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