238 #define TTY_NUMBER(tty) ((tty)->index + (tty)->driver->name_base)
291 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in check_tty_count()
292 	    tty->driver->subtype == PTY_TYPE_SLAVE &&  in check_tty_count()
891 		if (on_exit && tty->driver->type != TTY_DRIVER_TYPE_PTY) {  in disassociate_ctty()
1243 			tty->driver->name);  in tty_write()
1318 static void pty_line_name(struct tty_driver *driver, int index, char *p)  in pty_line_name()  argument
1320 	int i = index + driver->name_base;  in pty_line_name()
1323 		driver->subtype == PTY_TYPE_SLAVE ? "tty" : driver->name,  in pty_line_name()
1338 static ssize_t tty_line_name(struct tty_driver *driver, int index, char *p)  in tty_line_name()  argument
1340 	if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE)  in tty_line_name()
1341 		return sprintf(p, "%s", driver->name);  in tty_line_name()
1343 		return sprintf(p, "%s%d", driver->name,  in tty_line_name()
1344 			       index + driver->name_base);  in tty_line_name()
1357 static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,  in tty_driver_lookup_tty()  argument
1362 	if (driver->ops->lookup)  in tty_driver_lookup_tty()
1363 		tty = driver->ops->lookup(driver, inode, idx);  in tty_driver_lookup_tty()
1365 		tty = driver->ttys[idx];  in tty_driver_lookup_tty()
1385 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_init_termios()
1386 		tty->termios = tty->driver->init_termios;  in tty_init_termios()
1389 		tp = tty->driver->termios[idx];  in tty_init_termios()
1393 			tty->termios = tty->driver->init_termios;  in tty_init_termios()
1402 int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty)  in tty_standard_install()  argument
1408 	tty_driver_kref_get(driver);  in tty_standard_install()
1410 	driver->ttys[tty->index] = tty;  in tty_standard_install()
1427 static int tty_driver_install_tty(struct tty_driver *driver,  in tty_driver_install_tty()  argument
1430 	return driver->ops->install ? driver->ops->install(driver, tty) :  in tty_driver_install_tty()
1431 		tty_standard_install(driver, tty);  in tty_driver_install_tty()
1444 void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *tty)  in tty_driver_remove_tty()  argument
1446 	if (driver->ops->remove)  in tty_driver_remove_tty()
1447 		driver->ops->remove(driver, tty);  in tty_driver_remove_tty()
1449 		driver->ttys[tty->index] = NULL;  in tty_driver_remove_tty()
1463 	struct tty_driver *driver = tty->driver;  in tty_reopen()  local
1465 	if (driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_reopen()
1466 	    driver->subtype == PTY_TYPE_MASTER)  in tty_reopen()
1506 struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)  in tty_init_dev()  argument
1519 	if (!try_module_get(driver->owner))  in tty_init_dev()
1522 	tty = alloc_tty_struct(driver, idx);  in tty_init_dev()
1529 	retval = tty_driver_install_tty(driver, tty);  in tty_init_dev()
1534 		tty->port = driver->ports[idx];  in tty_init_dev()
1538 			__func__, tty->driver->name);  in tty_init_dev()
1558 	module_put(driver->owner);  in tty_init_dev()
1576 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_free_termios()
1580 	tp = tty->driver->termios[idx];  in tty_free_termios()
1587 		tty->driver->termios[idx] = tp;  in tty_free_termios()
1628 	struct tty_driver *driver = tty->driver;  in release_one_tty()  local
1629 	struct module *owner = driver->owner;  in release_one_tty()
1635 	tty_driver_kref_put(driver);  in release_one_tty()
1692 	tty_driver_remove_tty(tty->driver, tty);  in release_tty()
1714 	if (idx < 0 || idx >= tty->driver->num) {  in tty_release_checks()
1720 	if (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)  in tty_release_checks()
1723 	if (tty != tty->driver->ttys[idx]) {  in tty_release_checks()
1725 			  idx, tty->driver->ttys[idx]);  in tty_release_checks()
1728 	if (tty->driver->other) {  in tty_release_checks()
1731 		if (o_tty != tty->driver->other->ttys[idx]) {  in tty_release_checks()
1733 				  idx, tty->driver->other->ttys[idx]);  in tty_release_checks()
1782 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_release()
1783 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_release()
1976 	struct tty_driver *driver;  in tty_lookup_driver()  local
1982 		driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
1991 			driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
1992 			if (driver) {  in tty_lookup_driver()
2002 		driver = get_tty_driver(device, index);  in tty_lookup_driver()
2003 		if (!driver)  in tty_lookup_driver()
2007 	return driver;  in tty_lookup_driver()
2038 	struct tty_driver *driver = NULL;  in tty_open()  local
2057 		driver = tty_lookup_driver(device, filp, &noctty, &index);  in tty_open()
2058 		if (IS_ERR(driver)) {  in tty_open()
2059 			retval = PTR_ERR(driver);  in tty_open()
2064 		tty = tty_driver_lookup_tty(driver, inode, index);  in tty_open()
2086 			tty = tty_init_dev(driver, index);  in tty_open()
2090 		tty_driver_kref_put(driver);  in tty_open()
2105 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_open()
2106 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_open()
2170 	if (!IS_ERR_OR_NULL(driver))  in tty_open()
2171 		tty_driver_kref_put(driver);  in tty_open()
2707 	if (tty->driver->flags & TTY_DRIVER_HARDWARE_BREAK)  in send_break()
2832 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_pair_get_tty()
2833 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_pair_get_tty()
3137 struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx)  in alloc_tty_struct()  argument
3164 	tty->driver = driver;  in alloc_tty_struct()
3165 	tty->ops = driver->ops;  in alloc_tty_struct()
3167 	tty_line_name(driver, idx, tty->name);  in alloc_tty_struct()
3209 static int tty_cdev_add(struct tty_driver *driver, dev_t dev,  in tty_cdev_add()  argument
3215 	driver->cdevs[index] = cdev_alloc();  in tty_cdev_add()
3216 	if (!driver->cdevs[index])  in tty_cdev_add()
3218 	driver->cdevs[index]->ops = &tty_fops;  in tty_cdev_add()
3219 	driver->cdevs[index]->owner = driver->owner;  in tty_cdev_add()
3220 	err = cdev_add(driver->cdevs[index], dev, count);  in tty_cdev_add()
3222 		kobject_put(&driver->cdevs[index]->kobj);  in tty_cdev_add()
3245 struct device *tty_register_device(struct tty_driver *driver, unsigned index,  in tty_register_device()  argument
3248 	return tty_register_device_attr(driver, index, device, NULL, NULL);  in tty_register_device()
3278 struct device *tty_register_device_attr(struct tty_driver *driver,  in tty_register_device_attr()  argument
3284 	dev_t devt = MKDEV(driver->major, driver->minor_start) + index;  in tty_register_device_attr()
3289 	if (index >= driver->num) {  in tty_register_device_attr()
3295 	if (driver->type == TTY_DRIVER_TYPE_PTY)  in tty_register_device_attr()
3296 		pty_line_name(driver, index, name);  in tty_register_device_attr()
3298 		tty_line_name(driver, index, name);  in tty_register_device_attr()
3300 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_register_device_attr()
3301 		retval = tty_cdev_add(driver, devt, index, 1);  in tty_register_device_attr()
3330 		cdev_del(driver->cdevs[index]);  in tty_register_device_attr()
3331 		driver->cdevs[index] = NULL;  in tty_register_device_attr()
3348 void tty_unregister_device(struct tty_driver *driver, unsigned index)  in tty_unregister_device()  argument
3351 		MKDEV(driver->major, driver->minor_start) + index);  in tty_unregister_device()
3352 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_unregister_device()
3353 		cdev_del(driver->cdevs[index]);  in tty_unregister_device()
3354 		driver->cdevs[index] = NULL;  in tty_unregister_device()
3371 	struct tty_driver *driver;  in __tty_alloc_driver()  local
3378 	driver = kzalloc(sizeof(struct tty_driver), GFP_KERNEL);  in __tty_alloc_driver()
3379 	if (!driver)  in __tty_alloc_driver()
3382 	kref_init(&driver->kref);  in __tty_alloc_driver()
3383 	driver->magic = TTY_DRIVER_MAGIC;  in __tty_alloc_driver()
3384 	driver->num = lines;  in __tty_alloc_driver()
3385 	driver->owner = owner;  in __tty_alloc_driver()
3386 	driver->flags = flags;  in __tty_alloc_driver()
3389 		driver->ttys = kcalloc(lines, sizeof(*driver->ttys),  in __tty_alloc_driver()
3391 		driver->termios = kcalloc(lines, sizeof(*driver->termios),  in __tty_alloc_driver()
3393 		if (!driver->ttys || !driver->termios) {  in __tty_alloc_driver()
3400 		driver->ports = kcalloc(lines, sizeof(*driver->ports),  in __tty_alloc_driver()
3402 		if (!driver->ports) {  in __tty_alloc_driver()
3409 	driver->cdevs = kcalloc(cdevs, sizeof(*driver->cdevs), GFP_KERNEL);  in __tty_alloc_driver()
3410 	if (!driver->cdevs) {  in __tty_alloc_driver()
3415 	return driver;  in __tty_alloc_driver()
3417 	kfree(driver->ports);  in __tty_alloc_driver()
3418 	kfree(driver->ttys);  in __tty_alloc_driver()
3419 	kfree(driver->termios);  in __tty_alloc_driver()
3420 	kfree(driver->cdevs);  in __tty_alloc_driver()
3421 	kfree(driver);  in __tty_alloc_driver()
3428 	struct tty_driver *driver = container_of(kref, struct tty_driver, kref);  in destruct_tty_driver()  local
3432 	if (driver->flags & TTY_DRIVER_INSTALLED) {  in destruct_tty_driver()
3438 		for (i = 0; i < driver->num; i++) {  in destruct_tty_driver()
3439 			tp = driver->termios[i];  in destruct_tty_driver()
3441 				driver->termios[i] = NULL;  in destruct_tty_driver()
3444 			if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))  in destruct_tty_driver()
3445 				tty_unregister_device(driver, i);  in destruct_tty_driver()
3447 		proc_tty_unregister_driver(driver);  in destruct_tty_driver()
3448 		if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)  in destruct_tty_driver()
3449 			cdev_del(driver->cdevs[0]);  in destruct_tty_driver()
3451 	kfree(driver->cdevs);  in destruct_tty_driver()
3452 	kfree(driver->ports);  in destruct_tty_driver()
3453 	kfree(driver->termios);  in destruct_tty_driver()
3454 	kfree(driver->ttys);  in destruct_tty_driver()
3455 	kfree(driver);  in destruct_tty_driver()
3458 void tty_driver_kref_put(struct tty_driver *driver)  in tty_driver_kref_put()  argument
3460 	kref_put(&driver->kref, destruct_tty_driver);  in tty_driver_kref_put()
3464 void tty_set_operations(struct tty_driver *driver,  in tty_set_operations()  argument
3467 	driver->ops = op;  in tty_set_operations()
3480 int tty_register_driver(struct tty_driver *driver)  in tty_register_driver()  argument
3487 	if (!driver->major) {  in tty_register_driver()
3488 		error = alloc_chrdev_region(&dev, driver->minor_start,  in tty_register_driver()
3489 						driver->num, driver->name);  in tty_register_driver()
3491 			driver->major = MAJOR(dev);  in tty_register_driver()
3492 			driver->minor_start = MINOR(dev);  in tty_register_driver()
3495 		dev = MKDEV(driver->major, driver->minor_start);  in tty_register_driver()
3496 		error = register_chrdev_region(dev, driver->num, driver->name);  in tty_register_driver()
3501 	if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC) {  in tty_register_driver()
3502 		error = tty_cdev_add(driver, dev, 0, driver->num);  in tty_register_driver()
3508 	list_add(&driver->tty_drivers, &tty_drivers);  in tty_register_driver()
3511 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV)) {  in tty_register_driver()
3512 		for (i = 0; i < driver->num; i++) {  in tty_register_driver()
3513 			d = tty_register_device(driver, i, NULL);  in tty_register_driver()
3520 	proc_tty_register_driver(driver);  in tty_register_driver()
3521 	driver->flags |= TTY_DRIVER_INSTALLED;  in tty_register_driver()
3526 		tty_unregister_device(driver, i);  in tty_register_driver()
3529 	list_del(&driver->tty_drivers);  in tty_register_driver()
3533 	unregister_chrdev_region(dev, driver->num);  in tty_register_driver()
3542 int tty_unregister_driver(struct tty_driver *driver)  in tty_unregister_driver()  argument
3546 	if (driver->refcount)  in tty_unregister_driver()
3549 	unregister_chrdev_region(MKDEV(driver->major, driver->minor_start),  in tty_unregister_driver()
3550 				driver->num);  in tty_unregister_driver()
3552 	list_del(&driver->tty_drivers);  in tty_unregister_driver()
3561 	return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;  in tty_devnum()