15f256becSEric W. Biederman /* 25f256becSEric W. Biederman * Operations on the network namespace 35f256becSEric W. Biederman */ 45f256becSEric W. Biederman #ifndef __NET_NET_NAMESPACE_H 55f256becSEric W. Biederman #define __NET_NET_NAMESPACE_H 65f256becSEric W. Biederman 75f256becSEric W. Biederman #include <asm/atomic.h> 85f256becSEric W. Biederman #include <linux/workqueue.h> 95f256becSEric W. Biederman #include <linux/list.h> 105f256becSEric W. Biederman 11a0a53c8bSDenis V. Lunev #include <net/netns/unix.h> 122aaef4e4SDenis V. Lunev #include <net/netns/packet.h> 138afd351cSPavel Emelyanov #include <net/netns/ipv4.h> 14b0f159dbSDaniel Lezcano #include <net/netns/ipv6.h> 158d870052SAlexey Dobriyan #include <net/netns/x_tables.h> 16a0a53c8bSDenis V. Lunev 17457c4cbcSEric W. Biederman struct proc_dir_entry; 182774c7abSEric W. Biederman struct net_device; 1997c53cacSDenis V. Lunev struct sock; 201597fbc0SPavel Emelyanov struct ctl_table_header; 211597fbc0SPavel Emelyanov 225f256becSEric W. Biederman struct net { 235f256becSEric W. Biederman atomic_t count; /* To decided when the network 245f256becSEric W. Biederman * namespace should be freed. 255f256becSEric W. Biederman */ 265f256becSEric W. Biederman atomic_t use_count; /* To track references we 275f256becSEric W. Biederman * destroy on demand 285f256becSEric W. Biederman */ 295f256becSEric W. Biederman struct list_head list; /* list of network namespaces */ 305f256becSEric W. Biederman struct work_struct work; /* work struct for freeing */ 31457c4cbcSEric W. Biederman 32457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net; 33457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net_stat; 34457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net_root; 35881d966bSEric W. Biederman 3695bdfccbSEric W. Biederman struct list_head sysctl_table_headers; 3795bdfccbSEric W. Biederman 382774c7abSEric W. Biederman struct net_device *loopback_dev; /* The loopback */ 392774c7abSEric W. Biederman 40881d966bSEric W. Biederman struct list_head dev_base_head; 41881d966bSEric W. Biederman struct hlist_head *dev_name_head; 42881d966bSEric W. Biederman struct hlist_head *dev_index_head; 4397c53cacSDenis V. Lunev 445fd30ee7SDenis V. Lunev /* core fib_rules */ 455fd30ee7SDenis V. Lunev struct list_head rules_ops; 465fd30ee7SDenis V. Lunev spinlock_t rules_mod_lock; 475fd30ee7SDenis V. Lunev 4897c53cacSDenis V. Lunev struct sock *rtnl; /* rtnetlink socket */ 49d12d01d6SDenis V. Lunev 50024626e3SPavel Emelyanov /* core sysctls */ 51024626e3SPavel Emelyanov struct ctl_table_header *sysctl_core_hdr; 52b8e1f9b5SPavel Emelyanov int sysctl_somaxconn; 53024626e3SPavel Emelyanov 542aaef4e4SDenis V. Lunev struct netns_packet packet; 55a0a53c8bSDenis V. Lunev struct netns_unix unx; 568afd351cSPavel Emelyanov struct netns_ipv4 ipv4; 57b0f159dbSDaniel Lezcano #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 58b0f159dbSDaniel Lezcano struct netns_ipv6 ipv6; 59b0f159dbSDaniel Lezcano #endif 608d870052SAlexey Dobriyan #ifdef CONFIG_NETFILTER 618d870052SAlexey Dobriyan struct netns_xt xt; 628d870052SAlexey Dobriyan #endif 635f256becSEric W. Biederman }; 645f256becSEric W. Biederman 654fabcd71SDaniel Lezcano #ifdef CONFIG_NET 664fabcd71SDaniel Lezcano /* Init's network namespace */ 675f256becSEric W. Biederman extern struct net init_net; 684fabcd71SDaniel Lezcano #define INIT_NET_NS(net_ns) .net_ns = &init_net, 694fabcd71SDaniel Lezcano #else 704fabcd71SDaniel Lezcano #define INIT_NET_NS(net_ns) 714fabcd71SDaniel Lezcano #endif 724fabcd71SDaniel Lezcano 735f256becSEric W. Biederman extern struct list_head net_namespace_list; 745f256becSEric W. Biederman 759dd776b6SEric W. Biederman #ifdef CONFIG_NET 769dd776b6SEric W. Biederman extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); 779dd776b6SEric W. Biederman #else 789dd776b6SEric W. Biederman static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) 799dd776b6SEric W. Biederman { 809dd776b6SEric W. Biederman /* There is nothing to copy so this is a noop */ 819dd776b6SEric W. Biederman return net_ns; 829dd776b6SEric W. Biederman } 839dd776b6SEric W. Biederman #endif 849dd776b6SEric W. Biederman 85d4655795SPavel Emelyanov #ifdef CONFIG_NET_NS 865f256becSEric W. Biederman extern void __put_net(struct net *net); 875f256becSEric W. Biederman 885f256becSEric W. Biederman static inline struct net *get_net(struct net *net) 895f256becSEric W. Biederman { 905f256becSEric W. Biederman atomic_inc(&net->count); 915f256becSEric W. Biederman return net; 925f256becSEric W. Biederman } 935f256becSEric W. Biederman 94077130c0SEric W. Biederman static inline struct net *maybe_get_net(struct net *net) 95077130c0SEric W. Biederman { 96077130c0SEric W. Biederman /* Used when we know struct net exists but we 97077130c0SEric W. Biederman * aren't guaranteed a previous reference count 98077130c0SEric W. Biederman * exists. If the reference count is zero this 99077130c0SEric W. Biederman * function fails and returns NULL. 100077130c0SEric W. Biederman */ 101077130c0SEric W. Biederman if (!atomic_inc_not_zero(&net->count)) 102077130c0SEric W. Biederman net = NULL; 103077130c0SEric W. Biederman return net; 104077130c0SEric W. Biederman } 105077130c0SEric W. Biederman 1065f256becSEric W. Biederman static inline void put_net(struct net *net) 1075f256becSEric W. Biederman { 1085f256becSEric W. Biederman if (atomic_dec_and_test(&net->count)) 1095f256becSEric W. Biederman __put_net(net); 1105f256becSEric W. Biederman } 1115f256becSEric W. Biederman 1125f256becSEric W. Biederman static inline struct net *hold_net(struct net *net) 1135f256becSEric W. Biederman { 1145f256becSEric W. Biederman atomic_inc(&net->use_count); 1155f256becSEric W. Biederman return net; 1165f256becSEric W. Biederman } 1175f256becSEric W. Biederman 1185f256becSEric W. Biederman static inline void release_net(struct net *net) 1195f256becSEric W. Biederman { 1205f256becSEric W. Biederman atomic_dec(&net->use_count); 1215f256becSEric W. Biederman } 122d4655795SPavel Emelyanov #else 123d4655795SPavel Emelyanov static inline struct net *get_net(struct net *net) 124d4655795SPavel Emelyanov { 125d4655795SPavel Emelyanov return net; 126d4655795SPavel Emelyanov } 127d4655795SPavel Emelyanov 128d4655795SPavel Emelyanov static inline void put_net(struct net *net) 129d4655795SPavel Emelyanov { 130d4655795SPavel Emelyanov } 131d4655795SPavel Emelyanov 132d4655795SPavel Emelyanov static inline struct net *hold_net(struct net *net) 133d4655795SPavel Emelyanov { 134d4655795SPavel Emelyanov return net; 135d4655795SPavel Emelyanov } 136d4655795SPavel Emelyanov 137d4655795SPavel Emelyanov static inline void release_net(struct net *net) 138d4655795SPavel Emelyanov { 139d4655795SPavel Emelyanov } 140d4655795SPavel Emelyanov 141d4655795SPavel Emelyanov static inline struct net *maybe_get_net(struct net *net) 142d4655795SPavel Emelyanov { 143d4655795SPavel Emelyanov return net; 144d4655795SPavel Emelyanov } 145d4655795SPavel Emelyanov #endif 1465f256becSEric W. Biederman 1475f256becSEric W. Biederman #define for_each_net(VAR) \ 1485f256becSEric W. Biederman list_for_each_entry(VAR, &net_namespace_list, list) 1495f256becSEric W. Biederman 1504665079cSPavel Emelyanov #ifdef CONFIG_NET_NS 1514665079cSPavel Emelyanov #define __net_init 1524665079cSPavel Emelyanov #define __net_exit 153022cbae6SDenis V. Lunev #define __net_initdata 1544665079cSPavel Emelyanov #else 1554665079cSPavel Emelyanov #define __net_init __init 1564665079cSPavel Emelyanov #define __net_exit __exit_refok 157022cbae6SDenis V. Lunev #define __net_initdata __initdata 1584665079cSPavel Emelyanov #endif 1595f256becSEric W. Biederman 1605f256becSEric W. Biederman struct pernet_operations { 1615f256becSEric W. Biederman struct list_head list; 1625f256becSEric W. Biederman int (*init)(struct net *net); 1635f256becSEric W. Biederman void (*exit)(struct net *net); 1645f256becSEric W. Biederman }; 1655f256becSEric W. Biederman 1665f256becSEric W. Biederman extern int register_pernet_subsys(struct pernet_operations *); 1675f256becSEric W. Biederman extern void unregister_pernet_subsys(struct pernet_operations *); 1685f256becSEric W. Biederman extern int register_pernet_device(struct pernet_operations *); 1695f256becSEric W. Biederman extern void unregister_pernet_device(struct pernet_operations *); 1705f256becSEric W. Biederman 17195bdfccbSEric W. Biederman struct ctl_path; 17295bdfccbSEric W. Biederman struct ctl_table; 17395bdfccbSEric W. Biederman struct ctl_table_header; 17495bdfccbSEric W. Biederman extern struct ctl_table_header *register_net_sysctl_table(struct net *net, 17595bdfccbSEric W. Biederman const struct ctl_path *path, struct ctl_table *table); 17695bdfccbSEric W. Biederman extern void unregister_net_sysctl_table(struct ctl_table_header *header); 17795bdfccbSEric W. Biederman 1785f256becSEric W. Biederman #endif /* __NET_NET_NAMESPACE_H */ 179