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authorHerbert Xu <herbert@gondor.apana.org.au>2007-10-14 00:39:55 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-15 12:26:28 -0700
commit2ca7b0ac022aa0158599178fe1056b1ba9ec8b97 (patch)
tree6eece25447f0ec3b5d5f5533e49e10fde4d59f35 /net/ipv4/netfilter.c
parent[IPVS]: Replace local version of skb_make_writable (diff)
downloadlinux-dev-2ca7b0ac022aa0158599178fe1056b1ba9ec8b97.tar.xz
linux-dev-2ca7b0ac022aa0158599178fe1056b1ba9ec8b97.zip
[NETFILTER]: Avoid skb_copy/pskb_copy/skb_realloc_headroom
This patch replaces unnecessary uses of skb_copy, pskb_copy and skb_realloc_headroom by functions such as skb_make_writable and pskb_expand_head. This allows us to remove the double pointers later. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/netfilter.c')
-rw-r--r--net/ipv4/netfilter.c31
1 files changed, 9 insertions, 22 deletions
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index b44192924f95..d1e3012d891f 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -3,6 +3,7 @@
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/ip.h>
+#include <linux/skbuff.h>
#include <net/route.h>
#include <net/xfrm.h>
#include <net/ip.h>
@@ -66,17 +67,10 @@ int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type)
/* Change in oif may mean change in hh_len. */
hh_len = (*pskb)->dst->dev->hard_header_len;
- if (skb_headroom(*pskb) < hh_len) {
- struct sk_buff *nskb;
-
- nskb = skb_realloc_headroom(*pskb, hh_len);
- if (!nskb)
- return -1;
- if ((*pskb)->sk)
- skb_set_owner_w(nskb, (*pskb)->sk);
- kfree_skb(*pskb);
- *pskb = nskb;
- }
+ if (skb_headroom(*pskb) < hh_len &&
+ pskb_expand_head(*pskb, hh_len - skb_headroom(*pskb), 0,
+ GFP_ATOMIC))
+ return -1;
return 0;
}
@@ -107,17 +101,10 @@ int ip_xfrm_me_harder(struct sk_buff **pskb)
/* Change in oif may mean change in hh_len. */
hh_len = (*pskb)->dst->dev->hard_header_len;
- if (skb_headroom(*pskb) < hh_len) {
- struct sk_buff *nskb;
-
- nskb = skb_realloc_headroom(*pskb, hh_len);
- if (!nskb)
- return -1;
- if ((*pskb)->sk)
- skb_set_owner_w(nskb, (*pskb)->sk);
- kfree_skb(*pskb);
- *pskb = nskb;
- }
+ if (skb_headroom(*pskb) < hh_len &&
+ pskb_expand_head(*pskb, hh_len - skb_headroom(*pskb), 0,
+ GFP_ATOMIC))
+ return -1;
return 0;
}
EXPORT_SYMBOL(ip_xfrm_me_harder);