linux-kernel - [ 010/104] macvlan: Set IFF_UNICAST_FLT flag to prevent unnecessary promisc mode.

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Message-Id: <20130325010525.328988649@decadent.org.uk>
Date:	Mon, 25 Mar 2013 01:05:34 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	akpm@...ux-foundation.org, Vlad Yasevich <vyasevic@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 010/104] macvlan: Set IFF_UNICAST_FLT flag to prevent  unnecessary promisc mode.

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vlad Yasevich <vyasevic@...hat.com>

[ Upstream commit 87ab7f6f2874f1115817e394a7ed2dea1c72549e ]

Macvlan already supports hw address filters.  Set the IFF_UNICAST_FLT
so that it doesn't needlesly enter PROMISC mode when macvlans are
stacked.

Signed-of-by: Vlad Yasevich <vyasevic@...hat.com>

Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/macvlan.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -585,6 +585,7 @@ void macvlan_common_setup(struct net_dev
 	ether_setup(dev);
 
 	dev->priv_flags	       &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
+	dev->priv_flags	       |= IFF_UNICAST_FLT;
 	dev->netdev_ops		= &macvlan_netdev_ops;
 	dev->destructor		= free_netdev;
 	dev->header_ops		= &macvlan_hard_header_ops,


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