/*
 *  include/linux/ve_proto.h
 *
 *  Copyright (C) 2005  SWsoft
 *  All rights reserved.
 *  
 *  Licensing governed by "linux/COPYING.SWsoft" file.
 *
 */

#ifndef __VE_H__
#define __VE_H__

struct ve_struct;
struct task_struct;
struct seq_file;
struct net;

#ifdef CONFIG_VE

extern struct ve_struct ve0;

static inline struct ve_struct *get_ve0(void)
{
	return &ve0;
}

static inline bool ve_is_super(struct ve_struct *ve)
{
	return ve == &ve0;
}

#define get_exec_env()		(current->task_ve)

const char *ve_name(struct ve_struct *ve);

/* must be called under rcu_read_lock if task != current */
const char *task_ve_name(struct task_struct *task);

extern int ve_task_count(struct ve_struct *);

typedef void (*ve_seq_print_t)(struct seq_file *, struct ve_struct *);

void vzmon_register_veaddr_print_cb(ve_seq_print_t);
void vzmon_unregister_veaddr_print_cb(ve_seq_print_t);

#if defined(CONFIG_INET) && defined(CONFIG_VE_NETDEV)
int venet_init(void);
#endif

extern struct list_head ve_list_head;
#define for_each_ve(ve)	list_for_each_entry((ve), &ve_list_head, ve_list)
extern struct mutex ve_list_lock;
extern struct ve_struct *get_ve_by_id(envid_t);
extern struct cgroup *ve_cgroup_open(struct cgroup *root, int flags, envid_t veid);
extern int ve_cgroup_remove(struct cgroup *root, envid_t veid);

struct env_create_param3;
extern int real_env_create(envid_t veid, unsigned flags, u32 class_id,
			   struct env_create_param3 *data, int datalen);

extern int nr_threads_ve(struct ve_struct *ve);

enum {
	VE_SS_CHAIN,

	VE_MAX_CHAINS
};

typedef int ve_hook_init_fn(void *data);
typedef void ve_hook_fini_fn(void *data);

struct ve_hook
{
	ve_hook_init_fn *init;
	ve_hook_fini_fn *fini;
	struct module *owner;

	/* Functions are called in ascending priority */
	int priority;

	/* Private part */
	struct list_head list;
};

enum {
	HOOK_PRIO_DEFAULT = 0,

	HOOK_PRIO_FS = HOOK_PRIO_DEFAULT,

	HOOK_PRIO_NET_PRE,
	HOOK_PRIO_NET,
	HOOK_PRIO_NET_POST,
	HOOK_PRIO_NET_ACCT = 100,
	HOOK_PRIO_NET_ACCT_V6,

	HOOK_PRIO_AFTERALL = INT_MAX-1,
	HOOK_PRIO_FINISHING = INT_MAX,
};

void *ve_seq_start(struct seq_file *m, loff_t *pos);
void *ve_seq_next(struct seq_file *m, void *v, loff_t *pos);
void ve_seq_stop(struct seq_file *m, void *v);

extern int ve_hook_iterate_init(int chain, void *data);
extern void ve_hook_iterate_fini(int chain, void *data);

extern void ve_hook_register(int chain, struct ve_hook *vh);
extern void ve_hook_unregister(struct ve_hook *vh);
#else /* CONFIG_VE */
#define ve_hook_register(ch, vh)	do { } while (0)
#define ve_hook_unregister(ve)		do { } while (0)

static inline struct ve_struct *get_ve0(void)
{
	return NULL;
}

static inline struct ve_struct *get_exec_env(void)
{
	return NULL;
}

static inline bool ve_is_super(struct ve_struct *ve)
{
	return true;
}

static inline const char *ve_name(struct ve_struct *ve)
{
	return "0";
}

static inline const char *task_ve_name(struct task_struct *task)
{
	return "0";
}

#define nr_threads_ve(ve)	(nr_threads)

#endif /* CONFIG_VE */
#endif