diff options
Diffstat (limited to 'include/linux/tty.h')
| -rw-r--r-- | include/linux/tty.h | 103 |
1 files changed, 2 insertions, 101 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index 95fc2f100f12..e5d6b1f28823 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -17,30 +17,6 @@ /* - * Lock subclasses for tty locks - * - * TTY_LOCK_NORMAL is for normal ttys and master ptys. - * TTY_LOCK_SLAVE is for slave ptys only. - * - * Lock subclasses are necessary for handling nested locking with pty pairs. - * tty locks which use nested locking: - * - * legacy_mutex - Nested tty locks are necessary for releasing pty pairs. - * The stable lock order is master pty first, then slave pty. - * termios_rwsem - The stable lock order is tty_buffer lock->termios_rwsem. - * Subclassing this lock enables the slave pty to hold its - * termios_rwsem when claiming the master tty_buffer lock. - * tty_buffer lock - slave ptys can claim nested buffer lock when handling - * signal chars. The stable lock order is slave pty, then - * master. - */ - -enum { - TTY_LOCK_NORMAL = 0, - TTY_LOCK_SLAVE, -}; - -/* * (Note: the *_driver.minor_start values 1, 64, 128, 192 are * hardcoded at present.) */ @@ -284,7 +260,7 @@ struct tty_operations; struct tty_struct { int magic; struct kref kref; - struct device *dev; + struct device *dev; /* class device or NULL (e.g. ptys, serdev) */ struct tty_driver *driver; const struct tty_operations *ops; int index; @@ -373,21 +349,6 @@ struct tty_file_private { #define TTY_LDISC_CHANGING 20 /* Change pending - non-block IO */ #define TTY_LDISC_HALTED 22 /* Line discipline is halted */ -/* Values for tty->flow_change */ -#define TTY_THROTTLE_SAFE 1 -#define TTY_UNTHROTTLE_SAFE 2 - -static inline void __tty_set_flow_change(struct tty_struct *tty, int val) -{ - tty->flow_change = val; -} - -static inline void tty_set_flow_change(struct tty_struct *tty, int val) -{ - tty->flow_change = val; - smp_mb(); -} - static inline bool tty_io_nonblock(struct tty_struct *tty, struct file *file) { return file->f_flags & O_NONBLOCK || @@ -419,10 +380,6 @@ extern struct tty_struct *tty_kopen_exclusive(dev_t device); extern struct tty_struct *tty_kopen_shared(dev_t device); extern void tty_kclose(struct tty_struct *tty); extern int tty_dev_name_to_number(const char *name, dev_t *number); -extern int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout); -extern void tty_ldisc_unlock(struct tty_struct *tty); -extern ssize_t redirected_tty_write(struct kiocb *, struct iov_iter *); -extern struct file *tty_release_redirect(struct tty_struct *tty); #else static inline void tty_kref_put(struct tty_struct *tty) { } @@ -475,14 +432,10 @@ static inline struct tty_struct *tty_kref_get(struct tty_struct *tty) extern const char *tty_driver_name(const struct tty_struct *tty); extern void tty_wait_until_sent(struct tty_struct *tty, long timeout); -extern int __tty_check_change(struct tty_struct *tty, int sig); -extern int tty_check_change(struct tty_struct *tty); -extern void __stop_tty(struct tty_struct *tty); extern void stop_tty(struct tty_struct *tty); -extern void __start_tty(struct tty_struct *tty); extern void start_tty(struct tty_struct *tty); extern int tty_register_driver(struct tty_driver *driver); -extern int tty_unregister_driver(struct tty_driver *driver); +extern void tty_unregister_driver(struct tty_driver *driver); extern struct device *tty_register_device(struct tty_driver *driver, unsigned index, struct device *dev); extern struct device *tty_register_device_attr(struct tty_driver *driver, @@ -506,23 +459,11 @@ extern int tty_get_icount(struct tty_struct *tty, extern int is_current_pgrp_orphaned(void); extern void tty_hangup(struct tty_struct *tty); extern void tty_vhangup(struct tty_struct *tty); -extern void tty_vhangup_session(struct tty_struct *tty); extern int tty_hung_up_p(struct file *filp); extern void do_SAK(struct tty_struct *tty); extern void __do_SAK(struct tty_struct *tty); -extern void tty_open_proc_set_tty(struct file *filp, struct tty_struct *tty); -extern int tty_signal_session_leader(struct tty_struct *tty, int exit_session); -extern void session_clear_tty(struct pid *session); extern void no_tty(void); -extern void tty_buffer_free_all(struct tty_port *port); -extern void tty_buffer_flush(struct tty_struct *tty, struct tty_ldisc *ld); -extern void tty_buffer_init(struct tty_port *port); -extern void tty_buffer_set_lock_subclass(struct tty_port *port); -extern bool tty_buffer_restart_work(struct tty_port *port); -extern bool tty_buffer_cancel_work(struct tty_port *port); -extern void tty_buffer_flush_work(struct tty_port *port); extern speed_t tty_termios_baud_rate(struct ktermios *termios); -extern speed_t tty_termios_input_baud_rate(struct ktermios *termios); extern void tty_termios_encode_baud_rate(struct ktermios *termios, speed_t ibaud, speed_t obaud); extern void tty_encode_baud_rate(struct tty_struct *tty, @@ -550,27 +491,16 @@ extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt); extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *); extern void tty_ldisc_deref(struct tty_ldisc *); extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *); -extern void tty_ldisc_hangup(struct tty_struct *tty, bool reset); -extern int tty_ldisc_reinit(struct tty_struct *tty, int disc); extern const struct seq_operations tty_ldiscs_seq_ops; extern void tty_wakeup(struct tty_struct *tty); extern void tty_ldisc_flush(struct tty_struct *tty); -extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg); extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); -extern long tty_jobctrl_ioctl(struct tty_struct *tty, struct tty_struct *real_tty, - struct file *file, unsigned int cmd, unsigned long arg); extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg); -extern void tty_default_fops(struct file_operations *fops); -extern struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx); -extern int tty_alloc_file(struct file *file); -extern void tty_add_file(struct tty_struct *tty, struct file *file); -extern void tty_free_file(struct file *file); extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx); extern void tty_release_struct(struct tty_struct *tty, int idx); -extern int tty_release(struct inode *inode, struct file *filp); extern void tty_init_termios(struct tty_struct *tty); extern void tty_save_termios(struct tty_struct *tty); extern int tty_standard_install(struct tty_driver *driver, @@ -578,8 +508,6 @@ extern int tty_standard_install(struct tty_driver *driver, extern struct mutex tty_mutex; -#define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock)) - extern void tty_port_init(struct tty_port *port); extern void tty_port_link_device(struct tty_port *port, struct tty_driver *driver, unsigned index); @@ -699,13 +627,8 @@ static inline int tty_port_users(struct tty_port *port) extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc); extern int tty_unregister_ldisc(int disc); extern int tty_set_ldisc(struct tty_struct *tty, int disc); -extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty); -extern void tty_ldisc_release(struct tty_struct *tty); -extern int __must_check tty_ldisc_init(struct tty_struct *tty); -extern void tty_ldisc_deinit(struct tty_struct *tty); extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p, char *f, int count); -extern void tty_sysctl_init(void); /* n_tty.c */ extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops); @@ -717,20 +640,10 @@ static inline void n_tty_init(void) { } /* tty_audit.c */ #ifdef CONFIG_AUDIT -extern void tty_audit_add_data(struct tty_struct *tty, const void *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 int tty_audit_push(void); #else -static inline void tty_audit_add_data(struct tty_struct *tty, const void *data, - size_t size) -{ -} -static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch) -{ -} static inline void tty_audit_exit(void) { } @@ -772,16 +685,4 @@ static inline void proc_tty_register_driver(struct tty_driver *d) {} static inline void proc_tty_unregister_driver(struct tty_driver *d) {} #endif -#define tty_msg(fn, tty, f, ...) \ - fn("%s %s: " f, tty_driver_name(tty), tty_name(tty), ##__VA_ARGS__) - -#define tty_debug(tty, f, ...) tty_msg(pr_debug, tty, f, ##__VA_ARGS__) -#define tty_info(tty, f, ...) tty_msg(pr_info, tty, f, ##__VA_ARGS__) -#define tty_notice(tty, f, ...) tty_msg(pr_notice, tty, f, ##__VA_ARGS__) -#define tty_warn(tty, f, ...) tty_msg(pr_warn, tty, f, ##__VA_ARGS__) -#define tty_err(tty, f, ...) tty_msg(pr_err, tty, f, ##__VA_ARGS__) - -#define tty_info_ratelimited(tty, f, ...) \ - tty_msg(pr_info_ratelimited, tty, f, ##__VA_ARGS__) - #endif |