Re: [PATCH bpf-next,v3 2/4] xfrm: interface: Add unstable helpers for setting/getting XFRM metadata from TC-BPF

On 12/1/22 1:14 PM, Eyal Birger wrote:

+int bpf_skb_get_xfrm_info(struct __sk_buff *skb_ctx, struct bpf_xfrm_info *to) +{

• struct sk_buff *skb = (struct sk_buff *)skb_ctx;
• struct xfrm_md_info *info;
• memset(to, 0, sizeof(*to));

This zero-ing is also not needed. verifier ensures "to" is initialized before calling this kfunc.

• info = skb_xfrm_md_info(skb);
• if (!info)

• return -EINVAL;
  

• to->if_id = info->if_id;
• to->link = info->link;
• return 0;

+}