/*

 * 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 <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

struct proc_dir_entry;

struct net_device;

struct sock;

struct ctl_table_header;

struct net_generic;

struct net {

	atomic_t		count;		/* To decided when the network

						 *  namespace should be freed.

						 */

#ifdef NETNS_REFCNT_DEBUG

	atomic_t		use_count;	/* To track references we

						 * destroy on demand

						 */

#endif

	struct list_head	list;		/* list of network namespaces */

	struct work_struct	work;		/* work struct for freeing */

	struct proc_dir_entry 	*proc_net;

	struct proc_dir_entry 	*proc_net_stat;

#ifdef CONFIG_SYSCTL

	struct ctl_table_set	sysctls;

#endif

	struct net_device       *loopback_dev;          /* The loopback */

	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;

	spinlock_t		rules_mod_lock;

	struct sock 		*rtnl;			/* rtnetlink socket */

	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

#endif

	struct net_generic	*gen;

};

#include <linux/seq_file_net.h>

/* Init's network namespace */

extern struct net init_net;

#ifdef CONFIG_NET

#define INIT_NET_NS(net_ns) .net_ns = &init_net,

extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);

#else /* CONFIG_NET */

#define INIT_NET_NS(net_ns)

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;

#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;

}

#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;

}

#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

#define for_each_net(VAR)				\

	list_for_each_entry(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);

};

extern int register_pernet_subsys(struct pernet_operations *);

extern void unregister_pernet_subsys(struct pernet_operations *);

extern int register_pernet_gen_subsys(int *id, struct pernet_operations *);

extern void unregister_pernet_gen_subsys(int id, struct pernet_operations *);

extern int register_pernet_device(struct pernet_operations *);

extern void unregister_pernet_device(struct pernet_operations *);

extern int register_pernet_gen_device(int *id, struct pernet_operations *);

extern void unregister_pernet_gen_device(int id, 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 */