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/netfilter.h>
27 #include <net/netns/conntrack.h>
30 #include <net/netns/flow_table.h>
32 #include <net/netns/nftables.h>
33 #include <net/netns/xfrm.h>
34 #include <net/netns/mpls.h>
35 #include <net/netns/can.h>
36 #include <net/netns/xdp.h>
37 #include <net/netns/smc.h>
38 #include <net/netns/bpf.h>
39 #include <net/netns/mctp.h>
40 #include <net/net_trackers.h>
61 struct net {  struct
78 						 * methods on dead net (  argument
204 extern struct net init_net;  argument
207 struct net *copy_net_ns(u64 flags, struct user_namespace *user_ns,
208 			struct net *old_net);
210 void net_ns_get_ownership(const struct net *net, kuid_t *uid, kgid_t *gid);
215 struct net *get_net_ns_by_fd(int fd);
221 static inline struct net *copy_net_ns(u64 flags,  in copy_net_ns()
222 	struct user_namespace *user_ns, struct net *old_net)  in copy_net_ns()
229 static inline void net_ns_get_ownership(const struct net *net,  in net_ns_get_ownership()  argument
243 static inline struct net *get_net_ns_by_fd(int fd)  in get_net_ns_by_fd()
252 struct net *get_net_ns_by_pid(pid_t pid);
263 void __put_net(struct net *net);
265 static inline struct net *to_net_ns(struct ns_common *ns)  in to_net_ns()
267 	return container_of(ns, struct net, ns);  in to_net_ns()
271 static inline struct net *get_net(struct net *net)  in get_net()  argument
273 	ns_ref_inc(net);  in get_net()
274 	return net;  in get_net()
277 static inline struct net *maybe_get_net(struct net *net)  in maybe_get_net()  argument
279 	/* Used when we know struct net exists but we  in maybe_get_net()
284 	if (!ns_ref_get(net))  in maybe_get_net()
285 		net = NULL;  in maybe_get_net()
286 	return net;  in maybe_get_net()
290 static inline void put_net(struct net *net)  in put_net()  argument
292 	if (ns_ref_put(net))  in put_net()
293 		__put_net(net);  in put_net()
297 int net_eq(const struct net *net1, const struct net *net2)  in net_eq()
302 static inline int check_net(const struct net *net)  in check_net()  argument
304 	return ns_ref_read(net) != 0;  in check_net()
308 void net_passive_dec(struct net *net);
312 static inline struct net *get_net(struct net *net)  in get_net()  argument
314 	return net;  in get_net()
317 static inline void put_net(struct net *net)  in put_net()  argument
321 static inline struct net *maybe_get_net(struct net *net)  in maybe_get_net()  argument
323 	return net;  in maybe_get_net()
327 int net_eq(const struct net *net1, const struct net *net2)  in net_eq()
332 static inline int check_net(const struct net *net)  in check_net()  argument
339 static inline void net_passive_dec(struct net *net)  in net_passive_dec()  argument
341 	refcount_dec(&net->passive);  in net_passive_dec()
345 static inline void net_passive_inc(struct net *net)  in net_passive_inc()  argument
347 	refcount_inc(&net->passive);  in net_passive_inc()
351 static inline bool net_initialized(const struct net *net)  in net_initialized()  argument
353 	return READ_ONCE(net->list.next);  in net_initialized()
356 static inline void __netns_tracker_alloc(struct net *net,  in __netns_tracker_alloc()  argument
362 	ref_tracker_alloc(refcounted ? &net->refcnt_tracker :  in __netns_tracker_alloc()
363 				       &net->notrefcnt_tracker,  in __netns_tracker_alloc()
368 static inline void netns_tracker_alloc(struct net *net, netns_tracker *tracker,  in netns_tracker_alloc()  argument
371 	__netns_tracker_alloc(net, tracker, true, gfp);  in netns_tracker_alloc()
374 static inline void __netns_tracker_free(struct net *net,  in __netns_tracker_free()  argument
379        ref_tracker_free(refcounted ? &net->refcnt_tracker :  in __netns_tracker_free()
380 				     &net->notrefcnt_tracker, tracker);  in __netns_tracker_free()
384 static inline struct net *get_net_track(struct net *net,  in get_net_track()  argument
387 	get_net(net);  in get_net_track()
388 	netns_tracker_alloc(net, tracker, gfp);  in get_net_track()
389 	return net;  in get_net_track()
392 static inline void put_net_track(struct net *net, netns_tracker *tracker)  in put_net_track()  argument
394 	__netns_tracker_free(net, tracker, true);  in put_net_track()
395 	put_net(net);  in put_net_track()
400 	struct net __rcu *net;  member
404 static inline void write_pnet(possible_net_t *pnet, struct net *net)  in write_pnet()  argument
407 	rcu_assign_pointer(pnet->net, net);  in write_pnet()
411 static inline struct net *read_pnet(const possible_net_t *pnet)  in read_pnet()
414 	return rcu_dereference_protected(pnet->net, true);  in read_pnet()
420 static inline struct net *read_pnet_rcu(const possible_net_t *pnet)  in read_pnet_rcu()
423 	return rcu_dereference(pnet->net);  in read_pnet_rcu()
449 int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp);
450 int peernet2id(const struct net *net, struct net *peer);
451 bool peernet_has_id(const struct net *net, struct net *peer);
452 struct net *get_net_ns_by_id(const struct net *net, int id);
458 	 * More than one net may be constructed and destructed
469 	 * Then, destruction of a group of net requires single
471 	 * instead of separate synchronize_rcu() for every net.
478 	int (*init)(struct net *net);
479 	void (*pre_exit)(struct net *net);
480 	void (*exit)(struct net *net);
483 	void (*exit_rtnl)(struct net *net,
515 #define register_net_sysctl(net, path, table)	\  argument
516 	register_net_sysctl_sz(net, path, table, ARRAY_SIZE(table))
519 struct ctl_table_header *register_net_sysctl_sz(struct net *net, const char *path,
524 static inline struct ctl_table_header *register_net_sysctl_sz(struct net *net,  in register_net_sysctl_sz()  argument
534 static inline int rt_genid_ipv4(const struct net *net)  in rt_genid_ipv4()  argument
536 	return atomic_read(&net->ipv4.rt_genid);  in rt_genid_ipv4()
540 static inline int rt_genid_ipv6(const struct net *net)  in rt_genid_ipv6()  argument
542 	return atomic_read(&net->ipv6.fib6_sernum);  in rt_genid_ipv6()
546 static inline void rt_genid_bump_ipv4(struct net *net)  in rt_genid_bump_ipv4()  argument
548 	atomic_inc(&net->ipv4.rt_genid);  in rt_genid_bump_ipv4()
551 extern void (*__fib6_flush_trees)(struct net *net);
552 static inline void rt_genid_bump_ipv6(struct net *net)  in rt_genid_bump_ipv6()  argument
555 		__fib6_flush_trees(net);  in rt_genid_bump_ipv6()
560 net_ieee802154_lowpan(struct net *net)  in net_ieee802154_lowpan()  argument
562 	return &net->ieee802154_lowpan;  in net_ieee802154_lowpan()
567 static inline void rt_genid_bump_all(struct net *net)  in rt_genid_bump_all()  argument
569 	rt_genid_bump_ipv4(net);  in rt_genid_bump_all()
570 	rt_genid_bump_ipv6(net);  in rt_genid_bump_all()
573 static inline int fnhe_genid(const struct net *net)  in fnhe_genid()  argument
575 	return atomic_read(&net->fnhe_genid);  in fnhe_genid()
578 static inline void fnhe_genid_bump(struct net *net)  in fnhe_genid_bump()  argument
580 	atomic_inc(&net->fnhe_genid);  in fnhe_genid_bump()