netdev - Re: [PATCH V3 net-next 1/4] net: bridge: add fdb flag to extent locked port feature

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Date:   Thu, 02 Jun 2022 13:36:56 +0200
From:   Hans Schultz <schultz.hans@...il.com>
To:     Ido Schimmel <idosch@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>
Cc:     Hans Schultz <schultz.hans@...il.com>,
        Ido Schimmel <idosch@...sch.org>, davem@...emloft.net,
        kuba@...nel.org, netdev@...r.kernel.org,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, Jiri Pirko <jiri@...nulli.us>,
        Ivan Vecera <ivecera@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>, Shuah Khan <shuah@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        linux-kernel@...r.kernel.org, bridge@...ts.linux-foundation.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH V3 net-next 1/4] net: bridge: add fdb flag to extent
 locked port feature

On tor, jun 02, 2022 at 13:39, Ido Schimmel <idosch@...dia.com> wrote:
> On Thu, Jun 02, 2022 at 01:30:06PM +0300, Nikolay Aleksandrov wrote:
>> On 02/06/2022 13:17, Hans Schultz wrote:
>> > On tor, jun 02, 2022 at 12:33, Nikolay Aleksandrov <razor@...ckwall.org> wrote:
>> >> On 02/06/2022 12:17, Hans Schultz wrote:
>> >>> On tis, maj 31, 2022 at 17:23, Ido Schimmel <idosch@...dia.com> wrote:
>> >>>> On Tue, May 31, 2022 at 11:34:21AM +0200, Hans Schultz wrote:
>> > 
>> >>> Another issue is that
>> >>> bridge fdb add MAC dev DEV master static
>> >>> seems to add the entry with the SELF flag set, which I don't think is
>> >>> what we would want it to do or?
>> >>
>> >> I don't see such thing (hacked iproute2 to print the flags before cmd):
>> >> $ bridge fdb add 00:11:22:33:44:55 dev vnet110 master static
>> >> flags 0x4
>> >>
>> >> 0x4 = NTF_MASTER only
>> >>
>> > 
>> > I also get 0x4 from iproute2, but I still get SELF entries when I look
>> > with:
>> > bridge fdb show dev DEV
>> > 
>> 
>> after the above add:
>> $ bridge fdb show dev vnet110 | grep 00:11
>> 00:11:22:33:44:55 master virbr0 static

>
> I think Hans is testing with mv88e6xxx which dumps entries directly from
> HW via ndo_fdb_dump(). See dsa_slave_port_fdb_do_dump() which sets
> NTF_SELF.
>
> Hans, are you seeing the entry twice? Once with 'master' and once with
> 'self'?
>

Well yes, but I get some additional entries with 'self' for different
vlans. So from clean adding a random fdb entry I get 4 entries on the
port, 2 with 'master' and two with 'self'.
It looks like this:

# bridge fdb add  00:22:33:44:55:66 dev eth6 master static
# bridge fdb show dev eth6 | grep 55
00:22:33:44:55:66 vlan 1 master br0 offload static
00:22:33:44:55:66 master br0 offload static
00:22:33:44:55:66 vlan 1 self static
00:22:33:44:55:66 vlan 4095 self static

If I do a replace of a locked entry I only get one with the 'self' flag.