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isicom: redo locking to use tty port locks
[linux-2.6-block.git] / include / linux / tty.h
CommitLineData
1da177e4
LT		 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
1da177e4 8#ifdef __KERNEL__
1da177e4
LT		 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>
70522e12 15#include <linux/mutex.h>
1da177e4
LT		 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 */
1da177e4
LT		 24#define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
25#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
348eb12e 26#define NR_LDISCS 19
4564f9e5
TS		 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 */
44d1b980 39#define N_PROFIBUS_FDL 10 /* Reserved for Profibus */
4564f9e5
TS		 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 */
cd05acfe 47#define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */
348eb12e 48#define N_PPS 18 /* Pulse per Second */
1da177e4 49
1da177e4
LT		 50/*
51 * This character is the same as _POSIX_VDISABLE: it cannot be used as
52 * a c_cc[] character, but indicates that a particular special character
53 * isn't in use (eg VINTR has no character etc)
54 */
55#define __DISABLED_CHAR '\0'
56
33f0f88f
AC		 57struct tty_buffer {
58 struct tty_buffer *next;
59 char *char_buf_ptr;
60 unsigned char *flag_buf_ptr;
61 int used;
62 int size;
8977d929
PF		 63 int commit;
64 int read;
33f0f88f
AC		 65 /* Data points here */
66 unsigned long data[0];
67};
68
69struct tty_bufhead {
52bad64d 70 struct delayed_work work;
808249ce 71 spinlock_t lock;
33f0f88f
AC		 72 struct tty_buffer *head; /* Queue head */
73 struct tty_buffer *tail; /* Active buffer */
74 struct tty_buffer *free; /* Free queue head */
7a4d29f4
AC		 75 int memory_used; /* Buffer space used excluding
76 free queue */
1da177e4 77};
1da177e4
LT		 78/*
79 * When a break, frame error, or parity error happens, these codes are
80 * stuffed into the flags buffer.
81 */
82#define TTY_NORMAL 0
83#define TTY_BREAK 1
84#define TTY_FRAME 2
85#define TTY_PARITY 3
86#define TTY_OVERRUN 4
87
88#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
89#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
90#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
91#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
92#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
93#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
94#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
95#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
96#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
97#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
98#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
99#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
100#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
101#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
102#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
103#define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
104#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
105
7a4d29f4
AC		 106#define _I_FLAG(tty, f) ((tty)->termios->c_iflag & (f))
107#define _O_FLAG(tty, f) ((tty)->termios->c_oflag & (f))
108#define _C_FLAG(tty, f) ((tty)->termios->c_cflag & (f))
109#define _L_FLAG(tty, f) ((tty)->termios->c_lflag & (f))
110
111#define I_IGNBRK(tty) _I_FLAG((tty), IGNBRK)
112#define I_BRKINT(tty) _I_FLAG((tty), BRKINT)
113#define I_IGNPAR(tty) _I_FLAG((tty), IGNPAR)
114#define I_PARMRK(tty) _I_FLAG((tty), PARMRK)
115#define I_INPCK(tty) _I_FLAG((tty), INPCK)
116#define I_ISTRIP(tty) _I_FLAG((tty), ISTRIP)
117#define I_INLCR(tty) _I_FLAG((tty), INLCR)
118#define I_IGNCR(tty) _I_FLAG((tty), IGNCR)
119#define I_ICRNL(tty) _I_FLAG((tty), ICRNL)
120#define I_IUCLC(tty) _I_FLAG((tty), IUCLC)
121#define I_IXON(tty) _I_FLAG((tty), IXON)
122#define I_IXANY(tty) _I_FLAG((tty), IXANY)
123#define I_IXOFF(tty) _I_FLAG((tty), IXOFF)
124#define I_IMAXBEL(tty) _I_FLAG((tty), IMAXBEL)
125#define I_IUTF8(tty) _I_FLAG((tty), IUTF8)
126
127#define O_OPOST(tty) _O_FLAG((tty), OPOST)
128#define O_OLCUC(tty) _O_FLAG((tty), OLCUC)
129#define O_ONLCR(tty) _O_FLAG((tty), ONLCR)
130#define O_OCRNL(tty) _O_FLAG((tty), OCRNL)
131#define O_ONOCR(tty) _O_FLAG((tty), ONOCR)
132#define O_ONLRET(tty) _O_FLAG((tty), ONLRET)
133#define O_OFILL(tty) _O_FLAG((tty), OFILL)
134#define O_OFDEL(tty) _O_FLAG((tty), OFDEL)
135#define O_NLDLY(tty) _O_FLAG((tty), NLDLY)
136#define O_CRDLY(tty) _O_FLAG((tty), CRDLY)
137#define O_TABDLY(tty) _O_FLAG((tty), TABDLY)
138#define O_BSDLY(tty) _O_FLAG((tty), BSDLY)
139#define O_VTDLY(tty) _O_FLAG((tty), VTDLY)
140#define O_FFDLY(tty) _O_FLAG((tty), FFDLY)
141
142#define C_BAUD(tty) _C_FLAG((tty), CBAUD)
143#define C_CSIZE(tty) _C_FLAG((tty), CSIZE)
144#define C_CSTOPB(tty) _C_FLAG((tty), CSTOPB)
145#define C_CREAD(tty) _C_FLAG((tty), CREAD)
146#define C_PARENB(tty) _C_FLAG((tty), PARENB)
147#define C_PARODD(tty) _C_FLAG((tty), PARODD)
148#define C_HUPCL(tty) _C_FLAG((tty), HUPCL)
149#define C_CLOCAL(tty) _C_FLAG((tty), CLOCAL)
150#define C_CIBAUD(tty) _C_FLAG((tty), CIBAUD)
151#define C_CRTSCTS(tty) _C_FLAG((tty), CRTSCTS)
152
153#define L_ISIG(tty) _L_FLAG((tty), ISIG)
154#define L_ICANON(tty) _L_FLAG((tty), ICANON)
155#define L_XCASE(tty) _L_FLAG((tty), XCASE)
156#define L_ECHO(tty) _L_FLAG((tty), ECHO)
157#define L_ECHOE(tty) _L_FLAG((tty), ECHOE)
158#define L_ECHOK(tty) _L_FLAG((tty), ECHOK)
159#define L_ECHONL(tty) _L_FLAG((tty), ECHONL)
160#define L_NOFLSH(tty) _L_FLAG((tty), NOFLSH)
161#define L_TOSTOP(tty) _L_FLAG((tty), TOSTOP)
162#define L_ECHOCTL(tty) _L_FLAG((tty), ECHOCTL)
163#define L_ECHOPRT(tty) _L_FLAG((tty), ECHOPRT)
164#define L_ECHOKE(tty) _L_FLAG((tty), ECHOKE)
165#define L_FLUSHO(tty) _L_FLAG((tty), FLUSHO)
166#define L_PENDIN(tty) _L_FLAG((tty), PENDIN)
167#define L_IEXTEN(tty) _L_FLAG((tty), IEXTEN)
1da177e4
LT		 168
169struct device;
522ed776 170struct signal_struct;
6f67048c
AC		 171
172/*
173 * Port level information. Each device keeps its own port level information
174 * so provide a common structure for those ports wanting to use common support
175 * routines.
176 *
177 * The tty port has a different lifetime to the tty so must be kept apart.
178 * In addition be careful as tty -> port mappings are valid for the life
179 * of the tty object but in many cases port -> tty mappings are valid only
180 * until a hangup so don't use the wrong path.
181 */
7a4d29f4 182
31f35939
AC		 183struct tty_port;
184
185struct tty_port_operations {
186 /* Return 1 if the carrier is raised */
187 int (*carrier_raised)(struct tty_port *port);
5d951fb4 188 void (*raise_dtr_rts)(struct tty_port *port);
31f35939
AC		 189};
190
6f67048c
AC		 191struct tty_port {
192 struct tty_struct *tty; /* Back pointer */
31f35939 193 const struct tty_port_operations *ops; /* Port operations */
4a90f09b 194 spinlock_t lock; /* Lock protecting tty field */
6f67048c
AC		 195 int blocked_open; /* Waiting to open */
196 int count; /* Usage count */
197 wait_queue_head_t open_wait; /* Open waiters */
198 wait_queue_head_t close_wait; /* Close waiters */
199 unsigned long flags; /* TTY flags ASY_*/
200 struct mutex mutex; /* Locking */
201 unsigned char *xmit_buf; /* Optional buffer */
44b7d1b3
AC		 202 int close_delay; /* Close port delay */
203 int closing_wait; /* Delay for output */
6f67048c
AC		 204};
205
1da177e4
LT		 206/*
207 * Where all of the state associated with a tty is kept while the tty
208 * is open. Since the termios state should be kept even if the tty
209 * has been closed --- for things like the baud rate, etc --- it is
210 * not stored here, but rather a pointer to the real state is stored
211 * here. Possible the winsize structure should have the same
212 * treatment, but (1) the default 80x24 is usually right and (2) it's
213 * most often used by a windowing system, which will set the correct
214 * size each time the window is created or resized anyway.
215 * - TYT, 9/14/92
216 */
f34d7a5b
AC		 217
218struct tty_operations;
219
1da177e4
LT		 220struct tty_struct {
221 int magic;
9c9f4ded 222 struct kref kref;
1da177e4 223 struct tty_driver *driver;
f34d7a5b 224 const struct tty_operations *ops;
1da177e4 225 int index;
a352def2 226 /* The ldisc objects are protected by tty_ldisc_lock at the moment */
1da177e4 227 struct tty_ldisc ldisc;
5785c95b 228 struct mutex termios_mutex;
04f378b1 229 spinlock_t ctrl_lock;
47f86834 230 /* Termios values are protected by the termios mutex */
edc6afc5 231 struct ktermios *termios, *termios_locked;
1d65b4a0 232 struct termiox *termiox; /* May be NULL for unsupported */
1da177e4 233 char name[64];
47f86834 234 struct pid *pgrp; /* Protected by ctrl lock */
ab521dc0 235 struct pid *session;
1da177e4
LT		 236 unsigned long flags;
237 int count;
47f86834 238 struct winsize winsize; /* termios mutex */
1da177e4
LT		 239 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
240 unsigned char low_latency:1, warned:1;
47f86834 241 unsigned char ctrl_status; /* ctrl_lock */
33f0f88f 242 unsigned int receive_room; /* Bytes free for queue */
1da177e4
LT		 243
244 struct tty_struct *link;
245 struct fasync_struct *fasync;
47f86834 246 struct tty_bufhead buf; /* Locked internally */
1da177e4
LT		 247 int alt_speed; /* For magic substitution of 38400 bps */
248 wait_queue_head_t write_wait;
249 wait_queue_head_t read_wait;
250 struct work_struct hangup_work;
251 void *disc_data;
252 void *driver_data;
253 struct list_head tty_files;
254
255#define N_TTY_BUF_SIZE 4096
6f67048c 256
1da177e4
LT		 257 /*
258 * The following is data for the N_TTY line discipline. For
259 * historical reasons, this is included in the tty structure.
47f86834 260 * Mostly locked by the BKL.
1da177e4
LT		 261 */
262 unsigned int column;
263 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
264 unsigned char closing:1;
a88a69c9 265 unsigned char echo_overrun:1;
1da177e4
LT		 266 unsigned short minimum_to_wake;
267 unsigned long overrun_time;
268 int num_overrun;
269 unsigned long process_char_map[256/(8*sizeof(unsigned long))];
270 char *read_buf;
271 int read_head;
272 int read_tail;
273 int read_cnt;
274 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
a88a69c9
JP		 275 unsigned char *echo_buf;
276 unsigned int echo_pos;
277 unsigned int echo_cnt;
1da177e4
LT		 278 int canon_data;
279 unsigned long canon_head;
280 unsigned int canon_column;
70522e12
IM		 281 struct mutex atomic_read_lock;
282 struct mutex atomic_write_lock;
a88a69c9
JP		 283 struct mutex output_lock;
284 struct mutex echo_lock;
1da177e4
LT		 285 unsigned char *write_buf;
286 int write_cnt;
287 spinlock_t read_lock;
288 /* If the tty has a pending do_SAK, queue it here - akpm */
289 struct work_struct SAK_work;
6f67048c 290 struct tty_port *port;
1da177e4
LT		 291};
292
293/* tty magic number */
294#define TTY_MAGIC 0x5401
295
296/*
297 * These bits are used in the flags field of the tty structure.
7a4d29f4 298 *
1da177e4
LT		 299 * So that interrupts won't be able to mess up the queues,
300 * copy_to_cooked must be atomic with respect to itself, as must
301 * tty->write. Thus, you must use the inline functions set_bit() and
302 * clear_bit() to make things atomic.
303 */
304#define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */
7a4d29f4 305#define TTY_IO_ERROR 1 /* Cause an I/O error (may be no ldisc too) */
1da177e4
LT		 306#define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */
307#define TTY_EXCLUSIVE 3 /* Exclusive open mode */
308#define TTY_DEBUG 4 /* Debugging */
309#define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */
310#define TTY_PUSH 6 /* n_tty private */
311#define TTY_CLOSING 7 /* ->close() in progress */
1da177e4 312#define TTY_LDISC 9 /* Line discipline attached */
c9b3976e 313#define TTY_LDISC_CHANGING 10 /* Line discipline changing */
1da177e4
LT		 314#define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
315#define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
316#define TTY_PTY_LOCK 16 /* pty private */
317#define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
318#define TTY_HUPPED 18 /* Post driver->hangup() */
42fd552e
AC		 319#define TTY_FLUSHING 19 /* Flushing to ldisc in progress */
320#define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */
1da177e4
LT		 321
322#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
323
324extern void tty_write_flush(struct tty_struct *);
325
edc6afc5 326extern struct ktermios tty_std_termios;
1da177e4
LT		 327
328extern int kmsg_redirect;
329
330extern void console_init(void);
331extern int vcs_init(void);
332
d81ed103
AC		 333extern struct class *tty_class;
334
9c9f4ded
AC		 335/**
336 * tty_kref_get - get a tty reference
337 * @tty: tty device
338 *
339 * Return a new reference to a tty object. The caller must hold
340 * sufficient locks/counts to ensure that their existing reference cannot
341 * go away
342 */
343
14bfc987 344static inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
9c9f4ded
AC		 345{
346 if (tty)
347 kref_get(&tty->kref);
348 return tty;
349}
350extern void tty_kref_put(struct tty_struct *tty);
351
1da177e4
LT		 352extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
353 const char *routine);
354extern char *tty_name(struct tty_struct *tty, char *buf);
7a4d29f4
AC		 355extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
356extern int tty_check_change(struct tty_struct *tty);
357extern void stop_tty(struct tty_struct *tty);
358extern void start_tty(struct tty_struct *tty);
1da177e4
LT		 359extern int tty_register_driver(struct tty_driver *driver);
360extern int tty_unregister_driver(struct tty_driver *driver);
01107d34
GKH		 361extern struct device *tty_register_device(struct tty_driver *driver,
362 unsigned index, struct device *dev);
1da177e4
LT		 363extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
364extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
365 int buflen);
366extern void tty_write_message(struct tty_struct *tty, char *msg);
f34d7a5b
AC		 367extern int tty_put_char(struct tty_struct *tty, unsigned char c);
368extern int tty_chars_in_buffer(struct tty_struct *tty);
369extern int tty_write_room(struct tty_struct *tty);
370extern void tty_driver_flush_buffer(struct tty_struct *tty);
39c2e60f
AC		 371extern void tty_throttle(struct tty_struct *tty);
372extern void tty_unthrottle(struct tty_struct *tty);
fc6f6238 373extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
feebed65
AC		 374extern void tty_shutdown(struct tty_struct *tty);
375extern void tty_free_termios(struct tty_struct *tty);
3e7cd6c4 376extern int is_current_pgrp_orphaned(void);
5d0fdf1e 377extern struct pid *tty_get_pgrp(struct tty_struct *tty);
1da177e4
LT		 378extern int is_ignored(int sig);
379extern int tty_signal(int sig, struct tty_struct *tty);
7a4d29f4
AC		 380extern void tty_hangup(struct tty_struct *tty);
381extern void tty_vhangup(struct tty_struct *tty);
2cb5998b 382extern void tty_vhangup_self(void);
1da177e4 383extern void tty_unhangup(struct file *filp);
7a4d29f4 384extern int tty_hung_up_p(struct file *filp);
1da177e4 385extern void do_SAK(struct tty_struct *tty);
8b6312f4 386extern void __do_SAK(struct tty_struct *tty);
1da177e4 387extern void disassociate_ctty(int priv);
98a27ba4 388extern void no_tty(void);
1da177e4 389extern void tty_flip_buffer_push(struct tty_struct *tty);
e0495736
AC		 390extern void tty_buffer_free_all(struct tty_struct *tty);
391extern void tty_buffer_flush(struct tty_struct *tty);
392extern void tty_buffer_init(struct tty_struct *tty);
edc6afc5
AC		 393extern speed_t tty_get_baud_rate(struct tty_struct *tty);
394extern speed_t tty_termios_baud_rate(struct ktermios *termios);
395extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
7a4d29f4
AC		 396extern void tty_termios_encode_baud_rate(struct ktermios *termios,
397 speed_t ibaud, speed_t obaud);
398extern void tty_encode_baud_rate(struct tty_struct *tty,
399 speed_t ibaud, speed_t obaud);
5f519d72 400extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
bf5e5834 401extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
1da177e4
LT		 402
403extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
404extern void tty_ldisc_deref(struct tty_ldisc *);
405extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
a352def2 406extern const struct file_operations tty_ldiscs_proc_fops;
1da177e4
LT		 407
408extern void tty_wakeup(struct tty_struct *tty);
409extern void tty_ldisc_flush(struct tty_struct *tty);
410
04f378b1 411extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
0fc00e24
AC		 412extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
413 unsigned int cmd, unsigned long arg);
414extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
24ec839c
PZ		 415extern dev_t tty_devnum(struct tty_struct *tty);
416extern void proc_clear_tty(struct task_struct *p);
24ec839c 417extern struct tty_struct *get_current_tty(void);
d81ed103 418extern void tty_default_fops(struct file_operations *fops);
bf970ee4
AC		 419extern struct tty_struct *alloc_tty_struct(void);
420extern void free_tty_struct(struct tty_struct *tty);
421extern void initialize_tty_struct(struct tty_struct *tty,
422 struct tty_driver *driver, int idx);
73ec06fc
AC		 423extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
424 int first_ok);
d81ed103 425extern void tty_release_dev(struct file *filp);
bf970ee4 426extern int tty_init_termios(struct tty_struct *tty);
24ec839c 427
70522e12 428extern struct mutex tty_mutex;
1da177e4 429
9c1729db
AC		 430extern void tty_write_unlock(struct tty_struct *tty);
431extern int tty_write_lock(struct tty_struct *tty, int ndelay);
432#define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))
433
6f67048c
AC		 434extern void tty_port_init(struct tty_port *port);
435extern int tty_port_alloc_xmit_buf(struct tty_port *port);
436extern void tty_port_free_xmit_buf(struct tty_port *port);
4a90f09b
AC		 437extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
438extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
31f35939 439extern int tty_port_carrier_raised(struct tty_port *port);
5d951fb4 440extern void tty_port_raise_dtr_rts(struct tty_port *port);
3e61696b 441extern void tty_port_hangup(struct tty_port *port);
6f67048c 442
01e1abb2
AC		 443extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
444extern int tty_unregister_ldisc(int disc);
445extern int tty_set_ldisc(struct tty_struct *tty, int ldisc);
446extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
447extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty);
448extern void tty_ldisc_init(struct tty_struct *tty);
449extern void tty_ldisc_begin(void);
450/* This last one is just for the tty layer internals and shouldn't be used elsewhere */
451extern void tty_ldisc_enable(struct tty_struct *tty);
9c1729db
AC		 452
453
1da177e4 454/* n_tty.c */
a352def2 455extern struct tty_ldisc_ops tty_ldisc_N_TTY;
1da177e4 456
522ed776
MT		 457/* tty_audit.c */
458#ifdef CONFIG_AUDIT
459extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
460 size_t size);
461extern void tty_audit_exit(void);
462extern void tty_audit_fork(struct signal_struct *sig);
1e641743 463extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
522ed776 464extern void tty_audit_push(struct tty_struct *tty);
7a4d29f4
AC		 465extern void tty_audit_push_task(struct task_struct *tsk,
466 uid_t loginuid, u32 sessionid);
522ed776
MT		 467#else
468static inline void tty_audit_add_data(struct tty_struct *tty,
469 unsigned char *data, size_t size)
470{
471}
1e641743
AV		 472static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
473{
474}
522ed776
MT		 475static inline void tty_audit_exit(void)
476{
477}
478static inline void tty_audit_fork(struct signal_struct *sig)
479{
480}
481static inline void tty_audit_push(struct tty_struct *tty)
482{
483}
7a4d29f4
AC		 484static inline void tty_audit_push_task(struct task_struct *tsk,
485 uid_t loginuid, u32 sessionid)
522ed776
MT		 486{
487}
522ed776
MT		 488#endif
489
1da177e4 490/* tty_ioctl.c */
47afa7a5 491extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
1da177e4
LT		 492 unsigned int cmd, unsigned long arg);
493
494/* serial.c */
495
496extern void serial_console_init(void);
7a4d29f4 497
1da177e4
LT		 498/* pcxx.c */
499
500extern int pcxe_open(struct tty_struct *tty, struct file *filp);
501
502/* printk.c */
503
504extern void console_print(const char *);
505
506/* vt.c */
507
7a4d29f4 508extern int vt_ioctl(struct tty_struct *tty, struct file *file,
1da177e4
LT		 509 unsigned int cmd, unsigned long arg);
510
1da177e4
LT		 511#endif /* __KERNEL__ */
512#endif
Linux 6.x block layer and io_uring tree(s)