Lines Matching refs:tty
36 # define tty_debug_hangup(tty, f, args...) tty_debug(tty, f, ##args) argument
38 # define tty_debug_hangup(tty, f, args...) do {} while (0) argument
47 static void pty_close(struct tty_struct *tty, struct file *filp) in pty_close() argument
49 if (tty->driver->subtype == PTY_TYPE_MASTER) in pty_close()
50 WARN_ON(tty->count > 1); in pty_close()
52 if (tty_io_error(tty)) in pty_close()
54 if (tty->count > 2) in pty_close()
57 set_bit(TTY_IO_ERROR, &tty->flags); in pty_close()
58 wake_up_interruptible(&tty->read_wait); in pty_close()
59 wake_up_interruptible(&tty->write_wait); in pty_close()
60 spin_lock_irq(&tty->ctrl.lock); in pty_close()
61 tty->ctrl.packet = false; in pty_close()
62 spin_unlock_irq(&tty->ctrl.lock); in pty_close()
64 if (!tty->link) in pty_close()
66 set_bit(TTY_OTHER_CLOSED, &tty->link->flags); in pty_close()
67 wake_up_interruptible(&tty->link->read_wait); in pty_close()
68 wake_up_interruptible(&tty->link->write_wait); in pty_close()
69 if (tty->driver->subtype == PTY_TYPE_MASTER) { in pty_close()
70 set_bit(TTY_OTHER_CLOSED, &tty->flags); in pty_close()
72 if (tty->driver == ptm_driver) { in pty_close()
74 if (tty->link->driver_data) in pty_close()
75 devpts_pty_kill(tty->link->driver_data); in pty_close()
79 tty_vhangup(tty->link); in pty_close()
93 static void pty_unthrottle(struct tty_struct *tty) in pty_unthrottle() argument
95 tty_wakeup(tty->link); in pty_unthrottle()
96 set_bit(TTY_THROTTLED, &tty->flags); in pty_unthrottle()
111 static ssize_t pty_write(struct tty_struct *tty, const u8 *buf, size_t c) in pty_write() argument
113 struct tty_struct *to = tty->link; in pty_write()
115 if (tty->flow.stopped || !c) in pty_write()
129 static unsigned int pty_write_room(struct tty_struct *tty) in pty_write_room() argument
131 if (tty->flow.stopped) in pty_write_room()
133 return tty_buffer_space_avail(tty->link->port); in pty_write_room()
137 static int pty_set_lock(struct tty_struct *tty, int __user *arg) in pty_set_lock() argument
144 set_bit(TTY_PTY_LOCK, &tty->flags); in pty_set_lock()
146 clear_bit(TTY_PTY_LOCK, &tty->flags); in pty_set_lock()
150 static int pty_get_lock(struct tty_struct *tty, int __user *arg) in pty_get_lock() argument
152 int locked = test_bit(TTY_PTY_LOCK, &tty->flags); in pty_get_lock()
158 static int pty_set_pktmode(struct tty_struct *tty, int __user *arg) in pty_set_pktmode() argument
165 spin_lock_irq(&tty->ctrl.lock); in pty_set_pktmode()
167 if (!tty->ctrl.packet) { in pty_set_pktmode()
168 tty->link->ctrl.pktstatus = 0; in pty_set_pktmode()
170 tty->ctrl.packet = true; in pty_set_pktmode()
173 tty->ctrl.packet = false; in pty_set_pktmode()
174 spin_unlock_irq(&tty->ctrl.lock); in pty_set_pktmode()
180 static int pty_get_pktmode(struct tty_struct *tty, int __user *arg) in pty_get_pktmode() argument
182 int pktmode = tty->ctrl.packet; in pty_get_pktmode()
188 static int pty_signal(struct tty_struct *tty, int sig) in pty_signal() argument
195 if (tty->link) { in pty_signal()
196 pgrp = tty_get_pgrp(tty->link); in pty_signal()
204 static void pty_flush_buffer(struct tty_struct *tty) in pty_flush_buffer() argument
206 struct tty_struct *to = tty->link; in pty_flush_buffer()
213 spin_lock_irq(&tty->ctrl.lock); in pty_flush_buffer()
214 tty->ctrl.pktstatus |= TIOCPKT_FLUSHWRITE; in pty_flush_buffer()
216 spin_unlock_irq(&tty->ctrl.lock); in pty_flush_buffer()
220 static int pty_open(struct tty_struct *tty, struct file *filp) in pty_open() argument
222 if (!tty || !tty->link) in pty_open()
225 if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) in pty_open()
227 if (test_bit(TTY_PTY_LOCK, &tty->link->flags)) in pty_open()
229 if (tty->driver->subtype == PTY_TYPE_SLAVE && tty->link->count != 1) in pty_open()
232 clear_bit(TTY_IO_ERROR, &tty->flags); in pty_open()
233 clear_bit(TTY_OTHER_CLOSED, &tty->link->flags); in pty_open()
234 set_bit(TTY_THROTTLED, &tty->flags); in pty_open()
238 set_bit(TTY_IO_ERROR, &tty->flags); in pty_open()
242 static void pty_set_termios(struct tty_struct *tty, in pty_set_termios() argument
246 if (tty->link && tty->link->ctrl.packet) { in pty_set_termios()
247 int extproc = (old_termios->c_lflag & EXTPROC) | L_EXTPROC(tty); in pty_set_termios()
251 int new_flow = (I_IXON(tty) && in pty_set_termios()
252 STOP_CHAR(tty) == '\023' && in pty_set_termios()
253 START_CHAR(tty) == '\021'); in pty_set_termios()
255 spin_lock_irq(&tty->ctrl.lock); in pty_set_termios()
257 tty->ctrl.pktstatus &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP); in pty_set_termios()
259 tty->ctrl.pktstatus |= TIOCPKT_DOSTOP; in pty_set_termios()
261 tty->ctrl.pktstatus |= TIOCPKT_NOSTOP; in pty_set_termios()
264 tty->ctrl.pktstatus |= TIOCPKT_IOCTL; in pty_set_termios()
265 spin_unlock_irq(&tty->ctrl.lock); in pty_set_termios()
266 wake_up_interruptible(&tty->link->read_wait); in pty_set_termios()
270 tty->termios.c_cflag &= ~(CSIZE | PARENB); in pty_set_termios()
271 tty->termios.c_cflag |= (CS8 | CREAD); in pty_set_termios()
283 static int pty_resize(struct tty_struct *tty, struct winsize *ws) in pty_resize() argument
286 struct tty_struct *pty = tty->link; in pty_resize()
289 mutex_lock(&tty->winsize_mutex); in pty_resize()
290 if (!memcmp(ws, &tty->winsize, sizeof(*ws))) in pty_resize()
294 pgrp = tty_get_pgrp(tty); in pty_resize()
305 tty->winsize = *ws; in pty_resize()
308 mutex_unlock(&tty->winsize_mutex); in pty_resize()
322 static void pty_start(struct tty_struct *tty) in pty_start() argument
326 if (tty->link && tty->link->ctrl.packet) { in pty_start()
327 spin_lock_irqsave(&tty->ctrl.lock, flags); in pty_start()
328 tty->ctrl.pktstatus &= ~TIOCPKT_STOP; in pty_start()
329 tty->ctrl.pktstatus |= TIOCPKT_START; in pty_start()
330 spin_unlock_irqrestore(&tty->ctrl.lock, flags); in pty_start()
331 wake_up_interruptible_poll(&tty->link->read_wait, EPOLLIN); in pty_start()
335 static void pty_stop(struct tty_struct *tty) in pty_stop() argument
339 if (tty->link && tty->link->ctrl.packet) { in pty_stop()
340 spin_lock_irqsave(&tty->ctrl.lock, flags); in pty_stop()
341 tty->ctrl.pktstatus &= ~TIOCPKT_START; in pty_stop()
342 tty->ctrl.pktstatus |= TIOCPKT_STOP; in pty_stop()
343 spin_unlock_irqrestore(&tty->ctrl.lock, flags); in pty_stop()
344 wake_up_interruptible_poll(&tty->link->read_wait, EPOLLIN); in pty_stop()
359 static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, in pty_common_install() argument
364 int idx = tty->index; in pty_common_install()
389 tty_init_termios(tty); in pty_common_install()
393 driver->ttys[idx] = tty; in pty_common_install()
395 memset(&tty->termios_locked, 0, sizeof(tty->termios_locked)); in pty_common_install()
396 tty->termios = driver->init_termios; in pty_common_install()
397 memset(&o_tty->termios_locked, 0, sizeof(tty->termios_locked)); in pty_common_install()
406 tty->link = o_tty; in pty_common_install()
407 o_tty->link = tty; in pty_common_install()
413 tty->port = ports[1]; in pty_common_install()
419 tty->count++; in pty_common_install()
431 static void pty_cleanup(struct tty_struct *tty) in pty_cleanup() argument
433 tty_port_put(tty->port); in pty_cleanup()
439 static int pty_install(struct tty_driver *driver, struct tty_struct *tty) in pty_install() argument
441 return pty_common_install(driver, tty, true); in pty_install()
444 static void pty_remove(struct tty_driver *driver, struct tty_struct *tty) in pty_remove() argument
446 struct tty_struct *pair = tty->link; in pty_remove()
448 driver->ttys[tty->index] = NULL; in pty_remove()
453 static int pty_bsd_ioctl(struct tty_struct *tty, in pty_bsd_ioctl() argument
458 return pty_set_lock(tty, (int __user *) arg); in pty_bsd_ioctl()
460 return pty_get_lock(tty, (int __user *)arg); in pty_bsd_ioctl()
462 return pty_set_pktmode(tty, (int __user *)arg); in pty_bsd_ioctl()
464 return pty_get_pktmode(tty, (int __user *)arg); in pty_bsd_ioctl()
466 return pty_signal(tty, (int) arg); in pty_bsd_ioctl()
474 static long pty_bsd_compat_ioctl(struct tty_struct *tty, in pty_bsd_compat_ioctl() argument
481 return pty_bsd_ioctl(tty, cmd, (unsigned long)compat_ptr(arg)); in pty_bsd_compat_ioctl()
602 int ptm_open_peer(struct file *master, struct tty_struct *tty, int flags) in ptm_open_peer() argument
609 if (tty->driver != ptm_driver) in ptm_open_peer()
619 path.mnt = devpts_mntget(master, tty->driver_data); in ptm_open_peer()
624 path.dentry = tty->link->driver_data; in ptm_open_peer()
642 static int pty_unix98_ioctl(struct tty_struct *tty, in pty_unix98_ioctl() argument
647 return pty_set_lock(tty, (int __user *)arg); in pty_unix98_ioctl()
649 return pty_get_lock(tty, (int __user *)arg); in pty_unix98_ioctl()
651 return pty_set_pktmode(tty, (int __user *)arg); in pty_unix98_ioctl()
653 return pty_get_pktmode(tty, (int __user *)arg); in pty_unix98_ioctl()
655 return put_user(tty->index, (unsigned int __user *)arg); in pty_unix98_ioctl()
657 return pty_signal(tty, (int) arg); in pty_unix98_ioctl()
664 static long pty_unix98_compat_ioctl(struct tty_struct *tty, in pty_unix98_compat_ioctl() argument
671 return pty_unix98_ioctl(tty, cmd, in pty_unix98_compat_ioctl()
708 struct tty_struct *tty; in pts_unix98_lookup() local
711 tty = devpts_get_priv(file->f_path.dentry); in pts_unix98_lookup()
714 if (!tty) in pts_unix98_lookup()
716 return tty; in pts_unix98_lookup()
719 static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty) in pty_unix98_install() argument
721 return pty_common_install(driver, tty, false); in pty_unix98_install()
725 static void pty_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) in pty_unix98_remove() argument
729 if (tty->driver->subtype == PTY_TYPE_MASTER) in pty_unix98_remove()
730 fsi = tty->driver_data; in pty_unix98_remove()
732 fsi = tty->link->driver_data; in pty_unix98_remove()
735 devpts_kill_index(fsi, tty->index); in pty_unix98_remove()
740 static void pty_show_fdinfo(struct tty_struct *tty, struct seq_file *m) in pty_show_fdinfo() argument
742 seq_printf(m, "tty-index:\t%d\n", tty->index); in pty_show_fdinfo()
793 struct tty_struct *tty; in ptmx_open() local
824 tty = tty_init_dev(ptm_driver, index); in ptmx_open()
829 retval = PTR_ERR(tty); in ptmx_open()
830 if (IS_ERR(tty)) in ptmx_open()
837 set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */ in ptmx_open()
838 tty->driver_data = fsi; in ptmx_open()
840 tty_add_file(tty, filp); in ptmx_open()
842 dentry = devpts_pty_new(fsi, index, tty->link); in ptmx_open()
847 tty->link->driver_data = dentry; in ptmx_open()
849 retval = ptm_driver->ops->open(tty, filp); in ptmx_open()
853 tty_debug_hangup(tty, "opening (count=%d)\n", tty->count); in ptmx_open()
855 tty_unlock(tty); in ptmx_open()
858 tty_unlock(tty); in ptmx_open()