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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-06-08 18:09:52 +0400 |
|---|---|---|
| committer | Patrick McHardy <kaber@trash.net> | 2010-06-08 18:09:52 +0400 |
| commit | 5bfddbd46a95c978f4d3c992339cbdf4f4b790a3 (patch) | |
| tree | 9291ba4e1e3c7bf7ae8b5dfa8271e7127a6a6958 /net/ipv4 | |
| parent | 339bb99e4a8ba1f8960eed21d50be808b35ad22a (diff) | |
| download | linux-5bfddbd46a95c978f4d3c992339cbdf4f4b790a3.tar.xz | |
netfilter: nf_conntrack: IPS_UNTRACKED bit
NOTRACK makes all cpus share a cache line on nf_conntrack_untracked
twice per packet. This is bad for performance.
__read_mostly annotation is also a bad choice.
This patch introduces IPS_UNTRACKED bit so that we can use later a
per_cpu untrack structure more easily.
A new helper, nf_ct_untracked_get() returns a pointer to
nf_conntrack_untracked.
Another one, nf_ct_untracked_status_or() is used by nf_nat_init() to add
IPS_NAT_DONE_MASK bits to untracked status.
nf_ct_is_untracked() prototype is changed to work on a nf_conn pointer.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/netfilter/nf_nat_core.c | 2 | ||||
| -rw-r--r-- | net/ipv4/netfilter/nf_nat_standalone.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c index 4f8bddb760c9..c7719b283ada 100644 --- a/net/ipv4/netfilter/nf_nat_core.c +++ b/net/ipv4/netfilter/nf_nat_core.c @@ -742,7 +742,7 @@ static int __init nf_nat_init(void) spin_unlock_bh(&nf_nat_lock); /* Initialize fake conntrack so that NAT will skip it */ - nf_conntrack_untracked.status |= IPS_NAT_DONE_MASK; + nf_ct_untracked_status_or(IPS_NAT_DONE_MASK); l3proto = nf_ct_l3proto_find_get((u_int16_t)AF_INET); diff --git a/net/ipv4/netfilter/nf_nat_standalone.c b/net/ipv4/netfilter/nf_nat_standalone.c index beb25819c9c9..6723c682250d 100644 --- a/net/ipv4/netfilter/nf_nat_standalone.c +++ b/net/ipv4/netfilter/nf_nat_standalone.c @@ -98,7 +98,7 @@ nf_nat_fn(unsigned int hooknum, return NF_ACCEPT; /* Don't try to NAT if this packet is not conntracked */ - if (ct == &nf_conntrack_untracked) + if (nf_ct_is_untracked(ct)) return NF_ACCEPT; nat = nfct_nat(ct); |