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;
26 atomic_t count; /* To decided when the network
27 * namespace should be freed.
29 atomic_t use_count; /* To track references we
32 struct list_head list; /* list of network namespaces */
33 struct work_struct work; /* work struct for freeing */
35 struct proc_dir_entry *proc_net;
36 struct proc_dir_entry *proc_net_stat;
38 struct list_head sysctl_table_headers;
40 struct net_device *loopback_dev; /* The loopback */
42 struct list_head dev_base_head;
43 struct hlist_head *dev_name_head;
44 struct hlist_head *dev_index_head;
47 struct list_head rules_ops;
48 spinlock_t rules_mod_lock;
50 struct sock *rtnl; /* rtnetlink socket */
52 struct netns_core core;
53 struct netns_packet packet;
54 struct netns_unix unx;
55 struct netns_ipv4 ipv4;
56 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
57 struct netns_ipv6 ipv6;
59 #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
60 struct netns_dccp dccp;
62 #ifdef CONFIG_NETFILTER
65 struct net_generic *gen;
69 #include <linux/seq_file_net.h>
71 /* Init's network namespace */
72 extern struct net init_net;
75 #define INIT_NET_NS(net_ns) .net_ns = &init_net,
77 extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
79 #else /* CONFIG_NET */
81 #define INIT_NET_NS(net_ns)
83 static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns)
85 /* There is nothing to copy so this is a noop */
88 #endif /* CONFIG_NET */
91 extern struct list_head net_namespace_list;
94 extern void __put_net(struct net *net);
96 static inline struct net *get_net(struct net *net)
98 atomic_inc(&net->count);
102 static inline struct net *maybe_get_net(struct net *net)
104 /* Used when we know struct net exists but we
105 * aren't guaranteed a previous reference count
106 * exists. If the reference count is zero this
107 * function fails and returns NULL.
109 if (!atomic_inc_not_zero(&net->count))
114 static inline void put_net(struct net *net)
116 if (atomic_dec_and_test(&net->count))
120 static inline struct net *hold_net(struct net *net)
122 atomic_inc(&net->use_count);
126 static inline void release_net(struct net *net)
128 atomic_dec(&net->use_count);
132 int net_eq(const struct net *net1, const struct net *net2)
137 static inline struct net *get_net(struct net *net)
142 static inline void put_net(struct net *net)
146 static inline struct net *hold_net(struct net *net)
151 static inline void release_net(struct net *net)
155 static inline struct net *maybe_get_net(struct net *net)
161 int net_eq(const struct net *net1, const struct net *net2)
167 #define for_each_net(VAR) \
168 list_for_each_entry(VAR, &net_namespace_list, list)
173 #define __net_initdata
175 #define __net_init __init
176 #define __net_exit __exit_refok
177 #define __net_initdata __initdata
180 struct pernet_operations {
181 struct list_head list;
182 int (*init)(struct net *net);
183 void (*exit)(struct net *net);
186 extern int register_pernet_subsys(struct pernet_operations *);
187 extern void unregister_pernet_subsys(struct pernet_operations *);
188 extern int register_pernet_device(struct pernet_operations *);
189 extern void unregister_pernet_device(struct pernet_operations *);
190 extern int register_pernet_gen_device(int *id, struct pernet_operations *);
191 extern void unregister_pernet_gen_device(int id, struct pernet_operations *);
195 struct ctl_table_header;
196 extern struct ctl_table_header *register_net_sysctl_table(struct net *net,
197 const struct ctl_path *path, struct ctl_table *table);
198 extern void unregister_net_sysctl_table(struct ctl_table_header *header);
200 #endif /* __NET_NET_NAMESPACE_H */