netdev - Re: [patch net-next RFC 1/2] fib: introduce fib notification infrastructure

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Date:   Tue, 6 Sep 2016 16:44:08 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     David Ahern <dsa@...ulusnetworks.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, idosch@...lanox.com,
        eladr@...lanox.com, yotamg@...lanox.com, nogahf@...lanox.com,
        ogerlitz@...lanox.com, roopa@...ulusnetworks.com,
        nikolay@...ulusnetworks.com, linville@...driver.com, tgraf@...g.ch,
        gospo@...ulusnetworks.com, sfeldma@...il.com, ast@...mgrid.com,
        edumazet@...gle.com, hannes@...essinduktion.org,
        f.fainelli@...il.com, jhs@...atatu.com,
        vivien.didelot@...oirfairelinux.com, john.fastabend@...el.com,
        andrew@...n.ch, ivecera@...hat.com
Subject: Re: [patch net-next RFC 1/2] fib: introduce fib notification
 infrastructure

Tue, Sep 06, 2016 at 04:32:12PM CEST, dsa@...ulusnetworks.com wrote:
>On 9/6/16 6:01 AM, Jiri Pirko wrote:
>> From: Jiri Pirko <jiri@...lanox.com>
>> 
>> This allows to pass information about added/deleted fib entries to
>> whoever is interested. This is done in a very similar way as devinet
>> notifies address additions/removals.
>> 
>> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
>> ---
>>  include/net/ip_fib.h | 19 +++++++++++++++++++
>>  net/ipv4/fib_trie.c  | 43 +++++++++++++++++++++++++++++++++++++++++++
>>  2 files changed, 62 insertions(+)
>> 
>
>The notifier infrastructure should be generalized for use with IPv4 and IPv6. While the data will be family based, the infra can be generic.
>

Yeah, that I thought about as well. Thing is, ipv6 notifier has to be
atomic. That is the reason we have:
inetaddr_chain and register_inetaddr_notifier (blocking notifier)
inet6addr_chain and register_inet6addr_notifier (atomic notifier)