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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 <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Toshiaki Makita 2014-02-07 16:48:24 +09:00 committed by David S. Miller
parent 960b589f86
commit a778e6d1a5
1 changed files with 6 additions and 19 deletions
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25
net/bridge/br_fdb.c
View File

@ -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);