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> 12a0a53c8bSDenis V. Lunev #include <net/netns/unix.h> 132aaef4e4SDenis V. Lunev #include <net/netns/packet.h> 148afd351cSPavel Emelyanov #include <net/netns/ipv4.h> 15b0f159dbSDaniel Lezcano #include <net/netns/ipv6.h> 1667019cc9SPavel Emelyanov #include <net/netns/dccp.h> 178d870052SAlexey Dobriyan #include <net/netns/x_tables.h> 18a0a53c8bSDenis V. Lunev 19457c4cbcSEric W. Biederman struct proc_dir_entry; 202774c7abSEric W. Biederman struct net_device; 2197c53cacSDenis V. Lunev struct sock; 221597fbc0SPavel Emelyanov struct ctl_table_header; 231597fbc0SPavel Emelyanov 245f256becSEric W. Biederman struct net { 255f256becSEric W. Biederman atomic_t count; /* To decided when the network 265f256becSEric W. Biederman * namespace should be freed. 275f256becSEric W. Biederman */ 285f256becSEric W. Biederman atomic_t use_count; /* To track references we 295f256becSEric W. Biederman * destroy on demand 305f256becSEric W. Biederman */ 315f256becSEric W. Biederman struct list_head list; /* list of network namespaces */ 325f256becSEric W. Biederman struct work_struct work; /* work struct for freeing */ 33457c4cbcSEric W. Biederman 34457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net; 35457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net_stat; 36881d966bSEric W. Biederman 3795bdfccbSEric W. Biederman struct list_head sysctl_table_headers; 3895bdfccbSEric W. Biederman 392774c7abSEric W. Biederman struct net_device *loopback_dev; /* The loopback */ 402774c7abSEric W. Biederman 41881d966bSEric W. Biederman struct list_head dev_base_head; 42881d966bSEric W. Biederman struct hlist_head *dev_name_head; 43881d966bSEric W. Biederman struct hlist_head *dev_index_head; 4497c53cacSDenis V. Lunev 455fd30ee7SDenis V. Lunev /* core fib_rules */ 465fd30ee7SDenis V. Lunev struct list_head rules_ops; 475fd30ee7SDenis V. Lunev spinlock_t rules_mod_lock; 485fd30ee7SDenis V. Lunev 4997c53cacSDenis V. Lunev struct sock *rtnl; /* rtnetlink socket */ 50d12d01d6SDenis V. Lunev 518efa6e93SPavel Emelyanov struct netns_core core; 522aaef4e4SDenis V. Lunev struct netns_packet packet; 53a0a53c8bSDenis V. Lunev struct netns_unix unx; 548afd351cSPavel Emelyanov struct netns_ipv4 ipv4; 55b0f159dbSDaniel Lezcano #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 56b0f159dbSDaniel Lezcano struct netns_ipv6 ipv6; 57b0f159dbSDaniel Lezcano #endif 5867019cc9SPavel Emelyanov #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) 5967019cc9SPavel Emelyanov struct netns_dccp dccp; 6067019cc9SPavel Emelyanov #endif 618d870052SAlexey Dobriyan #ifdef CONFIG_NETFILTER 628d870052SAlexey Dobriyan struct netns_xt xt; 638d870052SAlexey Dobriyan #endif 645f256becSEric W. Biederman }; 655f256becSEric W. Biederman 66225c0a01SDenis V. Lunev 67c0f39322SDenis V. Lunev #include <linux/seq_file_net.h> 68c0f39322SDenis V. Lunev 694fabcd71SDaniel Lezcano /* Init's network namespace */ 705f256becSEric W. Biederman extern struct net init_net; 71a4aa834aSDenis V. Lunev 72a4aa834aSDenis V. Lunev #ifdef CONFIG_NET 734fabcd71SDaniel Lezcano #define INIT_NET_NS(net_ns) .net_ns = &init_net, 744fabcd71SDaniel Lezcano 759dd776b6SEric W. Biederman extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); 76225c0a01SDenis V. Lunev 77225c0a01SDenis V. Lunev #else /* CONFIG_NET */ 78225c0a01SDenis V. Lunev 79225c0a01SDenis V. Lunev #define INIT_NET_NS(net_ns) 80225c0a01SDenis V. Lunev 819dd776b6SEric W. Biederman static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) 829dd776b6SEric W. Biederman { 839dd776b6SEric W. Biederman /* There is nothing to copy so this is a noop */ 849dd776b6SEric W. Biederman return net_ns; 859dd776b6SEric W. Biederman } 86225c0a01SDenis V. Lunev #endif /* CONFIG_NET */ 87225c0a01SDenis V. Lunev 88225c0a01SDenis V. Lunev 89225c0a01SDenis V. Lunev extern struct list_head net_namespace_list; 909dd776b6SEric W. Biederman 91d4655795SPavel Emelyanov #ifdef CONFIG_NET_NS 925f256becSEric W. Biederman extern void __put_net(struct net *net); 935f256becSEric W. Biederman 945f256becSEric W. Biederman static inline struct net *get_net(struct net *net) 955f256becSEric W. Biederman { 965f256becSEric W. Biederman atomic_inc(&net->count); 975f256becSEric W. Biederman return net; 985f256becSEric W. Biederman } 995f256becSEric W. Biederman 100077130c0SEric W. Biederman static inline struct net *maybe_get_net(struct net *net) 101077130c0SEric W. Biederman { 102077130c0SEric W. Biederman /* Used when we know struct net exists but we 103077130c0SEric W. Biederman * aren't guaranteed a previous reference count 104077130c0SEric W. Biederman * exists. If the reference count is zero this 105077130c0SEric W. Biederman * function fails and returns NULL. 106077130c0SEric W. Biederman */ 107077130c0SEric W. Biederman if (!atomic_inc_not_zero(&net->count)) 108077130c0SEric W. Biederman net = NULL; 109077130c0SEric W. Biederman return net; 110077130c0SEric W. Biederman } 111077130c0SEric W. Biederman 1125f256becSEric W. Biederman static inline void put_net(struct net *net) 1135f256becSEric W. Biederman { 1145f256becSEric W. Biederman if (atomic_dec_and_test(&net->count)) 1155f256becSEric W. Biederman __put_net(net); 1165f256becSEric W. Biederman } 1175f256becSEric W. Biederman 1185f256becSEric W. Biederman static inline struct net *hold_net(struct net *net) 1195f256becSEric W. Biederman { 1205f256becSEric W. Biederman atomic_inc(&net->use_count); 1215f256becSEric W. Biederman return net; 1225f256becSEric W. Biederman } 1235f256becSEric W. Biederman 1245f256becSEric W. Biederman static inline void release_net(struct net *net) 1255f256becSEric W. Biederman { 1265f256becSEric W. Biederman atomic_dec(&net->use_count); 1275f256becSEric W. Biederman } 128878628fbSYOSHIFUJI Hideaki 129878628fbSYOSHIFUJI Hideaki static inline 130878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 131878628fbSYOSHIFUJI Hideaki { 132878628fbSYOSHIFUJI Hideaki return net1 == net2; 133878628fbSYOSHIFUJI Hideaki } 134d4655795SPavel Emelyanov #else 135d4655795SPavel Emelyanov static inline struct net *get_net(struct net *net) 136d4655795SPavel Emelyanov { 137d4655795SPavel Emelyanov return net; 138d4655795SPavel Emelyanov } 139d4655795SPavel Emelyanov 140d4655795SPavel Emelyanov static inline void put_net(struct net *net) 141d4655795SPavel Emelyanov { 142d4655795SPavel Emelyanov } 143d4655795SPavel Emelyanov 144d4655795SPavel Emelyanov static inline struct net *hold_net(struct net *net) 145d4655795SPavel Emelyanov { 146d4655795SPavel Emelyanov return net; 147d4655795SPavel Emelyanov } 148d4655795SPavel Emelyanov 149d4655795SPavel Emelyanov static inline void release_net(struct net *net) 150d4655795SPavel Emelyanov { 151d4655795SPavel Emelyanov } 152d4655795SPavel Emelyanov 153d4655795SPavel Emelyanov static inline struct net *maybe_get_net(struct net *net) 154d4655795SPavel Emelyanov { 155d4655795SPavel Emelyanov return net; 156d4655795SPavel Emelyanov } 157878628fbSYOSHIFUJI Hideaki 158878628fbSYOSHIFUJI Hideaki static inline 159878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 160878628fbSYOSHIFUJI Hideaki { 161878628fbSYOSHIFUJI Hideaki return 1; 162878628fbSYOSHIFUJI Hideaki } 163d4655795SPavel Emelyanov #endif 1645f256becSEric W. Biederman 1655f256becSEric W. Biederman #define for_each_net(VAR) \ 1665f256becSEric W. Biederman list_for_each_entry(VAR, &net_namespace_list, list) 1675f256becSEric W. Biederman 1684665079cSPavel Emelyanov #ifdef CONFIG_NET_NS 1694665079cSPavel Emelyanov #define __net_init 1704665079cSPavel Emelyanov #define __net_exit 171022cbae6SDenis V. Lunev #define __net_initdata 1724665079cSPavel Emelyanov #else 1734665079cSPavel Emelyanov #define __net_init __init 1744665079cSPavel Emelyanov #define __net_exit __exit_refok 175022cbae6SDenis V. Lunev #define __net_initdata __initdata 1764665079cSPavel Emelyanov #endif 1775f256becSEric W. Biederman 1785f256becSEric W. Biederman struct pernet_operations { 1795f256becSEric W. Biederman struct list_head list; 1805f256becSEric W. Biederman int (*init)(struct net *net); 1815f256becSEric W. Biederman void (*exit)(struct net *net); 1825f256becSEric W. Biederman }; 1835f256becSEric W. Biederman 1845f256becSEric W. Biederman extern int register_pernet_subsys(struct pernet_operations *); 1855f256becSEric W. Biederman extern void unregister_pernet_subsys(struct pernet_operations *); 1865f256becSEric W. Biederman extern int register_pernet_device(struct pernet_operations *); 1875f256becSEric W. Biederman extern void unregister_pernet_device(struct pernet_operations *); 1885f256becSEric W. Biederman 18995bdfccbSEric W. Biederman struct ctl_path; 19095bdfccbSEric W. Biederman struct ctl_table; 19195bdfccbSEric W. Biederman struct ctl_table_header; 19295bdfccbSEric W. Biederman extern struct ctl_table_header *register_net_sysctl_table(struct net *net, 19395bdfccbSEric W. Biederman const struct ctl_path *path, struct ctl_table *table); 19495bdfccbSEric W. Biederman extern void unregister_net_sysctl_table(struct ctl_table_header *header); 19595bdfccbSEric W. Biederman 1965f256becSEric W. Biederman #endif /* __NET_NET_NAMESPACE_H */ 197