From c346dca10840a874240c78efe3f39acf4312a1f2 Mon Sep 17 00:00:00 2001 From: YOSHIFUJI Hideaki Date: Tue, 25 Mar 2008 21:47:49 +0900 Subject: [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS. 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 --- include/linux/inetdevice.h | 6 +++--- include/linux/netdevice.h | 25 ++++++++++++++++++++++++- 2 files changed, 27 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h index da05ab47ff2..7009b0cdd06 100644 --- a/include/linux/inetdevice.h +++ b/include/linux/inetdevice.h @@ -70,13 +70,13 @@ static inline void ipv4_devconf_setall(struct in_device *in_dev) ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val)) #define IN_DEV_ANDCONF(in_dev, attr) \ - (IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) && \ + (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ IN_DEV_CONF_GET((in_dev), attr)) #define IN_DEV_ORCONF(in_dev, attr) \ - (IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) || \ + (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \ IN_DEV_CONF_GET((in_dev), attr)) #define IN_DEV_MAXCONF(in_dev, attr) \ - (max(IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr), \ + (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ IN_DEV_CONF_GET((in_dev), attr))) #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index ced61f87660..d146be40f46 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -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); } -- cgit v1.2.3