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Date: Mon, 15 Apr 2019 19:00:10 +0200 From: Pablo Neira Ayuso <pablo@...filter.org> To: netfilter-devel@...r.kernel.org Cc: davem@...emloft.net, netdev@...r.kernel.org Subject: [PATCH 04/22] netfilter: nf_flowtable: skip device lookup from interface index Use the output device from the route that we cache in the flowtable entry. Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org> --- net/netfilter/nf_flow_table_ip.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c index 1d291a51cd45..6452550d187f 100644 --- a/net/netfilter/nf_flow_table_ip.c +++ b/net/netfilter/nf_flow_table_ip.c @@ -235,13 +235,10 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, if (tuplehash == NULL) return NF_ACCEPT; - outdev = dev_get_by_index_rcu(state->net, tuplehash->tuple.oifidx); - if (!outdev) - return NF_ACCEPT; - dir = tuplehash->tuple.dir; flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); rt = (struct rtable *)flow->tuplehash[dir].tuple.dst_cache; + outdev = rt->dst.dev; if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu)) && (ip_hdr(skb)->frag_off & htons(IP_DF)) != 0) @@ -452,13 +449,10 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, if (tuplehash == NULL) return NF_ACCEPT; - outdev = dev_get_by_index_rcu(state->net, tuplehash->tuple.oifidx); - if (!outdev) - return NF_ACCEPT; - dir = tuplehash->tuple.dir; flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); rt = (struct rt6_info *)flow->tuplehash[dir].tuple.dst_cache; + outdev = rt->dst.dev; if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu))) return NF_ACCEPT; -- 2.11.0
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