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> 135f256becSEric W. Biederman 146a662719SCong Wang #include <net/flow.h> 158efa6e93SPavel Emelyanov #include <net/netns/core.h> 16852566f5SPavel Emelyanov #include <net/netns/mib.h> 17a0a53c8bSDenis V. Lunev #include <net/netns/unix.h> 182aaef4e4SDenis V. Lunev #include <net/netns/packet.h> 198afd351cSPavel Emelyanov #include <net/netns/ipv4.h> 20b0f159dbSDaniel Lezcano #include <net/netns/ipv6.h> 21633fc86fSAlexander Aring #include <net/netns/ieee802154_6lowpan.h> 224db67e80SEric W. Biederman #include <net/netns/sctp.h> 2367019cc9SPavel Emelyanov #include <net/netns/dccp.h> 24f3c1a44aSGao feng #include <net/netns/netfilter.h> 258d870052SAlexey Dobriyan #include <net/netns/x_tables.h> 26dfdb8d79SAlexey Dobriyan #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) 27dfdb8d79SAlexey Dobriyan #include <net/netns/conntrack.h> 28dfdb8d79SAlexey Dobriyan #endif 2999633ab2SPablo Neira Ayuso #include <net/netns/nftables.h> 30d62ddc21SAlexey Dobriyan #include <net/netns/xfrm.h> 310189197fSEric W. Biederman #include <net/netns/mpls.h> 328e8cda6dSMario Kicherer #include <net/netns/can.h> 33435d5f4bSAl Viro #include <linux/ns_common.h> 3404c52decSPablo Neira Ayuso #include <linux/idr.h> 3504c52decSPablo Neira Ayuso #include <linux/skbuff.h> 36a0a53c8bSDenis V. Lunev 37038e7332SEric W. Biederman struct user_namespace; 38457c4cbcSEric W. Biederman struct proc_dir_entry; 392774c7abSEric W. Biederman struct net_device; 4097c53cacSDenis V. Lunev struct sock; 411597fbc0SPavel Emelyanov struct ctl_table_header; 42dec827d1SPavel Emelyanov struct net_generic; 4394e5e308SChristian Brauner struct uevent_sock; 442553d064SJulian Anastasov struct netns_ipvs; 451597fbc0SPavel Emelyanov 467c28bd0bSEric Dumazet 477c28bd0bSEric Dumazet #define NETDEV_HASHBITS 8 487c28bd0bSEric Dumazet #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS) 497c28bd0bSEric Dumazet 505f256becSEric W. Biederman struct net { 51c122e14dSReshetova, Elena refcount_t passive; /* To decided when the network 525f256becSEric W. Biederman * namespace should be freed. 535f256becSEric W. Biederman */ 54273c28bcSKirill Tkhai refcount_t count; /* To decided when the network 55a685e089SAl Viro * namespace should be shut down. 56a685e089SAl Viro */ 578e602ce2SEric Dumazet spinlock_t rules_mod_lock; 588e602ce2SEric Dumazet 5933cf7c90SEric Dumazet atomic64_t cookie_gen; 6033cf7c90SEric Dumazet 615f256becSEric W. Biederman struct list_head list; /* list of network namespaces */ 6219efbd93SKirill Tkhai struct list_head exit_list; /* To linked to call pernet exit 6319efbd93SKirill Tkhai * methods on dead net (net_sem 6419efbd93SKirill Tkhai * read locked), or to unregister 6519efbd93SKirill Tkhai * pernet ops (net_sem wr locked). 6619efbd93SKirill Tkhai */ 6765b7b5b9SKirill Tkhai struct llist_node cleanup_list; /* namespaces on death row */ 6865b7b5b9SKirill Tkhai 69038e7332SEric W. Biederman struct user_namespace *user_ns; /* Owning user namespace */ 7070328660SEric W. Biederman struct ucounts *ucounts; 71de133464SWANG Cong spinlock_t nsid_lock; 720c7aecd4SNicolas Dichtel struct idr netns_ids; 73038e7332SEric W. Biederman 74435d5f4bSAl Viro struct ns_common ns; 7598f842e6SEric W. Biederman 76457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net; 77457c4cbcSEric W. Biederman struct proc_dir_entry *proc_net_stat; 78881d966bSEric W. Biederman 7973455092SAl Viro #ifdef CONFIG_SYSCTL 8073455092SAl Viro struct ctl_table_set sysctls; 8173455092SAl Viro #endif 8295bdfccbSEric W. Biederman 838e602ce2SEric Dumazet struct sock *rtnl; /* rtnetlink socket */ 848e602ce2SEric Dumazet struct sock *genl_sock; 852774c7abSEric W. Biederman 8694e5e308SChristian Brauner struct uevent_sock *uevent_sock; /* uevent socket */ 8794e5e308SChristian Brauner 88881d966bSEric W. Biederman struct list_head dev_base_head; 89881d966bSEric W. Biederman struct hlist_head *dev_name_head; 90881d966bSEric W. Biederman struct hlist_head *dev_index_head; 914e985adaSThomas Graf unsigned int dev_base_seq; /* protected by rtnl_mutex */ 92aa79e66eSPavel Emelyanov int ifindex; 9350624c93SEric W. Biederman unsigned int dev_unreg_count; 9497c53cacSDenis V. Lunev 955fd30ee7SDenis V. Lunev /* core fib_rules */ 965fd30ee7SDenis V. Lunev struct list_head rules_ops; 975fd30ee7SDenis V. Lunev 9819efbd93SKirill Tkhai struct list_head fib_notifier_ops; /* protected by net_sem */ 99d12d01d6SDenis V. Lunev 1008e602ce2SEric Dumazet struct net_device *loopback_dev; /* The loopback */ 1018efa6e93SPavel Emelyanov struct netns_core core; 102852566f5SPavel Emelyanov struct netns_mib mib; 1032aaef4e4SDenis V. Lunev struct netns_packet packet; 104a0a53c8bSDenis V. Lunev struct netns_unix unx; 1058afd351cSPavel Emelyanov struct netns_ipv4 ipv4; 106dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 107b0f159dbSDaniel Lezcano struct netns_ipv6 ipv6; 108b0f159dbSDaniel Lezcano #endif 109633fc86fSAlexander Aring #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) 110633fc86fSAlexander Aring struct netns_ieee802154_lowpan ieee802154_lowpan; 111633fc86fSAlexander Aring #endif 1124db67e80SEric W. Biederman #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE) 1134db67e80SEric W. Biederman struct netns_sctp sctp; 1144db67e80SEric W. Biederman #endif 11567019cc9SPavel Emelyanov #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) 11667019cc9SPavel Emelyanov struct netns_dccp dccp; 11767019cc9SPavel Emelyanov #endif 1188d870052SAlexey Dobriyan #ifdef CONFIG_NETFILTER 119f3c1a44aSGao feng struct netns_nf nf; 1208d870052SAlexey Dobriyan struct netns_xt xt; 121dfdb8d79SAlexey Dobriyan #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) 122dfdb8d79SAlexey Dobriyan struct netns_ct ct; 123dfdb8d79SAlexey Dobriyan #endif 12499633ab2SPablo Neira Ayuso #if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE) 12599633ab2SPablo Neira Ayuso struct netns_nftables nft; 12699633ab2SPablo Neira Ayuso #endif 127c038a767SAmerigo Wang #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) 128c038a767SAmerigo Wang struct netns_nf_frag nf_frag; 129c038a767SAmerigo Wang #endif 130cd8c20b6SAlexey Dobriyan struct sock *nfnl; 131cd8c20b6SAlexey Dobriyan struct sock *nfnl_stash; 1323499abb2SAndreas Schultz #if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT) 1333499abb2SAndreas Schultz struct list_head nfnl_acct_list; 1343499abb2SAndreas Schultz #endif 13519576c94SPablo Neira #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) 13619576c94SPablo Neira struct list_head nfct_timeout_list; 13719576c94SPablo Neira #endif 1388d870052SAlexey Dobriyan #endif 1393d23e349SJohannes Berg #ifdef CONFIG_WEXT_CORE 140b333b3d2SJohannes Berg struct sk_buff_head wext_nlevents; 141b333b3d2SJohannes Berg #endif 1421c87733dSEric Dumazet struct net_generic __rcu *gen; 1438e602ce2SEric Dumazet 1448e602ce2SEric Dumazet /* Note : following structs are cache line aligned */ 1458e602ce2SEric Dumazet #ifdef CONFIG_XFRM 1468e602ce2SEric Dumazet struct netns_xfrm xfrm; 1478e602ce2SEric Dumazet #endif 1488b4d14d8SJunweiZhang #if IS_ENABLED(CONFIG_IP_VS) 14961b1ab45SHans Schillstrom struct netns_ipvs *ipvs; 1508b4d14d8SJunweiZhang #endif 1510189197fSEric W. Biederman #if IS_ENABLED(CONFIG_MPLS) 1520189197fSEric W. Biederman struct netns_mpls mpls; 1530189197fSEric W. Biederman #endif 1548e8cda6dSMario Kicherer #if IS_ENABLED(CONFIG_CAN) 1558e8cda6dSMario Kicherer struct netns_can can; 1568e8cda6dSMario Kicherer #endif 15751d7cccfSAndrey Vagin struct sock *diag_nlsk; 1585aad1de5STimo Teräs atomic_t fnhe_genid; 1593859a271SKees Cook } __randomize_layout; 1605f256becSEric W. Biederman 161c0f39322SDenis V. Lunev #include <linux/seq_file_net.h> 162c0f39322SDenis V. Lunev 1634fabcd71SDaniel Lezcano /* Init's network namespace */ 1645f256becSEric W. Biederman extern struct net init_net; 165a4aa834aSDenis V. Lunev 166d727abcbSEric W. Biederman #ifdef CONFIG_NET_NS 167e67e16eaSJoe Perches struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns, 168e67e16eaSJoe Perches struct net *old_net); 169225c0a01SDenis V. Lunev 1707866cc57SFlorian Westphal void net_ns_barrier(void); 171d727abcbSEric W. Biederman #else /* CONFIG_NET_NS */ 172d727abcbSEric W. Biederman #include <linux/sched.h> 173d727abcbSEric W. Biederman #include <linux/nsproxy.h> 174038e7332SEric W. Biederman static inline struct net *copy_net_ns(unsigned long flags, 175038e7332SEric W. Biederman struct user_namespace *user_ns, struct net *old_net) 1769dd776b6SEric W. Biederman { 177d727abcbSEric W. Biederman if (flags & CLONE_NEWNET) 178d727abcbSEric W. Biederman return ERR_PTR(-EINVAL); 179d727abcbSEric W. Biederman return old_net; 1809dd776b6SEric W. Biederman } 1817866cc57SFlorian Westphal 1827866cc57SFlorian Westphal static inline void net_ns_barrier(void) {} 183d727abcbSEric W. Biederman #endif /* CONFIG_NET_NS */ 184225c0a01SDenis V. Lunev 185225c0a01SDenis V. Lunev 186225c0a01SDenis V. Lunev extern struct list_head net_namespace_list; 1879dd776b6SEric W. Biederman 188e67e16eaSJoe Perches struct net *get_net_ns_by_pid(pid_t pid); 1890f5258cdSStefan Hajnoczi struct net *get_net_ns_by_fd(int fd); 19030ffee84SJohannes Berg 191535d3ae9SRashika Kheria #ifdef CONFIG_SYSCTL 192535d3ae9SRashika Kheria void ipx_register_sysctl(void); 193535d3ae9SRashika Kheria void ipx_unregister_sysctl(void); 194535d3ae9SRashika Kheria #else 195535d3ae9SRashika Kheria #define ipx_register_sysctl() 196535d3ae9SRashika Kheria #define ipx_unregister_sysctl() 197535d3ae9SRashika Kheria #endif 198535d3ae9SRashika Kheria 199d4655795SPavel Emelyanov #ifdef CONFIG_NET_NS 200e67e16eaSJoe Perches void __put_net(struct net *net); 2015f256becSEric W. Biederman 2025f256becSEric W. Biederman static inline struct net *get_net(struct net *net) 2035f256becSEric W. Biederman { 204273c28bcSKirill Tkhai refcount_inc(&net->count); 2055f256becSEric W. Biederman return net; 2065f256becSEric W. Biederman } 2075f256becSEric W. Biederman 208077130c0SEric W. Biederman static inline struct net *maybe_get_net(struct net *net) 209077130c0SEric W. Biederman { 210077130c0SEric W. Biederman /* Used when we know struct net exists but we 211077130c0SEric W. Biederman * aren't guaranteed a previous reference count 212077130c0SEric W. Biederman * exists. If the reference count is zero this 213077130c0SEric W. Biederman * function fails and returns NULL. 214077130c0SEric W. Biederman */ 215273c28bcSKirill Tkhai if (!refcount_inc_not_zero(&net->count)) 216077130c0SEric W. Biederman net = NULL; 217077130c0SEric W. Biederman return net; 218077130c0SEric W. Biederman } 219077130c0SEric W. Biederman 2205f256becSEric W. Biederman static inline void put_net(struct net *net) 2215f256becSEric W. Biederman { 222273c28bcSKirill Tkhai if (refcount_dec_and_test(&net->count)) 2235f256becSEric W. Biederman __put_net(net); 2245f256becSEric W. Biederman } 2255f256becSEric W. Biederman 226878628fbSYOSHIFUJI Hideaki static inline 227878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 228878628fbSYOSHIFUJI Hideaki { 229878628fbSYOSHIFUJI Hideaki return net1 == net2; 230878628fbSYOSHIFUJI Hideaki } 231a685e089SAl Viro 2324ee806d5SDan Streetman static inline int check_net(const struct net *net) 2334ee806d5SDan Streetman { 2343e3ab9ccSDavid S. Miller return refcount_read(&net->count) != 0; 2354ee806d5SDan Streetman } 2364ee806d5SDan Streetman 237e67e16eaSJoe Perches void net_drop_ns(void *); 238a685e089SAl Viro 239d4655795SPavel Emelyanov #else 240b9f75f45SEric W. Biederman 241d4655795SPavel Emelyanov static inline struct net *get_net(struct net *net) 242d4655795SPavel Emelyanov { 243d4655795SPavel Emelyanov return net; 244d4655795SPavel Emelyanov } 245d4655795SPavel Emelyanov 246d4655795SPavel Emelyanov static inline void put_net(struct net *net) 247d4655795SPavel Emelyanov { 248d4655795SPavel Emelyanov } 249d4655795SPavel Emelyanov 250d4655795SPavel Emelyanov static inline struct net *maybe_get_net(struct net *net) 251d4655795SPavel Emelyanov { 252d4655795SPavel Emelyanov return net; 253d4655795SPavel Emelyanov } 254878628fbSYOSHIFUJI Hideaki 255878628fbSYOSHIFUJI Hideaki static inline 256878628fbSYOSHIFUJI Hideaki int net_eq(const struct net *net1, const struct net *net2) 257878628fbSYOSHIFUJI Hideaki { 258878628fbSYOSHIFUJI Hideaki return 1; 259878628fbSYOSHIFUJI Hideaki } 260a685e089SAl Viro 2614ee806d5SDan Streetman static inline int check_net(const struct net *net) 2624ee806d5SDan Streetman { 2634ee806d5SDan Streetman return 1; 2644ee806d5SDan Streetman } 2654ee806d5SDan Streetman 266a685e089SAl Viro #define net_drop_ns NULL 267d4655795SPavel Emelyanov #endif 2685f256becSEric W. Biederman 2695d1e4468SDenis V. Lunev 2700c5c9fb5SEric W. Biederman typedef struct { 2718f424b5fSEric Dumazet #ifdef CONFIG_NET_NS 2720c5c9fb5SEric W. Biederman struct net *net; 2738f424b5fSEric Dumazet #endif 2740c5c9fb5SEric W. Biederman } possible_net_t; 2750c5c9fb5SEric W. Biederman 2760c5c9fb5SEric W. Biederman static inline void write_pnet(possible_net_t *pnet, struct net *net) 2770c5c9fb5SEric W. Biederman { 2780c5c9fb5SEric W. Biederman #ifdef CONFIG_NET_NS 2790c5c9fb5SEric W. Biederman pnet->net = net; 2800c5c9fb5SEric W. Biederman #endif 2810c5c9fb5SEric W. Biederman } 2820c5c9fb5SEric W. Biederman 2830c5c9fb5SEric W. Biederman static inline struct net *read_pnet(const possible_net_t *pnet) 2840c5c9fb5SEric W. Biederman { 2850c5c9fb5SEric W. Biederman #ifdef CONFIG_NET_NS 2860c5c9fb5SEric W. Biederman return pnet->net; 2870c5c9fb5SEric W. Biederman #else 2880c5c9fb5SEric W. Biederman return &init_net; 2890c5c9fb5SEric W. Biederman #endif 2900c5c9fb5SEric W. Biederman } 2915d1e4468SDenis V. Lunev 2925f256becSEric W. Biederman #define for_each_net(VAR) \ 2935f256becSEric W. Biederman list_for_each_entry(VAR, &net_namespace_list, list) 2945f256becSEric W. Biederman 29511a28d37SJohannes Berg #define for_each_net_rcu(VAR) \ 29611a28d37SJohannes Berg list_for_each_entry_rcu(VAR, &net_namespace_list, list) 29711a28d37SJohannes Berg 2984665079cSPavel Emelyanov #ifdef CONFIG_NET_NS 2994665079cSPavel Emelyanov #define __net_init 3004665079cSPavel Emelyanov #define __net_exit 301022cbae6SDenis V. Lunev #define __net_initdata 30204a6f82cSAndi Kleen #define __net_initconst 3034665079cSPavel Emelyanov #else 3044665079cSPavel Emelyanov #define __net_init __init 305bd721ea7SFabian Frederick #define __net_exit __ref 306022cbae6SDenis V. Lunev #define __net_initdata __initdata 30704a6f82cSAndi Kleen #define __net_initconst __initconst 3084665079cSPavel Emelyanov #endif 3095f256becSEric W. Biederman 3107a0877d4SNicolas Dichtel int peernet2id_alloc(struct net *net, struct net *peer); 31159324cf3SNicolas Dichtel int peernet2id(struct net *net, struct net *peer); 31259324cf3SNicolas Dichtel bool peernet_has_id(struct net *net, struct net *peer); 3130c7aecd4SNicolas Dichtel struct net *get_net_ns_by_id(struct net *net, int id); 3140c7aecd4SNicolas Dichtel 3155f256becSEric W. Biederman struct pernet_operations { 3165f256becSEric W. Biederman struct list_head list; 3176056415dSKirill Tkhai /* 3186056415dSKirill Tkhai * Below methods are called without any exclusive locks. 3196056415dSKirill Tkhai * More than one net may be constructed and destructed 3206056415dSKirill Tkhai * in parallel on several cpus. Every pernet_operations 3216056415dSKirill Tkhai * have to keep in mind all other pernet_operations and 3226056415dSKirill Tkhai * to introduce a locking, if they share common resources. 3236056415dSKirill Tkhai * 3246056415dSKirill Tkhai * Exit methods using blocking RCU primitives, such as 3256056415dSKirill Tkhai * synchronize_rcu(), should be implemented via exit_batch. 3266056415dSKirill Tkhai * Then, destruction of a group of net requires single 3276056415dSKirill Tkhai * synchronize_rcu() related to these pernet_operations, 3286056415dSKirill Tkhai * instead of separate synchronize_rcu() for every net. 3296056415dSKirill Tkhai * Please, avoid synchronize_rcu() at all, where it's possible. 3306056415dSKirill Tkhai */ 3315f256becSEric W. Biederman int (*init)(struct net *net); 3325f256becSEric W. Biederman void (*exit)(struct net *net); 33372ad937aSEric W. Biederman void (*exit_batch)(struct list_head *net_exit_list); 334c7d03a00SAlexey Dobriyan unsigned int *id; 335f875bae0SEric W. Biederman size_t size; 336447cd7a0SKirill Tkhai /* 337447cd7a0SKirill Tkhai * Indicates above methods are allowed to be executed in parallel 338447cd7a0SKirill Tkhai * with methods of any other pernet_operations, i.e. they are not 33919efbd93SKirill Tkhai * need write locked net_sem. 340447cd7a0SKirill Tkhai */ 341447cd7a0SKirill Tkhai bool async; 3425f256becSEric W. Biederman }; 3435f256becSEric W. Biederman 34417edde52SEric W. Biederman /* 34517edde52SEric W. Biederman * Use these carefully. If you implement a network device and it 34617edde52SEric W. Biederman * needs per network namespace operations use device pernet operations, 34717edde52SEric W. Biederman * otherwise use pernet subsys operations. 34817edde52SEric W. Biederman * 3494edf547bSJohannes Berg * Network interfaces need to be removed from a dying netns _before_ 3504edf547bSJohannes Berg * subsys notifiers can be called, as most of the network code cleanup 3514edf547bSJohannes Berg * (which is done from subsys notifiers) runs with the assumption that 3524edf547bSJohannes Berg * dev_remove_pack has been called so no new packets will arrive during 3534edf547bSJohannes Berg * and after the cleanup functions have been called. dev_remove_pack 3544edf547bSJohannes Berg * is not per namespace so instead the guarantee of no more packets 3554edf547bSJohannes Berg * arriving in a network namespace is provided by ensuring that all 3564edf547bSJohannes Berg * network devices and all sockets have left the network namespace 3574edf547bSJohannes Berg * before the cleanup methods are called. 35817edde52SEric W. Biederman * 35917edde52SEric W. Biederman * For the longest time the ipv4 icmp code was registered as a pernet 36017edde52SEric W. Biederman * device which caused kernel oops, and panics during network 36117edde52SEric W. Biederman * namespace cleanup. So please don't get this wrong. 36217edde52SEric W. Biederman */ 363e67e16eaSJoe Perches int register_pernet_subsys(struct pernet_operations *); 364e67e16eaSJoe Perches void unregister_pernet_subsys(struct pernet_operations *); 365e67e16eaSJoe Perches int register_pernet_device(struct pernet_operations *); 366e67e16eaSJoe Perches void unregister_pernet_device(struct pernet_operations *); 367f875bae0SEric W. Biederman 36895bdfccbSEric W. Biederman struct ctl_table; 36995bdfccbSEric W. Biederman struct ctl_table_header; 370d62c612eSPavel Emelyanov 3712ca794e5SEric W. Biederman #ifdef CONFIG_SYSCTL 372e67e16eaSJoe Perches int net_sysctl_init(void); 373e67e16eaSJoe Perches struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, 374e67e16eaSJoe Perches struct ctl_table *table); 375e67e16eaSJoe Perches void unregister_net_sysctl_table(struct ctl_table_header *header); 37648c74958SEric W. Biederman #else 37748c74958SEric W. Biederman static inline int net_sysctl_init(void) { return 0; } 37848c74958SEric W. Biederman static inline struct ctl_table_header *register_net_sysctl(struct net *net, 37948c74958SEric W. Biederman const char *path, struct ctl_table *table) 38048c74958SEric W. Biederman { 38148c74958SEric W. Biederman return NULL; 38248c74958SEric W. Biederman } 38348c74958SEric W. Biederman static inline void unregister_net_sysctl_table(struct ctl_table_header *header) 38448c74958SEric W. Biederman { 38548c74958SEric W. Biederman } 38648c74958SEric W. Biederman #endif 38748c74958SEric W. Biederman 388ca4c3fc2Sfan.du static inline int rt_genid_ipv4(struct net *net) 389b42664f8SNicolas Dichtel { 390ca4c3fc2Sfan.du return atomic_read(&net->ipv4.rt_genid); 391b42664f8SNicolas Dichtel } 392b42664f8SNicolas Dichtel 393ca4c3fc2Sfan.du static inline void rt_genid_bump_ipv4(struct net *net) 394b42664f8SNicolas Dichtel { 395ca4c3fc2Sfan.du atomic_inc(&net->ipv4.rt_genid); 396ca4c3fc2Sfan.du } 397ca4c3fc2Sfan.du 398705f1c86SHannes Frederic Sowa extern void (*__fib6_flush_trees)(struct net *net); 399ca4c3fc2Sfan.du static inline void rt_genid_bump_ipv6(struct net *net) 400ca4c3fc2Sfan.du { 401705f1c86SHannes Frederic Sowa if (__fib6_flush_trees) 402705f1c86SHannes Frederic Sowa __fib6_flush_trees(net); 403ca4c3fc2Sfan.du } 404ca4c3fc2Sfan.du 405599018a7SLuis R. Rodriguez #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) 406599018a7SLuis R. Rodriguez static inline struct netns_ieee802154_lowpan * 407599018a7SLuis R. Rodriguez net_ieee802154_lowpan(struct net *net) 408599018a7SLuis R. Rodriguez { 409599018a7SLuis R. Rodriguez return &net->ieee802154_lowpan; 410599018a7SLuis R. Rodriguez } 411599018a7SLuis R. Rodriguez #endif 412599018a7SLuis R. Rodriguez 413ca4c3fc2Sfan.du /* For callers who don't really care about whether it's IPv4 or IPv6 */ 414ca4c3fc2Sfan.du static inline void rt_genid_bump_all(struct net *net) 415ca4c3fc2Sfan.du { 416ca4c3fc2Sfan.du rt_genid_bump_ipv4(net); 417ca4c3fc2Sfan.du rt_genid_bump_ipv6(net); 418b42664f8SNicolas Dichtel } 41995bdfccbSEric W. Biederman 4205aad1de5STimo Teräs static inline int fnhe_genid(struct net *net) 4215aad1de5STimo Teräs { 4225aad1de5STimo Teräs return atomic_read(&net->fnhe_genid); 4235aad1de5STimo Teräs } 4245aad1de5STimo Teräs 4255aad1de5STimo Teräs static inline void fnhe_genid_bump(struct net *net) 4265aad1de5STimo Teräs { 4275aad1de5STimo Teräs atomic_inc(&net->fnhe_genid); 4285aad1de5STimo Teräs } 4295aad1de5STimo Teräs 4305f256becSEric W. Biederman #endif /* __NET_NET_NAMESPACE_H */ 431