From 82c49a352e0fd7af7e79a922b863f33f619f3209 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Fri, 22 May 2009 22:11:37 +0000 Subject: [PATCH] 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 Thanks, Signed-off-by: David S. Miller --- net/core/skbuff.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index d152394b2611..e47afb20b894 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -538,6 +538,7 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old) #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 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old) #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 @@ static struct sk_buff *__skb_clone(struct sk_buff *n, struct sk_buff *skb) 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)); -- 2.39.5