base: Export platform_msi_domain_[alloc,free]_irqs
[linux/fpc-iii.git] / include / net / net_namespace.h
blob2dcea635ecce3ead337ffa5fd2ba68096db9f997
1 /*
2 * Operations on the network namespace
3 */
4 #ifndef __NET_NET_NAMESPACE_H
5 #define __NET_NET_NAMESPACE_H
7 #include <linux/atomic.h>
8 #include <linux/workqueue.h>
9 #include <linux/list.h>
10 #include <linux/sysctl.h>
12 #include <net/flow.h>
13 #include <net/netns/core.h>
14 #include <net/netns/mib.h>
15 #include <net/netns/unix.h>
16 #include <net/netns/packet.h>
17 #include <net/netns/ipv4.h>
18 #include <net/netns/ipv6.h>
19 #include <net/netns/ieee802154_6lowpan.h>
20 #include <net/netns/sctp.h>
21 #include <net/netns/dccp.h>
22 #include <net/netns/netfilter.h>
23 #include <net/netns/x_tables.h>
24 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
25 #include <net/netns/conntrack.h>
26 #endif
27 #include <net/netns/nftables.h>
28 #include <net/netns/xfrm.h>
29 #include <net/netns/mpls.h>
30 #include <linux/ns_common.h>
31 #include <linux/idr.h>
32 #include <linux/skbuff.h>
34 struct user_namespace;
35 struct proc_dir_entry;
36 struct net_device;
37 struct sock;
38 struct ctl_table_header;
39 struct net_generic;
40 struct sock;
41 struct netns_ipvs;
44 #define NETDEV_HASHBITS 8
45 #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
47 struct net {
48 atomic_t passive; /* To decided when the network
49 * namespace should be freed.
51 atomic_t count; /* To decided when the network
52 * namespace should be shut down.
54 spinlock_t rules_mod_lock;
56 atomic64_t cookie_gen;
58 struct list_head list; /* list of network namespaces */
59 struct list_head cleanup_list; /* namespaces on death row */
60 struct list_head exit_list; /* Use only net_mutex */
62 struct user_namespace *user_ns; /* Owning user namespace */
63 spinlock_t nsid_lock;
64 struct idr netns_ids;
66 struct ns_common ns;
68 struct proc_dir_entry *proc_net;
69 struct proc_dir_entry *proc_net_stat;
71 #ifdef CONFIG_SYSCTL
72 struct ctl_table_set sysctls;
73 #endif
75 struct sock *rtnl; /* rtnetlink socket */
76 struct sock *genl_sock;
78 struct list_head dev_base_head;
79 struct hlist_head *dev_name_head;
80 struct hlist_head *dev_index_head;
81 unsigned int dev_base_seq; /* protected by rtnl_mutex */
82 int ifindex;
83 unsigned int dev_unreg_count;
85 /* core fib_rules */
86 struct list_head rules_ops;
89 struct net_device *loopback_dev; /* The loopback */
90 struct netns_core core;
91 struct netns_mib mib;
92 struct netns_packet packet;
93 struct netns_unix unx;
94 struct netns_ipv4 ipv4;
95 #if IS_ENABLED(CONFIG_IPV6)
96 struct netns_ipv6 ipv6;
97 #endif
98 #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
99 struct netns_ieee802154_lowpan ieee802154_lowpan;
100 #endif
101 #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE)
102 struct netns_sctp sctp;
103 #endif
104 #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
105 struct netns_dccp dccp;
106 #endif
107 #ifdef CONFIG_NETFILTER
108 struct netns_nf nf;
109 struct netns_xt xt;
110 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
111 struct netns_ct ct;
112 #endif
113 #if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE)
114 struct netns_nftables nft;
115 #endif
116 #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
117 struct netns_nf_frag nf_frag;
118 #endif
119 struct sock *nfnl;
120 struct sock *nfnl_stash;
121 #if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT)
122 struct list_head nfnl_acct_list;
123 #endif
124 #endif
125 #ifdef CONFIG_WEXT_CORE
126 struct sk_buff_head wext_nlevents;
127 #endif
128 struct net_generic __rcu *gen;
130 /* Note : following structs are cache line aligned */
131 #ifdef CONFIG_XFRM
132 struct netns_xfrm xfrm;
133 #endif
134 #if IS_ENABLED(CONFIG_IP_VS)
135 struct netns_ipvs *ipvs;
136 #endif
137 #if IS_ENABLED(CONFIG_MPLS)
138 struct netns_mpls mpls;
139 #endif
140 struct sock *diag_nlsk;
141 atomic_t fnhe_genid;
144 #include <linux/seq_file_net.h>
146 /* Init's network namespace */
147 extern struct net init_net;
149 #ifdef CONFIG_NET_NS
150 struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns,
151 struct net *old_net);
153 #else /* CONFIG_NET_NS */
154 #include <linux/sched.h>
155 #include <linux/nsproxy.h>
156 static inline struct net *copy_net_ns(unsigned long flags,
157 struct user_namespace *user_ns, struct net *old_net)
159 if (flags & CLONE_NEWNET)
160 return ERR_PTR(-EINVAL);
161 return old_net;
163 #endif /* CONFIG_NET_NS */
166 extern struct list_head net_namespace_list;
168 struct net *get_net_ns_by_pid(pid_t pid);
169 struct net *get_net_ns_by_fd(int pid);
171 #ifdef CONFIG_SYSCTL
172 void ipx_register_sysctl(void);
173 void ipx_unregister_sysctl(void);
174 #else
175 #define ipx_register_sysctl()
176 #define ipx_unregister_sysctl()
177 #endif
179 #ifdef CONFIG_NET_NS
180 void __put_net(struct net *net);
182 static inline struct net *get_net(struct net *net)
184 atomic_inc(&net->count);
185 return net;
188 static inline struct net *maybe_get_net(struct net *net)
190 /* Used when we know struct net exists but we
191 * aren't guaranteed a previous reference count
192 * exists. If the reference count is zero this
193 * function fails and returns NULL.
195 if (!atomic_inc_not_zero(&net->count))
196 net = NULL;
197 return net;
200 static inline void put_net(struct net *net)
202 if (atomic_dec_and_test(&net->count))
203 __put_net(net);
206 static inline
207 int net_eq(const struct net *net1, const struct net *net2)
209 return net1 == net2;
212 void net_drop_ns(void *);
214 #else
216 static inline struct net *get_net(struct net *net)
218 return net;
221 static inline void put_net(struct net *net)
225 static inline struct net *maybe_get_net(struct net *net)
227 return net;
230 static inline
231 int net_eq(const struct net *net1, const struct net *net2)
233 return 1;
236 #define net_drop_ns NULL
237 #endif
240 typedef struct {
241 #ifdef CONFIG_NET_NS
242 struct net *net;
243 #endif
244 } possible_net_t;
246 static inline void write_pnet(possible_net_t *pnet, struct net *net)
248 #ifdef CONFIG_NET_NS
249 pnet->net = net;
250 #endif
253 static inline struct net *read_pnet(const possible_net_t *pnet)
255 #ifdef CONFIG_NET_NS
256 return pnet->net;
257 #else
258 return &init_net;
259 #endif
262 #define for_each_net(VAR) \
263 list_for_each_entry(VAR, &net_namespace_list, list)
265 #define for_each_net_rcu(VAR) \
266 list_for_each_entry_rcu(VAR, &net_namespace_list, list)
268 #ifdef CONFIG_NET_NS
269 #define __net_init
270 #define __net_exit
271 #define __net_initdata
272 #define __net_initconst
273 #else
274 #define __net_init __init
275 #define __net_exit __exit_refok
276 #define __net_initdata __initdata
277 #define __net_initconst __initconst
278 #endif
280 int peernet2id_alloc(struct net *net, struct net *peer);
281 int peernet2id(struct net *net, struct net *peer);
282 bool peernet_has_id(struct net *net, struct net *peer);
283 struct net *get_net_ns_by_id(struct net *net, int id);
285 struct pernet_operations {
286 struct list_head list;
287 int (*init)(struct net *net);
288 void (*exit)(struct net *net);
289 void (*exit_batch)(struct list_head *net_exit_list);
290 int *id;
291 size_t size;
295 * Use these carefully. If you implement a network device and it
296 * needs per network namespace operations use device pernet operations,
297 * otherwise use pernet subsys operations.
299 * Network interfaces need to be removed from a dying netns _before_
300 * subsys notifiers can be called, as most of the network code cleanup
301 * (which is done from subsys notifiers) runs with the assumption that
302 * dev_remove_pack has been called so no new packets will arrive during
303 * and after the cleanup functions have been called. dev_remove_pack
304 * is not per namespace so instead the guarantee of no more packets
305 * arriving in a network namespace is provided by ensuring that all
306 * network devices and all sockets have left the network namespace
307 * before the cleanup methods are called.
309 * For the longest time the ipv4 icmp code was registered as a pernet
310 * device which caused kernel oops, and panics during network
311 * namespace cleanup. So please don't get this wrong.
313 int register_pernet_subsys(struct pernet_operations *);
314 void unregister_pernet_subsys(struct pernet_operations *);
315 int register_pernet_device(struct pernet_operations *);
316 void unregister_pernet_device(struct pernet_operations *);
318 struct ctl_table;
319 struct ctl_table_header;
321 #ifdef CONFIG_SYSCTL
322 int net_sysctl_init(void);
323 struct ctl_table_header *register_net_sysctl(struct net *net, const char *path,
324 struct ctl_table *table);
325 void unregister_net_sysctl_table(struct ctl_table_header *header);
326 #else
327 static inline int net_sysctl_init(void) { return 0; }
328 static inline struct ctl_table_header *register_net_sysctl(struct net *net,
329 const char *path, struct ctl_table *table)
331 return NULL;
333 static inline void unregister_net_sysctl_table(struct ctl_table_header *header)
336 #endif
338 static inline int rt_genid_ipv4(struct net *net)
340 return atomic_read(&net->ipv4.rt_genid);
343 static inline void rt_genid_bump_ipv4(struct net *net)
345 atomic_inc(&net->ipv4.rt_genid);
348 extern void (*__fib6_flush_trees)(struct net *net);
349 static inline void rt_genid_bump_ipv6(struct net *net)
351 if (__fib6_flush_trees)
352 __fib6_flush_trees(net);
355 #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
356 static inline struct netns_ieee802154_lowpan *
357 net_ieee802154_lowpan(struct net *net)
359 return &net->ieee802154_lowpan;
361 #endif
363 /* For callers who don't really care about whether it's IPv4 or IPv6 */
364 static inline void rt_genid_bump_all(struct net *net)
366 rt_genid_bump_ipv4(net);
367 rt_genid_bump_ipv6(net);
370 static inline int fnhe_genid(struct net *net)
372 return atomic_read(&net->fnhe_genid);
375 static inline void fnhe_genid_bump(struct net *net)
377 atomic_inc(&net->fnhe_genid);
380 #endif /* __NET_NET_NAMESPACE_H */