X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Fnet%2Fnetfilter%2Fnf_conntrack.h;h=916013ca4a5cab431f5f14da31a19a8f3a83761b;hb=d42510a0f58c2583c37c8e9b7548e3a68545863a;hp=6d075ca16e6eb1cf7b1a7a9e111a39dda0f2e3fd;hpb=d65177c1ae7f085723154105c5dc8d9e16ae8265;p=powerpc.git

diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index 6d075ca16e..916013ca4a 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -67,6 +67,18 @@ do {									\
 
 struct nf_conntrack_helper;
 
+/* nf_conn feature for connections that have a helper */
+struct nf_conn_help {
+	/* Helper. if any */
+	struct nf_conntrack_helper *helper;
+
+	union nf_conntrack_help help;
+
+	/* Current number of expected connections */
+	unsigned int expecting;
+};
+
+
 #include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
 struct nf_conn
 {
@@ -81,6 +93,9 @@ struct nf_conn
 	/* Have we seen traffic both ways yet? (bitset) */
 	unsigned long status;
 
+	/* If we were expected by an expectation, this will be it */
+	struct nf_conn *master;
+
 	/* Timer function; drops refcnt when it goes off. */
 	struct timer_list timeout;
 
@@ -88,38 +103,22 @@ struct nf_conn
 	/* Accounting Information (same cache line as other written members) */
 	struct ip_conntrack_counter counters[IP_CT_DIR_MAX];
 #endif
-	/* If we were expected by an expectation, this will be it */
-	struct nf_conn *master;
-	
-	/* Current number of expected connections */
-	unsigned int expecting;
 
 	/* Unique ID that identifies this conntrack*/
 	unsigned int id;
 
-	/* Helper. if any */
-	struct nf_conntrack_helper *helper;
-
 	/* features - nat, helper, ... used by allocating system */
 	u_int32_t features;
 
-	/* Storage reserved for other modules: */
-
-	union nf_conntrack_proto proto;
-
 #if defined(CONFIG_NF_CONNTRACK_MARK)
 	u_int32_t mark;
 #endif
 
-	/* These members are dynamically allocated. */
-
-	union nf_conntrack_help *help;
+	/* Storage reserved for other modules: */
+	union nf_conntrack_proto proto;
 
-	/* Layer 3 dependent members. (ex: NAT) */
-	union {
-		struct nf_conntrack_ipv4 *ipv4;
-	} l3proto;
-	void *data[0];
+	/* features dynamically at the end: helper, nat (both optional) */
+	char data[0];
 };
 
 struct nf_conntrack_expect
@@ -196,6 +195,10 @@ static inline void nf_ct_put(struct nf_conn *ct)
 	nf_conntrack_put(&ct->ct_general);
 }
 
+/* Protocol module loading */
+extern int nf_ct_l3proto_try_module_get(unsigned short l3proto);
+extern void nf_ct_l3proto_module_put(unsigned short l3proto);
+
 extern struct nf_conntrack_tuple_hash *
 __nf_conntrack_find(const struct nf_conntrack_tuple *tuple,
 		    const struct nf_conn *ignored_conntrack);
@@ -297,29 +300,30 @@ DECLARE_PER_CPU(struct nf_conntrack_ecache, nf_conntrack_ecache);
 
 #define CONNTRACK_ECACHE(x)	(__get_cpu_var(nf_conntrack_ecache).x)
 
-extern struct notifier_block *nf_conntrack_chain;
-extern struct notifier_block *nf_conntrack_expect_chain;
+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 notifier_chain_register(&nf_conntrack_chain, nb);
+	return atomic_notifier_chain_register(&nf_conntrack_chain, nb);
 }
 
 static inline int nf_conntrack_unregister_notifier(struct notifier_block *nb)
 {
-	return notifier_chain_unregister(&nf_conntrack_chain, nb);
+	return atomic_notifier_chain_unregister(&nf_conntrack_chain, nb);
 }
 
 static inline int
 nf_conntrack_expect_register_notifier(struct notifier_block *nb)
 {
-	return notifier_chain_register(&nf_conntrack_expect_chain, nb);
+	return atomic_notifier_chain_register(&nf_conntrack_expect_chain, nb);
 }
 
 static inline int
 nf_conntrack_expect_unregister_notifier(struct notifier_block *nb)
 {
-	return notifier_chain_unregister(&nf_conntrack_expect_chain, nb);
+	return atomic_notifier_chain_unregister(&nf_conntrack_expect_chain,
+			nb);
 }
 
 extern void nf_ct_deliver_cached_events(const struct nf_conn *ct);
@@ -344,14 +348,14 @@ 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))
-		notifier_call_chain(&nf_conntrack_chain, event, 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)
 {
-	notifier_call_chain(&nf_conntrack_expect_chain, event, 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,
@@ -373,10 +377,23 @@ nf_conntrack_expect_event(enum ip_conntrack_expect_events event,
 #define NF_CT_F_NUM	4
 
 extern int
-nf_conntrack_register_cache(u_int32_t features, const char *name, size_t size,
-			    int (*init_conntrack)(struct nf_conn *, u_int32_t));
+nf_conntrack_register_cache(u_int32_t features, const char *name, size_t size);
 extern void
 nf_conntrack_unregister_cache(u_int32_t features);
 
+/* valid combinations:
+ * basic: nf_conn, nf_conn .. nf_conn_help
+ * nat: nf_conn .. nf_conn_nat, nf_conn .. nf_conn_nat, nf_conn help
+ */
+static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct)
+{
+	unsigned int offset = sizeof(struct nf_conn);
+
+	if (!(ct->features & NF_CT_F_HELP))
+		return NULL;
+
+	return (struct nf_conn_help *) ((void *)ct + offset);
+}
+
 #endif /* __KERNEL__ */
 #endif /* _NF_CONNTRACK_H */