+#ifndef TCGETS2
+ case TIOCGLCKTRMIOS:
+ if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios_locked))
+ return -EFAULT;
+ return 0;
+
+ case TIOCSLCKTRMIOS:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (user_termios_to_kernel_termios(real_tty->termios_locked, (struct termios __user *) arg))
+ return -EFAULT;
+ return 0;
+#else
+ case TIOCGLCKTRMIOS:
+ if (kernel_termios_to_user_termios_1((struct termios __user *)arg, real_tty->termios_locked))
+ return -EFAULT;
+ return 0;
+
+ case TIOCSLCKTRMIOS:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (user_termios_to_kernel_termios_1(real_tty->termios_locked, (struct termios __user *) arg))
+ return -EFAULT;
+ return 0;
+#endif
+ case TIOCGSOFTCAR:
+ return put_user(C_CLOCAL(tty) ? 1 : 0, (int __user *)arg);
+ case TIOCSSOFTCAR:
+ if (get_user(arg, (unsigned int __user *) arg))
+ return -EFAULT;
+ mutex_lock(&tty->termios_mutex);
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ mutex_unlock(&tty->termios_mutex);
+ return 0;
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+EXPORT_SYMBOL_GPL(tty_mode_ioctl);
+
+int tty_perform_flush(struct tty_struct *tty, unsigned long arg)
+{
+ struct tty_ldisc *ld;
+ int retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+
+ ld = tty_ldisc_ref(tty);
+ switch (arg) {
+ case TCIFLUSH:
+ if (ld && ld->flush_buffer)
+ ld->flush_buffer(tty);
+ break;
+ case TCIOFLUSH:
+ if (ld && ld->flush_buffer)
+ ld->flush_buffer(tty);
+ /* fall through */
+ case TCOFLUSH:
+ if (tty->driver->flush_buffer)
+ tty->driver->flush_buffer(tty);
+ break;
+ default:
+ tty_ldisc_deref(ld);
+ return -EINVAL;
+ }
+ tty_ldisc_deref(ld);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(tty_perform_flush);
+
+int n_tty_ioctl(struct tty_struct * tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct tty_struct * real_tty;
+ int retval;
+
+ if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
+ tty->driver->subtype == PTY_TYPE_MASTER)
+ real_tty = tty->link;
+ else
+ real_tty = tty;
+
+ switch (cmd) {