vserver 1.9.3

[linux-2.6.git] / include / linux / tty_ldisc.h

diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index cb7ca58..deacf01 100644 (file)
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -95,6 +95,13 @@
  *     that line discpline should try to send more characters to the
  *     low-level driver for transmission.  If the line discpline does
  *     not have any more data to send, it can just return.
+ *
+ * int (*hangup)(struct tty_struct *)
+ *
+ *     Called on a hangup. Tells the discipline that it should
+ *     cease I/O to the tty driver. Can sleep. The driver should
+ *     seek to perform this action quickly but should wait until
+ *     any pending driver I/O is completed.
  */
 
 #include <linux/fs.h>
@@ -122,6 +129,7 @@ struct tty_ldisc {
        void    (*set_termios)(struct tty_struct *tty, struct termios * old);
        unsigned int (*poll)(struct tty_struct *, struct file *,
                             struct poll_table_struct *);
+       int     (*hangup)(struct tty_struct *tty);
        
        /*
         * The following routines are called from below.
@@ -132,6 +140,8 @@ struct tty_ldisc {
        void    (*write_wakeup)(struct tty_struct *);
 
        struct  module *owner;
+       
+       int refcount;
 };
 
 #define TTY_LDISC_MAGIC        0x5403