include/uapi/linux/usb/g_hid.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/usb/g_hid.h

Extension

.h

Size

1251 bytes

Lines

41

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.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct usb_hidg_report

Annotated Snippet

struct usb_hidg_report {
	__u8 report_id;
	__u8 userspace_req;
	__u16 length;
	__u8 data[MAX_REPORT_LENGTH];
	__u8 padding[4];
};

/* The 'g' code is used by gadgetfs and hid gadget ioctl requests.
 * Don't add any colliding codes to either driver, and keep
 * them in unique ranges.
 */

#define GADGET_HID_READ_GET_REPORT_ID   _IOR('g', 0x41, __u8)
#define GADGET_HID_WRITE_GET_REPORT     _IOW('g', 0x42, struct usb_hidg_report)

#endif /* __UAPI_LINUX_USB_G_HID_H */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct usb_hidg_report`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.

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.