net: bridge: Mark FDB entries that were added by user as such

Externally learned entries can be added by a user or by a switch driver
that is notifying the bridge driver about entries that were learned in
hardware.

In the first case, the entries are not marked with the 'added_by_user'
flag, which causes switch drivers to ignore them and not offload them.

The 'added_by_user' flag can be set on externally learned FDB entries
based on the 'swdev_notify' parameter in br_fdb_external_learn_add(),
which effectively means if the created / updated FDB entry was added by
a user or not.

Fixes: 816a3bed9549 ("switchdev: Add fdb.added_by_user to switchdev notifications")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: Alexander Petrovskiy <alexpe@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Cc: Roopa Prabhu <roopa@cumulusnetworks.com>
Cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Cc: bridge@lists.linux-foundation.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index fe3c758791ca99671d57b151b656e72cba38a718..9e14767500ea8982a5b2cf33b4800a18c4562a12 100644 (file)
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -1128,6 +1128,8 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
                        err = -ENOMEM;
                        goto err_unlock;
                }
+               if (swdev_notify)
+                       fdb->added_by_user = 1;
                fdb->added_by_external_learn = 1;
                fdb_notify(br, fdb, RTM_NEWNEIGH, swdev_notify);
        } else {
@@ -1147,6 +1149,9 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
                        modified = true;
                }
 
+               if (swdev_notify)
+                       fdb->added_by_user = 1;
+
                if (modified)
                        fdb_notify(br, fdb, RTM_NEWNEIGH, swdev_notify);
        }