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> |
a0a53c8b | 31 | |
038e7332 | 32 | struct user_namespace; |
457c4cbc | 33 | struct proc_dir_entry; |
2774c7ab | 34 | struct net_device; |
97c53cac | 35 | struct sock; |
1597fbc0 | 36 | struct ctl_table_header; |
dec827d1 | 37 | struct net_generic; |
134e6375 | 38 | struct sock; |
2553d064 | 39 | struct netns_ipvs; |
1597fbc0 | 40 | |
7c28bd0b ED |
41 | |
42 | #define NETDEV_HASHBITS 8 | |
43 | #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS) | |
44 | ||
5f256bec | 45 | struct net { |
a685e089 AV |
46 | atomic_t passive; /* To decided when the network |
47 | * namespace should be freed. | |
48 | */ | |
5f256bec | 49 | atomic_t count; /* To decided when the network |
a685e089 | 50 | * namespace should be shut down. |
5f256bec | 51 | */ |
5d1e4468 | 52 | #ifdef NETNS_REFCNT_DEBUG |
5f256bec EB |
53 | atomic_t use_count; /* To track references we |
54 | * destroy on demand | |
55 | */ | |
5d1e4468 | 56 | #endif |
8e602ce2 ED |
57 | spinlock_t rules_mod_lock; |
58 | ||
5f256bec | 59 | struct list_head list; /* list of network namespaces */ |
2b035b39 | 60 | struct list_head cleanup_list; /* namespaces on death row */ |
72ad937a | 61 | struct list_head exit_list; /* Use only net_mutex */ |
457c4cbc | 62 | |
038e7332 | 63 | struct user_namespace *user_ns; /* Owning user namespace */ |
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 | ||
237 | #ifdef NETNS_REFCNT_DEBUG | |
d4655795 PE |
238 | static inline struct net *hold_net(struct net *net) |
239 | { | |
5d1e4468 DL |
240 | if (net) |
241 | atomic_inc(&net->use_count); | |
d4655795 PE |
242 | return net; |
243 | } | |
244 | ||
245 | static inline void release_net(struct net *net) | |
246 | { | |
5d1e4468 DL |
247 | if (net) |
248 | atomic_dec(&net->use_count); | |
d4655795 | 249 | } |
5d1e4468 DL |
250 | #else |
251 | static inline struct net *hold_net(struct net *net) | |
d4655795 PE |
252 | { |
253 | return net; | |
254 | } | |
878628fb | 255 | |
5d1e4468 | 256 | static inline void release_net(struct net *net) |
878628fb | 257 | { |
878628fb | 258 | } |
d4655795 | 259 | #endif |
5f256bec | 260 | |
8f424b5f ED |
261 | #ifdef CONFIG_NET_NS |
262 | ||
263 | static inline void write_pnet(struct net **pnet, struct net *net) | |
264 | { | |
265 | *pnet = net; | |
266 | } | |
267 | ||
268 | static inline struct net *read_pnet(struct net * const *pnet) | |
269 | { | |
270 | return *pnet; | |
271 | } | |
272 | ||
273 | #else | |
274 | ||
275 | #define write_pnet(pnet, net) do { (void)(net);} while (0) | |
276 | #define read_pnet(pnet) (&init_net) | |
277 | ||
278 | #endif | |
5d1e4468 | 279 | |
5f256bec EB |
280 | #define for_each_net(VAR) \ |
281 | list_for_each_entry(VAR, &net_namespace_list, list) | |
282 | ||
11a28d37 JB |
283 | #define for_each_net_rcu(VAR) \ |
284 | list_for_each_entry_rcu(VAR, &net_namespace_list, list) | |
285 | ||
4665079c PE |
286 | #ifdef CONFIG_NET_NS |
287 | #define __net_init | |
288 | #define __net_exit | |
022cbae6 | 289 | #define __net_initdata |
04a6f82c | 290 | #define __net_initconst |
4665079c PE |
291 | #else |
292 | #define __net_init __init | |
293 | #define __net_exit __exit_refok | |
022cbae6 | 294 | #define __net_initdata __initdata |
04a6f82c | 295 | #define __net_initconst __initconst |
4665079c | 296 | #endif |
5f256bec | 297 | |
0c7aecd4 ND |
298 | int peernet2id(struct net *net, struct net *peer); |
299 | struct net *get_net_ns_by_id(struct net *net, int id); | |
300 | ||
5f256bec EB |
301 | struct pernet_operations { |
302 | struct list_head list; | |
303 | int (*init)(struct net *net); | |
304 | void (*exit)(struct net *net); | |
72ad937a | 305 | void (*exit_batch)(struct list_head *net_exit_list); |
f875bae0 EB |
306 | int *id; |
307 | size_t size; | |
5f256bec EB |
308 | }; |
309 | ||
17edde52 EB |
310 | /* |
311 | * Use these carefully. If you implement a network device and it | |
312 | * needs per network namespace operations use device pernet operations, | |
313 | * otherwise use pernet subsys operations. | |
314 | * | |
4edf547b JB |
315 | * Network interfaces need to be removed from a dying netns _before_ |
316 | * subsys notifiers can be called, as most of the network code cleanup | |
317 | * (which is done from subsys notifiers) runs with the assumption that | |
318 | * dev_remove_pack has been called so no new packets will arrive during | |
319 | * and after the cleanup functions have been called. dev_remove_pack | |
320 | * is not per namespace so instead the guarantee of no more packets | |
321 | * arriving in a network namespace is provided by ensuring that all | |
322 | * network devices and all sockets have left the network namespace | |
323 | * before the cleanup methods are called. | |
17edde52 EB |
324 | * |
325 | * For the longest time the ipv4 icmp code was registered as a pernet | |
326 | * device which caused kernel oops, and panics during network | |
327 | * namespace cleanup. So please don't get this wrong. | |
328 | */ | |
e67e16ea JP |
329 | int register_pernet_subsys(struct pernet_operations *); |
330 | void unregister_pernet_subsys(struct pernet_operations *); | |
331 | int register_pernet_device(struct pernet_operations *); | |
332 | void unregister_pernet_device(struct pernet_operations *); | |
f875bae0 | 333 | |
95bdfccb EB |
334 | struct ctl_table; |
335 | struct ctl_table_header; | |
d62c612e | 336 | |
2ca794e5 | 337 | #ifdef CONFIG_SYSCTL |
e67e16ea JP |
338 | int net_sysctl_init(void); |
339 | struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, | |
340 | struct ctl_table *table); | |
341 | void unregister_net_sysctl_table(struct ctl_table_header *header); | |
48c74958 EB |
342 | #else |
343 | static inline int net_sysctl_init(void) { return 0; } | |
344 | static inline struct ctl_table_header *register_net_sysctl(struct net *net, | |
345 | const char *path, struct ctl_table *table) | |
346 | { | |
347 | return NULL; | |
348 | } | |
349 | static inline void unregister_net_sysctl_table(struct ctl_table_header *header) | |
350 | { | |
351 | } | |
352 | #endif | |
353 | ||
ca4c3fc2 | 354 | static inline int rt_genid_ipv4(struct net *net) |
b42664f8 | 355 | { |
ca4c3fc2 | 356 | return atomic_read(&net->ipv4.rt_genid); |
b42664f8 ND |
357 | } |
358 | ||
ca4c3fc2 | 359 | static inline void rt_genid_bump_ipv4(struct net *net) |
b42664f8 | 360 | { |
ca4c3fc2 | 361 | atomic_inc(&net->ipv4.rt_genid); |
362 | } | |
363 | ||
705f1c86 | 364 | extern void (*__fib6_flush_trees)(struct net *net); |
ca4c3fc2 | 365 | static inline void rt_genid_bump_ipv6(struct net *net) |
366 | { | |
705f1c86 HFS |
367 | if (__fib6_flush_trees) |
368 | __fib6_flush_trees(net); | |
ca4c3fc2 | 369 | } |
ca4c3fc2 | 370 | |
599018a7 LR |
371 | #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) |
372 | static inline struct netns_ieee802154_lowpan * | |
373 | net_ieee802154_lowpan(struct net *net) | |
374 | { | |
375 | return &net->ieee802154_lowpan; | |
376 | } | |
599018a7 LR |
377 | #endif |
378 | ||
ca4c3fc2 | 379 | /* For callers who don't really care about whether it's IPv4 or IPv6 */ |
380 | static inline void rt_genid_bump_all(struct net *net) | |
381 | { | |
382 | rt_genid_bump_ipv4(net); | |
383 | rt_genid_bump_ipv6(net); | |
b42664f8 | 384 | } |
95bdfccb | 385 | |
5aad1de5 TT |
386 | static inline int fnhe_genid(struct net *net) |
387 | { | |
388 | return atomic_read(&net->fnhe_genid); | |
389 | } | |
390 | ||
391 | static inline void fnhe_genid_bump(struct net *net) | |
392 | { | |
393 | atomic_inc(&net->fnhe_genid); | |
394 | } | |
395 | ||
5f256bec | 396 | #endif /* __NET_NET_NAMESPACE_H */ |