Commit 729e72a1 authored Nov 02, 2011 by stephen hemminger Committed by David S. Miller Nov 04, 2011

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 618e1b74
Author: Arnd Bergmann <arnd@arndb.de>
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 <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 5ae7fa06

drivers/net/macvlan.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}

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