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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 30 |
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 | #define N_V253 19 /* Codec control over voice modem */ |
50 | #define N_CAIF 20 /* CAIF protocol for talking to modems */ |
51 | #define N_GSM0710 21 /* GSM 0710 Mux */ |
52 | #define N_TI_WL 22 /* for TI's WL BT, FM, GPS combo chips */ |
53 | #define N_TRACESINK 23 /* Trace data routing for MIPI P1149.7 */ |
54 | #define N_TRACEROUTER 24 /* Trace data routing for MIPI P1149.7 */ |
55 | |
56 | /* |
57 | * This character is the same as _POSIX_VDISABLE: it cannot be used as |
58 | * a c_cc[] character, but indicates that a particular special character |
59 | * isn't in use (eg VINTR has no character etc) |
60 | */ |
61 | #define __DISABLED_CHAR '\0' |
62 | |
63 | struct tty_buffer { |
64 | struct tty_buffer *next; |
65 | char *char_buf_ptr; |
66 | unsigned char *flag_buf_ptr; |
67 | int used; |
68 | int size; |
69 | int commit; |
70 | int read; |
71 | /* Data points here */ |
72 | unsigned long data[0]; |
73 | }; |
74 | |
75 | /* |
76 | * We default to dicing tty buffer allocations to this many characters |
77 | * in order to avoid multiple page allocations. We know the size of |
78 | * tty_buffer itself but it must also be taken into account that the |
79 | * the buffer is 256 byte aligned. See tty_buffer_find for the allocation |
80 | * logic this must match |
81 | */ |
82 | |
83 | #define TTY_BUFFER_PAGE (((PAGE_SIZE - sizeof(struct tty_buffer)) / 2) & ~0xFF) |
84 | |
85 | |
86 | struct tty_bufhead { |
87 | struct work_struct work; |
88 | spinlock_t lock; |
89 | struct tty_buffer *head; /* Queue head */ |
90 | struct tty_buffer *tail; /* Active buffer */ |
91 | struct tty_buffer *free; /* Free queue head */ |
92 | int memory_used; /* Buffer space used excluding |
93 | free queue */ |
94 | }; |
95 | /* |
96 | * When a break, frame error, or parity error happens, these codes are |
97 | * stuffed into the flags buffer. |
98 | */ |
99 | #define TTY_NORMAL 0 |
100 | #define TTY_BREAK 1 |
101 | #define TTY_FRAME 2 |
102 | #define TTY_PARITY 3 |
103 | #define TTY_OVERRUN 4 |
104 | |
105 | #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR]) |
106 | #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT]) |
107 | #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE]) |
108 | #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL]) |
109 | #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF]) |
110 | #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME]) |
111 | #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN]) |
112 | #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC]) |
113 | #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART]) |
114 | #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP]) |
115 | #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP]) |
116 | #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL]) |
117 | #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT]) |
118 | #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD]) |
119 | #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE]) |
120 | #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT]) |
121 | #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2]) |
122 | |
123 | #define _I_FLAG(tty, f) ((tty)->termios->c_iflag & (f)) |
124 | #define _O_FLAG(tty, f) ((tty)->termios->c_oflag & (f)) |
125 | #define _C_FLAG(tty, f) ((tty)->termios->c_cflag & (f)) |
126 | #define _L_FLAG(tty, f) ((tty)->termios->c_lflag & (f)) |
127 | |
128 | #define I_IGNBRK(tty) _I_FLAG((tty), IGNBRK) |
129 | #define I_BRKINT(tty) _I_FLAG((tty), BRKINT) |
130 | #define I_IGNPAR(tty) _I_FLAG((tty), IGNPAR) |
131 | #define I_PARMRK(tty) _I_FLAG((tty), PARMRK) |
132 | #define I_INPCK(tty) _I_FLAG((tty), INPCK) |
133 | #define I_ISTRIP(tty) _I_FLAG((tty), ISTRIP) |
134 | #define I_INLCR(tty) _I_FLAG((tty), INLCR) |
135 | #define I_IGNCR(tty) _I_FLAG((tty), IGNCR) |
136 | #define I_ICRNL(tty) _I_FLAG((tty), ICRNL) |
137 | #define I_IUCLC(tty) _I_FLAG((tty), IUCLC) |
138 | #define I_IXON(tty) _I_FLAG((tty), IXON) |
139 | #define I_IXANY(tty) _I_FLAG((tty), IXANY) |
140 | #define I_IXOFF(tty) _I_FLAG((tty), IXOFF) |
141 | #define I_IMAXBEL(tty) _I_FLAG((tty), IMAXBEL) |
142 | #define I_IUTF8(tty) _I_FLAG((tty), IUTF8) |
143 | |
144 | #define O_OPOST(tty) _O_FLAG((tty), OPOST) |
145 | #define O_OLCUC(tty) _O_FLAG((tty), OLCUC) |
146 | #define O_ONLCR(tty) _O_FLAG((tty), ONLCR) |
147 | #define O_OCRNL(tty) _O_FLAG((tty), OCRNL) |
148 | #define O_ONOCR(tty) _O_FLAG((tty), ONOCR) |
149 | #define O_ONLRET(tty) _O_FLAG((tty), ONLRET) |
150 | #define O_OFILL(tty) _O_FLAG((tty), OFILL) |
151 | #define O_OFDEL(tty) _O_FLAG((tty), OFDEL) |
152 | #define O_NLDLY(tty) _O_FLAG((tty), NLDLY) |
153 | #define O_CRDLY(tty) _O_FLAG((tty), CRDLY) |
154 | #define O_TABDLY(tty) _O_FLAG((tty), TABDLY) |
155 | #define O_BSDLY(tty) _O_FLAG((tty), BSDLY) |
156 | #define O_VTDLY(tty) _O_FLAG((tty), VTDLY) |
157 | #define O_FFDLY(tty) _O_FLAG((tty), FFDLY) |
158 | |
159 | #define C_BAUD(tty) _C_FLAG((tty), CBAUD) |
160 | #define C_CSIZE(tty) _C_FLAG((tty), CSIZE) |
161 | #define C_CSTOPB(tty) _C_FLAG((tty), CSTOPB) |
162 | #define C_CREAD(tty) _C_FLAG((tty), CREAD) |
163 | #define C_PARENB(tty) _C_FLAG((tty), PARENB) |
164 | #define C_PARODD(tty) _C_FLAG((tty), PARODD) |
165 | #define C_HUPCL(tty) _C_FLAG((tty), HUPCL) |
166 | #define C_CLOCAL(tty) _C_FLAG((tty), CLOCAL) |
167 | #define C_CIBAUD(tty) _C_FLAG((tty), CIBAUD) |
168 | #define C_CRTSCTS(tty) _C_FLAG((tty), CRTSCTS) |
169 | |
170 | #define L_ISIG(tty) _L_FLAG((tty), ISIG) |
171 | #define L_ICANON(tty) _L_FLAG((tty), ICANON) |
172 | #define L_XCASE(tty) _L_FLAG((tty), XCASE) |
173 | #define L_ECHO(tty) _L_FLAG((tty), ECHO) |
174 | #define L_ECHOE(tty) _L_FLAG((tty), ECHOE) |
175 | #define L_ECHOK(tty) _L_FLAG((tty), ECHOK) |
176 | #define L_ECHONL(tty) _L_FLAG((tty), ECHONL) |
177 | #define L_NOFLSH(tty) _L_FLAG((tty), NOFLSH) |
178 | #define L_TOSTOP(tty) _L_FLAG((tty), TOSTOP) |
179 | #define L_ECHOCTL(tty) _L_FLAG((tty), ECHOCTL) |
180 | #define L_ECHOPRT(tty) _L_FLAG((tty), ECHOPRT) |
181 | #define L_ECHOKE(tty) _L_FLAG((tty), ECHOKE) |
182 | #define L_FLUSHO(tty) _L_FLAG((tty), FLUSHO) |
183 | #define L_PENDIN(tty) _L_FLAG((tty), PENDIN) |
184 | #define L_IEXTEN(tty) _L_FLAG((tty), IEXTEN) |
185 | #define L_EXTPROC(tty) _L_FLAG((tty), EXTPROC) |
186 | |
187 | struct device; |
188 | struct signal_struct; |
189 | |
190 | /* |
191 | * Port level information. Each device keeps its own port level information |
192 | * so provide a common structure for those ports wanting to use common support |
193 | * routines. |
194 | * |
195 | * The tty port has a different lifetime to the tty so must be kept apart. |
196 | * In addition be careful as tty -> port mappings are valid for the life |
197 | * of the tty object but in many cases port -> tty mappings are valid only |
198 | * until a hangup so don't use the wrong path. |
199 | */ |
200 | |
201 | struct tty_port; |
202 | |
203 | struct tty_port_operations { |
204 | /* Return 1 if the carrier is raised */ |
205 | int (*carrier_raised)(struct tty_port *port); |
206 | /* Control the DTR line */ |
207 | void (*dtr_rts)(struct tty_port *port, int raise); |
208 | /* Called when the last close completes or a hangup finishes |
209 | IFF the port was initialized. Do not use to free resources. Called |
210 | under the port mutex to serialize against activate/shutdowns */ |
211 | void (*shutdown)(struct tty_port *port); |
212 | void (*drop)(struct tty_port *port); |
213 | /* Called under the port mutex from tty_port_open, serialized using |
214 | the port mutex */ |
215 | /* FIXME: long term getting the tty argument *out* of this would be |
216 | good for consoles */ |
217 | int (*activate)(struct tty_port *port, struct tty_struct *tty); |
218 | /* Called on the final put of a port */ |
219 | void (*destruct)(struct tty_port *port); |
220 | }; |
221 | |
222 | struct tty_port { |
223 | struct tty_struct *tty; /* Back pointer */ |
224 | const struct tty_port_operations *ops; /* Port operations */ |
225 | spinlock_t lock; /* Lock protecting tty field */ |
226 | int blocked_open; /* Waiting to open */ |
227 | int count; /* Usage count */ |
228 | wait_queue_head_t open_wait; /* Open waiters */ |
229 | wait_queue_head_t close_wait; /* Close waiters */ |
230 | wait_queue_head_t delta_msr_wait; /* Modem status change */ |
231 | unsigned long flags; /* TTY flags ASY_*/ |
232 | unsigned char console:1; /* port is a console */ |
233 | struct mutex mutex; /* Locking */ |
234 | struct mutex buf_mutex; /* Buffer alloc lock */ |
235 | unsigned char *xmit_buf; /* Optional buffer */ |
236 | unsigned int close_delay; /* Close port delay */ |
237 | unsigned int closing_wait; /* Delay for output */ |
238 | int drain_delay; /* Set to zero if no pure time |
239 | based drain is needed else |
240 | set to size of fifo */ |
241 | struct kref kref; /* Ref counter */ |
242 | }; |
243 | |
244 | /* |
245 | * Where all of the state associated with a tty is kept while the tty |
246 | * is open. Since the termios state should be kept even if the tty |
247 | * has been closed --- for things like the baud rate, etc --- it is |
248 | * not stored here, but rather a pointer to the real state is stored |
249 | * here. Possible the winsize structure should have the same |
250 | * treatment, but (1) the default 80x24 is usually right and (2) it's |
251 | * most often used by a windowing system, which will set the correct |
252 | * size each time the window is created or resized anyway. |
253 | * - TYT, 9/14/92 |
254 | */ |
255 | |
256 | struct tty_operations; |
257 | |
258 | struct tty_struct { |
259 | int magic; |
260 | struct kref kref; |
261 | struct device *dev; |
262 | struct tty_driver *driver; |
263 | const struct tty_operations *ops; |
264 | int index; |
265 | |
266 | /* Protects ldisc changes: Lock tty not pty */ |
267 | struct mutex ldisc_mutex; |
268 | struct tty_ldisc *ldisc; |
269 | |
270 | struct mutex termios_mutex; |
271 | spinlock_t ctrl_lock; |
272 | /* Termios values are protected by the termios mutex */ |
273 | struct ktermios *termios, *termios_locked; |
274 | struct termiox *termiox; /* May be NULL for unsupported */ |
275 | char name[64]; |
276 | struct pid *pgrp; /* Protected by ctrl lock */ |
277 | struct pid *session; |
278 | unsigned long flags; |
279 | int count; |
280 | struct winsize winsize; /* termios mutex */ |
281 | unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1; |
282 | unsigned char low_latency:1, warned:1; |
283 | unsigned char ctrl_status; /* ctrl_lock */ |
284 | unsigned int receive_room; /* Bytes free for queue */ |
285 | |
286 | struct tty_struct *link; |
287 | struct fasync_struct *fasync; |
288 | struct tty_bufhead buf; /* Locked internally */ |
289 | int alt_speed; /* For magic substitution of 38400 bps */ |
290 | wait_queue_head_t write_wait; |
291 | wait_queue_head_t read_wait; |
292 | struct work_struct hangup_work; |
293 | void *disc_data; |
294 | void *driver_data; |
295 | struct list_head tty_files; |
296 | |
297 | #define N_TTY_BUF_SIZE 4096 |
298 | |
299 | /* |
300 | * The following is data for the N_TTY line discipline. For |
301 | * historical reasons, this is included in the tty structure. |
302 | * Mostly locked by the BKL. |
303 | */ |
304 | unsigned int column; |
305 | unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1; |
306 | unsigned char closing:1; |
307 | unsigned char echo_overrun:1; |
308 | unsigned short minimum_to_wake; |
309 | unsigned long overrun_time; |
310 | int num_overrun; |
311 | unsigned long process_char_map[256/(8*sizeof(unsigned long))]; |
312 | char *read_buf; |
313 | int read_head; |
314 | int read_tail; |
315 | int read_cnt; |
316 | unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))]; |
317 | unsigned char *echo_buf; |
318 | unsigned int echo_pos; |
319 | unsigned int echo_cnt; |
320 | int canon_data; |
321 | unsigned long canon_head; |
322 | unsigned int canon_column; |
323 | struct mutex atomic_read_lock; |
324 | struct mutex atomic_write_lock; |
325 | struct mutex output_lock; |
326 | struct mutex echo_lock; |
327 | unsigned char *write_buf; |
328 | int write_cnt; |
329 | spinlock_t read_lock; |
330 | /* If the tty has a pending do_SAK, queue it here - akpm */ |
331 | struct work_struct SAK_work; |
332 | struct tty_port *port; |
333 | }; |
334 | |
335 | /* Each of a tty's open files has private_data pointing to tty_file_private */ |
336 | struct tty_file_private { |
337 | struct tty_struct *tty; |
338 | struct file *file; |
339 | struct list_head list; |
340 | }; |
341 | |
342 | /* tty magic number */ |
343 | #define TTY_MAGIC 0x5401 |
344 | |
345 | /* |
346 | * These bits are used in the flags field of the tty structure. |
347 | * |
348 | * So that interrupts won't be able to mess up the queues, |
349 | * copy_to_cooked must be atomic with respect to itself, as must |
350 | * tty->write. Thus, you must use the inline functions set_bit() and |
351 | * clear_bit() to make things atomic. |
352 | */ |
353 | #define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */ |
354 | #define TTY_IO_ERROR 1 /* Cause an I/O error (may be no ldisc too) */ |
355 | #define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */ |
356 | #define TTY_EXCLUSIVE 3 /* Exclusive open mode */ |
357 | #define TTY_DEBUG 4 /* Debugging */ |
358 | #define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */ |
359 | #define TTY_PUSH 6 /* n_tty private */ |
360 | #define TTY_CLOSING 7 /* ->close() in progress */ |
361 | #define TTY_LDISC 9 /* Line discipline attached */ |
362 | #define TTY_LDISC_CHANGING 10 /* Line discipline changing */ |
363 | #define TTY_LDISC_OPEN 11 /* Line discipline is open */ |
364 | #define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */ |
365 | #define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */ |
366 | #define TTY_PTY_LOCK 16 /* pty private */ |
367 | #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ |
368 | #define TTY_HUPPED 18 /* Post driver->hangup() */ |
369 | #define TTY_FLUSHING 19 /* Flushing to ldisc in progress */ |
370 | #define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */ |
371 | #define TTY_HUPPING 21 /* ->hangup() in progress */ |
372 | |
373 | #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) |
374 | |
375 | extern void tty_write_flush(struct tty_struct *); |
376 | |
377 | extern struct ktermios tty_std_termios; |
378 | |
379 | extern void console_init(void); |
380 | extern int vcs_init(void); |
381 | |
382 | extern struct class *tty_class; |
383 | |
384 | /** |
385 | * tty_kref_get - get a tty reference |
386 | * @tty: tty device |
387 | * |
388 | * Return a new reference to a tty object. The caller must hold |
389 | * sufficient locks/counts to ensure that their existing reference cannot |
390 | * go away |
391 | */ |
392 | |
393 | static inline struct tty_struct *tty_kref_get(struct tty_struct *tty) |
394 | { |
395 | if (tty) |
396 | kref_get(&tty->kref); |
397 | return tty; |
398 | } |
399 | extern void tty_kref_put(struct tty_struct *tty); |
400 | |
401 | extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode, |
402 | const char *routine); |
403 | extern char *tty_name(struct tty_struct *tty, char *buf); |
404 | extern void tty_wait_until_sent(struct tty_struct *tty, long timeout); |
405 | extern int tty_check_change(struct tty_struct *tty); |
406 | extern void stop_tty(struct tty_struct *tty); |
407 | extern void start_tty(struct tty_struct *tty); |
408 | extern int tty_register_driver(struct tty_driver *driver); |
409 | extern int tty_unregister_driver(struct tty_driver *driver); |
410 | extern struct device *tty_register_device(struct tty_driver *driver, |
411 | unsigned index, struct device *dev); |
412 | extern void tty_unregister_device(struct tty_driver *driver, unsigned index); |
413 | extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp, |
414 | int buflen); |
415 | extern void tty_write_message(struct tty_struct *tty, char *msg); |
416 | extern int tty_put_char(struct tty_struct *tty, unsigned char c); |
417 | extern int tty_chars_in_buffer(struct tty_struct *tty); |
418 | extern int tty_write_room(struct tty_struct *tty); |
419 | extern void tty_driver_flush_buffer(struct tty_struct *tty); |
420 | extern void tty_throttle(struct tty_struct *tty); |
421 | extern void tty_unthrottle(struct tty_struct *tty); |
422 | extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws); |
423 | extern void tty_shutdown(struct tty_struct *tty); |
424 | extern void tty_free_termios(struct tty_struct *tty); |
425 | extern int is_current_pgrp_orphaned(void); |
426 | extern struct pid *tty_get_pgrp(struct tty_struct *tty); |
427 | extern int is_ignored(int sig); |
428 | extern int tty_signal(int sig, struct tty_struct *tty); |
429 | extern void tty_hangup(struct tty_struct *tty); |
430 | extern void tty_vhangup(struct tty_struct *tty); |
431 | extern void tty_vhangup_locked(struct tty_struct *tty); |
432 | extern void tty_vhangup_self(void); |
433 | extern void tty_unhangup(struct file *filp); |
434 | extern int tty_hung_up_p(struct file *filp); |
435 | extern void do_SAK(struct tty_struct *tty); |
436 | extern void __do_SAK(struct tty_struct *tty); |
437 | extern void disassociate_ctty(int priv); |
438 | extern void no_tty(void); |
439 | extern void tty_flip_buffer_push(struct tty_struct *tty); |
440 | extern void tty_flush_to_ldisc(struct tty_struct *tty); |
441 | extern void tty_buffer_free_all(struct tty_struct *tty); |
442 | extern void tty_buffer_flush(struct tty_struct *tty); |
443 | extern void tty_buffer_init(struct tty_struct *tty); |
444 | extern speed_t tty_get_baud_rate(struct tty_struct *tty); |
445 | extern speed_t tty_termios_baud_rate(struct ktermios *termios); |
446 | extern speed_t tty_termios_input_baud_rate(struct ktermios *termios); |
447 | extern void tty_termios_encode_baud_rate(struct ktermios *termios, |
448 | speed_t ibaud, speed_t obaud); |
449 | extern void tty_encode_baud_rate(struct tty_struct *tty, |
450 | speed_t ibaud, speed_t obaud); |
451 | extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old); |
452 | extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b); |
453 | extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt); |
454 | |
455 | extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *); |
456 | extern void tty_ldisc_deref(struct tty_ldisc *); |
457 | extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *); |
458 | extern void tty_ldisc_hangup(struct tty_struct *tty); |
459 | extern const struct file_operations tty_ldiscs_proc_fops; |
460 | |
461 | extern void tty_wakeup(struct tty_struct *tty); |
462 | extern void tty_ldisc_flush(struct tty_struct *tty); |
463 | |
464 | extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
465 | extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file, |
466 | unsigned int cmd, unsigned long arg); |
467 | extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg); |
468 | extern dev_t tty_devnum(struct tty_struct *tty); |
469 | extern void proc_clear_tty(struct task_struct *p); |
470 | extern struct tty_struct *get_current_tty(void); |
471 | extern void tty_default_fops(struct file_operations *fops); |
472 | extern struct tty_struct *alloc_tty_struct(void); |
473 | extern int tty_add_file(struct tty_struct *tty, struct file *file); |
474 | extern void free_tty_struct(struct tty_struct *tty); |
475 | extern void initialize_tty_struct(struct tty_struct *tty, |
476 | struct tty_driver *driver, int idx); |
477 | extern void deinitialize_tty_struct(struct tty_struct *tty); |
478 | extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, |
479 | int first_ok); |
480 | extern int tty_release(struct inode *inode, struct file *filp); |
481 | extern int tty_init_termios(struct tty_struct *tty); |
482 | |
483 | extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty); |
484 | extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty); |
485 | |
486 | extern struct mutex tty_mutex; |
487 | extern spinlock_t tty_files_lock; |
488 | |
489 | extern void tty_write_unlock(struct tty_struct *tty); |
490 | extern int tty_write_lock(struct tty_struct *tty, int ndelay); |
491 | #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock)) |
492 | |
493 | extern void tty_port_init(struct tty_port *port); |
494 | extern int tty_port_alloc_xmit_buf(struct tty_port *port); |
495 | extern void tty_port_free_xmit_buf(struct tty_port *port); |
496 | extern void tty_port_put(struct tty_port *port); |
497 | |
498 | static inline struct tty_port *tty_port_get(struct tty_port *port) |
499 | { |
500 | if (port) |
501 | kref_get(&port->kref); |
502 | return port; |
503 | } |
504 | |
505 | extern struct tty_struct *tty_port_tty_get(struct tty_port *port); |
506 | extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty); |
507 | extern int tty_port_carrier_raised(struct tty_port *port); |
508 | extern void tty_port_raise_dtr_rts(struct tty_port *port); |
509 | extern void tty_port_lower_dtr_rts(struct tty_port *port); |
510 | extern void tty_port_hangup(struct tty_port *port); |
511 | extern int tty_port_block_til_ready(struct tty_port *port, |
512 | struct tty_struct *tty, struct file *filp); |
513 | extern int tty_port_close_start(struct tty_port *port, |
514 | struct tty_struct *tty, struct file *filp); |
515 | extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty); |
516 | extern void tty_port_close(struct tty_port *port, |
517 | struct tty_struct *tty, struct file *filp); |
518 | extern int tty_port_open(struct tty_port *port, |
519 | struct tty_struct *tty, struct file *filp); |
520 | static inline int tty_port_users(struct tty_port *port) |
521 | { |
522 | return port->count + port->blocked_open; |
523 | } |
524 | |
525 | extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc); |
526 | extern int tty_unregister_ldisc(int disc); |
527 | extern int tty_set_ldisc(struct tty_struct *tty, int ldisc); |
528 | extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty); |
529 | extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty); |
530 | extern void tty_ldisc_init(struct tty_struct *tty); |
531 | extern void tty_ldisc_deinit(struct tty_struct *tty); |
532 | extern void tty_ldisc_begin(void); |
533 | /* This last one is just for the tty layer internals and shouldn't be used elsewhere */ |
534 | extern void tty_ldisc_enable(struct tty_struct *tty); |
535 | |
536 | |
537 | /* n_tty.c */ |
538 | extern struct tty_ldisc_ops tty_ldisc_N_TTY; |
539 | extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops); |
540 | |
541 | /* tty_audit.c */ |
542 | #ifdef CONFIG_AUDIT |
543 | extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data, |
544 | size_t size); |
545 | extern void tty_audit_exit(void); |
546 | extern void tty_audit_fork(struct signal_struct *sig); |
547 | extern void tty_audit_tiocsti(struct tty_struct *tty, char ch); |
548 | extern void tty_audit_push(struct tty_struct *tty); |
549 | extern int tty_audit_push_task(struct task_struct *tsk, |
550 | uid_t loginuid, u32 sessionid); |
551 | #else |
552 | static inline void tty_audit_add_data(struct tty_struct *tty, |
553 | unsigned char *data, size_t size) |
554 | { |
555 | } |
556 | static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch) |
557 | { |
558 | } |
559 | static inline void tty_audit_exit(void) |
560 | { |
561 | } |
562 | static inline void tty_audit_fork(struct signal_struct *sig) |
563 | { |
564 | } |
565 | static inline void tty_audit_push(struct tty_struct *tty) |
566 | { |
567 | } |
568 | static inline int tty_audit_push_task(struct task_struct *tsk, |
569 | uid_t loginuid, u32 sessionid) |
570 | { |
571 | return 0; |
572 | } |
573 | #endif |
574 | |
575 | /* tty_io.c */ |
576 | extern int __init tty_init(void); |
577 | |
578 | /* tty_ioctl.c */ |
579 | extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file, |
580 | unsigned int cmd, unsigned long arg); |
581 | |
582 | /* serial.c */ |
583 | |
584 | extern void serial_console_init(void); |
585 | |
586 | /* pcxx.c */ |
587 | |
588 | extern int pcxe_open(struct tty_struct *tty, struct file *filp); |
589 | |
590 | /* vt.c */ |
591 | |
592 | extern int vt_ioctl(struct tty_struct *tty, |
593 | unsigned int cmd, unsigned long arg); |
594 | |
595 | extern long vt_compat_ioctl(struct tty_struct *tty, |
596 | unsigned int cmd, unsigned long arg); |
597 | |
598 | /* tty_mutex.c */ |
599 | /* functions for preparation of BKL removal */ |
600 | extern void __lockfunc tty_lock(void) __acquires(tty_lock); |
601 | extern void __lockfunc tty_unlock(void) __releases(tty_lock); |
602 | extern struct task_struct *__big_tty_mutex_owner; |
603 | #define tty_locked() (current == __big_tty_mutex_owner) |
604 | |
605 | /* |
606 | * wait_event_interruptible_tty -- wait for a condition with the tty lock held |
607 | * |
608 | * The condition we are waiting for might take a long time to |
609 | * become true, or might depend on another thread taking the |
610 | * BTM. In either case, we need to drop the BTM to guarantee |
611 | * forward progress. This is a leftover from the conversion |
612 | * from the BKL and should eventually get removed as the BTM |
613 | * falls out of use. |
614 | * |
615 | * Do not use in new code. |
616 | */ |
617 | #define wait_event_interruptible_tty(wq, condition) \ |
618 | ({ \ |
619 | int __ret = 0; \ |
620 | if (!(condition)) { \ |
621 | __wait_event_interruptible_tty(wq, condition, __ret); \ |
622 | } \ |
623 | __ret; \ |
624 | }) |
625 | |
626 | #define __wait_event_interruptible_tty(wq, condition, ret) \ |
627 | do { \ |
628 | DEFINE_WAIT(__wait); \ |
629 | \ |
630 | for (;;) { \ |
631 | prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE); \ |
632 | if (condition) \ |
633 | break; \ |
634 | if (!signal_pending(current)) { \ |
635 | tty_unlock(); \ |
636 | schedule(); \ |
637 | tty_lock(); \ |
638 | continue; \ |
639 | } \ |
640 | ret = -ERESTARTSYS; \ |
641 | break; \ |
642 | } \ |
643 | finish_wait(&wq, &__wait); \ |
644 | } while (0) |
645 | |
646 | |
647 | #endif /* __KERNEL__ */ |
648 | #endif |
649 |
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