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> |
c122e14d | 8 | #include <linux/refcount.h> |
5f256bec EB |
9 | #include <linux/workqueue.h> |
10 | #include <linux/list.h> | |
bee95250 | 11 | #include <linux/sysctl.h> |
5f256bec | 12 | |
6a662719 | 13 | #include <net/flow.h> |
8efa6e93 | 14 | #include <net/netns/core.h> |
852566f5 | 15 | #include <net/netns/mib.h> |
a0a53c8b | 16 | #include <net/netns/unix.h> |
2aaef4e4 | 17 | #include <net/netns/packet.h> |
8afd351c | 18 | #include <net/netns/ipv4.h> |
b0f159db | 19 | #include <net/netns/ipv6.h> |
633fc86f | 20 | #include <net/netns/ieee802154_6lowpan.h> |
4db67e80 | 21 | #include <net/netns/sctp.h> |
67019cc9 | 22 | #include <net/netns/dccp.h> |
f3c1a44a | 23 | #include <net/netns/netfilter.h> |
8d870052 | 24 | #include <net/netns/x_tables.h> |
dfdb8d79 AD |
25 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
26 | #include <net/netns/conntrack.h> | |
27 | #endif | |
99633ab2 | 28 | #include <net/netns/nftables.h> |
d62ddc21 | 29 | #include <net/netns/xfrm.h> |
0189197f | 30 | #include <net/netns/mpls.h> |
8e8cda6d | 31 | #include <net/netns/can.h> |
435d5f4b | 32 | #include <linux/ns_common.h> |
04c52dec PNA |
33 | #include <linux/idr.h> |
34 | #include <linux/skbuff.h> | |
a0a53c8b | 35 | |
038e7332 | 36 | struct user_namespace; |
457c4cbc | 37 | struct proc_dir_entry; |
2774c7ab | 38 | struct net_device; |
97c53cac | 39 | struct sock; |
1597fbc0 | 40 | struct ctl_table_header; |
dec827d1 | 41 | struct net_generic; |
134e6375 | 42 | struct sock; |
2553d064 | 43 | struct netns_ipvs; |
1597fbc0 | 44 | |
7c28bd0b ED |
45 | |
46 | #define NETDEV_HASHBITS 8 | |
47 | #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS) | |
48 | ||
5f256bec | 49 | struct net { |
c122e14d | 50 | refcount_t passive; /* To decided when the network |
a685e089 AV |
51 | * namespace should be freed. |
52 | */ | |
5f256bec | 53 | atomic_t count; /* To decided when the network |
a685e089 | 54 | * namespace should be shut down. |
5f256bec | 55 | */ |
8e602ce2 ED |
56 | spinlock_t rules_mod_lock; |
57 | ||
33cf7c90 ED |
58 | atomic64_t cookie_gen; |
59 | ||
5f256bec | 60 | struct list_head list; /* list of network namespaces */ |
2b035b39 | 61 | struct list_head cleanup_list; /* namespaces on death row */ |
72ad937a | 62 | struct list_head exit_list; /* Use only net_mutex */ |
457c4cbc | 63 | |
038e7332 | 64 | struct user_namespace *user_ns; /* Owning user namespace */ |
70328660 | 65 | struct ucounts *ucounts; |
de133464 | 66 | spinlock_t nsid_lock; |
0c7aecd4 | 67 | struct idr netns_ids; |
038e7332 | 68 | |
435d5f4b | 69 | struct ns_common ns; |
98f842e6 | 70 | |
457c4cbc EB |
71 | struct proc_dir_entry *proc_net; |
72 | struct proc_dir_entry *proc_net_stat; | |
881d966b | 73 | |
73455092 AV |
74 | #ifdef CONFIG_SYSCTL |
75 | struct ctl_table_set sysctls; | |
76 | #endif | |
95bdfccb | 77 | |
8e602ce2 ED |
78 | struct sock *rtnl; /* rtnetlink socket */ |
79 | struct sock *genl_sock; | |
2774c7ab | 80 | |
881d966b EB |
81 | struct list_head dev_base_head; |
82 | struct hlist_head *dev_name_head; | |
83 | struct hlist_head *dev_index_head; | |
4e985ada | 84 | unsigned int dev_base_seq; /* protected by rtnl_mutex */ |
aa79e66e | 85 | int ifindex; |
50624c93 | 86 | unsigned int dev_unreg_count; |
97c53cac | 87 | |
5fd30ee7 DL |
88 | /* core fib_rules */ |
89 | struct list_head rules_ops; | |
5fd30ee7 | 90 | |
04b1d4e5 | 91 | struct list_head fib_notifier_ops; /* protected by net_mutex */ |
d12d01d6 | 92 | |
8e602ce2 | 93 | struct net_device *loopback_dev; /* The loopback */ |
8efa6e93 | 94 | struct netns_core core; |
852566f5 | 95 | struct netns_mib mib; |
2aaef4e4 | 96 | struct netns_packet packet; |
a0a53c8b | 97 | struct netns_unix unx; |
8afd351c | 98 | struct netns_ipv4 ipv4; |
dfd56b8b | 99 | #if IS_ENABLED(CONFIG_IPV6) |
b0f159db DL |
100 | struct netns_ipv6 ipv6; |
101 | #endif | |
633fc86f AA |
102 | #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) |
103 | struct netns_ieee802154_lowpan ieee802154_lowpan; | |
104 | #endif | |
4db67e80 EB |
105 | #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE) |
106 | struct netns_sctp sctp; | |
107 | #endif | |
67019cc9 PE |
108 | #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) |
109 | struct netns_dccp dccp; | |
110 | #endif | |
8d870052 | 111 | #ifdef CONFIG_NETFILTER |
f3c1a44a | 112 | struct netns_nf nf; |
8d870052 | 113 | struct netns_xt xt; |
dfdb8d79 AD |
114 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
115 | struct netns_ct ct; | |
c038a767 | 116 | #endif |
99633ab2 PNA |
117 | #if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE) |
118 | struct netns_nftables nft; | |
119 | #endif | |
c038a767 AW |
120 | #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) |
121 | struct netns_nf_frag nf_frag; | |
dfdb8d79 | 122 | #endif |
cd8c20b6 AD |
123 | struct sock *nfnl; |
124 | struct sock *nfnl_stash; | |
3499abb2 AS |
125 | #if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT) |
126 | struct list_head nfnl_acct_list; | |
127 | #endif | |
19576c94 PN |
128 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
129 | struct list_head nfct_timeout_list; | |
130 | #endif | |
d62ddc21 | 131 | #endif |
3d23e349 | 132 | #ifdef CONFIG_WEXT_CORE |
b333b3d2 | 133 | struct sk_buff_head wext_nlevents; |
8d870052 | 134 | #endif |
1c87733d | 135 | struct net_generic __rcu *gen; |
8e602ce2 ED |
136 | |
137 | /* Note : following structs are cache line aligned */ | |
138 | #ifdef CONFIG_XFRM | |
139 | struct netns_xfrm xfrm; | |
140 | #endif | |
8b4d14d8 | 141 | #if IS_ENABLED(CONFIG_IP_VS) |
61b1ab45 | 142 | struct netns_ipvs *ipvs; |
0189197f EB |
143 | #endif |
144 | #if IS_ENABLED(CONFIG_MPLS) | |
145 | struct netns_mpls mpls; | |
8e8cda6d MK |
146 | #endif |
147 | #if IS_ENABLED(CONFIG_CAN) | |
148 | struct netns_can can; | |
8b4d14d8 | 149 | #endif |
51d7cccf | 150 | struct sock *diag_nlsk; |
5aad1de5 | 151 | atomic_t fnhe_genid; |
3859a271 | 152 | } __randomize_layout; |
5f256bec | 153 | |
c0f39322 DL |
154 | #include <linux/seq_file_net.h> |
155 | ||
4fabcd71 | 156 | /* Init's network namespace */ |
5f256bec | 157 | extern struct net init_net; |
a4aa834a | 158 | |
d727abcb | 159 | #ifdef CONFIG_NET_NS |
e67e16ea JP |
160 | struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns, |
161 | struct net *old_net); | |
225c0a01 | 162 | |
7866cc57 | 163 | void net_ns_barrier(void); |
d727abcb EB |
164 | #else /* CONFIG_NET_NS */ |
165 | #include <linux/sched.h> | |
166 | #include <linux/nsproxy.h> | |
038e7332 EB |
167 | static inline struct net *copy_net_ns(unsigned long flags, |
168 | struct user_namespace *user_ns, struct net *old_net) | |
9dd776b6 | 169 | { |
d727abcb EB |
170 | if (flags & CLONE_NEWNET) |
171 | return ERR_PTR(-EINVAL); | |
172 | return old_net; | |
9dd776b6 | 173 | } |
7866cc57 FW |
174 | |
175 | static inline void net_ns_barrier(void) {} | |
d727abcb | 176 | #endif /* CONFIG_NET_NS */ |
225c0a01 DL |
177 | |
178 | ||
179 | extern struct list_head net_namespace_list; | |
9dd776b6 | 180 | |
e67e16ea | 181 | struct net *get_net_ns_by_pid(pid_t pid); |
0f5258cd | 182 | struct net *get_net_ns_by_fd(int fd); |
30ffee84 | 183 | |
535d3ae9 RK |
184 | #ifdef CONFIG_SYSCTL |
185 | void ipx_register_sysctl(void); | |
186 | void ipx_unregister_sysctl(void); | |
187 | #else | |
188 | #define ipx_register_sysctl() | |
189 | #define ipx_unregister_sysctl() | |
190 | #endif | |
191 | ||
d4655795 | 192 | #ifdef CONFIG_NET_NS |
e67e16ea | 193 | void __put_net(struct net *net); |
5f256bec EB |
194 | |
195 | static inline struct net *get_net(struct net *net) | |
196 | { | |
197 | atomic_inc(&net->count); | |
198 | return net; | |
199 | } | |
200 | ||
077130c0 EB |
201 | static inline struct net *maybe_get_net(struct net *net) |
202 | { | |
203 | /* Used when we know struct net exists but we | |
204 | * aren't guaranteed a previous reference count | |
205 | * exists. If the reference count is zero this | |
206 | * function fails and returns NULL. | |
207 | */ | |
208 | if (!atomic_inc_not_zero(&net->count)) | |
209 | net = NULL; | |
210 | return net; | |
211 | } | |
212 | ||
5f256bec EB |
213 | static inline void put_net(struct net *net) |
214 | { | |
215 | if (atomic_dec_and_test(&net->count)) | |
216 | __put_net(net); | |
217 | } | |
218 | ||
878628fb YH |
219 | static inline |
220 | int net_eq(const struct net *net1, const struct net *net2) | |
221 | { | |
222 | return net1 == net2; | |
223 | } | |
a685e089 | 224 | |
e67e16ea | 225 | void net_drop_ns(void *); |
a685e089 | 226 | |
d4655795 | 227 | #else |
b9f75f45 | 228 | |
d4655795 PE |
229 | static inline struct net *get_net(struct net *net) |
230 | { | |
231 | return net; | |
232 | } | |
233 | ||
234 | static inline void put_net(struct net *net) | |
235 | { | |
236 | } | |
237 | ||
5d1e4468 DL |
238 | static inline struct net *maybe_get_net(struct net *net) |
239 | { | |
240 | return net; | |
241 | } | |
242 | ||
243 | static inline | |
244 | int net_eq(const struct net *net1, const struct net *net2) | |
245 | { | |
246 | return 1; | |
247 | } | |
a685e089 AV |
248 | |
249 | #define net_drop_ns NULL | |
5d1e4468 DL |
250 | #endif |
251 | ||
252 | ||
0c5c9fb5 | 253 | typedef struct { |
8f424b5f | 254 | #ifdef CONFIG_NET_NS |
0c5c9fb5 EB |
255 | struct net *net; |
256 | #endif | |
257 | } possible_net_t; | |
8f424b5f | 258 | |
0c5c9fb5 | 259 | static inline void write_pnet(possible_net_t *pnet, struct net *net) |
8f424b5f | 260 | { |
0c5c9fb5 EB |
261 | #ifdef CONFIG_NET_NS |
262 | pnet->net = net; | |
263 | #endif | |
8f424b5f ED |
264 | } |
265 | ||
0c5c9fb5 | 266 | static inline struct net *read_pnet(const possible_net_t *pnet) |
8f424b5f | 267 | { |
0c5c9fb5 EB |
268 | #ifdef CONFIG_NET_NS |
269 | return pnet->net; | |
8f424b5f | 270 | #else |
0c5c9fb5 | 271 | return &init_net; |
8f424b5f | 272 | #endif |
0c5c9fb5 | 273 | } |
5d1e4468 | 274 | |
5f256bec EB |
275 | #define for_each_net(VAR) \ |
276 | list_for_each_entry(VAR, &net_namespace_list, list) | |
277 | ||
11a28d37 JB |
278 | #define for_each_net_rcu(VAR) \ |
279 | list_for_each_entry_rcu(VAR, &net_namespace_list, list) | |
280 | ||
4665079c PE |
281 | #ifdef CONFIG_NET_NS |
282 | #define __net_init | |
283 | #define __net_exit | |
022cbae6 | 284 | #define __net_initdata |
04a6f82c | 285 | #define __net_initconst |
4665079c PE |
286 | #else |
287 | #define __net_init __init | |
bd721ea7 | 288 | #define __net_exit __ref |
022cbae6 | 289 | #define __net_initdata __initdata |
04a6f82c | 290 | #define __net_initconst __initconst |
4665079c | 291 | #endif |
5f256bec | 292 | |
7a0877d4 | 293 | int peernet2id_alloc(struct net *net, struct net *peer); |
59324cf3 ND |
294 | int peernet2id(struct net *net, struct net *peer); |
295 | bool peernet_has_id(struct net *net, struct net *peer); | |
0c7aecd4 ND |
296 | struct net *get_net_ns_by_id(struct net *net, int id); |
297 | ||
5f256bec EB |
298 | struct pernet_operations { |
299 | struct list_head list; | |
300 | int (*init)(struct net *net); | |
301 | void (*exit)(struct net *net); | |
72ad937a | 302 | void (*exit_batch)(struct list_head *net_exit_list); |
c7d03a00 | 303 | unsigned int *id; |
f875bae0 | 304 | size_t size; |
5f256bec EB |
305 | }; |
306 | ||
17edde52 EB |
307 | /* |
308 | * Use these carefully. If you implement a network device and it | |
309 | * needs per network namespace operations use device pernet operations, | |
310 | * otherwise use pernet subsys operations. | |
311 | * | |
4edf547b JB |
312 | * Network interfaces need to be removed from a dying netns _before_ |
313 | * subsys notifiers can be called, as most of the network code cleanup | |
314 | * (which is done from subsys notifiers) runs with the assumption that | |
315 | * dev_remove_pack has been called so no new packets will arrive during | |
316 | * and after the cleanup functions have been called. dev_remove_pack | |
317 | * is not per namespace so instead the guarantee of no more packets | |
318 | * arriving in a network namespace is provided by ensuring that all | |
319 | * network devices and all sockets have left the network namespace | |
320 | * before the cleanup methods are called. | |
17edde52 EB |
321 | * |
322 | * For the longest time the ipv4 icmp code was registered as a pernet | |
323 | * device which caused kernel oops, and panics during network | |
324 | * namespace cleanup. So please don't get this wrong. | |
325 | */ | |
e67e16ea JP |
326 | int register_pernet_subsys(struct pernet_operations *); |
327 | void unregister_pernet_subsys(struct pernet_operations *); | |
328 | int register_pernet_device(struct pernet_operations *); | |
329 | void unregister_pernet_device(struct pernet_operations *); | |
f875bae0 | 330 | |
95bdfccb EB |
331 | struct ctl_table; |
332 | struct ctl_table_header; | |
d62c612e | 333 | |
2ca794e5 | 334 | #ifdef CONFIG_SYSCTL |
e67e16ea JP |
335 | int net_sysctl_init(void); |
336 | struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, | |
337 | struct ctl_table *table); | |
338 | void unregister_net_sysctl_table(struct ctl_table_header *header); | |
48c74958 EB |
339 | #else |
340 | static inline int net_sysctl_init(void) { return 0; } | |
341 | static inline struct ctl_table_header *register_net_sysctl(struct net *net, | |
342 | const char *path, struct ctl_table *table) | |
343 | { | |
344 | return NULL; | |
345 | } | |
346 | static inline void unregister_net_sysctl_table(struct ctl_table_header *header) | |
347 | { | |
348 | } | |
349 | #endif | |
350 | ||
ca4c3fc2 | 351 | static inline int rt_genid_ipv4(struct net *net) |
b42664f8 | 352 | { |
ca4c3fc2 | 353 | return atomic_read(&net->ipv4.rt_genid); |
b42664f8 ND |
354 | } |
355 | ||
ca4c3fc2 | 356 | static inline void rt_genid_bump_ipv4(struct net *net) |
b42664f8 | 357 | { |
ca4c3fc2 | 358 | atomic_inc(&net->ipv4.rt_genid); |
359 | } | |
360 | ||
705f1c86 | 361 | extern void (*__fib6_flush_trees)(struct net *net); |
ca4c3fc2 | 362 | static inline void rt_genid_bump_ipv6(struct net *net) |
363 | { | |
705f1c86 HFS |
364 | if (__fib6_flush_trees) |
365 | __fib6_flush_trees(net); | |
ca4c3fc2 | 366 | } |
ca4c3fc2 | 367 | |
599018a7 LR |
368 | #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) |
369 | static inline struct netns_ieee802154_lowpan * | |
370 | net_ieee802154_lowpan(struct net *net) | |
371 | { | |
372 | return &net->ieee802154_lowpan; | |
373 | } | |
599018a7 LR |
374 | #endif |
375 | ||
ca4c3fc2 | 376 | /* For callers who don't really care about whether it's IPv4 or IPv6 */ |
377 | static inline void rt_genid_bump_all(struct net *net) | |
378 | { | |
379 | rt_genid_bump_ipv4(net); | |
380 | rt_genid_bump_ipv6(net); | |
b42664f8 | 381 | } |
95bdfccb | 382 | |
5aad1de5 TT |
383 | static inline int fnhe_genid(struct net *net) |
384 | { | |
385 | return atomic_read(&net->fnhe_genid); | |
386 | } | |
387 | ||
388 | static inline void fnhe_genid_bump(struct net *net) | |
389 | { | |
390 | atomic_inc(&net->fnhe_genid); | |
391 | } | |
392 | ||
5f256bec | 393 | #endif /* __NET_NET_NAMESPACE_H */ |