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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2007-10-14 00:39:55 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-15 12:26:28 -0700 |
| commit | 2ca7b0ac022aa0158599178fe1056b1ba9ec8b97 (patch) | |
| tree | 6eece25447f0ec3b5d5f5533e49e10fde4d59f35 /net/ipv4/netfilter.c | |
| parent | af1e1cf073e3d038b7aac417a20585ecdcab7de6 (diff) | |
| download | linux-2ca7b0ac022aa0158599178fe1056b1ba9ec8b97.tar.gz linux-2ca7b0ac022aa0158599178fe1056b1ba9ec8b97.tar.xz | |
[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.c | 31 |
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); |