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authorHerbert Xu <herbert@gondor.apana.org.au>2007-10-14 11:39:55 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-15 23:26:28 +0400
commit2ca7b0ac022aa0158599178fe1056b1ba9ec8b97 (patch)
tree6eece25447f0ec3b5d5f5533e49e10fde4d59f35 /net/ipv6
parentaf1e1cf073e3d038b7aac417a20585ecdcab7de6 (diff)
downloadlinux-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/ipv6')
-rw-r--r--net/ipv6/netfilter/ip6_queue.c18
1 files changed, 6 insertions, 12 deletions
diff --git a/net/ipv6/netfilter/ip6_queue.c b/net/ipv6/netfilter/ip6_queue.c
index d7080dd475ac..6413a30d9f68 100644
--- a/net/ipv6/netfilter/ip6_queue.c
+++ b/net/ipv6/netfilter/ip6_queue.c
@@ -332,6 +332,7 @@ static int
ipq_mangle_ipv6(ipq_verdict_msg_t *v, struct ipq_queue_entry *e)
{
int diff;
+ int err;
struct ipv6hdr *user_iph = (struct ipv6hdr *)v->payload;
if (v->data_len < sizeof(*user_iph))
@@ -344,21 +345,14 @@ ipq_mangle_ipv6(ipq_verdict_msg_t *v, struct ipq_queue_entry *e)
if (v->data_len > 0xFFFF)
return -EINVAL;
if (diff > skb_tailroom(e->skb)) {
- struct sk_buff *newskb;
-
- newskb = skb_copy_expand(e->skb,
- skb_headroom(e->skb),
- diff,
- GFP_ATOMIC);
- if (newskb == NULL) {
+ err = pskb_expand_head(e->skb, 0,
+ diff - skb_tailroom(e->skb),
+ GFP_ATOMIC);
+ if (err) {
printk(KERN_WARNING "ip6_queue: OOM "
"in mangle, dropping packet\n");
- return -ENOMEM;
+ return err;
}
- if (e->skb->sk)
- skb_set_owner_w(newskb, e->skb->sk);
- kfree_skb(e->skb);
- e->skb = newskb;
}
skb_put(e->skb, diff);
}