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Diffstat (limited to 'include')
-rw-r--r--include/linux/netfilter.h26
1 files changed, 21 insertions, 5 deletions
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 857f5026ced..b809265607d 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -162,6 +162,24 @@ extern struct ctl_path nf_net_ipv4_netfilter_sysctl_path[];
extern struct list_head nf_hooks[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
+#if defined(CONFIG_JUMP_LABEL)
+#include <linux/jump_label.h>
+extern struct jump_label_key nf_hooks_needed[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
+static inline bool nf_hooks_active(u_int8_t pf, unsigned int hook)
+{
+ if (__builtin_constant_p(pf) &&
+ __builtin_constant_p(hook))
+ return static_branch(&nf_hooks_needed[pf][hook]);
+
+ return !list_empty(&nf_hooks[pf][hook]);
+}
+#else
+static inline bool nf_hooks_active(u_int8_t pf, unsigned int hook)
+{
+ return !list_empty(&nf_hooks[pf][hook]);
+}
+#endif
+
int nf_hook_slow(u_int8_t pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev, struct net_device *outdev,
int (*okfn)(struct sk_buff *), int thresh);
@@ -179,11 +197,9 @@ static inline int nf_hook_thresh(u_int8_t pf, unsigned int hook,
struct net_device *outdev,
int (*okfn)(struct sk_buff *), int thresh)
{
-#ifndef CONFIG_NETFILTER_DEBUG
- if (list_empty(&nf_hooks[pf][hook]))
- return 1;
-#endif
- return nf_hook_slow(pf, hook, skb, indev, outdev, okfn, thresh);
+ if (nf_hooks_active(pf, hook))
+ return nf_hook_slow(pf, hook, skb, indev, outdev, okfn, thresh);
+ return 1;
}
static inline int nf_hook(u_int8_t pf, unsigned int hook, struct sk_buff *skb,