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>
19 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
20 #include <net/netns/conntrack.h>
22 #include <net/netns/xfrm.h>
24 struct proc_dir_entry;
27 struct ctl_table_header;
31 atomic_t count; /* To decided when the network
32 * namespace should be freed.
34 #ifdef NETNS_REFCNT_DEBUG
35 atomic_t use_count; /* To track references we
39 struct list_head list; /* list of network namespaces */
40 struct work_struct work; /* work struct for freeing */
42 struct proc_dir_entry *proc_net;
43 struct proc_dir_entry *proc_net_stat;
46 struct ctl_table_set sysctls;
49 struct net_device *loopback_dev; /* The loopback */
51 struct list_head dev_base_head;
52 struct hlist_head *dev_name_head;
53 struct hlist_head *dev_index_head;
56 struct list_head rules_ops;
57 spinlock_t rules_mod_lock;
59 struct sock *rtnl; /* rtnetlink socket */
61 struct netns_core core;
63 struct netns_packet packet;
64 struct netns_unix unx;
65 struct netns_ipv4 ipv4;
66 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
67 struct netns_ipv6 ipv6;
69 #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
70 struct netns_dccp dccp;
72 #ifdef CONFIG_NETFILTER
74 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
79 struct netns_xfrm xfrm;
81 struct net_generic *gen;
85 #include <linux/seq_file_net.h>
87 /* Init's network namespace */
88 extern struct net init_net;
91 #define INIT_NET_NS(net_ns) .net_ns = &init_net,
93 extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
95 #else /* CONFIG_NET */
97 #define INIT_NET_NS(net_ns)
99 static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns)
101 /* There is nothing to copy so this is a noop */
104 #endif /* CONFIG_NET */
107 extern struct list_head net_namespace_list;
110 extern void __put_net(struct net *net);
112 static inline int net_alive(struct net *net)
114 return net && atomic_read(&net->count);
117 static inline struct net *get_net(struct net *net)
119 atomic_inc(&net->count);
123 static inline struct net *maybe_get_net(struct net *net)
125 /* Used when we know struct net exists but we
126 * aren't guaranteed a previous reference count
127 * exists. If the reference count is zero this
128 * function fails and returns NULL.
130 if (!atomic_inc_not_zero(&net->count))
135 static inline void put_net(struct net *net)
137 if (atomic_dec_and_test(&net->count))
142 int net_eq(const struct net *net1, const struct net *net2)
148 static inline int net_alive(struct net *net)
153 static inline struct net *get_net(struct net *net)
158 static inline void put_net(struct net *net)
162 static inline struct net *maybe_get_net(struct net *net)
168 int net_eq(const struct net *net1, const struct net *net2)
175 #ifdef NETNS_REFCNT_DEBUG
176 static inline struct net *hold_net(struct net *net)
179 atomic_inc(&net->use_count);
183 static inline void release_net(struct net *net)
186 atomic_dec(&net->use_count);
189 static inline struct net *hold_net(struct net *net)
194 static inline void release_net(struct net *net)
201 static inline void write_pnet(struct net **pnet, struct net *net)
206 static inline struct net *read_pnet(struct net * const *pnet)
213 #define write_pnet(pnet, net) do { (void)(net);} while (0)
214 #define read_pnet(pnet) (&init_net)
218 #define for_each_net(VAR) \
219 list_for_each_entry(VAR, &net_namespace_list, list)
224 #define __net_initdata
226 #define __net_init __init
227 #define __net_exit __exit_refok
228 #define __net_initdata __initdata
231 struct pernet_operations {
232 struct list_head list;
233 int (*init)(struct net *net);
234 void (*exit)(struct net *net);
237 extern int register_pernet_subsys(struct pernet_operations *);
238 extern void unregister_pernet_subsys(struct pernet_operations *);
239 extern int register_pernet_gen_subsys(int *id, struct pernet_operations *);
240 extern void unregister_pernet_gen_subsys(int id, struct pernet_operations *);
241 extern int register_pernet_device(struct pernet_operations *);
242 extern void unregister_pernet_device(struct pernet_operations *);
243 extern int register_pernet_gen_device(int *id, struct pernet_operations *);
244 extern void unregister_pernet_gen_device(int id, struct pernet_operations *);
248 struct ctl_table_header;
250 extern struct ctl_table_header *register_net_sysctl_table(struct net *net,
251 const struct ctl_path *path, struct ctl_table *table);
252 extern struct ctl_table_header *register_net_sysctl_rotable(
253 const struct ctl_path *path, struct ctl_table *table);
254 extern void unregister_net_sysctl_table(struct ctl_table_header *header);
256 #endif /* __NET_NET_NAMESPACE_H */