[NETFILTER]: nf_nat: kill helper and seq_adjust hooks
authorPatrick McHardy <kaber@trash.net>
Mon, 14 Apr 2008 09:15:52 +0000 (11:15 +0200)
committerPatrick McHardy <kaber@trash.net>
Mon, 14 Apr 2008 09:15:52 +0000 (11:15 +0200)
commitdd13b010368f85dfa59364ba87bfe8ae930b2832
treef7f0a8fa77858674564aeb614499f40dd3c6dcd8
parent55871d04793d9c069ee277b1e98794b88d92ed80
[NETFILTER]: nf_nat: kill helper and seq_adjust hooks

Connection tracking helpers (specifically FTP) need to be called
before NAT sequence numbers adjustments are performed to be able
to compare them against previously seen ones. We've introduced
two new hooks around 2.6.11 to maintain this ordering when NAT
modules were changed to get called from conntrack helpers directly.

The cost of netfilter hooks is quite high and sequence number
adjustments are only rarely needed however. Add a RCU-protected
sequence number adjustment function pointer and call it from
IPv4 conntrack after calling the helper.

Signed-off-by: Patrick McHardy <kaber@trash.net>
include/linux/netfilter_ipv4.h
include/net/netfilter/nf_nat_helper.h
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
net/ipv4/netfilter/nf_nat_core.c
net/ipv4/netfilter/nf_nat_helper.c
net/ipv4/netfilter/nf_nat_standalone.c