netdev - Re: [PATCH net-next v5 2/6] ipv6: ioam: Data plane support for Pre-allocated Trace

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Message-ID: <3801e3ce-089a-2252-ebdf-558b43824459@gmail.com>
Date:   Wed, 21 Jul 2021 20:47:26 -0600
From:   David Ahern <dsahern@...il.com>
To:     Justin Iurman <justin.iurman@...ege.be>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, yoshfuji@...ux-ipv6.org,
        dsahern@...nel.org, tom@...bertland.com
Subject: Re: [PATCH net-next v5 2/6] ipv6: ioam: Data plane support for
 Pre-allocated Trace

On 7/20/21 1:42 PM, Justin Iurman wrote:
> diff --git a/include/uapi/linux/in6.h b/include/uapi/linux/in6.h
> index 5ad396a57eb3..c4c53a9ab959 100644
> --- a/include/uapi/linux/in6.h
> +++ b/include/uapi/linux/in6.h
> @@ -145,6 +145,7 @@ struct in6_flowlabel_req {
>  #define IPV6_TLV_PADN		1
>  #define IPV6_TLV_ROUTERALERT	5
>  #define IPV6_TLV_CALIPSO	7	/* RFC 5570 */
> +#define IPV6_TLV_IOAM		49	/* TEMPORARY IANA allocation for IOAM */

why temporary and what is the risk the value changes between now and the
final version?