Re: [PATCH v4 net-next 3/6] drivers: net: dsa: add locked fdb entry flag to drivers

On Wed, Aug 24, 2022 at 10:29:20PM +0200, netdev@kapio-technology.com wrote:

On 2022-08-21 09:08, Ido Schimmel wrote:

quoted

I assume you want a hub to simulate multiple MACs behind the same port.
You don't need a hub for that. You can set the MAC using mausezahn. See
'-a' option:

"
   -a <src-mac|keyword>
       Use specified source MAC address with hexadecimal notation such
as 00:00:aa:bb:cc:dd.  By default the interface MAC address will be
used. The  keywords  ''rand''
       and  ''own''  refer to a random MAC address (only unicast
addresses are created) and the own address, respectively. You can also
use the keywords mentioned below
       although broadcast-type source addresses are officially invalid.
"

Ido, I am not so known to the selftests, so I am wondering why I don't see
either check_err or check_fail fail, whichever I use, when I think they
should and then they are not really checking...


        local mac=10:20:30:30:20:10


        $MZ $h1 -t udp -a $mac -b rand
        bridge fdb show dev $swp1 | grep -q "$mac vlan 1 master br0 locked"
        check_err $? "MAB station move: no locked entry on first injection"

        $MZ $h2 -t udp -a $mac -b rand
        bridge fdb show dev $swp1 | grep -q "$mac vlan 1 master br0 locked"
        check_err $? "MAB station move: locked entry did not move"

What is wrong here?

Did you try adding a sleep between mausezahn and the FDB dump? At least
that is what learning_test() is doing. It is possible that the packet is
not sent / processed fast enough for the bridge to learn it before the
dump.

For a mv88e6xxx test I guess I can make a check to verify that this driver
is in use?

Not in a generic forwarding test. Maybe in
tools/testing/selftests/drivers/net/dsa/

My preference would be to get as much tests as possible in
tools/testing/selftests/net/forwarding/bridge_locked_port.sh.

I'm not sure which tests you are planning for mv88e6xxx, but we can pass
/ fail test cases based on the flags we observe in the FDB dump. For
example, if the entry has the "sticky" flag, then the expectation is
that the roaming test will fail. Otherwise, it should pass.