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Date: Fri, 10 Jan 2014 16:18:25 +0800 From: Jason Wang <jasowang@...hat.com> To: davem@...emloft.net, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Cc: mst@...hat.com, Jason Wang <jasowang@...hat.com>, John Fastabend <john.r.fastabend@...el.com>, Neil Horman <nhorman@...driver.com> Subject: [PATCH net V3 1/2] 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@...el.com> Cc: Neil Horman <nhorman@...driver.com> Acked-by: Neil Horman <nhorman@...driver.com> Signed-off-by: Jason Wang <jasowang@...hat.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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