Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Operations on the network namespace |
| 3 | */ |
| 4 | #ifndef __NET_NET_NAMESPACE_H |
| 5 | #define __NET_NET_NAMESPACE_H |
| 6 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 7 | #include <linux/atomic.h> |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 8 | #include <linux/workqueue.h> |
| 9 | #include <linux/list.h> |
David S. Miller | bee9525 | 2011-05-26 16:40:37 -0400 | [diff] [blame] | 10 | #include <linux/sysctl.h> |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 11 | |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 12 | #include <net/netns/core.h> |
Pavel Emelyanov | 852566f5 | 2008-07-18 04:01:24 -0700 | [diff] [blame] | 13 | #include <net/netns/mib.h> |
Denis V. Lunev | a0a53c8 | 2007-12-11 04:19:17 -0800 | [diff] [blame] | 14 | #include <net/netns/unix.h> |
Denis V. Lunev | 2aaef4e | 2007-12-11 04:19:54 -0800 | [diff] [blame] | 15 | #include <net/netns/packet.h> |
Pavel Emelyanov | 8afd351 | 2007-12-16 13:29:36 -0800 | [diff] [blame] | 16 | #include <net/netns/ipv4.h> |
Daniel Lezcano | b0f159d | 2008-01-10 02:49:06 -0800 | [diff] [blame] | 17 | #include <net/netns/ipv6.h> |
Alexander Aring | 633fc86 | 2014-02-28 07:32:49 +0100 | [diff] [blame] | 18 | #include <net/netns/ieee802154_6lowpan.h> |
Eric W. Biederman | 4db67e8 | 2012-08-06 08:42:04 +0000 | [diff] [blame] | 19 | #include <net/netns/sctp.h> |
Pavel Emelyanov | 67019cc | 2008-04-13 22:28:42 -0700 | [diff] [blame] | 20 | #include <net/netns/dccp.h> |
Gao feng | f3c1a44 | 2013-03-24 23:50:39 +0000 | [diff] [blame] | 21 | #include <net/netns/netfilter.h> |
Alexey Dobriyan | 8d87005 | 2008-01-31 04:02:13 -0800 | [diff] [blame] | 22 | #include <net/netns/x_tables.h> |
Alexey Dobriyan | dfdb8d7 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 23 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
| 24 | #include <net/netns/conntrack.h> |
| 25 | #endif |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 26 | #include <net/netns/nftables.h> |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 27 | #include <net/netns/xfrm.h> |
Denis V. Lunev | a0a53c8 | 2007-12-11 04:19:17 -0800 | [diff] [blame] | 28 | |
Eric W. Biederman | 038e733 | 2012-06-14 02:31:10 -0700 | [diff] [blame] | 29 | struct user_namespace; |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 30 | struct proc_dir_entry; |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 31 | struct net_device; |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 32 | struct sock; |
Pavel Emelyanov | 1597fbc | 2007-12-01 23:51:01 +1100 | [diff] [blame] | 33 | struct ctl_table_header; |
Pavel Emelyanov | dec827d | 2008-04-15 00:36:08 -0700 | [diff] [blame] | 34 | struct net_generic; |
Johannes Berg | 134e637 | 2009-07-10 09:51:34 +0000 | [diff] [blame] | 35 | struct sock; |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 36 | struct netns_ipvs; |
Pavel Emelyanov | 1597fbc | 2007-12-01 23:51:01 +1100 | [diff] [blame] | 37 | |
Eric Dumazet | 7c28bd0 | 2009-10-24 06:13:17 -0700 | [diff] [blame] | 38 | |
| 39 | #define NETDEV_HASHBITS 8 |
| 40 | #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS) |
| 41 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 42 | struct net { |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 43 | atomic_t passive; /* To decided when the network |
| 44 | * namespace should be freed. |
| 45 | */ |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 46 | atomic_t count; /* To decided when the network |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 47 | * namespace should be shut down. |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 48 | */ |
Denis V. Lunev | 5d1e446 | 2008-04-16 01:58:04 -0700 | [diff] [blame] | 49 | #ifdef NETNS_REFCNT_DEBUG |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 50 | atomic_t use_count; /* To track references we |
| 51 | * destroy on demand |
| 52 | */ |
Denis V. Lunev | 5d1e446 | 2008-04-16 01:58:04 -0700 | [diff] [blame] | 53 | #endif |
Eric Dumazet | 8e602ce | 2010-10-14 05:56:18 +0000 | [diff] [blame] | 54 | spinlock_t rules_mod_lock; |
| 55 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 56 | struct list_head list; /* list of network namespaces */ |
Eric W. Biederman | 2b035b3 | 2009-11-29 22:25:27 +0000 | [diff] [blame] | 57 | struct list_head cleanup_list; /* namespaces on death row */ |
Eric W. Biederman | 72ad937 | 2009-12-03 02:29:03 +0000 | [diff] [blame] | 58 | struct list_head exit_list; /* Use only net_mutex */ |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 59 | |
Eric W. Biederman | 038e733 | 2012-06-14 02:31:10 -0700 | [diff] [blame] | 60 | struct user_namespace *user_ns; /* Owning user namespace */ |
| 61 | |
Eric W. Biederman | 98f842e | 2011-06-15 10:21:48 -0700 | [diff] [blame] | 62 | unsigned int proc_inum; |
| 63 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 64 | struct proc_dir_entry *proc_net; |
| 65 | struct proc_dir_entry *proc_net_stat; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 66 | |
Al Viro | 7345509 | 2008-07-14 21:22:20 -0400 | [diff] [blame] | 67 | #ifdef CONFIG_SYSCTL |
| 68 | struct ctl_table_set sysctls; |
| 69 | #endif |
Eric W. Biederman | 95bdfcc | 2007-11-30 23:55:42 +1100 | [diff] [blame] | 70 | |
Eric Dumazet | 8e602ce | 2010-10-14 05:56:18 +0000 | [diff] [blame] | 71 | struct sock *rtnl; /* rtnetlink socket */ |
| 72 | struct sock *genl_sock; |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 73 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 74 | struct list_head dev_base_head; |
| 75 | struct hlist_head *dev_name_head; |
| 76 | struct hlist_head *dev_index_head; |
Thomas Graf | 4e985ad | 2011-06-21 03:11:20 +0000 | [diff] [blame] | 77 | unsigned int dev_base_seq; /* protected by rtnl_mutex */ |
Pavel Emelyanov | aa79e66 | 2012-08-08 21:53:19 +0000 | [diff] [blame] | 78 | int ifindex; |
Eric W. Biederman | 50624c9 | 2013-09-23 21:19:49 -0700 | [diff] [blame] | 79 | unsigned int dev_unreg_count; |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 80 | |
Denis V. Lunev | 5fd30ee | 2008-01-10 03:20:28 -0800 | [diff] [blame] | 81 | /* core fib_rules */ |
| 82 | struct list_head rules_ops; |
Denis V. Lunev | 5fd30ee | 2008-01-10 03:20:28 -0800 | [diff] [blame] | 83 | |
Denis V. Lunev | d12d01d | 2007-11-19 22:28:35 -0800 | [diff] [blame] | 84 | |
Eric Dumazet | 8e602ce | 2010-10-14 05:56:18 +0000 | [diff] [blame] | 85 | struct net_device *loopback_dev; /* The loopback */ |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 86 | struct netns_core core; |
Pavel Emelyanov | 852566f5 | 2008-07-18 04:01:24 -0700 | [diff] [blame] | 87 | struct netns_mib mib; |
Denis V. Lunev | 2aaef4e | 2007-12-11 04:19:54 -0800 | [diff] [blame] | 88 | struct netns_packet packet; |
Denis V. Lunev | a0a53c8 | 2007-12-11 04:19:17 -0800 | [diff] [blame] | 89 | struct netns_unix unx; |
Pavel Emelyanov | 8afd351 | 2007-12-16 13:29:36 -0800 | [diff] [blame] | 90 | struct netns_ipv4 ipv4; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 91 | #if IS_ENABLED(CONFIG_IPV6) |
Daniel Lezcano | b0f159d | 2008-01-10 02:49:06 -0800 | [diff] [blame] | 92 | struct netns_ipv6 ipv6; |
| 93 | #endif |
Alexander Aring | 633fc86 | 2014-02-28 07:32:49 +0100 | [diff] [blame] | 94 | #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) |
| 95 | struct netns_ieee802154_lowpan ieee802154_lowpan; |
| 96 | #endif |
Eric W. Biederman | 4db67e8 | 2012-08-06 08:42:04 +0000 | [diff] [blame] | 97 | #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE) |
| 98 | struct netns_sctp sctp; |
| 99 | #endif |
Pavel Emelyanov | 67019cc | 2008-04-13 22:28:42 -0700 | [diff] [blame] | 100 | #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) |
| 101 | struct netns_dccp dccp; |
| 102 | #endif |
Alexey Dobriyan | 8d87005 | 2008-01-31 04:02:13 -0800 | [diff] [blame] | 103 | #ifdef CONFIG_NETFILTER |
Gao feng | f3c1a44 | 2013-03-24 23:50:39 +0000 | [diff] [blame] | 104 | struct netns_nf nf; |
Alexey Dobriyan | 8d87005 | 2008-01-31 04:02:13 -0800 | [diff] [blame] | 105 | struct netns_xt xt; |
Alexey Dobriyan | dfdb8d7 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 106 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
| 107 | struct netns_ct ct; |
| 108 | #endif |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 109 | #if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE) |
| 110 | struct netns_nftables nft; |
| 111 | #endif |
Amerigo Wang | c038a76 | 2012-09-18 16:50:08 +0000 | [diff] [blame] | 112 | #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) |
| 113 | struct netns_nf_frag nf_frag; |
| 114 | #endif |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 115 | struct sock *nfnl; |
| 116 | struct sock *nfnl_stash; |
Alexey Dobriyan | 8d87005 | 2008-01-31 04:02:13 -0800 | [diff] [blame] | 117 | #endif |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 118 | #ifdef CONFIG_WEXT_CORE |
Johannes Berg | b333b3d22 | 2009-06-24 01:34:48 +0000 | [diff] [blame] | 119 | struct sk_buff_head wext_nlevents; |
| 120 | #endif |
Eric Dumazet | 1c87733 | 2010-10-25 03:20:11 +0000 | [diff] [blame] | 121 | struct net_generic __rcu *gen; |
Eric Dumazet | 8e602ce | 2010-10-14 05:56:18 +0000 | [diff] [blame] | 122 | |
| 123 | /* Note : following structs are cache line aligned */ |
| 124 | #ifdef CONFIG_XFRM |
| 125 | struct netns_xfrm xfrm; |
| 126 | #endif |
JunweiZhang | 8b4d14d | 2013-06-26 16:40:06 +0800 | [diff] [blame] | 127 | #if IS_ENABLED(CONFIG_IP_VS) |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 128 | struct netns_ipvs *ipvs; |
JunweiZhang | 8b4d14d | 2013-06-26 16:40:06 +0800 | [diff] [blame] | 129 | #endif |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 130 | struct sock *diag_nlsk; |
Timo Teräs | 5aad1de | 2013-05-27 20:46:33 +0000 | [diff] [blame] | 131 | atomic_t fnhe_genid; |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 132 | }; |
| 133 | |
Pavel Emelyanov | 1fb9489 | 2012-08-08 21:53:36 +0000 | [diff] [blame] | 134 | /* |
| 135 | * ifindex generation is per-net namespace, and loopback is |
| 136 | * always the 1st device in ns (see net_dev_init), thus any |
| 137 | * loopback device should get ifindex 1 |
| 138 | */ |
| 139 | |
| 140 | #define LOOPBACK_IFINDEX 1 |
Denis V. Lunev | 225c0a0 | 2008-04-02 00:09:29 -0700 | [diff] [blame] | 141 | |
Denis V. Lunev | c0f3932 | 2008-04-02 00:10:28 -0700 | [diff] [blame] | 142 | #include <linux/seq_file_net.h> |
| 143 | |
Daniel Lezcano | 4fabcd7 | 2007-09-13 09:16:29 +0200 | [diff] [blame] | 144 | /* Init's network namespace */ |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 145 | extern struct net init_net; |
Denis V. Lunev | a4aa834 | 2008-04-03 13:04:33 -0700 | [diff] [blame] | 146 | |
Eric W. Biederman | d727abc | 2012-06-14 02:16:42 -0700 | [diff] [blame] | 147 | #ifdef CONFIG_NET_NS |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 148 | struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns, |
| 149 | struct net *old_net); |
Denis V. Lunev | 225c0a0 | 2008-04-02 00:09:29 -0700 | [diff] [blame] | 150 | |
Eric W. Biederman | d727abc | 2012-06-14 02:16:42 -0700 | [diff] [blame] | 151 | #else /* CONFIG_NET_NS */ |
| 152 | #include <linux/sched.h> |
| 153 | #include <linux/nsproxy.h> |
Eric W. Biederman | 038e733 | 2012-06-14 02:31:10 -0700 | [diff] [blame] | 154 | static inline struct net *copy_net_ns(unsigned long flags, |
| 155 | struct user_namespace *user_ns, struct net *old_net) |
Eric W. Biederman | 9dd776b | 2007-09-26 22:04:26 -0700 | [diff] [blame] | 156 | { |
Eric W. Biederman | d727abc | 2012-06-14 02:16:42 -0700 | [diff] [blame] | 157 | if (flags & CLONE_NEWNET) |
| 158 | return ERR_PTR(-EINVAL); |
| 159 | return old_net; |
Eric W. Biederman | 9dd776b | 2007-09-26 22:04:26 -0700 | [diff] [blame] | 160 | } |
Eric W. Biederman | d727abc | 2012-06-14 02:16:42 -0700 | [diff] [blame] | 161 | #endif /* CONFIG_NET_NS */ |
Denis V. Lunev | 225c0a0 | 2008-04-02 00:09:29 -0700 | [diff] [blame] | 162 | |
| 163 | |
| 164 | extern struct list_head net_namespace_list; |
Eric W. Biederman | 9dd776b | 2007-09-26 22:04:26 -0700 | [diff] [blame] | 165 | |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 166 | struct net *get_net_ns_by_pid(pid_t pid); |
| 167 | struct net *get_net_ns_by_fd(int pid); |
Johannes Berg | 30ffee8 | 2009-07-10 09:51:35 +0000 | [diff] [blame] | 168 | |
Rashika Kheria | 535d3ae | 2014-02-09 22:29:14 +0530 | [diff] [blame] | 169 | #ifdef CONFIG_SYSCTL |
| 170 | void ipx_register_sysctl(void); |
| 171 | void ipx_unregister_sysctl(void); |
| 172 | #else |
| 173 | #define ipx_register_sysctl() |
| 174 | #define ipx_unregister_sysctl() |
| 175 | #endif |
| 176 | |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 177 | #ifdef CONFIG_NET_NS |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 178 | void __put_net(struct net *net); |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 179 | |
| 180 | static inline struct net *get_net(struct net *net) |
| 181 | { |
| 182 | atomic_inc(&net->count); |
| 183 | return net; |
| 184 | } |
| 185 | |
Eric W. Biederman | 077130c | 2007-09-13 09:18:57 +0200 | [diff] [blame] | 186 | static inline struct net *maybe_get_net(struct net *net) |
| 187 | { |
| 188 | /* Used when we know struct net exists but we |
| 189 | * aren't guaranteed a previous reference count |
| 190 | * exists. If the reference count is zero this |
| 191 | * function fails and returns NULL. |
| 192 | */ |
| 193 | if (!atomic_inc_not_zero(&net->count)) |
| 194 | net = NULL; |
| 195 | return net; |
| 196 | } |
| 197 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 198 | static inline void put_net(struct net *net) |
| 199 | { |
| 200 | if (atomic_dec_and_test(&net->count)) |
| 201 | __put_net(net); |
| 202 | } |
| 203 | |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 204 | static inline |
| 205 | int net_eq(const struct net *net1, const struct net *net2) |
| 206 | { |
| 207 | return net1 == net2; |
| 208 | } |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 209 | |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 210 | void net_drop_ns(void *); |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 211 | |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 212 | #else |
Eric W. Biederman | b9f75f4 | 2008-06-20 22:16:51 -0700 | [diff] [blame] | 213 | |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 214 | static inline struct net *get_net(struct net *net) |
| 215 | { |
| 216 | return net; |
| 217 | } |
| 218 | |
| 219 | static inline void put_net(struct net *net) |
| 220 | { |
| 221 | } |
| 222 | |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 223 | static inline struct net *maybe_get_net(struct net *net) |
| 224 | { |
| 225 | return net; |
| 226 | } |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 227 | |
| 228 | static inline |
| 229 | int net_eq(const struct net *net1, const struct net *net2) |
| 230 | { |
| 231 | return 1; |
| 232 | } |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 233 | |
| 234 | #define net_drop_ns NULL |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 235 | #endif |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 236 | |
Denis V. Lunev | 5d1e446 | 2008-04-16 01:58:04 -0700 | [diff] [blame] | 237 | |
| 238 | #ifdef NETNS_REFCNT_DEBUG |
| 239 | static inline struct net *hold_net(struct net *net) |
| 240 | { |
| 241 | if (net) |
| 242 | atomic_inc(&net->use_count); |
| 243 | return net; |
| 244 | } |
| 245 | |
| 246 | static inline void release_net(struct net *net) |
| 247 | { |
| 248 | if (net) |
| 249 | atomic_dec(&net->use_count); |
| 250 | } |
| 251 | #else |
| 252 | static inline struct net *hold_net(struct net *net) |
| 253 | { |
| 254 | return net; |
| 255 | } |
| 256 | |
| 257 | static inline void release_net(struct net *net) |
| 258 | { |
| 259 | } |
| 260 | #endif |
| 261 | |
Eric Dumazet | 8f424b5 | 2008-11-12 00:53:30 -0800 | [diff] [blame] | 262 | #ifdef CONFIG_NET_NS |
| 263 | |
| 264 | static inline void write_pnet(struct net **pnet, struct net *net) |
| 265 | { |
| 266 | *pnet = net; |
| 267 | } |
| 268 | |
| 269 | static inline struct net *read_pnet(struct net * const *pnet) |
| 270 | { |
| 271 | return *pnet; |
| 272 | } |
| 273 | |
| 274 | #else |
| 275 | |
| 276 | #define write_pnet(pnet, net) do { (void)(net);} while (0) |
| 277 | #define read_pnet(pnet) (&init_net) |
| 278 | |
| 279 | #endif |
Denis V. Lunev | 5d1e446 | 2008-04-16 01:58:04 -0700 | [diff] [blame] | 280 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 281 | #define for_each_net(VAR) \ |
| 282 | list_for_each_entry(VAR, &net_namespace_list, list) |
| 283 | |
Johannes Berg | 11a28d3 | 2009-07-10 09:51:33 +0000 | [diff] [blame] | 284 | #define for_each_net_rcu(VAR) \ |
| 285 | list_for_each_entry_rcu(VAR, &net_namespace_list, list) |
| 286 | |
Pavel Emelyanov | 4665079 | 2007-10-08 20:38:39 -0700 | [diff] [blame] | 287 | #ifdef CONFIG_NET_NS |
| 288 | #define __net_init |
| 289 | #define __net_exit |
Denis V. Lunev | 022cbae | 2007-11-13 03:23:50 -0800 | [diff] [blame] | 290 | #define __net_initdata |
Andi Kleen | 04a6f82 | 2012-10-04 17:12:11 -0700 | [diff] [blame] | 291 | #define __net_initconst |
Pavel Emelyanov | 4665079 | 2007-10-08 20:38:39 -0700 | [diff] [blame] | 292 | #else |
| 293 | #define __net_init __init |
| 294 | #define __net_exit __exit_refok |
Denis V. Lunev | 022cbae | 2007-11-13 03:23:50 -0800 | [diff] [blame] | 295 | #define __net_initdata __initdata |
Andi Kleen | 04a6f82 | 2012-10-04 17:12:11 -0700 | [diff] [blame] | 296 | #define __net_initconst __initconst |
Pavel Emelyanov | 4665079 | 2007-10-08 20:38:39 -0700 | [diff] [blame] | 297 | #endif |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 298 | |
| 299 | struct pernet_operations { |
| 300 | struct list_head list; |
| 301 | int (*init)(struct net *net); |
| 302 | void (*exit)(struct net *net); |
Eric W. Biederman | 72ad937 | 2009-12-03 02:29:03 +0000 | [diff] [blame] | 303 | void (*exit_batch)(struct list_head *net_exit_list); |
Eric W. Biederman | f875bae | 2009-11-29 22:25:28 +0000 | [diff] [blame] | 304 | int *id; |
| 305 | size_t size; |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 306 | }; |
| 307 | |
Eric W. Biederman | 17edde5 | 2009-02-22 00:11:09 -0800 | [diff] [blame] | 308 | /* |
| 309 | * Use these carefully. If you implement a network device and it |
| 310 | * needs per network namespace operations use device pernet operations, |
| 311 | * otherwise use pernet subsys operations. |
| 312 | * |
Johannes Berg | 4edf547 | 2009-07-15 06:16:34 +0000 | [diff] [blame] | 313 | * Network interfaces need to be removed from a dying netns _before_ |
| 314 | * subsys notifiers can be called, as most of the network code cleanup |
| 315 | * (which is done from subsys notifiers) runs with the assumption that |
| 316 | * dev_remove_pack has been called so no new packets will arrive during |
| 317 | * and after the cleanup functions have been called. dev_remove_pack |
| 318 | * is not per namespace so instead the guarantee of no more packets |
| 319 | * arriving in a network namespace is provided by ensuring that all |
| 320 | * network devices and all sockets have left the network namespace |
| 321 | * before the cleanup methods are called. |
Eric W. Biederman | 17edde5 | 2009-02-22 00:11:09 -0800 | [diff] [blame] | 322 | * |
| 323 | * For the longest time the ipv4 icmp code was registered as a pernet |
| 324 | * device which caused kernel oops, and panics during network |
| 325 | * namespace cleanup. So please don't get this wrong. |
| 326 | */ |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 327 | int register_pernet_subsys(struct pernet_operations *); |
| 328 | void unregister_pernet_subsys(struct pernet_operations *); |
| 329 | int register_pernet_device(struct pernet_operations *); |
| 330 | void unregister_pernet_device(struct pernet_operations *); |
Eric W. Biederman | f875bae | 2009-11-29 22:25:28 +0000 | [diff] [blame] | 331 | |
Eric W. Biederman | 95bdfcc | 2007-11-30 23:55:42 +1100 | [diff] [blame] | 332 | struct ctl_table; |
| 333 | struct ctl_table_header; |
Pavel Emelyanov | d62c612 | 2008-05-19 13:45:33 -0700 | [diff] [blame] | 334 | |
Eric W. Biederman | 2ca794e | 2012-04-19 13:20:32 +0000 | [diff] [blame] | 335 | #ifdef CONFIG_SYSCTL |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 336 | int net_sysctl_init(void); |
| 337 | struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, |
| 338 | struct ctl_table *table); |
| 339 | void unregister_net_sysctl_table(struct ctl_table_header *header); |
Eric W. Biederman | 48c7495 | 2012-04-23 12:13:02 +0000 | [diff] [blame] | 340 | #else |
| 341 | static inline int net_sysctl_init(void) { return 0; } |
| 342 | static inline struct ctl_table_header *register_net_sysctl(struct net *net, |
| 343 | const char *path, struct ctl_table *table) |
| 344 | { |
| 345 | return NULL; |
| 346 | } |
| 347 | static inline void unregister_net_sysctl_table(struct ctl_table_header *header) |
| 348 | { |
| 349 | } |
| 350 | #endif |
| 351 | |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 352 | static inline int rt_genid_ipv4(struct net *net) |
Nicolas Dichtel | b42664f | 2012-09-10 22:09:44 +0000 | [diff] [blame] | 353 | { |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 354 | return atomic_read(&net->ipv4.rt_genid); |
Nicolas Dichtel | b42664f | 2012-09-10 22:09:44 +0000 | [diff] [blame] | 355 | } |
| 356 | |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 357 | static inline void rt_genid_bump_ipv4(struct net *net) |
Nicolas Dichtel | b42664f | 2012-09-10 22:09:44 +0000 | [diff] [blame] | 358 | { |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 359 | atomic_inc(&net->ipv4.rt_genid); |
| 360 | } |
| 361 | |
| 362 | #if IS_ENABLED(CONFIG_IPV6) |
| 363 | static inline int rt_genid_ipv6(struct net *net) |
| 364 | { |
| 365 | return atomic_read(&net->ipv6.rt_genid); |
| 366 | } |
| 367 | |
| 368 | static inline void rt_genid_bump_ipv6(struct net *net) |
| 369 | { |
| 370 | atomic_inc(&net->ipv6.rt_genid); |
| 371 | } |
| 372 | #else |
| 373 | static inline int rt_genid_ipv6(struct net *net) |
| 374 | { |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | static inline void rt_genid_bump_ipv6(struct net *net) |
| 379 | { |
| 380 | } |
| 381 | #endif |
| 382 | |
| 383 | /* For callers who don't really care about whether it's IPv4 or IPv6 */ |
| 384 | static inline void rt_genid_bump_all(struct net *net) |
| 385 | { |
| 386 | rt_genid_bump_ipv4(net); |
| 387 | rt_genid_bump_ipv6(net); |
Nicolas Dichtel | b42664f | 2012-09-10 22:09:44 +0000 | [diff] [blame] | 388 | } |
Eric W. Biederman | 95bdfcc | 2007-11-30 23:55:42 +1100 | [diff] [blame] | 389 | |
Timo Teräs | 5aad1de | 2013-05-27 20:46:33 +0000 | [diff] [blame] | 390 | static inline int fnhe_genid(struct net *net) |
| 391 | { |
| 392 | return atomic_read(&net->fnhe_genid); |
| 393 | } |
| 394 | |
| 395 | static inline void fnhe_genid_bump(struct net *net) |
| 396 | { |
| 397 | atomic_inc(&net->fnhe_genid); |
| 398 | } |
| 399 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 400 | #endif /* __NET_NET_NAMESPACE_H */ |