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/
usr/
src/
linux-headers-3.0.0-14/
include/
net/
- drwxr-xr-x
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Viewing file: net_namespace.h (6.8 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* * Operations on the network namespace */ #ifndef __NET_NET_NAMESPACE_H #define __NET_NET_NAMESPACE_H
#include <asm/atomic.h> #include <linux/workqueue.h> #include <linux/list.h> #include <linux/sysctl.h>
#include <net/netns/core.h> #include <net/netns/mib.h> #include <net/netns/unix.h> #include <net/netns/packet.h> #include <net/netns/ipv4.h> #include <net/netns/ipv6.h> #include <net/netns/dccp.h> #include <net/netns/x_tables.h> #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) #include <net/netns/conntrack.h> #endif #include <net/netns/xfrm.h>
struct proc_dir_entry; struct net_device; struct sock; struct ctl_table_header; struct net_generic; struct sock; struct netns_ipvs;
#define NETDEV_HASHBITS 8 #define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
struct net { atomic_t passive; /* To decided when the network * namespace should be freed. */ atomic_t count; /* To decided when the network * namespace should be shut down. */ #ifdef NETNS_REFCNT_DEBUG atomic_t use_count; /* To track references we * destroy on demand */ #endif spinlock_t rules_mod_lock;
struct list_head list; /* list of network namespaces */ struct list_head cleanup_list; /* namespaces on death row */ struct list_head exit_list; /* Use only net_mutex */
struct proc_dir_entry *proc_net; struct proc_dir_entry *proc_net_stat;
#ifdef CONFIG_SYSCTL struct ctl_table_set sysctls; #endif
struct sock *rtnl; /* rtnetlink socket */ struct sock *genl_sock;
struct list_head dev_base_head; struct hlist_head *dev_name_head; struct hlist_head *dev_index_head;
/* core fib_rules */ struct list_head rules_ops;
struct net_device *loopback_dev; /* The loopback */ struct netns_core core; struct netns_mib mib; struct netns_packet packet; struct netns_unix unx; struct netns_ipv4 ipv4; #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) struct netns_ipv6 ipv6; #endif #if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE) struct netns_dccp dccp; #endif #ifdef CONFIG_NETFILTER struct netns_xt xt; #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) struct netns_ct ct; #endif struct sock *nfnl; struct sock *nfnl_stash; #endif #ifdef CONFIG_WEXT_CORE struct sk_buff_head wext_nlevents; #endif struct net_generic __rcu *gen;
/* Note : following structs are cache line aligned */ #ifdef CONFIG_XFRM struct netns_xfrm xfrm; #endif struct netns_ipvs *ipvs; };
#include <linux/seq_file_net.h>
/* Init's network namespace */ extern struct net init_net;
#ifdef CONFIG_NET extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
#else /* CONFIG_NET */ static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) { /* There is nothing to copy so this is a noop */ return net_ns; } #endif /* CONFIG_NET */
extern struct list_head net_namespace_list;
extern struct net *get_net_ns_by_pid(pid_t pid); extern struct net *get_net_ns_by_fd(int pid);
#ifdef CONFIG_NET_NS extern void __put_net(struct net *net);
static inline struct net *get_net(struct net *net) { atomic_inc(&net->count); return net; }
static inline struct net *maybe_get_net(struct net *net) { /* Used when we know struct net exists but we * aren't guaranteed a previous reference count * exists. If the reference count is zero this * function fails and returns NULL. */ if (!atomic_inc_not_zero(&net->count)) net = NULL; return net; }
static inline void put_net(struct net *net) { if (atomic_dec_and_test(&net->count)) __put_net(net); }
static inline int net_eq(const struct net *net1, const struct net *net2) { return net1 == net2; }
extern void net_drop_ns(void *);
#else
static inline struct net *get_net(struct net *net) { return net; }
static inline void put_net(struct net *net) { }
static inline struct net *maybe_get_net(struct net *net) { return net; }
static inline int net_eq(const struct net *net1, const struct net *net2) { return 1; }
#define net_drop_ns NULL #endif
#ifdef NETNS_REFCNT_DEBUG static inline struct net *hold_net(struct net *net) { if (net) atomic_inc(&net->use_count); return net; }
static inline void release_net(struct net *net) { if (net) atomic_dec(&net->use_count); } #else static inline struct net *hold_net(struct net *net) { return net; }
static inline void release_net(struct net *net) { } #endif
#ifdef CONFIG_NET_NS
static inline void write_pnet(struct net **pnet, struct net *net) { *pnet = net; }
static inline struct net *read_pnet(struct net * const *pnet) { return *pnet; }
#else
#define write_pnet(pnet, net) do { (void)(net);} while (0) #define read_pnet(pnet) (&init_net)
#endif
#define for_each_net(VAR) \ list_for_each_entry(VAR, &net_namespace_list, list)
#define for_each_net_rcu(VAR) \ list_for_each_entry_rcu(VAR, &net_namespace_list, list)
#ifdef CONFIG_NET_NS #define __net_init #define __net_exit #define __net_initdata #else #define __net_init __init #define __net_exit __exit_refok #define __net_initdata __initdata #endif
struct pernet_operations { struct list_head list; int (*init)(struct net *net); void (*exit)(struct net *net); void (*exit_batch)(struct list_head *net_exit_list); int *id; size_t size; };
/* * Use these carefully. If you implement a network device and it * needs per network namespace operations use device pernet operations, * otherwise use pernet subsys operations. * * Network interfaces need to be removed from a dying netns _before_ * subsys notifiers can be called, as most of the network code cleanup * (which is done from subsys notifiers) runs with the assumption that * dev_remove_pack has been called so no new packets will arrive during * and after the cleanup functions have been called. dev_remove_pack * is not per namespace so instead the guarantee of no more packets * arriving in a network namespace is provided by ensuring that all * network devices and all sockets have left the network namespace * before the cleanup methods are called. * * For the longest time the ipv4 icmp code was registered as a pernet * device which caused kernel oops, and panics during network * namespace cleanup. So please don't get this wrong. */ extern int register_pernet_subsys(struct pernet_operations *); extern void unregister_pernet_subsys(struct pernet_operations *); extern int register_pernet_device(struct pernet_operations *); extern void unregister_pernet_device(struct pernet_operations *);
struct ctl_path; struct ctl_table; struct ctl_table_header;
extern struct ctl_table_header *register_net_sysctl_table(struct net *net, const struct ctl_path *path, struct ctl_table *table); extern struct ctl_table_header *register_net_sysctl_rotable( const struct ctl_path *path, struct ctl_table *table); extern void unregister_net_sysctl_table(struct ctl_table_header *header);
#endif /* __NET_NET_NAMESPACE_H */
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