#include <linux/workqueue.h>
#include <linux/list.h>
+#include <net/netns/unix.h>
+#include <net/netns/packet.h>
+
struct proc_dir_entry;
+struct net_device;
+struct sock;
+struct ctl_table_header;
+
struct net {
atomic_t count; /* To decided when the network
* namespace should be freed.
struct proc_dir_entry *proc_net_stat;
struct proc_dir_entry *proc_net_root;
+ struct list_head sysctl_table_headers;
+
+ struct net_device *loopback_dev; /* The loopback */
+
struct list_head dev_base_head;
struct hlist_head *dev_name_head;
struct hlist_head *dev_index_head;
+
+ struct sock *rtnl; /* rtnetlink socket */
+
+ /* core sysctls */
+ struct ctl_table_header *sysctl_core_hdr;
+ int sysctl_somaxconn;
+
+ struct netns_packet packet;
+ struct netns_unix unx;
};
+#ifdef CONFIG_NET
+/* Init's network namespace */
extern struct net init_net;
+#define INIT_NET_NS(net_ns) .net_ns = &init_net,
+#else
+#define INIT_NET_NS(net_ns)
+#endif
+
extern struct list_head net_namespace_list;
+#ifdef CONFIG_NET
+extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
+#else
+static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns)
+{
+ /* There is nothing to copy so this is a noop */
+ return net_ns;
+}
+#endif
+
+#ifdef CONFIG_NET_NS
extern void __put_net(struct net *net);
static inline struct net *get_net(struct net *net)
return net;
}
+static inline struct net *maybe_get_net(struct net *net)
+{
+ /* Used when we know struct net exists but we
+ * aren't guaranteed a previous reference count
+ * exists. If the reference count is zero this
+ * function fails and returns NULL.
+ */
+ if (!atomic_inc_not_zero(&net->count))
+ net = NULL;
+ return net;
+}
+
static inline void put_net(struct net *net)
{
if (atomic_dec_and_test(&net->count))
{
atomic_dec(&net->use_count);
}
+#else
+static inline struct net *get_net(struct net *net)
+{
+ return net;
+}
+
+static inline void put_net(struct net *net)
+{
+}
+
+static inline struct net *hold_net(struct net *net)
+{
+ return net;
+}
-extern void net_lock(void);
-extern void net_unlock(void);
+static inline void release_net(struct net *net)
+{
+}
+
+static inline struct net *maybe_get_net(struct net *net)
+{
+ return net;
+}
+#endif
#define for_each_net(VAR) \
list_for_each_entry(VAR, &net_namespace_list, list)
+#ifdef CONFIG_NET_NS
+#define __net_init
+#define __net_exit
+#define __net_initdata
+#else
+#define __net_init __init
+#define __net_exit __exit_refok
+#define __net_initdata __initdata
+#endif
struct pernet_operations {
struct list_head list;
extern int register_pernet_device(struct pernet_operations *);
extern void unregister_pernet_device(struct pernet_operations *);
+struct ctl_path;
+struct ctl_table;
+struct ctl_table_header;
+extern struct ctl_table_header *register_net_sysctl_table(struct net *net,
+ const struct ctl_path *path, struct ctl_table *table);
+extern void unregister_net_sysctl_table(struct ctl_table_header *header);
+
#endif /* __NET_NET_NAMESPACE_H */