tools/testing/selftests/hid/progs/hid_bpf_helpers.h

Source file repositories/reference/linux-study-clean/tools/testing/selftests/hid/progs/hid_bpf_helpers.h

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/hid/progs/hid_bpf_helpers.h
Extension
.h
Size
4259 bytes
Lines
136
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct hid_device {
	unsigned int id;
} __attribute__((preserve_access_index));

struct bpf_wq {
	__u64 __opaque[2];
};

struct hid_bpf_ctx {
	struct hid_device *hid;
	__u32 allocated_size;
	union {
		__s32 retval;
		__s32 size;
	};
} __attribute__((preserve_access_index));

enum hid_class_request {
	HID_REQ_GET_REPORT		= 0x01,
	HID_REQ_GET_IDLE		= 0x02,
	HID_REQ_GET_PROTOCOL		= 0x03,
	HID_REQ_SET_REPORT		= 0x09,
	HID_REQ_SET_IDLE		= 0x0A,
	HID_REQ_SET_PROTOCOL		= 0x0B,
};

struct hid_bpf_ops {
	int			hid_id;
	u32			flags;
	struct list_head	list;
	int (*hid_device_event)(struct hid_bpf_ctx *ctx, enum hid_report_type report_type,
				u64 source);
	int (*hid_rdesc_fixup)(struct hid_bpf_ctx *ctx);
	int (*hid_hw_request)(struct hid_bpf_ctx *ctx, unsigned char reportnum,
			       enum hid_report_type rtype, enum hid_class_request reqtype,
			       u64 source);
	int (*hid_hw_output_report)(struct hid_bpf_ctx *ctx, u64 source);
	struct hid_device *hdev;
};

#ifndef BPF_F_BEFORE
#define BPF_F_BEFORE (1U << 3)
#endif

/* following are kfuncs exported by HID for HID-BPF */
extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
			      unsigned int offset,
			      const size_t __sz) __weak __ksym;
extern struct hid_bpf_ctx *hid_bpf_allocate_context(unsigned int hid_id) __weak __ksym;
extern void hid_bpf_release_context(struct hid_bpf_ctx *ctx) __weak __ksym;
extern int hid_bpf_hw_request(struct hid_bpf_ctx *ctx,
			      __u8 *data,
			      size_t buf__sz,
			      enum hid_report_type type,
			      enum hid_class_request reqtype) __weak __ksym;
extern int hid_bpf_hw_output_report(struct hid_bpf_ctx *ctx,
				    __u8 *buf, size_t buf__sz) __weak __ksym;
extern int hid_bpf_input_report(struct hid_bpf_ctx *ctx,
				enum hid_report_type type,
				__u8 *data,
				size_t buf__sz) __weak __ksym;
extern int hid_bpf_try_input_report(struct hid_bpf_ctx *ctx,
				    enum hid_report_type type,
				    __u8 *data,
				    size_t buf__sz) __weak __ksym;

/* bpf_wq implementation */
extern int bpf_wq_init(struct bpf_wq *wq, void *p__map, unsigned int flags) __weak __ksym;
extern int bpf_wq_start(struct bpf_wq *wq, unsigned int flags) __weak __ksym;
extern int bpf_wq_set_callback(struct bpf_wq *wq,
		int (*callback_fn)(void *, int *, void *),
		unsigned int flags) __weak __ksym;

#endif /* __HID_BPF_HELPERS_H */

Annotation

Implementation Notes