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bridge: Save frag_max_size between PRE_ROUTING and POST_ROUTING

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As we may defragment the packet in IPv4 PRE_ROUTING and refragment
it after POST_ROUTING we should save the value of frag_max_size.

This is still very wrong as the bridge is supposed to leave the
packets intact, meaning that the right thing to do is to use the
original frag_list for fragmentation.

Unfortunately we don't currently guarantee that the frag_list is
left untouched throughout netfilter so until this changes this is
the best we can do.

There is also a spot in FORWARD where it appears that we can
forward a packet without going through fragmentation, mark it
so that we can fix it later.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu
2014-10-05 12:00:22 +08:00
committed by David S. Miller
parent 88b09a6d95
commit 93fdd47e52
2 changed files with 15 additions and 0 deletions
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4
net/bridge/br_private.h
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@@ -305,10 +305,14 @@ struct net_bridge
struct br_input_skb_cb {
struct net_device *brdev;
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
int igmp;
int mrouters_only;
#endif
u16 frag_max_size;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
bool vlan_filtered;
#endif