));
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if (!st) {
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perror("malloc");
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exit(EXIT_FAILURE);
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}
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st->msg = *resp;
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list_add_tail(&st->list, sockets);
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}
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/*
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* Read vsock stats into a list.
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*/
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static void read_vsock_stat(struct list_head *sockets)
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{
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long buf[8192 / sizeof(long)];
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int fd;
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fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG);
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if (fd < 0) {
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perror("socket");
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exit(EXIT_FAILURE);
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}
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send_req(fd);
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for (;;) {
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const struct nlmsghdr *h;
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ssize_t ret;
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ret = recv_resp(fd, buf, sizeof(buf));
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if (ret == 0)
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goto done;
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if (ret < sizeof(*h)) {
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fprintf(stderr, "short read of %zd bytes\n", ret);
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exit(EXIT_FAILURE);
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}
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h = (struct nlmsghdr *)buf;
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while (NLMSG_OK(h, ret)) {
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if (h->nlmsg_type == NLMSG_DONE)
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goto done;
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if (h->nlmsg_type == NLMSG_ERROR) {
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const struct nlmsgerr *err = NLMSG_DATA(h);
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if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
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fprintf(stderr, "NLMSG_ERROR\n");
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else {
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errno = -err->error;
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perror("NLMSG_ERROR");
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}
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exit(EXIT_FAILURE);
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}
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if (h->nlmsg_type != SOCK_DIAG_BY_FAMILY) {
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fprintf(stderr, "unexpected nlmsg_type %#x\n",
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h->nlmsg_type);
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exit(EXIT_FAILURE);
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}
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if (h->nlmsg_len <
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NLMSG_LENGTH(sizeof(struct vsock_diag_msg))) {
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fprintf(stderr, "short vsock_diag_msg\n");
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exit(EXIT_FAILURE);
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}
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add_vsock_stat(sockets, NLMSG_DATA(h));
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h = NLMSG_NEXT(h, ret);
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}
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}
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done:
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close(fd);
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}
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static void free_sock_stat(struct list_head *sockets)
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{
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struct vsock_stat *st;
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struct vsock_stat *next;
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list_for_each_entry_safe(st, next, sockets, list)
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free(st);
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}
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static void test_no_sockets(unsigned int peer_cid)
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{
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LIST_HEAD(sockets);
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read_vsock_stat(&sockets);
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check_no_sockets(&sockets);
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free_sock_stat(&sockets);
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}
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static void test_listen_socket_server(unsigned int peer_cid)
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{
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union {
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struct sockaddr sa;
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struct sockaddr_vm svm;
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} addr = {
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.svm = {
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.svm_family = AF_VSOCK,
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.svm_port = 1234,
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.svm_cid = VMADDR_CID_ANY,
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},
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};
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LIST_HEAD(sockets);
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struct vsock_stat *st;
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int fd;
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fd = socket(AF_VSOCK, SOCK_STREAM, 0);
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if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
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perror("bind");
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exit(EXIT_FAILURE);
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}
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if (listen(fd, 1) < 0) {
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perror("listen");
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exit(EXIT_FAILURE);
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}
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read_vsock_stat(&sockets);
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check_num_sockets(&sockets, 1);
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st = find_vsock_stat(&sockets, fd);
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check_socket_state(st, TCP_LISTEN);
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close(fd);
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free_sock_stat(&sockets);
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}
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static void test_connect_client(unsigned int peer_cid)
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{
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union {
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struct sockaddr sa;
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struct sockaddr_vm svm;
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} addr = {
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.svm = {
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.svm_family = AF_VSOCK,
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.svm_port = 1234,
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.svm_cid = peer_cid,
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},
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};
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int fd;
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int ret;
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LIST_HEAD(sockets);
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|
|
struct vsock_stat *st;
|
||
|
|
|
||
|
|
control_expectln("LISTENING");
|
||
|
|
|
||
|
|
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 < 0) {
|
||
|
|
perror("connect");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
|
||
|
|
read_vsock_stat(&sockets);
|
||
|
|
|
||
|
|
check_num_sockets(&sockets, 1);
|
||
|
|
st = find_vsock_stat(&sockets, fd);
|
||
|
|
check_socket_state(st, TCP_ESTABLISHED);
|
||
|
|
|
||
|
|
control_expectln("DONE");
|
||
|
|
control_writeln("DONE");
|
||
|
|
|
||
|
|
close(fd);
|
||
|
|
free_sock_stat(&sockets);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void test_connect_server(unsigned int peer_cid)
|
||
|
|
{
|
||
|
|
union {
|
||
|
|
struct sockaddr sa;
|
||
|
|
struct sockaddr_vm svm;
|
||
|
|
} addr = {
|
||
|
|
.svm = {
|
||
|
|
.svm_family = AF_VSOCK,
|
||
|
|
.svm_port = 1234,
|
||
|
|
.svm_cid = VMADDR_CID_ANY,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
union {
|
||
|
|
struct sockaddr sa;
|
||
|
|
struct sockaddr_vm svm;
|
||
|
|
} clientaddr;
|
||
|
|
socklen_t clientaddr_len = sizeof(clientaddr.svm);
|
||
|
|
LIST_HEAD(sockets);
|
||
|
|
struct vsock_stat *st;
|
||
|
|
int fd;
|
||
|
|
int client_fd;
|
||
|
|
|
||
|
|
fd = socket(AF_VSOCK, SOCK_STREAM, 0);
|
||
|
|
|
||
|
|
if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
|
||
|
|
perror("bind");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (listen(fd, 1) < 0) {
|
||
|
|
perror("listen");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
|
||
|
|
control_writeln("LISTENING");
|
||
|
|
|
||
|
|
timeout_begin(TIMEOUT);
|
||
|
|
do {
|
||
|
|
client_fd = accept(fd, &clientaddr.sa, &clientaddr_len);
|
||
|
|
timeout_check("accept");
|
||
|
|
} while (client_fd < 0 && errno == EINTR);
|
||
|
|
timeout_end();
|
||
|
|
|
||
|
|
if (client_fd < 0) {
|
||
|
|
perror("accept");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
if (clientaddr.sa.sa_family != AF_VSOCK) {
|
||
|
|
fprintf(stderr, "expected AF_VSOCK from accept(2), got %d\n",
|
||
|
|
clientaddr.sa.sa_family);
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
if (clientaddr.svm.svm_cid != peer_cid) {
|
||
|
|
fprintf(stderr, "expected peer CID %u from accept(2), got %u\n",
|
||
|
|
peer_cid, clientaddr.svm.svm_cid);
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
|
||
|
|
read_vsock_stat(&sockets);
|
||
|
|
|
||
|
|
check_num_sockets(&sockets, 2);
|
||
|
|
find_vsock_stat(&sockets, fd);
|
||
|
|
st = find_vsock_stat(&sockets, client_fd);
|
||
|
|
check_socket_state(st, TCP_ESTABLISHED);
|
||
|
|
|
||
|
|
control_writeln("DONE");
|
||
|
|
control_expectln("DONE");
|
||
|
|
|
||
|
|
close(client_fd);
|
||
|
|
close(fd);
|
||
|
|
free_sock_stat(&sockets);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct {
|
||
|
|
const char *name;
|
||
|
|
void (*run_client)(unsigned int peer_cid);
|
||
|
|
void (*run_server)(unsigned int peer_cid);
|
||
|
|
} test_cases[] = {
|
||
|
|
{
|
||
|
|
.name = "No sockets",
|
||
|
|
.run_server = test_no_sockets,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "Listen socket",
|
||
|
|
.run_server = test_listen_socket_server,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "Connect",
|
||
|
|
.run_client = test_connect_client,
|
||
|
|
.run_server = test_connect_server,
|
||
|
|
},
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
|
||
|
|
static void init_signals(void)
|
||
|
|
{
|
||
|
|
struct sigaction act = {
|
||
|
|
.sa_handler = sigalrm,
|
||
|
|
};
|
||
|
|
|
||
|
|
sigaction(SIGALRM, &act, NULL);
|
||
|
|
signal(SIGPIPE, SIG_IGN);
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned int parse_cid(const char *str)
|
||
|
|
{
|
||
|
|
char *endptr = NULL;
|
||
|
|
unsigned long int n;
|
||
|
|
|
||
|
|
errno = 0;
|
||
|
|
n = strtoul(str, &endptr, 10);
|
||
|
|
if (errno || *endptr != '\0') {
|
||
|
|
fprintf(stderr, "malformed CID \"%s\"\n", str);
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
|
||
|
|
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_diag_test [--help] [--control-host=<host>] --control-port=<port> --mode=client|server --peer-cid=<cid>\n"
|
||
|
|
"\n"
|
||
|
|
" Server: vsock_diag_test --control-port=1234 --mode=server --peer-cid=3\n"
|
||
|
|
" Client: vsock_diag_test --control-host=192.168.0.1 --control-port=1234 --mode=client --peer-cid=2\n"
|
||
|
|
"\n"
|
||
|
|
"Run vsock_diag.ko tests. Must be launched in both\n"
|
||
|
|
"guest 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;
|
||
|
|
int mode = TEST_MODE_UNSET;
|
||
|
|
unsigned int peer_cid = VMADDR_CID_ANY;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
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)
|
||
|
|
mode = TEST_MODE_CLIENT;
|
||
|
|
else if (strcmp(optarg, "server") == 0)
|
||
|
|
mode = TEST_MODE_SERVER;
|
||
|
|
else {
|
||
|
|
fprintf(stderr, "--mode must be \"client\" or \"server\"\n");
|
||
|
|
return EXIT_FAILURE;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 'p':
|
||
|
|
peer_cid = parse_cid(optarg);
|
||
|
|
break;
|
||
|
|
case 'P':
|
||
|
|
control_port = optarg;
|
||
|
|
break;
|
||
|
|
case '?':
|
||
|
|
default:
|
||
|
|
usage();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!control_port)
|
||
|
|
usage();
|
||
|
|
if (mode == TEST_MODE_UNSET)
|
||
|
|
usage();
|
||
|
|
if (peer_cid == VMADDR_CID_ANY)
|
||
|
|
usage();
|
||
|
|
|
||
|
|
if (!control_host) {
|
||
|
|
if (mode != TEST_MODE_SERVER)
|
||
|
|
usage();
|
||
|
|
control_host = "0.0.0.0";
|
||
|
|
}
|
||
|
|
|
||
|
|
control_init(control_host, control_port, mode == TEST_MODE_SERVER);
|
||
|
|
|
||
|
|
for (i = 0; test_cases[i].name; i++) {
|
||
|
|
void (*run)(unsigned int peer_cid);
|
||
|
|
|
||
|
|
printf("%s...", test_cases[i].name);
|
||
|
|
fflush(stdout);
|
||
|
|
|
||
|
|
if (mode == TEST_MODE_CLIENT)
|
||
|
|
run = test_cases[i].run_client;
|
||
|
|
else
|
||
|
|
run = test_cases[i].run_server;
|
||
|
|
|
||
|
|
if (run)
|
||
|
|
run(peer_cid);
|
||
|
|
|
||
|
|
printf("ok\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
control_cleanup();
|
||
|
|
return EXIT_SUCCESS;
|
||
|
|
}
|