netdev - [PATCH net 2/2] macvlan: disable LRO on lower device instead of macvlan

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Message-Id: <dba99240f7c822f062a5aec964324c6e9b69fa05.1383915401.git.mkubecek@suse.cz>
Date:	Fri,  8 Nov 2013 14:41:14 +0100 (CET)
From:	Michal Kubecek <mkubecek@...e.cz>
To:	netdev@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>,
	Patrick McHardy <kaber@...sh.net>
Subject: [PATCH net 2/2] macvlan: disable LRO on lower device instead of
 macvlan

A macvlan device has always LRO disabled so that calling
dev_disable_lro() on it does nothing. If we need to disable LRO
e.g. because

  - the macvlan device is inserted into a bridge
  - IPv6 forwarding is enabled for it
  - it is in a different namespace than lowerdev and IPv4
    forwarding is enabled in it

we need to disable LRO on its underlying device instead (as we
do for 802.1q VLAN devices).

Signed-off-by: Michal Kubecek <mkubecek@...e.cz>
---
 net/core/dev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/core/dev.c b/net/core/dev.c
index 3430b1e..4af02a9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -131,6 +131,7 @@
 #include <linux/static_key.h>
 #include <linux/hashtable.h>
 #include <linux/vmalloc.h>
+#include <linux/if_macvlan.h>
 
 #include "net-sysfs.h"
 
@@ -1425,6 +1426,10 @@ void dev_disable_lro(struct net_device *dev)
 	if (is_vlan_dev(dev))
 		dev = vlan_dev_real_dev(dev);
 
+	/* the same for macvlan devices */
+	if (is_macvlan_dev(dev))
+		dev = macvlan_dev_real_dev(dev);
+
 	dev->wanted_features &= ~NETIF_F_LRO;
 	netdev_update_features(dev);
 
-- 
1.8.1.4

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