tty: shutdown method

[linux-2.6-omap-h63xx.git] / include / linux / tty.h

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 0cbec74ec0865af37673d58cbd435d7c39475279..6e39c705b9b67e9b111d36cd661a8325b2166d3a 100644 (file)
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -23,7 +23,7 @@
  */
 #define NR_UNIX98_PTY_DEFAULT  4096      /* Default maximum for Unix98 ptys */
 #define NR_UNIX98_PTY_MAX      (1 << MINORBITS) /* Absolute limit */
-#define NR_LDISCS              18
+#define NR_LDISCS              19
 
 /* line disciplines */
 #define N_TTY          0
@@ -45,6 +45,7 @@
 #define N_HCI          15      /* Bluetooth HCI UART */
 #define N_GIGASET_M101 16      /* Siemens Gigaset M101 serial DECT adapter */
 #define N_SLCAN                17      /* Serial / USB serial CAN Adaptors */
+#define N_PPS          18      /* Pulse per Second */
 
 /*
  * This character is the same as _POSIX_VDISABLE: it cannot be used as
@@ -181,6 +182,7 @@ struct signal_struct;
 
 struct tty_port {
        struct tty_struct       *tty;           /* Back pointer */
+       spinlock_t              lock;           /* Lock protecting tty field */
        int                     blocked_open;   /* Waiting to open */
        int                     count;          /* Usage count */
        wait_queue_head_t       open_wait;      /* Open waiters */
@@ -208,6 +210,7 @@ struct tty_operations;
 
 struct tty_struct {
        int     magic;
+       struct kref kref;
        struct tty_driver *driver;
        const struct tty_operations *ops;
        int index;
@@ -217,6 +220,7 @@ struct tty_struct {
        spinlock_t ctrl_lock;
        /* Termios values are protected by the termios mutex */
        struct ktermios *termios, *termios_locked;
+       struct termiox *termiox;        /* May be NULL for unsupported */
        char name[64];
        struct pid *pgrp;               /* Protected by ctrl lock */
        struct pid *session;
@@ -310,6 +314,23 @@ extern int kmsg_redirect;
 extern void console_init(void);
 extern int vcs_init(void);
 
+/**
+ *     tty_kref_get            -       get a tty reference
+ *     @tty: tty device
+ *
+ *     Return a new reference to a tty object. The caller must hold
+ *     sufficient locks/counts to ensure that their existing reference cannot
+ *     go away
+ */
+
+extern inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
+{
+       if (tty)
+               kref_get(&tty->kref);
+       return tty;
+}
+extern void tty_kref_put(struct tty_struct *tty);
+
 extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
                              const char *routine);
 extern char *tty_name(struct tty_struct *tty, char *buf);
@@ -333,13 +354,15 @@ 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 void tty_shutdown(struct tty_struct *tty);
+extern void tty_free_termios(struct tty_struct *tty);
 extern int is_current_pgrp_orphaned(void);
 extern struct pid *tty_get_pgrp(struct tty_struct *tty);
 extern int is_ignored(int sig);
 extern int tty_signal(int sig, struct tty_struct *tty);
 extern void tty_hangup(struct tty_struct *tty);
 extern void tty_vhangup(struct tty_struct *tty);
+extern void tty_vhangup_self(void);
 extern void tty_unhangup(struct file *filp);
 extern int tty_hung_up_p(struct file *filp);
 extern void do_SAK(struct tty_struct *tty);
@@ -347,6 +370,9 @@ extern void __do_SAK(struct tty_struct *tty);
 extern void disassociate_ctty(int priv);
 extern void no_tty(void);
 extern void tty_flip_buffer_push(struct tty_struct *tty);
+extern void tty_buffer_free_all(struct tty_struct *tty);
+extern void tty_buffer_flush(struct tty_struct *tty);
+extern void tty_buffer_init(struct tty_struct *tty);
 extern speed_t tty_get_baud_rate(struct tty_struct *tty);
 extern speed_t tty_termios_baud_rate(struct ktermios *termios);
 extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
@@ -382,6 +408,8 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay);
 extern void tty_port_init(struct tty_port *port);
 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_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
 extern int tty_unregister_ldisc(int disc);