This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / net / netfilter / nf_conntrack_ecache.h

diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h
new file mode 100644 (file)
index 0000000..b62a8a9
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -0,0 +1,95 @@
+/*
+ * connection tracking event cache.
+ */
+
+#ifndef _NF_CONNTRACK_ECACHE_H
+#define _NF_CONNTRACK_ECACHE_H
+#include <net/netfilter/nf_conntrack.h>
+
+#include <linux/notifier.h>
+#include <linux/interrupt.h>
+#include <net/netfilter/nf_conntrack_expect.h>
+
+#ifdef CONFIG_NF_CONNTRACK_EVENTS
+struct nf_conntrack_ecache {
+       struct nf_conn *ct;
+       unsigned int events;
+};
+DECLARE_PER_CPU(struct nf_conntrack_ecache, nf_conntrack_ecache);
+
+#define CONNTRACK_ECACHE(x)    (__get_cpu_var(nf_conntrack_ecache).x)
+
+extern struct atomic_notifier_head nf_conntrack_chain;
+extern struct atomic_notifier_head nf_conntrack_expect_chain;
+
+static inline int nf_conntrack_register_notifier(struct notifier_block *nb)
+{
+       return atomic_notifier_chain_register(&nf_conntrack_chain, nb);
+}
+
+static inline int nf_conntrack_unregister_notifier(struct notifier_block *nb)
+{
+       return atomic_notifier_chain_unregister(&nf_conntrack_chain, nb);
+}
+
+static inline int
+nf_conntrack_expect_register_notifier(struct notifier_block *nb)
+{
+       return atomic_notifier_chain_register(&nf_conntrack_expect_chain, nb);
+}
+
+static inline int
+nf_conntrack_expect_unregister_notifier(struct notifier_block *nb)
+{
+       return atomic_notifier_chain_unregister(&nf_conntrack_expect_chain,
+                       nb);
+}
+
+extern void nf_ct_deliver_cached_events(const struct nf_conn *ct);
+extern void __nf_ct_event_cache_init(struct nf_conn *ct);
+extern void nf_ct_event_cache_flush(void);
+
+static inline void
+nf_conntrack_event_cache(enum ip_conntrack_events event,
+                        const struct sk_buff *skb)
+{
+       struct nf_conn *ct = (struct nf_conn *)skb->nfct;
+       struct nf_conntrack_ecache *ecache;
+
+       local_bh_disable();
+       ecache = &__get_cpu_var(nf_conntrack_ecache);
+       if (ct != ecache->ct)
+               __nf_ct_event_cache_init(ct);
+       ecache->events |= event;
+       local_bh_enable();
+}
+
+static inline void nf_conntrack_event(enum ip_conntrack_events event,
+                                     struct nf_conn *ct)
+{
+       if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct))
+               atomic_notifier_call_chain(&nf_conntrack_chain, event, ct);
+}
+
+static inline void
+nf_conntrack_expect_event(enum ip_conntrack_expect_events event,
+                         struct nf_conntrack_expect *exp)
+{
+       atomic_notifier_call_chain(&nf_conntrack_expect_chain, event, exp);
+}
+
+#else /* CONFIG_NF_CONNTRACK_EVENTS */
+
+static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
+                                           const struct sk_buff *skb) {}
+static inline void nf_conntrack_event(enum ip_conntrack_events event,
+                                     struct nf_conn *ct) {}
+static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {}
+static inline void
+nf_conntrack_expect_event(enum ip_conntrack_expect_events event,
+                         struct nf_conntrack_expect *exp) {}
+static inline void nf_ct_event_cache_flush(void) {}
+#endif /* CONFIG_NF_CONNTRACK_EVENTS */
+
+#endif /*_NF_CONNTRACK_ECACHE_H*/
+