233 #define TTY_NUMBER(tty) ((tty)->index + (tty)->driver->name_base)
289 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in check_tty_count()
290 	    tty->driver->subtype == PTY_TYPE_SLAVE &&  in check_tty_count()
890 		if (on_exit && tty->driver->type != TTY_DRIVER_TYPE_PTY) {  in disassociate_ctty()
1248 			tty->driver->name);  in tty_write()
1323 static void pty_line_name(struct tty_driver *driver, int index, char *p)  in pty_line_name()  argument
1325 	int i = index + driver->name_base;  in pty_line_name()
1328 		driver->subtype == PTY_TYPE_SLAVE ? "tty" : driver->name,  in pty_line_name()
1343 static ssize_t tty_line_name(struct tty_driver *driver, int index, char *p)  in tty_line_name()  argument
1345 	if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE)  in tty_line_name()
1346 		return sprintf(p, "%s", driver->name);  in tty_line_name()
1348 		return sprintf(p, "%s%d", driver->name,  in tty_line_name()
1349 			       index + driver->name_base);  in tty_line_name()
1362 static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,  in tty_driver_lookup_tty()  argument
1367 	if (driver->ops->lookup)  in tty_driver_lookup_tty()
1368 		tty = driver->ops->lookup(driver, inode, idx);  in tty_driver_lookup_tty()
1370 		tty = driver->ttys[idx];  in tty_driver_lookup_tty()
1390 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_init_termios()
1391 		tty->termios = tty->driver->init_termios;  in tty_init_termios()
1394 		tp = tty->driver->termios[idx];  in tty_init_termios()
1398 			tty->termios = tty->driver->init_termios;  in tty_init_termios()
1407 int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty)  in tty_standard_install()  argument
1413 	tty_driver_kref_get(driver);  in tty_standard_install()
1415 	driver->ttys[tty->index] = tty;  in tty_standard_install()
1432 static int tty_driver_install_tty(struct tty_driver *driver,  in tty_driver_install_tty()  argument
1435 	return driver->ops->install ? driver->ops->install(driver, tty) :  in tty_driver_install_tty()
1436 		tty_standard_install(driver, tty);  in tty_driver_install_tty()
1449 void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *tty)  in tty_driver_remove_tty()  argument
1451 	if (driver->ops->remove)  in tty_driver_remove_tty()
1452 		driver->ops->remove(driver, tty);  in tty_driver_remove_tty()
1454 		driver->ttys[tty->index] = NULL;  in tty_driver_remove_tty()
1468 	struct tty_driver *driver = tty->driver;  in tty_reopen()  local
1473 	if (driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_reopen()
1474 	    driver->subtype == PTY_TYPE_MASTER)  in tty_reopen()
1511 struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)  in tty_init_dev()  argument
1524 	if (!try_module_get(driver->owner))  in tty_init_dev()
1527 	tty = alloc_tty_struct(driver, idx);  in tty_init_dev()
1534 	retval = tty_driver_install_tty(driver, tty);  in tty_init_dev()
1539 		tty->port = driver->ports[idx];  in tty_init_dev()
1543 			__func__, tty->driver->name);  in tty_init_dev()
1563 	module_put(driver->owner);  in tty_init_dev()
1581 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_free_termios()
1585 	tp = tty->driver->termios[idx];  in tty_free_termios()
1592 		tty->driver->termios[idx] = tp;  in tty_free_termios()
1633 	struct tty_driver *driver = tty->driver;  in release_one_tty()  local
1634 	struct module *owner = driver->owner;  in release_one_tty()
1640 	tty_driver_kref_put(driver);  in release_one_tty()
1697 	tty_driver_remove_tty(tty->driver, tty);  in release_tty()
1719 	if (idx < 0 || idx >= tty->driver->num) {  in tty_release_checks()
1726 	if (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)  in tty_release_checks()
1729 	if (tty != tty->driver->ttys[idx]) {  in tty_release_checks()
1734 	if (tty->driver->other) {  in tty_release_checks()
1737 		if (o_tty != tty->driver->other->ttys[idx]) {  in tty_release_checks()
1789 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_release()
1790 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_release()
1990 	struct tty_driver *driver;  in tty_lookup_driver()  local
1996 		driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
2005 			driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
2006 			if (driver) {  in tty_lookup_driver()
2016 		driver = get_tty_driver(device, index);  in tty_lookup_driver()
2017 		if (!driver)  in tty_lookup_driver()
2021 	return driver;  in tty_lookup_driver()
2052 	struct tty_driver *driver = NULL;  in tty_open()  local
2071 		driver = tty_lookup_driver(device, filp, &noctty, &index);  in tty_open()
2072 		if (IS_ERR(driver)) {  in tty_open()
2073 			retval = PTR_ERR(driver);  in tty_open()
2078 		tty = tty_driver_lookup_tty(driver, inode, index);  in tty_open()
2095 			tty = tty_init_dev(driver, index);  in tty_open()
2099 		tty_driver_kref_put(driver);  in tty_open()
2110 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_open()
2111 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_open()
2176 	if (!IS_ERR_OR_NULL(driver))  in tty_open()
2177 		tty_driver_kref_put(driver);  in tty_open()
2714 	if (tty->driver->flags & TTY_DRIVER_HARDWARE_BREAK)  in send_break()
2839 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_pair_get_tty()
2840 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_pair_get_tty()
3144 struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx)  in alloc_tty_struct()  argument
3171 	tty->driver = driver;  in alloc_tty_struct()
3172 	tty->ops = driver->ops;  in alloc_tty_struct()
3174 	tty_line_name(driver, idx, tty->name);  in alloc_tty_struct()
3216 static int tty_cdev_add(struct tty_driver *driver, dev_t dev,  in tty_cdev_add()  argument
3220 	cdev_init(&driver->cdevs[index], &tty_fops);  in tty_cdev_add()
3221 	driver->cdevs[index].owner = driver->owner;  in tty_cdev_add()
3222 	return cdev_add(&driver->cdevs[index], dev, count);  in tty_cdev_add()
3244 struct device *tty_register_device(struct tty_driver *driver, unsigned index,  in tty_register_device()  argument
3247 	return tty_register_device_attr(driver, index, device, NULL, NULL);  in tty_register_device()
3277 struct device *tty_register_device_attr(struct tty_driver *driver,  in tty_register_device_attr()  argument
3283 	dev_t devt = MKDEV(driver->major, driver->minor_start) + index;  in tty_register_device_attr()
3288 	if (index >= driver->num) {  in tty_register_device_attr()
3294 	if (driver->type == TTY_DRIVER_TYPE_PTY)  in tty_register_device_attr()
3295 		pty_line_name(driver, index, name);  in tty_register_device_attr()
3297 		tty_line_name(driver, index, name);  in tty_register_device_attr()
3299 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_register_device_attr()
3300 		retval = tty_cdev_add(driver, devt, index, 1);  in tty_register_device_attr()
3329 		cdev_del(&driver->cdevs[index]);  in tty_register_device_attr()
3345 void tty_unregister_device(struct tty_driver *driver, unsigned index)  in tty_unregister_device()  argument
3348 		MKDEV(driver->major, driver->minor_start) + index);  in tty_unregister_device()
3349 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC))  in tty_unregister_device()
3350 		cdev_del(&driver->cdevs[index]);  in tty_unregister_device()
3366 	struct tty_driver *driver;  in __tty_alloc_driver()  local
3373 	driver = kzalloc(sizeof(struct tty_driver), GFP_KERNEL);  in __tty_alloc_driver()
3374 	if (!driver)  in __tty_alloc_driver()
3377 	kref_init(&driver->kref);  in __tty_alloc_driver()
3378 	driver->magic = TTY_DRIVER_MAGIC;  in __tty_alloc_driver()
3379 	driver->num = lines;  in __tty_alloc_driver()
3380 	driver->owner = owner;  in __tty_alloc_driver()
3381 	driver->flags = flags;  in __tty_alloc_driver()
3384 		driver->ttys = kcalloc(lines, sizeof(*driver->ttys),  in __tty_alloc_driver()
3386 		driver->termios = kcalloc(lines, sizeof(*driver->termios),  in __tty_alloc_driver()
3388 		if (!driver->ttys || !driver->termios) {  in __tty_alloc_driver()
3395 		driver->ports = kcalloc(lines, sizeof(*driver->ports),  in __tty_alloc_driver()
3397 		if (!driver->ports) {  in __tty_alloc_driver()
3404 	driver->cdevs = kcalloc(cdevs, sizeof(*driver->cdevs), GFP_KERNEL);  in __tty_alloc_driver()
3405 	if (!driver->cdevs) {  in __tty_alloc_driver()
3410 	return driver;  in __tty_alloc_driver()
3412 	kfree(driver->ports);  in __tty_alloc_driver()
3413 	kfree(driver->ttys);  in __tty_alloc_driver()
3414 	kfree(driver->termios);  in __tty_alloc_driver()
3415 	kfree(driver);  in __tty_alloc_driver()
3422 	struct tty_driver *driver = container_of(kref, struct tty_driver, kref);  in destruct_tty_driver()  local
3426 	if (driver->flags & TTY_DRIVER_INSTALLED) {  in destruct_tty_driver()
3432 		for (i = 0; i < driver->num; i++) {  in destruct_tty_driver()
3433 			tp = driver->termios[i];  in destruct_tty_driver()
3435 				driver->termios[i] = NULL;  in destruct_tty_driver()
3438 			if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))  in destruct_tty_driver()
3439 				tty_unregister_device(driver, i);  in destruct_tty_driver()
3441 		proc_tty_unregister_driver(driver);  in destruct_tty_driver()
3442 		if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)  in destruct_tty_driver()
3443 			cdev_del(&driver->cdevs[0]);  in destruct_tty_driver()
3445 	kfree(driver->cdevs);  in destruct_tty_driver()
3446 	kfree(driver->ports);  in destruct_tty_driver()
3447 	kfree(driver->termios);  in destruct_tty_driver()
3448 	kfree(driver->ttys);  in destruct_tty_driver()
3449 	kfree(driver);  in destruct_tty_driver()
3452 void tty_driver_kref_put(struct tty_driver *driver)  in tty_driver_kref_put()  argument
3454 	kref_put(&driver->kref, destruct_tty_driver);  in tty_driver_kref_put()
3458 void tty_set_operations(struct tty_driver *driver,  in tty_set_operations()  argument
3461 	driver->ops = op;  in tty_set_operations()
3474 int tty_register_driver(struct tty_driver *driver)  in tty_register_driver()  argument
3481 	if (!driver->major) {  in tty_register_driver()
3482 		error = alloc_chrdev_region(&dev, driver->minor_start,  in tty_register_driver()
3483 						driver->num, driver->name);  in tty_register_driver()
3485 			driver->major = MAJOR(dev);  in tty_register_driver()
3486 			driver->minor_start = MINOR(dev);  in tty_register_driver()
3489 		dev = MKDEV(driver->major, driver->minor_start);  in tty_register_driver()
3490 		error = register_chrdev_region(dev, driver->num, driver->name);  in tty_register_driver()
3495 	if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC) {  in tty_register_driver()
3496 		error = tty_cdev_add(driver, dev, 0, driver->num);  in tty_register_driver()
3502 	list_add(&driver->tty_drivers, &tty_drivers);  in tty_register_driver()
3505 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV)) {  in tty_register_driver()
3506 		for (i = 0; i < driver->num; i++) {  in tty_register_driver()
3507 			d = tty_register_device(driver, i, NULL);  in tty_register_driver()
3514 	proc_tty_register_driver(driver);  in tty_register_driver()
3515 	driver->flags |= TTY_DRIVER_INSTALLED;  in tty_register_driver()
3520 		tty_unregister_device(driver, i);  in tty_register_driver()
3523 	list_del(&driver->tty_drivers);  in tty_register_driver()
3527 	unregister_chrdev_region(dev, driver->num);  in tty_register_driver()
3536 int tty_unregister_driver(struct tty_driver *driver)  in tty_unregister_driver()  argument
3540 	if (driver->refcount)  in tty_unregister_driver()
3543 	unregister_chrdev_region(MKDEV(driver->major, driver->minor_start),  in tty_unregister_driver()
3544 				driver->num);  in tty_unregister_driver()
3546 	list_del(&driver->tty_drivers);  in tty_unregister_driver()
3555 	return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;  in tty_devnum()