tools/testing/selftests/bpf/xdp_metadata.h

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/bpf/xdp_metadata.h

Extension

.h

Size

817 bytes

Lines

53

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.

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

• struct xdp_meta
• enum xdp_meta_field

Annotated Snippet

struct xdp_meta {
	union {
		__u64 rx_timestamp;
		__s32 rx_timestamp_err;
	};
	__u64 xdp_timestamp;
	__u32 rx_hash;
	union {
		__u32 rx_hash_type;
		__s32 rx_hash_err;
	};
	union {
		struct {
			__be16 rx_vlan_proto;
			__u16 rx_vlan_tci;
		};
		__s32 rx_vlan_tag_err;
	};
	enum xdp_meta_field hint_valid;
};

Annotation

• Detected declarations: `struct xdp_meta`, `enum xdp_meta_field`.
• Atlas domain: Support Tooling And Documentation / tools.
• 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.