#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
#include <net/netns/conntrack.h>
#endif
+#include <net/netns/xfrm.h>
struct proc_dir_entry;
struct net_device;
struct netns_ct ct;
#endif
#endif
+#ifdef CONFIG_XFRM
+ struct netns_xfrm xfrm;
+#endif
struct net_generic *gen;
};
#ifdef CONFIG_NET_NS
extern void __put_net(struct net *net);
-static inline int net_alive(struct net *net)
-{
- return net && atomic_read(&net->count);
-}
-
static inline struct net *get_net(struct net *net)
{
atomic_inc(&net->count);
}
#else
-static inline int net_alive(struct net *net)
-{
- return 1;
-}
-
static inline struct net *get_net(struct net *net)
{
return net;
}
#endif
+#ifdef CONFIG_NET_NS
+
+static inline void write_pnet(struct net **pnet, struct net *net)
+{
+ *pnet = net;
+}
+
+static inline struct net *read_pnet(struct net * const *pnet)
+{
+ return *pnet;
+}
+
+#else
+
+#define write_pnet(pnet, net) do { (void)(net);} while (0)
+#define read_pnet(pnet) (&init_net)
+
+#endif
#define for_each_net(VAR) \
list_for_each_entry(VAR, &net_namespace_list, list)
void (*exit)(struct net *net);
};
+/*
+ * Use these carefully. If you implement a network device and it
+ * needs per network namespace operations use device pernet operations,
+ * otherwise use pernet subsys operations.
+ *
+ * This is critically important. Most of the network code cleanup
+ * runs with the assumption that dev_remove_pack has been called so no
+ * new packets will arrive during and after the cleanup functions have
+ * been called. dev_remove_pack is not per namespace so instead the
+ * guarantee of no more packets arriving in a network namespace is
+ * provided by ensuring that all network devices and all sockets have
+ * left the network namespace before the cleanup methods are called.
+ *
+ * For the longest time the ipv4 icmp code was registered as a pernet
+ * device which caused kernel oops, and panics during network
+ * namespace cleanup. So please don't get this wrong.
+ */
extern int register_pernet_subsys(struct pernet_operations *);
extern void unregister_pernet_subsys(struct pernet_operations *);
extern int register_pernet_gen_subsys(int *id, struct pernet_operations *);