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authorToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>2015-03-27 14:31:10 +0900
committerDavid S. Miller <davem@davemloft.net>2015-03-29 13:33:21 -0700
commit8d463504c191c2126d097ac94fb258aabe6d3e62 (patch)
treee991def61970a02e7c36b1f00ef421bdb72ebd4a
parent608cd71a9c7c9db76e78a792c5a4101e12fea43f (diff)
downloadlinux-8d463504c191c2126d097ac94fb258aabe6d3e62.tar.bz2
vlan: Add features for stacked vlan device
Stacked vlan devices curretly have few features (GRO, HIGHDMA, LLTX). Since we have software fallbacks in case the NIC can not handle some features for multiple vlans, we can add the same features as the lower vlan devices for stacked vlan devices. This allows stacked vlan devices to create large (GSO) packets and not to segment packets. Those packets will be segmented by software on the real device, or even can be segmented by the NIC once TSO for multiple vlans becomes enabled by the following patches. The exception is those related to FCoE, which does not have a software fallback. Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/8021q/vlan_dev.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index f196552ec3c4..8b5ab9033b41 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -554,6 +554,7 @@ static int vlan_dev_init(struct net_device *dev)
if (dev->features & NETIF_F_VLAN_FEATURES)
netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
+ dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
/* ipv6 shared card related stuff */
dev->dev_id = real_dev->dev_id;