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

This unifies the codes to copy netfilter related datas. Before copying,
nf_copy() puts original members in destination skb.

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, 1 insertions, 12 deletions

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 11029b9d4cf7..11ab100d6c6c 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -384,21 +384,10 @@ static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
 #ifdef CONFIG_NET_SCHED
         to->tc_index = from->tc_index;
 #endif
-#ifdef CONFIG_NETFILTER
-        /* Connection association is same as pre-frag packet */
-        nf_conntrack_put(to->nfct);
-        to->nfct = from->nfct;
-        nf_conntrack_get(to->nfct);
-        to->nfctinfo = from->nfctinfo;
+        nf_copy(to, from);
 #if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
         to->ipvs_property = from->ipvs_property;
 #endif
-#ifdef CONFIG_BRIDGE_NETFILTER
-        nf_bridge_put(to->nf_bridge);
-        to->nf_bridge = from->nf_bridge;
-        nf_bridge_get(to->nf_bridge);
-#endif
-#endif
         skb_copy_secmark(to, from);
 }