From 43598813386f6205edf3c21f1fe97f731ccb4f15 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Thu, 8 Dec 2011 07:17:49 +0000 Subject: bridge: add local MAC address to forwarding table (v2) If user has configured a MAC address that is not one of the existing ports of the bridge, then we need to add a special entry in the forwarding table. This forwarding table entry has no outgoing port so it has to be treated a little differently. The special entry is reported by the netlink interface with ifindex of bridge, but ignored by the old interface since there is no usable way to put it in the ABI. Reported-by: Koki Sanagi Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/bridge/br_fdb.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) (limited to 'net/bridge/br_fdb.c') diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index b6ae60b..a1429af 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -127,6 +127,18 @@ void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) spin_unlock_bh(&br->hash_lock); } +void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) +{ + struct net_bridge_fdb_entry *f; + + /* If old entry was unassociated with any port, then delete it. */ + f = __br_fdb_get(br, br->dev->dev_addr); + if (f && f->is_local && !f->dst) + fdb_delete(br, f); + + fdb_insert(br, NULL, newaddr); +} + void br_fdb_cleanup(unsigned long _data) { struct net_bridge *br = (struct net_bridge *)_data; @@ -250,7 +262,7 @@ int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) ret = 0; else { fdb = __br_fdb_get(port->br, addr); - ret = fdb && fdb->dst->dev != dev && + ret = fdb && fdb->dst && fdb->dst->dev != dev && fdb->dst->state == BR_STATE_FORWARDING; } rcu_read_unlock(); @@ -282,6 +294,10 @@ int br_fdb_fillbuf(struct net_bridge *br, void *buf, if (has_expired(br, f)) continue; + /* ignore pseudo entry for local MAC address */ + if (!f->dst) + continue; + if (skip) { --skip; continue; @@ -468,7 +484,7 @@ static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, ndm->ndm_pad2 = 0; ndm->ndm_flags = 0; ndm->ndm_type = 0; - ndm->ndm_ifindex = fdb->dst->dev->ifindex; + ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; ndm->ndm_state = fdb_to_nud(fdb); NLA_PUT(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr); -- cgit v1.1