Commit | Line | Data |
---|---|---|
5f256bec EB |
1 | /* |
2 | * Operations on the network namespace | |
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 | ||
8efa6e93 | 11 | #include <net/netns/core.h> |
852566f5 | 12 | #include <net/netns/mib.h> |
a0a53c8b | 13 | #include <net/netns/unix.h> |
2aaef4e4 | 14 | #include <net/netns/packet.h> |
8afd351c | 15 | #include <net/netns/ipv4.h> |
b0f159db | 16 | #include <net/netns/ipv6.h> |
67019cc9 | 17 | #include <net/netns/dccp.h> |
8d870052 | 18 | #include <net/netns/x_tables.h> |
dfdb8d79 AD |
19 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
20 | #include <net/netns/conntrack.h> | |
21 | #endif | |
d62ddc21 | 22 | #include <net/netns/xfrm.h> |
a0a53c8b | 23 | |
457c4cbc | 24 | struct proc_dir_entry; |
2774c7ab | 25 | struct net_device; |
97c53cac | 26 | struct sock; |
1597fbc0 | 27 | struct ctl_table_header; |
dec827d1 | 28 | struct net_generic; |
1597fbc0 | 29 | |
5f256bec EB |
30 | struct net { |
31 | atomic_t count; /* To decided when the network | |
32 | * namespace should be freed. | |
33 | */ | |
5d1e4468 | 34 | #ifdef NETNS_REFCNT_DEBUG |
5f256bec EB |
35 | atomic_t use_count; /* To track references we |
36 | * destroy on demand | |
37 | */ | |
5d1e4468 | 38 | #endif |
5f256bec EB |
39 | struct list_head list; /* list of network namespaces */ |
40 | struct work_struct work; /* work struct for freeing */ | |
457c4cbc EB |
41 | |
42 | struct proc_dir_entry *proc_net; | |
43 | struct proc_dir_entry *proc_net_stat; | |
881d966b | 44 | |
73455092 AV |
45 | #ifdef CONFIG_SYSCTL |
46 | struct ctl_table_set sysctls; | |
47 | #endif | |
95bdfccb | 48 | |
2774c7ab EB |
49 | struct net_device *loopback_dev; /* The loopback */ |
50 | ||
881d966b EB |
51 | struct list_head dev_base_head; |
52 | struct hlist_head *dev_name_head; | |
53 | struct hlist_head *dev_index_head; | |
97c53cac | 54 | |
5fd30ee7 DL |
55 | /* core fib_rules */ |
56 | struct list_head rules_ops; | |
57 | spinlock_t rules_mod_lock; | |
58 | ||
97c53cac | 59 | struct sock *rtnl; /* rtnetlink socket */ |
d12d01d6 | 60 | |
8efa6e93 | 61 | struct netns_core core; |
852566f5 | 62 | struct netns_mib mib; |
2aaef4e4 | 63 | struct netns_packet packet; |
a0a53c8b | 64 | struct netns_unix unx; |
8afd351c | 65 | struct netns_ipv4 ipv4; |
b0f159db DL |
66 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
67 | struct netns_ipv6 ipv6; | |
68 | #endif | |
67019cc9 PE |
69 | #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) |
70 | struct netns_dccp dccp; | |
71 | #endif | |
8d870052 AD |
72 | #ifdef CONFIG_NETFILTER |
73 | struct netns_xt xt; | |
dfdb8d79 AD |
74 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
75 | struct netns_ct ct; | |
76 | #endif | |
d62ddc21 AD |
77 | #endif |
78 | #ifdef CONFIG_XFRM | |
79 | struct netns_xfrm xfrm; | |
8d870052 | 80 | #endif |
dec827d1 | 81 | struct net_generic *gen; |
5f256bec EB |
82 | }; |
83 | ||
225c0a01 | 84 | |
c0f39322 DL |
85 | #include <linux/seq_file_net.h> |
86 | ||
4fabcd71 | 87 | /* Init's network namespace */ |
5f256bec | 88 | extern struct net init_net; |
a4aa834a DL |
89 | |
90 | #ifdef CONFIG_NET | |
4fabcd71 | 91 | #define INIT_NET_NS(net_ns) .net_ns = &init_net, |
4fabcd71 | 92 | |
9dd776b6 | 93 | extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); |
225c0a01 DL |
94 | |
95 | #else /* CONFIG_NET */ | |
96 | ||
97 | #define INIT_NET_NS(net_ns) | |
98 | ||
9dd776b6 EB |
99 | static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) |
100 | { | |
101 | /* There is nothing to copy so this is a noop */ | |
102 | return net_ns; | |
103 | } | |
225c0a01 DL |
104 | #endif /* CONFIG_NET */ |
105 | ||
106 | ||
107 | extern struct list_head net_namespace_list; | |
9dd776b6 | 108 | |
d4655795 | 109 | #ifdef CONFIG_NET_NS |
5f256bec EB |
110 | extern void __put_net(struct net *net); |
111 | ||
b9f75f45 EB |
112 | static inline int net_alive(struct net *net) |
113 | { | |
114 | return net && atomic_read(&net->count); | |
115 | } | |
116 | ||
5f256bec EB |
117 | static inline struct net *get_net(struct net *net) |
118 | { | |
119 | atomic_inc(&net->count); | |
120 | return net; | |
121 | } | |
122 | ||
077130c0 EB |
123 | static inline struct net *maybe_get_net(struct net *net) |
124 | { | |
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. | |
129 | */ | |
130 | if (!atomic_inc_not_zero(&net->count)) | |
131 | net = NULL; | |
132 | return net; | |
133 | } | |
134 | ||
5f256bec EB |
135 | static inline void put_net(struct net *net) |
136 | { | |
137 | if (atomic_dec_and_test(&net->count)) | |
138 | __put_net(net); | |
139 | } | |
140 | ||
878628fb YH |
141 | static inline |
142 | int net_eq(const struct net *net1, const struct net *net2) | |
143 | { | |
144 | return net1 == net2; | |
145 | } | |
d4655795 | 146 | #else |
b9f75f45 EB |
147 | |
148 | static inline int net_alive(struct net *net) | |
149 | { | |
150 | return 1; | |
151 | } | |
152 | ||
d4655795 PE |
153 | static inline struct net *get_net(struct net *net) |
154 | { | |
155 | return net; | |
156 | } | |
157 | ||
158 | static inline void put_net(struct net *net) | |
159 | { | |
160 | } | |
161 | ||
5d1e4468 DL |
162 | static inline struct net *maybe_get_net(struct net *net) |
163 | { | |
164 | return net; | |
165 | } | |
166 | ||
167 | static inline | |
168 | int net_eq(const struct net *net1, const struct net *net2) | |
169 | { | |
170 | return 1; | |
171 | } | |
172 | #endif | |
173 | ||
174 | ||
175 | #ifdef NETNS_REFCNT_DEBUG | |
d4655795 PE |
176 | static inline struct net *hold_net(struct net *net) |
177 | { | |
5d1e4468 DL |
178 | if (net) |
179 | atomic_inc(&net->use_count); | |
d4655795 PE |
180 | return net; |
181 | } | |
182 | ||
183 | static inline void release_net(struct net *net) | |
184 | { | |
5d1e4468 DL |
185 | if (net) |
186 | atomic_dec(&net->use_count); | |
d4655795 | 187 | } |
5d1e4468 DL |
188 | #else |
189 | static inline struct net *hold_net(struct net *net) | |
d4655795 PE |
190 | { |
191 | return net; | |
192 | } | |
878628fb | 193 | |
5d1e4468 | 194 | static inline void release_net(struct net *net) |
878628fb | 195 | { |
878628fb | 196 | } |
d4655795 | 197 | #endif |
5f256bec | 198 | |
8f424b5f ED |
199 | #ifdef CONFIG_NET_NS |
200 | ||
201 | static inline void write_pnet(struct net **pnet, struct net *net) | |
202 | { | |
203 | *pnet = net; | |
204 | } | |
205 | ||
206 | static inline struct net *read_pnet(struct net * const *pnet) | |
207 | { | |
208 | return *pnet; | |
209 | } | |
210 | ||
211 | #else | |
212 | ||
213 | #define write_pnet(pnet, net) do { (void)(net);} while (0) | |
214 | #define read_pnet(pnet) (&init_net) | |
215 | ||
216 | #endif | |
5d1e4468 | 217 | |
5f256bec EB |
218 | #define for_each_net(VAR) \ |
219 | list_for_each_entry(VAR, &net_namespace_list, list) | |
220 | ||
4665079c PE |
221 | #ifdef CONFIG_NET_NS |
222 | #define __net_init | |
223 | #define __net_exit | |
022cbae6 | 224 | #define __net_initdata |
4665079c PE |
225 | #else |
226 | #define __net_init __init | |
227 | #define __net_exit __exit_refok | |
022cbae6 | 228 | #define __net_initdata __initdata |
4665079c | 229 | #endif |
5f256bec EB |
230 | |
231 | struct pernet_operations { | |
232 | struct list_head list; | |
233 | int (*init)(struct net *net); | |
234 | void (*exit)(struct net *net); | |
235 | }; | |
236 | ||
237 | extern int register_pernet_subsys(struct pernet_operations *); | |
238 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
485ac57b AD |
239 | extern int register_pernet_gen_subsys(int *id, struct pernet_operations *); |
240 | extern void unregister_pernet_gen_subsys(int id, struct pernet_operations *); | |
5f256bec EB |
241 | extern int register_pernet_device(struct pernet_operations *); |
242 | extern void unregister_pernet_device(struct pernet_operations *); | |
c93cf61f PE |
243 | extern int register_pernet_gen_device(int *id, struct pernet_operations *); |
244 | extern void unregister_pernet_gen_device(int id, struct pernet_operations *); | |
5f256bec | 245 | |
95bdfccb EB |
246 | struct ctl_path; |
247 | struct ctl_table; | |
248 | struct ctl_table_header; | |
d62c612e | 249 | |
95bdfccb EB |
250 | extern struct ctl_table_header *register_net_sysctl_table(struct net *net, |
251 | const struct ctl_path *path, struct ctl_table *table); | |
d62c612e PE |
252 | extern struct ctl_table_header *register_net_sysctl_rotable( |
253 | const struct ctl_path *path, struct ctl_table *table); | |
95bdfccb EB |
254 | extern void unregister_net_sysctl_table(struct ctl_table_header *header); |
255 | ||
5f256bec | 256 | #endif /* __NET_NET_NAMESPACE_H */ |