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bridge: make bridge support netpoll

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Based on the previous patch, make bridge support netpoll by:

1) implement the 2 methods to support netpoll for bridge;

2) modify netpoll during forwarding packets via bridge;

3) disable netpoll support of bridge when a netpoll-unabled device
   is added to bridge;

4) enable netpoll support when all underlying devices support netpoll.

Cc: David Miller <davem@davemloft.net>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
WANG Cong
2010-05-06 00:48:24 -07:00
committed by David S. Miller
parent 0e34e93177
commit c06ee961d3
4 changed files with 108 additions and 1 deletions
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59
net/bridge/br_device.c
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@@ -13,8 +13,10 @@
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/netpoll.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/list.h>
#include <asm/uaccess.h>
#include "br_private.h"
@@ -188,6 +190,59 @@ static int br_set_tx_csum(struct net_device *dev, u32 data)
return 0;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
bool br_devices_support_netpoll(struct net_bridge *br)
{
struct net_bridge_port *p;
bool ret = true;
int count = 0;
unsigned long flags;
spin_lock_irqsave(&br->lock, flags);
list_for_each_entry(p, &br->port_list, list) {
count++;
if ((p->dev->priv_flags & IFF_DISABLE_NETPOLL) ||
!p->dev->netdev_ops->ndo_poll_controller)
ret = false;
}
spin_unlock_irqrestore(&br->lock, flags);
return count != 0 && ret;
}
static void br_poll_controller(struct net_device *br_dev)
{
struct netpoll *np = br_dev->npinfo->netpoll;
if (np->real_dev != br_dev)
netpoll_poll_dev(np->real_dev);
}
void br_netpoll_cleanup(struct net_device *br_dev)
{
struct net_bridge *br = netdev_priv(br_dev);
struct net_bridge_port *p, *n;
const struct net_device_ops *ops;
br->dev->npinfo = NULL;
list_for_each_entry_safe(p, n, &br->port_list, list) {
if (p->dev) {
ops = p->dev->netdev_ops;
if (ops->ndo_netpoll_cleanup)
ops->ndo_netpoll_cleanup(p->dev);
else
p->dev->npinfo = NULL;
}
}
}
#else
void br_netpoll_cleanup(struct net_device *br_dev)
{
}
#endif
static const struct ethtool_ops br_ethtool_ops = {
.get_drvinfo = br_getinfo,
.get_link = ethtool_op_get_link,
@@ -211,6 +266,10 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_set_multicast_list = br_dev_set_multicast_list,
.ndo_change_mtu = br_change_mtu,
.ndo_do_ioctl = br_dev_ioctl,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_netpoll_cleanup = br_netpoll_cleanup,
.ndo_poll_controller = br_poll_controller,
#endif
};
static void br_dev_free(struct net_device *dev)