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

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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;
+}





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