struct net_device;
struct sock;
struct ctl_table_header;
+struct net_generic;
struct net {
atomic_t count; /* To decided when the network
* namespace should be freed.
*/
+#ifdef NETNS_REFCNT_DEBUG
atomic_t use_count; /* To track references we
* destroy on demand
*/
+#endif
struct list_head list; /* list of network namespaces */
struct work_struct work; /* work struct for freeing */
#ifdef CONFIG_NETFILTER
struct netns_xt xt;
#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);
__put_net(net);
}
-static inline struct net *hold_net(struct net *net)
-{
- atomic_inc(&net->use_count);
- return net;
-}
-
-static inline void release_net(struct net *net)
-{
- atomic_dec(&net->use_count);
-}
-
static inline
int net_eq(const struct net *net1, const struct net *net2)
{
return net1 == net2;
}
#else
+
+static inline int net_alive(struct net *net)
+{
+ return 1;
+}
+
static inline struct net *get_net(struct net *net)
{
return net;
{
}
+static inline struct net *maybe_get_net(struct net *net)
+{
+ return net;
+}
+
+static inline
+int net_eq(const struct net *net1, const struct net *net2)
+{
+ return 1;
+}
+#endif
+
+
+#ifdef NETNS_REFCNT_DEBUG
static inline struct net *hold_net(struct net *net)
{
+ if (net)
+ atomic_inc(&net->use_count);
return net;
}
static inline void release_net(struct net *net)
{
+ if (net)
+ atomic_dec(&net->use_count);
}
-
-static inline struct net *maybe_get_net(struct net *net)
+#else
+static inline struct net *hold_net(struct net *net)
{
return net;
}
-static inline
-int net_eq(const struct net *net1, const struct net *net2)
+static inline void release_net(struct net *net)
{
- return 1;
}
#endif
+
#define for_each_net(VAR) \
list_for_each_entry(VAR, &net_namespace_list, list)
extern void unregister_pernet_subsys(struct pernet_operations *);
extern int register_pernet_device(struct pernet_operations *);
extern void unregister_pernet_device(struct pernet_operations *);
+extern int register_pernet_gen_device(int *id, struct pernet_operations *);
+extern void unregister_pernet_gen_device(int id, struct pernet_operations *);
struct ctl_path;
struct ctl_table;