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vlan: add 802.1q netpoll support 

Add netpoll support to 802.1q vlan devices.  Based on the netpoll support
in the bridging code.  Tested on a forced_eth device with netconsole.

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Benjamin LaHaise 2011-12-08 06:20:49 +00:00 committed by David S. Miller
parent 8af2a218de
commit 6d4cdf47d2
2 changed files with 64 additions and 0 deletions
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5
net/8021q/vlan.h
View File

@ -41,6 +41,8 @@ struct vlan_pcpu_stats {
u32 tx_dropped;
};
struct netpoll;
/**
* struct vlan_dev_priv - VLAN private device data
* @nr_ingress_mappings: number of ingress priority mappings
@ -68,6 +70,9 @@ struct vlan_dev_priv {
struct proc_dir_entry *dent;
struct vlan_pcpu_stats __percpu *vlan_pcpu_stats;
#ifdef CONFIG_NET_POLL_CONTROLLER
struct netpoll *netpoll;
#endif
};
static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev)

59
net/8021q/vlan_dev.c
View File

@ -33,6 +33,7 @@
#include "vlan.h"
#include "vlanproc.h"
#include <linux/if_vlan.h>
#include <linux/netpoll.h>
/*
* Rebuild the Ethernet MAC header. This is called after an ARP
@ -158,6 +159,8 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
skb_set_dev(skb, vlan_dev_priv(dev)->real_dev);
len = skb->len;
if (netpoll_tx_running(dev))
return skb->dev->netdev_ops->ndo_start_xmit(skb, skb->dev);
ret = dev_queue_xmit(skb);
if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
@ -660,6 +663,57 @@ static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, st
return stats;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
void vlan_dev_poll_controller(struct net_device *dev)
{
return;
}
int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
{
struct vlan_dev_priv *info = vlan_dev_priv(dev);
struct net_device *real_dev = info->real_dev;
struct netpoll *netpoll;
int err = 0;
netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
err = -ENOMEM;
if (!netpoll)
goto out;
netpoll->dev = real_dev;
strlcpy(netpoll->dev_name, real_dev->name, IFNAMSIZ);
err = __netpoll_setup(netpoll);
if (err) {
kfree(netpoll);
goto out;
}
info->netpoll = netpoll;
out:
return err;
}
void vlan_dev_netpoll_cleanup(struct net_device *dev)
{
struct vlan_dev_priv *info = vlan_dev_priv(dev);
struct netpoll *netpoll = info->netpoll;
if (!netpoll)
return;
info->netpoll = NULL;
/* Wait for transmitting packets to finish before freeing. */
synchronize_rcu_bh();
__netpoll_cleanup(netpoll);
kfree(netpoll);
}
#endif /* CONFIG_NET_POLL_CONTROLLER */
static const struct ethtool_ops vlan_ethtool_ops = {
.get_settings = vlan_ethtool_get_settings,
.get_drvinfo = vlan_ethtool_get_drvinfo,
@ -687,6 +741,11 @@ static const struct net_device_ops vlan_netdev_ops = {
.ndo_fcoe_disable = vlan_dev_fcoe_disable,
.ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
.ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = vlan_dev_poll_controller,
.ndo_netpoll_setup = vlan_dev_netpoll_setup,
.ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
#endif
.ndo_fix_features = vlan_dev_fix_features,
};