netfilter: conntrack: un-inline nf_ct_ecache_ext_add

Only called when new ct is allocated or the extension isn't present.
This function will be extended, place this in the conntrack module
instead of inlining.

The callers already depend on nf_conntrack module.
Return value is changed to bool, noone used the returned pointer.

Make sure that the core drops the newly allocated conntrack
if the extension is requested but can't be added.
This makes it necessary to ifdef the section, as the stub
always returns false we'd drop every new conntrack if the
the ecache extension is disabled in kconfig.

Add from data path (xt_CT, nft_ct) is unchanged.

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

1 files changed, 5 insertions, 25 deletions

diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h
index b57d73785e4d..2e3d58439e34 100644
--- a/include/net/netfilter/nf_conntrack_ecache.h
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -36,31 +36,6 @@ nf_ct_ecache_find(const struct nf_conn *ct)
 #endif
 }
 
-static inline struct nf_conntrack_ecache *
-nf_ct_ecache_ext_add(struct nf_conn *ct, u16 ctmask, u16 expmask, gfp_t gfp)
-{
-#ifdef CONFIG_NF_CONNTRACK_EVENTS
-	struct net *net = nf_ct_net(ct);
-	struct nf_conntrack_ecache *e;
-
-	if (!ctmask && !expmask && net->ct.sysctl_events) {
-		ctmask = ~0;
-		expmask = ~0;
-	}
-	if (!ctmask && !expmask)
-		return NULL;
-
-	e = nf_ct_ext_add(ct, NF_CT_EXT_ECACHE, gfp);
-	if (e) {
-		e->ctmask  = ctmask;
-		e->expmask = expmask;
-	}
-	return e;
-#else
-	return NULL;
-#endif
-}
-
 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 
 /* This structure is passed to event handler */
@@ -89,6 +64,7 @@ void nf_ct_deliver_cached_events(struct nf_conn *ct);
 int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
 				  u32 portid, int report);
 
+bool nf_ct_ecache_ext_add(struct nf_conn *ct, u16 ctmask, u16 expmask, gfp_t gfp);
 #else
 
 static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct)
@@ -103,6 +79,10 @@ static inline int nf_conntrack_eventmask_report(unsigned int eventmask,
 	return 0;
 }
 
+static inline bool nf_ct_ecache_ext_add(struct nf_conn *ct, u16 ctmask, u16 expmask, gfp_t gfp)
+{
+	return false;
+}
 #endif
 
 static inline void