netdev - Re: [PATCH net-next v4] net: add sysctl to disable rfc4862 5.5.3e lifetime handling

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Message-ID: <0f91b58c-84bc-902c-0141-53fb8914590f@kernel.org>
Date: Tue, 3 Oct 2023 08:36:02 -0600
From: David Ahern <dsahern@...nel.org>
To: Patrick Rohr <prohr@...gle.com>, "David S. Miller" <davem@...emloft.net>
Cc: Linux Network Development Mailing List <netdev@...r.kernel.org>,
 Maciej Żenczykowski <maze@...gle.com>,
 Lorenzo Colitti <lorenzo@...gle.com>, Jen Linkova <furry@...gle.com>,
 Jiri Pirko <jiri@...nulli.us>
Subject: Re: [PATCH net-next v4] net: add sysctl to disable rfc4862 5.5.3e
 lifetime handling

On 9/25/23 3:47 PM, Patrick Rohr wrote:
> This change adds a sysctl to opt-out of RFC4862 section 5.5.3e's valid
> lifetime derivation mechanism.
> 
> RFC4862 section 5.5.3e prescribes that the valid lifetime in a Router
> Advertisement PIO shall be ignored if it less than 2 hours and to reset
> the lifetime of the corresponding address to 2 hours. An in-progress
> 6man draft (see draft-ietf-6man-slaac-renum-07 section 4.2) is currently
> looking to remove this mechanism. While this draft has not been moving
> particularly quickly for other reasons, there is widespread consensus on
> section 4.2 which updates RFC4862 section 5.5.3e.
> 
> Cc: Maciej Żenczykowski <maze@...gle.com>
> Cc: Lorenzo Colitti <lorenzo@...gle.com>
> Cc: Jen Linkova <furry@...gle.com>
> Cc: Jiri Pirko <jiri@...nulli.us>
> Cc: David Ahern <dsahern@...nel.org>
> Signed-off-by: Patrick Rohr <prohr@...gle.com>
> ---
>  Documentation/networking/ip-sysctl.rst | 11 ++++++++
>  include/linux/ipv6.h                   |  1 +
>  net/ipv6/addrconf.c                    | 38 +++++++++++++++++---------
>  3 files changed, 37 insertions(+), 13 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>