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authorJason Wang <jasowang@redhat.com>2014-01-10 16:18:25 +0800
committerDavid S. Miller <davem@davemloft.net>2014-01-10 13:23:08 -0500
commitb13ba1b83f524732523db1079e56478b32c85c96 (patch)
tree63211a1c1830aa87c46a94722b072bb781b4ddca
parentc4d7099867c7e7ade7693a5ac06f12b3c3cdbf8e (diff)
downloadlinux-linaro-stable-b13ba1b83f524732523db1079e56478b32c85c96.tar.gz
macvlan: forbid L2 fowarding offload for macvtap
L2 fowarding offload will bypass the rx handler of real device. This will make the packet could not be forwarded to macvtap device. Another problem is the dev_hard_start_xmit() called for macvtap does not have any synchronization. Fix this by forbidding L2 forwarding for macvtap. Cc: John Fastabend <john.r.fastabend@intel.com> Cc: Neil Horman <nhorman@tuxdriver.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Acked-by: John Fastabend <john.r.fastabend@intel.com.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/macvlan.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 60406b01f9eb..5360f73c9817 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -338,6 +338,8 @@ static const struct header_ops macvlan_hard_header_ops = {
.cache_update = eth_header_cache_update,
};
+static struct rtnl_link_ops macvlan_link_ops;
+
static int macvlan_open(struct net_device *dev)
{
struct macvlan_dev *vlan = netdev_priv(dev);
@@ -353,7 +355,8 @@ static int macvlan_open(struct net_device *dev)
goto hash_add;
}
- if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) {
+ if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD &&
+ dev->rtnl_link_ops == &macvlan_link_ops) {
vlan->fwd_priv =
lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);