From a778e6d1a51faaafa6a3a3cef9bee11c3bd47f9f Mon Sep 17 00:00:00 2001 From: Toshiaki Makita Date: Fri, 7 Feb 2014 16:48:24 +0900 Subject: [PATCH] bridge: Properly check if local fdb entry can be deleted in br_fdb_delete_by_port br_fdb_delete_by_port() doesn't care about vlan and mac address of the bridge device. As the check is almost the same as mac address changing, slightly modify fdb_delete_local() and use it. Note that we can always set added_by_user to 0 in fdb_delete_local() because - br_fdb_delete_by_port() calls fdb_delete_local() for local entries regardless of its added_by_user. In this case, we have to check if another port has the same address and vlan, and if found, we have to create the entry (by changing dst). This is kernel-added entry, not user-added. - br_fdb_changeaddr() doesn't call fdb_delete_local() for user-added entry. Signed-off-by: Toshiaki Makita Acked-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/bridge/br_fdb.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 15bf13d0b543..43e54d1ae956 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -103,6 +103,7 @@ static void fdb_delete_local(struct net_bridge *br, if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && (!vid || nbp_vlan_find(op, vid))) { f->dst = op; + f->added_by_user = 0; return; } } @@ -111,6 +112,7 @@ static void fdb_delete_local(struct net_bridge *br, if (p && ether_addr_equal(br->dev->dev_addr, addr) && (!vid || br_vlan_find(br, vid))) { f->dst = NULL; + f->added_by_user = 0; return; } @@ -261,26 +263,11 @@ void br_fdb_delete_by_port(struct net_bridge *br, if (f->is_static && !do_all) continue; - /* - * if multiple ports all have the same device address - * then when one port is deleted, assign - * the local entry to other port - */ - if (f->is_local) { - struct net_bridge_port *op; - list_for_each_entry(op, &br->port_list, list) { - if (op != p && - ether_addr_equal(op->dev->dev_addr, - f->addr.addr)) { - f->dst = op; - f->added_by_user = 0; - goto skip_delete; - } - } - } - fdb_delete(br, f); - skip_delete: ; + if (f->is_local) + fdb_delete_local(br, p, f); + else + fdb_delete(br, f); } } spin_unlock_bh(&br->hash_lock);