From 729e72a10930ef765c11a5a35031ba47f18221c4 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Wed, 2 Nov 2011 12:11:53 +0000 Subject: [PATCH] macvlan: receive multicast with local address When implementing VRRP v2 using macvlan several problems were discovered. VRRP is weird in that all routers participating in a redundant group use the same virtual MAC address. Macvlan is a natural driver to use for this but it doesn't work. The problem is that packets with a macvlan device's source address are not received. The problem is actually a regression that date back almost 2 years now. The original problems started with: commit 618e1b7482f7a8a4c6c6e8ccbe140e4c331df4e9 Author: Arnd Bergmann Date: Thu Nov 26 06:07:10 2009 +0000 macvlan: implement bridge, VEPA and private mode This patches restores the original 2.6.32 behavior. Allowing multicast packets received with the VRRP source address to be received. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- drivers/net/macvlan.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index a3ce3d4561ed..74134970b709 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -192,6 +192,13 @@ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) */ macvlan_broadcast(skb, port, src->dev, MACVLAN_MODE_VEPA); + else { + /* forward to original port. */ + vlan = src; + ret = macvlan_broadcast_one(skb, vlan, eth, 0); + goto out; + } + return RX_HANDLER_PASS; }