LCOV - code coverage report
Current view: top level - include/linux - tty.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 5 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       1             : #ifndef _LINUX_TTY_H
       2             : #define _LINUX_TTY_H
       3             : 
       4             : /*
       5             :  * 'tty.h' defines some structures used by tty_io.c and some defines.
       6             :  */
       7             : 
       8             : #ifdef __KERNEL__
       9             : #include <linux/fs.h>
      10             : #include <linux/major.h>
      11             : #include <linux/termios.h>
      12             : #include <linux/workqueue.h>
      13             : #include <linux/tty_driver.h>
      14             : #include <linux/tty_ldisc.h>
      15             : #include <linux/mutex.h>
      16             : 
      17             : #include <asm/system.h>
      18             : 
      19             : 
      20             : /*
      21             :  * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
      22             :  * hardcoded at present.)
      23             :  */
      24             : #define NR_UNIX98_PTY_DEFAULT   4096      /* Default maximum for Unix98 ptys */
      25             : #define NR_UNIX98_PTY_MAX       (1 << MINORBITS) /* Absolute limit */
      26             : #define NR_LDISCS               20
      27             : 
      28             : /* line disciplines */
      29             : #define N_TTY           0
      30             : #define N_SLIP          1
      31             : #define N_MOUSE         2
      32             : #define N_PPP           3
      33             : #define N_STRIP         4
      34             : #define N_AX25          5
      35             : #define N_X25           6       /* X.25 async */
      36             : #define N_6PACK         7
      37             : #define N_MASC          8       /* Reserved for Mobitex module <kaz@cafe.net> */
      38             : #define N_R3964         9       /* Reserved for Simatic R3964 module */
      39             : #define N_PROFIBUS_FDL  10      /* Reserved for Profibus */
      40             : #define N_IRDA          11      /* Linux IrDa - http://irda.sourceforge.net/ */
      41             : #define N_SMSBLOCK      12      /* SMS block mode - for talking to GSM data */
      42             :                                 /* cards about SMS messages */
      43             : #define N_HDLC          13      /* synchronous HDLC */
      44             : #define N_SYNC_PPP      14      /* synchronous PPP */
      45             : #define N_HCI           15      /* Bluetooth HCI UART */
      46             : #define N_GIGASET_M101  16      /* Siemens Gigaset M101 serial DECT adapter */
      47             : #define N_SLCAN         17      /* Serial / USB serial CAN Adaptors */
      48             : #define N_PPS           18      /* Pulse per Second */
      49             : 
      50             : #define N_V253          19      /* Codec control over voice modem */
      51             : 
      52             : /*
      53             :  * This character is the same as _POSIX_VDISABLE: it cannot be used as
      54             :  * a c_cc[] character, but indicates that a particular special character
      55             :  * isn't in use (eg VINTR has no character etc)
      56             :  */
      57             : #define __DISABLED_CHAR '\0'
      58             : 
      59             : struct tty_buffer {
      60             :         struct tty_buffer *next;
      61             :         char *char_buf_ptr;
      62             :         unsigned char *flag_buf_ptr;
      63             :         int used;
      64             :         int size;
      65             :         int commit;
      66             :         int read;
      67             :         /* Data points here */
      68             :         unsigned long data[0];
      69             : };
      70           1 : 
      71             : /*
      72             :  * We default to dicing tty buffer allocations to this many characters
      73             :  * in order to avoid multiple page allocations. We know the size of
      74             :  * tty_buffer itself but it must also be taken into account that the
      75             :  * the buffer is 256 byte aligned. See tty_buffer_find for the allocation
      76             :  * logic this must match
      77             :  */
      78             : 
      79             : #define TTY_BUFFER_PAGE (((PAGE_SIZE - sizeof(struct tty_buffer)) / 2) & ~0xFF)
      80             : 
      81             : 
      82             : struct tty_bufhead {
      83             :         struct delayed_work work;
      84             :         spinlock_t lock;
      85             :         struct tty_buffer *head;        /* Queue head */
      86             :         struct tty_buffer *tail;        /* Active buffer */
      87             :         struct tty_buffer *free;        /* Free queue head */
      88             :         int memory_used;                /* Buffer space used excluding
      89             :                                                                 free queue */
      90           1 : };
      91           1 : /*
      92             :  * When a break, frame error, or parity error happens, these codes are
      93             :  * stuffed into the flags buffer.
      94             :  */
      95             : #define TTY_NORMAL      0
      96             : #define TTY_BREAK       1
      97             : #define TTY_FRAME       2
      98             : #define TTY_PARITY      3
      99             : #define TTY_OVERRUN     4
     100             : 
     101             : #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
     102             : #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
     103             : #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
     104             : #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
     105             : #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
     106             : #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
     107             : #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
     108             : #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
     109             : #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
     110             : #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
     111             : #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
     112             : #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
     113             : #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
     114             : #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
     115             : #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
     116             : #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
     117             : #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
     118             : 
     119             : #define _I_FLAG(tty, f) ((tty)->termios->c_iflag & (f))
     120             : #define _O_FLAG(tty, f) ((tty)->termios->c_oflag & (f))
     121             : #define _C_FLAG(tty, f) ((tty)->termios->c_cflag & (f))
     122             : #define _L_FLAG(tty, f) ((tty)->termios->c_lflag & (f))
     123             : 
     124             : #define I_IGNBRK(tty)   _I_FLAG((tty), IGNBRK)
     125             : #define I_BRKINT(tty)   _I_FLAG((tty), BRKINT)
     126             : #define I_IGNPAR(tty)   _I_FLAG((tty), IGNPAR)
     127             : #define I_PARMRK(tty)   _I_FLAG((tty), PARMRK)
     128             : #define I_INPCK(tty)    _I_FLAG((tty), INPCK)
     129             : #define I_ISTRIP(tty)   _I_FLAG((tty), ISTRIP)
     130             : #define I_INLCR(tty)    _I_FLAG((tty), INLCR)
     131             : #define I_IGNCR(tty)    _I_FLAG((tty), IGNCR)
     132             : #define I_ICRNL(tty)    _I_FLAG((tty), ICRNL)
     133             : #define I_IUCLC(tty)    _I_FLAG((tty), IUCLC)
     134             : #define I_IXON(tty)     _I_FLAG((tty), IXON)
     135             : #define I_IXANY(tty)    _I_FLAG((tty), IXANY)
     136             : #define I_IXOFF(tty)    _I_FLAG((tty), IXOFF)
     137             : #define I_IMAXBEL(tty)  _I_FLAG((tty), IMAXBEL)
     138             : #define I_IUTF8(tty)    _I_FLAG((tty), IUTF8)
     139             : 
     140             : #define O_OPOST(tty)    _O_FLAG((tty), OPOST)
     141             : #define O_OLCUC(tty)    _O_FLAG((tty), OLCUC)
     142             : #define O_ONLCR(tty)    _O_FLAG((tty), ONLCR)
     143             : #define O_OCRNL(tty)    _O_FLAG((tty), OCRNL)
     144             : #define O_ONOCR(tty)    _O_FLAG((tty), ONOCR)
     145             : #define O_ONLRET(tty)   _O_FLAG((tty), ONLRET)
     146             : #define O_OFILL(tty)    _O_FLAG((tty), OFILL)
     147             : #define O_OFDEL(tty)    _O_FLAG((tty), OFDEL)
     148             : #define O_NLDLY(tty)    _O_FLAG((tty), NLDLY)
     149             : #define O_CRDLY(tty)    _O_FLAG((tty), CRDLY)
     150             : #define O_TABDLY(tty)   _O_FLAG((tty), TABDLY)
     151             : #define O_BSDLY(tty)    _O_FLAG((tty), BSDLY)
     152             : #define O_VTDLY(tty)    _O_FLAG((tty), VTDLY)
     153             : #define O_FFDLY(tty)    _O_FLAG((tty), FFDLY)
     154             : 
     155             : #define C_BAUD(tty)     _C_FLAG((tty), CBAUD)
     156             : #define C_CSIZE(tty)    _C_FLAG((tty), CSIZE)
     157             : #define C_CSTOPB(tty)   _C_FLAG((tty), CSTOPB)
     158             : #define C_CREAD(tty)    _C_FLAG((tty), CREAD)
     159             : #define C_PARENB(tty)   _C_FLAG((tty), PARENB)
     160             : #define C_PARODD(tty)   _C_FLAG((tty), PARODD)
     161             : #define C_HUPCL(tty)    _C_FLAG((tty), HUPCL)
     162             : #define C_CLOCAL(tty)   _C_FLAG((tty), CLOCAL)
     163             : #define C_CIBAUD(tty)   _C_FLAG((tty), CIBAUD)
     164             : #define C_CRTSCTS(tty)  _C_FLAG((tty), CRTSCTS)
     165             : 
     166             : #define L_ISIG(tty)     _L_FLAG((tty), ISIG)
     167             : #define L_ICANON(tty)   _L_FLAG((tty), ICANON)
     168             : #define L_XCASE(tty)    _L_FLAG((tty), XCASE)
     169             : #define L_ECHO(tty)     _L_FLAG((tty), ECHO)
     170             : #define L_ECHOE(tty)    _L_FLAG((tty), ECHOE)
     171             : #define L_ECHOK(tty)    _L_FLAG((tty), ECHOK)
     172             : #define L_ECHONL(tty)   _L_FLAG((tty), ECHONL)
     173             : #define L_NOFLSH(tty)   _L_FLAG((tty), NOFLSH)
     174             : #define L_TOSTOP(tty)   _L_FLAG((tty), TOSTOP)
     175             : #define L_ECHOCTL(tty)  _L_FLAG((tty), ECHOCTL)
     176             : #define L_ECHOPRT(tty)  _L_FLAG((tty), ECHOPRT)
     177             : #define L_ECHOKE(tty)   _L_FLAG((tty), ECHOKE)
     178             : #define L_FLUSHO(tty)   _L_FLAG((tty), FLUSHO)
     179             : #define L_PENDIN(tty)   _L_FLAG((tty), PENDIN)
     180             : #define L_IEXTEN(tty)   _L_FLAG((tty), IEXTEN)
     181             : 
     182             : struct device;
     183             : struct signal_struct;
     184             : 
     185             : /*
     186             :  * Port level information. Each device keeps its own port level information
     187             :  * so provide a common structure for those ports wanting to use common support
     188             :  * routines.
     189             :  *
     190             :  * The tty port has a different lifetime to the tty so must be kept apart.
     191             :  * In addition be careful as tty -> port mappings are valid for the life
     192             :  * of the tty object but in many cases port -> tty mappings are valid only
     193             :  * until a hangup so don't use the wrong path.
     194             :  */
     195             : 
     196             : struct tty_port;
     197             : 
     198             : struct tty_port_operations {
     199             :         /* Return 1 if the carrier is raised */
     200             :         int (*carrier_raised)(struct tty_port *port);
     201             :         /* Control the DTR line */
     202             :         void (*dtr_rts)(struct tty_port *port, int raise);
     203             :         /* Called when the last close completes or a hangup finishes
     204             :            IFF the port was initialized. Do not use to free resources. Called
     205             :            under the port mutex to serialize against activate/shutdowns */
     206             :         void (*shutdown)(struct tty_port *port);
     207             :         void (*drop)(struct tty_port *port);
     208             :         /* Called under the port mutex from tty_port_open, serialized using
     209             :            the port mutex */
     210             :         /* FIXME: long term getting the tty argument *out* of this would be
     211             :            good for consoles */
     212             :         int (*activate)(struct tty_port *port, struct tty_struct *tty);
     213             :         /* Called on the final put of a port */
     214             :         void (*destruct)(struct tty_port *port);
     215             : };
     216           1 :         
     217             : struct tty_port {
     218             :         struct tty_struct       *tty;           /* Back pointer */
     219             :         const struct tty_port_operations *ops;  /* Port operations */
     220             :         spinlock_t              lock;           /* Lock protecting tty field */
     221             :         int                     blocked_open;   /* Waiting to open */
     222             :         int                     count;          /* Usage count */
     223             :         wait_queue_head_t       open_wait;      /* Open waiters */
     224             :         wait_queue_head_t       close_wait;     /* Close waiters */
     225             :         wait_queue_head_t       delta_msr_wait; /* Modem status change */
     226             :         unsigned long           flags;          /* TTY flags ASY_*/
     227             :         struct mutex            mutex;          /* Locking */
     228             :         struct mutex            buf_mutex;      /* Buffer alloc lock */
     229             :         unsigned char           *xmit_buf;      /* Optional buffer */
     230             :         unsigned int            close_delay;    /* Close port delay */
     231             :         unsigned int            closing_wait;   /* Delay for output */
     232             :         int                     drain_delay;    /* Set to zero if no pure time
     233             :                                                    based drain is needed else
     234             :                                                    set to size of fifo */
     235             :         struct kref             kref;           /* Ref counter */
     236             : };
     237           1 : 
     238             : /*
     239             :  * Where all of the state associated with a tty is kept while the tty
     240             :  * is open.  Since the termios state should be kept even if the tty
     241             :  * has been closed --- for things like the baud rate, etc --- it is
     242             :  * not stored here, but rather a pointer to the real state is stored
     243             :  * here.  Possible the winsize structure should have the same
     244             :  * treatment, but (1) the default 80x24 is usually right and (2) it's
     245             :  * most often used by a windowing system, which will set the correct
     246             :  * size each time the window is created or resized anyway.
     247             :  *                                              - TYT, 9/14/92
     248             :  */
     249             : 
     250             : struct tty_operations;
     251             : 
     252             : struct tty_struct {
     253             :         int     magic;
     254             :         struct kref kref;
     255             :         struct tty_driver *driver;
     256             :         const struct tty_operations *ops;
     257             :         int index;
     258             : 
     259             :         /* Protects ldisc changes: Lock tty not pty */
     260             :         struct mutex ldisc_mutex;
     261             :         struct tty_ldisc *ldisc;
     262             : 
     263             :         struct mutex termios_mutex;
     264             :         spinlock_t ctrl_lock;
     265             :         /* Termios values are protected by the termios mutex */
     266             :         struct ktermios *termios, *termios_locked;
     267             :         struct termiox *termiox;        /* May be NULL for unsupported */
     268             :         char name[64];
     269             :         struct pid *pgrp;               /* Protected by ctrl lock */
     270             :         struct pid *session;
     271             :         unsigned long flags;
     272             :         int count;
     273             :         struct winsize winsize;         /* termios mutex */
     274             :         unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
     275             :         unsigned char low_latency:1, warned:1;
     276             :         unsigned char ctrl_status;      /* ctrl_lock */
     277             :         unsigned int receive_room;      /* Bytes free for queue */
     278             : 
     279             :         struct tty_struct *link;
     280             :         struct fasync_struct *fasync;
     281             :         struct tty_bufhead buf;         /* Locked internally */
     282             :         int alt_speed;          /* For magic substitution of 38400 bps */
     283             :         wait_queue_head_t write_wait;
     284             :         wait_queue_head_t read_wait;
     285             :         struct work_struct hangup_work;
     286             :         void *disc_data;
     287             :         void *driver_data;
     288             :         struct list_head tty_files;
     289             : 
     290             : #define N_TTY_BUF_SIZE 4096
     291             : 
     292             :         /*
     293             :          * The following is data for the N_TTY line discipline.  For
     294             :          * historical reasons, this is included in the tty structure.
     295             :          * Mostly locked by the BKL.
     296             :          */
     297             :         unsigned int column;
     298             :         unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
     299             :         unsigned char closing:1;
     300             :         unsigned char echo_overrun:1;
     301             :         unsigned short minimum_to_wake;
     302             :         unsigned long overrun_time;
     303             :         int num_overrun;
     304             :         unsigned long process_char_map[256/(8*sizeof(unsigned long))];
     305             :         char *read_buf;
     306             :         int read_head;
     307             :         int read_tail;
     308             :         int read_cnt;
     309             :         unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
     310             :         unsigned char *echo_buf;
     311             :         unsigned int echo_pos;
     312             :         unsigned int echo_cnt;
     313             :         int canon_data;
     314             :         unsigned long canon_head;
     315             :         unsigned int canon_column;
     316             :         struct mutex atomic_read_lock;
     317             :         struct mutex atomic_write_lock;
     318             :         struct mutex output_lock;
     319             :         struct mutex echo_lock;
     320             :         unsigned char *write_buf;
     321             :         int write_cnt;
     322             :         spinlock_t read_lock;
     323             :         /* If the tty has a pending do_SAK, queue it here - akpm */
     324             :         struct work_struct SAK_work;
     325             :         struct tty_port *port;
     326             : };
     327             : 
     328             : /* tty magic number */
     329             : #define TTY_MAGIC               0x5401
     330             : 
     331             : /*
     332             :  * These bits are used in the flags field of the tty structure.
     333             :  *
     334             :  * So that interrupts won't be able to mess up the queues,
     335             :  * copy_to_cooked must be atomic with respect to itself, as must
     336             :  * tty->write.  Thus, you must use the inline functions set_bit() and
     337             :  * clear_bit() to make things atomic.
     338             :  */
     339             : #define TTY_THROTTLED           0       /* Call unthrottle() at threshold min */
     340             : #define TTY_IO_ERROR            1       /* Cause an I/O error (may be no ldisc too) */
     341             : #define TTY_OTHER_CLOSED        2       /* Other side (if any) has closed */
     342             : #define TTY_EXCLUSIVE           3       /* Exclusive open mode */
     343             : #define TTY_DEBUG               4       /* Debugging */
     344             : #define TTY_DO_WRITE_WAKEUP     5       /* Call write_wakeup after queuing new */
     345             : #define TTY_PUSH                6       /* n_tty private */
     346             : #define TTY_CLOSING             7       /* ->close() in progress */
     347             : #define TTY_LDISC               9       /* Line discipline attached */
     348             : #define TTY_LDISC_CHANGING      10      /* Line discipline changing */
     349             : #define TTY_LDISC_OPEN          11      /* Line discipline is open */
     350             : #define TTY_HW_COOK_OUT         14      /* Hardware can do output cooking */
     351             : #define TTY_HW_COOK_IN          15      /* Hardware can do input cooking */
     352             : #define TTY_PTY_LOCK            16      /* pty private */
     353             : #define TTY_NO_WRITE_SPLIT      17      /* Preserve write boundaries to driver */
     354             : #define TTY_HUPPED              18      /* Post driver->hangup() */
     355             : #define TTY_FLUSHING            19      /* Flushing to ldisc in progress */
     356             : #define TTY_FLUSHPENDING        20      /* Queued buffer flush pending */
     357             : 
     358             : #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
     359             : 
     360             : extern void tty_write_flush(struct tty_struct *);
     361             : 
     362             : extern struct ktermios tty_std_termios;
     363             : 
     364             : extern void console_init(void);
     365             : extern int vcs_init(void);
     366             : 
     367             : extern struct class *tty_class;
     368             : 
     369             : /**
     370             :  *      tty_kref_get            -       get a tty reference
     371             :  *      @tty: tty device
     372             :  *
     373             :  *      Return a new reference to a tty object. The caller must hold
     374             :  *      sufficient locks/counts to ensure that their existing reference cannot
     375             :  *      go away
     376             :  */
     377             : 
     378             : static inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
     379             : {
     380             :         if (tty)
     381             :                 kref_get(&tty->kref);
     382             :         return tty;
     383             : }
     384             : extern void tty_kref_put(struct tty_struct *tty);
     385             : 
     386             : extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
     387             :                               const char *routine);
     388             : extern char *tty_name(struct tty_struct *tty, char *buf);
     389             : extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
     390             : extern int tty_check_change(struct tty_struct *tty);
     391             : extern void stop_tty(struct tty_struct *tty);
     392             : extern void start_tty(struct tty_struct *tty);
     393             : extern int tty_register_driver(struct tty_driver *driver);
     394             : extern int tty_unregister_driver(struct tty_driver *driver);
     395             : extern struct device *tty_register_device(struct tty_driver *driver,
     396             :                                           unsigned index, struct device *dev);
     397             : extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
     398             : extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
     399             :                              int buflen);
     400             : extern void tty_write_message(struct tty_struct *tty, char *msg);
     401             : extern int tty_put_char(struct tty_struct *tty, unsigned char c);
     402             : extern int tty_chars_in_buffer(struct tty_struct *tty);
     403             : extern int tty_write_room(struct tty_struct *tty);
     404             : extern void tty_driver_flush_buffer(struct tty_struct *tty);
     405             : extern void tty_throttle(struct tty_struct *tty);
     406             : extern void tty_unthrottle(struct tty_struct *tty);
     407             : extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
     408             : extern void tty_shutdown(struct tty_struct *tty);
     409             : extern void tty_free_termios(struct tty_struct *tty);
     410             : extern int is_current_pgrp_orphaned(void);
     411             : extern struct pid *tty_get_pgrp(struct tty_struct *tty);
     412             : extern int is_ignored(int sig);
     413             : extern int tty_signal(int sig, struct tty_struct *tty);
     414             : extern void tty_hangup(struct tty_struct *tty);
     415             : extern void tty_vhangup(struct tty_struct *tty);
     416             : extern void tty_vhangup_self(void);
     417             : extern void tty_unhangup(struct file *filp);
     418             : extern int tty_hung_up_p(struct file *filp);
     419             : extern void do_SAK(struct tty_struct *tty);
     420             : extern void __do_SAK(struct tty_struct *tty);
     421             : extern void disassociate_ctty(int priv);
     422             : extern void no_tty(void);
     423             : extern void tty_flip_buffer_push(struct tty_struct *tty);
     424             : extern void tty_flush_to_ldisc(struct tty_struct *tty);
     425             : extern void tty_buffer_free_all(struct tty_struct *tty);
     426             : extern void tty_buffer_flush(struct tty_struct *tty);
     427             : extern void tty_buffer_init(struct tty_struct *tty);
     428             : extern speed_t tty_get_baud_rate(struct tty_struct *tty);
     429             : extern speed_t tty_termios_baud_rate(struct ktermios *termios);
     430             : extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
     431             : extern void tty_termios_encode_baud_rate(struct ktermios *termios,
     432             :                                                 speed_t ibaud, speed_t obaud);
     433             : extern void tty_encode_baud_rate(struct tty_struct *tty,
     434             :                                                 speed_t ibaud, speed_t obaud);
     435             : extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
     436             : extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
     437             : 
     438             : extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
     439             : extern void tty_ldisc_deref(struct tty_ldisc *);
     440             : extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
     441             : extern void tty_ldisc_hangup(struct tty_struct *tty);
     442             : extern const struct file_operations tty_ldiscs_proc_fops;
     443             : 
     444             : extern void tty_wakeup(struct tty_struct *tty);
     445             : extern void tty_ldisc_flush(struct tty_struct *tty);
     446             : 
     447             : extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
     448             : extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
     449             :                         unsigned int cmd, unsigned long arg);
     450             : extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
     451             : extern dev_t tty_devnum(struct tty_struct *tty);
     452             : extern void proc_clear_tty(struct task_struct *p);
     453             : extern struct tty_struct *get_current_tty(void);
     454             : extern void tty_default_fops(struct file_operations *fops);
     455             : extern struct tty_struct *alloc_tty_struct(void);
     456             : extern void free_tty_struct(struct tty_struct *tty);
     457             : extern void initialize_tty_struct(struct tty_struct *tty,
     458             :                 struct tty_driver *driver, int idx);
     459             : extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
     460             :                                                                 int first_ok);
     461             : extern int tty_release(struct inode *inode, struct file *filp);
     462             : extern int tty_init_termios(struct tty_struct *tty);
     463             : 
     464             : extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty);
     465             : extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty);
     466             : 
     467             : extern struct mutex tty_mutex;
     468             : 
     469             : extern void tty_write_unlock(struct tty_struct *tty);
     470             : extern int tty_write_lock(struct tty_struct *tty, int ndelay);
     471             : #define tty_is_writelocked(tty)  (mutex_is_locked(&tty->atomic_write_lock))
     472             : 
     473             : extern void tty_port_init(struct tty_port *port);
     474             : extern int tty_port_alloc_xmit_buf(struct tty_port *port);
     475             : extern void tty_port_free_xmit_buf(struct tty_port *port);
     476             : extern void tty_port_put(struct tty_port *port);
     477             : 
     478             : static inline struct tty_port *tty_port_get(struct tty_port *port)
     479             : {
     480             :         if (port)
     481             :                 kref_get(&port->kref);
     482             :         return port;
     483             : }
     484             : 
     485             : extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
     486             : extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
     487             : extern int tty_port_carrier_raised(struct tty_port *port);
     488             : extern void tty_port_raise_dtr_rts(struct tty_port *port);
     489             : extern void tty_port_lower_dtr_rts(struct tty_port *port);
     490             : extern void tty_port_hangup(struct tty_port *port);
     491             : extern int tty_port_block_til_ready(struct tty_port *port,
     492             :                                 struct tty_struct *tty, struct file *filp);
     493             : extern int tty_port_close_start(struct tty_port *port,
     494             :                                 struct tty_struct *tty, struct file *filp);
     495             : extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
     496             : extern void tty_port_close(struct tty_port *port,
     497             :                                 struct tty_struct *tty, struct file *filp);
     498             : extern int tty_port_open(struct tty_port *port,
     499             :                                 struct tty_struct *tty, struct file *filp);
     500             : static inline int tty_port_users(struct tty_port *port)
     501             : {
     502             :         return port->count + port->blocked_open;
     503             : }
     504             : 
     505             : extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
     506             : extern int tty_unregister_ldisc(int disc);
     507             : extern int tty_set_ldisc(struct tty_struct *tty, int ldisc);
     508             : extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
     509             : extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty);
     510             : extern void tty_ldisc_init(struct tty_struct *tty);
     511             : extern void tty_ldisc_begin(void);
     512             : /* This last one is just for the tty layer internals and shouldn't be used elsewhere */
     513             : extern void tty_ldisc_enable(struct tty_struct *tty);
     514             : 
     515             : 
     516             : /* n_tty.c */
     517             : extern struct tty_ldisc_ops tty_ldisc_N_TTY;
     518             : 
     519             : /* tty_audit.c */
     520             : #ifdef CONFIG_AUDIT
     521             : extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
     522             :                                size_t size);
     523             : extern void tty_audit_exit(void);
     524             : extern void tty_audit_fork(struct signal_struct *sig);
     525             : extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
     526             : extern void tty_audit_push(struct tty_struct *tty);
     527             : extern void tty_audit_push_task(struct task_struct *tsk,
     528             :                                         uid_t loginuid, u32 sessionid);
     529             : #else
     530             : static inline void tty_audit_add_data(struct tty_struct *tty,
     531             :                                       unsigned char *data, size_t size)
     532             : {
     533             : }
     534             : static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
     535             : {
     536             : }
     537             : static inline void tty_audit_exit(void)
     538             : {
     539             : }
     540             : static inline void tty_audit_fork(struct signal_struct *sig)
     541             : {
     542             : }
     543             : static inline void tty_audit_push(struct tty_struct *tty)
     544             : {
     545             : }
     546             : static inline void tty_audit_push_task(struct task_struct *tsk,
     547             :                                         uid_t loginuid, u32 sessionid)
     548             : {
     549             : }
     550             : #endif
     551             : 
     552             : /* tty_ioctl.c */
     553             : extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
     554             :                        unsigned int cmd, unsigned long arg);
     555             : 
     556             : /* serial.c */
     557             : 
     558             : extern void serial_console_init(void);
     559             : 
     560             : /* pcxx.c */
     561             : 
     562             : extern int pcxe_open(struct tty_struct *tty, struct file *filp);
     563             : 
     564             : /* vt.c */
     565             : 
     566             : extern int vt_ioctl(struct tty_struct *tty, struct file *file,
     567             :                     unsigned int cmd, unsigned long arg);
     568             : 
     569             : extern long vt_compat_ioctl(struct tty_struct *tty, struct file * file,
     570             :                      unsigned int cmd, unsigned long arg);
     571             : 
     572             : #endif /* __KERNEL__ */
     573             : #endif

Generated by: LCOV version 1.10