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Date:	Thu, 11 Nov 2010 20:42:45 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Jesse Gross <jesse@...ira.com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: [PATCH net-next-2.6] vlan: remove ndo_select_queue() logic

Le jeudi 11 novembre 2010 à 10:56 -0800, Jesse Gross a écrit :
> On Thu, Nov 11, 2010 at 9:52 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:

> Before Tom's patch, a warning will be generated if a single queue vlan
> device is stacked on top of a multiqueue physical device that
> implements ndo_select_queue().  After Tom's patch, we avoid the
> warning so vlan_dev_select_queue() is merely dead code.  Either way,
> what's the benefit in keeping it?
> 
> >
> >
> > This logicaly is a second cleanup patch I believe.
> 
> I'm not arguing against your patch, I just think it should go a step further.

Sure ! Here is the thing ;)

Thanks

[PATCH] vlan: remove ndo_select_queue() logic

Now vlan are lockless, we dont need special ndo_select_queue() logic.
dev_pick_tx() will do the multiqueue stuff on the real device transmit.

Suggested-by: Jesse Gross <jesse@...ira.com>
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
 net/8021q/vlan_dev.c |   71 +----------------------------------------
 1 files changed, 3 insertions(+), 68 deletions(-)

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 3a67483..99d6910 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -390,14 +390,6 @@ 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,
@@ -726,8 +718,7 @@ 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,
-		    vlan_netdev_ops_sq, vlan_netdev_accel_ops_sq;
+static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops;
 
 static int vlan_dev_init(struct net_device *dev)
 {
@@ -763,17 +754,11 @@ 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;
-		if (real_dev->netdev_ops->ndo_select_queue)
-			dev->netdev_ops = &vlan_netdev_accel_ops_sq;
-		else
-			dev->netdev_ops = &vlan_netdev_accel_ops;
+		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;
-		if (real_dev->netdev_ops->ndo_select_queue)
-			dev->netdev_ops = &vlan_netdev_ops_sq;
-		else
-			dev->netdev_ops = &vlan_netdev_ops;
+		dev->netdev_ops = &vlan_netdev_ops;
 	}
 
 	if (is_vlan_dev(real_dev))
@@ -944,56 +929,6 @@ 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_stats64	= vlan_dev_get_stats64,
-#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_stats64	= vlan_dev_get_stats64,
-#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);


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