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
;
41 struct list_head sysctl_table_headers
;
43 struct net_device
*loopback_dev
; /* The loopback */
45 struct list_head dev_base_head
;
46 struct hlist_head
*dev_name_head
;
47 struct hlist_head
*dev_index_head
;
50 struct list_head rules_ops
;
51 spinlock_t rules_mod_lock
;
53 struct sock
*rtnl
; /* rtnetlink socket */
55 struct netns_core core
;
57 struct netns_packet packet
;
58 struct netns_unix unx
;
59 struct netns_ipv4 ipv4
;
60 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
61 struct netns_ipv6 ipv6
;
63 #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
64 struct netns_dccp dccp
;
66 #ifdef CONFIG_NETFILTER
69 struct net_generic
*gen
;
73 #include <linux/seq_file_net.h>
75 /* Init's network namespace */
76 extern struct net init_net
;
79 #define INIT_NET_NS(net_ns) .net_ns = &init_net,
81 extern struct net
*copy_net_ns(unsigned long flags
, struct net
*net_ns
);
83 #else /* CONFIG_NET */
85 #define INIT_NET_NS(net_ns)
87 static inline struct net
*copy_net_ns(unsigned long flags
, struct net
*net_ns
)
89 /* There is nothing to copy so this is a noop */
92 #endif /* CONFIG_NET */
95 extern struct list_head net_namespace_list
;
98 extern void __put_net(struct net
*net
);
100 static inline int net_alive(struct net
*net
)
102 return net
&& atomic_read(&net
->count
);
105 static inline struct net
*get_net(struct net
*net
)
107 atomic_inc(&net
->count
);
111 static inline struct net
*maybe_get_net(struct net
*net
)
113 /* Used when we know struct net exists but we
114 * aren't guaranteed a previous reference count
115 * exists. If the reference count is zero this
116 * function fails and returns NULL.
118 if (!atomic_inc_not_zero(&net
->count
))
123 static inline void put_net(struct net
*net
)
125 if (atomic_dec_and_test(&net
->count
))
130 int net_eq(const struct net
*net1
, const struct net
*net2
)
136 static inline int net_alive(struct net
*net
)
141 static inline struct net
*get_net(struct net
*net
)
146 static inline void put_net(struct net
*net
)
150 static inline struct net
*maybe_get_net(struct net
*net
)
156 int net_eq(const struct net
*net1
, const struct net
*net2
)
163 #ifdef NETNS_REFCNT_DEBUG
164 static inline struct net
*hold_net(struct net
*net
)
167 atomic_inc(&net
->use_count
);
171 static inline void release_net(struct net
*net
)
174 atomic_dec(&net
->use_count
);
177 static inline struct net
*hold_net(struct net
*net
)
182 static inline void release_net(struct net
*net
)
188 #define for_each_net(VAR) \
189 list_for_each_entry(VAR, &net_namespace_list, list)
194 #define __net_initdata
196 #define __net_init __init
197 #define __net_exit __exit_refok
198 #define __net_initdata __initdata
201 struct pernet_operations
{
202 struct list_head list
;
203 int (*init
)(struct net
*net
);
204 void (*exit
)(struct net
*net
);
207 extern int register_pernet_subsys(struct pernet_operations
*);
208 extern void unregister_pernet_subsys(struct pernet_operations
*);
209 extern int register_pernet_device(struct pernet_operations
*);
210 extern void unregister_pernet_device(struct pernet_operations
*);
211 extern int register_pernet_gen_device(int *id
, struct pernet_operations
*);
212 extern void unregister_pernet_gen_device(int id
, struct pernet_operations
*);
216 struct ctl_table_header
;
218 extern struct ctl_table_header
*register_net_sysctl_table(struct net
*net
,
219 const struct ctl_path
*path
, struct ctl_table
*table
);
220 extern struct ctl_table_header
*register_net_sysctl_rotable(
221 const struct ctl_path
*path
, struct ctl_table
*table
);
222 extern void unregister_net_sysctl_table(struct ctl_table_header
*header
);
224 #endif /* __NET_NET_NAMESPACE_H */