[NETFILTER]: x_tables: add TRACE target

The TRACE target can be used to follow IP and IPv6 packets through
the ruleset.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Patrick NcHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 6a41b96b3d37..0583e8498f13 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -428,6 +428,10 @@ struct sk_buff *skb_clone(struct sk_buff *skb, gfp_t gfp_mask)
         n->destructor = NULL;
         C(mark);
         __nf_copy(n, skb);
+#if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
+    defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE)
+        C(nf_trace);
+#endif
 #ifdef CONFIG_NET_SCHED
         C(tc_index);
 #ifdef CONFIG_NET_CLS_ACT
@@ -485,6 +489,10 @@ static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
         new->destructor = NULL;
         new->mark       = old->mark;
         __nf_copy(new, old);
+#if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
+    defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE)
+        new->nf_trace   = old->nf_trace;
+#endif
 #if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
         new->ipvs_property = old->ipvs_property;
 #endif