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 | ||
a0a53c8b | 11 | #include <net/netns/unix.h> |
2aaef4e4 | 12 | #include <net/netns/packet.h> |
8afd351c | 13 | #include <net/netns/ipv4.h> |
b0f159db | 14 | #include <net/netns/ipv6.h> |
8d870052 | 15 | #include <net/netns/x_tables.h> |
a0a53c8b | 16 | |
457c4cbc | 17 | struct proc_dir_entry; |
2774c7ab | 18 | struct net_device; |
97c53cac | 19 | struct sock; |
1597fbc0 PE |
20 | struct ctl_table_header; |
21 | ||
5f256bec EB |
22 | struct net { |
23 | atomic_t count; /* To decided when the network | |
24 | * namespace should be freed. | |
25 | */ | |
26 | atomic_t use_count; /* To track references we | |
27 | * destroy on demand | |
28 | */ | |
29 | struct list_head list; /* list of network namespaces */ | |
30 | struct work_struct work; /* work struct for freeing */ | |
457c4cbc EB |
31 | |
32 | struct proc_dir_entry *proc_net; | |
33 | struct proc_dir_entry *proc_net_stat; | |
34 | struct proc_dir_entry *proc_net_root; | |
881d966b | 35 | |
95bdfccb EB |
36 | struct list_head sysctl_table_headers; |
37 | ||
2774c7ab EB |
38 | struct net_device *loopback_dev; /* The loopback */ |
39 | ||
881d966b EB |
40 | struct list_head dev_base_head; |
41 | struct hlist_head *dev_name_head; | |
42 | struct hlist_head *dev_index_head; | |
97c53cac | 43 | |
5fd30ee7 DL |
44 | /* core fib_rules */ |
45 | struct list_head rules_ops; | |
46 | spinlock_t rules_mod_lock; | |
47 | ||
97c53cac | 48 | struct sock *rtnl; /* rtnetlink socket */ |
d12d01d6 | 49 | |
024626e3 PE |
50 | /* core sysctls */ |
51 | struct ctl_table_header *sysctl_core_hdr; | |
b8e1f9b5 | 52 | int sysctl_somaxconn; |
024626e3 | 53 | |
2aaef4e4 | 54 | struct netns_packet packet; |
a0a53c8b | 55 | struct netns_unix unx; |
8afd351c | 56 | struct netns_ipv4 ipv4; |
b0f159db DL |
57 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
58 | struct netns_ipv6 ipv6; | |
59 | #endif | |
8d870052 AD |
60 | #ifdef CONFIG_NETFILTER |
61 | struct netns_xt xt; | |
62 | #endif | |
5f256bec EB |
63 | }; |
64 | ||
4fabcd71 DL |
65 | #ifdef CONFIG_NET |
66 | /* Init's network namespace */ | |
5f256bec | 67 | extern struct net init_net; |
4fabcd71 DL |
68 | #define INIT_NET_NS(net_ns) .net_ns = &init_net, |
69 | #else | |
70 | #define INIT_NET_NS(net_ns) | |
71 | #endif | |
72 | ||
5f256bec EB |
73 | extern struct list_head net_namespace_list; |
74 | ||
9dd776b6 EB |
75 | #ifdef CONFIG_NET |
76 | extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); | |
77 | #else | |
78 | static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) | |
79 | { | |
80 | /* There is nothing to copy so this is a noop */ | |
81 | return net_ns; | |
82 | } | |
83 | #endif | |
84 | ||
d4655795 | 85 | #ifdef CONFIG_NET_NS |
5f256bec EB |
86 | extern void __put_net(struct net *net); |
87 | ||
88 | static inline struct net *get_net(struct net *net) | |
89 | { | |
90 | atomic_inc(&net->count); | |
91 | return net; | |
92 | } | |
93 | ||
077130c0 EB |
94 | static inline struct net *maybe_get_net(struct net *net) |
95 | { | |
96 | /* Used when we know struct net exists but we | |
97 | * aren't guaranteed a previous reference count | |
98 | * exists. If the reference count is zero this | |
99 | * function fails and returns NULL. | |
100 | */ | |
101 | if (!atomic_inc_not_zero(&net->count)) | |
102 | net = NULL; | |
103 | return net; | |
104 | } | |
105 | ||
5f256bec EB |
106 | static inline void put_net(struct net *net) |
107 | { | |
108 | if (atomic_dec_and_test(&net->count)) | |
109 | __put_net(net); | |
110 | } | |
111 | ||
112 | static inline struct net *hold_net(struct net *net) | |
113 | { | |
114 | atomic_inc(&net->use_count); | |
115 | return net; | |
116 | } | |
117 | ||
118 | static inline void release_net(struct net *net) | |
119 | { | |
120 | atomic_dec(&net->use_count); | |
121 | } | |
d4655795 PE |
122 | #else |
123 | static inline struct net *get_net(struct net *net) | |
124 | { | |
125 | return net; | |
126 | } | |
127 | ||
128 | static inline void put_net(struct net *net) | |
129 | { | |
130 | } | |
131 | ||
132 | static inline struct net *hold_net(struct net *net) | |
133 | { | |
134 | return net; | |
135 | } | |
136 | ||
137 | static inline void release_net(struct net *net) | |
138 | { | |
139 | } | |
140 | ||
141 | static inline struct net *maybe_get_net(struct net *net) | |
142 | { | |
143 | return net; | |
144 | } | |
145 | #endif | |
5f256bec | 146 | |
5f256bec EB |
147 | #define for_each_net(VAR) \ |
148 | list_for_each_entry(VAR, &net_namespace_list, list) | |
149 | ||
4665079c PE |
150 | #ifdef CONFIG_NET_NS |
151 | #define __net_init | |
152 | #define __net_exit | |
022cbae6 | 153 | #define __net_initdata |
4665079c PE |
154 | #else |
155 | #define __net_init __init | |
156 | #define __net_exit __exit_refok | |
022cbae6 | 157 | #define __net_initdata __initdata |
4665079c | 158 | #endif |
5f256bec EB |
159 | |
160 | struct pernet_operations { | |
161 | struct list_head list; | |
162 | int (*init)(struct net *net); | |
163 | void (*exit)(struct net *net); | |
164 | }; | |
165 | ||
166 | extern int register_pernet_subsys(struct pernet_operations *); | |
167 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
168 | extern int register_pernet_device(struct pernet_operations *); | |
169 | extern void unregister_pernet_device(struct pernet_operations *); | |
170 | ||
95bdfccb EB |
171 | struct ctl_path; |
172 | struct ctl_table; | |
173 | struct ctl_table_header; | |
174 | extern struct ctl_table_header *register_net_sysctl_table(struct net *net, | |
175 | const struct ctl_path *path, struct ctl_table *table); | |
176 | extern void unregister_net_sysctl_table(struct ctl_table_header *header); | |
177 | ||
5f256bec | 178 | #endif /* __NET_NET_NAMESPACE_H */ |