1 files changed, 29 insertions, 2 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index eaec37c9d83d..fc39db95499f 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -180,8 +180,17 @@ struct signal_struct;
  * until a hangup so don't use the wrong path.
  */
 
+struct tty_port;
+
+struct tty_port_operations {
+        /* Return 1 if the carrier is raised */
+        int (*carrier_raised)(struct tty_port *port);
+        void (*raise_dtr_rts)(struct tty_port *port);
+};
+        
 struct tty_port {
         struct tty_struct       *tty;           /* Back pointer */
+        const struct tty_port_operations *ops;  /* Port operations */
         spinlock_t              lock;           /* Lock protecting tty field */
         int                     blocked_open;   /* Waiting to open */
         int                     count;          /* Usage count */
@@ -253,6 +262,7 @@ struct tty_struct {
         unsigned int column;
         unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
         unsigned char closing:1;
+        unsigned char echo_overrun:1;
         unsigned short minimum_to_wake;
         unsigned long overrun_time;
         int num_overrun;
@@ -262,11 +272,16 @@ struct tty_struct {
         int read_tail;
         int read_cnt;
         unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
+        unsigned char *echo_buf;
+        unsigned int echo_pos;
+        unsigned int echo_cnt;
         int canon_data;
         unsigned long canon_head;
         unsigned int canon_column;
         struct mutex atomic_read_lock;
         struct mutex atomic_write_lock;
+        struct mutex output_lock;
+        struct mutex echo_lock;
         unsigned char *write_buf;
         int write_cnt;
         spinlock_t read_lock;
@@ -295,6 +310,7 @@ struct tty_struct {
 #define TTY_PUSH                6       /* n_tty private */
 #define TTY_CLOSING             7       /* ->close() in progress */
 #define TTY_LDISC               9       /* Line discipline attached */
+#define TTY_LDISC_CHANGING      10      /* Line discipline changing */
 #define TTY_HW_COOK_OUT         14      /* Hardware can do output cooking */
 #define TTY_HW_COOK_IN          15      /* Hardware can do input cooking */
 #define TTY_PTY_LOCK            16      /* pty private */
@@ -354,8 +370,7 @@ extern int tty_write_room(struct tty_struct *tty);
 extern void tty_driver_flush_buffer(struct tty_struct *tty);
 extern void tty_throttle(struct tty_struct *tty);
 extern void tty_unthrottle(struct tty_struct *tty);
-extern int tty_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
-                                                struct winsize *ws);
+extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
 extern void tty_shutdown(struct tty_struct *tty);
 extern void tty_free_termios(struct tty_struct *tty);
 extern int is_current_pgrp_orphaned(void);
@@ -421,6 +436,14 @@ extern int tty_port_alloc_xmit_buf(struct tty_port *port);
 extern void tty_port_free_xmit_buf(struct tty_port *port);
 extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
 extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
+extern int tty_port_carrier_raised(struct tty_port *port);
+extern void tty_port_raise_dtr_rts(struct tty_port *port);
+extern void tty_port_hangup(struct tty_port *port);
+extern int tty_port_block_til_ready(struct tty_port *port,
+                                struct tty_struct *tty, struct file *filp);
+extern int tty_port_close_start(struct tty_port *port,
+                                struct tty_struct *tty, struct file *filp);
+extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
 
 extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
 extern int tty_unregister_ldisc(int disc);
@@ -442,6 +465,7 @@ extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
                                size_t size);
 extern void tty_audit_exit(void);
 extern void tty_audit_fork(struct signal_struct *sig);
+extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
 extern void tty_audit_push(struct tty_struct *tty);
 extern void tty_audit_push_task(struct task_struct *tsk,
                                         uid_t loginuid, u32 sessionid);
@@ -450,6 +474,9 @@ static inline void tty_audit_add_data(struct tty_struct *tty,
                                       unsigned char *data, size_t size)
 {
 }
+static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
+{
+}
 static inline void tty_audit_exit(void)
 {
 }