tools/testing/selftests/bpf/verifier/ctx_sk_lookup.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/bpf/verifier/ctx_sk_lookup.c

Extension

.c

Size

19448 bytes

Lines

533

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

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

{
	"valid 1,2,4,8-byte reads from bpf_sk_lookup",
	.insns = {
		/* 1-byte read from family field */
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, family)),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, family) + 1),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, family) + 2),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, family) + 3),
		/* 2-byte read from family field */
		BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, family)),
		BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, family) + 2),
		/* 4-byte read from family field */
		BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, family)),

		/* 1-byte read from protocol field */
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, protocol)),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, protocol) + 1),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, protocol) + 2),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, protocol) + 3),
		/* 2-byte read from protocol field */
		BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, protocol)),
		BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, protocol) + 2),
		/* 4-byte read from protocol field */
		BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, protocol)),

		/* 1-byte read from remote_ip4 field */
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip4)),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip4) + 1),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip4) + 2),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip4) + 3),
		/* 2-byte read from remote_ip4 field */
		BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip4)),
		BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip4) + 2),
		/* 4-byte read from remote_ip4 field */
		BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip4)),

		/* 1-byte read from remote_ip6 field */
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6)),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 1),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 2),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 3),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 4),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 5),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 6),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 7),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 8),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 9),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 10),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 11),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 12),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 13),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 14),
		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
			    offsetof(struct bpf_sk_lookup, remote_ip6) + 15),

Annotation

• 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.