Re: [PATCH v8 bpf-next 03/10] libbpf: use kind layout to compute an unknown kind size

[Eduard Zingerman <eddyz87@gmail.com>]

On Mon, 2025-12-15 at 09:17 +0000, Alan Maguire wrote:

[...]

> @@ -395,8 +416,7 @@ static int btf_type_size(const struct btf_type *t)
>  	case BTF_KIND_DECL_TAG:
>  		return base_size + sizeof(struct btf_decl_tag);
>  	default:
> -		pr_debug("Unsupported BTF_KIND:%u\n", btf_kind(t));
> -		return -EINVAL;
> +		return btf_type_size_unknown(btf, t);
>  	}
>  }
>  

That's a matter of personal preference, of-course, but it seems to me
that using `kind_layouts` table from your next patch for size
computation for all kinds would be a bit more elegant.

Also, a question, should BTF validation check sizes for known kinds
and reject kind layout sections if those sizes differ from expected?

[...]