258 	if (!tty || !tty->driver)  in tty_driver_name()
260 	return tty->driver->name;  in tty_driver_name()
293 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in check_tty_count()
294 	    tty->driver->subtype == PTY_TYPE_SLAVE &&  in check_tty_count()
1116 static void pty_line_name(struct tty_driver *driver, int index, char *p)  in pty_line_name()  argument
1118 	int i = index + driver->name_base;  in pty_line_name()
1121 		driver->subtype == PTY_TYPE_SLAVE ? "tty" : driver->name,  in pty_line_name()
1136 static ssize_t tty_line_name(struct tty_driver *driver, int index, char *p)  in tty_line_name()  argument
1138 	if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE)  in tty_line_name()
1139 		return sprintf(p, "%s", driver->name);  in tty_line_name()
1141 		return sprintf(p, "%s%d", driver->name,  in tty_line_name()
1142 			       index + driver->name_base);  in tty_line_name()
1155 static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,  in tty_driver_lookup_tty()  argument
1160 	if (driver->ops->lookup)  in tty_driver_lookup_tty()
1164 			tty = driver->ops->lookup(driver, file, idx);  in tty_driver_lookup_tty()
1166 		tty = driver->ttys[idx];  in tty_driver_lookup_tty()
1186 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_init_termios()
1187 		tty->termios = tty->driver->init_termios;  in tty_init_termios()
1190 		tp = tty->driver->termios[idx];  in tty_init_termios()
1193 			tty->termios.c_line  = tty->driver->init_termios.c_line;  in tty_init_termios()
1195 			tty->termios = tty->driver->init_termios;  in tty_init_termios()
1203 int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty)  in tty_standard_install()  argument
1206 	tty_driver_kref_get(driver);  in tty_standard_install()
1208 	driver->ttys[tty->index] = tty;  in tty_standard_install()
1225 static int tty_driver_install_tty(struct tty_driver *driver,  in tty_driver_install_tty()  argument
1228 	return driver->ops->install ? driver->ops->install(driver, tty) :  in tty_driver_install_tty()
1229 		tty_standard_install(driver, tty);  in tty_driver_install_tty()
1242 static void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *tty)  in tty_driver_remove_tty()  argument
1244 	if (driver->ops->remove)  in tty_driver_remove_tty()
1245 		driver->ops->remove(driver, tty);  in tty_driver_remove_tty()
1247 		driver->ttys[tty->index] = NULL;  in tty_driver_remove_tty()
1261 	struct tty_driver *driver = tty->driver;  in tty_reopen()  local
1265 	if (driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_reopen()
1266 	    driver->subtype == PTY_TYPE_MASTER)  in tty_reopen()
1319 struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)  in tty_init_dev()  argument
1332 	if (!try_module_get(driver->owner))  in tty_init_dev()
1335 	tty = alloc_tty_struct(driver, idx);  in tty_init_dev()
1342 	retval = tty_driver_install_tty(driver, tty);  in tty_init_dev()
1347 		tty->port = driver->ports[idx];  in tty_init_dev()
1351 			__func__, tty->driver->name)) {  in tty_init_dev()
1377 	module_put(driver->owner);  in tty_init_dev()
1403 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_save_termios()
1407 	tp = tty->driver->termios[idx];  in tty_save_termios()
1412 		tty->driver->termios[idx] = tp;  in tty_save_termios()
1453 	struct tty_driver *driver = tty->driver;  in release_one_tty()  local
1454 	struct module *owner = driver->owner;  in release_one_tty()
1460 	tty_driver_kref_put(driver);  in release_one_tty()
1517 	tty_driver_remove_tty(tty->driver, tty);  in release_tty()
1542 	if (idx < 0 || idx >= tty->driver->num) {  in tty_release_checks()
1548 	if (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)  in tty_release_checks()
1551 	if (tty != tty->driver->ttys[idx]) {  in tty_release_checks()
1553 			  idx, tty->driver->ttys[idx]);  in tty_release_checks()
1556 	if (tty->driver->other) {  in tty_release_checks()
1559 		if (o_tty != tty->driver->other->ttys[idx]) {  in tty_release_checks()
1561 				  idx, tty->driver->other->ttys[idx]);  in tty_release_checks()
1669 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_release()
1670 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_release()
1842 	struct tty_driver *driver = NULL;  in tty_lookup_driver()  local
1848 		driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
1856 			driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
1857 			if (driver && filp) {  in tty_lookup_driver()
1863 		if (driver)  in tty_lookup_driver()
1864 			tty_driver_kref_put(driver);  in tty_lookup_driver()
1868 		driver = get_tty_driver(device, index);  in tty_lookup_driver()
1869 		if (!driver)  in tty_lookup_driver()
1873 	return driver;  in tty_lookup_driver()
1894 	struct tty_driver *driver;  in tty_kopen()  local
1898 	driver = tty_lookup_driver(device, NULL, &index);  in tty_kopen()
1899 	if (IS_ERR(driver)) {  in tty_kopen()
1901 		return ERR_CAST(driver);  in tty_kopen()
1905 	tty = tty_driver_lookup_tty(driver, NULL, index);  in tty_kopen()
1914 		tty = tty_init_dev(driver, index);  in tty_kopen()
1921 	tty_driver_kref_put(driver);  in tty_kopen()
1945 	struct tty_driver *driver = NULL;  in tty_open_by_driver()  local
1950 	driver = tty_lookup_driver(device, filp, &index);  in tty_open_by_driver()
1951 	if (IS_ERR(driver)) {  in tty_open_by_driver()
1953 		return ERR_CAST(driver);  in tty_open_by_driver()
1957 	tty = tty_driver_lookup_tty(driver, filp, index);  in tty_open_by_driver()
1985 		tty = tty_init_dev(driver, index);  in tty_open_by_driver()
1989 	tty_driver_kref_put(driver);  in tty_open_by_driver()
2079 		 (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_open()
2080 		  tty->driver->subtype == PTY_TYPE_MASTER);  in tty_open()
2383 	if (tty->driver->flags & TTY_DRIVER_HARDWARE_BREAK)  in send_break()
2525 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_pair_get_tty()
2526 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_pair_get_tty()
2981 struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx)  in alloc_tty_struct()  argument
3012 	tty->driver = driver;  in alloc_tty_struct()
3013 	tty->ops = driver->ops;  in alloc_tty_struct()
3015 	tty_line_name(driver, idx, tty->name);  in alloc_tty_struct()
3043 static int tty_cdev_add(struct tty_driver *driver, dev_t dev,  in tty_cdev_add()  argument
3049 	driver->cdevs[index] = cdev_alloc();  in tty_cdev_add()
3050 	if (!driver->cdevs[index])  in tty_cdev_add()
3052 	driver->cdevs[index]->ops = &tty_fops;  in tty_cdev_add()
3053 	driver->cdevs[index]->owner = driver->owner;  in tty_cdev_add()
3054 	err = cdev_add(driver->cdevs[index], dev, count);  in tty_cdev_add()
3056 		kobject_put(&driver->cdevs[index]->kobj);  in tty_cdev_add()
3079 struct device *tty_register_device(struct tty_driver *driver, unsigned index,  in tty_register_device()  argument
3082 	return tty_register_device_attr(driver, index, device, NULL, NULL);  in tty_register_device()
3112 struct device *tty_register_device_attr(struct tty_driver *driver,  in tty_register_device_attr()  argument
3118 	dev_t devt = MKDEV(driver->major, driver->minor_start) + index;  in tty_register_device_attr()
3123 	if (index >= driver->num) {  in tty_register_device_attr()
3125 		       driver->name, index);  in tty_register_device_attr()
3129 	if (driver->type == TTY_DRIVER_TYPE_PTY)  in tty_register_device_attr()
3130 		pty_line_name(driver, index, name);  in tty_register_device_attr()
3132 		tty_line_name(driver, index, name);  in tty_register_device_attr()
3152 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_register_device_attr()
3157 		tp = driver->termios[index];  in tty_register_device_attr()
3159 			driver->termios[index] = NULL;  in tty_register_device_attr()
3163 		retval = tty_cdev_add(driver, devt, index, 1);  in tty_register_device_attr()
3193 void tty_unregister_device(struct tty_driver *driver, unsigned index)  in tty_unregister_device()  argument
3196 		MKDEV(driver->major, driver->minor_start) + index);  in tty_unregister_device()
3197 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_unregister_device()
3198 		cdev_del(driver->cdevs[index]);  in tty_unregister_device()
3199 		driver->cdevs[index] = NULL;  in tty_unregister_device()
3216 	struct tty_driver *driver;  in __tty_alloc_driver()  local
3223 	driver = kzalloc(sizeof(*driver), GFP_KERNEL);  in __tty_alloc_driver()
3224 	if (!driver)  in __tty_alloc_driver()
3227 	kref_init(&driver->kref);  in __tty_alloc_driver()
3228 	driver->magic = TTY_DRIVER_MAGIC;  in __tty_alloc_driver()
3229 	driver->num = lines;  in __tty_alloc_driver()
3230 	driver->owner = owner;  in __tty_alloc_driver()
3231 	driver->flags = flags;  in __tty_alloc_driver()
3234 		driver->ttys = kcalloc(lines, sizeof(*driver->ttys),  in __tty_alloc_driver()
3236 		driver->termios = kcalloc(lines, sizeof(*driver->termios),  in __tty_alloc_driver()
3238 		if (!driver->ttys || !driver->termios) {  in __tty_alloc_driver()
3245 		driver->ports = kcalloc(lines, sizeof(*driver->ports),  in __tty_alloc_driver()
3247 		if (!driver->ports) {  in __tty_alloc_driver()
3254 	driver->cdevs = kcalloc(cdevs, sizeof(*driver->cdevs), GFP_KERNEL);  in __tty_alloc_driver()
3255 	if (!driver->cdevs) {  in __tty_alloc_driver()
3260 	return driver;  in __tty_alloc_driver()
3262 	kfree(driver->ports);  in __tty_alloc_driver()
3263 	kfree(driver->ttys);  in __tty_alloc_driver()
3264 	kfree(driver->termios);  in __tty_alloc_driver()
3265 	kfree(driver->cdevs);  in __tty_alloc_driver()
3266 	kfree(driver);  in __tty_alloc_driver()
3273 	struct tty_driver *driver = container_of(kref, struct tty_driver, kref);  in destruct_tty_driver()  local
3277 	if (driver->flags & TTY_DRIVER_INSTALLED) {  in destruct_tty_driver()
3278 		for (i = 0; i < driver->num; i++) {  in destruct_tty_driver()
3279 			tp = driver->termios[i];  in destruct_tty_driver()
3281 				driver->termios[i] = NULL;  in destruct_tty_driver()
3284 			if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))  in destruct_tty_driver()
3285 				tty_unregister_device(driver, i);  in destruct_tty_driver()
3287 		proc_tty_unregister_driver(driver);  in destruct_tty_driver()
3288 		if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)  in destruct_tty_driver()
3289 			cdev_del(driver->cdevs[0]);  in destruct_tty_driver()
3291 	kfree(driver->cdevs);  in destruct_tty_driver()
3292 	kfree(driver->ports);  in destruct_tty_driver()
3293 	kfree(driver->termios);  in destruct_tty_driver()
3294 	kfree(driver->ttys);  in destruct_tty_driver()
3295 	kfree(driver);  in destruct_tty_driver()
3298 void tty_driver_kref_put(struct tty_driver *driver)  in tty_driver_kref_put()  argument
3300 	kref_put(&driver->kref, destruct_tty_driver);  in tty_driver_kref_put()
3304 void tty_set_operations(struct tty_driver *driver,  in tty_set_operations()  argument
3307 	driver->ops = op;  in tty_set_operations()
3320 int tty_register_driver(struct tty_driver *driver)  in tty_register_driver()  argument
3327 	if (!driver->major) {  in tty_register_driver()
3328 		error = alloc_chrdev_region(&dev, driver->minor_start,  in tty_register_driver()
3329 						driver->num, driver->name);  in tty_register_driver()
3331 			driver->major = MAJOR(dev);  in tty_register_driver()
3332 			driver->minor_start = MINOR(dev);  in tty_register_driver()
3335 		dev = MKDEV(driver->major, driver->minor_start);  in tty_register_driver()
3336 		error = register_chrdev_region(dev, driver->num, driver->name);  in tty_register_driver()
3341 	if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC) {  in tty_register_driver()
3342 		error = tty_cdev_add(driver, dev, 0, driver->num);  in tty_register_driver()
3348 	list_add(&driver->tty_drivers, &tty_drivers);  in tty_register_driver()
3351 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV)) {  in tty_register_driver()
3352 		for (i = 0; i < driver->num; i++) {  in tty_register_driver()
3353 			d = tty_register_device(driver, i, NULL);  in tty_register_driver()
3360 	proc_tty_register_driver(driver);  in tty_register_driver()
3361 	driver->flags |= TTY_DRIVER_INSTALLED;  in tty_register_driver()
3366 		tty_unregister_device(driver, i);  in tty_register_driver()
3369 	list_del(&driver->tty_drivers);  in tty_register_driver()
3373 	unregister_chrdev_region(dev, driver->num);  in tty_register_driver()
3382 int tty_unregister_driver(struct tty_driver *driver)  in tty_unregister_driver()  argument
3386 	if (driver->refcount)  in tty_unregister_driver()
3389 	unregister_chrdev_region(MKDEV(driver->major, driver->minor_start),  in tty_unregister_driver()
3390 				driver->num);  in tty_unregister_driver()
3392 	list_del(&driver->tty_drivers);  in tty_unregister_driver()
3401 	return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;  in tty_devnum()