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authorPatrick McHardy <kaber@trash.net>2008-05-20 17:54:50 -0400
committerDavid S. Miller <davem@davemloft.net>2008-05-20 17:54:50 -0400
commit5fb13570543f4ae022996c9d7c0c099c8abf22dd (patch)
treebf0f837d4b2dd778c32cf8fcf719913203f1cd39 /net/8021q/vlan.c
parent7ff6e6f779960e1078a78b60a881571c04f52b9b (diff)
[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 <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q/vlan.c')
-rw-r--r--net/8021q/vlan.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index b934159a6f07..51961300b586 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -382,6 +382,24 @@ static void vlan_sync_address(struct net_device *dev,
382 memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); 382 memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
383} 383}
384 384
385static void vlan_transfer_features(struct net_device *dev,
386 struct net_device *vlandev)
387{
388 unsigned long old_features = vlandev->features;
389
390 if (dev->features & NETIF_F_VLAN_TSO) {
391 vlandev->features &= ~VLAN_TSO_FEATURES;
392 vlandev->features |= dev->features & VLAN_TSO_FEATURES;
393 }
394 if (dev->features & NETIF_F_VLAN_CSUM) {
395 vlandev->features &= ~NETIF_F_ALL_CSUM;
396 vlandev->features |= dev->features & NETIF_F_ALL_CSUM;
397 }
398
399 if (old_features != vlandev->features)
400 netdev_features_change(vlandev);
401}
402
385static void __vlan_device_event(struct net_device *dev, unsigned long event) 403static void __vlan_device_event(struct net_device *dev, unsigned long event)
386{ 404{
387 switch (event) { 405 switch (event) {
@@ -448,6 +466,18 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
448 } 466 }
449 break; 467 break;
450 468
469 case NETDEV_FEAT_CHANGE:
470 /* Propagate device features to underlying device */
471 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
472 vlandev = vlan_group_get_device(grp, i);
473 if (!vlandev)
474 continue;
475
476 vlan_transfer_features(dev, vlandev);
477 }
478
479 break;
480
451 case NETDEV_DOWN: 481 case NETDEV_DOWN:
452 /* Put all VLANs for this dev in the down state too. */ 482 /* Put all VLANs for this dev in the down state too. */
453 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 483 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {