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Commit 636e19a3 authored by John Fastabend's avatar John Fastabend Committed by David S. Miller
Browse files

net: consolidate 8021q tagging 



Now that VLAN packets are tagged in dev_hard_start_xmit()
at the bottom of the stack we no longer need to tag them
in the 8021Q module (Except in the !VLAN_FLAG_REORDER_HDR
case).

This allows the accel path and non accel paths to be consolidated.
Here the vlan_tci in the skb is always set and we allow the
stack to add the actual tag in dev_hard_start_xmit().

Signed-off-by: default avatarJohn Fastabend <john.r.fastabend@intel.com>
Acked-by: default avatarJesse Gross <jesse@nicira.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8f5549f3

net/8021q/vlan.h

+0 −4
Original line number Diff line number Diff line
@@ -45,8 +45,6 @@ struct vlan_rx_stats { 
 *	@real_dev: underlying netdevice

 *	@real_dev_addr: address of underlying netdevice

 *	@dent: proc dir entry

 *	@cnt_inc_headroom_on_tx: statistic - number of skb expansions on TX

 *	@cnt_encap_on_xmit: statistic - number of skb encapsulations on TX

 *	@vlan_rx_stats: ptr to percpu rx stats

 */

struct vlan_dev_info {
@@ -62,8 +60,6 @@ struct vlan_dev_info { 
	unsigned char				real_dev_addr[ETH_ALEN];



	struct proc_dir_entry			*dent;

	unsigned long				cnt_inc_headroom_on_tx;

	unsigned long				cnt_encap_on_xmit;

	struct vlan_rx_stats __percpu		*vlan_rx_stats;

};

net/8021q/vlan_dev.c

+7 −98
Original line number Diff line number Diff line
@@ -323,24 +323,12 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 
	 */

	if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||

	    vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {

		unsigned int orig_headroom = skb_headroom(skb);

		u16 vlan_tci;



		vlan_dev_info(dev)->cnt_encap_on_xmit++;



		vlan_tci = vlan_dev_info(dev)->vlan_id;

		vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);

		skb = __vlan_put_tag(skb, vlan_tci);

		if (!skb) {

			txq->tx_dropped++;

			return NETDEV_TX_OK;

		}



		if (orig_headroom < VLAN_HLEN)

			vlan_dev_info(dev)->cnt_inc_headroom_on_tx++;

		skb = __vlan_hwaccel_put_tag(skb, vlan_tci);

	}





	skb_set_dev(skb, vlan_dev_info(dev)->real_dev);

	len = skb->len;

	ret = dev_queue_xmit(skb);
@@ -354,32 +342,6 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 
	return ret;

}



static netdev_tx_t vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb,

						    struct net_device *dev)

{

	int i = skb_get_queue_mapping(skb);

	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);

	u16 vlan_tci;

	unsigned int len;

	int ret;



	vlan_tci = vlan_dev_info(dev)->vlan_id;

	vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);

	skb = __vlan_hwaccel_put_tag(skb, vlan_tci);



	skb->dev = vlan_dev_info(dev)->real_dev;

	len = skb->len;

	ret = dev_queue_xmit(skb);



	if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {

		txq->tx_packets++;

		txq->tx_bytes += len;

	} else

		txq->tx_dropped++;



	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;
@@ -716,8 +678,7 @@ 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_ops_sq;



static int vlan_dev_init(struct net_device *dev)

{
@@ -752,18 +713,15 @@ 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;

	} 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;

	}



	if (is_vlan_dev(real_dev))

		subclass = 1;
@@ -905,30 +863,6 @@ static const struct net_device_ops vlan_netdev_ops = { 
#endif

};



static const struct net_device_ops vlan_netdev_accel_ops = {

	.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

};



static const struct net_device_ops vlan_netdev_ops_sq = {

	.ndo_select_queue	= vlan_dev_select_queue,

	.ndo_change_mtu		= vlan_dev_change_mtu,
@@ -954,31 +888,6 @@ static const struct net_device_ops vlan_netdev_ops_sq = { 
#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);

net/8021q/vlanproc.c

+0 −4
Original line number Diff line number Diff line
@@ -299,10 +299,6 @@ static int vlandev_seq_show(struct seq_file *seq, void *offset) 
	seq_puts(seq, "\n");

	seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets);

	seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes);

	seq_printf(seq, fmt, "total headroom inc",

		   dev_info->cnt_inc_headroom_on_tx);

	seq_printf(seq, fmt, "total encap on xmit",

		   dev_info->cnt_encap_on_xmit);

	seq_printf(seq, "Device: %s", dev_info->real_dev->name);

	/* now show all PRIORITY mappings relating to this VLAN */

	seq_printf(seq, "\nINGRESS priority mappings: "