Commit | Line | Data |
---|---|---|
5f256bec EB |
1 | /* |
2 | * Operations on the network namespace | |
3 | */ | |
4 | #ifndef __NET_NET_NAMESPACE_H | |
5 | #define __NET_NET_NAMESPACE_H | |
6 | ||
60063497 | 7 | #include <linux/atomic.h> |
5f256bec EB |
8 | #include <linux/workqueue.h> |
9 | #include <linux/list.h> | |
bee95250 | 10 | #include <linux/sysctl.h> |
5f256bec | 11 | |
6a662719 | 12 | #include <net/flow.h> |
8efa6e93 | 13 | #include <net/netns/core.h> |
852566f5 | 14 | #include <net/netns/mib.h> |
a0a53c8b | 15 | #include <net/netns/unix.h> |
2aaef4e4 | 16 | #include <net/netns/packet.h> |
8afd351c | 17 | #include <net/netns/ipv4.h> |
b0f159db | 18 | #include <net/netns/ipv6.h> |
633fc86f | 19 | #include <net/netns/ieee802154_6lowpan.h> |
4db67e80 | 20 | #include <net/netns/sctp.h> |
67019cc9 | 21 | #include <net/netns/dccp.h> |
f3c1a44a | 22 | #include <net/netns/netfilter.h> |
8d870052 | 23 | #include <net/netns/x_tables.h> |
dfdb8d79 AD |
24 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
25 | #include <net/netns/conntrack.h> | |
26 | #endif | |
99633ab2 | 27 | #include <net/netns/nftables.h> |
d62ddc21 | 28 | #include <net/netns/xfrm.h> |
0189197f | 29 | #include <net/netns/mpls.h> |
435d5f4b | 30 | #include <linux/ns_common.h> |
04c52dec PNA |
31 | #include <linux/idr.h> |
32 | #include <linux/skbuff.h> | |
a0a53c8b | 33 | |
038e7332 | 34 | struct user_namespace; |
457c4cbc | 35 | struct proc_dir_entry; |
2774c7ab | 36 | struct net_device; |
97c53cac | 37 | struct sock; |
1597fbc0 | 38 | struct ctl_table_header; |
dec827d1 | 39 | struct net_generic; |
134e6375 | 40 | struct sock; |
2553d064 | 41 | struct netns_ipvs; |
1597fbc0 | 42 | |
7c28bd0b ED |
43 | |
44 | #define NETDEV_HASHBITS 8 | |
45 | #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS) | |
46 | ||
5f256bec | 47 | struct net { |
a685e089 AV |
48 | atomic_t passive; /* To decided when the network |
49 | * namespace should be freed. | |
50 | */ | |
5f256bec | 51 | atomic_t count; /* To decided when the network |
a685e089 | 52 | * namespace should be shut down. |
5f256bec | 53 | */ |
8e602ce2 ED |
54 | spinlock_t rules_mod_lock; |
55 | ||
33cf7c90 ED |
56 | atomic64_t cookie_gen; |
57 | ||
5f256bec | 58 | struct list_head list; /* list of network namespaces */ |
2b035b39 | 59 | struct list_head cleanup_list; /* namespaces on death row */ |
72ad937a | 60 | struct list_head exit_list; /* Use only net_mutex */ |
457c4cbc | 61 | |
038e7332 | 62 | struct user_namespace *user_ns; /* Owning user namespace */ |
de133464 | 63 | spinlock_t nsid_lock; |
0c7aecd4 | 64 | struct idr netns_ids; |
038e7332 | 65 | |
435d5f4b | 66 | struct ns_common ns; |
98f842e6 | 67 | |
457c4cbc EB |
68 | struct proc_dir_entry *proc_net; |
69 | struct proc_dir_entry *proc_net_stat; | |
881d966b | 70 | |
73455092 AV |
71 | #ifdef CONFIG_SYSCTL |
72 | struct ctl_table_set sysctls; | |
73 | #endif | |
95bdfccb | 74 | |
8e602ce2 ED |
75 | struct sock *rtnl; /* rtnetlink socket */ |
76 | struct sock *genl_sock; | |
2774c7ab | 77 | |
881d966b EB |
78 | struct list_head dev_base_head; |
79 | struct hlist_head *dev_name_head; | |
80 | struct hlist_head *dev_index_head; | |
4e985ada | 81 | unsigned int dev_base_seq; /* protected by rtnl_mutex */ |
aa79e66e | 82 | int ifindex; |
50624c93 | 83 | unsigned int dev_unreg_count; |
97c53cac | 84 | |
5fd30ee7 DL |
85 | /* core fib_rules */ |
86 | struct list_head rules_ops; | |
5fd30ee7 | 87 | |
d12d01d6 | 88 | |
8e602ce2 | 89 | struct net_device *loopback_dev; /* The loopback */ |
8efa6e93 | 90 | struct netns_core core; |
852566f5 | 91 | struct netns_mib mib; |
2aaef4e4 | 92 | struct netns_packet packet; |
a0a53c8b | 93 | struct netns_unix unx; |
8afd351c | 94 | struct netns_ipv4 ipv4; |
dfd56b8b | 95 | #if IS_ENABLED(CONFIG_IPV6) |
b0f159db DL |
96 | struct netns_ipv6 ipv6; |
97 | #endif | |
633fc86f AA |
98 | #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) |
99 | struct netns_ieee802154_lowpan ieee802154_lowpan; | |
100 | #endif | |
4db67e80 EB |
101 | #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE) |
102 | struct netns_sctp sctp; | |
103 | #endif | |
67019cc9 PE |
104 | #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) |
105 | struct netns_dccp dccp; | |
106 | #endif | |
8d870052 | 107 | #ifdef CONFIG_NETFILTER |
f3c1a44a | 108 | struct netns_nf nf; |
8d870052 | 109 | struct netns_xt xt; |
dfdb8d79 AD |
110 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
111 | struct netns_ct ct; | |
c038a767 | 112 | #endif |
99633ab2 PNA |
113 | #if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE) |
114 | struct netns_nftables nft; | |
115 | #endif | |
c038a767 AW |
116 | #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) |
117 | struct netns_nf_frag nf_frag; | |
dfdb8d79 | 118 | #endif |
cd8c20b6 AD |
119 | struct sock *nfnl; |
120 | struct sock *nfnl_stash; | |
d62ddc21 | 121 | #endif |
3d23e349 | 122 | #ifdef CONFIG_WEXT_CORE |
b333b3d2 | 123 | struct sk_buff_head wext_nlevents; |
8d870052 | 124 | #endif |
1c87733d | 125 | struct net_generic __rcu *gen; |
8e602ce2 ED |
126 | |
127 | /* Note : following structs are cache line aligned */ | |
128 | #ifdef CONFIG_XFRM | |
129 | struct netns_xfrm xfrm; | |
130 | #endif | |
8b4d14d8 | 131 | #if IS_ENABLED(CONFIG_IP_VS) |
61b1ab45 | 132 | struct netns_ipvs *ipvs; |
0189197f EB |
133 | #endif |
134 | #if IS_ENABLED(CONFIG_MPLS) | |
135 | struct netns_mpls mpls; | |
8b4d14d8 | 136 | #endif |
51d7cccf | 137 | struct sock *diag_nlsk; |
5aad1de5 | 138 | atomic_t fnhe_genid; |
5f256bec EB |
139 | }; |
140 | ||
c0f39322 DL |
141 | #include <linux/seq_file_net.h> |
142 | ||
4fabcd71 | 143 | /* Init's network namespace */ |
5f256bec | 144 | extern struct net init_net; |
a4aa834a | 145 | |
d727abcb | 146 | #ifdef CONFIG_NET_NS |
e67e16ea JP |
147 | struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns, |
148 | struct net *old_net); | |
225c0a01 | 149 | |
d727abcb EB |
150 | #else /* CONFIG_NET_NS */ |
151 | #include <linux/sched.h> | |
152 | #include <linux/nsproxy.h> | |
038e7332 EB |
153 | static inline struct net *copy_net_ns(unsigned long flags, |
154 | struct user_namespace *user_ns, struct net *old_net) | |
9dd776b6 | 155 | { |
d727abcb EB |
156 | if (flags & CLONE_NEWNET) |
157 | return ERR_PTR(-EINVAL); | |
158 | return old_net; | |
9dd776b6 | 159 | } |
d727abcb | 160 | #endif /* CONFIG_NET_NS */ |
225c0a01 DL |
161 | |
162 | ||
163 | extern struct list_head net_namespace_list; | |
9dd776b6 | 164 | |
e67e16ea JP |
165 | struct net *get_net_ns_by_pid(pid_t pid); |
166 | struct net *get_net_ns_by_fd(int pid); | |
30ffee84 | 167 | |
535d3ae9 RK |
168 | #ifdef CONFIG_SYSCTL |
169 | void ipx_register_sysctl(void); | |
170 | void ipx_unregister_sysctl(void); | |
171 | #else | |
172 | #define ipx_register_sysctl() | |
173 | #define ipx_unregister_sysctl() | |
174 | #endif | |
175 | ||
d4655795 | 176 | #ifdef CONFIG_NET_NS |
e67e16ea | 177 | void __put_net(struct net *net); |
5f256bec EB |
178 | |
179 | static inline struct net *get_net(struct net *net) | |
180 | { | |
181 | atomic_inc(&net->count); | |
182 | return net; | |
183 | } | |
184 | ||
077130c0 EB |
185 | static inline struct net *maybe_get_net(struct net *net) |
186 | { | |
187 | /* Used when we know struct net exists but we | |
188 | * aren't guaranteed a previous reference count | |
189 | * exists. If the reference count is zero this | |
190 | * function fails and returns NULL. | |
191 | */ | |
192 | if (!atomic_inc_not_zero(&net->count)) | |
193 | net = NULL; | |
194 | return net; | |
195 | } | |
196 | ||
5f256bec EB |
197 | static inline void put_net(struct net *net) |
198 | { | |
199 | if (atomic_dec_and_test(&net->count)) | |
200 | __put_net(net); | |
201 | } | |
202 | ||
878628fb YH |
203 | static inline |
204 | int net_eq(const struct net *net1, const struct net *net2) | |
205 | { | |
206 | return net1 == net2; | |
207 | } | |
a685e089 | 208 | |
e67e16ea | 209 | void net_drop_ns(void *); |
a685e089 | 210 | |
d4655795 | 211 | #else |
b9f75f45 | 212 | |
d4655795 PE |
213 | static inline struct net *get_net(struct net *net) |
214 | { | |
215 | return net; | |
216 | } | |
217 | ||
218 | static inline void put_net(struct net *net) | |
219 | { | |
220 | } | |
221 | ||
5d1e4468 DL |
222 | static inline struct net *maybe_get_net(struct net *net) |
223 | { | |
224 | return net; | |
225 | } | |
226 | ||
227 | static inline | |
228 | int net_eq(const struct net *net1, const struct net *net2) | |
229 | { | |
230 | return 1; | |
231 | } | |
a685e089 AV |
232 | |
233 | #define net_drop_ns NULL | |
5d1e4468 DL |
234 | #endif |
235 | ||
236 | ||
0c5c9fb5 | 237 | typedef struct { |
8f424b5f | 238 | #ifdef CONFIG_NET_NS |
0c5c9fb5 EB |
239 | struct net *net; |
240 | #endif | |
241 | } possible_net_t; | |
8f424b5f | 242 | |
0c5c9fb5 | 243 | static inline void write_pnet(possible_net_t *pnet, struct net *net) |
8f424b5f | 244 | { |
0c5c9fb5 EB |
245 | #ifdef CONFIG_NET_NS |
246 | pnet->net = net; | |
247 | #endif | |
8f424b5f ED |
248 | } |
249 | ||
0c5c9fb5 | 250 | static inline struct net *read_pnet(const possible_net_t *pnet) |
8f424b5f | 251 | { |
0c5c9fb5 EB |
252 | #ifdef CONFIG_NET_NS |
253 | return pnet->net; | |
8f424b5f | 254 | #else |
0c5c9fb5 | 255 | return &init_net; |
8f424b5f | 256 | #endif |
0c5c9fb5 | 257 | } |
5d1e4468 | 258 | |
5f256bec EB |
259 | #define for_each_net(VAR) \ |
260 | list_for_each_entry(VAR, &net_namespace_list, list) | |
261 | ||
11a28d37 JB |
262 | #define for_each_net_rcu(VAR) \ |
263 | list_for_each_entry_rcu(VAR, &net_namespace_list, list) | |
264 | ||
4665079c PE |
265 | #ifdef CONFIG_NET_NS |
266 | #define __net_init | |
267 | #define __net_exit | |
022cbae6 | 268 | #define __net_initdata |
04a6f82c | 269 | #define __net_initconst |
4665079c PE |
270 | #else |
271 | #define __net_init __init | |
272 | #define __net_exit __exit_refok | |
022cbae6 | 273 | #define __net_initdata __initdata |
04a6f82c | 274 | #define __net_initconst __initconst |
4665079c | 275 | #endif |
5f256bec | 276 | |
7a0877d4 | 277 | int peernet2id_alloc(struct net *net, struct net *peer); |
59324cf3 ND |
278 | int peernet2id(struct net *net, struct net *peer); |
279 | bool peernet_has_id(struct net *net, struct net *peer); | |
0c7aecd4 ND |
280 | struct net *get_net_ns_by_id(struct net *net, int id); |
281 | ||
5f256bec EB |
282 | struct pernet_operations { |
283 | struct list_head list; | |
284 | int (*init)(struct net *net); | |
285 | void (*exit)(struct net *net); | |
72ad937a | 286 | void (*exit_batch)(struct list_head *net_exit_list); |
f875bae0 EB |
287 | int *id; |
288 | size_t size; | |
5f256bec EB |
289 | }; |
290 | ||
17edde52 EB |
291 | /* |
292 | * Use these carefully. If you implement a network device and it | |
293 | * needs per network namespace operations use device pernet operations, | |
294 | * otherwise use pernet subsys operations. | |
295 | * | |
4edf547b JB |
296 | * Network interfaces need to be removed from a dying netns _before_ |
297 | * subsys notifiers can be called, as most of the network code cleanup | |
298 | * (which is done from subsys notifiers) runs with the assumption that | |
299 | * dev_remove_pack has been called so no new packets will arrive during | |
300 | * and after the cleanup functions have been called. dev_remove_pack | |
301 | * is not per namespace so instead the guarantee of no more packets | |
302 | * arriving in a network namespace is provided by ensuring that all | |
303 | * network devices and all sockets have left the network namespace | |
304 | * before the cleanup methods are called. | |
17edde52 EB |
305 | * |
306 | * For the longest time the ipv4 icmp code was registered as a pernet | |
307 | * device which caused kernel oops, and panics during network | |
308 | * namespace cleanup. So please don't get this wrong. | |
309 | */ | |
e67e16ea JP |
310 | int register_pernet_subsys(struct pernet_operations *); |
311 | void unregister_pernet_subsys(struct pernet_operations *); | |
312 | int register_pernet_device(struct pernet_operations *); | |
313 | void unregister_pernet_device(struct pernet_operations *); | |
f875bae0 | 314 | |
95bdfccb EB |
315 | struct ctl_table; |
316 | struct ctl_table_header; | |
d62c612e | 317 | |
2ca794e5 | 318 | #ifdef CONFIG_SYSCTL |
e67e16ea JP |
319 | int net_sysctl_init(void); |
320 | struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, | |
321 | struct ctl_table *table); | |
322 | void unregister_net_sysctl_table(struct ctl_table_header *header); | |
48c74958 EB |
323 | #else |
324 | static inline int net_sysctl_init(void) { return 0; } | |
325 | static inline struct ctl_table_header *register_net_sysctl(struct net *net, | |
326 | const char *path, struct ctl_table *table) | |
327 | { | |
328 | return NULL; | |
329 | } | |
330 | static inline void unregister_net_sysctl_table(struct ctl_table_header *header) | |
331 | { | |
332 | } | |
333 | #endif | |
334 | ||
ca4c3fc2 | 335 | static inline int rt_genid_ipv4(struct net *net) |
b42664f8 | 336 | { |
ca4c3fc2 | 337 | return atomic_read(&net->ipv4.rt_genid); |
b42664f8 ND |
338 | } |
339 | ||
ca4c3fc2 | 340 | static inline void rt_genid_bump_ipv4(struct net *net) |
b42664f8 | 341 | { |
ca4c3fc2 | 342 | atomic_inc(&net->ipv4.rt_genid); |
343 | } | |
344 | ||
705f1c86 | 345 | extern void (*__fib6_flush_trees)(struct net *net); |
ca4c3fc2 | 346 | static inline void rt_genid_bump_ipv6(struct net *net) |
347 | { | |
705f1c86 HFS |
348 | if (__fib6_flush_trees) |
349 | __fib6_flush_trees(net); | |
ca4c3fc2 | 350 | } |
ca4c3fc2 | 351 | |
599018a7 LR |
352 | #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) |
353 | static inline struct netns_ieee802154_lowpan * | |
354 | net_ieee802154_lowpan(struct net *net) | |
355 | { | |
356 | return &net->ieee802154_lowpan; | |
357 | } | |
599018a7 LR |
358 | #endif |
359 | ||
ca4c3fc2 | 360 | /* For callers who don't really care about whether it's IPv4 or IPv6 */ |
361 | static inline void rt_genid_bump_all(struct net *net) | |
362 | { | |
363 | rt_genid_bump_ipv4(net); | |
364 | rt_genid_bump_ipv6(net); | |
b42664f8 | 365 | } |
95bdfccb | 366 | |
5aad1de5 TT |
367 | static inline int fnhe_genid(struct net *net) |
368 | { | |
369 | return atomic_read(&net->fnhe_genid); | |
370 | } | |
371 | ||
372 | static inline void fnhe_genid_bump(struct net *net) | |
373 | { | |
374 | atomic_inc(&net->fnhe_genid); | |
375 | } | |
376 | ||
5f256bec | 377 | #endif /* __NET_NET_NAMESPACE_H */ |