Re: [iptables PATCH v3 16/21] xtables: Optimize user-defined chain deletion

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On Thu, Dec 20, 2018 at 04:09:17PM +0100, Phil Sutter wrote:
[...]
> +	if (chain) {
> +		c = nftnl_chain_list_lookup_byname(list, chain);
> +		if (!c) {
> +			errno = ENOENT;
> +			return 0;
> +		}
> +		d.builtin_err = -2;
> +		ret = __nft_chain_user_del(c, &d);
> +		if (ret == -2)

We can probably do an upfront check for built-in chain to avoid this
special code? __nft_chain_user_del() is only called from
nft_chain_user_del().

> +			errno = EINVAL;
> +		goto out;
>  	}
>  
> +	ret = nftnl_chain_list_foreach(list, __nft_chain_user_del, &d);
> +out:
>  	/* the core expects 1 for success and 0 for error */
>  	return ret == 0 ? 1 : 0;
>  }
> -- 
> 2.19.0
> 



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