From: Stephen Hemminger Date: Thu, 25 May 2006 22:10:02 +0000 (-0700) Subject: [LLC]: allow applications to get copy of kernel datagrams X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8f182b494f87799d6ae20a1401825c516da46081;p=mv-sheeva.git [LLC]: allow applications to get copy of kernel datagrams It is legal for an application to bind to a SAP that is also being used by the kernel. This happens if the bridge module binds to the STP SAP, and the user wants to have a daemon for STP as well. It is possible to have kernel doing STP on one bridge, but let application do RSTP on another bridge. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c index cb9f7f058f7..32cf8ac8ea8 100644 --- a/net/llc/llc_input.c +++ b/net/llc/llc_input.c @@ -173,8 +173,10 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev, */ rcv = rcu_dereference(sap->rcv_func); if (rcv) { + struct sk_buff *cskb = skb_clone(skb, GFP_ATOMIC); + if (cskb) + rcv(cskb, dev, pt, orig_dev); rcv(skb, dev, pt, orig_dev); - goto out_put; } dest = llc_pdu_type(skb); if (unlikely(!dest || !llc_type_handlers[dest - 1]))