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/unix.h>
13 #include <net/netns/packet.h>
14 #include <net/netns/ipv4.h>
15 #include <net/netns/ipv6.h>
16 #include <net/netns/x_tables.h>
18 struct proc_dir_entry;
21 struct ctl_table_header;
24 atomic_t count; /* To decided when the network
25 * namespace should be freed.
27 atomic_t use_count; /* To track references we
30 struct list_head list; /* list of network namespaces */
31 struct work_struct work; /* work struct for freeing */
33 struct proc_dir_entry *proc_net;
34 struct proc_dir_entry *proc_net_stat;
36 struct list_head sysctl_table_headers;
38 struct net_device *loopback_dev; /* The loopback */
40 struct list_head dev_base_head;
41 struct hlist_head *dev_name_head;
42 struct hlist_head *dev_index_head;
45 struct list_head rules_ops;
46 spinlock_t rules_mod_lock;
48 struct sock *rtnl; /* rtnetlink socket */
50 struct netns_core core;
51 struct netns_packet packet;
52 struct netns_unix unx;
53 struct netns_ipv4 ipv4;
54 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
55 struct netns_ipv6 ipv6;
57 #ifdef CONFIG_NETFILTER
64 #include <linux/seq_file_net.h>
66 /* Init's network namespace */
67 extern struct net init_net;
68 #define INIT_NET_NS(net_ns) .net_ns = &init_net,
70 extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
72 #else /* CONFIG_NET */
74 #define INIT_NET_NS(net_ns)
76 static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns)
78 /* There is nothing to copy so this is a noop */
81 #endif /* CONFIG_NET */
84 extern struct list_head net_namespace_list;
87 extern void __put_net(struct net *net);
89 static inline struct net *get_net(struct net *net)
91 atomic_inc(&net->count);
95 static inline struct net *maybe_get_net(struct net *net)
97 /* Used when we know struct net exists but we
98 * aren't guaranteed a previous reference count
99 * exists. If the reference count is zero this
100 * function fails and returns NULL.
102 if (!atomic_inc_not_zero(&net->count))
107 static inline void put_net(struct net *net)
109 if (atomic_dec_and_test(&net->count))
113 static inline struct net *hold_net(struct net *net)
115 atomic_inc(&net->use_count);
119 static inline void release_net(struct net *net)
121 atomic_dec(&net->use_count);
125 int net_eq(const struct net *net1, const struct net *net2)
130 static inline struct net *get_net(struct net *net)
135 static inline void put_net(struct net *net)
139 static inline struct net *hold_net(struct net *net)
144 static inline void release_net(struct net *net)
148 static inline struct net *maybe_get_net(struct net *net)
154 int net_eq(const struct net *net1, const struct net *net2)
160 #define for_each_net(VAR) \
161 list_for_each_entry(VAR, &net_namespace_list, list)
166 #define __net_initdata
168 #define __net_init __init
169 #define __net_exit __exit_refok
170 #define __net_initdata __initdata
173 struct pernet_operations {
174 struct list_head list;
175 int (*init)(struct net *net);
176 void (*exit)(struct net *net);
179 extern int register_pernet_subsys(struct pernet_operations *);
180 extern void unregister_pernet_subsys(struct pernet_operations *);
181 extern int register_pernet_device(struct pernet_operations *);
182 extern void unregister_pernet_device(struct pernet_operations *);
186 struct ctl_table_header;
187 extern struct ctl_table_header *register_net_sysctl_table(struct net *net,
188 const struct ctl_path *path, struct ctl_table *table);
189 extern void unregister_net_sysctl_table(struct ctl_table_header *header);
191 #endif /* __NET_NET_NAMESPACE_H */