linux-kernel - RE: [EXT] Re: [v1,net-next 3/4] net: qos: police action add index for tc flower offloading

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Date:   Tue, 23 Jun 2020 07:39:05 +0000
From:   Po Liu <po.liu@....com>
To:     Ido Schimmel <idosch@...sch.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "vinicius.gomes@...el.com" <vinicius.gomes@...el.com>,
        "vlad@...lov.dev" <vlad@...lov.dev>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Alexandru Marginean <alexandru.marginean@....com>,
        "michael.chan@...adcom.com" <michael.chan@...adcom.com>,
        "vishal@...lsio.com" <vishal@...lsio.com>,
        "saeedm@...lanox.com" <saeedm@...lanox.com>,
        "leon@...nel.org" <leon@...nel.org>,
        "jiri@...lanox.com" <jiri@...lanox.com>,
        "idosch@...lanox.com" <idosch@...lanox.com>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
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        "kuba@...nel.org" <kuba@...nel.org>,
        "jhs@...atatu.com" <jhs@...atatu.com>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "simon.horman@...ronome.com" <simon.horman@...ronome.com>,
        "pablo@...filter.org" <pablo@...filter.org>,
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        "andre.guedes@...ux.intel.com" <andre.guedes@...ux.intel.com>,
        "stephen@...workplumber.org" <stephen@...workplumber.org>
Subject: RE: [EXT] Re: [v1,net-next 3/4] net: qos: police action add index for
 tc flower offloading

Hi Ido,



> -----Original Message-----
> From: Ido Schimmel <idosch@...sch.org>
> Sent: 2020年6月23日 15:10
> To: Po Liu <po.liu@....com>
> Cc: davem@...emloft.net; linux-kernel@...r.kernel.org;
> netdev@...r.kernel.org; jiri@...nulli.us; vinicius.gomes@...el.com;
> vlad@...lov.dev; Claudiu Manoil <claudiu.manoil@....com>; Vladimir
> Oltean <vladimir.oltean@....com>; Alexandru Marginean
> <alexandru.marginean@....com>; michael.chan@...adcom.com;
> vishal@...lsio.com; saeedm@...lanox.com; leon@...nel.org;
> jiri@...lanox.com; idosch@...lanox.com;
> alexandre.belloni@...tlin.com; UNGLinuxDriver@...rochip.com;
> kuba@...nel.org; jhs@...atatu.com; xiyou.wangcong@...il.com;
> simon.horman@...ronome.com; pablo@...filter.org;
> moshe@...lanox.com; m-karicheri2@...com;
> andre.guedes@...ux.intel.com; stephen@...workplumber.org
> Subject: [EXT] Re: [v1,net-next 3/4] net: qos: police action add index for tc
> flower offloading
> 
> Caution: EXT Email
> 
> On Tue, Jun 23, 2020 at 02:34:11PM +0800, Po Liu wrote:
> > From: Po Liu <Po.Liu@....com>
> >
> > Hardware may own many entries for police flow. So that make one(or
> >  multi) flow to be policed by one hardware entry. This patch add the
> > police action index provide to the driver side make it mapping the
> > driver hardware entry index.
> 
> Maybe first mention that it is possible for multiple filters in software to
> share the same policer. Something like:
> 
> "
> It is possible for several tc filters to share the same police action by
> specifying the action's index when installing the filters.
> 
> Propagate this index to device drivers through the flow offload
> intermediate representation, so that drivers could share a single hardware
> policer between multiple filters.
> "
> 
> >
> > Signed-off-by: Po Liu <Po.Liu@....com>
> > ---
> >  include/net/flow_offload.h | 1 +
> >  net/sched/cls_api.c        | 1 +
> >  2 files changed, 2 insertions(+)
> >
> > diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
> > index c2ef19c6b27d..eed98075b1ae 100644
> > --- a/include/net/flow_offload.h
> > +++ b/include/net/flow_offload.h
> > @@ -232,6 +232,7 @@ struct flow_action_entry {
> >                       bool                    truncate;
> >               } sample;
> >               struct {                                /* FLOW_ACTION_POLICE */
> > +                     u32                     index;
> >                       s64                     burst;
> >                       u64                     rate_bytes_ps;
> >                       u32                     mtu;
> > diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index
> > 6aba7d5ba1ec..fdc4c89ca1fa 100644
> > --- a/net/sched/cls_api.c
> > +++ b/net/sched/cls_api.c
> > @@ -3659,6 +3659,7 @@ int tc_setup_flow_action(struct flow_action
> *flow_action,
> >                       entry->police.rate_bytes_ps =
> >                               tcf_police_rate_bytes_ps(act);
> >                       entry->police.mtu = tcf_police_tcfp_mtu(act);
> > +                     entry->police.index = act->tcfa_index;
> >               } else if (is_tcf_ct(act)) {
> >                       entry->id = FLOW_ACTION_CT;
> >                       entry->ct.action = tcf_ct_action(act);
> > --
> > 2.17.1
> >