tools/testing/selftests/bpf/progs/tc_bpf2bpf.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/tc_bpf2bpf.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/tc_bpf2bpf.c
Extension
.c
Size
449 bytes
Lines
26
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

// SPDX-License-Identifier: GPL-2.0

#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

__noinline
int subprog_tc(struct __sk_buff *skb)
{
	int ret = 1;

	__sink(skb);
	__sink(ret);
	/* let verifier know that 'subprog_tc' can change pointers to skb->data */
	bpf_skb_change_proto(skb, 0, 0);
	return ret;
}

SEC("tc")
int entry_tc(struct __sk_buff *skb)
{
	return subprog_tc(skb);
}

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

Annotation

Implementation Notes