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> |
a0a53c8b | 12 | #include <net/netns/unix.h> |
2aaef4e4 | 13 | #include <net/netns/packet.h> |
8afd351c | 14 | #include <net/netns/ipv4.h> |
b0f159db | 15 | #include <net/netns/ipv6.h> |
67019cc9 | 16 | #include <net/netns/dccp.h> |
8d870052 | 17 | #include <net/netns/x_tables.h> |
a0a53c8b | 18 | |
457c4cbc | 19 | struct proc_dir_entry; |
2774c7ab | 20 | struct net_device; |
97c53cac | 21 | struct sock; |
1597fbc0 | 22 | struct ctl_table_header; |
dec827d1 | 23 | struct net_generic; |
1597fbc0 | 24 | |
5f256bec EB |
25 | struct net { |
26 | atomic_t count; /* To decided when the network | |
27 | * namespace should be freed. | |
28 | */ | |
5d1e4468 | 29 | #ifdef NETNS_REFCNT_DEBUG |
5f256bec EB |
30 | atomic_t use_count; /* To track references we |
31 | * destroy on demand | |
32 | */ | |
5d1e4468 | 33 | #endif |
5f256bec EB |
34 | struct list_head list; /* list of network namespaces */ |
35 | struct work_struct work; /* work struct for freeing */ | |
457c4cbc EB |
36 | |
37 | struct proc_dir_entry *proc_net; | |
38 | struct proc_dir_entry *proc_net_stat; | |
881d966b | 39 | |
95bdfccb EB |
40 | struct list_head sysctl_table_headers; |
41 | ||
2774c7ab EB |
42 | struct net_device *loopback_dev; /* The loopback */ |
43 | ||
881d966b EB |
44 | struct list_head dev_base_head; |
45 | struct hlist_head *dev_name_head; | |
46 | struct hlist_head *dev_index_head; | |
97c53cac | 47 | |
5fd30ee7 DL |
48 | /* core fib_rules */ |
49 | struct list_head rules_ops; | |
50 | spinlock_t rules_mod_lock; | |
51 | ||
97c53cac | 52 | struct sock *rtnl; /* rtnetlink socket */ |
d12d01d6 | 53 | |
8efa6e93 | 54 | struct netns_core core; |
2aaef4e4 | 55 | struct netns_packet packet; |
a0a53c8b | 56 | struct netns_unix unx; |
8afd351c | 57 | struct netns_ipv4 ipv4; |
b0f159db DL |
58 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
59 | struct netns_ipv6 ipv6; | |
60 | #endif | |
67019cc9 PE |
61 | #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) |
62 | struct netns_dccp dccp; | |
63 | #endif | |
8d870052 AD |
64 | #ifdef CONFIG_NETFILTER |
65 | struct netns_xt xt; | |
66 | #endif | |
dec827d1 | 67 | struct net_generic *gen; |
5f256bec EB |
68 | }; |
69 | ||
225c0a01 | 70 | |
c0f39322 DL |
71 | #include <linux/seq_file_net.h> |
72 | ||
4fabcd71 | 73 | /* Init's network namespace */ |
5f256bec | 74 | extern struct net init_net; |
a4aa834a DL |
75 | |
76 | #ifdef CONFIG_NET | |
4fabcd71 | 77 | #define INIT_NET_NS(net_ns) .net_ns = &init_net, |
4fabcd71 | 78 | |
9dd776b6 | 79 | extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); |
225c0a01 DL |
80 | |
81 | #else /* CONFIG_NET */ | |
82 | ||
83 | #define INIT_NET_NS(net_ns) | |
84 | ||
9dd776b6 EB |
85 | static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) |
86 | { | |
87 | /* There is nothing to copy so this is a noop */ | |
88 | return net_ns; | |
89 | } | |
225c0a01 DL |
90 | #endif /* CONFIG_NET */ |
91 | ||
92 | ||
93 | extern struct list_head net_namespace_list; | |
9dd776b6 | 94 | |
d4655795 | 95 | #ifdef CONFIG_NET_NS |
5f256bec EB |
96 | extern void __put_net(struct net *net); |
97 | ||
b9f75f45 EB |
98 | static inline int net_alive(struct net *net) |
99 | { | |
100 | return net && atomic_read(&net->count); | |
101 | } | |
102 | ||
5f256bec EB |
103 | static inline struct net *get_net(struct net *net) |
104 | { | |
105 | atomic_inc(&net->count); | |
106 | return net; | |
107 | } | |
108 | ||
077130c0 EB |
109 | static inline struct net *maybe_get_net(struct net *net) |
110 | { | |
111 | /* Used when we know struct net exists but we | |
112 | * aren't guaranteed a previous reference count | |
113 | * exists. If the reference count is zero this | |
114 | * function fails and returns NULL. | |
115 | */ | |
116 | if (!atomic_inc_not_zero(&net->count)) | |
117 | net = NULL; | |
118 | return net; | |
119 | } | |
120 | ||
5f256bec EB |
121 | static inline void put_net(struct net *net) |
122 | { | |
123 | if (atomic_dec_and_test(&net->count)) | |
124 | __put_net(net); | |
125 | } | |
126 | ||
878628fb YH |
127 | static inline |
128 | int net_eq(const struct net *net1, const struct net *net2) | |
129 | { | |
130 | return net1 == net2; | |
131 | } | |
d4655795 | 132 | #else |
b9f75f45 EB |
133 | |
134 | static inline int net_alive(struct net *net) | |
135 | { | |
136 | return 1; | |
137 | } | |
138 | ||
d4655795 PE |
139 | static inline struct net *get_net(struct net *net) |
140 | { | |
141 | return net; | |
142 | } | |
143 | ||
144 | static inline void put_net(struct net *net) | |
145 | { | |
146 | } | |
147 | ||
5d1e4468 DL |
148 | static inline struct net *maybe_get_net(struct net *net) |
149 | { | |
150 | return net; | |
151 | } | |
152 | ||
153 | static inline | |
154 | int net_eq(const struct net *net1, const struct net *net2) | |
155 | { | |
156 | return 1; | |
157 | } | |
158 | #endif | |
159 | ||
160 | ||
161 | #ifdef NETNS_REFCNT_DEBUG | |
d4655795 PE |
162 | static inline struct net *hold_net(struct net *net) |
163 | { | |
5d1e4468 DL |
164 | if (net) |
165 | atomic_inc(&net->use_count); | |
d4655795 PE |
166 | return net; |
167 | } | |
168 | ||
169 | static inline void release_net(struct net *net) | |
170 | { | |
5d1e4468 DL |
171 | if (net) |
172 | atomic_dec(&net->use_count); | |
d4655795 | 173 | } |
5d1e4468 DL |
174 | #else |
175 | static inline struct net *hold_net(struct net *net) | |
d4655795 PE |
176 | { |
177 | return net; | |
178 | } | |
878628fb | 179 | |
5d1e4468 | 180 | static inline void release_net(struct net *net) |
878628fb | 181 | { |
878628fb | 182 | } |
d4655795 | 183 | #endif |
5f256bec | 184 | |
5d1e4468 | 185 | |
5f256bec EB |
186 | #define for_each_net(VAR) \ |
187 | list_for_each_entry(VAR, &net_namespace_list, list) | |
188 | ||
4665079c PE |
189 | #ifdef CONFIG_NET_NS |
190 | #define __net_init | |
191 | #define __net_exit | |
022cbae6 | 192 | #define __net_initdata |
4665079c PE |
193 | #else |
194 | #define __net_init __init | |
195 | #define __net_exit __exit_refok | |
022cbae6 | 196 | #define __net_initdata __initdata |
4665079c | 197 | #endif |
5f256bec EB |
198 | |
199 | struct pernet_operations { | |
200 | struct list_head list; | |
201 | int (*init)(struct net *net); | |
202 | void (*exit)(struct net *net); | |
203 | }; | |
204 | ||
205 | extern int register_pernet_subsys(struct pernet_operations *); | |
206 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
207 | extern int register_pernet_device(struct pernet_operations *); | |
208 | extern void unregister_pernet_device(struct pernet_operations *); | |
c93cf61f PE |
209 | extern int register_pernet_gen_device(int *id, struct pernet_operations *); |
210 | extern void unregister_pernet_gen_device(int id, struct pernet_operations *); | |
5f256bec | 211 | |
95bdfccb EB |
212 | struct ctl_path; |
213 | struct ctl_table; | |
214 | struct ctl_table_header; | |
215 | extern struct ctl_table_header *register_net_sysctl_table(struct net *net, | |
216 | const struct ctl_path *path, struct ctl_table *table); | |
217 | extern void unregister_net_sysctl_table(struct ctl_table_header *header); | |
218 | ||
5f256bec | 219 | #endif /* __NET_NET_NAMESPACE_H */ |