include/uapi/linux/user_events.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/user_events.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/user_events.h
Extension
.h
Size
2509 bytes
Lines
95
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct user_reg {

	/* Input: Size of the user_reg structure being used */
	__u32	size;

	/* Input: Bit in enable address to use */
	__u8	enable_bit;

	/* Input: Enable size in bytes at address */
	__u8	enable_size;

	/* Input: Flags to use, if any */
	__u16	flags;

	/* Input: Address to update when enabled */
	__u64	enable_addr;

	/* Input: Pointer to string with event name, description and flags */
	__u64	name_args;

	/* Output: Index of the event to use when writing data */
	__u32	write_index;
} __attribute__((__packed__));

/*
 * Describes an event unregister, callers must set the size, address and bit.
 * This structure is passed to the DIAG_IOCSUNREG ioctl to disable bit updates.
 */
struct user_unreg {
	/* Input: Size of the user_unreg structure being used */
	__u32	size;

	/* Input: Bit to unregister */
	__u8	disable_bit;

	/* Input: Reserved, set to 0 */
	__u8	__reserved;

	/* Input: Reserved, set to 0 */
	__u16	__reserved2;

	/* Input: Address to unregister */
	__u64	disable_addr;
} __attribute__((__packed__));

#define DIAG_IOC_MAGIC '*'

/* Request to register a user_event */
#define DIAG_IOCSREG _IOWR(DIAG_IOC_MAGIC, 0, struct user_reg *)

/* Request to delete a user_event */
#define DIAG_IOCSDEL _IOW(DIAG_IOC_MAGIC, 1, char *)

/* Requests to unregister a user_event */
#define DIAG_IOCSUNREG _IOW(DIAG_IOC_MAGIC, 2, struct user_unreg*)

#endif /* _UAPI_LINUX_USER_EVENTS_H */

Annotation

Implementation Notes