Re: [PATCH v4 net-next 2/6] net: switchdev: add support for offloading of fdb locked flag

On 2022-07-08 10:54, Vladimir Oltean wrote:

...

};

/* TODO: ideally DSA ports would have a single dp->link_dp member, diff --git a/include/net/switchdev.h b/include/net/switchdev.h index aa0171d5786d..9f83c835ee62 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -245,6 +245,7 @@ struct switchdev_notifier_fdb_info { u16 vid; u8 added_by_user:1, is_local:1,

•   is_locked:1,
  offloaded:1;
  

};

diff --git a/net/bridge/br.c b/net/bridge/br.c index 96e91d69a9a8..fe0a4741fcda 100644 --- a/net/bridge/br.c +++ b/net/bridge/br.c @@ -166,7 +166,8 @@ static int br_switchdev_event(struct notifier_block *unused, case SWITCHDEV_FDB_ADD_TO_BRIDGE: fdb_info = ptr; err = br_fdb_external_learn_add(br, p, fdb_info->addr,

• 				fdb_info->vid, false);
  

• 				fdb_info->vid, false,
  

• 				fdb_info->is_locked);
  

  if (err) { err = notifier_from_errno(err); break;

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index ee9064a536ae..32ebb18050b9 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -1136,7 +1136,7 @@ static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge *br, "FDB entry towards bridge must be permanent"); return -EINVAL; }

• err = br_fdb_external_learn_add(br, p, addr, vid, true);
  

• err = br_fdb_external_learn_add(br, p, addr, vid, true, false);
  

  } else { spin_lock_bh(&br->hash_lock); err = fdb_add_entry(br, p, addr, ndm, nlh_flags, vid, nfea_tb);

@@ -1366,7 +1366,7 @@ void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p)

int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, const unsigned char *addr, u16 vid,

• 	      bool swdev_notify)
  

• 	      bool swdev_notify, bool locked)
  

{ struct net_bridge_fdb_entry *fdb; bool modified = false; @@ -1386,6 +1386,9 @@ 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);
  

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

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 47a3598d25c8..9082451b4d40 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -811,7 +811,7 @@ int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, const unsigned char *addr, u16 vid,

• 	      bool swdev_notify);
  

• 	      bool swdev_notify, bool locked);
  

int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, const unsigned char *addr, u16 vid, bool swdev_notify); diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c index 8f3d76c751dd..85e566b856e1 100644 --- a/net/bridge/br_switchdev.c +++ b/net/bridge/br_switchdev.c @@ -136,6 +136,7 @@ static void br_switchdev_fdb_populate(struct net_bridge *br, item->added_by_user = test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags); item->offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags); item->is_local = test_bit(BR_FDB_LOCAL, &fdb->flags);

• item->is_locked = test_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags); item->info.dev = (!p || item->is_local) ? br->dev : p->dev; item->info.ctx = ctx;

} diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h index d9722e49864b..42f47a94b0f0 100644 --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h @@ -65,6 +65,7 @@ struct dsa_notifier_fdb_info { const struct dsa_port *dp; const unsigned char *addr; u16 vid;

• bool is_locked;

drop

If this is dropped, the whole scheme will not work as userspace will not get notifications of new locked entries from the driver.