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 760063497SArun Sharma #include <linux/atomic.h> 85f256becSEric W. Biederman #include <linux/workqueue.h> 95f256becSEric W. Biederman #include <linux/list.h> 10bee95250SDavid S. Miller #include <linux/sysctl.h> 115f256becSEric W. Biederman 126a662719SCong Wang #include <net/flow.h> 138efa6e93SPavel Emelyanov #include <net/netns/core.h> 14852566f5SPavel Emelyanov #include <net/netns/mib.h> 15a0a53c8bSDenis V. Lunev #include <net/netns/unix.h> 162aaef4e4SDenis V. Lunev #include <net/netns/packet.h> 178afd351cSPavel Emelyanov #include <net/netns/ipv4.h> 18b0f159dbSDaniel Lezcano #include <net/netns/ipv6.h> 19633fc86fSAlexander Aring #include <net/netns/ieee802154_6lowpan.h> 204db67e80SEric W. Biederman #include <net/netns/sctp.h> 2167019cc9SPavel Emelyanov #include <net/netns/dccp.h> 22f3c1a44aSGao feng #include <net/netns/netfilter.h> 238d870052SAlexey Dobriyan #include <net/netns/x_tables.h> 24dfdb8d79SAlexey Dobriyan #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) 25dfdb8d79SAlexey Dobriyan #include <net/netns/conntrack.h> 26dfdb8d79SAlexey Dobriyan #endif 2799633ab2SPablo Neira Ayuso #include <net/netns/nftables.h> 28d62ddc21SAlexey Dobriyan #include <net/netns/xfrm.h> 290189197fSEric W. Biederman #include <net/netns/mpls.h> 30435d5f4bSAl Viro #include <linux/ns_common.h> 3104c52decSPablo Neira Ayuso #include <linux/idr.h> 3204c52decSPablo Neira Ayuso #include <linux/skbuff.h> 33a0a53c8bSDenis V. Lunev 34038e7332SEric W. Biederman struct user_namespace; 35457c4cbcSEric W. Biederman struct proc_dir_entry; 362774c7abSEric W. Biederman struct net_device; 3797c53cacSDenis V. Lunev struct sock; 381597fbc0SPavel Emelyanov struct ctl_table_header; 39dec827d1SPavel Emelyanov struct net_generic; 40134e6375SJohannes Berg struct sock; 412553d064SJulian Anastasov struct netns_ipvs; 421597fbc0SPavel Emelyanov 437c28bd0bSEric Dumazet 447c28bd0bSEric Dumazet #define NETDEV_HASHBITS 8 457c28bd0bSEric Dumazet #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS) 467c28bd0bSEric Dumazet 475f256becSEric W. Biederman struct net { 48a685e089SAl Viro atomic_t passive; /* To decided when the network 495f256becSEric W. Biederman * namespace should be freed. 505f256becSEric W. Biederman */ 51a685e089SAl Viro atomic_t count; /* To decided when the network 52a685e089SAl Viro * namespace should be shut down. 53a685e089SAl Viro */ 548e602ce2SEric Dumazet spinlock_t rules_mod_lock; 558e602ce2SEric Dumazet 5633cf7c90SEric Dumazet atomic64_t cookie_gen; 5733cf7c90SEric Dumazet 585f256becSEric W. Biederman struct list_head list; /* list of network namespaces */ 592b035b39SEric W. Biederman struct list_head cleanup_list; /* namespaces on death row */ 6072ad937aSEric W. Biederman struct list_head exit_list; /* Use only net_mutex */ 61457c4cbcSEric W. Biederman 62038e7332SEric W. Biederman struct user_namespace *user_ns; /* Owning user namespace */ 63de133464SWANG Cong spinlock_t nsid_lock; 640c7aecd4SNicolas Dichtel struct idr netns_ids; 65038e7332SEric W. Biederman 66435d5f4bSAl Viro struct ns_common ns; 6798f842e6SEric W. Biederman 68457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net; 69457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net_stat; 70881d966bSEric W. Biederman 7173455092SAl Viro #ifdef CONFIG_SYSCTL 7273455092SAl Viro struct ctl_table_set sysctls; 7373455092SAl Viro #endif 7495bdfccbSEric W. Biederman 758e602ce2SEric Dumazet struct sock *rtnl; /* rtnetlink socket */ 768e602ce2SEric Dumazet struct sock *genl_sock; 772774c7abSEric W. Biederman 78881d966bSEric W. Biederman struct list_head dev_base_head; 79881d966bSEric W. Biederman struct hlist_head *dev_name_head; 80881d966bSEric W. Biederman struct hlist_head *dev_index_head; 814e985adaSThomas Graf unsigned int dev_base_seq; /* protected by rtnl_mutex */ 82aa79e66eSPavel Emelyanov int ifindex; 8350624c93SEric W. Biederman unsigned int dev_unreg_count; 8497c53cacSDenis V. Lunev 855fd30ee7SDenis V. Lunev /* core fib_rules */ 865fd30ee7SDenis V. Lunev struct list_head rules_ops; 875fd30ee7SDenis V. Lunev 88d12d01d6SDenis V. Lunev 898e602ce2SEric Dumazet struct net_device *loopback_dev; /* The loopback */ 908efa6e93SPavel Emelyanov struct netns_core core; 91852566f5SPavel Emelyanov struct netns_mib mib; 922aaef4e4SDenis V. Lunev struct netns_packet packet; 93a0a53c8bSDenis V. Lunev struct netns_unix unx; 948afd351cSPavel Emelyanov struct netns_ipv4 ipv4; 95dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 96b0f159dbSDaniel Lezcano struct netns_ipv6 ipv6; 97b0f159dbSDaniel Lezcano #endif 98633fc86fSAlexander Aring #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) 99633fc86fSAlexander Aring struct netns_ieee802154_lowpan ieee802154_lowpan; 100633fc86fSAlexander Aring #endif 1014db67e80SEric W. Biederman #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE) 1024db67e80SEric W. Biederman struct netns_sctp sctp; 1034db67e80SEric W. Biederman #endif 10467019cc9SPavel Emelyanov #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) 10567019cc9SPavel Emelyanov struct netns_dccp dccp; 10667019cc9SPavel Emelyanov #endif 1078d870052SAlexey Dobriyan #ifdef CONFIG_NETFILTER 108f3c1a44aSGao feng struct netns_nf nf; 1098d870052SAlexey Dobriyan struct netns_xt xt; 110dfdb8d79SAlexey Dobriyan #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) 111dfdb8d79SAlexey Dobriyan struct netns_ct ct; 112dfdb8d79SAlexey Dobriyan #endif 11399633ab2SPablo Neira Ayuso #if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE) 11499633ab2SPablo Neira Ayuso struct netns_nftables nft; 11599633ab2SPablo Neira Ayuso #endif 116c038a767SAmerigo Wang #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) 117c038a767SAmerigo Wang struct netns_nf_frag nf_frag; 118c038a767SAmerigo Wang #endif 119cd8c20b6SAlexey Dobriyan struct sock *nfnl; 120cd8c20b6SAlexey Dobriyan struct sock *nfnl_stash; 1213499abb2SAndreas Schultz #if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT) 1223499abb2SAndreas Schultz struct list_head nfnl_acct_list; 1233499abb2SAndreas Schultz #endif 12419576c94SPablo Neira #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) 12519576c94SPablo Neira struct list_head nfct_timeout_list; 12619576c94SPablo Neira #endif 1278d870052SAlexey Dobriyan #endif 1283d23e349SJohannes Berg #ifdef CONFIG_WEXT_CORE 129b333b3d2SJohannes Berg struct sk_buff_head wext_nlevents; 130b333b3d2SJohannes Berg #endif 1311c87733dSEric Dumazet struct net_generic __rcu *gen; 1328e602ce2SEric Dumazet 1338e602ce2SEric Dumazet /* Note : following structs are cache line aligned */ 1348e602ce2SEric Dumazet #ifdef CONFIG_XFRM 1358e602ce2SEric Dumazet struct netns_xfrm xfrm; 1368e602ce2SEric Dumazet #endif 1378b4d14d8SJunweiZhang #if IS_ENABLED(CONFIG_IP_VS) 13861b1ab45SHans Schillstrom struct netns_ipvs *ipvs; 1398b4d14d8SJunweiZhang #endif 1400189197fSEric W. Biederman #if IS_ENABLED(CONFIG_MPLS) 1410189197fSEric W. Biederman struct netns_mpls mpls; 1420189197fSEric W. Biederman #endif 14351d7cccfSAndrey Vagin struct sock *diag_nlsk; 1445aad1de5STimo Teräs atomic_t fnhe_genid; 1455f256becSEric W. Biederman }; 1465f256becSEric W. Biederman 147c0f39322SDenis V. Lunev #include <linux/seq_file_net.h> 148c0f39322SDenis V. Lunev 1494fabcd71SDaniel Lezcano /* Init's network namespace */ 1505f256becSEric W. Biederman extern struct net init_net; 151a4aa834aSDenis V. Lunev 152d727abcbSEric W. Biederman #ifdef CONFIG_NET_NS 153e67e16eaSJoe Perches struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns, 154e67e16eaSJoe Perches struct net *old_net); 155225c0a01SDenis V. Lunev 156d727abcbSEric W. Biederman #else /* CONFIG_NET_NS */ 157d727abcbSEric W. Biederman #include <linux/sched.h> 158d727abcbSEric W. Biederman #include <linux/nsproxy.h> 159038e7332SEric W. Biederman static inline struct net *copy_net_ns(unsigned long flags, 160038e7332SEric W. Biederman struct user_namespace *user_ns, struct net *old_net) 1619dd776b6SEric W. Biederman { 162d727abcbSEric W. Biederman if (flags & CLONE_NEWNET) 163d727abcbSEric W. Biederman return ERR_PTR(-EINVAL); 164d727abcbSEric W. Biederman return old_net; 1659dd776b6SEric W. Biederman } 166d727abcbSEric W. Biederman #endif /* CONFIG_NET_NS */ 167225c0a01SDenis V. Lunev 168225c0a01SDenis V. Lunev 169225c0a01SDenis V. Lunev extern struct list_head net_namespace_list; 1709dd776b6SEric W. Biederman 171e67e16eaSJoe Perches struct net *get_net_ns_by_pid(pid_t pid); 172e67e16eaSJoe Perches struct net *get_net_ns_by_fd(int pid); 17330ffee84SJohannes Berg 174535d3ae9SRashika Kheria #ifdef CONFIG_SYSCTL 175535d3ae9SRashika Kheria void ipx_register_sysctl(void); 176535d3ae9SRashika Kheria void ipx_unregister_sysctl(void); 177535d3ae9SRashika Kheria #else 178535d3ae9SRashika Kheria #define ipx_register_sysctl() 179535d3ae9SRashika Kheria #define ipx_unregister_sysctl() 180535d3ae9SRashika Kheria #endif 181535d3ae9SRashika Kheria 182d4655795SPavel Emelyanov #ifdef CONFIG_NET_NS 183e67e16eaSJoe Perches void __put_net(struct net *net); 1845f256becSEric W. Biederman 1855f256becSEric W. Biederman static inline struct net *get_net(struct net *net) 1865f256becSEric W. Biederman { 1875f256becSEric W. Biederman atomic_inc(&net->count); 1885f256becSEric W. Biederman return net; 1895f256becSEric W. Biederman } 1905f256becSEric W. Biederman 191077130c0SEric W. Biederman static inline struct net *maybe_get_net(struct net *net) 192077130c0SEric W. Biederman { 193077130c0SEric W. Biederman /* Used when we know struct net exists but we 194077130c0SEric W. Biederman * aren't guaranteed a previous reference count 195077130c0SEric W. Biederman * exists. If the reference count is zero this 196077130c0SEric W. Biederman * function fails and returns NULL. 197077130c0SEric W. Biederman */ 198077130c0SEric W. Biederman if (!atomic_inc_not_zero(&net->count)) 199077130c0SEric W. Biederman net = NULL; 200077130c0SEric W. Biederman return net; 201077130c0SEric W. Biederman } 202077130c0SEric W. Biederman 2035f256becSEric W. Biederman static inline void put_net(struct net *net) 2045f256becSEric W. Biederman { 2055f256becSEric W. Biederman if (atomic_dec_and_test(&net->count)) 2065f256becSEric W. Biederman __put_net(net); 2075f256becSEric W. Biederman } 2085f256becSEric W. Biederman 209878628fbSYOSHIFUJI Hideaki static inline 210878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 211878628fbSYOSHIFUJI Hideaki { 212878628fbSYOSHIFUJI Hideaki return net1 == net2; 213878628fbSYOSHIFUJI Hideaki } 214a685e089SAl Viro 215e67e16eaSJoe Perches void net_drop_ns(void *); 216a685e089SAl Viro 217d4655795SPavel Emelyanov #else 218b9f75f45SEric W. Biederman 219d4655795SPavel Emelyanov static inline struct net *get_net(struct net *net) 220d4655795SPavel Emelyanov { 221d4655795SPavel Emelyanov return net; 222d4655795SPavel Emelyanov } 223d4655795SPavel Emelyanov 224d4655795SPavel Emelyanov static inline void put_net(struct net *net) 225d4655795SPavel Emelyanov { 226d4655795SPavel Emelyanov } 227d4655795SPavel Emelyanov 228d4655795SPavel Emelyanov static inline struct net *maybe_get_net(struct net *net) 229d4655795SPavel Emelyanov { 230d4655795SPavel Emelyanov return net; 231d4655795SPavel Emelyanov } 232878628fbSYOSHIFUJI Hideaki 233878628fbSYOSHIFUJI Hideaki static inline 234878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 235878628fbSYOSHIFUJI Hideaki { 236878628fbSYOSHIFUJI Hideaki return 1; 237878628fbSYOSHIFUJI Hideaki } 238a685e089SAl Viro 239a685e089SAl Viro #define net_drop_ns NULL 240d4655795SPavel Emelyanov #endif 2415f256becSEric W. Biederman 2425d1e4468SDenis V. Lunev 2430c5c9fb5SEric W. Biederman typedef struct { 2448f424b5fSEric Dumazet #ifdef CONFIG_NET_NS 2450c5c9fb5SEric W. Biederman struct net *net; 2468f424b5fSEric Dumazet #endif 2470c5c9fb5SEric W. Biederman } possible_net_t; 2480c5c9fb5SEric W. Biederman 2490c5c9fb5SEric W. Biederman static inline void write_pnet(possible_net_t *pnet, struct net *net) 2500c5c9fb5SEric W. Biederman { 2510c5c9fb5SEric W. Biederman #ifdef CONFIG_NET_NS 2520c5c9fb5SEric W. Biederman pnet->net = net; 2530c5c9fb5SEric W. Biederman #endif 2540c5c9fb5SEric W. Biederman } 2550c5c9fb5SEric W. Biederman 2560c5c9fb5SEric W. Biederman static inline struct net *read_pnet(const possible_net_t *pnet) 2570c5c9fb5SEric W. Biederman { 2580c5c9fb5SEric W. Biederman #ifdef CONFIG_NET_NS 2590c5c9fb5SEric W. Biederman return pnet->net; 2600c5c9fb5SEric W. Biederman #else 2610c5c9fb5SEric W. Biederman return &init_net; 2620c5c9fb5SEric W. Biederman #endif 2630c5c9fb5SEric W. Biederman } 2645d1e4468SDenis V. Lunev 2655f256becSEric W. Biederman #define for_each_net(VAR) \ 2665f256becSEric W. Biederman list_for_each_entry(VAR, &net_namespace_list, list) 2675f256becSEric W. Biederman 26811a28d37SJohannes Berg #define for_each_net_rcu(VAR) \ 26911a28d37SJohannes Berg list_for_each_entry_rcu(VAR, &net_namespace_list, list) 27011a28d37SJohannes Berg 2714665079cSPavel Emelyanov #ifdef CONFIG_NET_NS 2724665079cSPavel Emelyanov #define __net_init 2734665079cSPavel Emelyanov #define __net_exit 274022cbae6SDenis V. Lunev #define __net_initdata 27504a6f82cSAndi Kleen #define __net_initconst 2764665079cSPavel Emelyanov #else 2774665079cSPavel Emelyanov #define __net_init __init 278bd721ea7SFabian Frederick #define __net_exit __ref 279022cbae6SDenis V. Lunev #define __net_initdata __initdata 28004a6f82cSAndi Kleen #define __net_initconst __initconst 2814665079cSPavel Emelyanov #endif 2825f256becSEric W. Biederman 2837a0877d4SNicolas Dichtel int peernet2id_alloc(struct net *net, struct net *peer); 28459324cf3SNicolas Dichtel int peernet2id(struct net *net, struct net *peer); 28559324cf3SNicolas Dichtel bool peernet_has_id(struct net *net, struct net *peer); 2860c7aecd4SNicolas Dichtel struct net *get_net_ns_by_id(struct net *net, int id); 2870c7aecd4SNicolas Dichtel 2885f256becSEric W. Biederman struct pernet_operations { 2895f256becSEric W. Biederman struct list_head list; 2905f256becSEric W. Biederman int (*init)(struct net *net); 2915f256becSEric W. Biederman void (*exit)(struct net *net); 29272ad937aSEric W. Biederman void (*exit_batch)(struct list_head *net_exit_list); 293f875bae0SEric W. Biederman int *id; 294f875bae0SEric W. Biederman size_t size; 2955f256becSEric W. Biederman }; 2965f256becSEric W. Biederman 29717edde52SEric W. Biederman /* 29817edde52SEric W. Biederman * Use these carefully. If you implement a network device and it 29917edde52SEric W. Biederman * needs per network namespace operations use device pernet operations, 30017edde52SEric W. Biederman * otherwise use pernet subsys operations. 30117edde52SEric W. Biederman * 3024edf547bSJohannes Berg * Network interfaces need to be removed from a dying netns _before_ 3034edf547bSJohannes Berg * subsys notifiers can be called, as most of the network code cleanup 3044edf547bSJohannes Berg * (which is done from subsys notifiers) runs with the assumption that 3054edf547bSJohannes Berg * dev_remove_pack has been called so no new packets will arrive during 3064edf547bSJohannes Berg * and after the cleanup functions have been called. dev_remove_pack 3074edf547bSJohannes Berg * is not per namespace so instead the guarantee of no more packets 3084edf547bSJohannes Berg * arriving in a network namespace is provided by ensuring that all 3094edf547bSJohannes Berg * network devices and all sockets have left the network namespace 3104edf547bSJohannes Berg * before the cleanup methods are called. 31117edde52SEric W. Biederman * 31217edde52SEric W. Biederman * For the longest time the ipv4 icmp code was registered as a pernet 31317edde52SEric W. Biederman * device which caused kernel oops, and panics during network 31417edde52SEric W. Biederman * namespace cleanup. So please don't get this wrong. 31517edde52SEric W. Biederman */ 316e67e16eaSJoe Perches int register_pernet_subsys(struct pernet_operations *); 317e67e16eaSJoe Perches void unregister_pernet_subsys(struct pernet_operations *); 318e67e16eaSJoe Perches int register_pernet_device(struct pernet_operations *); 319e67e16eaSJoe Perches void unregister_pernet_device(struct pernet_operations *); 320f875bae0SEric W. Biederman 32195bdfccbSEric W. Biederman struct ctl_table; 32295bdfccbSEric W. Biederman struct ctl_table_header; 323d62c612eSPavel Emelyanov 3242ca794e5SEric W. Biederman #ifdef CONFIG_SYSCTL 325e67e16eaSJoe Perches int net_sysctl_init(void); 326e67e16eaSJoe Perches struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, 327e67e16eaSJoe Perches struct ctl_table *table); 328e67e16eaSJoe Perches void unregister_net_sysctl_table(struct ctl_table_header *header); 32948c74958SEric W. Biederman #else 33048c74958SEric W. Biederman static inline int net_sysctl_init(void) { return 0; } 33148c74958SEric W. Biederman static inline struct ctl_table_header *register_net_sysctl(struct net *net, 33248c74958SEric W. Biederman const char *path, struct ctl_table *table) 33348c74958SEric W. Biederman { 33448c74958SEric W. Biederman return NULL; 33548c74958SEric W. Biederman } 33648c74958SEric W. Biederman static inline void unregister_net_sysctl_table(struct ctl_table_header *header) 33748c74958SEric W. Biederman { 33848c74958SEric W. Biederman } 33948c74958SEric W. Biederman #endif 34048c74958SEric W. Biederman 341ca4c3fc2Sfan.du static inline int rt_genid_ipv4(struct net *net) 342b42664f8SNicolas Dichtel { 343ca4c3fc2Sfan.du return atomic_read(&net->ipv4.rt_genid); 344b42664f8SNicolas Dichtel } 345b42664f8SNicolas Dichtel 346ca4c3fc2Sfan.du static inline void rt_genid_bump_ipv4(struct net *net) 347b42664f8SNicolas Dichtel { 348ca4c3fc2Sfan.du atomic_inc(&net->ipv4.rt_genid); 349ca4c3fc2Sfan.du } 350ca4c3fc2Sfan.du 351705f1c86SHannes Frederic Sowa extern void (*__fib6_flush_trees)(struct net *net); 352ca4c3fc2Sfan.du static inline void rt_genid_bump_ipv6(struct net *net) 353ca4c3fc2Sfan.du { 354705f1c86SHannes Frederic Sowa if (__fib6_flush_trees) 355705f1c86SHannes Frederic Sowa __fib6_flush_trees(net); 356ca4c3fc2Sfan.du } 357ca4c3fc2Sfan.du 358599018a7SLuis R. Rodriguez #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) 359599018a7SLuis R. Rodriguez static inline struct netns_ieee802154_lowpan * 360599018a7SLuis R. Rodriguez net_ieee802154_lowpan(struct net *net) 361599018a7SLuis R. Rodriguez { 362599018a7SLuis R. Rodriguez return &net->ieee802154_lowpan; 363599018a7SLuis R. Rodriguez } 364599018a7SLuis R. Rodriguez #endif 365599018a7SLuis R. Rodriguez 366ca4c3fc2Sfan.du /* For callers who don't really care about whether it's IPv4 or IPv6 */ 367ca4c3fc2Sfan.du static inline void rt_genid_bump_all(struct net *net) 368ca4c3fc2Sfan.du { 369ca4c3fc2Sfan.du rt_genid_bump_ipv4(net); 370ca4c3fc2Sfan.du rt_genid_bump_ipv6(net); 371b42664f8SNicolas Dichtel } 37295bdfccbSEric W. Biederman 3735aad1de5STimo Teräs static inline int fnhe_genid(struct net *net) 3745aad1de5STimo Teräs { 3755aad1de5STimo Teräs return atomic_read(&net->fnhe_genid); 3765aad1de5STimo Teräs } 3775aad1de5STimo Teräs 3785aad1de5STimo Teräs static inline void fnhe_genid_bump(struct net *net) 3795aad1de5STimo Teräs { 3805aad1de5STimo Teräs atomic_inc(&net->fnhe_genid); 3815aad1de5STimo Teräs } 3825aad1de5STimo Teräs 3835f256becSEric W. Biederman #endif /* __NET_NET_NAMESPACE_H */ 384