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authorAlexey Dobriyan <adobriyan@sw.ru>2008-04-14 09:56:02 +0200
committerPatrick McHardy <kaber@trash.net>2008-04-14 09:56:02 +0200
commit666953df353194bef76086fa3f126241cbac3e3a (patch)
treebd69afed2996b0a521361efcd29e32ea7606e9ff /include/linux
parent36e2a1b0f7f2598e38952494b91490f58aa221c8 (diff)
[NETFILTER]: ip_tables: per-netns FILTER/MANGLE/RAW tables for real
Commit 9335f047fe61587ec82ff12fbb1220bcfdd32006 aka "[NETFILTER]: ip_tables: per-netns FILTER, MANGLE, RAW" added per-netns _view_ of iptables rules. They were shown to user, but ignored by filtering code. Now that it's possible to at least ping loopback, per-netns tables can affect filtering decisions. netns is taken in case of PRE_ROUTING, LOCAL_IN -- from in device, POST_ROUTING, LOCAL_OUT -- from out device, FORWARD -- from in device which should be equal to out device's netns. This code is relatively new, so BUG_ON was plugged. Wrappers were added to a) keep code the same from CONFIG_NET_NS=n users (overwhelming majority), b) consolidate code in one place -- similar changes will be done in ipv6 and arp netfilter code. Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/netfilter.h54
1 files changed, 53 insertions, 1 deletions
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 89e6c72ad29..66bc52060fd 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -6,11 +6,13 @@
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/net.h>
+#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/wait.h>
#include <linux/list.h>
+#include <net/net_namespace.h>
#endif
#include <linux/compiler.h>
@@ -76,7 +78,6 @@ extern void netfilter_init(void);
#define NF_MAX_HOOKS 8
struct sk_buff;
-struct net_device;
typedef unsigned int nf_hookfn(unsigned int hooknum,
struct sk_buff *skb,
@@ -320,5 +321,56 @@ extern void (*nf_ct_destroy)(struct nf_conntrack *);
static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
#endif
+static inline struct net *nf_pre_routing_net(const struct net_device *in,
+ const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+ return in->nd_net;
+#else
+ return &init_net;
+#endif
+}
+
+static inline struct net *nf_local_in_net(const struct net_device *in,
+ const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+ return in->nd_net;
+#else
+ return &init_net;
+#endif
+}
+
+static inline struct net *nf_forward_net(const struct net_device *in,
+ const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+ BUG_ON(in->nd_net != out->nd_net);
+ return in->nd_net;
+#else
+ return &init_net;
+#endif
+}
+
+static inline struct net *nf_local_out_net(const struct net_device *in,
+ const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+ return out->nd_net;
+#else
+ return &init_net;
+#endif
+}
+
+static inline struct net *nf_post_routing_net(const struct net_device *in,
+ const struct net_device *out)
+{
+#ifdef CONFIG_NET_NS
+ return out->nd_net;
+#else
+ return &init_net;
+#endif
+}
+
#endif /*__KERNEL__*/
#endif /*__LINUX_NETFILTER_H*/