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Message-ID: <20080721164039.GQ13264@martell.zuzino.mipt.ru>
Date: Mon, 21 Jul 2008 20:40:39 +0400
From: Alexey Dobriyan <adobriyan@...il.com>
To: kaber@...sh.net
Cc: netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
xemul@...nvz.org, den@...nvz.org, ebiederm@...ssion.com,
dlezcano@...ibm.com, benjamin.thery@...l.net
Subject: [PATCH 13/31] netns ct: pass netns to nf_conntrack_in
It's used for resolving conntracks in netns and (later) for conntrack statistics.
Can grab netns from skb->dev or ->skb->dst->dev in nf_conntrack_in(), but
relevant netns is know at every nf_conntrack_in() user, so avoid branches.
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
include/net/netfilter/nf_conntrack_core.h | 2 +-
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 4 ++--
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c | 24 ++++++++++++++++--------
net/netfilter/nf_conntrack_core.c | 10 +++++-----
4 files changed, 24 insertions(+), 16 deletions(-)
--- a/include/net/netfilter/nf_conntrack_core.h
+++ b/include/net/netfilter/nf_conntrack_core.h
@@ -20,7 +20,7 @@
/* This header is used to share core functionality between the
standalone connection tracking module, and the compatibility layer's use
of connection tracking. */
-extern unsigned int nf_conntrack_in(int pf,
+extern unsigned int nf_conntrack_in(struct net *net, int pf,
unsigned int hooknum,
struct sk_buff *skb);
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -172,7 +172,7 @@ static unsigned int ipv4_conntrack_in(unsigned int hooknum,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- return nf_conntrack_in(PF_INET, hooknum, skb);
+ return nf_conntrack_in(dev_net(in), PF_INET, hooknum, skb);
}
static unsigned int ipv4_conntrack_local(unsigned int hooknum,
@@ -188,7 +188,7 @@ static unsigned int ipv4_conntrack_local(unsigned int hooknum,
printk("ipt_hook: happy cracking.\n");
return NF_ACCEPT;
}
- return nf_conntrack_in(PF_INET, hooknum, skb);
+ return nf_conntrack_in(dev_net(out), PF_INET, hooknum, skb);
}
/* Connection tracking may drop packets, but never alters them, so
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -211,11 +211,10 @@ static unsigned int ipv6_defrag(unsigned int hooknum,
return NF_STOLEN;
}
-static unsigned int ipv6_conntrack_in(unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+static unsigned int __ipv6_conntrack_in(struct net *net,
+ unsigned int hooknum,
+ struct sk_buff *skb,
+ int (*okfn)(struct sk_buff *))
{
struct sk_buff *reasm = skb->nfct_reasm;
@@ -225,7 +224,7 @@ static unsigned int ipv6_conntrack_in(unsigned int hooknum,
if (!reasm->nfct) {
unsigned int ret;
- ret = nf_conntrack_in(PF_INET6, hooknum, reasm);
+ ret = nf_conntrack_in(net, PF_INET6, hooknum, reasm);
if (ret != NF_ACCEPT)
return ret;
}
@@ -235,7 +234,16 @@ static unsigned int ipv6_conntrack_in(unsigned int hooknum,
return NF_ACCEPT;
}
- return nf_conntrack_in(PF_INET6, hooknum, skb);
+ return nf_conntrack_in(net, PF_INET6, hooknum, skb);
+}
+
+static unsigned int ipv6_conntrack_in(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return __ipv6_conntrack_in(dev_net(in), hooknum, skb, okfn);
}
static unsigned int ipv6_conntrack_local(unsigned int hooknum,
@@ -250,7 +258,7 @@ static unsigned int ipv6_conntrack_local(unsigned int hooknum,
printk("ipv6_conntrack_local: packet too short\n");
return NF_ACCEPT;
}
- return ipv6_conntrack_in(hooknum, skb, in, out, okfn);
+ return __ipv6_conntrack_in(dev_net(out), hooknum, skb, okfn);
}
static struct nf_hook_ops ipv6_conntrack_ops[] __read_mostly = {
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -607,7 +607,7 @@ init_conntrack(struct net *net,
/* On success, returns conntrack ptr, sets skb->nfct and ctinfo */
static inline struct nf_conn *
-resolve_normal_ct(struct sk_buff *skb,
+resolve_normal_ct(struct net *net, struct sk_buff *skb,
unsigned int dataoff,
u_int16_t l3num,
u_int8_t protonum,
@@ -628,9 +628,9 @@ resolve_normal_ct(struct sk_buff *skb,
}
/* look for tuple match */
- h = nf_conntrack_find_get(&init_net, &tuple);
+ h = nf_conntrack_find_get(net, &tuple);
if (!h) {
- h = init_conntrack(&init_net, &tuple, l3proto, l4proto, skb, dataoff);
+ h = init_conntrack(net, &tuple, l3proto, l4proto, skb, dataoff);
if (!h)
return NULL;
if (IS_ERR(h))
@@ -664,7 +664,7 @@ resolve_normal_ct(struct sk_buff *skb,
}
unsigned int
-nf_conntrack_in(int pf, unsigned int hooknum, struct sk_buff *skb)
+nf_conntrack_in(struct net *net, int pf, unsigned int hooknum, struct sk_buff *skb)
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
@@ -704,7 +704,7 @@ nf_conntrack_in(int pf, unsigned int hooknum, struct sk_buff *skb)
return -ret;
}
- ct = resolve_normal_ct(skb, dataoff, pf, protonum, l3proto, l4proto,
+ ct = resolve_normal_ct(net, skb, dataoff, pf, protonum, l3proto, l4proto,
&set_reply, &ctinfo);
if (!ct) {
/* Not valid part of a connection */
--
1.5.4.5
--
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