From c197facc8ea08062f8f949aade6a33649ee06771 Mon Sep 17 00:00:00 2001 From: "hummerbliss@gmail.com" Date: Mon, 20 Apr 2009 17:12:35 +0200 Subject: [PATCH] netfilter: bridge: allow fragmentation of VLAN packets traversing a bridge br_nf_dev_queue_xmit only checks for ETH_P_IP packets for fragmenting but not VLAN packets. This results in dropping of large VLAN packets. This can be observed when connection tracking is enabled. Connection tracking re-assembles fragmented packets, and these have to re-fragmented when transmitting out. Also, make sure only refragmented packets are defragmented as per suggestion from Patrick McHardy. Signed-off-by: Saikiran Madugula Signed-off-by: Patrick McHardy --- net/bridge/br_netfilter.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index 3953ac4..e4a418f 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -788,15 +788,23 @@ static unsigned int br_nf_local_out(unsigned int hook, struct sk_buff *skb, return NF_STOLEN; } +#if defined(CONFIG_NF_CONNTRACK_IPV4) || defined(CONFIG_NF_CONNTRACK_IPV4_MODULE) static int br_nf_dev_queue_xmit(struct sk_buff *skb) { - if (skb->protocol == htons(ETH_P_IP) && + if (skb->nfct != NULL && + (skb->protocol == htons(ETH_P_IP) || IS_VLAN_IP(skb)) && skb->len > skb->dev->mtu && !skb_is_gso(skb)) return ip_fragment(skb, br_dev_queue_push_xmit); else return br_dev_queue_push_xmit(skb); } +#else +static int br_nf_dev_queue_xmit(struct sk_buff *skb) +{ + return br_dev_queue_push_xmit(skb); +} +#endif /* PF_BRIDGE/POST_ROUTING ********************************************/ static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff *skb, -- 1.8.2.3