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> |
dfdb8d79 AD |
19 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
20 | #include <net/netns/conntrack.h> | |
21 | #endif | |
a0a53c8b | 22 | |
457c4cbc | 23 | struct proc_dir_entry; |
2774c7ab | 24 | struct net_device; |
97c53cac | 25 | struct sock; |
1597fbc0 | 26 | struct ctl_table_header; |
dec827d1 | 27 | struct net_generic; |
1597fbc0 | 28 | |
5f256bec EB |
29 | struct net { |
30 | atomic_t count; /* To decided when the network | |
31 | * namespace should be freed. | |
32 | */ | |
5d1e4468 | 33 | #ifdef NETNS_REFCNT_DEBUG |
5f256bec EB |
34 | atomic_t use_count; /* To track references we |
35 | * destroy on demand | |
36 | */ | |
5d1e4468 | 37 | #endif |
5f256bec EB |
38 | struct list_head list; /* list of network namespaces */ |
39 | struct work_struct work; /* work struct for freeing */ | |
457c4cbc EB |
40 | |
41 | struct proc_dir_entry *proc_net; | |
42 | struct proc_dir_entry *proc_net_stat; | |
881d966b | 43 | |
73455092 AV |
44 | #ifdef CONFIG_SYSCTL |
45 | struct ctl_table_set sysctls; | |
46 | #endif | |
95bdfccb | 47 | |
2774c7ab EB |
48 | struct net_device *loopback_dev; /* The loopback */ |
49 | ||
881d966b EB |
50 | struct list_head dev_base_head; |
51 | struct hlist_head *dev_name_head; | |
52 | struct hlist_head *dev_index_head; | |
97c53cac | 53 | |
5fd30ee7 DL |
54 | /* core fib_rules */ |
55 | struct list_head rules_ops; | |
56 | spinlock_t rules_mod_lock; | |
57 | ||
97c53cac | 58 | struct sock *rtnl; /* rtnetlink socket */ |
d12d01d6 | 59 | |
8efa6e93 | 60 | struct netns_core core; |
852566f5 | 61 | struct netns_mib mib; |
2aaef4e4 | 62 | struct netns_packet packet; |
a0a53c8b | 63 | struct netns_unix unx; |
8afd351c | 64 | struct netns_ipv4 ipv4; |
b0f159db DL |
65 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
66 | struct netns_ipv6 ipv6; | |
67 | #endif | |
67019cc9 PE |
68 | #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) |
69 | struct netns_dccp dccp; | |
70 | #endif | |
8d870052 AD |
71 | #ifdef CONFIG_NETFILTER |
72 | struct netns_xt xt; | |
dfdb8d79 AD |
73 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
74 | struct netns_ct ct; | |
75 | #endif | |
8d870052 | 76 | #endif |
dec827d1 | 77 | struct net_generic *gen; |
5f256bec EB |
78 | }; |
79 | ||
225c0a01 | 80 | |
c0f39322 DL |
81 | #include <linux/seq_file_net.h> |
82 | ||
4fabcd71 | 83 | /* Init's network namespace */ |
5f256bec | 84 | extern struct net init_net; |
a4aa834a DL |
85 | |
86 | #ifdef CONFIG_NET | |
4fabcd71 | 87 | #define INIT_NET_NS(net_ns) .net_ns = &init_net, |
4fabcd71 | 88 | |
9dd776b6 | 89 | extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); |
225c0a01 DL |
90 | |
91 | #else /* CONFIG_NET */ | |
92 | ||
93 | #define INIT_NET_NS(net_ns) | |
94 | ||
9dd776b6 EB |
95 | static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) |
96 | { | |
97 | /* There is nothing to copy so this is a noop */ | |
98 | return net_ns; | |
99 | } | |
225c0a01 DL |
100 | #endif /* CONFIG_NET */ |
101 | ||
102 | ||
103 | extern struct list_head net_namespace_list; | |
9dd776b6 | 104 | |
d4655795 | 105 | #ifdef CONFIG_NET_NS |
5f256bec EB |
106 | extern void __put_net(struct net *net); |
107 | ||
b9f75f45 EB |
108 | static inline int net_alive(struct net *net) |
109 | { | |
110 | return net && atomic_read(&net->count); | |
111 | } | |
112 | ||
5f256bec EB |
113 | static inline struct net *get_net(struct net *net) |
114 | { | |
115 | atomic_inc(&net->count); | |
116 | return net; | |
117 | } | |
118 | ||
077130c0 EB |
119 | static inline struct net *maybe_get_net(struct net *net) |
120 | { | |
121 | /* Used when we know struct net exists but we | |
122 | * aren't guaranteed a previous reference count | |
123 | * exists. If the reference count is zero this | |
124 | * function fails and returns NULL. | |
125 | */ | |
126 | if (!atomic_inc_not_zero(&net->count)) | |
127 | net = NULL; | |
128 | return net; | |
129 | } | |
130 | ||
5f256bec EB |
131 | static inline void put_net(struct net *net) |
132 | { | |
133 | if (atomic_dec_and_test(&net->count)) | |
134 | __put_net(net); | |
135 | } | |
136 | ||
878628fb YH |
137 | static inline |
138 | int net_eq(const struct net *net1, const struct net *net2) | |
139 | { | |
140 | return net1 == net2; | |
141 | } | |
d4655795 | 142 | #else |
b9f75f45 EB |
143 | |
144 | static inline int net_alive(struct net *net) | |
145 | { | |
146 | return 1; | |
147 | } | |
148 | ||
d4655795 PE |
149 | static inline struct net *get_net(struct net *net) |
150 | { | |
151 | return net; | |
152 | } | |
153 | ||
154 | static inline void put_net(struct net *net) | |
155 | { | |
156 | } | |
157 | ||
5d1e4468 DL |
158 | static inline struct net *maybe_get_net(struct net *net) |
159 | { | |
160 | return net; | |
161 | } | |
162 | ||
163 | static inline | |
164 | int net_eq(const struct net *net1, const struct net *net2) | |
165 | { | |
166 | return 1; | |
167 | } | |
168 | #endif | |
169 | ||
170 | ||
171 | #ifdef NETNS_REFCNT_DEBUG | |
d4655795 PE |
172 | static inline struct net *hold_net(struct net *net) |
173 | { | |
5d1e4468 DL |
174 | if (net) |
175 | atomic_inc(&net->use_count); | |
d4655795 PE |
176 | return net; |
177 | } | |
178 | ||
179 | static inline void release_net(struct net *net) | |
180 | { | |
5d1e4468 DL |
181 | if (net) |
182 | atomic_dec(&net->use_count); | |
d4655795 | 183 | } |
5d1e4468 DL |
184 | #else |
185 | static inline struct net *hold_net(struct net *net) | |
d4655795 PE |
186 | { |
187 | return net; | |
188 | } | |
878628fb | 189 | |
5d1e4468 | 190 | static inline void release_net(struct net *net) |
878628fb | 191 | { |
878628fb | 192 | } |
d4655795 | 193 | #endif |
5f256bec | 194 | |
5d1e4468 | 195 | |
5f256bec EB |
196 | #define for_each_net(VAR) \ |
197 | list_for_each_entry(VAR, &net_namespace_list, list) | |
198 | ||
4665079c PE |
199 | #ifdef CONFIG_NET_NS |
200 | #define __net_init | |
201 | #define __net_exit | |
022cbae6 | 202 | #define __net_initdata |
4665079c PE |
203 | #else |
204 | #define __net_init __init | |
205 | #define __net_exit __exit_refok | |
022cbae6 | 206 | #define __net_initdata __initdata |
4665079c | 207 | #endif |
5f256bec EB |
208 | |
209 | struct pernet_operations { | |
210 | struct list_head list; | |
211 | int (*init)(struct net *net); | |
212 | void (*exit)(struct net *net); | |
213 | }; | |
214 | ||
215 | extern int register_pernet_subsys(struct pernet_operations *); | |
216 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
485ac57b AD |
217 | extern int register_pernet_gen_subsys(int *id, struct pernet_operations *); |
218 | extern void unregister_pernet_gen_subsys(int id, struct pernet_operations *); | |
5f256bec EB |
219 | extern int register_pernet_device(struct pernet_operations *); |
220 | extern void unregister_pernet_device(struct pernet_operations *); | |
c93cf61f PE |
221 | extern int register_pernet_gen_device(int *id, struct pernet_operations *); |
222 | extern void unregister_pernet_gen_device(int id, struct pernet_operations *); | |
5f256bec | 223 | |
95bdfccb EB |
224 | struct ctl_path; |
225 | struct ctl_table; | |
226 | struct ctl_table_header; | |
d62c612e | 227 | |
95bdfccb EB |
228 | extern struct ctl_table_header *register_net_sysctl_table(struct net *net, |
229 | const struct ctl_path *path, struct ctl_table *table); | |
d62c612e PE |
230 | extern struct ctl_table_header *register_net_sysctl_rotable( |
231 | const struct ctl_path *path, struct ctl_table *table); | |
95bdfccb EB |
232 | extern void unregister_net_sysctl_table(struct ctl_table_header *header); |
233 | ||
5f256bec | 234 | #endif /* __NET_NET_NAMESPACE_H */ |