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bridge: Reorder neighbor suppression check when flooding

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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@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel
2023-04-19 18:34:52 +03:00
committed by David S. Miller
parent 1cf3fe1c37
commit 013a7ce81d
1 changed files with 2 additions and 2 deletions
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4
net/bridge/br_forward.c
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@@ -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);