void save_cpr_snapshot(const char *file, const char *mode, Error **errp)
{
    int ret = 0;
    QEMUFile *f;
    VMStateMode op;

    if (!strcmp(mode, "reboot")) {
        op = VMS_REBOOT;
    } else if (!strcmp(mode, "restart")) {
        op = VMS_RESTART;
    } else {
        error_setg(errp, "cprsave: bad mode %s", mode);
        return;
    }

    if (op == VMS_REBOOT && qemu_ram_volatile(errp)) {
        return;
    }

    if (op == VMS_RESTART && QEMU_MADV_DOEXEC == QEMU_MADV_INVALID) {
        error_setg(errp, "kernel does not support MADV_DOEXEC.");
        return;
    }

    if (op == VMS_RESTART && xen_enabled()) {
        error_setg(errp, "xen does not support cprsave restart");
        return;
    }

    f = qf_file_open(file, O_CREAT | O_WRONLY | O_TRUNC, 0600, errp);
    if (!f) {
        return;
    }

    ret = global_state_store();
    if (ret) {
        error_setg(errp, "Error saving global state");
        qemu_fclose(f);
        return;
    }

    /* Update timers_state before saving.  Suspend did not so do. */
    if (runstate_check(RUN_STATE_SUSPENDED)) {
        cpu_disable_ticks();
    }

    vm_stop(RUN_STATE_SAVE_VM);

    ret = qemu_savevm_state(f, op, errp);
    if ((ret < 0) && !*errp) {
        error_setg(errp, "qemu_savevm_state failed");
    }
    qemu_fclose(f);

    if (op == VMS_REBOOT) {
        no_shutdown = 0;
        qemu_system_shutdown_request();
    } else if (op == VMS_RESTART) {
        if (qemu_preserve_ram(errp)) {
            return;
        }
        save_chardev_fds();
        save_vnc_fds();
        save_named_fd("mntfd");          /* was received from qemu-cpr */
        save_named_fd("ctlfd");          /* was received from qemu-cpr */
        walkenv(FD_PREFIX, preserve_fd, 0);
        reset_vhost_devices();
        save_qmp_negotiation_status();
        qemu_term_exit();
        qemu_system_exec_request();
        putenv((char *)"QEMU_START_FREEZE=");
    }
}