Exemplo n.º 1
0
static int handle_cpuinfo(int sk, CriuReq *msg)
{
	CriuResp resp = CRIU_RESP__INIT;
	bool success = false;
	int pid, status;

	pid = fork();
	if (pid < 0) {
		pr_perror("Can't fork");
		goto out;
	}

	if (pid == 0) {
		int ret = 1;

		if (setup_opts_from_req(sk, msg->opts))
			goto cout;

		setproctitle("cpuinfo %s --rpc -D %s",
			     msg->type == CRIU_REQ_TYPE__CPUINFO_DUMP ?
			     "dump" : "check",
			     images_dir);

		if (msg->type == CRIU_REQ_TYPE__CPUINFO_DUMP)
			ret = cpuinfo_dump();
		else
			ret = cpuinfo_check();
cout:
		exit(ret);
	}

	if (waitpid(pid, &status, 0) != pid) {
		pr_perror("Unable to wait %d", pid);
		goto out;
	}
	if (!WIFEXITED(status))
		goto out;
	switch (WEXITSTATUS(status)) {
	case (-ENOTSUP & 0xff):
		resp.has_cr_errno = 1;
		/*
		 * Let's return the actual error code and
		 * not just (-ENOTSUP & 0xff)
		 */
		resp.cr_errno = ENOTSUP;
		break;
	case 0:
		success = true;
		break;
	default:
		break;
	}

out:
	resp.type = msg->type;
	resp.success = success;

	return send_criu_msg(sk, &resp);
}
Exemplo n.º 2
0
int main(int argc, char *argv[])
{
  int i;
  FILE *out;
  const char *out_filename = NULL;

  for (i = 1; i < argc; i++) {
	const char *arg = argv[i];
	if (strcmp(arg, "-d") == 0 || strcmp(arg, "--debug") == 0) {
	  if (++i < argc)
		out_filename = argv[i];
	  else
		out_filename = "-"; /* stdout */
	}
	else if (strcmp(arg, "-h") == 0 || strcmp(arg, "--help") == 0) {
	  print_usage(argv[0]);
	  return 0;
	}
  }

  struct cpuinfo *cip = cpuinfo_new();
  if (cip == NULL) {
	fprintf(stderr, "ERROR: could not allocate cpuinfo descriptor\n");
	return 1;
  }

  if (out_filename == NULL || strcmp(out_filename, "-") == 0)
	out = stdout;
  else {
	if ((out = fopen(out_filename, "w")) == NULL) {
	  fprintf(stderr, "ERROR: could not open debug file '%s'\n", out_filename);
	  return 2;
	}
  }

  if (out_filename)
	cpuinfo_set_debug_file(out);

  print_cpuinfo(cip, out);

  if (out_filename) { /* debug mode */
	fprintf(out, "\n### DEBUGGING INFORMATION ###\n\n");
	cpuinfo_dump(cip, out);
  }

  if (out != stdout)
	fclose(out);

  cpuinfo_destroy(cip);

  return 0;
}
Exemplo n.º 3
0
static int handle_cpuinfo(int sk, CriuReq *msg)
{
	CriuResp resp = CRIU_RESP__INIT;
	bool success = false;
	int pid, status;

	pid = fork();
	if (pid < 0) {
		pr_perror("Can't fork");
		goto out;
	}

	if (pid == 0) {
		int ret = 1;

		if (setup_opts_from_req(sk, msg->opts))
			goto cout;

		setproctitle("cpuinfo %s --rpc -D %s",
			     msg->type == CRIU_REQ_TYPE__CPUINFO_DUMP ?
			     "dump" : "check",
			     images_dir);

		if (msg->type == CRIU_REQ_TYPE__CPUINFO_DUMP)
			ret = cpuinfo_dump();
		else
			ret = cpuinfo_check();
cout:
		exit(ret);
	}

	wait(&status);
	if (!WIFEXITED(status) || WEXITSTATUS(status))
		goto out;

	success = true;
out:
	resp.type = msg->type;
	resp.success = success;

	return send_criu_msg(sk, &resp);
}
Exemplo n.º 4
0
int main(int argc, char *argv[], char *envp[])
{
	pid_t pid = 0, tree_id = 0;
	int ret = -1;
	bool usage_error = true;
	bool has_exec_cmd = false;
	int opt, idx;
	int log_level = LOG_UNSET;
	char *imgs_dir = ".";
	char *work_dir = NULL;
	static const char short_opts[] = "dSsRf:F:t:p:hcD:o:n:v::x::Vr:jlW:L:M:";
	static struct option long_opts[] = {
		{ "tree",			required_argument,	0, 't'	},
		{ "pid",			required_argument,	0, 'p'	},
		{ "leave-stopped",		no_argument,		0, 's'	},
		{ "leave-running",		no_argument,		0, 'R'	},
		{ "restore-detached",		no_argument,		0, 'd'	},
		{ "restore-sibling",		no_argument,		0, 'S'	},
		{ "daemon",			no_argument,		0, 'd'	},
		{ "contents",			no_argument,		0, 'c'	},
		{ "file",			required_argument,	0, 'f'	},
		{ "fields",			required_argument,	0, 'F'	},
		{ "images-dir",			required_argument,	0, 'D'	},
		{ "work-dir",			required_argument,	0, 'W'	},
		{ "log-file",			required_argument,	0, 'o'	},
		{ "namespaces",			required_argument,	0, 'n'	},
		{ "root",			required_argument,	0, 'r'	},
		{ USK_EXT_PARAM,		optional_argument,	0, 'x'	},
		{ "help",			no_argument,		0, 'h'	},
		{ SK_EST_PARAM,			no_argument,		0, 1042	},
		{ "close",			required_argument,	0, 1043	},
		{ "log-pid",			no_argument,		0, 1044	},
		{ "version",			no_argument,		0, 'V'	},
		{ "evasive-devices",		no_argument,		0, 1045	},
		{ "pidfile",			required_argument,	0, 1046	},
		{ "veth-pair",			required_argument,	0, 1047	},
		{ "action-script",		required_argument,	0, 1049	},
		{ LREMAP_PARAM,			no_argument,		0, 1041	},
		{ OPT_SHELL_JOB,		no_argument,		0, 'j'	},
		{ OPT_FILE_LOCKS,		no_argument,		0, 'l'	},
		{ "page-server",		no_argument,		0, 1050	},
		{ "address",			required_argument,	0, 1051	},
		{ "port",			required_argument,	0, 1052	},
		{ "prev-images-dir",		required_argument,	0, 1053	},
		{ "ms",				no_argument,		0, 1054	},
		{ "track-mem",			no_argument,		0, 1055	},
		{ "auto-dedup",			no_argument,		0, 1056	},
		{ "libdir",			required_argument,	0, 'L'	},
		{ "cpu-cap",			optional_argument,	0, 1057	},
		{ "force-irmap",		no_argument,		0, 1058	},
		{ "ext-mount-map",		required_argument,	0, 'M'	},
		{ "exec-cmd",			no_argument,		0, 1059	},
		{ "manage-cgroups",		optional_argument,	0, 1060	},
		{ "cgroup-root",		required_argument,	0, 1061	},
		{ "inherit-fd",			required_argument,	0, 1062	},
		{ "feature",			required_argument,	0, 1063	},
		{ "skip-mnt",			required_argument,	0, 1064 },
		{ "enable-fs",			required_argument,	0, 1065 },
		{ "enable-external-sharing", 	no_argument, 		0, 1066 },
		{ "enable-external-masters", 	no_argument, 		0, 1067 },
		{ "freeze-cgroup",		required_argument,	0, 1068 },
		{ "ghost-limit",		required_argument,	0, 1069 },
		{ "irmap-scan-path",		required_argument,	0, 1070 },
		{ "lsm-profile",		required_argument,	0, 1071 },
		{ "timeout",			required_argument,	0, 1072 },
		{ "external",			required_argument,	0, 1073	},
		{ "empty-ns",			required_argument,	0, 1074	},
		{ "extra",			no_argument,		0, 1077	},
		{ "experimental",		no_argument,		0, 1078	},
		{ "all",			no_argument,		0, 1079	},
		{ },
	};

	BUILD_BUG_ON(PAGE_SIZE != PAGE_IMAGE_SIZE);

	if (fault_injection_init())
		return 1;

	cr_pb_init();
	setproctitle_init(argc, argv, envp);

	if (argc < 2)
		goto usage;

	init_opts();

	if (init_service_fd())
		return 1;

	if (!strcmp(argv[1], "swrk")) {
		if (argc < 3)
			goto usage;
		/*
		 * This is to start criu service worker from libcriu calls.
		 * The usage is "criu swrk <fd>" and is not for CLI/scripts.
		 * The arguments semantics can change at any tyme with the
		 * corresponding lib call change.
		 */
		opts.swrk_restore = true;
		return cr_service_work(atoi(argv[2]));
	}

	while (1) {
		idx = -1;
		opt = getopt_long(argc, argv, short_opts, long_opts, &idx);
		if (opt == -1)
			break;

		switch (opt) {
		case 's':
			opts.final_state = TASK_STOPPED;
			break;
		case 'R':
			opts.final_state = TASK_ALIVE;
			break;
		case 'x':
			if (optarg && unix_sk_ids_parse(optarg) < 0)
				return 1;
			opts.ext_unix_sk = true;
			break;
		case 'p':
			pid = atoi(optarg);
			if (pid <= 0)
				goto bad_arg;
			break;
		case 't':
			tree_id = atoi(optarg);
			if (tree_id <= 0)
				goto bad_arg;
			break;
		case 'c':
			opts.show_pages_content	= true;
			break;
		case 'f':
			opts.show_dump_file = optarg;
			break;
		case 'F':
			opts.show_fmt = optarg;
			break;
		case 'r':
			opts.root = optarg;
			break;
		case 'd':
			opts.restore_detach = true;
			break;
		case 'S':
			opts.restore_sibling = true;
			break;
		case 'D':
			imgs_dir = optarg;
			break;
		case 'W':
			work_dir = optarg;
			break;
		case 'o':
			opts.output = optarg;
			break;
		case 'n':
			if (parse_ns_string(optarg))
				goto bad_arg;
			break;
		case 'v':
			if (log_level == LOG_UNSET)
				log_level = 0;
			if (optarg) {
				if (optarg[0] == 'v')
					/* handle -vvvvv */
					log_level += strlen(optarg) + 1;
				else
					log_level = atoi(optarg);
			} else
				log_level++;
			break;
		case 1041:
			pr_info("Will allow link remaps on FS\n");
			opts.link_remap_ok = true;
			break;
		case 1042:
			pr_info("Will dump TCP connections\n");
			opts.tcp_established_ok = true;
			break;
		case 1043: {
			int fd;

			fd = atoi(optarg);
			pr_info("Closing fd %d\n", fd);
			close(fd);
			break;
		}
		case 1044:
			opts.log_file_per_pid = 1;
			break;
		case 1045:
			opts.evasive_devices = true;
			break;
		case 1046:
			opts.pidfile = optarg;
			break;
		case 1047:
			{
				char *aux;

				aux = strchr(optarg, '=');
				if (aux == NULL)
					goto bad_arg;

				*aux = '\0';
				if (veth_pair_add(optarg, aux + 1))
					return 1;
			}
			break;
		case 1049:
			if (add_script(optarg, 0))
				return 1;

			break;
		case 1050:
			opts.use_page_server = true;
			break;
		case 1051:
			opts.addr = optarg;
			break;
		case 1052:
			opts.port = htons(atoi(optarg));
			if (!opts.port)
				goto bad_arg;
			break;
		case 'j':
			opts.shell_job = true;
			break;
		case 'l':
			opts.handle_file_locks = true;
			break;
		case 1053:
			opts.img_parent = optarg;
			break;
		case 1055:
			opts.track_mem = true;
			break;
		case 1056:
			opts.auto_dedup = true;
			break;
		case 1057:
			if (parse_cpu_cap(&opts, optarg))
				goto usage;
			break;
		case 1058:
			opts.force_irmap = true;
			break;
		case 1054:
			pr_err("--ms is deprecated; see \"Check options\" of criu --help\n");
			return 1;
		case 'L':
			opts.libdir = optarg;
			break;
		case 1059:
			has_exec_cmd = true;
			break;
		case 1060:
			if (parse_manage_cgroups(&opts, optarg))
				goto usage;
			break;
		case 1061:
			{
				char *path, *ctl;

				path = strchr(optarg, ':');
				if (path) {
					*path = '\0';
					path++;
					ctl = optarg;
				} else {
					path = optarg;
					ctl = NULL;
				}

				if (new_cg_root_add(ctl, path))
					return -1;
			}
			break;
		case 1062:
			if (inherit_fd_parse(optarg) < 0)
				return 1;
			break;
		case 1063:
			ret = check_add_feature(optarg);
			if (ret < 0)	/* invalid kernel feature name */
				return 1;
			if (ret > 0)	/* list kernel features and exit */
				return 0;
			break;
		case 1064:
			if (!add_skip_mount(optarg))
				return 1;
			break;
		case 1065:
			if (!add_fsname_auto(optarg))
				return 1;
			break;
		case 1066:
			opts.enable_external_sharing = true;
			break;
		case 1067:
			opts.enable_external_masters = true;
			break;
		case 1068:
			opts.freeze_cgroup = optarg;
			break;
		case 1069:
			opts.ghost_limit = parse_size(optarg);
			break;
		case 1070:
			if (irmap_scan_path_add(optarg))
				return -1;
			break;
		case 1071:
			if (parse_lsm_arg(optarg) < 0)
				return -1;
			break;
		case 1072:
			opts.timeout = atoi(optarg);
			break;
		case 'M':
			{
				char *aux;

				if (strcmp(optarg, "auto") == 0) {
					opts.autodetect_ext_mounts = true;
					break;
				}

				aux = strchr(optarg, ':');
				if (aux == NULL)
					goto bad_arg;

				*aux = '\0';
				if (ext_mount_add(optarg, aux + 1))
					return 1;
			}
			break;
		case 1073:
			if (add_external(optarg))
				return 1;
			break;
		case 1074:
			if (!strcmp("net", optarg))
				opts.empty_ns |= CLONE_NEWNET;
			else {
				pr_err("Unsupported empty namespace: %s", optarg);
				return 1;
			}
			break;
		case 1077:
			opts.check_extra_features = true;
			break;
		case 1078:
			opts.check_experimental_features = true;
			break;
		case 1079:
			opts.check_extra_features = true;
			opts.check_experimental_features = true;
			break;
		case 'V':
			pr_msg("Version: %s\n", CRIU_VERSION);
			if (strcmp(CRIU_GITID, "0"))
				pr_msg("GitID: %s\n", CRIU_GITID);
			return 0;
		case 'h':
			usage_error = false;
			goto usage;
		default:
			goto usage;
		}
	}

	if (!opts.restore_detach && opts.restore_sibling) {
		pr_msg("--restore-sibling only makes sense with --restore-detach\n");
		return 1;
	}

	if (!opts.autodetect_ext_mounts && (opts.enable_external_masters || opts.enable_external_sharing)) {
		pr_msg("must specify --ext-mount-map auto with --enable-external-{sharing|masters}");
		return 1;
	}

	if (work_dir == NULL)
		work_dir = imgs_dir;

	if (optind >= argc) {
		pr_msg("Error: command is required\n");
		goto usage;
	}

	if (has_exec_cmd) {
		if (argc - optind <= 1) {
			pr_msg("Error: --exec-cmd requires a command\n");
			goto usage;
		}

		if (strcmp(argv[optind], "restore")) {
			pr_msg("Error: --exec-cmd is available for the restore command only\n");
			goto usage;
		}

		if (opts.restore_detach) {
			pr_msg("Error: --restore-detached and --exec-cmd cannot be used together\n");
			goto usage;
		}

		opts.exec_cmd = xmalloc((argc - optind) * sizeof(char *));
		if (!opts.exec_cmd)
			return 1;
		memcpy(opts.exec_cmd, &argv[optind + 1], (argc - optind - 1) * sizeof(char *));
		opts.exec_cmd[argc - optind - 1] = NULL;
	}

	/* We must not open imgs dir, if service is called */
	if (strcmp(argv[optind], "service")) {
		ret = open_image_dir(imgs_dir);
		if (ret < 0)
			return 1;
	}

	if (chdir(work_dir)) {
		pr_perror("Can't change directory to %s", work_dir);
		return 1;
	}

	log_set_loglevel(log_level);

	if (log_init(opts.output))
		return 1;

	if (!list_empty(&opts.external) && strcmp(argv[optind], "dump")) {
		pr_err("--external is dump-only option\n");
		return 1;
	}

	if (!list_empty(&opts.inherit_fds)) {
		if (strcmp(argv[optind], "restore")) {
			pr_err("--inherit-fd is restore-only option\n");
			return 1;
		}
		/* now that log file is set up, print inherit fd list */
		inherit_fd_log();
	}

	if (opts.img_parent)
		pr_info("Will do snapshot from %s\n", opts.img_parent);

	if (!strcmp(argv[optind], "dump")) {
		preload_socket_modules();
		preload_netfilter_modules();

		if (!tree_id)
			goto opt_pid_missing;
		return cr_dump_tasks(tree_id);
	}

	if (!strcmp(argv[optind], "pre-dump")) {
		if (!tree_id)
			goto opt_pid_missing;

		return cr_pre_dump_tasks(tree_id) != 0;
	}

	if (!strcmp(argv[optind], "restore")) {
		preload_netfilter_modules();
		if (tree_id)
			pr_warn("Using -t with criu restore is obsoleted\n");

		ret = cr_restore_tasks();
		if (ret == 0 && opts.exec_cmd) {
			close_pid_proc();
			execvp(opts.exec_cmd[0], opts.exec_cmd);
			pr_perror("Failed to exec command %s", opts.exec_cmd[0]);
			ret = 1;
		}

		return ret != 0;
	}

	if (!strcmp(argv[optind], "show")) {
		pr_msg("The \"show\" action is deprecated by the CRIT utility.\n");
		pr_msg("To view an image use the \"crit decode -i $name --pretty\" command.\n");
		return -1;
	}

	if (!strcmp(argv[optind], "check"))
		return cr_check() != 0;

	if (!strcmp(argv[optind], "exec")) {
		if (!pid)
			pid = tree_id; /* old usage */
		if (!pid)
			goto opt_pid_missing;
		return cr_exec(pid, argv + optind + 1) != 0;
	}

	if (!strcmp(argv[optind], "page-server"))
		return cr_page_server(opts.daemon_mode, -1) > 0 ? 0 : 1;

	if (!strcmp(argv[optind], "service"))
		return cr_service(opts.daemon_mode);

	if (!strcmp(argv[optind], "dedup"))
		return cr_dedup() != 0;

	if (!strcmp(argv[optind], "cpuinfo")) {
		if (!argv[optind + 1])
			goto usage;
		if (!strcmp(argv[optind + 1], "dump"))
			return cpuinfo_dump();
		else if (!strcmp(argv[optind + 1], "check"))
			return cpuinfo_check();
	}

	pr_msg("Error: unknown command: %s\n", argv[optind]);
usage:
	pr_msg("\n"
"Usage:\n"
"  criu dump|pre-dump -t PID [<options>]\n"
"  criu restore [<options>]\n"
"  criu check [--feature FEAT]\n"
"  criu exec -p PID <syscall-string>\n"
"  criu page-server\n"
"  criu service [<options>]\n"
"  criu dedup\n"
"\n"
"Commands:\n"
"  dump           checkpoint a process/tree identified by pid\n"
"  pre-dump       pre-dump task(s) minimizing their frozen time\n"
"  restore        restore a process/tree\n"
"  check          checks whether the kernel support is up-to-date\n"
"  exec           execute a system call by other task\n"
"  page-server    launch page server\n"
"  service        launch service\n"
"  dedup          remove duplicates in memory dump\n"
"  cpuinfo dump   writes cpu information into image file\n"
"  cpuinfo check  validates cpu information read from image file\n"
	);

	if (usage_error) {
		pr_msg("\nTry -h|--help for more info\n");
		return 1;
	}

	pr_msg("\n"
"Dump/Restore options:\n"
"\n"
"* Generic:\n"
"  -t|--tree PID         checkpoint a process tree identified by PID\n"
"  -d|--restore-detached detach after restore\n"
"  -S|--restore-sibling  restore root task as sibling\n"
"  -s|--leave-stopped    leave tasks in stopped state after checkpoint\n"
"  -R|--leave-running    leave tasks in running state after checkpoint\n"
"  -D|--images-dir DIR   directory for image files\n"
"     --pidfile FILE     write root task, service or page-server pid to FILE\n"
"  -W|--work-dir DIR     directory to cd and write logs/pidfiles/stats to\n"
"                        (if not specified, value of --images-dir is used)\n"
"     --cpu-cap [CAP]    require certain cpu capability. CAP: may be one of:\n"
"                        'cpu','fpu','all','ins','none'. To disable capability, prefix it with '^'.\n"
"     --exec-cmd         execute the command specified after '--' on successful\n"
"                        restore making it the parent of the restored process\n"
"  --freeze-cgroup\n"
"                        use cgroup freezer to collect processes\n"
"\n"
"* Special resources support:\n"
"  -x|--" USK_EXT_PARAM "inode,.." "      allow external unix connections (optionally can be assign socket's inode that allows one-sided dump)\n"
"     --" SK_EST_PARAM "  checkpoint/restore established TCP connections\n"
"  -r|--root PATH        change the root filesystem (when run in mount namespace)\n"
"  --evasive-devices     use any path to a device file if the original one\n"
"                        is inaccessible\n"
"  --veth-pair IN=OUT    map inside veth device name to outside one\n"
"                        can optionally append @<bridge-name> to OUT for moving\n"
"                        the outside veth to the named bridge\n"
"  --link-remap          allow one to link unlinked files back when possible\n"
"  --ghost-limit size    specify maximum size of deleted file contents to be carried inside an image file\n"
"  --action-script FILE  add an external action script\n"
"  -j|--" OPT_SHELL_JOB "        allow one to dump and restore shell jobs\n"
"  -l|--" OPT_FILE_LOCKS "       handle file locks, for safety, only used for container\n"
"  -L|--libdir           path to a plugin directory (by default " CR_PLUGIN_DEFAULT ")\n"
"  --force-irmap         force resolving names for inotify/fsnotify watches\n"
"  --irmap-scan-path FILE\n"
"                        add a path the irmap hints to scan\n"
"  -M|--ext-mount-map KEY:VALUE\n"
"                        add external mount mapping\n"
"  -M|--ext-mount-map auto\n"
"                        attempt to autodetect external mount mapings\n"
"  --enable-external-sharing\n"
"                        allow autoresolving mounts with external sharing\n"
"  --enable-external-masters\n"
"                        allow autoresolving mounts with external masters\n"
"  --manage-cgroups [m]  dump or restore cgroups the process is in usig mode:\n"
"                        'none', 'props', 'soft' (default), 'full' and 'strict'.\n"
"  --cgroup-root [controller:]/newroot\n"
"                        change the root cgroup the controller will be\n"
"                        installed into. No controller means that root is the\n"
"                        default for all controllers not specified.\n"
"  --skip-mnt PATH       ignore this mountpoint when dumping the mount namespace.\n"
"  --enable-fs FSNAMES   a comma separated list of filesystem names or \"all\".\n"
"                        force criu to (try to) dump/restore these filesystem's\n"
"                        mountpoints even if fs is not supported.\n"
"  --external RES        dump objects from this list as external resources:\n"
"                        Formats of RES:\n"
"                            tty[rdev:dev]\n"
"                            file[mnt_id:inode]\n"
"  --inherit-fd fd[<num>]:<existing>\n"
"                        Inherit file descriptors. This allows to treat file descriptor\n"
"                        <num> as being already opened via <existing> one and instead of\n"
"                        trying to open we inherit it:\n"
"                            tty[rdev:dev]\n"
"                            pipe[inode]\n"
"                            socket[inode]\n"
"                            file[mnt_id:inode]\n"
"  --empty-ns {net}\n"
"                        Create a namespace, but don't restore its properies.\n"
"                        An user will retore them from action scripts.\n"
"Check options:\n"
"  without any arguments, \"criu check\" checks availability of absolutely required\n"
"  kernel features; if any of these features is missing dump and restore will fail\n"
"  --extra               also check availability of extra kernel features\n"
"  --experimental        also check availability of experimental kernel features\n"
"  --all                 also check availability of extra and experimental kernel features\n"
"  --feature FEAT        only check availability of one of the following kernel features\n"
"                        "
	);
	check_add_feature("list");
	pr_msg(
"\n"
"* Logging:\n"
"  -o|--log-file FILE    log file name\n"
"     --log-pid          enable per-process logging to separate FILE.pid files\n"
"  -v[NUM]               set logging level (higher level means more output):\n"
"                          -v1|-v    - only errors and messages\n"
"                          -v2|-vv   - also warnings (default level)\n"
"                          -v3|-vvv  - also information messages and timestamps\n"
"                          -v4|-vvvv - lots of debug\n"
"\n"
"* Memory dumping options:\n"
"  --track-mem           turn on memory changes tracker in kernel\n"
"  --prev-images-dir DIR path to images from previous dump (relative to -D)\n"
"  --page-server         send pages to page server (see options below as well)\n"
"  --auto-dedup          when used on dump it will deduplicate \"old\" data in\n"
"                        pages images of previous dump\n"
"                        when used on restore, as soon as page is restored, it\n"
"                        will be punched from the image.\n"
"\n"
"Page/Service server options:\n"
"  --address ADDR        address of server or service\n"
"  --port PORT           port of page server\n"
"  -d|--daemon           run in the background after creating socket\n"
"\n"
"Other options:\n"
"  -h|--help             show this text\n"
"  -V|--version          show version\n"
	);

	return 0;

opt_pid_missing:
	pr_msg("Error: pid not specified\n");
	return 1;

bad_arg:
	if (idx < 0) /* short option */
		pr_msg("Error: invalid argument for -%c: %s\n",
				opt, optarg);
	else /* long option */
		pr_msg("Error: invalid argument for --%s: %s\n",
				long_opts[idx].name, optarg);
	return 1;
}
Exemplo n.º 5
0
int main(int argc, char *argv[], char *envp[])
{

#define BOOL_OPT(OPT_NAME, SAVE_TO) \
		{OPT_NAME, no_argument, SAVE_TO, true},\
		{"no-" OPT_NAME, no_argument, SAVE_TO, false}

	pid_t pid = 0, tree_id = 0;
	int ret = -1;
	bool usage_error = true;
	bool has_exec_cmd = false;
	bool has_sub_command;
	int opt, idx;
	int log_level = DEFAULT_LOGLEVEL;
	char *imgs_dir = ".";
	static const char short_opts[] = "dSsRf:F:t:p:hcD:o:v::x::Vr:jJ:lW:L:M:";
	static struct option long_opts[] = {
		{ "tree",			required_argument,	0, 't'	},
		{ "pid",			required_argument,	0, 'p'	},
		{ "leave-stopped",		no_argument,		0, 's'	},
		{ "leave-running",		no_argument,		0, 'R'	},
		BOOL_OPT("restore-detached", &opts.restore_detach),
		BOOL_OPT("restore-sibling", &opts.restore_sibling),
		BOOL_OPT("daemon", &opts.restore_detach),
		{ "contents",			no_argument,		0, 'c'	},
		{ "file",			required_argument,	0, 'f'	},
		{ "fields",			required_argument,	0, 'F'	},
		{ "images-dir",			required_argument,	0, 'D'	},
		{ "work-dir",			required_argument,	0, 'W'	},
		{ "log-file",			required_argument,	0, 'o'	},
		{ "join-ns",			required_argument,	0, 'J'	},
		{ "root",			required_argument,	0, 'r'	},
		{ USK_EXT_PARAM,		optional_argument,	0, 'x'	},
		{ "help",			no_argument,		0, 'h'	},
		BOOL_OPT(SK_EST_PARAM, &opts.tcp_established_ok),
		{ "close",			required_argument,	0, 1043	},
		BOOL_OPT("log-pid", &opts.log_file_per_pid),
		{ "version",			no_argument,		0, 'V'	},
		BOOL_OPT("evasive-devices", &opts.evasive_devices),
		{ "pidfile",			required_argument,	0, 1046	},
		{ "veth-pair",			required_argument,	0, 1047	},
		{ "action-script",		required_argument,	0, 1049	},
		BOOL_OPT(LREMAP_PARAM, &opts.link_remap_ok),
		BOOL_OPT(OPT_SHELL_JOB, &opts.shell_job),
		BOOL_OPT(OPT_FILE_LOCKS, &opts.handle_file_locks),
		BOOL_OPT("page-server", &opts.use_page_server),
		{ "address",			required_argument,	0, 1051	},
		{ "port",			required_argument,	0, 1052	},
		{ "prev-images-dir",		required_argument,	0, 1053	},
		{ "ms",				no_argument,		0, 1054	},
		BOOL_OPT("track-mem", &opts.track_mem),
		BOOL_OPT("auto-dedup", &opts.auto_dedup),
		{ "libdir",			required_argument,	0, 'L'	},
		{ "cpu-cap",			optional_argument,	0, 1057	},
		BOOL_OPT("force-irmap", &opts.force_irmap),
		{ "ext-mount-map",		required_argument,	0, 'M'	},
		{ "exec-cmd",			no_argument,		0, 1059	},
		{ "manage-cgroups",		optional_argument,	0, 1060	},
		{ "cgroup-root",		required_argument,	0, 1061	},
		{ "inherit-fd",			required_argument,	0, 1062	},
		{ "feature",			required_argument,	0, 1063	},
		{ "skip-mnt",			required_argument,	0, 1064 },
		{ "enable-fs",			required_argument,	0, 1065 },
		{ "enable-external-sharing", 	no_argument, 		&opts.enable_external_sharing, true	},
		{ "enable-external-masters", 	no_argument, 		&opts.enable_external_masters, true	},
		{ "freeze-cgroup",		required_argument,	0, 1068 },
		{ "ghost-limit",		required_argument,	0, 1069 },
		{ "irmap-scan-path",		required_argument,	0, 1070 },
		{ "lsm-profile",		required_argument,	0, 1071 },
		{ "timeout",			required_argument,	0, 1072 },
		{ "external",			required_argument,	0, 1073	},
		{ "empty-ns",			required_argument,	0, 1074	},
		BOOL_OPT("extra", &opts.check_extra_features),
		BOOL_OPT("experimental", &opts.check_experimental_features),
		{ "all",			no_argument,		0, 1079	},
		{ "cgroup-props",		required_argument,	0, 1080	},
		{ "cgroup-props-file",		required_argument,	0, 1081	},
		{ "cgroup-dump-controller",	required_argument,	0, 1082	},
		BOOL_OPT(SK_INFLIGHT_PARAM, &opts.tcp_skip_in_flight),
		BOOL_OPT("deprecated", &opts.deprecated_ok),
		BOOL_OPT("display-stats", &opts.display_stats),
		BOOL_OPT("weak-sysctls", &opts.weak_sysctls),
		{ "status-fd",			required_argument,	0, 1088 },
		{ },
	};

#undef BOOL_OPT

	BUILD_BUG_ON(PAGE_SIZE != PAGE_IMAGE_SIZE);
	BUILD_BUG_ON(CTL_32 != SYSCTL_TYPE__CTL_32);
	BUILD_BUG_ON(__CTL_STR != SYSCTL_TYPE__CTL_STR);

	if (fault_injection_init())
		return 1;

	cr_pb_init();
	setproctitle_init(argc, argv, envp);

	if (argc < 2)
		goto usage;

	init_opts();

	if (init_service_fd())
		return 1;

	if (!strcmp(argv[1], "swrk")) {
		if (argc < 3)
			goto usage;
		/*
		 * This is to start criu service worker from libcriu calls.
		 * The usage is "criu swrk <fd>" and is not for CLI/scripts.
		 * The arguments semantics can change at any time with the
		 * corresponding lib call change.
		 */
		opts.swrk_restore = true;
		return cr_service_work(atoi(argv[2]));
	}

	while (1) {
		idx = -1;
		opt = getopt_long(argc, argv, short_opts, long_opts, &idx);
		if (opt == -1)
			break;
		if (!opt)
			continue;

		switch (opt) {
		case 's':
			opts.final_state = TASK_STOPPED;
			break;
		case 'R':
			opts.final_state = TASK_ALIVE;
			break;
		case 'x':
			if (optarg && unix_sk_ids_parse(optarg) < 0)
				return 1;
			opts.ext_unix_sk = true;
			break;
		case 'p':
			pid = atoi(optarg);
			if (pid <= 0)
				goto bad_arg;
			break;
		case 't':
			tree_id = atoi(optarg);
			if (tree_id <= 0)
				goto bad_arg;
			break;
		case 'c':
			opts.show_pages_content	= true;
			break;
		case 'f':
			opts.show_dump_file = optarg;
			break;
		case 'F':
			opts.show_fmt = optarg;
			break;
		case 'r':
			opts.root = optarg;
			break;
		case 'd':
			opts.restore_detach = true;
			break;
		case 'S':
			opts.restore_sibling = true;
			break;
		case 'D':
			imgs_dir = optarg;
			break;
		case 'W':
			opts.work_dir = optarg;
			break;
		case 'o':
			opts.output = optarg;
			break;
		case 'J':
			if (parse_join_ns(optarg))
				goto bad_arg;
			break;
		case 'v':
			if (optarg) {
				if (optarg[0] == 'v')
					/* handle -vvvvv */
					log_level += strlen(optarg) + 1;
				else
					log_level = atoi(optarg);
			} else
				log_level++;
			break;
		case 1043: {
			int fd;

			fd = atoi(optarg);
			pr_info("Closing fd %d\n", fd);
			close(fd);
			break;
		}
		case 1046:
			opts.pidfile = optarg;
			break;
		case 1047:
			{
				char *aux;

				aux = strchr(optarg, '=');
				if (aux == NULL)
					goto bad_arg;

				*aux = '\0';
				if (veth_pair_add(optarg, aux + 1))
					return 1;
			}
			break;
		case 1049:
			if (add_script(optarg))
				return 1;

			break;
		case 1051:
			opts.addr = optarg;
			break;
		case 1052:
			opts.port = htons(atoi(optarg));
			if (!opts.port)
				goto bad_arg;
			break;
		case 'j':
			opts.shell_job = true;
			break;
		case 'l':
			opts.handle_file_locks = true;
			break;
		case 1053:
			opts.img_parent = optarg;
			break;
		case 1057:
			if (parse_cpu_cap(&opts, optarg))
				goto usage;
			break;
		case 1058:
			opts.force_irmap = true;
			break;
		case 1054:
			pr_err("--ms is deprecated; see \"Check options\" of criu --help\n");
			return 1;
		case 'L':
			opts.libdir = optarg;
			break;
		case 1059:
			has_exec_cmd = true;
			break;
		case 1060:
			if (parse_manage_cgroups(&opts, optarg))
				goto usage;
			break;
		case 1061:
			{
				char *path, *ctl;

				path = strchr(optarg, ':');
				if (path) {
					*path = '\0';
					path++;
					ctl = optarg;
				} else {
					path = optarg;
					ctl = NULL;
				}

				if (new_cg_root_add(ctl, path))
					return -1;
			}
			break;
		case 1062:
			if (inherit_fd_parse(optarg) < 0)
				return 1;
			break;
		case 1063:
			ret = check_add_feature(optarg);
			if (ret < 0)	/* invalid kernel feature name */
				return 1;
			if (ret > 0)	/* list kernel features and exit */
				return 0;
			break;
		case 1064:
			if (!add_skip_mount(optarg))
				return 1;
			break;
		case 1065:
			if (!add_fsname_auto(optarg))
				return 1;
			break;
		case 1068:
			opts.freeze_cgroup = optarg;
			break;
		case 1069:
			opts.ghost_limit = parse_size(optarg);
			break;
		case 1070:
			if (irmap_scan_path_add(optarg))
				return -1;
			break;
		case 1071:
			opts.lsm_profile = optarg;
			opts.lsm_supplied = true;
			break;
		case 1072:
			opts.timeout = atoi(optarg);
			break;
		case 'M':
			{
				char *aux;

				if (strcmp(optarg, "auto") == 0) {
					opts.autodetect_ext_mounts = true;
					break;
				}

				aux = strchr(optarg, ':');
				if (aux == NULL)
					goto bad_arg;

				*aux = '\0';
				if (ext_mount_add(optarg, aux + 1))
					return 1;
			}
			break;
		case 1073:
			if (add_external(optarg))
				return 1;
			break;
		case 1074:
			if (!strcmp("net", optarg))
				opts.empty_ns |= CLONE_NEWNET;
			else {
				pr_err("Unsupported empty namespace: %s\n",
						optarg);
				return 1;
			}
			break;
		case 1079:
			opts.check_extra_features = true;
			opts.check_experimental_features = true;
			break;
		case 1080:
			opts.cgroup_props = optarg;
			break;
		case 1081:
			opts.cgroup_props_file = optarg;
			break;
		case 1082:
			if (!cgp_add_dump_controller(optarg))
				return 1;
			break;
		case 1088:
			if (sscanf(optarg, "%d", &opts.status_fd) != 1) {
				pr_err("Unable to parse a value of --status-fd\n");
				return 1;
			}
			break;
		case 'V':
			pr_msg("Version: %s\n", CRIU_VERSION);
			if (strcmp(CRIU_GITID, "0"))
				pr_msg("GitID: %s\n", CRIU_GITID);
			return 0;
		case 'h':
			usage_error = false;
			goto usage;
		default:
			goto usage;
		}
	}

	if (opts.deprecated_ok)
		pr_msg("Turn deprecated stuff ON\n");
	if (opts.tcp_skip_in_flight)
		pr_msg("Will skip in-flight TCP connections\n");
	if (opts.tcp_established_ok)
		pr_info("Will dump TCP connections\n");
	if (opts.link_remap_ok)
		pr_info("Will allow link remaps on FS\n");
	if (opts.weak_sysctls)
		pr_msg("Will skip non-existant sysctls on restore\n");

	if (getenv("CRIU_DEPRECATED")) {
		pr_msg("Turn deprecated stuff ON via env\n");
		opts.deprecated_ok = true;
	}

	if (check_namespace_opts()) {
		pr_msg("Error: namespace flags conflict\n");
		return 1;
	}

	if (!opts.restore_detach && opts.restore_sibling) {
		pr_msg("--restore-sibling only makes sense with --restore-detach\n");
		return 1;
	}

	if (opts.work_dir == NULL)
		opts.work_dir = imgs_dir;

	if (optind >= argc) {
		pr_msg("Error: command is required\n");
		goto usage;
	}

	if (!strcmp(argv[optind], "exec")) {
		pr_msg("The \"exec\" action is deprecated by the Compel library.\n");
		return -1;
	}

	has_sub_command = (argc - optind) > 1;

	if (has_exec_cmd) {
		if (!has_sub_command) {
			pr_msg("Error: --exec-cmd requires a command\n");
			goto usage;
		}

		if (strcmp(argv[optind], "restore")) {
			pr_msg("Error: --exec-cmd is available for the restore command only\n");
			goto usage;
		}

		if (opts.restore_detach) {
			pr_msg("Error: --restore-detached and --exec-cmd cannot be used together\n");
			goto usage;
		}

		opts.exec_cmd = xmalloc((argc - optind) * sizeof(char *));
		if (!opts.exec_cmd)
			return 1;
		memcpy(opts.exec_cmd, &argv[optind + 1], (argc - optind - 1) * sizeof(char *));
		opts.exec_cmd[argc - optind - 1] = NULL;
	} else {
		/* No subcommands except for cpuinfo and restore --exec-cmd */
		if (strcmp(argv[optind], "cpuinfo") && has_sub_command) {
			pr_msg("Error: excessive parameter%s for command %s\n",
				(argc - optind) > 2 ? "s" : "", argv[optind]);
			goto usage;
		}
	}

	/* We must not open imgs dir, if service is called */
	if (strcmp(argv[optind], "service")) {
		ret = open_image_dir(imgs_dir);
		if (ret < 0)
			return 1;
	}

	/*
	 * When a process group becomes an orphan,
	 * its processes are sent a SIGHUP signal
	 */
	if (!strcmp(argv[optind], "restore") &&
			opts.restore_detach &&
			opts.final_state == TASK_STOPPED &&
			opts.shell_job)
		pr_warn("Stopped and detached shell job will get SIGHUP from OS.");

	if (chdir(opts.work_dir)) {
		pr_perror("Can't change directory to %s", opts.work_dir);
		return 1;
	}

	log_set_loglevel(log_level);

	if (log_init(opts.output))
		return 1;
	libsoccr_set_log(log_level, print_on_level);
	compel_log_init(vprint_on_level, log_get_loglevel());

	pr_debug("Version: %s (gitid %s)\n", CRIU_VERSION, CRIU_GITID);
	if (opts.deprecated_ok)
		pr_debug("DEPRECATED ON\n");

	if (!list_empty(&opts.inherit_fds)) {
		if (strcmp(argv[optind], "restore")) {
			pr_err("--inherit-fd is restore-only option\n");
			return 1;
		}
		/* now that log file is set up, print inherit fd list */
		inherit_fd_log();
	}

	if (opts.img_parent)
		pr_info("Will do snapshot from %s\n", opts.img_parent);

	if (!strcmp(argv[optind], "dump")) {
		if (!tree_id)
			goto opt_pid_missing;
		return cr_dump_tasks(tree_id);
	}

	if (!strcmp(argv[optind], "pre-dump")) {
		if (!tree_id)
			goto opt_pid_missing;

		return cr_pre_dump_tasks(tree_id) != 0;
	}

	if (!strcmp(argv[optind], "restore")) {
		if (tree_id)
			pr_warn("Using -t with criu restore is obsoleted\n");

		ret = cr_restore_tasks();
		if (ret == 0 && opts.exec_cmd) {
			close_pid_proc();
			execvp(opts.exec_cmd[0], opts.exec_cmd);
			pr_perror("Failed to exec command %s", opts.exec_cmd[0]);
			ret = 1;
		}

		return ret != 0;
	}

	if (!strcmp(argv[optind], "show")) {
		pr_msg("The \"show\" action is deprecated by the CRIT utility.\n");
		pr_msg("To view an image use the \"crit decode -i $name --pretty\" command.\n");
		return -1;
	}

	if (!strcmp(argv[optind], "check"))
		return cr_check() != 0;

	if (!strcmp(argv[optind], "page-server"))
		return cr_page_server(opts.daemon_mode, -1) != 0;

	if (!strcmp(argv[optind], "service"))
		return cr_service(opts.daemon_mode);

	if (!strcmp(argv[optind], "dedup"))
		return cr_dedup() != 0;

	if (!strcmp(argv[optind], "cpuinfo")) {
		if (!argv[optind + 1]) {
			pr_msg("Error: cpuinfo requires an action: dump or check\n");
			goto usage;
		}
		if (!strcmp(argv[optind + 1], "dump"))
			return cpuinfo_dump();
		else if (!strcmp(argv[optind + 1], "check"))
			return cpuinfo_check();
	}

	pr_msg("Error: unknown command: %s\n", argv[optind]);
usage:
	pr_msg("\n"
"Usage:\n"
"  criu dump|pre-dump -t PID [<options>]\n"
"  criu restore [<options>]\n"
"  criu check [--feature FEAT]\n"
"  criu page-server\n"
"  criu service [<options>]\n"
"  criu dedup\n"
"\n"
"Commands:\n"
"  dump           checkpoint a process/tree identified by pid\n"
"  pre-dump       pre-dump task(s) minimizing their frozen time\n"
"  restore        restore a process/tree\n"
"  check          checks whether the kernel support is up-to-date\n"
"  page-server    launch page server\n"
"  service        launch service\n"
"  dedup          remove duplicates in memory dump\n"
"  cpuinfo dump   writes cpu information into image file\n"
"  cpuinfo check  validates cpu information read from image file\n"
	);

	if (usage_error) {
		pr_msg("\nTry -h|--help for more info\n");
		return 1;
	}

	pr_msg("\n"

"Most of the true / false long options (the ones without arguments) can be\n"
"prefixed with --no- to negate the option (example: --display-stats and\n"
"--no-display-stats).\n"
"\n"
"Dump/Restore options:\n"
"\n"
"* Generic:\n"
"  -t|--tree PID         checkpoint a process tree identified by PID\n"
"  -d|--restore-detached detach after restore\n"
"  -S|--restore-sibling  restore root task as sibling\n"
"  -s|--leave-stopped    leave tasks in stopped state after checkpoint\n"
"  -R|--leave-running    leave tasks in running state after checkpoint\n"
"  -D|--images-dir DIR   directory for image files\n"
"     --pidfile FILE     write root task, service or page-server pid to FILE\n"
"  -W|--work-dir DIR     directory to cd and write logs/pidfiles/stats to\n"
"                        (if not specified, value of --images-dir is used)\n"
"     --cpu-cap [CAP]    CPU capabilities to write/check. CAP is comma-separated\n"
"                        list of: cpu, fpu, all, ins, none. To disable\n"
"                        a capability, use ^CAP. Empty argument implies all\n"
"     --exec-cmd         execute the command specified after '--' on successful\n"
"                        restore making it the parent of the restored process\n"
"  --freeze-cgroup       use cgroup freezer to collect processes\n"
"  --weak-sysctls        skip restoring sysctls that are not available\n"
"\n"
"* External resources support:\n"
"  --external RES        dump objects from this list as external resources:\n"
"                        Formats of RES on dump:\n"
"                            tty[rdev:dev]\n"
"                            file[mnt_id:inode]\n"
"                            dev[major/minor]:NAME\n"
"                            unix[ino]\n"
"                            mnt[MOUNTPOINT]:COOKIE\n"
"                            mnt[]{:AUTO_OPTIONS}\n"
"                        Formats of RES on restore:\n"
"                            dev[NAME]:DEVPATH\n"
"                            veth[IFNAME]:OUTNAME{@BRIDGE}\n"
"                            macvlan[IFNAME]:OUTNAME\n"
"                            mnt[COOKIE]:ROOT\n"
"\n"
"* Special resources support:\n"
"     --" SK_EST_PARAM "  checkpoint/restore established TCP connections\n"
"     --" SK_INFLIGHT_PARAM "   skip (ignore) in-flight TCP connections\n"
"  -r|--root PATH        change the root filesystem (when run in mount namespace)\n"
"  --evasive-devices     use any path to a device file if the original one\n"
"                        is inaccessible\n"
"  --link-remap          allow one to link unlinked files back when possible\n"
"  --ghost-limit size    limit max size of deleted file contents inside image\n"
"  --action-script FILE  add an external action script\n"
"  -j|--" OPT_SHELL_JOB "        allow one to dump and restore shell jobs\n"
"  -l|--" OPT_FILE_LOCKS "       handle file locks, for safety, only used for container\n"
"  -L|--libdir           path to a plugin directory (by default " CR_PLUGIN_DEFAULT ")\n"
"  --force-irmap         force resolving names for inotify/fsnotify watches\n"
"  --irmap-scan-path FILE\n"
"                        add a path the irmap hints to scan\n"
"  --manage-cgroups [m]  dump/restore process' cgroups; argument can be one of\n"
"                        'none', 'props', 'soft' (default), 'full' or 'strict'\n"
"  --cgroup-root [controller:]/newroot\n"
"                        on dump: change the root for the controller that will\n"
"                        be dumped. By default, only the paths with tasks in\n"
"                        them and below will be dumped.\n"
"                        on restore: change the root cgroup the controller will\n"
"                        be installed into. No controller means that root is the\n"
"                        default for all controllers not specified\n"
"  --cgroup-props STRING\n"
"                        define cgroup controllers and properties\n"
"                        to be checkpointed, which are described\n"
"                        via STRING using simplified YAML format\n"
"  --cgroup-props-file FILE\n"
"                        same as --cgroup-props, but taking description\n"
"                        from the path specified\n"
"  --cgroup-dump-controller NAME\n"
"                        define cgroup controller to be dumped\n"
"                        and skip anything else present in system\n"
"  --skip-mnt PATH       ignore this mountpoint when dumping the mount namespace\n"
"  --enable-fs FSNAMES   a comma separated list of filesystem names or \"all\"\n"
"                        force criu to (try to) dump/restore these filesystem's\n"
"                        mountpoints even if fs is not supported\n"
"  --inherit-fd fd[NUM]:RES\n"
"                        Inherit file descriptors, treating fd NUM as being\n"
"                        already opened via an existing RES, which can be:\n"
"                            tty[rdev:dev]\n"
"                            pipe[inode]\n"
"                            socket[inode]\n"
"                            file[mnt_id:inode]\n"
"                            path/to/file\n"
"  --empty-ns net        Create a namespace, but don't restore its properties\n"
"                        (assuming it will be restored by action scripts)\n"
"  -J|--join-ns NS:{PID|NS_FILE}[,OPTIONS]\n"
"			Join existing namespace and restore process in it.\n"
"			Namespace can be specified as either pid or file path.\n"
"			OPTIONS can be used to specify parameters for userns:\n"
"			    user:PID,UID,GID\n"
"\n"
"Check options:\n"
"  Without options, \"criu check\" checks availability of absolutely required\n"
"  kernel features, critical for performing dump and restore.\n"
"  --extra               add check for extra kernel features\n"
"  --experimental        add check for experimental kernel features\n"
"  --all                 same as --extra --experimental\n"
"  --feature FEAT        only check a particular feature, one of:"
	);
	pr_check_features("                            ", ", ", 80);
	pr_msg(
"\n"
"* Logging:\n"
"  -o|--log-file FILE    log file name\n"
"     --log-pid          enable per-process logging to separate FILE.pid files\n"
"  -v[v...]            increase verbosity (can use multiple v)\n"
"  -vNUM               set verbosity to NUM (higher level means more output):\n"
"                          -v1 - only errors and messages\n"
"                          -v2 - also warnings (default level)\n"
"                          -v3 - also information messages and timestamps\n"
"                          -v4 - lots of debug\n"
"  --display-stats       print out dump/restore stats\n"
"\n"
"* Memory dumping options:\n"
"  --track-mem           turn on memory changes tracker in kernel\n"
"  --prev-images-dir DIR path to images from previous dump (relative to -D)\n"
"  --page-server         send pages to page server (see options below as well)\n"
"  --auto-dedup          when used on dump it will deduplicate \"old\" data in\n"
"                        pages images of previous dump\n"
"                        when used on restore, as soon as page is restored, it\n"
"                        will be punched from the image\n"
"\n"
"Page/Service server options:\n"
"  --address ADDR        address of server or service\n"
"  --port PORT           port of page server\n"
"  -d|--daemon           run in the background after creating socket\n"
"  --status-fd FD        write \\0 to the FD and close it once process is ready\n"
"                        to handle requests\n"
"\n"
"Other options:\n"
"  -h|--help             show this text\n"
"  -V|--version          show version\n"
	);

	return 0;

opt_pid_missing:
	pr_msg("Error: pid not specified\n");
	return 1;

bad_arg:
	if (idx < 0) /* short option */
		pr_msg("Error: invalid argument for -%c: %s\n",
				opt, optarg);
	else /* long option */
		pr_msg("Error: invalid argument for --%s: %s\n",
				long_opts[idx].name, optarg);
	return 1;
}