[NETFILTER]: nf_conntrack: add __nf_copy() to copy members in skb

This unifies the codes to copy netfilter related datas. Note that
__nf_copy() assumes destination skb doesn't have any netfilter
related members.

Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 39a6da243b24..62ab1ab07028 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1498,8 +1498,25 @@ static inline void nf_reset(struct sk_buff *skb)
 #endif
 }
 
+/* Note: This doesn't put any conntrack and bridge info in dst. */
+static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src)
+{
+        dst->nfct = src->nfct;
+        nf_conntrack_get(src->nfct);
+        dst->nfctinfo = src->nfctinfo;
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+        dst->nfct_reasm = src->nfct_reasm;
+        nf_conntrack_get_reasm(src->nfct_reasm);
+#endif
+#ifdef CONFIG_BRIDGE_NETFILTER
+        dst->nf_bridge  = src->nf_bridge;
+        nf_bridge_get(src->nf_bridge);
+#endif
+}
+
 #else /* CONFIG_NETFILTER */
 static inline void nf_reset(struct sk_buff *skb) {}
+static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src) {}
 #endif /* CONFIG_NETFILTER */
 
 #ifdef CONFIG_NETWORK_SECMARK