Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Fri, 21 Oct 2022 01:43:34 +0300
From:   Vladimir Oltean <olteanv@gmail.com>
To:     netdev@kapio-technology.com
Cc:     davem@davemloft.net, kuba@kernel.org, netdev@vger.kernel.org,
        Florian Fainelli <f.fainelli@gmail.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Vivien Didelot <vivien.didelot@gmail.com>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>,
        Kurt Kanzenbach <kurt@linutronix.de>,
        Hauke Mehrtens <hauke@hauke-m.de>,
        Woojung Huh <woojung.huh@microchip.com>,
        UNGLinuxDriver@microchip.com, Sean Wang <sean.wang@mediatek.com>,
        Landen Chao <Landen.Chao@mediatek.com>,
        DENG Qingfang <dqfext@gmail.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Claudiu Manoil <claudiu.manoil@nxp.com>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        Jiri Pirko <jiri@resnulli.us>,
        Ivan Vecera <ivecera@redhat.com>,
        Roopa Prabhu <roopa@nvidia.com>,
        Nikolay Aleksandrov <razor@blackwall.org>,
        Shuah Khan <shuah@kernel.org>,
        Russell King <linux@armlinux.org.uk>,
        Christian Marangi <ansuelsmth@gmail.com>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Yuwei Wang <wangyuweihx@gmail.com>,
        Petr Machata <petrm@nvidia.com>,
        Ido Schimmel <idosch@nvidia.com>,
        Florent Fourcot <florent.fourcot@wifirst.fr>,
        Hans Schultz <schultz.hans@gmail.com>,
        Joachim Wiberg <troglobit@gmail.com>,
        Amit Cohen <amcohen@nvidia.com>, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org,
        bridge@lists.linux-foundation.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v8 net-next 03/12] net: bridge: enable bridge to install
 locked fdb entries from drivers
Message-ID: <20221020224334.ksh4xciad7yro3cj@skbuf>
References: <20221018165619.134535-1-netdev@kapio-technology.com>
 <20221018165619.134535-4-netdev@kapio-technology.com>
 <20221020125549.v6kls2lk7etvay7c@skbuf>
 <e1184c879642c35e4ff6f19e0fd5de46@kapio-technology.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <e1184c879642c35e4ff6f19e0fd5de46@kapio-technology.com>
Precedence: bulk

On Thu, Oct 20, 2022 at 09:29:06PM +0200, netdev@kapio-technology.com wrote:
> On 2022-10-20 14:55, Vladimir Oltean wrote:
> > On Tue, Oct 18, 2022 at 06:56:10PM +0200, Hans J. Schultz wrote:
> > > diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
> > > index 8f3d76c751dd..c6b938c01a74 100644
> > > --- a/net/bridge/br_switchdev.c
> > > +++ b/net/bridge/br_switchdev.c
> > > @@ -136,6 +136,7 @@ static void br_switchdev_fdb_populate(struct
> > > net_bridge *br,
> > >  	item->added_by_user = test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags);
> > >  	item->offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags);
> > >  	item->is_local = test_bit(BR_FDB_LOCAL, &fdb->flags);
> > > +	item->locked = test_bit(BR_FDB_LOCKED, &fdb->flags);
> > 
> > Shouldn't this be set to 0 here, since it is the bridge->driver
> > direction?
> 
> Wouldn't it be a good idea to allow drivers to add what corresponds to a blackhole
> entry when using the bridge input chain to activate the MAB feature, or in general
> to leave the decision of what to do to the driver implementation?

The patch doesn't propose that. It proposes:

| net: bridge: enable bridge to install locked fdb entries from drivers
| 
| The bridge will be able to install locked entries when receiving
| SWITCHDEV_FDB_ADD_TO_BRIDGE notifications from drivers.

Please write patches which make just one logical change, and explain the
justification for that change and precisely that change in the commit
message.