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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/bridge | |
| parent | af1e1cf073e3d038b7aac417a20585ecdcab7de6 (diff) | |
| download | op-kernel-dev-2ca7b0ac022aa0158599178fe1056b1ba9ec8b97.zip op-kernel-dev-2ca7b0ac022aa0158599178fe1056b1ba9ec8b97.tar.gz | |
[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/bridge')
| -rw-r--r-- | net/bridge/netfilter/ebt_dnat.c | 13 | ||||
| -rw-r--r-- | net/bridge/netfilter/ebt_redirect.c | 13 | ||||
| -rw-r--r-- | net/bridge/netfilter/ebt_snat.c | 13 |
3 files changed, 9 insertions, 30 deletions
diff --git a/net/bridge/netfilter/ebt_dnat.c b/net/bridge/netfilter/ebt_dnat.c index 4582659..9d74dee 100644 --- a/net/bridge/netfilter/ebt_dnat.c +++ b/net/bridge/netfilter/ebt_dnat.c @@ -8,6 +8,7 @@ * */ +#include <linux/netfilter.h> #include <linux/netfilter_bridge/ebtables.h> #include <linux/netfilter_bridge/ebt_nat.h> #include <linux/module.h> @@ -19,17 +20,9 @@ static int ebt_target_dnat(struct sk_buff **pskb, unsigned int hooknr, { struct ebt_nat_info *info = (struct ebt_nat_info *)data; - if (skb_shared(*pskb) || skb_cloned(*pskb)) { - struct sk_buff *nskb; + if (skb_make_writable(*pskb, 0)) + return NF_DROP; - nskb = skb_copy(*pskb, GFP_ATOMIC); - if (!nskb) - return NF_DROP; - if ((*pskb)->sk) - skb_set_owner_w(nskb, (*pskb)->sk); - kfree_skb(*pskb); - *pskb = nskb; - } memcpy(eth_hdr(*pskb)->h_dest, info->mac, ETH_ALEN); return info->target; } diff --git a/net/bridge/netfilter/ebt_redirect.c b/net/bridge/netfilter/ebt_redirect.c index 9f378ea..81371cd 100644 --- a/net/bridge/netfilter/ebt_redirect.c +++ b/net/bridge/netfilter/ebt_redirect.c @@ -8,6 +8,7 @@ * */ +#include <linux/netfilter.h> #include <linux/netfilter_bridge/ebtables.h> #include <linux/netfilter_bridge/ebt_redirect.h> #include <linux/module.h> @@ -20,17 +21,9 @@ static int ebt_target_redirect(struct sk_buff **pskb, unsigned int hooknr, { struct ebt_redirect_info *info = (struct ebt_redirect_info *)data; - if (skb_shared(*pskb) || skb_cloned(*pskb)) { - struct sk_buff *nskb; + if (skb_make_writable(*pskb, 0)) + return NF_DROP; - nskb = skb_copy(*pskb, GFP_ATOMIC); - if (!nskb) - return NF_DROP; - if ((*pskb)->sk) - skb_set_owner_w(nskb, (*pskb)->sk); - kfree_skb(*pskb); - *pskb = nskb; - } if (hooknr != NF_BR_BROUTING) memcpy(eth_hdr(*pskb)->h_dest, in->br_port->br->dev->dev_addr, ETH_ALEN); diff --git a/net/bridge/netfilter/ebt_snat.c b/net/bridge/netfilter/ebt_snat.c index a507221..b0c6368 100644 --- a/net/bridge/netfilter/ebt_snat.c +++ b/net/bridge/netfilter/ebt_snat.c @@ -8,6 +8,7 @@ * */ +#include <linux/netfilter.h> #include <linux/netfilter_bridge/ebtables.h> #include <linux/netfilter_bridge/ebt_nat.h> #include <linux/module.h> @@ -21,17 +22,9 @@ static int ebt_target_snat(struct sk_buff **pskb, unsigned int hooknr, { struct ebt_nat_info *info = (struct ebt_nat_info *) data; - if (skb_shared(*pskb) || skb_cloned(*pskb)) { - struct sk_buff *nskb; + if (skb_make_writable(*pskb, 0)) + return NF_DROP; - nskb = skb_copy(*pskb, GFP_ATOMIC); - if (!nskb) - return NF_DROP; - if ((*pskb)->sk) - skb_set_owner_w(nskb, (*pskb)->sk); - kfree_skb(*pskb); - *pskb = nskb; - } memcpy(eth_hdr(*pskb)->h_source, info->mac, ETH_ALEN); if (!(info->target & NAT_ARP_BIT) && eth_hdr(*pskb)->h_proto == htons(ETH_P_ARP)) { |
