[NETFILTER]: Avoid skb_copy/pskb_copy/skb_realloc_headroom

[net-next-2.6.git] / net / netfilter / xt_TCPMSS.c

diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c
index 31b6f9d0982277826393248e28f1265ae5476c7a..f111edf5f7754516a7743bae3064958ad0010d65 100644 (file)
--- a/net/netfilter/xt_TCPMSS.c
+++ b/net/netfilter/xt_TCPMSS.c
@@ -105,14 +105,10 @@ tcpmss_mangle_packet(struct sk_buff **pskb,
         * MSS Option not found ?! add it..
         */
        if (skb_tailroom((*pskb)) < TCPOLEN_MSS) {
-               struct sk_buff *newskb;
-
-               newskb = skb_copy_expand(*pskb, skb_headroom(*pskb),
-                                        TCPOLEN_MSS, GFP_ATOMIC);
-               if (!newskb)
+               if (pskb_expand_head(*pskb, 0,
+                                    TCPOLEN_MSS - skb_tailroom(*pskb),
+                                    GFP_ATOMIC))
                        return -1;
-               kfree_skb(*pskb);
-               *pskb = newskb;
                tcph = (struct tcphdr *)(skb_network_header(*pskb) + tcphoff);
        }