netdev - RE: [RFC PATCH net-next v2 1/4] flow_dissector: Add PPPoE dissectors

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Message-ID: <MW4PR11MB57768B60FCA65A41E9B0A4A7FDBD9@MW4PR11MB5776.namprd11.prod.outlook.com>
Date:   Fri, 1 Jul 2022 10:58:40 +0000
From:   "Drewek, Wojciech" <wojciech.drewek@...el.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     Marcin Szycik <marcin.szycik@...ux.intel.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "gustavoars@...nel.org" <gustavoars@...nel.org>,
        "baowen.zheng@...igine.com" <baowen.zheng@...igine.com>,
        "boris.sukholitko@...adcom.com" <boris.sukholitko@...adcom.com>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "jhs@...atatu.com" <jhs@...atatu.com>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "kurt@...utronix.de" <kurt@...utronix.de>,
        "pablo@...filter.org" <pablo@...filter.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "paulb@...dia.com" <paulb@...dia.com>,
        "simon.horman@...igine.com" <simon.horman@...igine.com>,
        "komachi.yoshiki@...il.com" <komachi.yoshiki@...il.com>,
        "zhangkaiheb@....com" <zhangkaiheb@....com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "michal.swiatkowski@...ux.intel.com" 
        <michal.swiatkowski@...ux.intel.com>,
        "Lobakin, Alexandr" <alexandr.lobakin@...el.com>
Subject: RE: [RFC PATCH net-next v2 1/4] flow_dissector: Add PPPoE dissectors



> -----Original Message-----
> From: Jakub Kicinski <kuba@...nel.org>
> Sent: środa, 29 czerwca 2022 17:20
> To: Drewek, Wojciech <wojciech.drewek@...el.com>
> Cc: Marcin Szycik <marcin.szycik@...ux.intel.com>; netdev@...r.kernel.org; Nguyen, Anthony L <anthony.l.nguyen@...el.com>;
> davem@...emloft.net; xiyou.wangcong@...il.com; Brandeburg, Jesse <jesse.brandeburg@...el.com>; gustavoars@...nel.org;
> baowen.zheng@...igine.com; boris.sukholitko@...adcom.com; edumazet@...gle.com; jhs@...atatu.com; jiri@...nulli.us;
> kurt@...utronix.de; pablo@...filter.org; pabeni@...hat.com; paulb@...dia.com; simon.horman@...igine.com;
> komachi.yoshiki@...il.com; zhangkaiheb@....com; intel-wired-lan@...ts.osuosl.org; michal.swiatkowski@...ux.intel.com; Lobakin,
> Alexandr <alexandr.lobakin@...el.com>
> Subject: Re: [RFC PATCH net-next v2 1/4] flow_dissector: Add PPPoE dissectors
> 
> On Wed, 29 Jun 2022 07:44:50 +0000 Drewek, Wojciech wrote:
> > > > +static bool is_ppp_proto_supported(__be16 proto)
> > >
> > > What does supported mean in this context?
> >
> > It means that only those protocols are going to be dissected.
> 
> We only dissect PPP_IP and PPP_IPV6. This looks more like a list of all
> known protocols.

Sorry, maybe I wasn't precise enough. It is a list of protocols that user can match on.
In case of PPP_IP and PPP_IPV6 user can also match on inner fields specific for ipv4
and ipv6.