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netfilter: bridge: refactor conditional in br_nf_dev_queue_xmit

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simpilifies followup patch that re-works brnf ip_fragment handling.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2015-03-05 00:52:36 +01:00 committed by Pablo Neira Ayuso
parent 4a9d2f2008
commit 7a8d831df5
1 changed files with 6 additions and 3 deletions
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9
net/bridge/br_netfilter.c
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@ -803,13 +803,16 @@ static int br_nf_dev_queue_xmit(struct sk_buff *skb)
{
int ret;
int frag_max_size;
unsigned int mtu_reserved;
if (skb_is_gso(skb) || skb->protocol != htons(ETH_P_IP))
return br_dev_queue_push_xmit(skb);
mtu_reserved = nf_bridge_mtu_reduction(skb);
/* This is wrong! We should preserve the original fragment
* boundaries by preserving frag_list rather than refragmenting.
*/
if (skb->protocol == htons(ETH_P_IP) &&
skb->len + nf_bridge_mtu_reduction(skb) > skb->dev->mtu &&
!skb_is_gso(skb)) {
if (skb->len + mtu_reserved > skb->dev->mtu) {
frag_max_size = BR_INPUT_SKB_CB(skb)->frag_max_size;
if (br_parse_ip_options(skb))
/* Drop invalid packet */