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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 | ||
98 | static inline struct net *get_net(struct net *net) | |
99 | { | |
100 | atomic_inc(&net->count); | |
101 | return net; | |
102 | } | |
103 | ||
077130c0 EB |
104 | static inline struct net *maybe_get_net(struct net *net) |
105 | { | |
106 | /* Used when we know struct net exists but we | |
107 | * aren't guaranteed a previous reference count | |
108 | * exists. If the reference count is zero this | |
109 | * function fails and returns NULL. | |
110 | */ | |
111 | if (!atomic_inc_not_zero(&net->count)) | |
112 | net = NULL; | |
113 | return net; | |
114 | } | |
115 | ||
5f256bec EB |
116 | static inline void put_net(struct net *net) |
117 | { | |
118 | if (atomic_dec_and_test(&net->count)) | |
119 | __put_net(net); | |
120 | } | |
121 | ||
878628fb YH |
122 | static inline |
123 | int net_eq(const struct net *net1, const struct net *net2) | |
124 | { | |
125 | return net1 == net2; | |
126 | } | |
d4655795 PE |
127 | #else |
128 | static inline struct net *get_net(struct net *net) | |
129 | { | |
130 | return net; | |
131 | } | |
132 | ||
133 | static inline void put_net(struct net *net) | |
134 | { | |
135 | } | |
136 | ||
5d1e4468 DL |
137 | static inline struct net *maybe_get_net(struct net *net) |
138 | { | |
139 | return net; | |
140 | } | |
141 | ||
142 | static inline | |
143 | int net_eq(const struct net *net1, const struct net *net2) | |
144 | { | |
145 | return 1; | |
146 | } | |
147 | #endif | |
148 | ||
149 | ||
150 | #ifdef NETNS_REFCNT_DEBUG | |
d4655795 PE |
151 | static inline struct net *hold_net(struct net *net) |
152 | { | |
5d1e4468 DL |
153 | if (net) |
154 | atomic_inc(&net->use_count); | |
d4655795 PE |
155 | return net; |
156 | } | |
157 | ||
158 | static inline void release_net(struct net *net) | |
159 | { | |
5d1e4468 DL |
160 | if (net) |
161 | atomic_dec(&net->use_count); | |
d4655795 | 162 | } |
5d1e4468 DL |
163 | #else |
164 | static inline struct net *hold_net(struct net *net) | |
d4655795 PE |
165 | { |
166 | return net; | |
167 | } | |
878628fb | 168 | |
5d1e4468 | 169 | static inline void release_net(struct net *net) |
878628fb | 170 | { |
878628fb | 171 | } |
d4655795 | 172 | #endif |
5f256bec | 173 | |
5d1e4468 | 174 | |
5f256bec EB |
175 | #define for_each_net(VAR) \ |
176 | list_for_each_entry(VAR, &net_namespace_list, list) | |
177 | ||
4665079c PE |
178 | #ifdef CONFIG_NET_NS |
179 | #define __net_init | |
180 | #define __net_exit | |
022cbae6 | 181 | #define __net_initdata |
4665079c PE |
182 | #else |
183 | #define __net_init __init | |
184 | #define __net_exit __exit_refok | |
022cbae6 | 185 | #define __net_initdata __initdata |
4665079c | 186 | #endif |
5f256bec EB |
187 | |
188 | struct pernet_operations { | |
189 | struct list_head list; | |
190 | int (*init)(struct net *net); | |
191 | void (*exit)(struct net *net); | |
192 | }; | |
193 | ||
194 | extern int register_pernet_subsys(struct pernet_operations *); | |
195 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
196 | extern int register_pernet_device(struct pernet_operations *); | |
197 | extern void unregister_pernet_device(struct pernet_operations *); | |
c93cf61f PE |
198 | extern int register_pernet_gen_device(int *id, struct pernet_operations *); |
199 | extern void unregister_pernet_gen_device(int id, struct pernet_operations *); | |
5f256bec | 200 | |
95bdfccb EB |
201 | struct ctl_path; |
202 | struct ctl_table; | |
203 | struct ctl_table_header; | |
204 | extern struct ctl_table_header *register_net_sysctl_table(struct net *net, | |
205 | const struct ctl_path *path, struct ctl_table *table); | |
206 | extern void unregister_net_sysctl_table(struct ctl_table_header *header); | |
207 | ||
5f256bec | 208 | #endif /* __NET_NET_NAMESPACE_H */ |