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;
MIME-Version: 1.0
Date:   Mon, 29 Aug 2022 13:09:12 +0200
From:   netdev@kapio-technology.com
To:     Nikolay Aleksandrov <razor@blackwall.org>
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>,
        Vladimir Oltean <olteanv@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>, Shuah Khan <shuah@kernel.org>,
        Christian Marangi <ansuelsmth@gmail.com>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Yuwei Wang <wangyuweihx@gmail.com>,
        Ido Schimmel <idosch@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 v5 net-next 1/6] net: bridge: add locked entry fdb flag to
 extend locked port feature
In-Reply-To: <e9eb5b72-073a-f182-13b7-37fc53611d5f@blackwall.org>
References: <20220826114538.705433-1-netdev@kapio-technology.com>
 <20220826114538.705433-2-netdev@kapio-technology.com>
 <e9eb5b72-073a-f182-13b7-37fc53611d5f@blackwall.org>
User-Agent: Gigahost Webmail
Message-ID: <d90a67c5ca6035f7ae75b7bada430e03@kapio-technology.com>
Content-Type: text/plain; charset=US-ASCII;
 format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

> On 2022-08-27 13:30, Nikolay Aleksandrov wrote:

>> @@ -879,6 +888,10 @@ void br_fdb_update(struct net_bridge *br, struct 
>> net_bridge_port *source,
>>  						      &fdb->flags)))
>>  					clear_bit(BR_FDB_ADDED_BY_EXT_LEARN,
>>  						  &fdb->flags);
>> +				if (source->flags & BR_PORT_MAB)
>> +					set_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags);
>> +				else
>> +					clear_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags);
> Please add a test for that bit and only then change it.
> 

Something like this?

@@ -749,6 +756,12 @@ void br_fdb_update(struct net_bridge *br, struct 
net_bridge_port *source,
                                                       &fdb->flags)))
                                         
clear_bit(BR_FDB_ADDED_BY_EXT_LEARN,
                                                   &fdb->flags);
+                               if 
(unlikely(test_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags))) {
+                                       if (!(source->flags & 
BR_PORT_MAB))
+                                               
clear_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags);
+                               } else
+                                       if (source->flags & BR_PORT_MAB)
+                                               
set_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags);
                         }

                         if (unlikely(test_bit(BR_FDB_ADDED_BY_USER, 
&flags)))