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5#ifndef __NET_NET_NAMESPACE_H
6#define __NET_NET_NAMESPACE_H
7
8#include <linux/atomic.h>
9#include <linux/refcount.h>
10#include <linux/workqueue.h>
11#include <linux/list.h>
12#include <linux/sysctl.h>
13#include <linux/uidgid.h>
14
15#include <net/flow.h>
16#include <net/netns/core.h>
17#include <net/netns/mib.h>
18#include <net/netns/unix.h>
19#include <net/netns/packet.h>
20#include <net/netns/ipv4.h>
21#include <net/netns/ipv6.h>
22#include <net/netns/nexthop.h>
23#include <net/netns/ieee802154_6lowpan.h>
24#include <net/netns/sctp.h>
25#include <net/netns/dccp.h>
26#include <net/netns/netfilter.h>
27#include <net/netns/x_tables.h>
28#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
29#include <net/netns/conntrack.h>
30#endif
31#include <net/netns/nftables.h>
32#include <net/netns/xfrm.h>
33#include <net/netns/mpls.h>
34#include <net/netns/can.h>
35#include <net/netns/xdp.h>
36#include <net/netns/bpf.h>
37#include <linux/ns_common.h>
38#include <linux/idr.h>
39#include <linux/skbuff.h>
40#include <linux/notifier.h>
41
42struct user_namespace;
43struct proc_dir_entry;
44struct net_device;
45struct sock;
46struct ctl_table_header;
47struct net_generic;
48struct uevent_sock;
49struct netns_ipvs;
50struct bpf_prog;
51
52
53#define NETDEV_HASHBITS 8
54#define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
55
56struct net {
57
58
59
60 refcount_t passive;
61
62
63 refcount_t count;
64
65
66 spinlock_t rules_mod_lock;
67
68 unsigned int dev_unreg_count;
69
70 unsigned int dev_base_seq;
71 int ifindex;
72
73 spinlock_t nsid_lock;
74 atomic_t fnhe_genid;
75
76 struct list_head list;
77 struct list_head exit_list;
78
79
80
81
82
83 struct llist_node cleanup_list;
84
85#ifdef CONFIG_KEYS
86 struct key_tag *key_domain;
87#endif
88 struct user_namespace *user_ns;
89 struct ucounts *ucounts;
90 struct idr netns_ids;
91
92 struct ns_common ns;
93
94 struct list_head dev_base_head;
95 struct proc_dir_entry *proc_net;
96 struct proc_dir_entry *proc_net_stat;
97
98#ifdef CONFIG_SYSCTL
99 struct ctl_table_set sysctls;
100#endif
101
102 struct sock *rtnl;
103 struct sock *genl_sock;
104
105 struct uevent_sock *uevent_sock;
106
107 struct hlist_head *dev_name_head;
108 struct hlist_head *dev_index_head;
109 struct raw_notifier_head netdev_chain;
110
111
112
113
114 u32 hash_mix;
115
116 struct net_device *loopback_dev;
117
118
119 struct list_head rules_ops;
120
121 struct netns_core core;
122 struct netns_mib mib;
123 struct netns_packet packet;
124 struct netns_unix unx;
125 struct netns_nexthop nexthop;
126 struct netns_ipv4 ipv4;
127#if IS_ENABLED(CONFIG_IPV6)
128 struct netns_ipv6 ipv6;
129#endif
130#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
131 struct netns_ieee802154_lowpan ieee802154_lowpan;
132#endif
133#if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE)
134 struct netns_sctp sctp;
135#endif
136#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
137 struct netns_dccp dccp;
138#endif
139#ifdef CONFIG_NETFILTER
140 struct netns_nf nf;
141 struct netns_xt xt;
142#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
143 struct netns_ct ct;
144#endif
145#if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE)
146 struct netns_nftables nft;
147#endif
148#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
149 struct netns_nf_frag nf_frag;
150 struct ctl_table_header *nf_frag_frags_hdr;
151#endif
152 struct sock *nfnl;
153 struct sock *nfnl_stash;
154#if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT)
155 struct list_head nfnl_acct_list;
156#endif
157#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
158 struct list_head nfct_timeout_list;
159#endif
160#endif
161#ifdef CONFIG_WEXT_CORE
162 struct sk_buff_head wext_nlevents;
163#endif
164 struct net_generic __rcu *gen;
165
166
167 struct netns_bpf bpf;
168
169
170#ifdef CONFIG_XFRM
171 struct netns_xfrm xfrm;
172#endif
173
174 atomic64_t net_cookie;
175
176#if IS_ENABLED(CONFIG_IP_VS)
177 struct netns_ipvs *ipvs;
178#endif
179#if IS_ENABLED(CONFIG_MPLS)
180 struct netns_mpls mpls;
181#endif
182#if IS_ENABLED(CONFIG_CAN)
183 struct netns_can can;
184#endif
185#ifdef CONFIG_XDP_SOCKETS
186 struct netns_xdp xdp;
187#endif
188#if IS_ENABLED(CONFIG_CRYPTO_USER)
189 struct sock *crypto_nlsk;
190#endif
191 struct sock *diag_nlsk;
192} __randomize_layout;
193
194#include <linux/seq_file_net.h>
195
196
197extern struct net init_net;
198
199#ifdef CONFIG_NET_NS
200struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns,
201 struct net *old_net);
202
203void net_ns_get_ownership(const struct net *net, kuid_t *uid, kgid_t *gid);
204
205void net_ns_barrier(void);
206#else
207#include <linux/sched.h>
208#include <linux/nsproxy.h>
209static inline struct net *copy_net_ns(unsigned long flags,
210 struct user_namespace *user_ns, struct net *old_net)
211{
212 if (flags & CLONE_NEWNET)
213 return ERR_PTR(-EINVAL);
214 return old_net;
215}
216
217static inline void net_ns_get_ownership(const struct net *net,
218 kuid_t *uid, kgid_t *gid)
219{
220 *uid = GLOBAL_ROOT_UID;
221 *gid = GLOBAL_ROOT_GID;
222}
223
224static inline void net_ns_barrier(void) {}
225#endif
226
227
228extern struct list_head net_namespace_list;
229
230struct net *get_net_ns_by_pid(pid_t pid);
231struct net *get_net_ns_by_fd(int fd);
232
233u64 net_gen_cookie(struct net *net);
234
235#ifdef CONFIG_SYSCTL
236void ipx_register_sysctl(void);
237void ipx_unregister_sysctl(void);
238#else
239#define ipx_register_sysctl()
240#define ipx_unregister_sysctl()
241#endif
242
243#ifdef CONFIG_NET_NS
244void __put_net(struct net *net);
245
246static inline struct net *get_net(struct net *net)
247{
248 refcount_inc(&net->count);
249 return net;
250}
251
252static inline struct net *maybe_get_net(struct net *net)
253{
254
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257
258
259 if (!refcount_inc_not_zero(&net->count))
260 net = NULL;
261 return net;
262}
263
264static inline void put_net(struct net *net)
265{
266 if (refcount_dec_and_test(&net->count))
267 __put_net(net);
268}
269
270static inline
271int net_eq(const struct net *net1, const struct net *net2)
272{
273 return net1 == net2;
274}
275
276static inline int check_net(const struct net *net)
277{
278 return refcount_read(&net->count) != 0;
279}
280
281void net_drop_ns(void *);
282
283#else
284
285static inline struct net *get_net(struct net *net)
286{
287 return net;
288}
289
290static inline void put_net(struct net *net)
291{
292}
293
294static inline struct net *maybe_get_net(struct net *net)
295{
296 return net;
297}
298
299static inline
300int net_eq(const struct net *net1, const struct net *net2)
301{
302 return 1;
303}
304
305static inline int check_net(const struct net *net)
306{
307 return 1;
308}
309
310#define net_drop_ns NULL
311#endif
312
313
314typedef struct {
315#ifdef CONFIG_NET_NS
316 struct net *net;
317#endif
318} possible_net_t;
319
320static inline void write_pnet(possible_net_t *pnet, struct net *net)
321{
322#ifdef CONFIG_NET_NS
323 pnet->net = net;
324#endif
325}
326
327static inline struct net *read_pnet(const possible_net_t *pnet)
328{
329#ifdef CONFIG_NET_NS
330 return pnet->net;
331#else
332 return &init_net;
333#endif
334}
335
336
337#define for_each_net(VAR) \
338 list_for_each_entry(VAR, &net_namespace_list, list)
339#define for_each_net_continue_reverse(VAR) \
340 list_for_each_entry_continue_reverse(VAR, &net_namespace_list, list)
341#define for_each_net_rcu(VAR) \
342 list_for_each_entry_rcu(VAR, &net_namespace_list, list)
343
344#ifdef CONFIG_NET_NS
345#define __net_init
346#define __net_exit
347#define __net_initdata
348#define __net_initconst
349#else
350#define __net_init __init
351#define __net_exit __ref
352#define __net_initdata __initdata
353#define __net_initconst __initconst
354#endif
355
356int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp);
357int peernet2id(const struct net *net, struct net *peer);
358bool peernet_has_id(const struct net *net, struct net *peer);
359struct net *get_net_ns_by_id(const struct net *net, int id);
360
361struct pernet_operations {
362 struct list_head list;
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385 int (*init)(struct net *net);
386 void (*pre_exit)(struct net *net);
387 void (*exit)(struct net *net);
388 void (*exit_batch)(struct list_head *net_exit_list);
389 unsigned int *id;
390 size_t size;
391};
392
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412int register_pernet_subsys(struct pernet_operations *);
413void unregister_pernet_subsys(struct pernet_operations *);
414int register_pernet_device(struct pernet_operations *);
415void unregister_pernet_device(struct pernet_operations *);
416
417struct ctl_table;
418struct ctl_table_header;
419
420#ifdef CONFIG_SYSCTL
421int net_sysctl_init(void);
422struct ctl_table_header *register_net_sysctl(struct net *net, const char *path,
423 struct ctl_table *table);
424void unregister_net_sysctl_table(struct ctl_table_header *header);
425#else
426static inline int net_sysctl_init(void) { return 0; }
427static inline struct ctl_table_header *register_net_sysctl(struct net *net,
428 const char *path, struct ctl_table *table)
429{
430 return NULL;
431}
432static inline void unregister_net_sysctl_table(struct ctl_table_header *header)
433{
434}
435#endif
436
437static inline int rt_genid_ipv4(const struct net *net)
438{
439 return atomic_read(&net->ipv4.rt_genid);
440}
441
442#if IS_ENABLED(CONFIG_IPV6)
443static inline int rt_genid_ipv6(const struct net *net)
444{
445 return atomic_read(&net->ipv6.fib6_sernum);
446}
447#endif
448
449static inline void rt_genid_bump_ipv4(struct net *net)
450{
451 atomic_inc(&net->ipv4.rt_genid);
452}
453
454extern void (*__fib6_flush_trees)(struct net *net);
455static inline void rt_genid_bump_ipv6(struct net *net)
456{
457 if (__fib6_flush_trees)
458 __fib6_flush_trees(net);
459}
460
461#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
462static inline struct netns_ieee802154_lowpan *
463net_ieee802154_lowpan(struct net *net)
464{
465 return &net->ieee802154_lowpan;
466}
467#endif
468
469
470static inline void rt_genid_bump_all(struct net *net)
471{
472 rt_genid_bump_ipv4(net);
473 rt_genid_bump_ipv6(net);
474}
475
476static inline int fnhe_genid(const struct net *net)
477{
478 return atomic_read(&net->fnhe_genid);
479}
480
481static inline void fnhe_genid_bump(struct net *net)
482{
483 atomic_inc(&net->fnhe_genid);
484}
485
486#endif
487