netdev - Re: [PATCH iproute2 v2] ip, link: Add support for netkit

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Message-ID: <20231120133037.7b86ec78@hermes.local>
Date: Mon, 20 Nov 2023 13:30:37 -0800
From: Stephen Hemminger <stephen@...workplumber.org>
To: Daniel Borkmann <daniel@...earbox.net>
Cc: razor@...ckwall.org, martin.lau@...nel.org, dsahern@...nel.org,
 netdev@...r.kernel.org
Subject: Re: [PATCH iproute2 v2] ip, link: Add support for netkit

On Mon, 20 Nov 2023 22:10:54 +0100
Daniel Borkmann <daniel@...earbox.net> wrote:

> +static void netkit_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
> +{
> +	if (!tb)
> +		return;
> +	if (tb[IFLA_NETKIT_MODE]) {
> +		__u32 mode = rta_getattr_u32(tb[IFLA_NETKIT_MODE]);
> +
> +		print_string(PRINT_ANY, "mode", "mode %s ",
> +			     netkit_mode_strings[mode]);

What if kernel adds a new mode in future?
Probably want something like:

		print_string(PRINT_ANY, "mode", "mode %s ",
			mode >= ARRAY_SIZE(netkit_mode_strings) ? "UNKNOWN" : netkit_mode_strings[mode]);