On Tue, Nov 05, 2024 at 03:39:54PM +0200, Ido Schimmel wrote: > It is currently impossible to delete individual FDB entries (as opposed > to flushing) that were added with a VLAN that no longer exists: > > # ip link add name dummy1 up type dummy > # ip link add name br1 up type bridge vlan_filtering 1 > # ip link set dev dummy1 master br1 > # bridge fdb add 00:11:22:33:44:55 dev dummy1 master static vlan 1 > # bridge vlan del vid 1 dev dummy1 > # bridge fdb get 00:11:22:33:44:55 br br1 vlan 1 > 00:11:22:33:44:55 dev dummy1 vlan 1 master br1 static > # bridge fdb del 00:11:22:33:44:55 dev dummy1 master vlan 1 > RTNETLINK answers: Invalid argument > # bridge fdb get 00:11:22:33:44:55 br br1 vlan 1 > 00:11:22:33:44:55 dev dummy1 vlan 1 master br1 static > > This is in contrast to MDB entries that can be deleted after the VLAN > was deleted: > > # bridge vlan add vid 10 dev dummy1 > # bridge mdb add dev br1 port dummy1 grp 239.1.1.1 permanent vid 10 > # bridge vlan del vid 10 dev dummy1 > # bridge mdb get dev br1 grp 239.1.1.1 vid 10 > dev br1 port dummy1 grp 239.1.1.1 permanent vid 10 > # bridge mdb del dev br1 port dummy1 grp 239.1.1.1 permanent vid 10 > # bridge mdb get dev br1 grp 239.1.1.1 vid 10 > Error: bridge: MDB entry not found. > > Align the two interfaces and allow user space to delete FDB entries that > were added with a VLAN that no longer exists: > > # ip link add name dummy1 up type dummy > # ip link add name br1 up type bridge vlan_filtering 1 > # ip link set dev dummy1 master br1 > # bridge fdb add 00:11:22:33:44:55 dev dummy1 master static vlan 1 > # bridge vlan del vid 1 dev dummy1 > # bridge fdb get 00:11:22:33:44:55 br br1 vlan 1 > 00:11:22:33:44:55 dev dummy1 vlan 1 master br1 static > # bridge fdb del 00:11:22:33:44:55 dev dummy1 master vlan 1 > # bridge fdb get 00:11:22:33:44:55 br br1 vlan 1 > Error: Fdb entry not found. > > Add a selftest to make sure this behavior does not regress: > > # ./rtnetlink.sh -t kci_test_fdb_del > PASS: bridge fdb del > > Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxx> > Reviewed-by: Andy Roulin <aroulin@xxxxxxxxxx> > Reviewed-by: Petr Machata <petrm@xxxxxxxxxx> > --- > net/bridge/br_fdb.c | 9 ++---- > tools/testing/selftests/net/rtnetlink.sh | 40 ++++++++++++++++++++++++ > 2 files changed, 42 insertions(+), 7 deletions(-) > Nice catch, I'd even queue it for -net. :) Of course we should be able to delete anything. Acked-by: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>
