[PATCH v5 net-next 1/6] net: bridge: add locked entry fdb flag to extend locked port feature

[netdev at kapio-technology.com]

> 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)))