[NETFILTER]: Keep conntrack/nat protocols in array instead of linked list

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 23 insertions, 15 deletions

diff --git a/include/linux/netfilter_ipv4/ip_conntrack_core.h b/include/linux/netfilter_ipv4/ip_conntrack_core.h
index 0acb025c5422..bb9b11c680ac 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_core.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_core.h
@@ -16,10 +16,6 @@ extern int ip_conntrack_init(void);
 extern void ip_conntrack_cleanup(void);
 
 struct ip_conntrack_protocol;
-extern struct ip_conntrack_protocol *ip_ct_find_proto(u_int8_t protocol);
-/* Like above, but you already have conntrack read lock. */
-extern struct ip_conntrack_protocol *__ip_ct_find_proto(u_int8_t protocol);
-extern struct list_head protocol_list;
 
 extern int
 ip_ct_get_tuple(const struct iphdr *iph,
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_protocol.h b/include/linux/netfilter_ipv4/ip_conntrack_protocol.h
index f53a126ade1e..0ff067b3fdb0 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_protocol.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_protocol.h
@@ -7,9 +7,6 @@ struct seq_file;
 
 struct ip_conntrack_protocol
 {
-	/* Next pointer. */
-	struct list_head list;
-
 	/* Protocol number. */
 	u_int8_t proto;
 
@@ -58,14 +55,23 @@ struct ip_conntrack_protocol
 	struct module *me;
 };
 
+#define MAX_IP_CT_PROTO 256
+extern struct ip_conntrack_protocol *ip_ct_protos[MAX_IP_CT_PROTO];
+
 /* Protocol registration. */
 extern int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto);
 extern void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto);
 
+static inline struct ip_conntrack_protocol *ip_ct_find_proto(u_int8_t protocol)
+{
+	return ip_ct_protos[protocol];
+}
+
 /* Existing built-in protocols */
 extern struct ip_conntrack_protocol ip_conntrack_protocol_tcp;
 extern struct ip_conntrack_protocol ip_conntrack_protocol_udp;
 extern struct ip_conntrack_protocol ip_conntrack_protocol_icmp;
+extern struct ip_conntrack_protocol ip_conntrack_generic_protocol;
 extern int ip_conntrack_protocol_tcp_init(void);
 
 /* Log invalid packets */
diff --git a/include/linux/netfilter_ipv4/ip_nat_core.h b/include/linux/netfilter_ipv4/ip_nat_core.h
index a8bcdc9874a5..4f01f882f2fc 100644
--- a/include/linux/netfilter_ipv4/ip_nat_core.h
+++ b/include/linux/netfilter_ipv4/ip_nat_core.h
@@ -14,8 +14,6 @@ extern unsigned int do_bindings(struct ip_conntrack *ct,
 				unsigned int hooknum,
 				struct sk_buff **pskb);
 
-extern struct list_head protos;
-
 extern int icmp_reply_translation(struct sk_buff **pskb,
 				  struct ip_conntrack *conntrack,
 				  unsigned int hooknum,
@@ -26,8 +24,4 @@ extern void replace_in_hashes(struct ip_conntrack *conntrack,
 extern void place_in_hashes(struct ip_conntrack *conntrack,
 			    struct ip_nat_info *info);
 
-/* Built-in protocols. */
-extern struct ip_nat_protocol ip_nat_protocol_tcp;
-extern struct ip_nat_protocol ip_nat_protocol_udp;
-extern struct ip_nat_protocol ip_nat_protocol_icmp;
 #endif /* _IP_NAT_CORE_H */
diff --git a/include/linux/netfilter_ipv4/ip_nat_protocol.h b/include/linux/netfilter_ipv4/ip_nat_protocol.h
index 998ab2bd325c..e81795806ee3 100644
--- a/include/linux/netfilter_ipv4/ip_nat_protocol.h
+++ b/include/linux/netfilter_ipv4/ip_nat_protocol.h
@@ -9,8 +9,6 @@ struct ip_nat_range;
 
 struct ip_nat_protocol
 {
-	struct list_head list;
-
 	/* Protocol name */
 	const char *name;
 
@@ -47,10 +45,24 @@ struct ip_nat_protocol
 				    const struct ip_nat_range *range);
 };
 
+#define MAX_IP_NAT_PROTO 256
+extern struct ip_nat_protocol *ip_nat_protos[MAX_IP_NAT_PROTO];
+
 /* Protocol registration. */
 extern int ip_nat_protocol_register(struct ip_nat_protocol *proto);
 extern void ip_nat_protocol_unregister(struct ip_nat_protocol *proto);
 
+static inline struct ip_nat_protocol *ip_nat_find_proto(u_int8_t protocol)
+{
+	return ip_nat_protos[protocol];
+}
+
+/* Built-in protocols. */
+extern struct ip_nat_protocol ip_nat_protocol_tcp;
+extern struct ip_nat_protocol ip_nat_protocol_udp;
+extern struct ip_nat_protocol ip_nat_protocol_icmp;
+extern struct ip_nat_protocol ip_nat_unknown_protocol;
+
 extern int init_protocols(void) __init;
 extern void cleanup_protocols(void);
 extern struct ip_nat_protocol *find_nat_proto(u_int16_t protonum);