netdev - Re: Linux Ipv6 stats support

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Date:   Tue, 9 Mar 2021 09:01:41 -0500
From:   Stephen Suryaputra <ssuryaextr@...il.com>
To:     Girish Kumar S <girik@...iper.net>
Cc:     David Ahern <dsahern@...il.com>,
        Yogesh Ankolekar <ayogesh@...iper.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>
Subject: Re: Linux Ipv6 stats support

Aren't those part of JUNIPER-IPv6-MIB? Is there any work to
standardize them by going to IETF for example?
Currently in the kernel IPv4 has global stats, i.e. per namespace, and
IPv6 has both per namespace as well as per net device. They are
defined in RFCs. My own opinion is that unless the stats that you're
looking for are part of a standard definition, most likely they won't
be supported. I believe Eric Dumazet and David Miller provided
feedbacks to my patch then.

My patch tried to add IPv4 per net device stats and like David Ahern
said there was resistance then.

Regards,
Stephen.

On Tue, Mar 9, 2021 at 2:37 AM Girish Kumar S <girik@...iper.net> wrote:
>
> Thanks Stephen for replying.
>
>    We are looking for below IPv6 stats support in linux and currently these are not supported. Will these stats supported in future releases ?. Please guide.
>
>
> jnxIpv6StatsFragOverFlows
> jnxIpv6StatsInHopByHops
> jnxIpv6StatsInIcmps
> jnxIpv6StatsInIgmps
> jnxIpv6StatsInIps
> jnxIpv6StatsInTcps
> jnxIpv6StatsInUdps
> jnxIpv6StatsInIdps
> jnxIpv6StatsInTps
> jnxIpv6StatsInIpv6s
> jnxIpv6StatsInRoutings
> jnxIpv6StatsInFrags
> jnxIpv6StatsInEsps
> jnxIpv6StatsInAhs
> jnxIpv6StatsInIcmpv6s
> jnxIpv6StatsInNoNhs
> jnxIpv6StatsInDestOpts
> jnxIpv6StatsInIsoIps
> jnxIpv6StatsInOspfs
> jnxIpv6StatsInEths
> jnxIpv6StatsInPims
>
> Regards,
> Girish kumar S
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: Stephen Suryaputra <ssuryaextr@...il.com>
> Sent: Tuesday, March 9, 2021 10:14 AM
> To: David Ahern <dsahern@...il.com>
> Cc: Yogesh Ankolekar <ayogesh@...iper.net>; Girish Kumar S <girik@...iper.net>; netdev@...r.kernel.org
> Subject: Re: Linux Ipv6 stats support
>
> [External Email. Be cautious of content]
>
>
> On Tue, Jan 26, 2021 at 09:05:22AM -0700, David Ahern wrote:
> > On 1/25/21 4:26 AM, Yogesh Ankolekar wrote:
> > >
> > >    We are looking for below IPv6 stats support in linux. Looks below
> > > stats are not supported. Will these stats will be supported in
> > > future or it is already supported in some version. Please guide.
> >
> > I am not aware of anyone working on adding more stats for IPv6.
> > Stephen Suryaputra attempted to add stats a few years back as I
> > believe the resistance was around memory and cpu usage for stats in the hot path.
>
> Sorry that I missed this. At that time it was IPv4 ifstats. I'm missing the rest of the context here. Which IPv6 stats are being discussed here?
>
> For my company, we have been doing the v4 stats using the implementation that I brought up to netdev then. It is useful to debug forwarding errors but it is an overhead having the out of tree patch everytime kernel upgrade is needed, esp on upgrade to a major version.
>
> Thank you,
>
> Stephen.