From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Ahern <dsahern@kernel.org>,
Arun Ajith S <aajith@arista.com>,
netdev@vger.kernel.org
Cc: davem@davemloft.net, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, yoshfuji@linux-ipv6.org,
kuba@kernel.org, pabeni@redhat.com, corbet@lwn.net,
prestwoj@gmail.com, gilligan@arista.com, noureddine@arista.com,
gk@arista.com
Subject: Re: [PATCH net-next v3] net/ipv6: Introduce accept_unsolicited_na knob to implement router-side changes for RFC9131
Date: Wed, 13 Apr 2022 15:03:13 -0700 [thread overview]
Message-ID: <2b935c82-ea5c-af47-4455-edf3a629e941@gmail.com> (raw)
In-Reply-To: <17769a5b-9569-18ee-d1c0-c8971a42c709@kernel.org>
On 4/13/22 15:00, David Ahern wrote:
> On 4/13/22 3:22 PM, Eric Dumazet wrote:
>> On 4/13/22 07:34, Arun Ajith S wrote:
>>> Add a new neighbour cache entry in STALE state for routers on receiving
>>> an unsolicited (gratuitous) neighbour advertisement with
>>> target link-layer-address option specified.
>>> This is similar to the arp_accept configuration for IPv4.
>>> A new sysctl endpoint is created to turn on this behaviour:
>>> /proc/sys/net/ipv6/conf/interface/accept_unsolicited_na.
>>
>> Do we really need to expose this to /proc/sys, for every interface added
>> in the host ?
>>
>> /proc files creations/deletion cost a lot in environments
>> adding/deleting netns very often.
> agree with the general intent (along with the increasing memory costs).
> I do think this case should be done as a /proc/sys entry for consistency
> with both ARP and existing related NA settings.
>
>> I would prefer using NETLINK attributes, a single recvmsg() syscall can
>> fetch/set hundreds of them.
> What do you have in mind here? A link attribute managed through `ip link
> set`?
Yes, something like that, if this is a netdevice/link attribute.
next prev parent reply other threads:[~2022-04-13 22:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-13 14:34 [PATCH net-next v3] net/ipv6: Introduce accept_unsolicited_na knob to implement router-side changes for RFC9131 Arun Ajith S
2022-04-13 21:22 ` Eric Dumazet
2022-04-13 22:00 ` David Ahern
2022-04-13 22:03 ` Eric Dumazet [this message]
2022-04-13 22:07 ` David Ahern
2022-05-20 7:19 ` Arun Ajith S
2022-05-21 2:00 ` David Ahern
2022-05-27 7:35 ` Arun Ajith S
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