The bridge does not flood ARP / NS packets for which a reply was sent to
bridge ports that have neighbor suppression enabled.
Subsequent patches are going to add per-{Port, VLAN} neighbor
suppression, which is going to make it more expensive to check whether
neighbor suppression is enabled since a VLAN lookup will be required.
Therefore, instead of unnecessarily performing this lookup for every
packet, only perform it for ARP / NS packets for which a reply was sent.
Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxx>
---
net/bridge/br_forward.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 02bb620d3b8d..0fe133fa214c 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -224,8 +224,8 @@ void br_flood(struct net_bridge *br, struct sk_buff *skb,
/* Do not flood to ports that enable proxy ARP */
if (p->flags & BR_PROXYARP)
continue;
- if ((p->flags & (BR_PROXYARP_WIFI | BR_NEIGH_SUPPRESS)) &&
- BR_INPUT_SKB_CB(skb)->proxyarp_replied)
+ if (BR_INPUT_SKB_CB(skb)->proxyarp_replied &&
+ (p->flags & (BR_PROXYARP_WIFI | BR_NEIGH_SUPPRESS)))
continue;
prev = maybe_deliver(prev, p, skb, local_orig);
--
2.37.3
