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Date: Tue, 3 Oct 2023 08:36:02 -0600
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Subject: Re: [PATCH net-next v4] net: add sysctl to disable rfc4862 5.5.3e
 lifetime handling
Content-Language: en-US
To: Patrick Rohr <prohr@google.com>, "David S. Miller" <davem@davemloft.net>
Cc: Linux Network Development Mailing List <netdev@vger.kernel.org>,
 =?UTF-8?Q?Maciej_=c5=bbenczykowski?= <maze@google.com>,
 Lorenzo Colitti <lorenzo@google.com>, Jen Linkova <furry@google.com>,
 Jiri Pirko <jiri@resnulli.us>
References: <20230925214711.959704-1-prohr@google.com>
From: David Ahern <dsahern@kernel.org>
In-Reply-To: <20230925214711.959704-1-prohr@google.com>
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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@google.com>
> Cc: Lorenzo Colitti <lorenzo@google.com>
> Cc: Jen Linkova <furry@google.com>
> Cc: Jiri Pirko <jiri@resnulli.us>
> Cc: David Ahern <dsahern@kernel.org>
> Signed-off-by: Patrick Rohr <prohr@google.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@kernel.org>