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authorVasu Dev <vasu.dev@intel.com>2010-03-23 14:41:45 +0000
committerDavid S. Miller <davem@davemloft.net>2010-03-24 11:11:38 -0700
commit669d3e0babb40018dd6e78f4093c13a2eac73866 (patch)
treeb463681d16ac806ddc889b02623361c64047d281 /net/8021q
parent31b24b955c3ebbb6f3008a6374e61cf7c05a193c (diff)
downloadlinux-669d3e0babb40018dd6e78f4093c13a2eac73866.tar.bz2
vlan: adds vlan_dev_select_queue
This is required to correctly select vlan tx queue for a driver supporting multi tx queue with ndo_select_queue implemented since currently selected vlan tx queue is unaligned to selected queue by real net_devce ndo_select_queue. Unaligned vlan tx queue selection causes thrash with higher vlan tx lock contention for least fcoe traffic and wrong socket tx queue_mapping for ixgbe having ndo_select_queue implemented. -v2 As per Eric Dumazet<eric.dumazet@gmail.com> comments, mirrored vlan net_device_ops to have them with and without vlan_dev_select_queue and then select according to real dev ndo_select_queue present or not for a vlan net_device. This is to completely skip vlan_dev_select_queue calling for real net_device not supporting ndo_select_queue. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q')
-rw-r--r--net/8021q/vlan_dev.c71
1 files changed, 68 insertions, 3 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 9e83272fc5b0..2fd057c81bbf 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -361,6 +361,14 @@ static netdev_tx_t vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb,
return ret;
}
+static u16 vlan_dev_select_queue(struct net_device *dev, struct sk_buff *skb)
+{
+ struct net_device *rdev = vlan_dev_info(dev)->real_dev;
+ const struct net_device_ops *ops = rdev->netdev_ops;
+
+ return ops->ndo_select_queue(rdev, skb);
+}
+
static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
{
/* TODO: gotta make sure the underlying layer can handle it,
@@ -688,7 +696,8 @@ static const struct header_ops vlan_header_ops = {
.parse = eth_header_parse,
};
-static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops;
+static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops,
+ vlan_netdev_ops_sq, vlan_netdev_accel_ops_sq;
static int vlan_dev_init(struct net_device *dev)
{
@@ -722,11 +731,17 @@ static int vlan_dev_init(struct net_device *dev)
if (real_dev->features & NETIF_F_HW_VLAN_TX) {
dev->header_ops = real_dev->header_ops;
dev->hard_header_len = real_dev->hard_header_len;
- dev->netdev_ops = &vlan_netdev_accel_ops;
+ if (real_dev->netdev_ops->ndo_select_queue)
+ dev->netdev_ops = &vlan_netdev_accel_ops_sq;
+ else
+ dev->netdev_ops = &vlan_netdev_accel_ops;
} else {
dev->header_ops = &vlan_header_ops;
dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
- dev->netdev_ops = &vlan_netdev_ops;
+ if (real_dev->netdev_ops->ndo_select_queue)
+ dev->netdev_ops = &vlan_netdev_ops_sq;
+ else
+ dev->netdev_ops = &vlan_netdev_ops;
}
if (is_vlan_dev(real_dev))
@@ -865,6 +880,56 @@ static const struct net_device_ops vlan_netdev_accel_ops = {
#endif
};
+static const struct net_device_ops vlan_netdev_ops_sq = {
+ .ndo_select_queue = vlan_dev_select_queue,
+ .ndo_change_mtu = vlan_dev_change_mtu,
+ .ndo_init = vlan_dev_init,
+ .ndo_uninit = vlan_dev_uninit,
+ .ndo_open = vlan_dev_open,
+ .ndo_stop = vlan_dev_stop,
+ .ndo_start_xmit = vlan_dev_hard_start_xmit,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = vlan_dev_set_mac_address,
+ .ndo_set_rx_mode = vlan_dev_set_rx_mode,
+ .ndo_set_multicast_list = vlan_dev_set_rx_mode,
+ .ndo_change_rx_flags = vlan_dev_change_rx_flags,
+ .ndo_do_ioctl = vlan_dev_ioctl,
+ .ndo_neigh_setup = vlan_dev_neigh_setup,
+ .ndo_get_stats = vlan_dev_get_stats,
+#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
+ .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
+ .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
+ .ndo_fcoe_enable = vlan_dev_fcoe_enable,
+ .ndo_fcoe_disable = vlan_dev_fcoe_disable,
+ .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
+#endif
+};
+
+static const struct net_device_ops vlan_netdev_accel_ops_sq = {
+ .ndo_select_queue = vlan_dev_select_queue,
+ .ndo_change_mtu = vlan_dev_change_mtu,
+ .ndo_init = vlan_dev_init,
+ .ndo_uninit = vlan_dev_uninit,
+ .ndo_open = vlan_dev_open,
+ .ndo_stop = vlan_dev_stop,
+ .ndo_start_xmit = vlan_dev_hwaccel_hard_start_xmit,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = vlan_dev_set_mac_address,
+ .ndo_set_rx_mode = vlan_dev_set_rx_mode,
+ .ndo_set_multicast_list = vlan_dev_set_rx_mode,
+ .ndo_change_rx_flags = vlan_dev_change_rx_flags,
+ .ndo_do_ioctl = vlan_dev_ioctl,
+ .ndo_neigh_setup = vlan_dev_neigh_setup,
+ .ndo_get_stats = vlan_dev_get_stats,
+#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
+ .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
+ .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
+ .ndo_fcoe_enable = vlan_dev_fcoe_enable,
+ .ndo_fcoe_disable = vlan_dev_fcoe_disable,
+ .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
+#endif
+};
+
void vlan_setup(struct net_device *dev)
{
ether_setup(dev);