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| author | Michal Kubeček <mkubecek@suse.cz> | 2014-12-05 17:05:49 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-09 16:00:22 -0500 |
| commit | 62dbe83015ed15b307eb22b89568dd41091dda76 (patch) | |
| tree | 7529dd8e6790a5148aef58eddeacd88f9ce6a2a7 | |
| parent | bd42b788607b850b84e7c754d351cbec93c681e1 (diff) | |
| download | blackbird-op-linux-62dbe83015ed15b307eb22b89568dd41091dda76.tar.gz blackbird-op-linux-62dbe83015ed15b307eb22b89568dd41091dda76.zip | |
macvlan: allow setting LRO independently of lower device
Since commit fbe168ba91f7 ("net: generic dev_disable_lro() stacked
device handling"), dev_disable_lro() zeroes NETIF_F_LRO feature flag
first for a macvlan device and then for its lower device. As an attempt
to set NETIF_F_LRO to zero is ignored, dev_disable_lro() issues a
warning and taints kernel.
Allowing NETIF_F_LRO to be set independently of the lower device
consists of three parts:
- add the flag to hw_features to allow toggling it
- allow setting it to 0 even if lower device has the flag set
- add the flag to MACVLAN_FEATURES to restore copying from lower
device on macvlan creation
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/macvlan.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 9538674587aa..10604db2a3a0 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -747,7 +747,7 @@ static struct lock_class_key macvlan_netdev_addr_lock_key; #define MACVLAN_FEATURES \ (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ - NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | \ + NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \ NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) @@ -784,6 +784,7 @@ static int macvlan_init(struct net_device *dev) (lowerdev->state & MACVLAN_STATE_MASK); dev->features = lowerdev->features & MACVLAN_FEATURES; dev->features |= ALWAYS_ON_FEATURES; + dev->hw_features |= NETIF_F_LRO; dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; dev->gso_max_size = lowerdev->gso_max_size; dev->iflink = lowerdev->ifindex; @@ -936,15 +937,15 @@ static netdev_features_t macvlan_fix_features(struct net_device *dev, netdev_features_t features) { struct macvlan_dev *vlan = netdev_priv(dev); + netdev_features_t lowerdev_features = vlan->lowerdev->features; netdev_features_t mask; features |= NETIF_F_ALL_FOR_ALL; features &= (vlan->set_features | ~MACVLAN_FEATURES); mask = features; - features = netdev_increment_features(vlan->lowerdev->features, - features, - mask); + lowerdev_features &= (features | ~NETIF_F_LRO); + features = netdev_increment_features(lowerdev_features, features, mask); features |= ALWAYS_ON_FEATURES; features &= ~NETIF_F_NETNS_LOCAL; |
