From 5fb13570543f4ae022996c9d7c0c099c8abf22dd Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Tue, 20 May 2008 14:54:50 -0700 Subject: [VLAN]: Propagate selected feature bits to VLAN devices Propagate feature bits from the NETDEV_FEAT_CHANGE notifier. For now only TSO is propagated for devices that announce their ability to support TSO in combination with VLAN accel by setting the NETIF_F_VLAN_TSO flag. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/8021q/vlan.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'net/8021q/vlan.c') diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index b934159a6f0..51961300b58 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -382,6 +382,24 @@ static void vlan_sync_address(struct net_device *dev, memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); } +static void vlan_transfer_features(struct net_device *dev, + struct net_device *vlandev) +{ + unsigned long old_features = vlandev->features; + + if (dev->features & NETIF_F_VLAN_TSO) { + vlandev->features &= ~VLAN_TSO_FEATURES; + vlandev->features |= dev->features & VLAN_TSO_FEATURES; + } + if (dev->features & NETIF_F_VLAN_CSUM) { + vlandev->features &= ~NETIF_F_ALL_CSUM; + vlandev->features |= dev->features & NETIF_F_ALL_CSUM; + } + + if (old_features != vlandev->features) + netdev_features_change(vlandev); +} + static void __vlan_device_event(struct net_device *dev, unsigned long event) { switch (event) { @@ -448,6 +466,18 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, } break; + case NETDEV_FEAT_CHANGE: + /* Propagate device features to underlying device */ + for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + vlandev = vlan_group_get_device(grp, i); + if (!vlandev) + continue; + + vlan_transfer_features(dev, vlandev); + } + + break; + case NETDEV_DOWN: /* Put all VLANs for this dev in the down state too. */ for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { -- cgit v1.2.3-70-g09d2