tools/testing/selftests/sched_ext/non_scx_kfunc_deny.bpf.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/sched_ext/non_scx_kfunc_deny.bpf.c

Extension

.c

Size

1197 bytes

Lines

40

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

• scx/common.bpf.h

Detected Declarations

• function Copyright
• function BPF_PROG

Annotated Snippet

void BPF_PROG(tcp_ca_cong_avoid, struct sock *sk, __u32 ack, __u32 acked) {}

SEC("struct_ops/undo_cwnd")
__u32 BPF_PROG(tcp_ca_undo_cwnd, struct sock *sk) { return 2; }

SEC(".struct_ops")
struct tcp_congestion_ops tcp_non_scx_ca = {
	.ssthresh   = (void *)tcp_ca_ssthresh,
	.cong_avoid = (void *)tcp_ca_cong_avoid,
	.undo_cwnd  = (void *)tcp_ca_undo_cwnd,
	.name       = "tcp_kfunc_deny",
};

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

Annotation

• Immediate include surface: `scx/common.bpf.h`.
• Detected declarations: `function Copyright`, `function BPF_PROG`.
• 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.