vlan: ethtool ->get_flags support

Allow to query LRO settings of underlying device when VLAN RX
acceleration is used.

Suggested by Ben Hutchings <bhutchings@solarflare.com>.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 9efd3c67c1db..29aa4cc2a260 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -725,9 +725,22 @@ static u32 vlan_ethtool_get_rx_csum(struct net_device *dev)
         return real_dev->ethtool_ops->get_rx_csum(real_dev);
 }
 
+static u32 vlan_ethtool_get_flags(struct net_device *dev)
+{
+        const struct vlan_dev_info *vlan = vlan_dev_info(dev);
+        struct net_device *real_dev = vlan->real_dev;
+
+        if (!(real_dev->features & NETIF_F_HW_VLAN_RX) ||
+            real_dev->ethtool_ops == NULL ||
+            real_dev->ethtool_ops->get_flags == NULL)
+                return 0;
+        return real_dev->ethtool_ops->get_flags(real_dev);
+}
+
 static const struct ethtool_ops vlan_ethtool_ops = {
         .get_link               = ethtool_op_get_link,
         .get_rx_csum            = vlan_ethtool_get_rx_csum,
+        .get_flags              = vlan_ethtool_get_flags,
 };
 
 void vlan_setup(struct net_device *dev)