tools/testing/selftests/bpf/progs/sk_bypass_prot_mem.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/bpf/progs/sk_bypass_prot_mem.c

Extension

.c

Size

2459 bytes

Lines

107

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

• bpf_tracing_net.h
• bpf/bpf_helpers.h
• bpf/bpf_tracing.h
• errno.h
• err.h

Detected Declarations

• struct sk_prot
• function drain_memory_per_cpu_fw_alloc
• function get_memory_allocated
• function fentry_init_sock
• function BPF_PROG
• function BPF_PROG
• function sock_create

Annotated Snippet

SEC("cgroup/sock_create")
int sock_create(struct bpf_sock *ctx)
{
	int err, val = 1;

	err = bpf_setsockopt(ctx, SOL_SOCKET, SK_BPF_BYPASS_PROT_MEM,
			     &val, sizeof(val));
	if (err)
		goto err;

	val = 0;

	err = bpf_getsockopt(ctx, SOL_SOCKET, SK_BPF_BYPASS_PROT_MEM,
			     &val, sizeof(val));
	if (err)
		goto err;

	if (val != 1) {
		err = -EINVAL;
		goto err;
	}

	return 1;

err:
	set_if_not_errno_or_zero(err, -EFAULT);
	bpf_set_retval(err);
	return 0;
}

char LICENSE[] SEC("license") = "GPL";

Annotation

• Immediate include surface: `bpf_tracing_net.h`, `bpf/bpf_helpers.h`, `bpf/bpf_tracing.h`, `errno.h`, `err.h`.
• Detected declarations: `struct sk_prot`, `function drain_memory_per_cpu_fw_alloc`, `function get_memory_allocated`, `function fentry_init_sock`, `function BPF_PROG`, `function BPF_PROG`, `function sock_create`.
• 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.