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[NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.

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Introduce per-net_device inlines: dev_net(), dev_net_set().
Without CONFIG_NET_NS, no namespace other than &init_net exists.
Let's explicitly define them to help compiler optimizations.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki 2008-03-25 21:47:49 +09:00
parent 7cbca67c07
commit c346dca108
87 changed files with 251 additions and 228 deletions
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25
include/linux/netdevice.h
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@ -708,8 +708,10 @@ struct net_device
void (*poll_controller)(struct net_device *dev);
#endif
#ifdef CONFIG_NET_NS
/* Network namespace this network device is inside */
struct net *nd_net;
#endif
/* bridge stuff */
struct net_bridge_port *br_port;
@ -737,6 +739,27 @@ struct net_device
#define NETDEV_ALIGN 32
#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
/*
* Net namespace inlines
*/
static inline
struct net *dev_net(const struct net_device *dev)
{
#ifdef CONFIG_NET_NS
return dev->nd_net;
#else
return &init_net;
#endif
}
static inline
void dev_net_set(struct net_device *dev, const struct net *net)
{
#ifdef CONFIG_NET_NS
dev->nd_dev = net;
#endif
}
/**
* netdev_priv - access network device private data
* @dev: network device
@ -813,7 +836,7 @@ static inline struct net_device *next_net_device(struct net_device *dev)
struct list_head *lh;
struct net *net;
net = dev->nd_net;
net = dev_net(dev);
lh = dev->dev_list.next;
return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}