bridge: Add flag to control mac learning.
Allow user to control whether mac learning is enabled on the port.
By default, mac learning is enabled. Disabling mac learning will
cause new dynamic FDB entries to not be created for a particular port.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 828e2bc..7e99366 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -75,7 +75,8 @@
/* insert into forwarding database after filtering to avoid spoofing */
br = p->br;
- br_fdb_update(br, p, eth_hdr(skb)->h_source, vid);
+ if (p->flags & BR_LEARNING)
+ br_fdb_update(br, p, eth_hdr(skb)->h_source, vid);
if (!is_broadcast_ether_addr(dest) && is_multicast_ether_addr(dest) &&
br_multicast_rcv(br, p, skb))
@@ -142,7 +143,8 @@
u16 vid = 0;
br_vlan_get_tag(skb, &vid);
- br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid);
+ if (p->flags & BR_LEARNING)
+ br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid);
return 0; /* process further */
}