1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 25f256becSEric W. Biederman /* 35f256becSEric W. Biederman * Operations on the network namespace 45f256becSEric W. Biederman */ 55f256becSEric W. Biederman #ifndef __NET_NET_NAMESPACE_H 65f256becSEric W. Biederman #define __NET_NET_NAMESPACE_H 75f256becSEric W. Biederman 860063497SArun Sharma #include <linux/atomic.h> 9c122e14dSReshetova, Elena #include <linux/refcount.h> 105f256becSEric W. Biederman #include <linux/workqueue.h> 115f256becSEric W. Biederman #include <linux/list.h> 12bee95250SDavid S. Miller #include <linux/sysctl.h> 13fbdeaed4STyler Hicks #include <linux/uidgid.h> 145f256becSEric W. Biederman 156a662719SCong Wang #include <net/flow.h> 168efa6e93SPavel Emelyanov #include <net/netns/core.h> 17852566f5SPavel Emelyanov #include <net/netns/mib.h> 18a0a53c8bSDenis V. Lunev #include <net/netns/unix.h> 192aaef4e4SDenis V. Lunev #include <net/netns/packet.h> 208afd351cSPavel Emelyanov #include <net/netns/ipv4.h> 21b0f159dbSDaniel Lezcano #include <net/netns/ipv6.h> 22633fc86fSAlexander Aring #include <net/netns/ieee802154_6lowpan.h> 234db67e80SEric W. Biederman #include <net/netns/sctp.h> 2467019cc9SPavel Emelyanov #include <net/netns/dccp.h> 25f3c1a44aSGao feng #include <net/netns/netfilter.h> 268d870052SAlexey Dobriyan #include <net/netns/x_tables.h> 27dfdb8d79SAlexey Dobriyan #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) 28dfdb8d79SAlexey Dobriyan #include <net/netns/conntrack.h> 29dfdb8d79SAlexey Dobriyan #endif 3099633ab2SPablo Neira Ayuso #include <net/netns/nftables.h> 31d62ddc21SAlexey Dobriyan #include <net/netns/xfrm.h> 320189197fSEric W. Biederman #include <net/netns/mpls.h> 338e8cda6dSMario Kicherer #include <net/netns/can.h> 341d0dc069SBjörn Töpel #include <net/netns/xdp.h> 35435d5f4bSAl Viro #include <linux/ns_common.h> 3604c52decSPablo Neira Ayuso #include <linux/idr.h> 3704c52decSPablo Neira Ayuso #include <linux/skbuff.h> 38a0a53c8bSDenis V. Lunev 39038e7332SEric W. Biederman struct user_namespace; 40457c4cbcSEric W. Biederman struct proc_dir_entry; 412774c7abSEric W. Biederman struct net_device; 4297c53cacSDenis V. Lunev struct sock; 431597fbc0SPavel Emelyanov struct ctl_table_header; 44dec827d1SPavel Emelyanov struct net_generic; 4594e5e308SChristian Brauner struct uevent_sock; 462553d064SJulian Anastasov struct netns_ipvs; 47d58e468bSPetar Penkov struct bpf_prog; 481597fbc0SPavel Emelyanov 497c28bd0bSEric Dumazet 507c28bd0bSEric Dumazet #define NETDEV_HASHBITS 8 517c28bd0bSEric Dumazet #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS) 527c28bd0bSEric Dumazet 535f256becSEric W. Biederman struct net { 54c122e14dSReshetova, Elena refcount_t passive; /* To decided when the network 555f256becSEric W. Biederman * namespace should be freed. 565f256becSEric W. Biederman */ 57273c28bcSKirill Tkhai refcount_t count; /* To decided when the network 58a685e089SAl Viro * namespace should be shut down. 59a685e089SAl Viro */ 608e602ce2SEric Dumazet spinlock_t rules_mod_lock; 618e602ce2SEric Dumazet 6233cf7c90SEric Dumazet atomic64_t cookie_gen; 6333cf7c90SEric Dumazet 645f256becSEric W. Biederman struct list_head list; /* list of network namespaces */ 6519efbd93SKirill Tkhai struct list_head exit_list; /* To linked to call pernet exit 664420bf21SKirill Tkhai * methods on dead net ( 674420bf21SKirill Tkhai * pernet_ops_rwsem read locked), 684420bf21SKirill Tkhai * or to unregister pernet ops 694420bf21SKirill Tkhai * (pernet_ops_rwsem write locked). 7019efbd93SKirill Tkhai */ 7165b7b5b9SKirill Tkhai struct llist_node cleanup_list; /* namespaces on death row */ 7265b7b5b9SKirill Tkhai 73038e7332SEric W. Biederman struct user_namespace *user_ns; /* Owning user namespace */ 7470328660SEric W. Biederman struct ucounts *ucounts; 75de133464SWANG Cong spinlock_t nsid_lock; 760c7aecd4SNicolas Dichtel struct idr netns_ids; 77038e7332SEric W. Biederman 78435d5f4bSAl Viro struct ns_common ns; 7998f842e6SEric W. Biederman 80457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net; 81457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net_stat; 82881d966bSEric W. Biederman 8373455092SAl Viro #ifdef CONFIG_SYSCTL 8473455092SAl Viro struct ctl_table_set sysctls; 8573455092SAl Viro #endif 8695bdfccbSEric W. Biederman 878e602ce2SEric Dumazet struct sock *rtnl; /* rtnetlink socket */ 888e602ce2SEric Dumazet struct sock *genl_sock; 892774c7abSEric W. Biederman 9094e5e308SChristian Brauner struct uevent_sock *uevent_sock; /* uevent socket */ 9194e5e308SChristian Brauner 92881d966bSEric W. Biederman struct list_head dev_base_head; 93881d966bSEric W. Biederman struct hlist_head *dev_name_head; 94881d966bSEric W. Biederman struct hlist_head *dev_index_head; 954e985adaSThomas Graf unsigned int dev_base_seq; /* protected by rtnl_mutex */ 96aa79e66eSPavel Emelyanov int ifindex; 9750624c93SEric W. Biederman unsigned int dev_unreg_count; 9897c53cacSDenis V. Lunev 995fd30ee7SDenis V. Lunev /* core fib_rules */ 1005fd30ee7SDenis V. Lunev struct list_head rules_ops; 1015fd30ee7SDenis V. Lunev 1024420bf21SKirill Tkhai struct list_head fib_notifier_ops; /* Populated by 1034420bf21SKirill Tkhai * register_pernet_subsys() 1044420bf21SKirill Tkhai */ 1058e602ce2SEric Dumazet struct net_device *loopback_dev; /* The loopback */ 1068efa6e93SPavel Emelyanov struct netns_core core; 107852566f5SPavel Emelyanov struct netns_mib mib; 1082aaef4e4SDenis V. Lunev struct netns_packet packet; 109a0a53c8bSDenis V. Lunev struct netns_unix unx; 1108afd351cSPavel Emelyanov struct netns_ipv4 ipv4; 111dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 112b0f159dbSDaniel Lezcano struct netns_ipv6 ipv6; 113b0f159dbSDaniel Lezcano #endif 114633fc86fSAlexander Aring #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) 115633fc86fSAlexander Aring struct netns_ieee802154_lowpan ieee802154_lowpan; 116633fc86fSAlexander Aring #endif 1174db67e80SEric W. Biederman #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE) 1184db67e80SEric W. Biederman struct netns_sctp sctp; 1194db67e80SEric W. Biederman #endif 12067019cc9SPavel Emelyanov #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) 12167019cc9SPavel Emelyanov struct netns_dccp dccp; 12267019cc9SPavel Emelyanov #endif 1238d870052SAlexey Dobriyan #ifdef CONFIG_NETFILTER 124f3c1a44aSGao feng struct netns_nf nf; 1258d870052SAlexey Dobriyan struct netns_xt xt; 126dfdb8d79SAlexey Dobriyan #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) 127dfdb8d79SAlexey Dobriyan struct netns_ct ct; 128dfdb8d79SAlexey Dobriyan #endif 12999633ab2SPablo Neira Ayuso #if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE) 13099633ab2SPablo Neira Ayuso struct netns_nftables nft; 13199633ab2SPablo Neira Ayuso #endif 132c038a767SAmerigo Wang #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) 133c038a767SAmerigo Wang struct netns_nf_frag nf_frag; 1349ce7bc03SEric Dumazet struct ctl_table_header *nf_frag_frags_hdr; 135c038a767SAmerigo Wang #endif 136cd8c20b6SAlexey Dobriyan struct sock *nfnl; 137cd8c20b6SAlexey Dobriyan struct sock *nfnl_stash; 1383499abb2SAndreas Schultz #if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT) 1393499abb2SAndreas Schultz struct list_head nfnl_acct_list; 1403499abb2SAndreas Schultz #endif 14119576c94SPablo Neira #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) 14219576c94SPablo Neira struct list_head nfct_timeout_list; 14319576c94SPablo Neira #endif 1448d870052SAlexey Dobriyan #endif 1453d23e349SJohannes Berg #ifdef CONFIG_WEXT_CORE 146b333b3d2SJohannes Berg struct sk_buff_head wext_nlevents; 147b333b3d2SJohannes Berg #endif 1481c87733dSEric Dumazet struct net_generic __rcu *gen; 1498e602ce2SEric Dumazet 150d58e468bSPetar Penkov struct bpf_prog __rcu *flow_dissector_prog; 151d58e468bSPetar Penkov 1528e602ce2SEric Dumazet /* Note : following structs are cache line aligned */ 1538e602ce2SEric Dumazet #ifdef CONFIG_XFRM 1548e602ce2SEric Dumazet struct netns_xfrm xfrm; 1558e602ce2SEric Dumazet #endif 1568b4d14d8SJunweiZhang #if IS_ENABLED(CONFIG_IP_VS) 15761b1ab45SHans Schillstrom struct netns_ipvs *ipvs; 1588b4d14d8SJunweiZhang #endif 1590189197fSEric W. Biederman #if IS_ENABLED(CONFIG_MPLS) 1600189197fSEric W. Biederman struct netns_mpls mpls; 1610189197fSEric W. Biederman #endif 1628e8cda6dSMario Kicherer #if IS_ENABLED(CONFIG_CAN) 1638e8cda6dSMario Kicherer struct netns_can can; 1648e8cda6dSMario Kicherer #endif 1651d0dc069SBjörn Töpel #ifdef CONFIG_XDP_SOCKETS 1661d0dc069SBjörn Töpel struct netns_xdp xdp; 1671d0dc069SBjörn Töpel #endif 16851d7cccfSAndrey Vagin struct sock *diag_nlsk; 1695aad1de5STimo Teräs atomic_t fnhe_genid; 1703859a271SKees Cook } __randomize_layout; 1715f256becSEric W. Biederman 172c0f39322SDenis V. Lunev #include <linux/seq_file_net.h> 173c0f39322SDenis V. Lunev 1744fabcd71SDaniel Lezcano /* Init's network namespace */ 1755f256becSEric W. Biederman extern struct net init_net; 176a4aa834aSDenis V. Lunev 177d727abcbSEric W. Biederman #ifdef CONFIG_NET_NS 178e67e16eaSJoe Perches struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns, 179e67e16eaSJoe Perches struct net *old_net); 180225c0a01SDenis V. Lunev 181fbdeaed4STyler Hicks void net_ns_get_ownership(const struct net *net, kuid_t *uid, kgid_t *gid); 182fbdeaed4STyler Hicks 1837866cc57SFlorian Westphal void net_ns_barrier(void); 184d727abcbSEric W. Biederman #else /* CONFIG_NET_NS */ 185d727abcbSEric W. Biederman #include <linux/sched.h> 186d727abcbSEric W. Biederman #include <linux/nsproxy.h> 187038e7332SEric W. Biederman static inline struct net *copy_net_ns(unsigned long flags, 188038e7332SEric W. Biederman struct user_namespace *user_ns, struct net *old_net) 1899dd776b6SEric W. Biederman { 190d727abcbSEric W. Biederman if (flags & CLONE_NEWNET) 191d727abcbSEric W. Biederman return ERR_PTR(-EINVAL); 192d727abcbSEric W. Biederman return old_net; 1939dd776b6SEric W. Biederman } 1947866cc57SFlorian Westphal 195fbdeaed4STyler Hicks static inline void net_ns_get_ownership(const struct net *net, 196fbdeaed4STyler Hicks kuid_t *uid, kgid_t *gid) 197fbdeaed4STyler Hicks { 198fbdeaed4STyler Hicks *uid = GLOBAL_ROOT_UID; 199fbdeaed4STyler Hicks *gid = GLOBAL_ROOT_GID; 200fbdeaed4STyler Hicks } 201fbdeaed4STyler Hicks 2027866cc57SFlorian Westphal static inline void net_ns_barrier(void) {} 203d727abcbSEric W. Biederman #endif /* CONFIG_NET_NS */ 204225c0a01SDenis V. Lunev 205225c0a01SDenis V. Lunev 206225c0a01SDenis V. Lunev extern struct list_head net_namespace_list; 2079dd776b6SEric W. Biederman 208e67e16eaSJoe Perches struct net *get_net_ns_by_pid(pid_t pid); 2090f5258cdSStefan Hajnoczi struct net *get_net_ns_by_fd(int fd); 21030ffee84SJohannes Berg 211535d3ae9SRashika Kheria #ifdef CONFIG_SYSCTL 212535d3ae9SRashika Kheria void ipx_register_sysctl(void); 213535d3ae9SRashika Kheria void ipx_unregister_sysctl(void); 214535d3ae9SRashika Kheria #else 215535d3ae9SRashika Kheria #define ipx_register_sysctl() 216535d3ae9SRashika Kheria #define ipx_unregister_sysctl() 217535d3ae9SRashika Kheria #endif 218535d3ae9SRashika Kheria 219d4655795SPavel Emelyanov #ifdef CONFIG_NET_NS 220e67e16eaSJoe Perches void __put_net(struct net *net); 2215f256becSEric W. Biederman 2225f256becSEric W. Biederman static inline struct net *get_net(struct net *net) 2235f256becSEric W. Biederman { 224273c28bcSKirill Tkhai refcount_inc(&net->count); 2255f256becSEric W. Biederman return net; 2265f256becSEric W. Biederman } 2275f256becSEric W. Biederman 228077130c0SEric W. Biederman static inline struct net *maybe_get_net(struct net *net) 229077130c0SEric W. Biederman { 230077130c0SEric W. Biederman /* Used when we know struct net exists but we 231077130c0SEric W. Biederman * aren't guaranteed a previous reference count 232077130c0SEric W. Biederman * exists. If the reference count is zero this 233077130c0SEric W. Biederman * function fails and returns NULL. 234077130c0SEric W. Biederman */ 235273c28bcSKirill Tkhai if (!refcount_inc_not_zero(&net->count)) 236077130c0SEric W. Biederman net = NULL; 237077130c0SEric W. Biederman return net; 238077130c0SEric W. Biederman } 239077130c0SEric W. Biederman 2405f256becSEric W. Biederman static inline void put_net(struct net *net) 2415f256becSEric W. Biederman { 242273c28bcSKirill Tkhai if (refcount_dec_and_test(&net->count)) 2435f256becSEric W. Biederman __put_net(net); 2445f256becSEric W. Biederman } 2455f256becSEric W. Biederman 246878628fbSYOSHIFUJI Hideaki static inline 247878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 248878628fbSYOSHIFUJI Hideaki { 249878628fbSYOSHIFUJI Hideaki return net1 == net2; 250878628fbSYOSHIFUJI Hideaki } 251a685e089SAl Viro 2524ee806d5SDan Streetman static inline int check_net(const struct net *net) 2534ee806d5SDan Streetman { 2543e3ab9ccSDavid S. Miller return refcount_read(&net->count) != 0; 2554ee806d5SDan Streetman } 2564ee806d5SDan Streetman 257e67e16eaSJoe Perches void net_drop_ns(void *); 258a685e089SAl Viro 259d4655795SPavel Emelyanov #else 260b9f75f45SEric W. Biederman 261d4655795SPavel Emelyanov static inline struct net *get_net(struct net *net) 262d4655795SPavel Emelyanov { 263d4655795SPavel Emelyanov return net; 264d4655795SPavel Emelyanov } 265d4655795SPavel Emelyanov 266d4655795SPavel Emelyanov static inline void put_net(struct net *net) 267d4655795SPavel Emelyanov { 268d4655795SPavel Emelyanov } 269d4655795SPavel Emelyanov 270d4655795SPavel Emelyanov static inline struct net *maybe_get_net(struct net *net) 271d4655795SPavel Emelyanov { 272d4655795SPavel Emelyanov return net; 273d4655795SPavel Emelyanov } 274878628fbSYOSHIFUJI Hideaki 275878628fbSYOSHIFUJI Hideaki static inline 276878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 277878628fbSYOSHIFUJI Hideaki { 278878628fbSYOSHIFUJI Hideaki return 1; 279878628fbSYOSHIFUJI Hideaki } 280a685e089SAl Viro 2814ee806d5SDan Streetman static inline int check_net(const struct net *net) 2824ee806d5SDan Streetman { 2834ee806d5SDan Streetman return 1; 2844ee806d5SDan Streetman } 2854ee806d5SDan Streetman 286a685e089SAl Viro #define net_drop_ns NULL 287d4655795SPavel Emelyanov #endif 2885f256becSEric W. Biederman 2895d1e4468SDenis V. Lunev 2900c5c9fb5SEric W. Biederman typedef struct { 2918f424b5fSEric Dumazet #ifdef CONFIG_NET_NS 2920c5c9fb5SEric W. Biederman struct net *net; 2938f424b5fSEric Dumazet #endif 2940c5c9fb5SEric W. Biederman } possible_net_t; 2950c5c9fb5SEric W. Biederman 2960c5c9fb5SEric W. Biederman static inline void write_pnet(possible_net_t *pnet, struct net *net) 2970c5c9fb5SEric W. Biederman { 2980c5c9fb5SEric W. Biederman #ifdef CONFIG_NET_NS 2990c5c9fb5SEric W. Biederman pnet->net = net; 3000c5c9fb5SEric W. Biederman #endif 3010c5c9fb5SEric W. Biederman } 3020c5c9fb5SEric W. Biederman 3030c5c9fb5SEric W. Biederman static inline struct net *read_pnet(const possible_net_t *pnet) 3040c5c9fb5SEric W. Biederman { 3050c5c9fb5SEric W. Biederman #ifdef CONFIG_NET_NS 3060c5c9fb5SEric W. Biederman return pnet->net; 3070c5c9fb5SEric W. Biederman #else 3080c5c9fb5SEric W. Biederman return &init_net; 3090c5c9fb5SEric W. Biederman #endif 3100c5c9fb5SEric W. Biederman } 3115d1e4468SDenis V. Lunev 312f0b07bb1SKirill Tkhai /* Protected by net_rwsem */ 3135f256becSEric W. Biederman #define for_each_net(VAR) \ 3145f256becSEric W. Biederman list_for_each_entry(VAR, &net_namespace_list, list) 3155f256becSEric W. Biederman 31611a28d37SJohannes Berg #define for_each_net_rcu(VAR) \ 31711a28d37SJohannes Berg list_for_each_entry_rcu(VAR, &net_namespace_list, list) 31811a28d37SJohannes Berg 3194665079cSPavel Emelyanov #ifdef CONFIG_NET_NS 3204665079cSPavel Emelyanov #define __net_init 3214665079cSPavel Emelyanov #define __net_exit 322022cbae6SDenis V. Lunev #define __net_initdata 32304a6f82cSAndi Kleen #define __net_initconst 3244665079cSPavel Emelyanov #else 3254665079cSPavel Emelyanov #define __net_init __init 326bd721ea7SFabian Frederick #define __net_exit __ref 327022cbae6SDenis V. Lunev #define __net_initdata __initdata 32804a6f82cSAndi Kleen #define __net_initconst __initconst 3294665079cSPavel Emelyanov #endif 3305f256becSEric W. Biederman 3317a0877d4SNicolas Dichtel int peernet2id_alloc(struct net *net, struct net *peer); 33259324cf3SNicolas Dichtel int peernet2id(struct net *net, struct net *peer); 33359324cf3SNicolas Dichtel bool peernet_has_id(struct net *net, struct net *peer); 3340c7aecd4SNicolas Dichtel struct net *get_net_ns_by_id(struct net *net, int id); 3350c7aecd4SNicolas Dichtel 3365f256becSEric W. Biederman struct pernet_operations { 3375f256becSEric W. Biederman struct list_head list; 3386056415dSKirill Tkhai /* 3396056415dSKirill Tkhai * Below methods are called without any exclusive locks. 3406056415dSKirill Tkhai * More than one net may be constructed and destructed 3416056415dSKirill Tkhai * in parallel on several cpus. Every pernet_operations 3426056415dSKirill Tkhai * have to keep in mind all other pernet_operations and 3436056415dSKirill Tkhai * to introduce a locking, if they share common resources. 3446056415dSKirill Tkhai * 3458518e9bbSKirill Tkhai * The only time they are called with exclusive lock is 3468518e9bbSKirill Tkhai * from register_pernet_subsys(), unregister_pernet_subsys() 3478518e9bbSKirill Tkhai * register_pernet_device() and unregister_pernet_device(). 3488518e9bbSKirill Tkhai * 3496056415dSKirill Tkhai * Exit methods using blocking RCU primitives, such as 3506056415dSKirill Tkhai * synchronize_rcu(), should be implemented via exit_batch. 3516056415dSKirill Tkhai * Then, destruction of a group of net requires single 3526056415dSKirill Tkhai * synchronize_rcu() related to these pernet_operations, 3536056415dSKirill Tkhai * instead of separate synchronize_rcu() for every net. 3546056415dSKirill Tkhai * Please, avoid synchronize_rcu() at all, where it's possible. 3556056415dSKirill Tkhai */ 3565f256becSEric W. Biederman int (*init)(struct net *net); 3575f256becSEric W. Biederman void (*exit)(struct net *net); 35872ad937aSEric W. Biederman void (*exit_batch)(struct list_head *net_exit_list); 359c7d03a00SAlexey Dobriyan unsigned int *id; 360f875bae0SEric W. Biederman size_t size; 3615f256becSEric W. Biederman }; 3625f256becSEric W. Biederman 36317edde52SEric W. Biederman /* 36417edde52SEric W. Biederman * Use these carefully. If you implement a network device and it 36517edde52SEric W. Biederman * needs per network namespace operations use device pernet operations, 36617edde52SEric W. Biederman * otherwise use pernet subsys operations. 36717edde52SEric W. Biederman * 3684edf547bSJohannes Berg * Network interfaces need to be removed from a dying netns _before_ 3694edf547bSJohannes Berg * subsys notifiers can be called, as most of the network code cleanup 3704edf547bSJohannes Berg * (which is done from subsys notifiers) runs with the assumption that 3714edf547bSJohannes Berg * dev_remove_pack has been called so no new packets will arrive during 3724edf547bSJohannes Berg * and after the cleanup functions have been called. dev_remove_pack 3734edf547bSJohannes Berg * is not per namespace so instead the guarantee of no more packets 3744edf547bSJohannes Berg * arriving in a network namespace is provided by ensuring that all 3754edf547bSJohannes Berg * network devices and all sockets have left the network namespace 3764edf547bSJohannes Berg * before the cleanup methods are called. 37717edde52SEric W. Biederman * 37817edde52SEric W. Biederman * For the longest time the ipv4 icmp code was registered as a pernet 37917edde52SEric W. Biederman * device which caused kernel oops, and panics during network 38017edde52SEric W. Biederman * namespace cleanup. So please don't get this wrong. 38117edde52SEric W. Biederman */ 382e67e16eaSJoe Perches int register_pernet_subsys(struct pernet_operations *); 383e67e16eaSJoe Perches void unregister_pernet_subsys(struct pernet_operations *); 384e67e16eaSJoe Perches int register_pernet_device(struct pernet_operations *); 385e67e16eaSJoe Perches void unregister_pernet_device(struct pernet_operations *); 386f875bae0SEric W. Biederman 38795bdfccbSEric W. Biederman struct ctl_table; 38895bdfccbSEric W. Biederman struct ctl_table_header; 389d62c612eSPavel Emelyanov 3902ca794e5SEric W. Biederman #ifdef CONFIG_SYSCTL 391e67e16eaSJoe Perches int net_sysctl_init(void); 392e67e16eaSJoe Perches struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, 393e67e16eaSJoe Perches struct ctl_table *table); 394e67e16eaSJoe Perches void unregister_net_sysctl_table(struct ctl_table_header *header); 39548c74958SEric W. Biederman #else 39648c74958SEric W. Biederman static inline int net_sysctl_init(void) { return 0; } 39748c74958SEric W. Biederman static inline struct ctl_table_header *register_net_sysctl(struct net *net, 39848c74958SEric W. Biederman const char *path, struct ctl_table *table) 39948c74958SEric W. Biederman { 40048c74958SEric W. Biederman return NULL; 40148c74958SEric W. Biederman } 40248c74958SEric W. Biederman static inline void unregister_net_sysctl_table(struct ctl_table_header *header) 40348c74958SEric W. Biederman { 40448c74958SEric W. Biederman } 40548c74958SEric W. Biederman #endif 40648c74958SEric W. Biederman 407ca4c3fc2Sfan.du static inline int rt_genid_ipv4(struct net *net) 408b42664f8SNicolas Dichtel { 409ca4c3fc2Sfan.du return atomic_read(&net->ipv4.rt_genid); 410b42664f8SNicolas Dichtel } 411b42664f8SNicolas Dichtel 412ca4c3fc2Sfan.du static inline void rt_genid_bump_ipv4(struct net *net) 413b42664f8SNicolas Dichtel { 414ca4c3fc2Sfan.du atomic_inc(&net->ipv4.rt_genid); 415ca4c3fc2Sfan.du } 416ca4c3fc2Sfan.du 417705f1c86SHannes Frederic Sowa extern void (*__fib6_flush_trees)(struct net *net); 418ca4c3fc2Sfan.du static inline void rt_genid_bump_ipv6(struct net *net) 419ca4c3fc2Sfan.du { 420705f1c86SHannes Frederic Sowa if (__fib6_flush_trees) 421705f1c86SHannes Frederic Sowa __fib6_flush_trees(net); 422ca4c3fc2Sfan.du } 423ca4c3fc2Sfan.du 424599018a7SLuis R. Rodriguez #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) 425599018a7SLuis R. Rodriguez static inline struct netns_ieee802154_lowpan * 426599018a7SLuis R. Rodriguez net_ieee802154_lowpan(struct net *net) 427599018a7SLuis R. Rodriguez { 428599018a7SLuis R. Rodriguez return &net->ieee802154_lowpan; 429599018a7SLuis R. Rodriguez } 430599018a7SLuis R. Rodriguez #endif 431599018a7SLuis R. Rodriguez 432ca4c3fc2Sfan.du /* For callers who don't really care about whether it's IPv4 or IPv6 */ 433ca4c3fc2Sfan.du static inline void rt_genid_bump_all(struct net *net) 434ca4c3fc2Sfan.du { 435ca4c3fc2Sfan.du rt_genid_bump_ipv4(net); 436ca4c3fc2Sfan.du rt_genid_bump_ipv6(net); 437b42664f8SNicolas Dichtel } 43895bdfccbSEric W. Biederman 4395aad1de5STimo Teräs static inline int fnhe_genid(struct net *net) 4405aad1de5STimo Teräs { 4415aad1de5STimo Teräs return atomic_read(&net->fnhe_genid); 4425aad1de5STimo Teräs } 4435aad1de5STimo Teräs 4445aad1de5STimo Teräs static inline void fnhe_genid_bump(struct net *net) 4455aad1de5STimo Teräs { 4465aad1de5STimo Teräs atomic_inc(&net->fnhe_genid); 4475aad1de5STimo Teräs } 4485aad1de5STimo Teräs 4495f256becSEric W. Biederman #endif /* __NET_NET_NAMESPACE_H */ 450