[PATCH v3 net 7/9] bridge: Properly check if local fdb entry can be deleted in br_fdb_delete_by_port
From: Toshiaki Makita <hidden>
Date: 2014-02-07 07:48:43
Subsystem:
ethernet bridge, networking [general], the rest · Maintainers:
Nikolay Aleksandrov, Ido Schimmel, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> --- 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 15bf13d..43e54d1 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);
--
1.8.1.2