Re: [PATCH v5 net-next 2/6] net: switchdev: add support for offloading of fdb locked flag

Ido Schimmel
2022-08-27T18:35:40Z

On Fri, Aug 26, 2022 at 01:45:34PM +0200, Hans Schultz wrote:
> @@ -1403,6 +1404,15 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
> if (!p)
> flags |= BIT(BR_FDB_LOCAL);
>
> + if (locked)
> + flags |= BIT(BR_FDB_ENTRY_LOCKED);
> +
> + if (blackhole)
> + flags |= BIT(BR_FDB_BLACKHOLE);
> +
> + if (sticky)
> + flags |= BIT(BR_FDB_STICKY);
> +

While reviewing the test cases it occurred to me that the else branch
(FDB entry already exists) needs modifications as well. Something like:

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index e7f4fccb6adb..48f842a71597 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -1397,6 +1397,21 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
modified = true;
}

+ if (local != test_bit(BR_FDB_LOCAL, &fdb->flags)) {
+ change_bit(BR_FDB_LOCAL, &fdb->flags);
+ modified = true;
+ }
+
+ if (locked != test_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags)) {
+ change_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags);
+ modified = true;
+ }
+
+ if (blackhole != test_bit(BR_FDB_BLACKHOLE, &fdb->flags)) {
+ change_bit(BR_FDB_BLACKHOLE, &fdb->flags);
+ modified = true;
+ }
+
if (swdev_notify)
set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags);

> fdb = fdb_create(br, p, addr, vid, flags);
> if (!fdb) {
> err = -ENOMEM;