skbuff: Move new code into __copy_skb_header
Hi:
skbuff: Move new __skb_clone code into __copy_skb_header
It seems that people just keep on adding stuff to __skb_clone
instead __copy_skb_header. This is wrong as it means your brand-new
attributes won't always get copied as you intended.
This patch moves them to the right place, and adds a comment to
prevent this from happening again.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Thanks,
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index d152394..e47afb2 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -538,6 +538,7 @@
#endif
new->protocol = old->protocol;
new->mark = old->mark;
+ new->iif = old->iif;
__nf_copy(new, old);
#if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE)
@@ -550,10 +551,18 @@
#endif
#endif
new->vlan_tci = old->vlan_tci;
+#if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
+ new->do_not_encrypt = old->do_not_encrypt;
+ new->requeue = old->requeue;
+#endif
skb_copy_secmark(new, old);
}
+/*
+ * You should not add any new code to this function. Add it to
+ * __copy_skb_header above instead.
+ */
static struct sk_buff *__skb_clone(struct sk_buff *n, struct sk_buff *skb)
{
#define C(x) n->x = skb->x
@@ -569,16 +578,11 @@
n->cloned = 1;
n->nohdr = 0;
n->destructor = NULL;
- C(iif);
C(tail);
C(end);
C(head);
C(data);
C(truesize);
-#if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
- C(do_not_encrypt);
- C(requeue);
-#endif
atomic_set(&n->users, 1);
atomic_inc(&(skb_shinfo(skb)->dataref));