2 * Operations on the network namespace
4 #ifndef __NET_NET_NAMESPACE_H
5 #define __NET_NET_NAMESPACE_H
7 #include <asm/atomic.h>
8 #include <linux/workqueue.h>
9 #include <linux/list.h>
11 #include <net/netns/core.h>
12 #include <net/netns/mib.h>
13 #include <net/netns/unix.h>
14 #include <net/netns/packet.h>
15 #include <net/netns/ipv4.h>
16 #include <net/netns/ipv6.h>
17 #include <net/netns/dccp.h>
18 #include <net/netns/x_tables.h>
20 struct proc_dir_entry
;
23 struct ctl_table_header
;
27 atomic_t count
; /* To decided when the network
28 * namespace should be freed.
30 #ifdef NETNS_REFCNT_DEBUG
31 atomic_t use_count
; /* To track references we
35 struct list_head list
; /* list of network namespaces */
36 struct work_struct work
; /* work struct for freeing */
38 struct proc_dir_entry
*proc_net
;
39 struct proc_dir_entry
*proc_net_stat
;
42 struct ctl_table_set sysctls
;
45 struct net_device
*loopback_dev
; /* The loopback */
47 struct list_head dev_base_head
;
48 struct hlist_head
*dev_name_head
;
49 struct hlist_head
*dev_index_head
;
52 struct list_head rules_ops
;
53 spinlock_t rules_mod_lock
;
55 struct sock
*rtnl
; /* rtnetlink socket */
57 struct netns_core core
;
59 struct netns_packet packet
;
60 struct netns_unix unx
;
61 struct netns_ipv4 ipv4
;
62 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
63 struct netns_ipv6 ipv6
;
65 #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
66 struct netns_dccp dccp
;
68 #ifdef CONFIG_NETFILTER
71 struct net_generic
*gen
;
75 #include <linux/seq_file_net.h>
77 /* Init's network namespace */
78 extern struct net init_net
;
81 #define INIT_NET_NS(net_ns) .net_ns = &init_net,
83 extern struct net
*copy_net_ns(unsigned long flags
, struct net
*net_ns
);
85 #else /* CONFIG_NET */
87 #define INIT_NET_NS(net_ns)
89 static inline struct net
*copy_net_ns(unsigned long flags
, struct net
*net_ns
)
91 /* There is nothing to copy so this is a noop */
94 #endif /* CONFIG_NET */
97 extern struct list_head net_namespace_list
;
100 extern void __put_net(struct net
*net
);
102 static inline int net_alive(struct net
*net
)
104 return net
&& atomic_read(&net
->count
);
107 static inline struct net
*get_net(struct net
*net
)
109 atomic_inc(&net
->count
);
113 static inline struct net
*maybe_get_net(struct net
*net
)
115 /* Used when we know struct net exists but we
116 * aren't guaranteed a previous reference count
117 * exists. If the reference count is zero this
118 * function fails and returns NULL.
120 if (!atomic_inc_not_zero(&net
->count
))
125 static inline void put_net(struct net
*net
)
127 if (atomic_dec_and_test(&net
->count
))
132 int net_eq(const struct net
*net1
, const struct net
*net2
)
138 static inline int net_alive(struct net
*net
)
143 static inline struct net
*get_net(struct net
*net
)
148 static inline void put_net(struct net
*net
)
152 static inline struct net
*maybe_get_net(struct net
*net
)
158 int net_eq(const struct net
*net1
, const struct net
*net2
)
165 #ifdef NETNS_REFCNT_DEBUG
166 static inline struct net
*hold_net(struct net
*net
)
169 atomic_inc(&net
->use_count
);
173 static inline void release_net(struct net
*net
)
176 atomic_dec(&net
->use_count
);
179 static inline struct net
*hold_net(struct net
*net
)
184 static inline void release_net(struct net
*net
)
190 #define for_each_net(VAR) \
191 list_for_each_entry(VAR, &net_namespace_list, list)
196 #define __net_initdata
198 #define __net_init __init
199 #define __net_exit __exit_refok
200 #define __net_initdata __initdata
203 struct pernet_operations
{
204 struct list_head list
;
205 int (*init
)(struct net
*net
);
206 void (*exit
)(struct net
*net
);
209 extern int register_pernet_subsys(struct pernet_operations
*);
210 extern void unregister_pernet_subsys(struct pernet_operations
*);
211 extern int register_pernet_device(struct pernet_operations
*);
212 extern void unregister_pernet_device(struct pernet_operations
*);
213 extern int register_pernet_gen_device(int *id
, struct pernet_operations
*);
214 extern void unregister_pernet_gen_device(int id
, struct pernet_operations
*);
218 struct ctl_table_header
;
220 extern struct ctl_table_header
*register_net_sysctl_table(struct net
*net
,
221 const struct ctl_path
*path
, struct ctl_table
*table
);
222 extern struct ctl_table_header
*register_net_sysctl_rotable(
223 const struct ctl_path
*path
, struct ctl_table
*table
);
224 extern void unregister_net_sysctl_table(struct ctl_table_header
*header
);
226 #endif /* __NET_NET_NAMESPACE_H */