Messages in this thread Patch in this message | | | From | Jason Wang <> | Subject | [PATCH net V2 1/2] macvlan: forbid L2 fowarding offload for macvtap | Date | Thu, 9 Jan 2014 17:37:31 +0800 |
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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> Signed-off-by: Jason Wang <jasowang@redhat.com> --- drivers/net/macvlan.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 60406b0..5360f73 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); -- 1.7.1
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