1
2
3
4#ifndef __NET_NET_NAMESPACE_H
5#define __NET_NET_NAMESPACE_H
6
7#include <asm/atomic.h>
8#include <linux/workqueue.h>
9#include <linux/list.h>
10#include <linux/sysctl.h>
11
12#include <net/netns/core.h>
13#include <net/netns/mib.h>
14#include <net/netns/unix.h>
15#include <net/netns/packet.h>
16#include <net/netns/ipv4.h>
17#include <net/netns/ipv6.h>
18#include <net/netns/dccp.h>
19#include <net/netns/x_tables.h>
20#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
21#include <net/netns/conntrack.h>
22#endif
23#include <net/netns/xfrm.h>
24
25struct proc_dir_entry;
26struct net_device;
27struct sock;
28struct ctl_table_header;
29struct net_generic;
30struct sock;
31struct netns_ipvs;
32
33
34#define NETDEV_HASHBITS 8
35#define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
36
37struct net {
38 atomic_t passive;
39
40
41 atomic_t count;
42
43
44#ifdef NETNS_REFCNT_DEBUG
45 atomic_t use_count;
46
47
48#endif
49 spinlock_t rules_mod_lock;
50
51 struct list_head list;
52 struct list_head cleanup_list;
53 struct list_head exit_list;
54
55 struct proc_dir_entry *proc_net;
56 struct proc_dir_entry *proc_net_stat;
57
58#ifdef CONFIG_SYSCTL
59 struct ctl_table_set sysctls;
60#endif
61
62 struct sock *rtnl;
63 struct sock *genl_sock;
64
65 struct list_head dev_base_head;
66 struct hlist_head *dev_name_head;
67 struct hlist_head *dev_index_head;
68
69
70 struct list_head rules_ops;
71
72
73 struct net_device *loopback_dev;
74 struct netns_core core;
75 struct netns_mib mib;
76 struct netns_packet packet;
77 struct netns_unix unx;
78 struct netns_ipv4 ipv4;
79#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
80 struct netns_ipv6 ipv6;
81#endif
82#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
83 struct netns_dccp dccp;
84#endif
85#ifdef CONFIG_NETFILTER
86 struct netns_xt xt;
87#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
88 struct netns_ct ct;
89#endif
90 struct sock *nfnl;
91 struct sock *nfnl_stash;
92#endif
93#ifdef CONFIG_WEXT_CORE
94 struct sk_buff_head wext_nlevents;
95#endif
96 struct net_generic __rcu *gen;
97
98
99#ifdef CONFIG_XFRM
100 struct netns_xfrm xfrm;
101#endif
102 struct netns_ipvs *ipvs;
103};
104
105
106#include <linux/seq_file_net.h>
107
108
109extern struct net init_net;
110
111#ifdef CONFIG_NET
112extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
113
114#else
115static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns)
116{
117
118 return net_ns;
119}
120#endif
121
122
123extern struct list_head net_namespace_list;
124
125extern struct net *get_net_ns_by_pid(pid_t pid);
126extern struct net *get_net_ns_by_fd(int pid);
127
128#ifdef CONFIG_NET_NS
129extern void __put_net(struct net *net);
130
131static inline struct net *get_net(struct net *net)
132{
133 atomic_inc(&net->count);
134 return net;
135}
136
137static inline struct net *maybe_get_net(struct net *net)
138{
139
140
141
142
143
144 if (!atomic_inc_not_zero(&net->count))
145 net = NULL;
146 return net;
147}
148
149static inline void put_net(struct net *net)
150{
151 if (atomic_dec_and_test(&net->count))
152 __put_net(net);
153}
154
155static inline
156int net_eq(const struct net *net1, const struct net *net2)
157{
158 return net1 == net2;
159}
160
161extern void net_drop_ns(void *);
162
163#else
164
165static inline struct net *get_net(struct net *net)
166{
167 return net;
168}
169
170static inline void put_net(struct net *net)
171{
172}
173
174static inline struct net *maybe_get_net(struct net *net)
175{
176 return net;
177}
178
179static inline
180int net_eq(const struct net *net1, const struct net *net2)
181{
182 return 1;
183}
184
185#define net_drop_ns NULL
186#endif
187
188
189#ifdef NETNS_REFCNT_DEBUG
190static inline struct net *hold_net(struct net *net)
191{
192 if (net)
193 atomic_inc(&net->use_count);
194 return net;
195}
196
197static inline void release_net(struct net *net)
198{
199 if (net)
200 atomic_dec(&net->use_count);
201}
202#else
203static inline struct net *hold_net(struct net *net)
204{
205 return net;
206}
207
208static inline void release_net(struct net *net)
209{
210}
211#endif
212
213#ifdef CONFIG_NET_NS
214
215static inline void write_pnet(struct net **pnet, struct net *net)
216{
217 *pnet = net;
218}
219
220static inline struct net *read_pnet(struct net * const *pnet)
221{
222 return *pnet;
223}
224
225#else
226
227#define write_pnet(pnet, net) do { (void)(net);} while (0)
228#define read_pnet(pnet) (&init_net)
229
230#endif
231
232#define for_each_net(VAR) \
233 list_for_each_entry(VAR, &net_namespace_list, list)
234
235#define for_each_net_rcu(VAR) \
236 list_for_each_entry_rcu(VAR, &net_namespace_list, list)
237
238#ifdef CONFIG_NET_NS
239#define __net_init
240#define __net_exit
241#define __net_initdata
242#else
243#define __net_init __init
244#define __net_exit __exit_refok
245#define __net_initdata __initdata
246#endif
247
248struct pernet_operations {
249 struct list_head list;
250 int (*init)(struct net *net);
251 void (*exit)(struct net *net);
252 void (*exit_batch)(struct list_head *net_exit_list);
253 int *id;
254 size_t size;
255};
256
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274
275
276extern int register_pernet_subsys(struct pernet_operations *);
277extern void unregister_pernet_subsys(struct pernet_operations *);
278extern int register_pernet_device(struct pernet_operations *);
279extern void unregister_pernet_device(struct pernet_operations *);
280
281struct ctl_path;
282struct ctl_table;
283struct ctl_table_header;
284
285extern struct ctl_table_header *register_net_sysctl_table(struct net *net,
286 const struct ctl_path *path, struct ctl_table *table);
287extern struct ctl_table_header *register_net_sysctl_rotable(
288 const struct ctl_path *path, struct ctl_table *table);
289extern void unregister_net_sysctl_table(struct ctl_table_header *header);
290
291#endif
292