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authorStephen Hemminger <shemminger@osdl.org>2006-05-25 15:10:02 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-17 21:26:06 -0700
commit8f182b494f87799d6ae20a1401825c516da46081 (patch)
tree509fc735e59cb1094cd68029a9e0a4b9a9a01e86
parent[LLC]: use rcu_dereference on receive handler (diff)
downloadlinux-dev-8f182b494f87799d6ae20a1401825c516da46081.tar.xz
linux-dev-8f182b494f87799d6ae20a1401825c516da46081.zip
[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 <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/llc/llc_input.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c
index cb9f7f058f75..32cf8ac8ea80 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]))