On Wed, 2013-07-31 at 03:21 +0000, Cong Wang wrote:

On Wed, 31 Jul 2013 at 00:55 GMT, Eric Dumazet [off-list ref] wrote:

quoted

diff --git a/include/net/sock.h b/include/net/sock.h
index b9f2b09..53d4714 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h

@@ -1520,6 +1520,7 @@ extern struct sk_buff		*sock_rmalloc(struct sock *sk,
 					      unsigned long size, int force,
 					      gfp_t priority);
 extern void			sock_wfree(struct sk_buff *skb);
+extern void			skb_orphan_partial(struct sk_buff *skb);
 extern void			sock_rfree(struct sk_buff *skb);
 extern void			sock_edemux(struct sk_buff *skb);
 

diff --git a/net/core/sock.c b/net/core/sock.c
index 85e8de1..a753d97 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c

@@ -1576,6 +1576,25 @@ void sock_wfree(struct sk_buff *skb)
 }
 EXPORT_SYMBOL(sock_wfree);
 
+void skb_orphan_partial(struct sk_buff *skb)

I think net/core/skbuff.c is a better place to put this (or skbuff.h
if it can be inlined).

I put it right after sock_wfree() because this stuff really has to make
the same thing than sock_wfree().

I do not want to inline it because EXPORTing tcp_wfree() looks ugly.