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authorHarald Welte <laforge@netfilter.org>2005-08-09 22:24:19 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2005-08-29 18:31:04 -0400
commit6869c4d8e066e21623c812c448a05f1ed931c9c6 (patch)
treece18efc459e121e3a0b1bf5f85615567cdb30f68 /net/bridge
parentbf3a46aa9b96f6eb3a49a568f72a2801c3e830c0 (diff)
[NETFILTER]: reduce netfilter sk_buff enlargement
As discussed at netconf'05, we're trying to save every bit in sk_buff. The patch below makes sk_buff 8 bytes smaller. I did some basic testing on my notebook and it seems to work. The only real in-tree user of nfcache was IPVS, who only needs a single bit. Unfortunately I couldn't find some other free bit in sk_buff to stuff that bit into, so I introduced a separate field for them. Maybe the IPVS guys can resolve that to further save space. Initially I wanted to shrink pkt_type to three bits (PACKET_HOST and alike are only 6 values defined), but unfortunately the bluetooth code overloads pkt_type :( The conntrack-event-api (out-of-tree) uses nfcache, but Rusty just came up with a way how to do it without any skb fields, so it's safe to remove it. - remove all never-implemented 'nfcache' code - don't have ipvs code abuse 'nfcache' field. currently get's their own compile-conditional skb->ipvs_property field. IPVS maintainers can decide to move this bit elswhere, but nfcache needs to die. - remove skb->nfcache field to save 4 bytes - move skb->nfctinfo into three unused bits to save further 4 bytes Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/netfilter/ebt_mark.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/net/bridge/netfilter/ebt_mark.c b/net/bridge/netfilter/ebt_mark.c
index 02c632b4d325..c93d35ab95c0 100644
--- a/net/bridge/netfilter/ebt_mark.c
+++ b/net/bridge/netfilter/ebt_mark.c
@@ -23,10 +23,9 @@ static int ebt_target_mark(struct sk_buff **pskb, unsigned int hooknr,
23{ 23{
24 struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data; 24 struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
25 25
26 if ((*pskb)->nfmark != info->mark) { 26 if ((*pskb)->nfmark != info->mark)
27 (*pskb)->nfmark = info->mark; 27 (*pskb)->nfmark = info->mark;
28 (*pskb)->nfcache |= NFC_ALTERED; 28
29 }
30 return info->target; 29 return info->target;
31} 30}
32 31