47 struct net init_net = {
75 u64 __net_gen_cookie(struct net *net)  in __net_gen_cookie()  argument
78 		u64 res = atomic64_read(&net->net_cookie);  in __net_gen_cookie()
83 		atomic64_cmpxchg(&net->net_cookie, 0, res);  in __net_gen_cookie()
99 static int net_assign_generic(struct net *net, unsigned int id, void *data)  in net_assign_generic()  argument
105 	old_ng = rcu_dereference_protected(net->gen,  in net_assign_generic()
131 	rcu_assign_pointer(net->gen, ng);  in net_assign_generic()
136 static int ops_init(const struct pernet_operations *ops, struct net *net)  in ops_init()  argument
146 		err = net_assign_generic(net, *ops->id, data);  in ops_init()
152 		err = ops->init(net);  in ops_init()
163 static void ops_free(const struct pernet_operations *ops, struct net *net)  in ops_free()  argument
166 		kfree(net_generic(net, *ops->id));  in ops_free()
173 	struct net *net;  in ops_pre_exit_list()  local
176 		list_for_each_entry(net, net_exit_list, exit_list)  in ops_pre_exit_list()
177 			ops->pre_exit(net);  in ops_pre_exit_list()
184 	struct net *net;  in ops_exit_list()  local
186 		list_for_each_entry(net, net_exit_list, exit_list)  in ops_exit_list()
187 			ops->exit(net);  in ops_exit_list()
196 	struct net *net;  in ops_free_list()  local
198 		list_for_each_entry(net, net_exit_list, exit_list)  in ops_free_list()
199 			ops_free(ops, net);  in ops_free_list()
204 static int alloc_netid(struct net *net, struct net *peer, int reqid)  in alloc_netid()  argument
213 	return idr_alloc(&net->netns_ids, peer, min, max, GFP_ATOMIC);  in alloc_netid()
222 static int net_eq_idr(int id, void *net, void *peer)  in net_eq_idr()  argument
224 	if (net_eq(net, peer))  in net_eq_idr()
230 static int __peernet2id(const struct net *net, struct net *peer)  in __peernet2id()  argument
232 	int id = idr_for_each(&net->netns_ids, net_eq_idr, peer);  in __peernet2id()
243 static void rtnl_net_notifyid(struct net *net, int cmd, int id, u32 portid,
248 int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp)  in peernet2id_alloc()  argument
252 	if (refcount_read(&net->count) == 0)  in peernet2id_alloc()
255 	spin_lock_bh(&net->nsid_lock);  in peernet2id_alloc()
256 	id = __peernet2id(net, peer);  in peernet2id_alloc()
258 		spin_unlock_bh(&net->nsid_lock);  in peernet2id_alloc()
268 		spin_unlock_bh(&net->nsid_lock);  in peernet2id_alloc()
272 	id = alloc_netid(net, peer, -1);  in peernet2id_alloc()
273 	spin_unlock_bh(&net->nsid_lock);  in peernet2id_alloc()
279 	rtnl_net_notifyid(net, RTM_NEWNSID, id, 0, NULL, gfp);  in peernet2id_alloc()
286 int peernet2id(const struct net *net, struct net *peer)  in peernet2id()  argument
291 	id = __peernet2id(net, peer);  in peernet2id()
301 bool peernet_has_id(const struct net *net, struct net *peer)  in peernet_has_id()  argument
303 	return peernet2id(net, peer) >= 0;  in peernet_has_id()
306 struct net *get_net_ns_by_id(const struct net *net, int id)  in get_net_ns_by_id()  argument
308 	struct net *peer;  in get_net_ns_by_id()
314 	peer = idr_find(&net->netns_ids, id);  in get_net_ns_by_id()
325 static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)  in setup_net()  argument
332 	refcount_set(&net->count, 1);  in setup_net()
333 	refcount_set(&net->passive, 1);  in setup_net()
334 	get_random_bytes(&net->hash_mix, sizeof(u32));  in setup_net()
335 	net->dev_base_seq = 1;  in setup_net()
336 	net->user_ns = user_ns;  in setup_net()
337 	idr_init(&net->netns_ids);  in setup_net()
338 	spin_lock_init(&net->nsid_lock);  in setup_net()
339 	mutex_init(&net->ipv4.ra_mutex);  in setup_net()
342 		error = ops_init(ops, net);  in setup_net()
347 	list_add_tail_rcu(&net->list, &net_namespace_list);  in setup_net()
356 	list_add(&net->exit_list, &net_exit_list);  in setup_net()
375 static int __net_init net_defaults_init_net(struct net *net)  in net_defaults_init_net()  argument
377 	net->core.sysctl_somaxconn = SOMAXCONN;  in net_defaults_init_net()
409 static struct net *net_alloc(void)  in net_alloc()
411 	struct net *net = NULL;  in net_alloc()  local
418 	net = kmem_cache_zalloc(net_cachep, GFP_KERNEL);  in net_alloc()
419 	if (!net)  in net_alloc()
423 	net->key_domain = kzalloc(sizeof(struct key_tag), GFP_KERNEL);  in net_alloc()
424 	if (!net->key_domain)  in net_alloc()
426 	refcount_set(&net->key_domain->usage, 1);  in net_alloc()
429 	rcu_assign_pointer(net->gen, ng);  in net_alloc()
431 	return net;  in net_alloc()
435 	kmem_cache_free(net_cachep, net);  in net_alloc()
436 	net = NULL;  in net_alloc()
443 static void net_free(struct net *net)  in net_free()  argument
445 	kfree(rcu_access_pointer(net->gen));  in net_free()
446 	kmem_cache_free(net_cachep, net);  in net_free()
451 	struct net *ns = p;  in net_drop_ns()
456 struct net *copy_net_ns(unsigned long flags,  in copy_net_ns()
457 			struct user_namespace *user_ns, struct net *old_net)  in copy_net_ns()
460 	struct net *net;  in copy_net_ns()  local
470 	net = net_alloc();  in copy_net_ns()
471 	if (!net) {  in copy_net_ns()
475 	refcount_set(&net->passive, 1);  in copy_net_ns()
476 	net->ucounts = ucounts;  in copy_net_ns()
483 	rv = setup_net(net, user_ns);  in copy_net_ns()
489 		key_remove_domain(net->key_domain);  in copy_net_ns()
491 		net_drop_ns(net);  in copy_net_ns()
496 	return net;  in copy_net_ns()
508 void net_ns_get_ownership(const struct net *net, kuid_t *uid, kgid_t *gid)  in net_ns_get_ownership()  argument
510 	if (net) {  in net_ns_get_ownership()
511 		kuid_t ns_root_uid = make_kuid(net->user_ns, 0);  in net_ns_get_ownership()
512 		kgid_t ns_root_gid = make_kgid(net->user_ns, 0);  in net_ns_get_ownership()
526 static void unhash_nsid(struct net *net, struct net *last)  in unhash_nsid()  argument
528 	struct net *tmp;  in unhash_nsid()
539 		id = __peernet2id(tmp, net);  in unhash_nsid()
549 	spin_lock_bh(&net->nsid_lock);  in unhash_nsid()
550 	idr_destroy(&net->netns_ids);  in unhash_nsid()
551 	spin_unlock_bh(&net->nsid_lock);  in unhash_nsid()
559 	struct net *net, *tmp, *last;  in cleanup_net()  local
570 	llist_for_each_entry(net, net_kill_list, cleanup_list)  in cleanup_net()
571 		list_del_rcu(&net->list);  in cleanup_net()
582 	last = list_last_entry(&net_namespace_list, struct net, list);  in cleanup_net()
585 	llist_for_each_entry(net, net_kill_list, cleanup_list) {  in cleanup_net()
586 		unhash_nsid(net, last);  in cleanup_net()
587 		list_add_tail(&net->exit_list, &net_exit_list);  in cleanup_net()
618 	list_for_each_entry_safe(net, tmp, &net_exit_list, exit_list) {  in cleanup_net()
619 		list_del_init(&net->exit_list);  in cleanup_net()
620 		dec_net_namespaces(net->ucounts);  in cleanup_net()
621 		key_remove_domain(net->key_domain);  in cleanup_net()
622 		put_user_ns(net->user_ns);  in cleanup_net()
623 		net_drop_ns(net);  in cleanup_net()
645 void __put_net(struct net *net)  in __put_net()  argument
648 	if (llist_add(&net->cleanup_list, &cleanup_list))  in __put_net()
653 struct net *get_net_ns_by_fd(int fd)  in get_net_ns_by_fd()
657 	struct net *net;  in get_net_ns_by_fd()  local
665 		net = get_net(container_of(ns, struct net, ns));  in get_net_ns_by_fd()
667 		net = ERR_PTR(-EINVAL);  in get_net_ns_by_fd()
670 	return net;  in get_net_ns_by_fd()
674 struct net *get_net_ns_by_fd(int fd)  in get_net_ns_by_fd()
681 struct net *get_net_ns_by_pid(pid_t pid)  in get_net_ns_by_pid()
684 	struct net *net;  in get_net_ns_by_pid()  local
687 	net = ERR_PTR(-ESRCH);  in get_net_ns_by_pid()
695 			net = get_net(nsproxy->net_ns);  in get_net_ns_by_pid()
699 	return net;  in get_net_ns_by_pid()
703 static __net_init int net_ns_net_init(struct net *net)  in net_ns_net_init()  argument
706 	net->ns.ops = &netns_operations;  in net_ns_net_init()
708 	return ns_alloc_inum(&net->ns);  in net_ns_net_init()
711 static __net_exit void net_ns_net_exit(struct net *net)  in net_ns_net_exit()  argument
713 	ns_free_inum(&net->ns);  in net_ns_net_exit()
732 	struct net *net = sock_net(skb->sk);  in rtnl_net_newid()  local
735 	struct net *peer;  in rtnl_net_newid()
764 	spin_lock_bh(&net->nsid_lock);  in rtnl_net_newid()
765 	if (__peernet2id(net, peer) >= 0) {  in rtnl_net_newid()
766 		spin_unlock_bh(&net->nsid_lock);  in rtnl_net_newid()
774 	err = alloc_netid(net, peer, nsid);  in rtnl_net_newid()
775 	spin_unlock_bh(&net->nsid_lock);  in rtnl_net_newid()
777 		rtnl_net_notifyid(net, RTM_NEWNSID, err, NETLINK_CB(skb).portid,  in rtnl_net_newid()
876 	struct net *net = sock_net(skb->sk);  in rtnl_net_getid()  local
883 	struct net *peer, *target = net;  in rtnl_net_getid()
898 		peer = get_net_ns_by_id(net, nla_get_s32(tb[NETNSA_NSID]));  in rtnl_net_getid()
925 		fillargs.ref_nsid = peernet2id(net, peer);  in rtnl_net_getid()
939 	err = rtnl_unicast(msg, net, NETLINK_CB(skb).portid);  in rtnl_net_getid()
952 	struct net *tgt_net;
953 	struct net *ref_net;
1000 			struct net *net;  in rtnl_valid_dump_net_req()  local
1002 			net = rtnl_get_net_ns_capable(sk, nla_get_s32(tb[i]));  in rtnl_valid_dump_net_req()
1003 			if (IS_ERR(net)) {  in rtnl_valid_dump_net_req()
1007 				return PTR_ERR(net);  in rtnl_valid_dump_net_req()
1011 			net_cb->tgt_net = net;  in rtnl_valid_dump_net_req()
1056 static void rtnl_net_notifyid(struct net *net, int cmd, int id, u32 portid,  in rtnl_net_notifyid()  argument
1076 	rtnl_notify(msg, net, portid, RTNLGRP_NSID, nlh, gfp);  in rtnl_net_notifyid()
1082 	rtnl_set_sk_err(net, RTNLGRP_NSID, err);  in rtnl_net_notifyid()
1090 	net_cachep = kmem_cache_create("net_namespace", sizeof(struct net),  in net_ns_init()
1134 	struct net *net;  in __register_pernet_operations()  local
1143 		for_each_net(net) {  in __register_pernet_operations()
1144 			error = ops_init(ops, net);  in __register_pernet_operations()
1147 			list_add_tail(&net->exit_list, &net_exit_list);  in __register_pernet_operations()
1164 	struct net *net;  in __unregister_pernet_operations()  local
1169 	for_each_net(net)  in __unregister_pernet_operations()
1170 		list_add_tail(&net->exit_list, &net_exit_list);  in __unregister_pernet_operations()
1338 	struct net *net = NULL;  in netns_get()  local
1344 		net = get_net(nsproxy->net_ns);  in netns_get()
1347 	return net ? &net->ns : NULL;  in netns_get()
1350 static inline struct net *to_net_ns(struct ns_common *ns)  in to_net_ns()
1352 	return container_of(ns, struct net, ns);  in to_net_ns()
1363 	struct net *net = to_net_ns(ns);  in netns_install()  local
1365 	if (!ns_capable(net->user_ns, CAP_SYS_ADMIN) ||  in netns_install()
1370 	nsproxy->net_ns = get_net(net);  in netns_install()