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/dccp.h>
17 #include <net/netns/x_tables.h>
19 struct proc_dir_entry;
22 struct ctl_table_header;
25 atomic_t count; /* To decided when the network
26 * namespace should be freed.
28 atomic_t use_count; /* To track references we
31 struct list_head list; /* list of network namespaces */
32 struct work_struct work; /* work struct for freeing */
34 struct proc_dir_entry *proc_net;
35 struct proc_dir_entry *proc_net_stat;
37 struct list_head sysctl_table_headers;
39 struct net_device *loopback_dev; /* The loopback */
41 struct list_head dev_base_head;
42 struct hlist_head *dev_name_head;
43 struct hlist_head *dev_index_head;
46 struct list_head rules_ops;
47 spinlock_t rules_mod_lock;
49 struct sock *rtnl; /* rtnetlink socket */
51 struct netns_core core;
52 struct netns_packet packet;
53 struct netns_unix unx;
54 struct netns_ipv4 ipv4;
55 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
56 struct netns_ipv6 ipv6;
58 #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
59 struct netns_dccp dccp;
61 #ifdef CONFIG_NETFILTER
67 #include <linux/seq_file_net.h>
69 /* Init's network namespace */
70 extern struct net init_net;
73 #define INIT_NET_NS(net_ns) .net_ns = &init_net,
75 extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
77 #else /* CONFIG_NET */
79 #define INIT_NET_NS(net_ns)
81 static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns)
83 /* There is nothing to copy so this is a noop */
86 #endif /* CONFIG_NET */
89 extern struct list_head net_namespace_list;
92 extern void __put_net(struct net *net);
94 static inline struct net *get_net(struct net *net)
96 atomic_inc(&net->count);
100 static inline struct net *maybe_get_net(struct net *net)
102 /* Used when we know struct net exists but we
103 * aren't guaranteed a previous reference count
104 * exists. If the reference count is zero this
105 * function fails and returns NULL.
107 if (!atomic_inc_not_zero(&net->count))
112 static inline void put_net(struct net *net)
114 if (atomic_dec_and_test(&net->count))
118 static inline struct net *hold_net(struct net *net)
120 atomic_inc(&net->use_count);
124 static inline void release_net(struct net *net)
126 atomic_dec(&net->use_count);
130 int net_eq(const struct net *net1, const struct net *net2)
135 static inline struct net *get_net(struct net *net)
140 static inline void put_net(struct net *net)
144 static inline struct net *hold_net(struct net *net)
149 static inline void release_net(struct net *net)
153 static inline struct net *maybe_get_net(struct net *net)
159 int net_eq(const struct net *net1, const struct net *net2)
165 #define for_each_net(VAR) \
166 list_for_each_entry(VAR, &net_namespace_list, list)
171 #define __net_initdata
173 #define __net_init __init
174 #define __net_exit __exit_refok
175 #define __net_initdata __initdata
178 struct pernet_operations {
179 struct list_head list;
180 int (*init)(struct net *net);
181 void (*exit)(struct net *net);
184 extern int register_pernet_subsys(struct pernet_operations *);
185 extern void unregister_pernet_subsys(struct pernet_operations *);
186 extern int register_pernet_device(struct pernet_operations *);
187 extern void unregister_pernet_device(struct pernet_operations *);
191 struct ctl_table_header;
192 extern struct ctl_table_header *register_net_sysctl_table(struct net *net,
193 const struct ctl_path *path, struct ctl_table *table);
194 extern void unregister_net_sysctl_table(struct ctl_table_header *header);
196 #endif /* __NET_NET_NAMESPACE_H */