tty_chars_in_buffer identifier - Linux source code next-20260811

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linux

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FIXME
- FIXME
  - next-20260811

Documented in 1 files:

drivers/tty/tty_ioctl.c, line 41

Defined in 1 files as a prototype:

include/linux/tty.h, line 409 (as a prototype)

Defined in 1 files as a function:

drivers/tty/tty_ioctl.c, line 48 (as a function)

Referenced in 5 files:

Smatch caller information:

drivers/tty/vt/keyboard.c kbd_keycode() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->driver_data	1-u64max
BUF_SIZE	0	tty	(-1),1-s32max
BUF_SIZE	0	tty	(-1),1-s32max
DATA_SOURCE	0	tty	r tty_port_tty_get
BIT_INFO	0	tty->termios.c_lflag	0x0,0xfffffff7
RX_PATH
TASK_NOT_RUNNING
LOCK2		&dev->event_lock
LOCK2		global &kbd_event_lock
LOCK2		irq
LOCK2		rcu_read
TYPE_LOCK		(struct input_dev)->event_lock

drivers/tty/n_hdlc.c n_hdlc_tty_ioctl() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.dep_map->name	0-255
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->prev	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->chars_in_buffer	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->compat_ioctl	0,1607379221601308672,5008286898947497984,6364353445524312064
PARAM_VALUE	0	tty->ops->ioctl	0,4096-ptr_max
CAPPED_DATA	0	tty	1
DATA_SOURCE	0	tty	$0
LOCK2	0	&tty->ldisc_sem
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/tty_ioctl.c set_termios() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->driver	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.dep_map->name	0-255
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->list.next	2212933610777083904
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->list.prev	2212933610777083904
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.dep_map->name	0-255
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.owner	(-1)
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.owner_cpu	u32max
CAPPED_DATA	0	&tty->termios_rwsem	1
DATA_SOURCE	0	tty	$0
LOCK2		&tty->ldisc_sem
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/tty_ioctl.c set_termios() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->driver	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->chars_in_buffer	1-u64max
PARAM_VALUE	0	tty->termios_rwsem.dep_map->name	0-255
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->list.next	2212933610777083904
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->list.prev	2212933610777083904
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.dep_map->name	0-255
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.owner	(-1)
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.owner_cpu	u32max
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
CAPPED_DATA	0	&tty->termios_rwsem	1
DATA_SOURCE	0	tty	$0
TASK_NOT_RUNNING
LOCK2		&tty->ldisc_sem
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/tty_ioctl.c set_termios() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->driver	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->chars_in_buffer	1-u64max
PARAM_VALUE	0	tty->termios_rwsem.dep_map->name	0-255
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->list.next	2212933610777083904
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->list.prev	2212933610777083904
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.dep_map->name	0-255
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.owner	(-1)
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.owner_cpu	u32max
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
CAPPED_DATA	0	&tty->termios_rwsem	1
DATA_SOURCE	0	tty	$0
TASK_NOT_RUNNING
LOCK2		&tty->ldisc_sem
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/tty_ioctl.c set_termios() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->driver	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.dep_map->name	0-255
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->list.next	2212933610777083904
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->list.prev	2212933610777083904
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.dep_map->name	0-255
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.owner	(-1)
PARAM_VALUE	0	tty->termios_rwsem.wait_lock.owner_cpu	u32max
CAPPED_DATA	0	&tty->termios_rwsem	1
DATA_SOURCE	0	tty	$0
LOCK2		&tty->ldisc_sem
LOCK2	0	&tty->atomic_write_lock
TYPE_LOCK		(struct tty_struct)->atomic_write_lock
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/tty_ioctl.c tty_wait_until_sent() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty->link->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->link->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->ops->close	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->ldisc_ok	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->lookup	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->open	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->set_ldisc	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->set_termios	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->write	0,4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
BUF_SIZE	0	tty	s32min,(-1),1-s32max
BUF_SIZE	0	tty	s32min,(-1),1-s32max
DATA_SOURCE	0	tty	$0
RX_PATH
TASK_NOT_RUNNING
HALF_LOCKED2	0	&tty->driver_data->d_lockref.lock
HALF_LOCKED2	0	&tty->legacy_mutex

drivers/tty/tty_ioctl.c tty_wait_until_sent() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->driver_data->port_lock.rlock.dep_map->name	0-255
PARAM_VALUE	0	tty->driver_data->refcount.counter	0-s32max
PARAM_VALUE	0	tty->driver_data->write_lock.rlock.dep_map->name	0-255
PARAM_VALUE	0	tty->link->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->link->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->chars_in_buffer	1-u64max
PARAM_VALUE	0	tty->ops->close	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->ldisc_ok	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->lookup	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->open	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->set_ldisc	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->set_termios	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->write	0,4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
BUF_SIZE	0	tty	s32min,(-1),1-s32max
BUF_SIZE	0	tty	s32min,(-1),1-s32max
DATA_SOURCE	0	tty	$0
RX_PATH
TASK_NOT_RUNNING
HALF_LOCKED2	0	&tty->driver_data->d_lockref.lock
HALF_LOCKED2	0	&tty->legacy_mutex

drivers/tty/tty_ioctl.c tty_wait_until_sent() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->driver_data->port_lock.rlock.dep_map->name	0-255
PARAM_VALUE	0	tty->driver_data->refcount.counter	0-s32max
PARAM_VALUE	0	tty->driver_data->write_lock.rlock.dep_map->name	0-255
PARAM_VALUE	0	tty->link->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->link->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->chars_in_buffer	1-u64max
PARAM_VALUE	0	tty->ops->close	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->ldisc_ok	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->lookup	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->open	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->set_ldisc	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->set_termios	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->write	0,4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
BUF_SIZE	0	tty	s32min,(-1),1-s32max
BUF_SIZE	0	tty	s32min,(-1),1-s32max
DATA_SOURCE	0	tty	$0
RX_PATH
TASK_NOT_RUNNING
HALF_LOCKED2	0	&tty->driver_data->d_lockref.lock
HALF_LOCKED2	0	&tty->legacy_mutex

drivers/net/slip/slip.c sl_tx_timeout() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	1-u64max
PREEMPT_ADD			<- disables preempt
TASK_NOT_RUNNING
LOCK2		&sl->lock
HALF_LOCKED2		&dev->tx_global_lock
TYPE_LOCK		(struct slip)->lock

drivers/tty/n_tty.c n_tty_ioctl() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.dep_map->name	0-255
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->prev	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->chars_in_buffer	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->compat_ioctl	0,1607379221601308672,5008286898947497984,6364353445524312064
PARAM_VALUE	0	tty->ops->ioctl	0,4096-ptr_max
CAPPED_DATA	0	tty	1
DATA_SOURCE	0	tty	$0
LOCK2	0	&tty->ldisc_sem
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/n_tty.c n_tty_poll() -> tty_chars_in_buffer()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->disc_data	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.dep_map->name	0-255
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->prev	4096-ptr_max
PARAM_VALUE	0	tty->link	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->write	4096-ptr_max
PARAM_VALUE	0	tty->port->buf.work.lockdep_map->name	0-255
PARAM_VALUE	0	tty->read_wait.head.next->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.next->prev	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.lock.rlock.dep_map->name	0-255
PARAM_VALUE	0	tty->write_wait.head.next->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.next->prev	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
DATA_SOURCE	0	tty	$0
RX_PATH
TASK_NOT_RUNNING
LOCK2	0	&tty->ldisc_sem
HALF_LOCKED2		&kvm->irq_srcu
HALF_LOCKED2		&of->mutex
HALF_LOCKED2		&vm->irqfds_lock
HALF_LOCKED2		global &irqfds_srcu
TYPE_LOCK		(struct tty_struct)->ldisc_sem