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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/xfrm_info.c
Extension
.c
Size
936 bytes
Lines
42
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

struct bpf_xfrm_info___local {
	u32 if_id;
	int link;
} __attribute__((preserve_access_index));

__u32 req_if_id;
__u32 resp_if_id;

int bpf_skb_set_xfrm_info(struct __sk_buff *skb_ctx,
			  const struct bpf_xfrm_info___local *from) __ksym;
int bpf_skb_get_xfrm_info(struct __sk_buff *skb_ctx,
			  struct bpf_xfrm_info___local *to) __ksym;

SEC("tc")
int set_xfrm_info(struct __sk_buff *skb)
{
	struct bpf_xfrm_info___local info = { .if_id = req_if_id };

	return bpf_skb_set_xfrm_info(skb, &info) ? TC_ACT_SHOT : TC_ACT_UNSPEC;
}

SEC("tc")
int get_xfrm_info(struct __sk_buff *skb)
{
	struct bpf_xfrm_info___local info = {};

	if (bpf_skb_get_xfrm_info(skb, &info) < 0)
		return TC_ACT_SHOT;

	resp_if_id = info.if_id;

	return TC_ACT_UNSPEC;
}

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

Annotation

Implementation Notes