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 118efa6e93SPavel Emelyanov #include <net/netns/core.h> 12852566f5SPavel Emelyanov #include <net/netns/mib.h> 13a0a53c8bSDenis V. Lunev #include <net/netns/unix.h> 142aaef4e4SDenis V. Lunev #include <net/netns/packet.h> 158afd351cSPavel Emelyanov #include <net/netns/ipv4.h> 16b0f159dbSDaniel Lezcano #include <net/netns/ipv6.h> 1767019cc9SPavel Emelyanov #include <net/netns/dccp.h> 188d870052SAlexey Dobriyan #include <net/netns/x_tables.h> 19dfdb8d79SAlexey Dobriyan #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) 20dfdb8d79SAlexey Dobriyan #include <net/netns/conntrack.h> 21dfdb8d79SAlexey Dobriyan #endif 22a0a53c8bSDenis V. Lunev 23457c4cbcSEric W. Biederman struct proc_dir_entry; 242774c7abSEric W. Biederman struct net_device; 2597c53cacSDenis V. Lunev struct sock; 261597fbc0SPavel Emelyanov struct ctl_table_header; 27dec827d1SPavel Emelyanov struct net_generic; 281597fbc0SPavel Emelyanov 295f256becSEric W. Biederman struct net { 305f256becSEric W. Biederman atomic_t count; /* To decided when the network 315f256becSEric W. Biederman * namespace should be freed. 325f256becSEric W. Biederman */ 335d1e4468SDenis V. Lunev #ifdef NETNS_REFCNT_DEBUG 345f256becSEric W. Biederman atomic_t use_count; /* To track references we 355f256becSEric W. Biederman * destroy on demand 365f256becSEric W. Biederman */ 375d1e4468SDenis V. Lunev #endif 385f256becSEric W. Biederman struct list_head list; /* list of network namespaces */ 395f256becSEric W. Biederman struct work_struct work; /* work struct for freeing */ 40457c4cbcSEric W. Biederman 41457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net; 42457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net_stat; 43881d966bSEric W. Biederman 4473455092SAl Viro #ifdef CONFIG_SYSCTL 4573455092SAl Viro struct ctl_table_set sysctls; 4673455092SAl Viro #endif 4795bdfccbSEric W. Biederman 482774c7abSEric W. Biederman struct net_device *loopback_dev; /* The loopback */ 492774c7abSEric W. Biederman 50881d966bSEric W. Biederman struct list_head dev_base_head; 51881d966bSEric W. Biederman struct hlist_head *dev_name_head; 52881d966bSEric W. Biederman struct hlist_head *dev_index_head; 5397c53cacSDenis V. Lunev 545fd30ee7SDenis V. Lunev /* core fib_rules */ 555fd30ee7SDenis V. Lunev struct list_head rules_ops; 565fd30ee7SDenis V. Lunev spinlock_t rules_mod_lock; 575fd30ee7SDenis V. Lunev 5897c53cacSDenis V. Lunev struct sock *rtnl; /* rtnetlink socket */ 59d12d01d6SDenis V. Lunev 608efa6e93SPavel Emelyanov struct netns_core core; 61852566f5SPavel Emelyanov struct netns_mib mib; 622aaef4e4SDenis V. Lunev struct netns_packet packet; 63a0a53c8bSDenis V. Lunev struct netns_unix unx; 648afd351cSPavel Emelyanov struct netns_ipv4 ipv4; 65b0f159dbSDaniel Lezcano #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 66b0f159dbSDaniel Lezcano struct netns_ipv6 ipv6; 67b0f159dbSDaniel Lezcano #endif 6867019cc9SPavel Emelyanov #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) 6967019cc9SPavel Emelyanov struct netns_dccp dccp; 7067019cc9SPavel Emelyanov #endif 718d870052SAlexey Dobriyan #ifdef CONFIG_NETFILTER 728d870052SAlexey Dobriyan struct netns_xt xt; 73dfdb8d79SAlexey Dobriyan #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) 74dfdb8d79SAlexey Dobriyan struct netns_ct ct; 75dfdb8d79SAlexey Dobriyan #endif 768d870052SAlexey Dobriyan #endif 77dec827d1SPavel Emelyanov struct net_generic *gen; 785f256becSEric W. Biederman }; 795f256becSEric W. Biederman 80225c0a01SDenis V. Lunev 81c0f39322SDenis V. Lunev #include <linux/seq_file_net.h> 82c0f39322SDenis V. Lunev 834fabcd71SDaniel Lezcano /* Init's network namespace */ 845f256becSEric W. Biederman extern struct net init_net; 85a4aa834aSDenis V. Lunev 86a4aa834aSDenis V. Lunev #ifdef CONFIG_NET 874fabcd71SDaniel Lezcano #define INIT_NET_NS(net_ns) .net_ns = &init_net, 884fabcd71SDaniel Lezcano 899dd776b6SEric W. Biederman extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); 90225c0a01SDenis V. Lunev 91225c0a01SDenis V. Lunev #else /* CONFIG_NET */ 92225c0a01SDenis V. Lunev 93225c0a01SDenis V. Lunev #define INIT_NET_NS(net_ns) 94225c0a01SDenis V. Lunev 959dd776b6SEric W. Biederman static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) 969dd776b6SEric W. Biederman { 979dd776b6SEric W. Biederman /* There is nothing to copy so this is a noop */ 989dd776b6SEric W. Biederman return net_ns; 999dd776b6SEric W. Biederman } 100225c0a01SDenis V. Lunev #endif /* CONFIG_NET */ 101225c0a01SDenis V. Lunev 102225c0a01SDenis V. Lunev 103225c0a01SDenis V. Lunev extern struct list_head net_namespace_list; 1049dd776b6SEric W. Biederman 105d4655795SPavel Emelyanov #ifdef CONFIG_NET_NS 1065f256becSEric W. Biederman extern void __put_net(struct net *net); 1075f256becSEric W. Biederman 108b9f75f45SEric W. Biederman static inline int net_alive(struct net *net) 109b9f75f45SEric W. Biederman { 110b9f75f45SEric W. Biederman return net && atomic_read(&net->count); 111b9f75f45SEric W. Biederman } 112b9f75f45SEric W. Biederman 1135f256becSEric W. Biederman static inline struct net *get_net(struct net *net) 1145f256becSEric W. Biederman { 1155f256becSEric W. Biederman atomic_inc(&net->count); 1165f256becSEric W. Biederman return net; 1175f256becSEric W. Biederman } 1185f256becSEric W. Biederman 119077130c0SEric W. Biederman static inline struct net *maybe_get_net(struct net *net) 120077130c0SEric W. Biederman { 121077130c0SEric W. Biederman /* Used when we know struct net exists but we 122077130c0SEric W. Biederman * aren't guaranteed a previous reference count 123077130c0SEric W. Biederman * exists. If the reference count is zero this 124077130c0SEric W. Biederman * function fails and returns NULL. 125077130c0SEric W. Biederman */ 126077130c0SEric W. Biederman if (!atomic_inc_not_zero(&net->count)) 127077130c0SEric W. Biederman net = NULL; 128077130c0SEric W. Biederman return net; 129077130c0SEric W. Biederman } 130077130c0SEric W. Biederman 1315f256becSEric W. Biederman static inline void put_net(struct net *net) 1325f256becSEric W. Biederman { 1335f256becSEric W. Biederman if (atomic_dec_and_test(&net->count)) 1345f256becSEric W. Biederman __put_net(net); 1355f256becSEric W. Biederman } 1365f256becSEric W. Biederman 137878628fbSYOSHIFUJI Hideaki static inline 138878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 139878628fbSYOSHIFUJI Hideaki { 140878628fbSYOSHIFUJI Hideaki return net1 == net2; 141878628fbSYOSHIFUJI Hideaki } 142d4655795SPavel Emelyanov #else 143b9f75f45SEric W. Biederman 144b9f75f45SEric W. Biederman static inline int net_alive(struct net *net) 145b9f75f45SEric W. Biederman { 146b9f75f45SEric W. Biederman return 1; 147b9f75f45SEric W. Biederman } 148b9f75f45SEric W. Biederman 149d4655795SPavel Emelyanov static inline struct net *get_net(struct net *net) 150d4655795SPavel Emelyanov { 151d4655795SPavel Emelyanov return net; 152d4655795SPavel Emelyanov } 153d4655795SPavel Emelyanov 154d4655795SPavel Emelyanov static inline void put_net(struct net *net) 155d4655795SPavel Emelyanov { 156d4655795SPavel Emelyanov } 157d4655795SPavel Emelyanov 158d4655795SPavel Emelyanov static inline struct net *maybe_get_net(struct net *net) 159d4655795SPavel Emelyanov { 160d4655795SPavel Emelyanov return net; 161d4655795SPavel Emelyanov } 162878628fbSYOSHIFUJI Hideaki 163878628fbSYOSHIFUJI Hideaki static inline 164878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 165878628fbSYOSHIFUJI Hideaki { 166878628fbSYOSHIFUJI Hideaki return 1; 167878628fbSYOSHIFUJI Hideaki } 168d4655795SPavel Emelyanov #endif 1695f256becSEric W. Biederman 1705d1e4468SDenis V. Lunev 1715d1e4468SDenis V. Lunev #ifdef NETNS_REFCNT_DEBUG 1725d1e4468SDenis V. Lunev static inline struct net *hold_net(struct net *net) 1735d1e4468SDenis V. Lunev { 1745d1e4468SDenis V. Lunev if (net) 1755d1e4468SDenis V. Lunev atomic_inc(&net->use_count); 1765d1e4468SDenis V. Lunev return net; 1775d1e4468SDenis V. Lunev } 1785d1e4468SDenis V. Lunev 1795d1e4468SDenis V. Lunev static inline void release_net(struct net *net) 1805d1e4468SDenis V. Lunev { 1815d1e4468SDenis V. Lunev if (net) 1825d1e4468SDenis V. Lunev atomic_dec(&net->use_count); 1835d1e4468SDenis V. Lunev } 1845d1e4468SDenis V. Lunev #else 1855d1e4468SDenis V. Lunev static inline struct net *hold_net(struct net *net) 1865d1e4468SDenis V. Lunev { 1875d1e4468SDenis V. Lunev return net; 1885d1e4468SDenis V. Lunev } 1895d1e4468SDenis V. Lunev 1905d1e4468SDenis V. Lunev static inline void release_net(struct net *net) 1915d1e4468SDenis V. Lunev { 1925d1e4468SDenis V. Lunev } 1935d1e4468SDenis V. Lunev #endif 1945d1e4468SDenis V. Lunev 1958f424b5fSEric Dumazet #ifdef CONFIG_NET_NS 1968f424b5fSEric Dumazet 1978f424b5fSEric Dumazet static inline void write_pnet(struct net **pnet, struct net *net) 1988f424b5fSEric Dumazet { 1998f424b5fSEric Dumazet *pnet = net; 2008f424b5fSEric Dumazet } 2018f424b5fSEric Dumazet 2028f424b5fSEric Dumazet static inline struct net *read_pnet(struct net * const *pnet) 2038f424b5fSEric Dumazet { 2048f424b5fSEric Dumazet return *pnet; 2058f424b5fSEric Dumazet } 2068f424b5fSEric Dumazet 2078f424b5fSEric Dumazet #else 2088f424b5fSEric Dumazet 2098f424b5fSEric Dumazet #define write_pnet(pnet, net) do { (void)(net);} while (0) 2108f424b5fSEric Dumazet #define read_pnet(pnet) (&init_net) 2118f424b5fSEric Dumazet 2128f424b5fSEric Dumazet #endif 2135d1e4468SDenis V. Lunev 2145f256becSEric W. Biederman #define for_each_net(VAR) \ 2155f256becSEric W. Biederman list_for_each_entry(VAR, &net_namespace_list, list) 2165f256becSEric W. Biederman 2174665079cSPavel Emelyanov #ifdef CONFIG_NET_NS 2184665079cSPavel Emelyanov #define __net_init 2194665079cSPavel Emelyanov #define __net_exit 220022cbae6SDenis V. Lunev #define __net_initdata 2214665079cSPavel Emelyanov #else 2224665079cSPavel Emelyanov #define __net_init __init 2234665079cSPavel Emelyanov #define __net_exit __exit_refok 224022cbae6SDenis V. Lunev #define __net_initdata __initdata 2254665079cSPavel Emelyanov #endif 2265f256becSEric W. Biederman 2275f256becSEric W. Biederman struct pernet_operations { 2285f256becSEric W. Biederman struct list_head list; 2295f256becSEric W. Biederman int (*init)(struct net *net); 2305f256becSEric W. Biederman void (*exit)(struct net *net); 2315f256becSEric W. Biederman }; 2325f256becSEric W. Biederman 2335f256becSEric W. Biederman extern int register_pernet_subsys(struct pernet_operations *); 2345f256becSEric W. Biederman extern void unregister_pernet_subsys(struct pernet_operations *); 235485ac57bSAlexey Dobriyan extern int register_pernet_gen_subsys(int *id, struct pernet_operations *); 236485ac57bSAlexey Dobriyan extern void unregister_pernet_gen_subsys(int id, struct pernet_operations *); 2375f256becSEric W. Biederman extern int register_pernet_device(struct pernet_operations *); 2385f256becSEric W. Biederman extern void unregister_pernet_device(struct pernet_operations *); 239c93cf61fSPavel Emelyanov extern int register_pernet_gen_device(int *id, struct pernet_operations *); 240c93cf61fSPavel Emelyanov extern void unregister_pernet_gen_device(int id, struct pernet_operations *); 2415f256becSEric W. Biederman 24295bdfccbSEric W. Biederman struct ctl_path; 24395bdfccbSEric W. Biederman struct ctl_table; 24495bdfccbSEric W. Biederman struct ctl_table_header; 245d62c612eSPavel Emelyanov 24695bdfccbSEric W. Biederman extern struct ctl_table_header *register_net_sysctl_table(struct net *net, 24795bdfccbSEric W. Biederman const struct ctl_path *path, struct ctl_table *table); 248d62c612eSPavel Emelyanov extern struct ctl_table_header *register_net_sysctl_rotable( 249d62c612eSPavel Emelyanov const struct ctl_path *path, struct ctl_table *table); 25095bdfccbSEric W. Biederman extern void unregister_net_sysctl_table(struct ctl_table_header *header); 25195bdfccbSEric W. Biederman 2525f256becSEric W. Biederman #endif /* __NET_NET_NAMESPACE_H */ 253