Commit | Line | Data |
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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> |
a0a53c8b | 19 | |
457c4cbc | 20 | struct proc_dir_entry; |
2774c7ab | 21 | struct net_device; |
97c53cac | 22 | struct sock; |
1597fbc0 | 23 | struct ctl_table_header; |
dec827d1 | 24 | struct net_generic; |
1597fbc0 | 25 | |
5f256bec EB |
26 | struct net { |
27 | atomic_t count; /* To decided when the network | |
28 | * namespace should be freed. | |
29 | */ | |
5d1e4468 | 30 | #ifdef NETNS_REFCNT_DEBUG |
5f256bec EB |
31 | atomic_t use_count; /* To track references we |
32 | * destroy on demand | |
33 | */ | |
5d1e4468 | 34 | #endif |
5f256bec EB |
35 | struct list_head list; /* list of network namespaces */ |
36 | struct work_struct work; /* work struct for freeing */ | |
457c4cbc EB |
37 | |
38 | struct proc_dir_entry *proc_net; | |
39 | struct proc_dir_entry *proc_net_stat; | |
881d966b | 40 | |
73455092 AV |
41 | #ifdef CONFIG_SYSCTL |
42 | struct ctl_table_set sysctls; | |
43 | #endif | |
95bdfccb | 44 | |
2774c7ab EB |
45 | struct net_device *loopback_dev; /* The loopback */ |
46 | ||
881d966b EB |
47 | struct list_head dev_base_head; |
48 | struct hlist_head *dev_name_head; | |
49 | struct hlist_head *dev_index_head; | |
97c53cac | 50 | |
5fd30ee7 DL |
51 | /* core fib_rules */ |
52 | struct list_head rules_ops; | |
53 | spinlock_t rules_mod_lock; | |
54 | ||
97c53cac | 55 | struct sock *rtnl; /* rtnetlink socket */ |
d12d01d6 | 56 | |
8efa6e93 | 57 | struct netns_core core; |
852566f5 | 58 | struct netns_mib mib; |
2aaef4e4 | 59 | struct netns_packet packet; |
a0a53c8b | 60 | struct netns_unix unx; |
8afd351c | 61 | struct netns_ipv4 ipv4; |
b0f159db DL |
62 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
63 | struct netns_ipv6 ipv6; | |
64 | #endif | |
67019cc9 PE |
65 | #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) |
66 | struct netns_dccp dccp; | |
67 | #endif | |
8d870052 AD |
68 | #ifdef CONFIG_NETFILTER |
69 | struct netns_xt xt; | |
70 | #endif | |
dec827d1 | 71 | struct net_generic *gen; |
5f256bec EB |
72 | }; |
73 | ||
225c0a01 | 74 | |
c0f39322 DL |
75 | #include <linux/seq_file_net.h> |
76 | ||
4fabcd71 | 77 | /* Init's network namespace */ |
5f256bec | 78 | extern struct net init_net; |
a4aa834a DL |
79 | |
80 | #ifdef CONFIG_NET | |
4fabcd71 | 81 | #define INIT_NET_NS(net_ns) .net_ns = &init_net, |
4fabcd71 | 82 | |
9dd776b6 | 83 | extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); |
225c0a01 DL |
84 | |
85 | #else /* CONFIG_NET */ | |
86 | ||
87 | #define INIT_NET_NS(net_ns) | |
88 | ||
9dd776b6 EB |
89 | static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) |
90 | { | |
91 | /* There is nothing to copy so this is a noop */ | |
92 | return net_ns; | |
93 | } | |
225c0a01 DL |
94 | #endif /* CONFIG_NET */ |
95 | ||
96 | ||
97 | extern struct list_head net_namespace_list; | |
9dd776b6 | 98 | |
d4655795 | 99 | #ifdef CONFIG_NET_NS |
5f256bec EB |
100 | extern void __put_net(struct net *net); |
101 | ||
b9f75f45 EB |
102 | static inline int net_alive(struct net *net) |
103 | { | |
104 | return net && atomic_read(&net->count); | |
105 | } | |
106 | ||
5f256bec EB |
107 | static inline struct net *get_net(struct net *net) |
108 | { | |
109 | atomic_inc(&net->count); | |
110 | return net; | |
111 | } | |
112 | ||
077130c0 EB |
113 | static inline struct net *maybe_get_net(struct net *net) |
114 | { | |
115 | /* Used when we know struct net exists but we | |
116 | * aren't guaranteed a previous reference count | |
117 | * exists. If the reference count is zero this | |
118 | * function fails and returns NULL. | |
119 | */ | |
120 | if (!atomic_inc_not_zero(&net->count)) | |
121 | net = NULL; | |
122 | return net; | |
123 | } | |
124 | ||
5f256bec EB |
125 | static inline void put_net(struct net *net) |
126 | { | |
127 | if (atomic_dec_and_test(&net->count)) | |
128 | __put_net(net); | |
129 | } | |
130 | ||
878628fb YH |
131 | static inline |
132 | int net_eq(const struct net *net1, const struct net *net2) | |
133 | { | |
134 | return net1 == net2; | |
135 | } | |
d4655795 | 136 | #else |
b9f75f45 EB |
137 | |
138 | static inline int net_alive(struct net *net) | |
139 | { | |
140 | return 1; | |
141 | } | |
142 | ||
d4655795 PE |
143 | static inline struct net *get_net(struct net *net) |
144 | { | |
145 | return net; | |
146 | } | |
147 | ||
148 | static inline void put_net(struct net *net) | |
149 | { | |
150 | } | |
151 | ||
5d1e4468 DL |
152 | static inline struct net *maybe_get_net(struct net *net) |
153 | { | |
154 | return net; | |
155 | } | |
156 | ||
157 | static inline | |
158 | int net_eq(const struct net *net1, const struct net *net2) | |
159 | { | |
160 | return 1; | |
161 | } | |
162 | #endif | |
163 | ||
164 | ||
165 | #ifdef NETNS_REFCNT_DEBUG | |
d4655795 PE |
166 | static inline struct net *hold_net(struct net *net) |
167 | { | |
5d1e4468 DL |
168 | if (net) |
169 | atomic_inc(&net->use_count); | |
d4655795 PE |
170 | return net; |
171 | } | |
172 | ||
173 | static inline void release_net(struct net *net) | |
174 | { | |
5d1e4468 DL |
175 | if (net) |
176 | atomic_dec(&net->use_count); | |
d4655795 | 177 | } |
5d1e4468 DL |
178 | #else |
179 | static inline struct net *hold_net(struct net *net) | |
d4655795 PE |
180 | { |
181 | return net; | |
182 | } | |
878628fb | 183 | |
5d1e4468 | 184 | static inline void release_net(struct net *net) |
878628fb | 185 | { |
878628fb | 186 | } |
d4655795 | 187 | #endif |
5f256bec | 188 | |
5d1e4468 | 189 | |
5f256bec EB |
190 | #define for_each_net(VAR) \ |
191 | list_for_each_entry(VAR, &net_namespace_list, list) | |
192 | ||
4665079c PE |
193 | #ifdef CONFIG_NET_NS |
194 | #define __net_init | |
195 | #define __net_exit | |
022cbae6 | 196 | #define __net_initdata |
4665079c PE |
197 | #else |
198 | #define __net_init __init | |
199 | #define __net_exit __exit_refok | |
022cbae6 | 200 | #define __net_initdata __initdata |
4665079c | 201 | #endif |
5f256bec EB |
202 | |
203 | struct pernet_operations { | |
204 | struct list_head list; | |
205 | int (*init)(struct net *net); | |
206 | void (*exit)(struct net *net); | |
207 | }; | |
208 | ||
209 | extern int register_pernet_subsys(struct pernet_operations *); | |
210 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
211 | extern int register_pernet_device(struct pernet_operations *); | |
212 | extern void unregister_pernet_device(struct pernet_operations *); | |
c93cf61f PE |
213 | extern int register_pernet_gen_device(int *id, struct pernet_operations *); |
214 | extern void unregister_pernet_gen_device(int id, struct pernet_operations *); | |
5f256bec | 215 | |
95bdfccb EB |
216 | struct ctl_path; |
217 | struct ctl_table; | |
218 | struct ctl_table_header; | |
d62c612e | 219 | |
95bdfccb EB |
220 | extern struct ctl_table_header *register_net_sysctl_table(struct net *net, |
221 | const struct ctl_path *path, struct ctl_table *table); | |
d62c612e PE |
222 | extern struct ctl_table_header *register_net_sysctl_rotable( |
223 | const struct ctl_path *path, struct ctl_table *table); | |
95bdfccb EB |
224 | extern void unregister_net_sysctl_table(struct ctl_table_header *header); |
225 | ||
5f256bec | 226 | #endif /* __NET_NET_NAMESPACE_H */ |