drivers/tty/tty.h

File Facts

System

Linux kernel

Corpus path

drivers/tty/tty.h

Extension

.h

Size

4464 bytes

Lines

126

Domain

Driver Families

Bucket

drivers/tty

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• enum tty_flow_change
• function __tty_set_flow_change
• function tty_set_flow_change
• function tty_audit_add_data

Annotated Snippet

void tty_default_fops(struct file_operations *fops);
struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx);
int tty_alloc_file(struct file *file);
void tty_add_file(struct tty_struct *tty, struct file *file);
void tty_free_file(struct file *file);
int tty_release(struct inode *inode, struct file *filp);

#define tty_is_writelocked(tty)  (mutex_is_locked(&tty->atomic_write_lock))

int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
void tty_ldisc_release(struct tty_struct *tty);
int __must_check tty_ldisc_init(struct tty_struct *tty);
void tty_ldisc_deinit(struct tty_struct *tty);

extern int tty_ldisc_autoload;

/* tty_audit.c */
#ifdef CONFIG_AUDIT
void tty_audit_add_data(const struct tty_struct *tty, const void *data,
			size_t size);
void tty_audit_tiocsti(const struct tty_struct *tty, u8 ch);
#else
static inline void tty_audit_add_data(const struct tty_struct *tty,
				      const void *data, size_t size)
{
}
static inline void tty_audit_tiocsti(const struct tty_struct *tty, u8 ch)
{
}
#endif

ssize_t redirected_tty_write(struct kiocb *, struct iov_iter *);

int tty_insert_flip_string_and_push_buffer(struct tty_port *port,
					   const u8 *chars, size_t cnt);

#endif

Annotation

• Detected declarations: `enum tty_flow_change`, `function __tty_set_flow_change`, `function tty_set_flow_change`, `function tty_audit_add_data`.
• Atlas domain: Driver Families / drivers/tty.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.