netfilter: conntrack: compute l3proto nla size at compile time

avoids a pointer and allows struct to be const later on.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 8 insertions, 11 deletions

diff --git a/include/net/netfilter/nf_conntrack_l3proto.h b/include/net/netfilter/nf_conntrack_l3proto.h
index 1b8de16..6a27ffe 100644
--- a/include/net/netfilter/nf_conntrack_l3proto.h
+++ b/include/net/netfilter/nf_conntrack_l3proto.h
@@ -20,6 +20,9 @@ struct nf_conntrack_l3proto {
 	/* L3 Protocol Family number. ex) PF_INET */
 	u_int16_t l3proto;
 
+	/* size of tuple nlattr, fills a hole */
+	u16 nla_size;
+
 	/* Protocol name */
 	const char *name;
 
@@ -49,23 +52,17 @@ struct nf_conntrack_l3proto {
 	int (*get_l4proto)(const struct sk_buff *skb, unsigned int nhoff,
 			   unsigned int *dataoff, u_int8_t *protonum);
 
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 	int (*tuple_to_nlattr)(struct sk_buff *skb,
 			       const struct nf_conntrack_tuple *t);
-
-	/* Called when netns wants to use connection tracking */
-	int (*net_ns_get)(struct net *);
-	void (*net_ns_put)(struct net *);
-
-	/*
-	 * Calculate size of tuple nlattr
-	 */
-	int (*nlattr_tuple_size)(void);
-
 	int (*nlattr_to_tuple)(struct nlattr *tb[],
 			       struct nf_conntrack_tuple *t);
 	const struct nla_policy *nla_policy;
+#endif
 
-	size_t nla_size;
+	/* Called when netns wants to use connection tracking */
+	int (*net_ns_get)(struct net *);
+	void (*net_ns_put)(struct net *);
 
 	/* Module (if any) which this is connected to. */
 	struct module *me;