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Message-ID: <4749d6b6-c20c-fd20-f904-accee3f1947a@blackwall.org>
Date:   Mon, 29 Aug 2022 12:51:14 +0300
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Subject: Re: [PATCH v5 net-next 1/6] net: bridge: add locked entry fdb flag to
 extend locked port feature
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To:     Ido Schimmel <idosch@nvidia.com>, 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>,
        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>,
        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
References: <20220826114538.705433-1-netdev@kapio-technology.com>
 <20220826114538.705433-2-netdev@kapio-technology.com>
 <Ywo16vHMqxxszWzX@shredder>
 <dd9a4156fe421f6be3a49f5b928ef77e@kapio-technology.com>
 <YwxwPJOx/n5SHZM5@shredder>
From:   Nikolay Aleksandrov <razor@blackwall.org>
In-Reply-To: <YwxwPJOx/n5SHZM5@shredder>
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On 29/08/2022 10:52, Ido Schimmel wrote:
> On Sun, Aug 28, 2022 at 12:23:30PM +0200, netdev@kapio-technology.com wrote:
>> On 2022-08-27 17:19, Ido Schimmel wrote:
>>> On Fri, Aug 26, 2022 at 01:45:33PM +0200, Hans Schultz wrote:
>>>>
>>>>  	nbp_switchdev_frame_mark(p, skb);
>>>> @@ -943,6 +946,10 @@ static int br_setport(struct net_bridge_port
>>>> *p, struct nlattr *tb[],
>>>>  	br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
>>>> BR_NEIGH_SUPPRESS);
>>>>  	br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
>>>>  	br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED);
>>>> +	br_set_port_flag(p, tb, IFLA_BRPORT_MAB, BR_PORT_MAB);
>>>> +
>>>> +	if (!(p->flags & BR_PORT_LOCKED))
>>>> +		p->flags &= ~BR_PORT_MAB;
>>
>> The reason for this is that I wanted it to be so that if you have MAB
>> enabled (and locked of course) and unlock the port, it will automatically
>> clear both flags instead of having to first disable MAB and then unlock the
>> port.
> 
> User space can just do:
> 
> # bridge link set dev swp1 locked off mab off
> 
> I prefer not to push such logic into the kernel and instead fail
> explicitly. I won't argue if more people are in favor.

+1

I prefer to fail explicitly too, actually I also had a comment about this but
somehow have managed to delete it before sending my review. :)