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 | |
Cong Wang | 6a66271 | 2014-04-15 16:25:34 -0700 | [diff] [blame] | 12 | #include <net/flow.h> |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 13 | #include <net/netns/core.h> |
Pavel Emelyanov | 852566f | 2008-07-18 04:01:24 -0700 | [diff] [blame] | 14 | #include <net/netns/mib.h> |
Denis V. Lunev | a0a53c8 | 2007-12-11 04:19:17 -0800 | [diff] [blame] | 15 | #include <net/netns/unix.h> |
Denis V. Lunev | 2aaef4e | 2007-12-11 04:19:54 -0800 | [diff] [blame] | 16 | #include <net/netns/packet.h> |
Pavel Emelyanov | 8afd351 | 2007-12-16 13:29:36 -0800 | [diff] [blame] | 17 | #include <net/netns/ipv4.h> |
Daniel Lezcano | b0f159d | 2008-01-10 02:49:06 -0800 | [diff] [blame] | 18 | #include <net/netns/ipv6.h> |
Alexander Aring | 633fc86 | 2014-02-28 07:32:49 +0100 | [diff] [blame] | 19 | #include <net/netns/ieee802154_6lowpan.h> |
Eric W. Biederman | 4db67e8 | 2012-08-06 08:42:04 +0000 | [diff] [blame] | 20 | #include <net/netns/sctp.h> |
Pavel Emelyanov | 67019cc | 2008-04-13 22:28:42 -0700 | [diff] [blame] | 21 | #include <net/netns/dccp.h> |
Gao feng | f3c1a44 | 2013-03-24 23:50:39 +0000 | [diff] [blame] | 22 | #include <net/netns/netfilter.h> |
Alexey Dobriyan | 8d87005 | 2008-01-31 04:02:13 -0800 | [diff] [blame] | 23 | #include <net/netns/x_tables.h> |
Alexey Dobriyan | dfdb8d7 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 24 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
| 25 | #include <net/netns/conntrack.h> |
| 26 | #endif |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 27 | #include <net/netns/nftables.h> |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 28 | #include <net/netns/xfrm.h> |
Eric W. Biederman | 0189197 | 2015-03-03 19:10:47 -0600 | [diff] [blame] | 29 | #include <net/netns/mpls.h> |
Al Viro | 435d5f4 | 2014-10-31 22:56:04 -0400 | [diff] [blame] | 30 | #include <linux/ns_common.h> |
Pablo Neira Ayuso | 04c52de | 2015-06-17 10:28:25 -0500 | [diff] [blame] | 31 | #include <linux/idr.h> |
| 32 | #include <linux/skbuff.h> |
Denis V. Lunev | a0a53c8 | 2007-12-11 04:19:17 -0800 | [diff] [blame] | 33 | |
Eric W. Biederman | 038e733 | 2012-06-14 02:31:10 -0700 | [diff] [blame] | 34 | struct user_namespace; |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 35 | struct proc_dir_entry; |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 36 | struct net_device; |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 37 | struct sock; |
Pavel Emelyanov | 1597fbc | 2007-12-01 23:51:01 +1100 | [diff] [blame] | 38 | struct ctl_table_header; |
Pavel Emelyanov | dec827d | 2008-04-15 00:36:08 -0700 | [diff] [blame] | 39 | struct net_generic; |
Johannes Berg | 134e637 | 2009-07-10 09:51:34 +0000 | [diff] [blame] | 40 | struct sock; |
Julian Anastasov | 2553d06 | 2011-03-04 12:18:07 +0200 | [diff] [blame] | 41 | struct netns_ipvs; |
Pavel Emelyanov | 1597fbc | 2007-12-01 23:51:01 +1100 | [diff] [blame] | 42 | |
Eric Dumazet | 7c28bd0 | 2009-10-24 06:13:17 -0700 | [diff] [blame] | 43 | |
| 44 | #define NETDEV_HASHBITS 8 |
| 45 | #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS) |
| 46 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 47 | struct net { |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 48 | atomic_t passive; /* To decided when the network |
| 49 | * namespace should be freed. |
| 50 | */ |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 51 | atomic_t count; /* To decided when the network |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 52 | * namespace should be shut down. |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 53 | */ |
Eric Dumazet | 8e602ce | 2010-10-14 05:56:18 +0000 | [diff] [blame] | 54 | spinlock_t rules_mod_lock; |
| 55 | |
Eric Dumazet | 33cf7c9 | 2015-03-11 18:53:14 -0700 | [diff] [blame] | 56 | atomic64_t cookie_gen; |
| 57 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 58 | struct list_head list; /* list of network namespaces */ |
Eric W. Biederman | 2b035b3 | 2009-11-29 22:25:27 +0000 | [diff] [blame] | 59 | struct list_head cleanup_list; /* namespaces on death row */ |
Eric W. Biederman | 72ad937 | 2009-12-03 02:29:03 +0000 | [diff] [blame] | 60 | struct list_head exit_list; /* Use only net_mutex */ |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 61 | |
Eric W. Biederman | 038e733 | 2012-06-14 02:31:10 -0700 | [diff] [blame] | 62 | struct user_namespace *user_ns; /* Owning user namespace */ |
Eric W. Biederman | 7032866 | 2016-08-08 14:33:23 -0500 | [diff] [blame] | 63 | struct ucounts *ucounts; |
WANG Cong | de13346 | 2015-05-15 14:47:32 -0700 | [diff] [blame] | 64 | spinlock_t nsid_lock; |
Nicolas Dichtel | 0c7aecd | 2015-01-15 15:11:15 +0100 | [diff] [blame] | 65 | struct idr netns_ids; |
Eric W. Biederman | 038e733 | 2012-06-14 02:31:10 -0700 | [diff] [blame] | 66 | |
Al Viro | 435d5f4 | 2014-10-31 22:56:04 -0400 | [diff] [blame] | 67 | struct ns_common ns; |
Eric W. Biederman | 98f842e | 2011-06-15 10:21:48 -0700 | [diff] [blame] | 68 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 69 | struct proc_dir_entry *proc_net; |
| 70 | struct proc_dir_entry *proc_net_stat; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 71 | |
Al Viro | 7345509 | 2008-07-14 21:22:20 -0400 | [diff] [blame] | 72 | #ifdef CONFIG_SYSCTL |
| 73 | struct ctl_table_set sysctls; |
| 74 | #endif |
Eric W. Biederman | 95bdfcc | 2007-11-30 23:55:42 +1100 | [diff] [blame] | 75 | |
Eric Dumazet | 8e602ce | 2010-10-14 05:56:18 +0000 | [diff] [blame] | 76 | struct sock *rtnl; /* rtnetlink socket */ |
| 77 | struct sock *genl_sock; |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 78 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 79 | struct list_head dev_base_head; |
| 80 | struct hlist_head *dev_name_head; |
| 81 | struct hlist_head *dev_index_head; |
Thomas Graf | 4e985ad | 2011-06-21 03:11:20 +0000 | [diff] [blame] | 82 | unsigned int dev_base_seq; /* protected by rtnl_mutex */ |
Pavel Emelyanov | aa79e66 | 2012-08-08 21:53:19 +0000 | [diff] [blame] | 83 | int ifindex; |
Eric W. Biederman | 50624c9 | 2013-09-23 21:19:49 -0700 | [diff] [blame] | 84 | unsigned int dev_unreg_count; |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 85 | |
Denis V. Lunev | 5fd30ee | 2008-01-10 03:20:28 -0800 | [diff] [blame] | 86 | /* core fib_rules */ |
| 87 | struct list_head rules_ops; |
Denis V. Lunev | 5fd30ee | 2008-01-10 03:20:28 -0800 | [diff] [blame] | 88 | |
Denis V. Lunev | d12d01d | 2007-11-19 22:28:35 -0800 | [diff] [blame] | 89 | |
Eric Dumazet | 8e602ce | 2010-10-14 05:56:18 +0000 | [diff] [blame] | 90 | struct net_device *loopback_dev; /* The loopback */ |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 91 | struct netns_core core; |
Pavel Emelyanov | 852566f | 2008-07-18 04:01:24 -0700 | [diff] [blame] | 92 | struct netns_mib mib; |
Denis V. Lunev | 2aaef4e | 2007-12-11 04:19:54 -0800 | [diff] [blame] | 93 | struct netns_packet packet; |
Denis V. Lunev | a0a53c8 | 2007-12-11 04:19:17 -0800 | [diff] [blame] | 94 | struct netns_unix unx; |
Pavel Emelyanov | 8afd351 | 2007-12-16 13:29:36 -0800 | [diff] [blame] | 95 | struct netns_ipv4 ipv4; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 96 | #if IS_ENABLED(CONFIG_IPV6) |
Daniel Lezcano | b0f159d | 2008-01-10 02:49:06 -0800 | [diff] [blame] | 97 | struct netns_ipv6 ipv6; |
| 98 | #endif |
Alexander Aring | 633fc86 | 2014-02-28 07:32:49 +0100 | [diff] [blame] | 99 | #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) |
| 100 | struct netns_ieee802154_lowpan ieee802154_lowpan; |
| 101 | #endif |
Eric W. Biederman | 4db67e8 | 2012-08-06 08:42:04 +0000 | [diff] [blame] | 102 | #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE) |
| 103 | struct netns_sctp sctp; |
| 104 | #endif |
Pavel Emelyanov | 67019cc | 2008-04-13 22:28:42 -0700 | [diff] [blame] | 105 | #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) |
| 106 | struct netns_dccp dccp; |
| 107 | #endif |
Alexey Dobriyan | 8d87005 | 2008-01-31 04:02:13 -0800 | [diff] [blame] | 108 | #ifdef CONFIG_NETFILTER |
Gao feng | f3c1a44 | 2013-03-24 23:50:39 +0000 | [diff] [blame] | 109 | struct netns_nf nf; |
Alexey Dobriyan | 8d87005 | 2008-01-31 04:02:13 -0800 | [diff] [blame] | 110 | struct netns_xt xt; |
Alexey Dobriyan | dfdb8d7 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 111 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
| 112 | struct netns_ct ct; |
| 113 | #endif |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 114 | #if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE) |
| 115 | struct netns_nftables nft; |
| 116 | #endif |
Amerigo Wang | c038a76 | 2012-09-18 16:50:08 +0000 | [diff] [blame] | 117 | #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) |
| 118 | struct netns_nf_frag nf_frag; |
| 119 | #endif |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 120 | struct sock *nfnl; |
| 121 | struct sock *nfnl_stash; |
Andreas Schultz | 3499abb | 2015-08-05 17:51:45 +0200 | [diff] [blame] | 122 | #if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT) |
| 123 | struct list_head nfnl_acct_list; |
| 124 | #endif |
Pablo Neira | 19576c9 | 2015-12-09 14:07:40 +0100 | [diff] [blame] | 125 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
| 126 | struct list_head nfct_timeout_list; |
| 127 | #endif |
Alexey Dobriyan | 8d87005 | 2008-01-31 04:02:13 -0800 | [diff] [blame] | 128 | #endif |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 129 | #ifdef CONFIG_WEXT_CORE |
Johannes Berg | b333b3d22 | 2009-06-24 01:34:48 +0000 | [diff] [blame] | 130 | struct sk_buff_head wext_nlevents; |
| 131 | #endif |
Eric Dumazet | 1c87733 | 2010-10-25 03:20:11 +0000 | [diff] [blame] | 132 | struct net_generic __rcu *gen; |
Eric Dumazet | 8e602ce | 2010-10-14 05:56:18 +0000 | [diff] [blame] | 133 | |
| 134 | /* Note : following structs are cache line aligned */ |
| 135 | #ifdef CONFIG_XFRM |
| 136 | struct netns_xfrm xfrm; |
| 137 | #endif |
JunweiZhang | 8b4d14d | 2013-06-26 16:40:06 +0800 | [diff] [blame] | 138 | #if IS_ENABLED(CONFIG_IP_VS) |
Hans Schillstrom | 61b1ab4 | 2011-01-03 14:44:42 +0100 | [diff] [blame] | 139 | struct netns_ipvs *ipvs; |
JunweiZhang | 8b4d14d | 2013-06-26 16:40:06 +0800 | [diff] [blame] | 140 | #endif |
Eric W. Biederman | 0189197 | 2015-03-03 19:10:47 -0600 | [diff] [blame] | 141 | #if IS_ENABLED(CONFIG_MPLS) |
| 142 | struct netns_mpls mpls; |
| 143 | #endif |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 144 | struct sock *diag_nlsk; |
Timo Teräs | 5aad1de | 2013-05-27 20:46:33 +0000 | [diff] [blame] | 145 | atomic_t fnhe_genid; |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 146 | }; |
| 147 | |
Denis V. Lunev | c0f3932 | 2008-04-02 00:10:28 -0700 | [diff] [blame] | 148 | #include <linux/seq_file_net.h> |
| 149 | |
Daniel Lezcano | 4fabcd7 | 2007-09-13 09:16:29 +0200 | [diff] [blame] | 150 | /* Init's network namespace */ |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 151 | extern struct net init_net; |
Denis V. Lunev | a4aa834 | 2008-04-03 13:04:33 -0700 | [diff] [blame] | 152 | |
Eric W. Biederman | d727abc | 2012-06-14 02:16:42 -0700 | [diff] [blame] | 153 | #ifdef CONFIG_NET_NS |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 154 | struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns, |
| 155 | struct net *old_net); |
Denis V. Lunev | 225c0a0 | 2008-04-02 00:09:29 -0700 | [diff] [blame] | 156 | |
Eric W. Biederman | d727abc | 2012-06-14 02:16:42 -0700 | [diff] [blame] | 157 | #else /* CONFIG_NET_NS */ |
| 158 | #include <linux/sched.h> |
| 159 | #include <linux/nsproxy.h> |
Eric W. Biederman | 038e733 | 2012-06-14 02:31:10 -0700 | [diff] [blame] | 160 | static inline struct net *copy_net_ns(unsigned long flags, |
| 161 | struct user_namespace *user_ns, struct net *old_net) |
Eric W. Biederman | 9dd776b | 2007-09-26 22:04:26 -0700 | [diff] [blame] | 162 | { |
Eric W. Biederman | d727abc | 2012-06-14 02:16:42 -0700 | [diff] [blame] | 163 | if (flags & CLONE_NEWNET) |
| 164 | return ERR_PTR(-EINVAL); |
| 165 | return old_net; |
Eric W. Biederman | 9dd776b | 2007-09-26 22:04:26 -0700 | [diff] [blame] | 166 | } |
Eric W. Biederman | d727abc | 2012-06-14 02:16:42 -0700 | [diff] [blame] | 167 | #endif /* CONFIG_NET_NS */ |
Denis V. Lunev | 225c0a0 | 2008-04-02 00:09:29 -0700 | [diff] [blame] | 168 | |
| 169 | |
| 170 | extern struct list_head net_namespace_list; |
Eric W. Biederman | 9dd776b | 2007-09-26 22:04:26 -0700 | [diff] [blame] | 171 | |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 172 | struct net *get_net_ns_by_pid(pid_t pid); |
Stefan Hajnoczi | 0f5258c | 2016-11-18 09:41:46 +0000 | [diff] [blame] | 173 | struct net *get_net_ns_by_fd(int fd); |
Johannes Berg | 30ffee8 | 2009-07-10 09:51:35 +0000 | [diff] [blame] | 174 | |
Rashika Kheria | 535d3ae | 2014-02-09 22:29:14 +0530 | [diff] [blame] | 175 | #ifdef CONFIG_SYSCTL |
| 176 | void ipx_register_sysctl(void); |
| 177 | void ipx_unregister_sysctl(void); |
| 178 | #else |
| 179 | #define ipx_register_sysctl() |
| 180 | #define ipx_unregister_sysctl() |
| 181 | #endif |
| 182 | |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 183 | #ifdef CONFIG_NET_NS |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 184 | void __put_net(struct net *net); |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 185 | |
| 186 | static inline struct net *get_net(struct net *net) |
| 187 | { |
| 188 | atomic_inc(&net->count); |
| 189 | return net; |
| 190 | } |
| 191 | |
Eric W. Biederman | 077130c | 2007-09-13 09:18:57 +0200 | [diff] [blame] | 192 | static inline struct net *maybe_get_net(struct net *net) |
| 193 | { |
| 194 | /* Used when we know struct net exists but we |
| 195 | * aren't guaranteed a previous reference count |
| 196 | * exists. If the reference count is zero this |
| 197 | * function fails and returns NULL. |
| 198 | */ |
| 199 | if (!atomic_inc_not_zero(&net->count)) |
| 200 | net = NULL; |
| 201 | return net; |
| 202 | } |
| 203 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 204 | static inline void put_net(struct net *net) |
| 205 | { |
| 206 | if (atomic_dec_and_test(&net->count)) |
| 207 | __put_net(net); |
| 208 | } |
| 209 | |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 210 | static inline |
| 211 | int net_eq(const struct net *net1, const struct net *net2) |
| 212 | { |
| 213 | return net1 == net2; |
| 214 | } |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 215 | |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 216 | void net_drop_ns(void *); |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 217 | |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 218 | #else |
Eric W. Biederman | b9f75f4 | 2008-06-20 22:16:51 -0700 | [diff] [blame] | 219 | |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 220 | static inline struct net *get_net(struct net *net) |
| 221 | { |
| 222 | return net; |
| 223 | } |
| 224 | |
| 225 | static inline void put_net(struct net *net) |
| 226 | { |
| 227 | } |
| 228 | |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 229 | static inline struct net *maybe_get_net(struct net *net) |
| 230 | { |
| 231 | return net; |
| 232 | } |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 233 | |
| 234 | static inline |
| 235 | int net_eq(const struct net *net1, const struct net *net2) |
| 236 | { |
| 237 | return 1; |
| 238 | } |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 239 | |
| 240 | #define net_drop_ns NULL |
Pavel Emelyanov | d465579 | 2007-11-01 00:43:49 -0700 | [diff] [blame] | 241 | #endif |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 242 | |
Denis V. Lunev | 5d1e446 | 2008-04-16 01:58:04 -0700 | [diff] [blame] | 243 | |
Eric W. Biederman | 0c5c9fb | 2015-03-11 23:06:44 -0500 | [diff] [blame] | 244 | typedef struct { |
Eric Dumazet | 8f424b5 | 2008-11-12 00:53:30 -0800 | [diff] [blame] | 245 | #ifdef CONFIG_NET_NS |
Eric W. Biederman | 0c5c9fb | 2015-03-11 23:06:44 -0500 | [diff] [blame] | 246 | struct net *net; |
Eric Dumazet | 8f424b5 | 2008-11-12 00:53:30 -0800 | [diff] [blame] | 247 | #endif |
Eric W. Biederman | 0c5c9fb | 2015-03-11 23:06:44 -0500 | [diff] [blame] | 248 | } possible_net_t; |
| 249 | |
| 250 | static inline void write_pnet(possible_net_t *pnet, struct net *net) |
| 251 | { |
| 252 | #ifdef CONFIG_NET_NS |
| 253 | pnet->net = net; |
| 254 | #endif |
| 255 | } |
| 256 | |
| 257 | static inline struct net *read_pnet(const possible_net_t *pnet) |
| 258 | { |
| 259 | #ifdef CONFIG_NET_NS |
| 260 | return pnet->net; |
| 261 | #else |
| 262 | return &init_net; |
| 263 | #endif |
| 264 | } |
Denis V. Lunev | 5d1e446 | 2008-04-16 01:58:04 -0700 | [diff] [blame] | 265 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 266 | #define for_each_net(VAR) \ |
| 267 | list_for_each_entry(VAR, &net_namespace_list, list) |
| 268 | |
Johannes Berg | 11a28d3 | 2009-07-10 09:51:33 +0000 | [diff] [blame] | 269 | #define for_each_net_rcu(VAR) \ |
| 270 | list_for_each_entry_rcu(VAR, &net_namespace_list, list) |
| 271 | |
Pavel Emelyanov | 4665079 | 2007-10-08 20:38:39 -0700 | [diff] [blame] | 272 | #ifdef CONFIG_NET_NS |
| 273 | #define __net_init |
| 274 | #define __net_exit |
Denis V. Lunev | 022cbae | 2007-11-13 03:23:50 -0800 | [diff] [blame] | 275 | #define __net_initdata |
Andi Kleen | 04a6f82 | 2012-10-04 17:12:11 -0700 | [diff] [blame] | 276 | #define __net_initconst |
Pavel Emelyanov | 4665079 | 2007-10-08 20:38:39 -0700 | [diff] [blame] | 277 | #else |
| 278 | #define __net_init __init |
Fabian Frederick | bd721ea | 2016-08-02 14:03:33 -0700 | [diff] [blame] | 279 | #define __net_exit __ref |
Denis V. Lunev | 022cbae | 2007-11-13 03:23:50 -0800 | [diff] [blame] | 280 | #define __net_initdata __initdata |
Andi Kleen | 04a6f82 | 2012-10-04 17:12:11 -0700 | [diff] [blame] | 281 | #define __net_initconst __initconst |
Pavel Emelyanov | 4665079 | 2007-10-08 20:38:39 -0700 | [diff] [blame] | 282 | #endif |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 283 | |
Nicolas Dichtel | 7a0877d | 2015-05-07 11:02:49 +0200 | [diff] [blame] | 284 | int peernet2id_alloc(struct net *net, struct net *peer); |
Nicolas Dichtel | 59324cf | 2015-05-07 11:02:53 +0200 | [diff] [blame] | 285 | int peernet2id(struct net *net, struct net *peer); |
| 286 | bool peernet_has_id(struct net *net, struct net *peer); |
Nicolas Dichtel | 0c7aecd | 2015-01-15 15:11:15 +0100 | [diff] [blame] | 287 | struct net *get_net_ns_by_id(struct net *net, int id); |
| 288 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 289 | struct pernet_operations { |
| 290 | struct list_head list; |
| 291 | int (*init)(struct net *net); |
| 292 | void (*exit)(struct net *net); |
Eric W. Biederman | 72ad937 | 2009-12-03 02:29:03 +0000 | [diff] [blame] | 293 | void (*exit_batch)(struct list_head *net_exit_list); |
Eric W. Biederman | f875bae | 2009-11-29 22:25:28 +0000 | [diff] [blame] | 294 | int *id; |
| 295 | size_t size; |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 296 | }; |
| 297 | |
Eric W. Biederman | 17edde5 | 2009-02-22 00:11:09 -0800 | [diff] [blame] | 298 | /* |
| 299 | * Use these carefully. If you implement a network device and it |
| 300 | * needs per network namespace operations use device pernet operations, |
| 301 | * otherwise use pernet subsys operations. |
| 302 | * |
Johannes Berg | 4edf547 | 2009-07-15 06:16:34 +0000 | [diff] [blame] | 303 | * Network interfaces need to be removed from a dying netns _before_ |
| 304 | * subsys notifiers can be called, as most of the network code cleanup |
| 305 | * (which is done from subsys notifiers) runs with the assumption that |
| 306 | * dev_remove_pack has been called so no new packets will arrive during |
| 307 | * and after the cleanup functions have been called. dev_remove_pack |
| 308 | * is not per namespace so instead the guarantee of no more packets |
| 309 | * arriving in a network namespace is provided by ensuring that all |
| 310 | * network devices and all sockets have left the network namespace |
| 311 | * before the cleanup methods are called. |
Eric W. Biederman | 17edde5 | 2009-02-22 00:11:09 -0800 | [diff] [blame] | 312 | * |
| 313 | * For the longest time the ipv4 icmp code was registered as a pernet |
| 314 | * device which caused kernel oops, and panics during network |
| 315 | * namespace cleanup. So please don't get this wrong. |
| 316 | */ |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 317 | int register_pernet_subsys(struct pernet_operations *); |
| 318 | void unregister_pernet_subsys(struct pernet_operations *); |
| 319 | int register_pernet_device(struct pernet_operations *); |
| 320 | void unregister_pernet_device(struct pernet_operations *); |
Eric W. Biederman | f875bae | 2009-11-29 22:25:28 +0000 | [diff] [blame] | 321 | |
Eric W. Biederman | 95bdfcc | 2007-11-30 23:55:42 +1100 | [diff] [blame] | 322 | struct ctl_table; |
| 323 | struct ctl_table_header; |
Pavel Emelyanov | d62c612 | 2008-05-19 13:45:33 -0700 | [diff] [blame] | 324 | |
Eric W. Biederman | 2ca794e | 2012-04-19 13:20:32 +0000 | [diff] [blame] | 325 | #ifdef CONFIG_SYSCTL |
Joe Perches | e67e16e | 2013-09-21 10:22:48 -0700 | [diff] [blame] | 326 | int net_sysctl_init(void); |
| 327 | struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, |
| 328 | struct ctl_table *table); |
| 329 | void unregister_net_sysctl_table(struct ctl_table_header *header); |
Eric W. Biederman | 48c7495 | 2012-04-23 12:13:02 +0000 | [diff] [blame] | 330 | #else |
| 331 | static inline int net_sysctl_init(void) { return 0; } |
| 332 | static inline struct ctl_table_header *register_net_sysctl(struct net *net, |
| 333 | const char *path, struct ctl_table *table) |
| 334 | { |
| 335 | return NULL; |
| 336 | } |
| 337 | static inline void unregister_net_sysctl_table(struct ctl_table_header *header) |
| 338 | { |
| 339 | } |
| 340 | #endif |
| 341 | |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 342 | static inline int rt_genid_ipv4(struct net *net) |
Nicolas Dichtel | b42664f | 2012-09-10 22:09:44 +0000 | [diff] [blame] | 343 | { |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 344 | return atomic_read(&net->ipv4.rt_genid); |
Nicolas Dichtel | b42664f | 2012-09-10 22:09:44 +0000 | [diff] [blame] | 345 | } |
| 346 | |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 347 | static inline void rt_genid_bump_ipv4(struct net *net) |
Nicolas Dichtel | b42664f | 2012-09-10 22:09:44 +0000 | [diff] [blame] | 348 | { |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 349 | atomic_inc(&net->ipv4.rt_genid); |
| 350 | } |
| 351 | |
Hannes Frederic Sowa | 705f1c8 | 2014-09-28 00:46:06 +0200 | [diff] [blame] | 352 | extern void (*__fib6_flush_trees)(struct net *net); |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 353 | static inline void rt_genid_bump_ipv6(struct net *net) |
| 354 | { |
Hannes Frederic Sowa | 705f1c8 | 2014-09-28 00:46:06 +0200 | [diff] [blame] | 355 | if (__fib6_flush_trees) |
| 356 | __fib6_flush_trees(net); |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 357 | } |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 358 | |
Luis R. Rodriguez | 599018a | 2014-04-17 18:22:54 -0700 | [diff] [blame] | 359 | #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) |
| 360 | static inline struct netns_ieee802154_lowpan * |
| 361 | net_ieee802154_lowpan(struct net *net) |
| 362 | { |
| 363 | return &net->ieee802154_lowpan; |
| 364 | } |
Luis R. Rodriguez | 599018a | 2014-04-17 18:22:54 -0700 | [diff] [blame] | 365 | #endif |
| 366 | |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 367 | /* For callers who don't really care about whether it's IPv4 or IPv6 */ |
| 368 | static inline void rt_genid_bump_all(struct net *net) |
| 369 | { |
| 370 | rt_genid_bump_ipv4(net); |
| 371 | rt_genid_bump_ipv6(net); |
Nicolas Dichtel | b42664f | 2012-09-10 22:09:44 +0000 | [diff] [blame] | 372 | } |
Eric W. Biederman | 95bdfcc | 2007-11-30 23:55:42 +1100 | [diff] [blame] | 373 | |
Timo Teräs | 5aad1de | 2013-05-27 20:46:33 +0000 | [diff] [blame] | 374 | static inline int fnhe_genid(struct net *net) |
| 375 | { |
| 376 | return atomic_read(&net->fnhe_genid); |
| 377 | } |
| 378 | |
| 379 | static inline void fnhe_genid_bump(struct net *net) |
| 380 | { |
| 381 | atomic_inc(&net->fnhe_genid); |
| 382 | } |
| 383 | |
Eric W. Biederman | 5f256be | 2007-09-12 11:50:50 +0200 | [diff] [blame] | 384 | #endif /* __NET_NET_NAMESPACE_H */ |