Question about bridge netfilter.

[陳國成]

Hi,

In linux 2.6.30, can anyone tell me the purpose of
'skb->rtable = bridge_parent_rtable(nf_bridge->physindev);' in
br_nf_pre_routing_finish()?
http://lxr.linux.no/#linux+v2.6.30/net/bridge/br_netfilter.c#L407

Or where can I find more information about this?

Are there any side effect if I set skb->rtable back to NULL without
decreasing the reference count of "skb->rtable->u.dst"?

Thanks,
GC