include/uapi/linux/uhid.h
Source file repositories/reference/linux-study-clean/include/uapi/linux/uhid.h
File Facts
- System
- Linux kernel
- Corpus path
include/uapi/linux/uhid.h- Extension
.h- Size
- 4655 bytes
- Lines
- 201
- 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/input.hlinux/types.hlinux/hid.h
Detected Declarations
struct uhid_create2_reqstruct uhid_start_reqstruct uhid_input2_reqstruct uhid_output_reqstruct uhid_get_report_reqstruct uhid_get_report_reply_reqstruct uhid_set_report_reqstruct uhid_set_report_reply_reqstruct uhid_create_reqstruct uhid_input_reqstruct uhid_output_ev_reqstruct uhid_feature_reqstruct uhid_feature_answer_reqstruct uhid_eventenum uhid_event_typeenum uhid_dev_flagenum uhid_report_typeenum uhid_legacy_event_type
Annotated Snippet
struct uhid_create2_req {
__u8 name[128];
__u8 phys[64];
__u8 uniq[64];
__u16 rd_size;
__u16 bus;
__u32 vendor;
__u32 product;
__u32 version;
__u32 country;
__u8 rd_data[HID_MAX_DESCRIPTOR_SIZE];
} __attribute__((__packed__));
enum uhid_dev_flag {
UHID_DEV_NUMBERED_FEATURE_REPORTS = (1ULL << 0),
UHID_DEV_NUMBERED_OUTPUT_REPORTS = (1ULL << 1),
UHID_DEV_NUMBERED_INPUT_REPORTS = (1ULL << 2),
};
struct uhid_start_req {
__u64 dev_flags;
};
#define UHID_DATA_MAX 4096
enum uhid_report_type {
UHID_FEATURE_REPORT,
UHID_OUTPUT_REPORT,
UHID_INPUT_REPORT,
};
struct uhid_input2_req {
__u16 size;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
struct uhid_output_req {
__u8 data[UHID_DATA_MAX];
__u16 size;
__u8 rtype;
} __attribute__((__packed__));
struct uhid_get_report_req {
__u32 id;
__u8 rnum;
__u8 rtype;
} __attribute__((__packed__));
struct uhid_get_report_reply_req {
__u32 id;
__u16 err;
__u16 size;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
struct uhid_set_report_req {
__u32 id;
__u8 rnum;
__u8 rtype;
__u16 size;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
struct uhid_set_report_reply_req {
__u32 id;
__u16 err;
} __attribute__((__packed__));
/*
* Compat Layer
* All these commands and requests are obsolete. You should avoid using them in
* new code. We support them for backwards-compatibility, but you might not get
* access to new feature in case you use them.
*/
enum uhid_legacy_event_type {
UHID_CREATE = __UHID_LEGACY_CREATE,
UHID_OUTPUT_EV = __UHID_LEGACY_OUTPUT_EV,
UHID_INPUT = __UHID_LEGACY_INPUT,
UHID_FEATURE = UHID_GET_REPORT,
UHID_FEATURE_ANSWER = UHID_GET_REPORT_REPLY,
};
/* Obsolete! Use UHID_CREATE2. */
struct uhid_create_req {
__u8 name[128];
__u8 phys[64];
__u8 uniq[64];
__u8 __user *rd_data;
__u16 rd_size;
Annotation
- Immediate include surface: `linux/input.h`, `linux/types.h`, `linux/hid.h`.
- Detected declarations: `struct uhid_create2_req`, `struct uhid_start_req`, `struct uhid_input2_req`, `struct uhid_output_req`, `struct uhid_get_report_req`, `struct uhid_get_report_reply_req`, `struct uhid_set_report_req`, `struct uhid_set_report_reply_req`, `struct uhid_create_req`, `struct uhid_input_req`.
- 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.